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+/* -*- Mode: c; tab-width: 8; c-basic-offset: 4; indent-tabs-mode: t; -*- */
+/* cairo - a vector graphics library with display and print output
+ *
+ * Copyright © 2004 Red Hat, Inc
+ * Copyright © 2006 Red Hat, Inc
+ * Copyright © 2007, 2008 Adrian Johnson
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it either under the terms of the GNU Lesser General Public
+ * License version 2.1 as published by the Free Software Foundation
+ * (the "LGPL") or, at your option, under the terms of the Mozilla
+ * Public License Version 1.1 (the "MPL"). If you do not alter this
+ * notice, a recipient may use your version of this file under either
+ * the MPL or the LGPL.
+ *
+ * You should have received a copy of the LGPL along with this library
+ * in the file COPYING-LGPL-2.1; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
+ * You should have received a copy of the MPL along with this library
+ * in the file COPYING-MPL-1.1
+ *
+ * The contents of this file are subject to the Mozilla Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
+ * OF ANY KIND, either express or implied. See the LGPL or the MPL for
+ * the specific language governing rights and limitations.
+ *
+ * The Original Code is the cairo graphics library.
+ *
+ * The Initial Developer of the Original Code is University of Southern
+ * California.
+ *
+ * Contributor(s):
+ * Kristian Høgsberg <krh@redhat.com>
+ * Carl Worth <cworth@cworth.org>
+ * Adrian Johnson <ajohnson@redneon.com>
+ */
+
+#define _BSD_SOURCE /* for snprintf() */
+#include "cairoint.h"
+
+#include "cairo-pdf.h"
+#include "cairo-pdf-surface-private.h"
+#include "cairo-pdf-operators-private.h"
+#include "cairo-pdf-shading-private.h"
+
+#include "cairo-array-private.h"
+#include "cairo-analysis-surface-private.h"
+#include "cairo-composite-rectangles-private.h"
+#include "cairo-default-context-private.h"
+#include "cairo-error-private.h"
+#include "cairo-image-surface-inline.h"
+#include "cairo-image-info-private.h"
+#include "cairo-recording-surface-private.h"
+#include "cairo-output-stream-private.h"
+#include "cairo-paginated-private.h"
+#include "cairo-scaled-font-subsets-private.h"
+#include "cairo-surface-clipper-private.h"
+#include "cairo-surface-snapshot-inline.h"
+#include "cairo-surface-subsurface-private.h"
+#include "cairo-type3-glyph-surface-private.h"
+
+#include <time.h>
+#include <zlib.h>
+
+/* Issues:
+ *
+ * - We embed an image in the stream each time it's composited. We
+ * could add generation counters to surfaces and remember the stream
+ * ID for a particular generation for a particular surface.
+ *
+ * - Backend specific meta data.
+ */
+
+/*
+ * Page Structure of the Generated PDF:
+ *
+ * Each page requiring fallbacks images contains a knockout group at
+ * the top level. The first operation of the knockout group paints a
+ * group containing all the supported drawing operations. Fallback
+ * images (if any) are painted in the knockout group. This ensures
+ * that fallback images do not composite with any content under the
+ * fallback images.
+ *
+ * Streams:
+ *
+ * This PDF surface has three types of streams:
+ * - PDF Stream
+ * - Content Stream
+ * - Group Stream
+ *
+ * Calling _cairo_output_stream_printf (surface->output, ...) will
+ * write to the currently open stream.
+ *
+ * PDF Stream:
+ * A PDF Stream may be opened and closed with the following functions:
+ * _cairo_pdf_surface_open stream ()
+ * _cairo_pdf_surface_close_stream ()
+ *
+ * PDF Streams are written directly to the PDF file. They are used for
+ * fonts, images and patterns.
+ *
+ * Content Stream:
+ * The Content Stream is opened and closed with the following functions:
+ * _cairo_pdf_surface_open_content_stream ()
+ * _cairo_pdf_surface_close_content_stream ()
+ *
+ * The Content Stream contains the text and graphics operators.
+ *
+ * Group Stream:
+ * A Group Stream may be opened and closed with the following functions:
+ * _cairo_pdf_surface_open_group ()
+ * _cairo_pdf_surface_close_group ()
+ *
+ * A Group Stream is a Form XObject. It is used for short sequences
+ * of operators. As the content is very short the group is stored in
+ * memory until it is closed. This allows some optimization such as
+ * including the Resource dictionary and stream length inside the
+ * XObject instead of using an indirect object.
+ */
+
+/**
+ * SECTION:cairo-pdf
+ * @Title: PDF Surfaces
+ * @Short_Description: Rendering PDF documents
+ * @See_Also: #cairo_surface_t
+ *
+ * The PDF surface is used to render cairo graphics to Adobe
+ * PDF files and is a multi-page vector surface backend.
+ *
+ * The following mime types are supported: %CAIRO_MIME_TYPE_JPEG,
+ * %CAIRO_MIME_TYPE_JP2, %CAIRO_MIME_TYPE_UNIQUE_ID,
+ * %CAIRO_MIME_TYPE_JBIG2, %CAIRO_MIME_TYPE_JBIG2_GLOBAL,
+ * %CAIRO_MIME_TYPE_JBIG2_GLOBAL_ID.
+ *
+ * JBIG2 data in PDF must be in the embedded format as descibed in
+ * ISO/IEC 11544. Image specific JBIG2 data must be in
+ * %CAIRO_MIME_TYPE_JBIG2. Any global segments in the JBIG2 data
+ * (segments with page association field set to 0) must be in
+ * %CAIRO_MIME_TYPE_JBIG2_GLOBAL. The global data may be shared by
+ * multiple images. All images sharing the same global data must set
+ * %CAIRO_MIME_TYPE_JBIG2_GLOBAL_ID to a unique identifer. At least
+ * one of the images must provide the global data using
+ * %CAIRO_MIME_TYPE_JBIG2_GLOBAL. The global data will only be
+ * embedded once but shared by all JBIG2 images with the same
+ * %CAIRO_MIME_TYPE_JBIG2_GLOBAL_ID.
+ **/
+
+static cairo_bool_t
+_cairo_pdf_surface_get_extents (void *abstract_surface,
+ cairo_rectangle_int_t *rectangle);
+
+/**
+ * CAIRO_HAS_PDF_SURFACE:
+ *
+ * Defined if the PDF surface backend is available.
+ * This macro can be used to conditionally compile backend-specific code.
+ *
+ * Since: 1.2
+ **/
+
+static const cairo_pdf_version_t _cairo_pdf_versions[] =
+{
+ CAIRO_PDF_VERSION_1_4,
+ CAIRO_PDF_VERSION_1_5
+};
+
+#define CAIRO_PDF_VERSION_LAST ARRAY_LENGTH (_cairo_pdf_versions)
+
+static const char * _cairo_pdf_version_strings[CAIRO_PDF_VERSION_LAST] =
+{
+ "PDF 1.4",
+ "PDF 1.5"
+};
+
+static const char *_cairo_pdf_supported_mime_types[] =
+{
+ CAIRO_MIME_TYPE_JPEG,
+ CAIRO_MIME_TYPE_JP2,
+ CAIRO_MIME_TYPE_UNIQUE_ID,
+ CAIRO_MIME_TYPE_JBIG2,
+ CAIRO_MIME_TYPE_JBIG2_GLOBAL,
+ CAIRO_MIME_TYPE_JBIG2_GLOBAL_ID,
+ NULL
+};
+
+typedef struct _cairo_pdf_object {
+ long offset;
+} cairo_pdf_object_t;
+
+typedef struct _cairo_pdf_font {
+ unsigned int font_id;
+ unsigned int subset_id;
+ cairo_pdf_resource_t subset_resource;
+} cairo_pdf_font_t;
+
+typedef struct _cairo_pdf_rgb_linear_function {
+ cairo_pdf_resource_t resource;
+ double color1[3];
+ double color2[3];
+} cairo_pdf_rgb_linear_function_t;
+
+typedef struct _cairo_pdf_alpha_linear_function {
+ cairo_pdf_resource_t resource;
+ double alpha1;
+ double alpha2;
+} cairo_pdf_alpha_linear_function_t;
+
+static cairo_pdf_resource_t
+_cairo_pdf_surface_new_object (cairo_pdf_surface_t *surface);
+
+static void
+_cairo_pdf_surface_clear (cairo_pdf_surface_t *surface);
+
+static void
+_cairo_pdf_smask_group_destroy (cairo_pdf_smask_group_t *group);
+
+static cairo_int_status_t
+_cairo_pdf_surface_add_font (unsigned int font_id,
+ unsigned int subset_id,
+ void *closure);
+
+static void
+_cairo_pdf_group_resources_init (cairo_pdf_group_resources_t *res);
+
+static cairo_int_status_t
+_cairo_pdf_surface_open_stream (cairo_pdf_surface_t *surface,
+ cairo_pdf_resource_t *resource,
+ cairo_bool_t compressed,
+ const char *fmt,
+ ...) CAIRO_PRINTF_FORMAT(4, 5);
+static cairo_int_status_t
+_cairo_pdf_surface_close_stream (cairo_pdf_surface_t *surface);
+
+static cairo_int_status_t
+_cairo_pdf_surface_write_page (cairo_pdf_surface_t *surface);
+
+static void
+_cairo_pdf_surface_write_pages (cairo_pdf_surface_t *surface);
+
+static cairo_pdf_resource_t
+_cairo_pdf_surface_write_info (cairo_pdf_surface_t *surface);
+
+static cairo_pdf_resource_t
+_cairo_pdf_surface_write_catalog (cairo_pdf_surface_t *surface);
+
+static long
+_cairo_pdf_surface_write_xref (cairo_pdf_surface_t *surface);
+
+static cairo_int_status_t
+_cairo_pdf_surface_write_page (cairo_pdf_surface_t *surface);
+
+static cairo_int_status_t
+_cairo_pdf_surface_emit_font_subsets (cairo_pdf_surface_t *surface);
+
+static cairo_bool_t
+_cairo_pdf_source_surface_equal (const void *key_a, const void *key_b);
+
+static const cairo_surface_backend_t cairo_pdf_surface_backend;
+static const cairo_paginated_surface_backend_t cairo_pdf_surface_paginated_backend;
+
+static cairo_pdf_resource_t
+_cairo_pdf_surface_new_object (cairo_pdf_surface_t *surface)
+{
+ cairo_pdf_resource_t resource;
+ cairo_int_status_t status;
+ cairo_pdf_object_t object;
+
+ object.offset = _cairo_output_stream_get_position (surface->output);
+
+ status = _cairo_array_append (&surface->objects, &object);
+ if (unlikely (status)) {
+ resource.id = 0;
+ return resource;
+ }
+
+ resource = surface->next_available_resource;
+ surface->next_available_resource.id++;
+
+ return resource;
+}
+
+static void
+_cairo_pdf_surface_update_object (cairo_pdf_surface_t *surface,
+ cairo_pdf_resource_t resource)
+{
+ cairo_pdf_object_t *object;
+
+ object = _cairo_array_index (&surface->objects, resource.id - 1);
+ object->offset = _cairo_output_stream_get_position (surface->output);
+}
+
+static void
+_cairo_pdf_surface_set_size_internal (cairo_pdf_surface_t *surface,
+ double width,
+ double height)
+{
+ surface->width = width;
+ surface->height = height;
+ cairo_matrix_init (&surface->cairo_to_pdf, 1, 0, 0, -1, 0, height);
+ _cairo_pdf_operators_set_cairo_to_pdf_matrix (&surface->pdf_operators,
+ &surface->cairo_to_pdf);
+}
+
+static cairo_bool_t
+_path_covers_bbox (cairo_pdf_surface_t *surface,
+ cairo_path_fixed_t *path)
+{
+ cairo_box_t box;
+
+ return _cairo_path_fixed_is_box (path, &box) &&
+ box.p1.x <= 0 &&
+ box.p1.y <= 0 &&
+ box.p2.x >= _cairo_fixed_from_double (surface->width) &&
+ box.p2.y >= _cairo_fixed_from_double (surface->height);
+}
+
+static cairo_status_t
+_cairo_pdf_surface_clipper_intersect_clip_path (cairo_surface_clipper_t *clipper,
+ cairo_path_fixed_t *path,
+ cairo_fill_rule_t fill_rule,
+ double tolerance,
+ cairo_antialias_t antialias)
+{
+ cairo_pdf_surface_t *surface = cairo_container_of (clipper,
+ cairo_pdf_surface_t,
+ clipper);
+ cairo_int_status_t status;
+
+ status = _cairo_pdf_operators_flush (&surface->pdf_operators);
+ if (unlikely (status))
+ return status;
+
+ if (path == NULL) {
+ _cairo_output_stream_printf (surface->output, "Q q\n");
+
+ surface->current_pattern_is_solid_color = FALSE;
+ _cairo_pdf_operators_reset (&surface->pdf_operators);
+
+ return CAIRO_STATUS_SUCCESS;
+ }
+
+ if (_path_covers_bbox (surface, path))
+ return CAIRO_STATUS_SUCCESS;
+
+ return _cairo_pdf_operators_clip (&surface->pdf_operators, path, fill_rule);
+}
+
+static cairo_surface_t *
+_cairo_pdf_surface_create_for_stream_internal (cairo_output_stream_t *output,
+ double width,
+ double height)
+{
+ cairo_pdf_surface_t *surface;
+ cairo_status_t status, status_ignored;
+
+ surface = malloc (sizeof (cairo_pdf_surface_t));
+ if (unlikely (surface == NULL)) {
+ /* destroy stream on behalf of caller */
+ status = _cairo_output_stream_destroy (output);
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
+ }
+
+ _cairo_surface_init (&surface->base,
+ &cairo_pdf_surface_backend,
+ NULL, /* device */
+ CAIRO_CONTENT_COLOR_ALPHA);
+
+ surface->output = output;
+ surface->width = width;
+ surface->height = height;
+ cairo_matrix_init (&surface->cairo_to_pdf, 1, 0, 0, -1, 0, height);
+
+ _cairo_array_init (&surface->objects, sizeof (cairo_pdf_object_t));
+ _cairo_array_init (&surface->pages, sizeof (cairo_pdf_resource_t));
+ _cairo_array_init (&surface->rgb_linear_functions, sizeof (cairo_pdf_rgb_linear_function_t));
+ _cairo_array_init (&surface->alpha_linear_functions, sizeof (cairo_pdf_alpha_linear_function_t));
+ _cairo_array_init (&surface->fonts, sizeof (cairo_pdf_font_t));
+ _cairo_array_init (&surface->smask_groups, sizeof (cairo_pdf_smask_group_t *));
+ _cairo_array_init (&surface->knockout_group, sizeof (cairo_pdf_resource_t));
+
+ _cairo_array_init (&surface->page_patterns, sizeof (cairo_pdf_pattern_t));
+ _cairo_array_init (&surface->page_surfaces, sizeof (cairo_pdf_source_surface_t));
+ _cairo_array_init (&surface->jbig2_global, sizeof (cairo_pdf_jbig2_global_t));
+ surface->all_surfaces = _cairo_hash_table_create (_cairo_pdf_source_surface_equal);
+ if (unlikely (surface->all_surfaces == NULL)) {
+ status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ goto BAIL0;
+ }
+
+ _cairo_pdf_group_resources_init (&surface->resources);
+
+ surface->font_subsets = _cairo_scaled_font_subsets_create_composite ();
+ if (! surface->font_subsets) {
+ status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ goto BAIL1;
+ }
+
+ _cairo_scaled_font_subsets_enable_latin_subset (surface->font_subsets, TRUE);
+
+ surface->next_available_resource.id = 1;
+ surface->pages_resource = _cairo_pdf_surface_new_object (surface);
+ if (surface->pages_resource.id == 0) {
+ status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ goto BAIL2;
+ }
+
+ surface->pdf_version = CAIRO_PDF_VERSION_1_5;
+ surface->compress_content = TRUE;
+ surface->pdf_stream.active = FALSE;
+ surface->pdf_stream.old_output = NULL;
+ surface->group_stream.active = FALSE;
+ surface->group_stream.stream = NULL;
+ surface->group_stream.mem_stream = NULL;
+
+ surface->paginated_mode = CAIRO_PAGINATED_MODE_ANALYZE;
+
+ surface->force_fallbacks = FALSE;
+ surface->select_pattern_gstate_saved = FALSE;
+ surface->current_pattern_is_solid_color = FALSE;
+ surface->current_operator = CAIRO_OPERATOR_OVER;
+ surface->header_emitted = FALSE;
+
+ _cairo_surface_clipper_init (&surface->clipper,
+ _cairo_pdf_surface_clipper_intersect_clip_path);
+
+ _cairo_pdf_operators_init (&surface->pdf_operators,
+ surface->output,
+ &surface->cairo_to_pdf,
+ surface->font_subsets,
+ FALSE);
+ _cairo_pdf_operators_set_font_subsets_callback (&surface->pdf_operators,
+ _cairo_pdf_surface_add_font,
+ surface);
+ _cairo_pdf_operators_enable_actual_text(&surface->pdf_operators, TRUE);
+
+ surface->paginated_surface = _cairo_paginated_surface_create (
+ &surface->base,
+ CAIRO_CONTENT_COLOR_ALPHA,
+ &cairo_pdf_surface_paginated_backend);
+
+ status = surface->paginated_surface->status;
+ if (status == CAIRO_STATUS_SUCCESS) {
+ /* paginated keeps the only reference to surface now, drop ours */
+ cairo_surface_destroy (&surface->base);
+ return surface->paginated_surface;
+ }
+
+BAIL2:
+ _cairo_scaled_font_subsets_destroy (surface->font_subsets);
+BAIL1:
+ _cairo_hash_table_destroy (surface->all_surfaces);
+BAIL0:
+ _cairo_array_fini (&surface->objects);
+ free (surface);
+
+ /* destroy stream on behalf of caller */
+ status_ignored = _cairo_output_stream_destroy (output);
+
+ return _cairo_surface_create_in_error (status);
+}
+
+/**
+ * cairo_pdf_surface_create_for_stream:
+ * @write_func: a #cairo_write_func_t to accept the output data, may be %NULL
+ * to indicate a no-op @write_func. With a no-op @write_func,
+ * the surface may be queried or used as a source without
+ * generating any temporary files.
+ * @closure: the closure argument for @write_func
+ * @width_in_points: width of the surface, in points (1 point == 1/72.0 inch)
+ * @height_in_points: height of the surface, in points (1 point == 1/72.0 inch)
+ *
+ * Creates a PDF surface of the specified size in points to be written
+ * incrementally to the stream represented by @write_func and @closure.
+ *
+ * Return value: a pointer to the newly created surface. The caller
+ * owns the surface and should call cairo_surface_destroy() when done
+ * with it.
+ *
+ * This function always returns a valid pointer, but it will return a
+ * pointer to a "nil" surface if an error such as out of memory
+ * occurs. You can use cairo_surface_status() to check for this.
+ *
+ * Since: 1.2
+ **/
+cairo_surface_t *
+cairo_pdf_surface_create_for_stream (cairo_write_func_t write_func,
+ void *closure,
+ double width_in_points,
+ double height_in_points)
+{
+ cairo_output_stream_t *output;
+
+ output = _cairo_output_stream_create (write_func, NULL, closure);
+ if (_cairo_output_stream_get_status (output))
+ return _cairo_surface_create_in_error (_cairo_output_stream_destroy (output));
+
+ return _cairo_pdf_surface_create_for_stream_internal (output,
+ width_in_points,
+ height_in_points);
+}
+
+/**
+ * cairo_pdf_surface_create:
+ * @filename: a filename for the PDF output (must be writable), %NULL may be
+ * used to specify no output. This will generate a PDF surface that
+ * may be queried and used as a source, without generating a
+ * temporary file.
+ * @width_in_points: width of the surface, in points (1 point == 1/72.0 inch)
+ * @height_in_points: height of the surface, in points (1 point == 1/72.0 inch)
+ *
+ * Creates a PDF surface of the specified size in points to be written
+ * to @filename.
+ *
+ * Return value: a pointer to the newly created surface. The caller
+ * owns the surface and should call cairo_surface_destroy() when done
+ * with it.
+ *
+ * This function always returns a valid pointer, but it will return a
+ * pointer to a "nil" surface if an error such as out of memory
+ * occurs. You can use cairo_surface_status() to check for this.
+ *
+ * Since: 1.2
+ **/
+cairo_surface_t *
+cairo_pdf_surface_create (const char *filename,
+ double width_in_points,
+ double height_in_points)
+{
+ cairo_output_stream_t *output;
+
+ output = _cairo_output_stream_create_for_filename (filename);
+ if (_cairo_output_stream_get_status (output))
+ return _cairo_surface_create_in_error (_cairo_output_stream_destroy (output));
+
+ return _cairo_pdf_surface_create_for_stream_internal (output,
+ width_in_points,
+ height_in_points);
+}
+
+static cairo_bool_t
+_cairo_surface_is_pdf (cairo_surface_t *surface)
+{
+ return surface->backend == &cairo_pdf_surface_backend;
+}
+
+/* If the abstract_surface is a paginated surface, and that paginated
+ * surface's target is a pdf_surface, then set pdf_surface to that
+ * target. Otherwise return FALSE.
+ */
+static cairo_bool_t
+_extract_pdf_surface (cairo_surface_t *surface,
+ cairo_pdf_surface_t **pdf_surface)
+{
+ cairo_surface_t *target;
+ cairo_status_t status_ignored;
+
+ if (surface->status)
+ return FALSE;
+ if (surface->finished) {
+ status_ignored = _cairo_surface_set_error (surface,
+ _cairo_error (CAIRO_STATUS_SURFACE_FINISHED));
+ return FALSE;
+ }
+
+ if (! _cairo_surface_is_paginated (surface)) {
+ status_ignored = _cairo_surface_set_error (surface,
+ _cairo_error (CAIRO_STATUS_SURFACE_TYPE_MISMATCH));
+ return FALSE;
+ }
+
+ target = _cairo_paginated_surface_get_target (surface);
+ if (target->status) {
+ status_ignored = _cairo_surface_set_error (surface,
+ target->status);
+ return FALSE;
+ }
+ if (target->finished) {
+ status_ignored = _cairo_surface_set_error (surface,
+ _cairo_error (CAIRO_STATUS_SURFACE_FINISHED));
+ return FALSE;
+ }
+
+ if (! _cairo_surface_is_pdf (target)) {
+ status_ignored = _cairo_surface_set_error (surface,
+ _cairo_error (CAIRO_STATUS_SURFACE_TYPE_MISMATCH));
+ return FALSE;
+ }
+
+ *pdf_surface = (cairo_pdf_surface_t *) target;
+ return TRUE;
+}
+
+/**
+ * cairo_pdf_surface_restrict_to_version:
+ * @surface: a PDF #cairo_surface_t
+ * @version: PDF version
+ *
+ * Restricts the generated PDF file to @version. See cairo_pdf_get_versions()
+ * for a list of available version values that can be used here.
+ *
+ * This function should only be called before any drawing operations
+ * have been performed on the given surface. The simplest way to do
+ * this is to call this function immediately after creating the
+ * surface.
+ *
+ * Since: 1.10
+ **/
+void
+cairo_pdf_surface_restrict_to_version (cairo_surface_t *abstract_surface,
+ cairo_pdf_version_t version)
+{
+ cairo_pdf_surface_t *surface = NULL; /* hide compiler warning */
+
+ if (! _extract_pdf_surface (abstract_surface, &surface))
+ return;
+
+ if (version < CAIRO_PDF_VERSION_LAST)
+ surface->pdf_version = version;
+
+ _cairo_pdf_operators_enable_actual_text(&surface->pdf_operators,
+ version >= CAIRO_PDF_VERSION_1_5);
+}
+
+/**
+ * cairo_pdf_get_versions:
+ * @versions: supported version list
+ * @num_versions: list length
+ *
+ * Used to retrieve the list of supported versions. See
+ * cairo_pdf_surface_restrict_to_version().
+ *
+ * Since: 1.10
+ **/
+void
+cairo_pdf_get_versions (cairo_pdf_version_t const **versions,
+ int *num_versions)
+{
+ if (versions != NULL)
+ *versions = _cairo_pdf_versions;
+
+ if (num_versions != NULL)
+ *num_versions = CAIRO_PDF_VERSION_LAST;
+}
+
+/**
+ * cairo_pdf_version_to_string:
+ * @version: a version id
+ *
+ * Get the string representation of the given @version id. This function
+ * will return %NULL if @version isn't valid. See cairo_pdf_get_versions()
+ * for a way to get the list of valid version ids.
+ *
+ * Return value: the string associated to given version.
+ *
+ * Since: 1.10
+ **/
+const char *
+cairo_pdf_version_to_string (cairo_pdf_version_t version)
+{
+ if (version >= CAIRO_PDF_VERSION_LAST)
+ return NULL;
+
+ return _cairo_pdf_version_strings[version];
+}
+
+/**
+ * cairo_pdf_surface_set_size:
+ * @surface: a PDF #cairo_surface_t
+ * @width_in_points: new surface width, in points (1 point == 1/72.0 inch)
+ * @height_in_points: new surface height, in points (1 point == 1/72.0 inch)
+ *
+ * Changes the size of a PDF surface for the current (and
+ * subsequent) pages.
+ *
+ * This function should only be called before any drawing operations
+ * have been performed on the current page. The simplest way to do
+ * this is to call this function immediately after creating the
+ * surface or immediately after completing a page with either
+ * cairo_show_page() or cairo_copy_page().
+ *
+ * Since: 1.2
+ **/
+void
+cairo_pdf_surface_set_size (cairo_surface_t *surface,
+ double width_in_points,
+ double height_in_points)
+{
+ cairo_pdf_surface_t *pdf_surface = NULL; /* hide compiler warning */
+ cairo_status_t status;
+
+ if (! _extract_pdf_surface (surface, &pdf_surface))
+ return;
+
+ _cairo_pdf_surface_set_size_internal (pdf_surface,
+ width_in_points,
+ height_in_points);
+ status = _cairo_paginated_surface_set_size (pdf_surface->paginated_surface,
+ width_in_points,
+ height_in_points);
+ if (status)
+ status = _cairo_surface_set_error (surface, status);
+}
+
+static void
+_cairo_pdf_surface_clear (cairo_pdf_surface_t *surface)
+{
+ int i, size;
+ cairo_pdf_pattern_t *pattern;
+ cairo_pdf_source_surface_t *src_surface;
+ cairo_pdf_smask_group_t *group;
+
+ size = _cairo_array_num_elements (&surface->page_patterns);
+ for (i = 0; i < size; i++) {
+ pattern = (cairo_pdf_pattern_t *) _cairo_array_index (&surface->page_patterns, i);
+ cairo_pattern_destroy (pattern->pattern);
+ }
+ _cairo_array_truncate (&surface->page_patterns, 0);
+
+ size = _cairo_array_num_elements (&surface->page_surfaces);
+ for (i = 0; i < size; i++) {
+ src_surface = (cairo_pdf_source_surface_t *) _cairo_array_index (&surface->page_surfaces, i);
+ cairo_surface_destroy (src_surface->surface);
+ }
+ _cairo_array_truncate (&surface->page_surfaces, 0);
+
+ size = _cairo_array_num_elements (&surface->smask_groups);
+ for (i = 0; i < size; i++) {
+ _cairo_array_copy_element (&surface->smask_groups, i, &group);
+ _cairo_pdf_smask_group_destroy (group);
+ }
+ _cairo_array_truncate (&surface->smask_groups, 0);
+ _cairo_array_truncate (&surface->knockout_group, 0);
+}
+
+static void
+_cairo_pdf_group_resources_init (cairo_pdf_group_resources_t *res)
+{
+ int i;
+
+ for (i = 0; i < CAIRO_NUM_OPERATORS; i++)
+ res->operators[i] = FALSE;
+
+ _cairo_array_init (&res->alphas, sizeof (double));
+ _cairo_array_init (&res->smasks, sizeof (cairo_pdf_resource_t));
+ _cairo_array_init (&res->patterns, sizeof (cairo_pdf_resource_t));
+ _cairo_array_init (&res->shadings, sizeof (cairo_pdf_resource_t));
+ _cairo_array_init (&res->xobjects, sizeof (cairo_pdf_resource_t));
+ _cairo_array_init (&res->fonts, sizeof (cairo_pdf_font_t));
+}
+
+static void
+_cairo_pdf_group_resources_fini (cairo_pdf_group_resources_t *res)
+{
+ _cairo_array_fini (&res->alphas);
+ _cairo_array_fini (&res->smasks);
+ _cairo_array_fini (&res->patterns);
+ _cairo_array_fini (&res->shadings);
+ _cairo_array_fini (&res->xobjects);
+ _cairo_array_fini (&res->fonts);
+}
+
+static void
+_cairo_pdf_group_resources_clear (cairo_pdf_group_resources_t *res)
+{
+ int i;
+
+ for (i = 0; i < CAIRO_NUM_OPERATORS; i++)
+ res->operators[i] = FALSE;
+
+ _cairo_array_truncate (&res->alphas, 0);
+ _cairo_array_truncate (&res->smasks, 0);
+ _cairo_array_truncate (&res->patterns, 0);
+ _cairo_array_truncate (&res->shadings, 0);
+ _cairo_array_truncate (&res->xobjects, 0);
+ _cairo_array_truncate (&res->fonts, 0);
+}
+
+static void
+_cairo_pdf_surface_add_operator (cairo_pdf_surface_t *surface,
+ cairo_operator_t op)
+{
+ cairo_pdf_group_resources_t *res = &surface->resources;
+
+ res->operators[op] = TRUE;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_add_alpha (cairo_pdf_surface_t *surface,
+ double alpha,
+ int *index)
+{
+ int num_alphas, i;
+ double other;
+ cairo_int_status_t status;
+ cairo_pdf_group_resources_t *res = &surface->resources;
+
+ num_alphas = _cairo_array_num_elements (&res->alphas);
+ for (i = 0; i < num_alphas; i++) {
+ _cairo_array_copy_element (&res->alphas, i, &other);
+ if (alpha == other) {
+ *index = i;
+ return CAIRO_STATUS_SUCCESS;
+ }
+ }
+
+ status = _cairo_array_append (&res->alphas, &alpha);
+ if (unlikely (status))
+ return status;
+
+ *index = _cairo_array_num_elements (&res->alphas) - 1;
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_add_smask (cairo_pdf_surface_t *surface,
+ cairo_pdf_resource_t smask)
+{
+ return _cairo_array_append (&(surface->resources.smasks), &smask);
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_add_pattern (cairo_pdf_surface_t *surface,
+ cairo_pdf_resource_t pattern)
+{
+ return _cairo_array_append (&(surface->resources.patterns), &pattern);
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_add_shading (cairo_pdf_surface_t *surface,
+ cairo_pdf_resource_t shading)
+{
+ return _cairo_array_append (&(surface->resources.shadings), &shading);
+}
+
+
+static cairo_int_status_t
+_cairo_pdf_surface_add_xobject (cairo_pdf_surface_t *surface,
+ cairo_pdf_resource_t xobject)
+{
+ return _cairo_array_append (&(surface->resources.xobjects), &xobject);
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_add_font (unsigned int font_id,
+ unsigned int subset_id,
+ void *closure)
+{
+ cairo_pdf_surface_t *surface = closure;
+ cairo_pdf_font_t font;
+ int num_fonts, i;
+ cairo_int_status_t status;
+ cairo_pdf_group_resources_t *res = &surface->resources;
+
+ num_fonts = _cairo_array_num_elements (&res->fonts);
+ for (i = 0; i < num_fonts; i++) {
+ _cairo_array_copy_element (&res->fonts, i, &font);
+ if (font.font_id == font_id &&
+ font.subset_id == subset_id)
+ return CAIRO_STATUS_SUCCESS;
+ }
+
+ num_fonts = _cairo_array_num_elements (&surface->fonts);
+ for (i = 0; i < num_fonts; i++) {
+ _cairo_array_copy_element (&surface->fonts, i, &font);
+ if (font.font_id == font_id &&
+ font.subset_id == subset_id)
+ return _cairo_array_append (&res->fonts, &font);
+ }
+
+ font.font_id = font_id;
+ font.subset_id = subset_id;
+ font.subset_resource = _cairo_pdf_surface_new_object (surface);
+ if (font.subset_resource.id == 0)
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+
+ status = _cairo_array_append (&surface->fonts, &font);
+ if (unlikely (status))
+ return status;
+
+ return _cairo_array_append (&res->fonts, &font);
+}
+
+static cairo_pdf_resource_t
+_cairo_pdf_surface_get_font_resource (cairo_pdf_surface_t *surface,
+ unsigned int font_id,
+ unsigned int subset_id)
+{
+ cairo_pdf_font_t font;
+ int num_fonts, i;
+
+ num_fonts = _cairo_array_num_elements (&surface->fonts);
+ for (i = 0; i < num_fonts; i++) {
+ _cairo_array_copy_element (&surface->fonts, i, &font);
+ if (font.font_id == font_id && font.subset_id == subset_id)
+ return font.subset_resource;
+ }
+
+ font.subset_resource.id = 0;
+ return font.subset_resource;
+}
+
+static const char *
+_cairo_operator_to_pdf_blend_mode (cairo_operator_t op)
+{
+ switch (op) {
+ /* The extend blend mode operators */
+ case CAIRO_OPERATOR_MULTIPLY: return "Multiply";
+ case CAIRO_OPERATOR_SCREEN: return "Screen";
+ case CAIRO_OPERATOR_OVERLAY: return "Overlay";
+ case CAIRO_OPERATOR_DARKEN: return "Darken";
+ case CAIRO_OPERATOR_LIGHTEN: return "Lighten";
+ case CAIRO_OPERATOR_COLOR_DODGE: return "ColorDodge";
+ case CAIRO_OPERATOR_COLOR_BURN: return "ColorBurn";
+ case CAIRO_OPERATOR_HARD_LIGHT: return "HardLight";
+ case CAIRO_OPERATOR_SOFT_LIGHT: return "SoftLight";
+ case CAIRO_OPERATOR_DIFFERENCE: return "Difference";
+ case CAIRO_OPERATOR_EXCLUSION: return "Exclusion";
+ case CAIRO_OPERATOR_HSL_HUE: return "Hue";
+ case CAIRO_OPERATOR_HSL_SATURATION: return "Saturation";
+ case CAIRO_OPERATOR_HSL_COLOR: return "Color";
+ case CAIRO_OPERATOR_HSL_LUMINOSITY: return "Luminosity";
+
+ default:
+ /* The original Porter-Duff set */
+ case CAIRO_OPERATOR_CLEAR:
+ case CAIRO_OPERATOR_SOURCE:
+ case CAIRO_OPERATOR_OVER:
+ case CAIRO_OPERATOR_IN:
+ case CAIRO_OPERATOR_OUT:
+ case CAIRO_OPERATOR_ATOP:
+ case CAIRO_OPERATOR_DEST:
+ case CAIRO_OPERATOR_DEST_OVER:
+ case CAIRO_OPERATOR_DEST_IN:
+ case CAIRO_OPERATOR_DEST_OUT:
+ case CAIRO_OPERATOR_DEST_ATOP:
+ case CAIRO_OPERATOR_XOR:
+ case CAIRO_OPERATOR_ADD:
+ case CAIRO_OPERATOR_SATURATE:
+ return "Normal";
+ }
+}
+
+static void
+_cairo_pdf_surface_emit_group_resources (cairo_pdf_surface_t *surface,
+ cairo_pdf_group_resources_t *res)
+{
+ int num_alphas, num_smasks, num_resources, i;
+ double alpha;
+ cairo_pdf_resource_t *smask, *pattern, *shading, *xobject;
+ cairo_pdf_font_t *font;
+
+ _cairo_output_stream_printf (surface->output, "<<\n");
+
+ num_alphas = _cairo_array_num_elements (&res->alphas);
+ num_smasks = _cairo_array_num_elements (&res->smasks);
+ if (num_alphas > 0 || num_smasks > 0) {
+ _cairo_output_stream_printf (surface->output,
+ " /ExtGState <<\n");
+
+ for (i = 0; i < CAIRO_NUM_OPERATORS; i++) {
+ if (res->operators[i]) {
+ _cairo_output_stream_printf (surface->output,
+ " /b%d << /BM /%s >>\n",
+ i, _cairo_operator_to_pdf_blend_mode(i));
+ }
+ }
+
+ for (i = 0; i < num_alphas; i++) {
+ _cairo_array_copy_element (&res->alphas, i, &alpha);
+ _cairo_output_stream_printf (surface->output,
+ " /a%d << /CA %f /ca %f >>\n",
+ i, alpha, alpha);
+ }
+
+ for (i = 0; i < num_smasks; i++) {
+ smask = _cairo_array_index (&res->smasks, i);
+ _cairo_output_stream_printf (surface->output,
+ " /s%d %d 0 R\n",
+ smask->id, smask->id);
+ }
+
+ _cairo_output_stream_printf (surface->output,
+ " >>\n");
+ }
+
+ num_resources = _cairo_array_num_elements (&res->patterns);
+ if (num_resources > 0) {
+ _cairo_output_stream_printf (surface->output,
+ " /Pattern <<");
+ for (i = 0; i < num_resources; i++) {
+ pattern = _cairo_array_index (&res->patterns, i);
+ _cairo_output_stream_printf (surface->output,
+ " /p%d %d 0 R",
+ pattern->id, pattern->id);
+ }
+
+ _cairo_output_stream_printf (surface->output,
+ " >>\n");
+ }
+
+ num_resources = _cairo_array_num_elements (&res->shadings);
+ if (num_resources > 0) {
+ _cairo_output_stream_printf (surface->output,
+ " /Shading <<");
+ for (i = 0; i < num_resources; i++) {
+ shading = _cairo_array_index (&res->shadings, i);
+ _cairo_output_stream_printf (surface->output,
+ " /sh%d %d 0 R",
+ shading->id, shading->id);
+ }
+
+ _cairo_output_stream_printf (surface->output,
+ " >>\n");
+ }
+
+ num_resources = _cairo_array_num_elements (&res->xobjects);
+ if (num_resources > 0) {
+ _cairo_output_stream_printf (surface->output,
+ " /XObject <<");
+
+ for (i = 0; i < num_resources; i++) {
+ xobject = _cairo_array_index (&res->xobjects, i);
+ _cairo_output_stream_printf (surface->output,
+ " /x%d %d 0 R",
+ xobject->id, xobject->id);
+ }
+
+ _cairo_output_stream_printf (surface->output,
+ " >>\n");
+ }
+
+ num_resources = _cairo_array_num_elements (&res->fonts);
+ if (num_resources > 0) {
+ _cairo_output_stream_printf (surface->output," /Font <<\n");
+ for (i = 0; i < num_resources; i++) {
+ font = _cairo_array_index (&res->fonts, i);
+ _cairo_output_stream_printf (surface->output,
+ " /f-%d-%d %d 0 R\n",
+ font->font_id,
+ font->subset_id,
+ font->subset_resource.id);
+ }
+ _cairo_output_stream_printf (surface->output, " >>\n");
+ }
+
+ _cairo_output_stream_printf (surface->output,
+ ">>\n");
+}
+
+static cairo_pdf_smask_group_t *
+_cairo_pdf_surface_create_smask_group (cairo_pdf_surface_t *surface,
+ const cairo_rectangle_int_t *extents)
+{
+ cairo_pdf_smask_group_t *group;
+
+ group = calloc (1, sizeof (cairo_pdf_smask_group_t));
+ if (unlikely (group == NULL)) {
+ _cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
+ return NULL;
+ }
+
+ group->group_res = _cairo_pdf_surface_new_object (surface);
+ if (group->group_res.id == 0) {
+ _cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
+ free (group);
+ return NULL;
+ }
+ group->width = surface->width;
+ group->height = surface->height;
+ if (extents != NULL) {
+ group->extents = *extents;
+ } else {
+ group->extents.x = 0;
+ group->extents.y = 0;
+ group->extents.width = surface->width;
+ group->extents.height = surface->height;
+ }
+ group->extents = *extents;
+
+ return group;
+}
+
+static void
+_cairo_pdf_smask_group_destroy (cairo_pdf_smask_group_t *group)
+{
+ if (group->operation == PDF_FILL || group->operation == PDF_STROKE)
+ _cairo_path_fixed_fini (&group->path);
+ if (group->source)
+ cairo_pattern_destroy (group->source);
+ if (group->mask)
+ cairo_pattern_destroy (group->mask);
+ free (group->utf8);
+ free (group->glyphs);
+ free (group->clusters);
+ if (group->scaled_font)
+ cairo_scaled_font_destroy (group->scaled_font);
+ free (group);
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_add_smask_group (cairo_pdf_surface_t *surface,
+ cairo_pdf_smask_group_t *group)
+{
+ return _cairo_array_append (&surface->smask_groups, &group);
+}
+
+static cairo_bool_t
+_cairo_pdf_source_surface_equal (const void *key_a, const void *key_b)
+{
+ const cairo_pdf_source_surface_entry_t *a = key_a;
+ const cairo_pdf_source_surface_entry_t *b = key_b;
+
+ if (a->interpolate != b->interpolate)
+ return FALSE;
+
+ if (a->unique_id && b->unique_id && a->unique_id_length == b->unique_id_length)
+ return (memcmp (a->unique_id, b->unique_id, a->unique_id_length) == 0);
+
+ return (a->id == b->id);
+}
+
+static void
+_cairo_pdf_source_surface_init_key (cairo_pdf_source_surface_entry_t *key)
+{
+ if (key->unique_id && key->unique_id_length > 0) {
+ key->base.hash = _cairo_hash_bytes (_CAIRO_HASH_INIT_VALUE,
+ key->unique_id, key->unique_id_length);
+ } else {
+ key->base.hash = key->id;
+ }
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_acquire_source_image_from_pattern (cairo_pdf_surface_t *surface,
+ const cairo_pattern_t *pattern,
+ cairo_image_surface_t **image,
+ void **image_extra)
+{
+ switch (pattern->type) {
+ case CAIRO_PATTERN_TYPE_SURFACE: {
+ cairo_surface_pattern_t *surf_pat = (cairo_surface_pattern_t *) pattern;
+ return _cairo_surface_acquire_source_image (surf_pat->surface, image, image_extra);
+ } break;
+
+ case CAIRO_PATTERN_TYPE_RASTER_SOURCE: {
+ cairo_surface_t *surf;
+ surf = _cairo_raster_source_pattern_acquire (pattern, &surface->base, NULL);
+ if (!surf)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+ assert (_cairo_surface_is_image (surf));
+ *image = (cairo_image_surface_t *) surf;
+ } break;
+
+ case CAIRO_PATTERN_TYPE_SOLID:
+ case CAIRO_PATTERN_TYPE_LINEAR:
+ case CAIRO_PATTERN_TYPE_RADIAL:
+ case CAIRO_PATTERN_TYPE_MESH:
+ default:
+ ASSERT_NOT_REACHED;
+ break;
+ }
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+static void
+_cairo_pdf_surface_release_source_image_from_pattern (cairo_pdf_surface_t *surface,
+ const cairo_pattern_t *pattern,
+ cairo_image_surface_t *image,
+ void *image_extra)
+{
+ switch (pattern->type) {
+ case CAIRO_PATTERN_TYPE_SURFACE: {
+ cairo_surface_pattern_t *surf_pat = (cairo_surface_pattern_t *) pattern;
+ _cairo_surface_release_source_image (surf_pat->surface, image, image_extra);
+ } break;
+
+ case CAIRO_PATTERN_TYPE_RASTER_SOURCE:
+ _cairo_raster_source_pattern_release (pattern, &image->base);
+ break;
+
+ case CAIRO_PATTERN_TYPE_SOLID:
+ case CAIRO_PATTERN_TYPE_LINEAR:
+ case CAIRO_PATTERN_TYPE_RADIAL:
+ case CAIRO_PATTERN_TYPE_MESH:
+ default:
+
+ ASSERT_NOT_REACHED;
+ break;
+ }
+}
+
+static cairo_int_status_t
+_get_jbig2_image_info (cairo_surface_t *source,
+ cairo_image_info_t *info,
+ const unsigned char **mime_data,
+ unsigned long *mime_data_length)
+{
+ cairo_surface_get_mime_data (source, CAIRO_MIME_TYPE_JBIG2,
+ mime_data, mime_data_length);
+ if (*mime_data == NULL)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ return _cairo_image_info_get_jbig2_info (info, *mime_data, *mime_data_length);
+}
+
+static cairo_int_status_t
+_get_jpx_image_info (cairo_surface_t *source,
+ cairo_image_info_t *info,
+ const unsigned char **mime_data,
+ unsigned long *mime_data_length)
+{
+ cairo_surface_get_mime_data (source, CAIRO_MIME_TYPE_JP2,
+ mime_data, mime_data_length);
+ if (*mime_data == NULL)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ return _cairo_image_info_get_jpx_info (info, *mime_data, *mime_data_length);
+}
+
+static cairo_int_status_t
+_get_jpeg_image_info (cairo_surface_t *source,
+ cairo_image_info_t *info,
+ const unsigned char **mime_data,
+ unsigned long *mime_data_length)
+{
+ cairo_surface_get_mime_data (source, CAIRO_MIME_TYPE_JPEG,
+ mime_data, mime_data_length);
+ if (*mime_data == NULL)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ return _cairo_image_info_get_jpeg_info (info, *mime_data, *mime_data_length);
+}
+
+static cairo_int_status_t
+_get_source_surface_size (cairo_surface_t *source,
+ int *width,
+ int *height,
+ cairo_rectangle_int_t *extents)
+{
+ cairo_int_status_t status;
+ cairo_image_info_t info;
+ const unsigned char *mime_data;
+ unsigned long mime_data_length;
+
+ if (source->type == CAIRO_SURFACE_TYPE_RECORDING) {
+ if (source->backend->type == CAIRO_SURFACE_TYPE_SUBSURFACE) {
+ cairo_surface_subsurface_t *sub = (cairo_surface_subsurface_t *) source;
+
+ *extents = sub->extents;
+ *width = extents->width;
+ *height = extents->height;
+ } else {
+ cairo_surface_t *free_me = NULL;
+ cairo_rectangle_int_t surf_extents;
+ cairo_box_t box;
+ cairo_bool_t bounded;
+
+ if (_cairo_surface_is_snapshot (source))
+ free_me = source = _cairo_surface_snapshot_get_target (source);
+
+ status = _cairo_recording_surface_get_ink_bbox ((cairo_recording_surface_t *)source,
+ &box, NULL);
+ if (unlikely (status)) {
+ cairo_surface_destroy (free_me);
+ return status;
+ }
+
+ bounded = _cairo_surface_get_extents (source, &surf_extents);
+ cairo_surface_destroy (free_me);
+
+ *width = surf_extents.width;
+ *height = surf_extents.height;
+
+ _cairo_box_round_to_rectangle (&box, extents);
+ }
+
+ return CAIRO_STATUS_SUCCESS;
+ }
+
+ extents->x = 0;
+ extents->y = 0;
+
+ status = _get_jbig2_image_info (source, &info, &mime_data, &mime_data_length);
+ if (status != CAIRO_INT_STATUS_UNSUPPORTED) {
+ *width = info.width;
+ *height = info.height;
+ extents->width = info.width;
+ extents->height = info.height;
+ return status;
+ }
+
+ status = _get_jpx_image_info (source, &info, &mime_data, &mime_data_length);
+ if (status != CAIRO_INT_STATUS_UNSUPPORTED) {
+ *width = info.width;
+ *height = info.height;
+ extents->width = info.width;
+ extents->height = info.height;
+ return status;
+ }
+
+ status = _get_jpeg_image_info (source, &info, &mime_data, &mime_data_length);
+ if (status != CAIRO_INT_STATUS_UNSUPPORTED) {
+ *width = info.width;
+ *height = info.height;
+ extents->width = info.width;
+ extents->height = info.height;
+ return status;
+ }
+
+ if (! _cairo_surface_get_extents (source, extents))
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ *width = extents->width;
+ *height = extents->height;
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+/**
+ * _cairo_pdf_surface_add_source_surface:
+ * @surface: the pdf surface
+ * @source_surface: A #cairo_surface_t to use as the source surface
+ * @source_pattern: A #cairo_pattern_t of type SURFACE or RASTER_SOURCE to use as the source
+ * @op: the operator used to composite this source
+ * @filter: filter type of the source pattern
+ * @stencil_mask: if true, the surface will be written to the PDF as an /ImageMask
+ * @smask: if true, only the alpha channel will be written (images only)
+ * @extents: extents of the operation that is using this source
+ * @smask_res: if not NULL, the image written will specify this resource as the smask for the image (images only)
+ * @surface_res: return PDF resource number of the surface
+ * @width: returns width of surface
+ * @height: returns height of surface
+ * @x_offset: x offset of surface
+ * @t_offset: y offset of surface
+ * @source_extents: returns extents of source (either ink extents or extents needed to cover @extents)
+ *
+ * Add surface or raster_source pattern to list of surfaces to be
+ * written to the PDF file when the current page is finished. Returns
+ * a PDF resource to reference the image. A hash table of all images
+ * in the PDF files (keyed by CAIRO_MIME_TYPE_UNIQUE_ID or surface
+ * unique_id) to ensure surfaces with the same id are only written
+ * once to the PDF file.
+ *
+ * Only one of @source_pattern or @source_surface is to be
+ * specified. Set the other to NULL.
+ **/
+static cairo_int_status_t
+_cairo_pdf_surface_add_source_surface (cairo_pdf_surface_t *surface,
+ cairo_surface_t *source_surface,
+ const cairo_pattern_t *source_pattern,
+ cairo_operator_t op,
+ cairo_filter_t filter,
+ cairo_bool_t stencil_mask,
+ cairo_bool_t smask,
+ const cairo_rectangle_int_t *extents,
+ cairo_pdf_resource_t *smask_res,
+ cairo_pdf_resource_t *surface_res,
+ int *width,
+ int *height,
+ double *x_offset,
+ double *y_offset,
+ cairo_rectangle_int_t *source_extents)
+{
+ cairo_pdf_source_surface_t src_surface;
+ cairo_pdf_source_surface_entry_t surface_key;
+ cairo_pdf_source_surface_entry_t *surface_entry;
+ cairo_int_status_t status;
+ cairo_bool_t interpolate;
+ unsigned char *unique_id = NULL;
+ unsigned long unique_id_length = 0;
+ cairo_image_surface_t *image;
+ void *image_extra;
+
+ switch (filter) {
+ default:
+ case CAIRO_FILTER_GOOD:
+ case CAIRO_FILTER_BEST:
+ case CAIRO_FILTER_BILINEAR:
+ interpolate = TRUE;
+ break;
+ case CAIRO_FILTER_FAST:
+ case CAIRO_FILTER_NEAREST:
+ case CAIRO_FILTER_GAUSSIAN:
+ interpolate = FALSE;
+ break;
+ }
+
+ *x_offset = 0;
+ *y_offset = 0;
+ if (source_pattern) {
+ if (source_pattern->type == CAIRO_PATTERN_TYPE_RASTER_SOURCE) {
+ status = _cairo_pdf_surface_acquire_source_image_from_pattern (surface, source_pattern,
+ &image, &image_extra);
+ if (unlikely (status))
+ return status;
+ source_surface = &image->base;
+ cairo_surface_get_device_offset (source_surface, x_offset, y_offset);
+ } else {
+ cairo_surface_pattern_t *surface_pattern = (cairo_surface_pattern_t *) source_pattern;
+ source_surface = surface_pattern->surface;
+ }
+ }
+
+ surface_key.id = source_surface->unique_id;
+ surface_key.interpolate = interpolate;
+ cairo_surface_get_mime_data (source_surface, CAIRO_MIME_TYPE_UNIQUE_ID,
+ (const unsigned char **) &surface_key.unique_id,
+ &surface_key.unique_id_length);
+ _cairo_pdf_source_surface_init_key (&surface_key);
+ surface_entry = _cairo_hash_table_lookup (surface->all_surfaces, &surface_key.base);
+ if (surface_entry) {
+ *surface_res = surface_entry->surface_res;
+ *width = surface_entry->width;
+ *height = surface_entry->height;
+ *source_extents = surface_entry->extents;
+ status = CAIRO_STATUS_SUCCESS;
+ } else {
+ status = _get_source_surface_size (source_surface,
+ width,
+ height,
+ source_extents);
+ if (unlikely(status))
+ goto release_source;
+
+ if (surface_key.unique_id && surface_key.unique_id_length > 0) {
+ unique_id = _cairo_malloc (surface_key.unique_id_length);
+ if (unique_id == NULL) {
+ status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ goto release_source;
+ }
+
+ unique_id_length = surface_key.unique_id_length;
+ memcpy (unique_id, surface_key.unique_id, unique_id_length);
+ } else {
+ unique_id = NULL;
+ unique_id_length = 0;
+ }
+ }
+
+release_source:
+ if (source_pattern && source_pattern->type == CAIRO_PATTERN_TYPE_RASTER_SOURCE)
+ _cairo_pdf_surface_release_source_image_from_pattern (surface, source_pattern, image, image_extra);
+
+ if (status || surface_entry)
+ return status;
+
+ surface_entry = malloc (sizeof (cairo_pdf_source_surface_entry_t));
+ if (surface_entry == NULL) {
+ status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ goto fail1;
+ }
+
+ surface_entry->id = surface_key.id;
+ surface_entry->operator = op;
+ surface_entry->interpolate = interpolate;
+ surface_entry->stencil_mask = stencil_mask;
+ surface_entry->smask = smask;
+ surface_entry->unique_id_length = unique_id_length;
+ surface_entry->unique_id = unique_id;
+ surface_entry->width = *width;
+ surface_entry->height = *height;
+ surface_entry->extents = *source_extents;
+ if (smask_res)
+ surface_entry->smask_res = *smask_res;
+ else
+ surface_entry->smask_res.id = 0;
+ _cairo_pdf_source_surface_init_key (surface_entry);
+
+ src_surface.hash_entry = surface_entry;
+ if (source_pattern && source_pattern->type == CAIRO_PATTERN_TYPE_RASTER_SOURCE) {
+ src_surface.type = CAIRO_PATTERN_TYPE_RASTER_SOURCE;
+ src_surface.surface = NULL;
+ status = _cairo_pattern_create_copy (&src_surface.raster_pattern, source_pattern);
+ if (unlikely (status))
+ goto fail2;
+
+ } else {
+ src_surface.type = CAIRO_PATTERN_TYPE_SURFACE;
+ src_surface.surface = cairo_surface_reference (source_surface);
+ src_surface.raster_pattern = NULL;
+ }
+
+ surface_entry->surface_res = _cairo_pdf_surface_new_object (surface);
+ if (surface_entry->surface_res.id == 0) {
+ status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ goto fail3;
+ }
+
+ status = _cairo_array_append (&surface->page_surfaces, &src_surface);
+ if (unlikely (status))
+ goto fail3;
+
+ status = _cairo_hash_table_insert (surface->all_surfaces,
+ &surface_entry->base);
+ if (unlikely(status))
+ goto fail3;
+
+ *surface_res = surface_entry->surface_res;
+
+ return status;
+
+fail3:
+ if (source_pattern && source_pattern->type == CAIRO_PATTERN_TYPE_RASTER_SOURCE)
+ cairo_pattern_destroy (src_surface.raster_pattern);
+ else
+ cairo_surface_destroy (src_surface.surface);
+
+fail2:
+ free (surface_entry);
+
+fail1:
+ free (unique_id);
+
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_add_pdf_pattern_or_shading (cairo_pdf_surface_t *surface,
+ const cairo_pattern_t *pattern,
+ cairo_operator_t op,
+ const cairo_rectangle_int_t *extents,
+ cairo_bool_t is_shading,
+ cairo_pdf_resource_t *pattern_res,
+ cairo_pdf_resource_t *gstate_res)
+{
+ cairo_pdf_pattern_t pdf_pattern;
+ cairo_int_status_t status;
+
+ pdf_pattern.is_shading = is_shading;
+ pdf_pattern.operator = op;
+
+ /* Solid colors are emitted into the content stream */
+ if (pattern->type == CAIRO_PATTERN_TYPE_SOLID) {
+ pattern_res->id = 0;
+ gstate_res->id = 0;
+ return CAIRO_INT_STATUS_SUCCESS;
+ }
+
+ status = _cairo_pattern_create_copy (&pdf_pattern.pattern, pattern);
+ if (unlikely (status))
+ return status;
+
+ pdf_pattern.pattern_res = _cairo_pdf_surface_new_object (surface);
+ if (pdf_pattern.pattern_res.id == 0) {
+ cairo_pattern_destroy (pdf_pattern.pattern);
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ }
+
+ pdf_pattern.gstate_res.id = 0;
+
+ /* gradient patterns require an smask object to implement transparency */
+ if (pattern->type == CAIRO_PATTERN_TYPE_LINEAR ||
+ pattern->type == CAIRO_PATTERN_TYPE_RADIAL ||
+ pattern->type == CAIRO_PATTERN_TYPE_MESH)
+ {
+ double min_alpha;
+
+ _cairo_pattern_alpha_range (pattern, &min_alpha, NULL);
+ if (! CAIRO_ALPHA_IS_OPAQUE (min_alpha)) {
+ pdf_pattern.gstate_res = _cairo_pdf_surface_new_object (surface);
+ if (pdf_pattern.gstate_res.id == 0) {
+ cairo_pattern_destroy (pdf_pattern.pattern);
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ }
+ }
+ }
+
+ pdf_pattern.width = surface->width;
+ pdf_pattern.height = surface->height;
+ if (extents != NULL) {
+ pdf_pattern.extents = *extents;
+ } else {
+ pdf_pattern.extents.x = 0;
+ pdf_pattern.extents.y = 0;
+ pdf_pattern.extents.width = surface->width;
+ pdf_pattern.extents.height = surface->height;
+ }
+
+ *pattern_res = pdf_pattern.pattern_res;
+ *gstate_res = pdf_pattern.gstate_res;
+
+ status = _cairo_array_append (&surface->page_patterns, &pdf_pattern);
+ if (unlikely (status)) {
+ cairo_pattern_destroy (pdf_pattern.pattern);
+ return status;
+ }
+
+ return CAIRO_INT_STATUS_SUCCESS;
+}
+
+/* Get BBox in PDF coordinates from extents in cairo coordinates */
+static void
+_get_bbox_from_extents (double surface_height,
+ const cairo_rectangle_int_t *extents,
+ cairo_box_double_t *bbox)
+{
+ bbox->p1.x = extents->x;
+ bbox->p1.y = surface_height - (extents->y + extents->height);
+ bbox->p2.x = extents->x + extents->width;
+ bbox->p2.y = surface_height - extents->y;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_add_pdf_shading (cairo_pdf_surface_t *surface,
+ const cairo_pattern_t *pattern,
+ cairo_operator_t op,
+ const cairo_rectangle_int_t *extents,
+ cairo_pdf_resource_t *shading_res,
+ cairo_pdf_resource_t *gstate_res)
+{
+ return _cairo_pdf_surface_add_pdf_pattern_or_shading (surface,
+ pattern,
+ op,
+ extents,
+ TRUE,
+ shading_res,
+ gstate_res);
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_add_pdf_pattern (cairo_pdf_surface_t *surface,
+ const cairo_pattern_t *pattern,
+ cairo_operator_t op,
+ const cairo_rectangle_int_t *extents,
+ cairo_pdf_resource_t *pattern_res,
+ cairo_pdf_resource_t *gstate_res)
+{
+ return _cairo_pdf_surface_add_pdf_pattern_or_shading (surface,
+ pattern,
+ op,
+ extents,
+ FALSE,
+ pattern_res,
+ gstate_res);
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_open_stream (cairo_pdf_surface_t *surface,
+ cairo_pdf_resource_t *resource,
+ cairo_bool_t compressed,
+ const char *fmt,
+ ...)
+{
+ va_list ap;
+ cairo_pdf_resource_t self, length;
+ cairo_output_stream_t *output = NULL;
+
+ if (resource) {
+ self = *resource;
+ _cairo_pdf_surface_update_object (surface, self);
+ } else {
+ self = _cairo_pdf_surface_new_object (surface);
+ if (self.id == 0)
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ }
+
+ length = _cairo_pdf_surface_new_object (surface);
+ if (length.id == 0)
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+
+ if (compressed) {
+ output = _cairo_deflate_stream_create (surface->output);
+ if (_cairo_output_stream_get_status (output))
+ return _cairo_output_stream_destroy (output);
+ }
+
+ surface->pdf_stream.active = TRUE;
+ surface->pdf_stream.self = self;
+ surface->pdf_stream.length = length;
+ surface->pdf_stream.compressed = compressed;
+ surface->current_pattern_is_solid_color = FALSE;
+ surface->current_operator = CAIRO_OPERATOR_OVER;
+ _cairo_pdf_operators_reset (&surface->pdf_operators);
+
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n"
+ "<< /Length %d 0 R\n",
+ surface->pdf_stream.self.id,
+ surface->pdf_stream.length.id);
+ if (compressed)
+ _cairo_output_stream_printf (surface->output,
+ " /Filter /FlateDecode\n");
+
+ if (fmt != NULL) {
+ va_start (ap, fmt);
+ _cairo_output_stream_vprintf (surface->output, fmt, ap);
+ va_end (ap);
+ }
+
+ _cairo_output_stream_printf (surface->output,
+ ">>\n"
+ "stream\n");
+
+ surface->pdf_stream.start_offset = _cairo_output_stream_get_position (surface->output);
+
+ if (compressed) {
+ assert (surface->pdf_stream.old_output == NULL);
+ surface->pdf_stream.old_output = surface->output;
+ surface->output = output;
+ _cairo_pdf_operators_set_stream (&surface->pdf_operators, surface->output);
+ }
+
+ return _cairo_output_stream_get_status (surface->output);
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_close_stream (cairo_pdf_surface_t *surface)
+{
+ cairo_int_status_t status;
+ long length;
+
+ if (! surface->pdf_stream.active)
+ return CAIRO_INT_STATUS_SUCCESS;
+
+ status = _cairo_pdf_operators_flush (&surface->pdf_operators);
+
+ if (surface->pdf_stream.compressed) {
+ cairo_int_status_t status2;
+
+ status2 = _cairo_output_stream_destroy (surface->output);
+ if (likely (status == CAIRO_INT_STATUS_SUCCESS))
+ status = status2;
+
+ surface->output = surface->pdf_stream.old_output;
+ _cairo_pdf_operators_set_stream (&surface->pdf_operators, surface->output);
+ surface->pdf_stream.old_output = NULL;
+ }
+
+ length = _cairo_output_stream_get_position (surface->output) -
+ surface->pdf_stream.start_offset;
+ _cairo_output_stream_printf (surface->output,
+ "\n"
+ "endstream\n"
+ "endobj\n");
+
+ _cairo_pdf_surface_update_object (surface,
+ surface->pdf_stream.length);
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n"
+ " %ld\n"
+ "endobj\n",
+ surface->pdf_stream.length.id,
+ length);
+
+ surface->pdf_stream.active = FALSE;
+
+ if (likely (status == CAIRO_INT_STATUS_SUCCESS))
+ status = _cairo_output_stream_get_status (surface->output);
+
+ return status;
+}
+
+static void
+_cairo_pdf_surface_write_memory_stream (cairo_pdf_surface_t *surface,
+ cairo_output_stream_t *mem_stream,
+ cairo_pdf_resource_t resource,
+ cairo_pdf_group_resources_t *resources,
+ cairo_bool_t is_knockout_group,
+ const cairo_box_double_t *bbox)
+{
+ _cairo_pdf_surface_update_object (surface, resource);
+
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n"
+ "<< /Type /XObject\n"
+ " /Length %d\n",
+ resource.id,
+ _cairo_memory_stream_length (mem_stream));
+
+ if (surface->compress_content) {
+ _cairo_output_stream_printf (surface->output,
+ " /Filter /FlateDecode\n");
+ }
+
+ _cairo_output_stream_printf (surface->output,
+ " /Subtype /Form\n"
+ " /BBox [ %f %f %f %f ]\n"
+ " /Group <<\n"
+ " /Type /Group\n"
+ " /S /Transparency\n"
+ " /I true\n"
+ " /CS /DeviceRGB\n",
+ bbox->p1.x, bbox->p1.y, bbox->p2.x, bbox->p2.y);
+
+ if (is_knockout_group)
+ _cairo_output_stream_printf (surface->output,
+ " /K true\n");
+
+ _cairo_output_stream_printf (surface->output,
+ " >>\n"
+ " /Resources\n");
+ _cairo_pdf_surface_emit_group_resources (surface, resources);
+ _cairo_output_stream_printf (surface->output,
+ ">>\n"
+ "stream\n");
+ _cairo_memory_stream_copy (mem_stream, surface->output);
+ _cairo_output_stream_printf (surface->output,
+ "endstream\n"
+ "endobj\n");
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_open_group (cairo_pdf_surface_t *surface,
+ const cairo_box_double_t *bbox,
+ cairo_pdf_resource_t *resource)
+{
+ cairo_int_status_t status;
+
+ assert (surface->pdf_stream.active == FALSE);
+ assert (surface->group_stream.active == FALSE);
+
+ surface->group_stream.active = TRUE;
+ surface->current_pattern_is_solid_color = FALSE;
+ surface->current_operator = CAIRO_OPERATOR_OVER;
+ _cairo_pdf_operators_reset (&surface->pdf_operators);
+
+ surface->group_stream.mem_stream = _cairo_memory_stream_create ();
+
+ if (surface->compress_content) {
+ surface->group_stream.stream =
+ _cairo_deflate_stream_create (surface->group_stream.mem_stream);
+ } else {
+ surface->group_stream.stream = surface->group_stream.mem_stream;
+ }
+ status = _cairo_output_stream_get_status (surface->group_stream.stream);
+
+ surface->group_stream.old_output = surface->output;
+ surface->output = surface->group_stream.stream;
+ _cairo_pdf_operators_set_stream (&surface->pdf_operators, surface->output);
+ _cairo_pdf_group_resources_clear (&surface->resources);
+
+ if (resource) {
+ surface->group_stream.resource = *resource;
+ } else {
+ surface->group_stream.resource = _cairo_pdf_surface_new_object (surface);
+ if (surface->group_stream.resource.id == 0)
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ }
+ surface->group_stream.is_knockout = FALSE;
+ surface->group_stream.bbox = *bbox;
+
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_open_knockout_group (cairo_pdf_surface_t *surface,
+ const cairo_box_double_t *bbox)
+{
+ cairo_int_status_t status;
+
+ status = _cairo_pdf_surface_open_group (surface, bbox, NULL);
+ if (unlikely (status))
+ return status;
+
+ surface->group_stream.is_knockout = TRUE;
+
+ return CAIRO_INT_STATUS_SUCCESS;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_close_group (cairo_pdf_surface_t *surface,
+ cairo_pdf_resource_t *group)
+{
+ cairo_int_status_t status = CAIRO_INT_STATUS_SUCCESS, status2;
+
+ assert (surface->pdf_stream.active == FALSE);
+ assert (surface->group_stream.active == TRUE);
+
+ status = _cairo_pdf_operators_flush (&surface->pdf_operators);
+ if (unlikely (status))
+ return status;
+
+ if (surface->compress_content) {
+ status = _cairo_output_stream_destroy (surface->group_stream.stream);
+ surface->group_stream.stream = NULL;
+
+ _cairo_output_stream_printf (surface->group_stream.mem_stream,
+ "\n");
+ }
+ surface->output = surface->group_stream.old_output;
+ _cairo_pdf_operators_set_stream (&surface->pdf_operators, surface->output);
+ surface->group_stream.active = FALSE;
+ _cairo_pdf_surface_write_memory_stream (surface,
+ surface->group_stream.mem_stream,
+ surface->group_stream.resource,
+ &surface->resources,
+ surface->group_stream.is_knockout,
+ &surface->group_stream.bbox);
+ if (group)
+ *group = surface->group_stream.resource;
+
+ status2 = _cairo_output_stream_destroy (surface->group_stream.mem_stream);
+ if (status == CAIRO_INT_STATUS_SUCCESS)
+ status = status2;
+
+ surface->group_stream.mem_stream = NULL;
+ surface->group_stream.stream = NULL;
+
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_open_content_stream (cairo_pdf_surface_t *surface,
+ const cairo_box_double_t *bbox,
+ cairo_pdf_resource_t *resource,
+ cairo_bool_t is_form,
+ cairo_bool_t is_group)
+{
+ cairo_int_status_t status;
+
+ assert (surface->pdf_stream.active == FALSE);
+ assert (surface->group_stream.active == FALSE);
+
+ surface->content_resources = _cairo_pdf_surface_new_object (surface);
+ if (surface->content_resources.id == 0)
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+
+ if (is_form) {
+ assert (bbox != NULL);
+
+ if (is_group) {
+ status =
+ _cairo_pdf_surface_open_stream (surface,
+ resource,
+ surface->compress_content,
+ " /Type /XObject\n"
+ " /Subtype /Form\n"
+ " /BBox [ %f %f %f %f ]\n"
+ " /Group <<\n"
+ " /Type /Group\n"
+ " /S /Transparency\n"
+ " /I true\n"
+ " /CS /DeviceRGB\n"
+ " >>\n"
+ " /Resources %d 0 R\n",
+ bbox->p1.x,
+ bbox->p1.y,
+ bbox->p2.x,
+ bbox->p2.y,
+ surface->content_resources.id);
+ } else {
+ status =
+ _cairo_pdf_surface_open_stream (surface,
+ resource,
+ surface->compress_content,
+ " /Type /XObject\n"
+ " /Subtype /Form\n"
+ " /BBox [ %f %f %f %f ]\n"
+ " /Resources %d 0 R\n",
+ bbox->p1.x,
+ bbox->p1.y,
+ bbox->p2.x,
+ bbox->p2.y,
+ surface->content_resources.id);
+ }
+ } else {
+ status =
+ _cairo_pdf_surface_open_stream (surface,
+ resource,
+ surface->compress_content,
+ NULL);
+ }
+ if (unlikely (status))
+ return status;
+
+ surface->content = surface->pdf_stream.self;
+
+ _cairo_output_stream_printf (surface->output, "q\n");
+
+ return _cairo_output_stream_get_status (surface->output);
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_close_content_stream (cairo_pdf_surface_t *surface)
+{
+ cairo_int_status_t status;
+
+ assert (surface->pdf_stream.active == TRUE);
+ assert (surface->group_stream.active == FALSE);
+
+ status = _cairo_pdf_operators_flush (&surface->pdf_operators);
+ if (unlikely (status))
+ return status;
+
+ _cairo_output_stream_printf (surface->output, "Q\n");
+ status = _cairo_pdf_surface_close_stream (surface);
+ if (unlikely (status))
+ return status;
+
+ _cairo_pdf_surface_update_object (surface, surface->content_resources);
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n",
+ surface->content_resources.id);
+ _cairo_pdf_surface_emit_group_resources (surface, &surface->resources);
+ _cairo_output_stream_printf (surface->output,
+ "endobj\n");
+
+ return _cairo_output_stream_get_status (surface->output);
+}
+
+static void
+_cairo_pdf_source_surface_entry_pluck (void *entry, void *closure)
+{
+ cairo_pdf_source_surface_entry_t *surface_entry = entry;
+ cairo_hash_table_t *patterns = closure;
+
+ _cairo_hash_table_remove (patterns, &surface_entry->base);
+ free (surface_entry->unique_id);
+
+ free (surface_entry);
+}
+
+static cairo_status_t
+_cairo_pdf_surface_finish (void *abstract_surface)
+{
+ cairo_pdf_surface_t *surface = abstract_surface;
+ long offset;
+ cairo_pdf_resource_t info, catalog;
+ cairo_status_t status, status2;
+ int size, i;
+ cairo_pdf_jbig2_global_t *global;
+
+ status = surface->base.status;
+ if (status == CAIRO_STATUS_SUCCESS)
+ status = _cairo_pdf_surface_emit_font_subsets (surface);
+
+ _cairo_pdf_surface_write_pages (surface);
+
+ info = _cairo_pdf_surface_write_info (surface);
+ if (info.id == 0 && status == CAIRO_STATUS_SUCCESS)
+ status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
+
+ catalog = _cairo_pdf_surface_write_catalog (surface);
+ if (catalog.id == 0 && status == CAIRO_STATUS_SUCCESS)
+ status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
+
+ offset = _cairo_pdf_surface_write_xref (surface);
+
+ _cairo_output_stream_printf (surface->output,
+ "trailer\n"
+ "<< /Size %d\n"
+ " /Root %d 0 R\n"
+ " /Info %d 0 R\n"
+ ">>\n",
+ surface->next_available_resource.id,
+ catalog.id,
+ info.id);
+
+ _cairo_output_stream_printf (surface->output,
+ "startxref\n"
+ "%ld\n"
+ "%%%%EOF\n",
+ offset);
+
+ /* pdf_operators has already been flushed when the last stream was
+ * closed so we should never be writing anything here - however,
+ * the stream may itself be in an error state. */
+ status2 = _cairo_pdf_operators_fini (&surface->pdf_operators);
+ if (status == CAIRO_STATUS_SUCCESS)
+ status = status2;
+
+ /* close any active streams still open due to fatal errors */
+ status2 = _cairo_pdf_surface_close_stream (surface);
+ if (status == CAIRO_STATUS_SUCCESS)
+ status = status2;
+
+ if (surface->group_stream.stream != NULL) {
+ status2 = _cairo_output_stream_destroy (surface->group_stream.stream);
+ if (status == CAIRO_STATUS_SUCCESS)
+ status = status2;
+ }
+ if (surface->group_stream.mem_stream != NULL) {
+ status2 = _cairo_output_stream_destroy (surface->group_stream.mem_stream);
+ if (status == CAIRO_STATUS_SUCCESS)
+ status = status2;
+ }
+ if (surface->pdf_stream.active)
+ surface->output = surface->pdf_stream.old_output;
+ if (surface->group_stream.active)
+ surface->output = surface->group_stream.old_output;
+
+ /* and finish the pdf surface */
+ status2 = _cairo_output_stream_destroy (surface->output);
+ if (status == CAIRO_STATUS_SUCCESS)
+ status = status2;
+
+ _cairo_pdf_surface_clear (surface);
+ _cairo_pdf_group_resources_fini (&surface->resources);
+
+ _cairo_array_fini (&surface->objects);
+ _cairo_array_fini (&surface->pages);
+ _cairo_array_fini (&surface->rgb_linear_functions);
+ _cairo_array_fini (&surface->alpha_linear_functions);
+ _cairo_array_fini (&surface->page_patterns);
+ _cairo_array_fini (&surface->page_surfaces);
+ _cairo_hash_table_foreach (surface->all_surfaces,
+ _cairo_pdf_source_surface_entry_pluck,
+ surface->all_surfaces);
+ _cairo_hash_table_destroy (surface->all_surfaces);
+ _cairo_array_fini (&surface->smask_groups);
+ _cairo_array_fini (&surface->fonts);
+ _cairo_array_fini (&surface->knockout_group);
+
+ if (surface->font_subsets) {
+ _cairo_scaled_font_subsets_destroy (surface->font_subsets);
+ surface->font_subsets = NULL;
+ }
+
+ size = _cairo_array_num_elements (&surface->jbig2_global);
+ for (i = 0; i < size; i++) {
+ global = (cairo_pdf_jbig2_global_t *) _cairo_array_index (&surface->jbig2_global, i);
+ free(global->id);
+ if (!global->emitted)
+ return _cairo_error (CAIRO_STATUS_JBIG2_GLOBAL_MISSING);
+ }
+ _cairo_array_fini (&surface->jbig2_global);
+
+ _cairo_array_truncate (&surface->page_surfaces, 0);
+
+ _cairo_surface_clipper_reset (&surface->clipper);
+
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_start_page (void *abstract_surface)
+{
+ cairo_pdf_surface_t *surface = abstract_surface;
+
+ /* Document header */
+ if (! surface->header_emitted) {
+ const char *version;
+
+ switch (surface->pdf_version) {
+ case CAIRO_PDF_VERSION_1_4:
+ version = "1.4";
+ break;
+ default:
+ case CAIRO_PDF_VERSION_1_5:
+ version = "1.5";
+ break;
+ }
+
+ _cairo_output_stream_printf (surface->output,
+ "%%PDF-%s\n", version);
+ _cairo_output_stream_printf (surface->output,
+ "%%%c%c%c%c\n", 181, 237, 174, 251);
+ surface->header_emitted = TRUE;
+ }
+
+ _cairo_pdf_group_resources_clear (&surface->resources);
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_has_fallback_images (void *abstract_surface,
+ cairo_bool_t has_fallbacks)
+{
+ cairo_int_status_t status;
+ cairo_pdf_surface_t *surface = abstract_surface;
+ cairo_box_double_t bbox;
+
+ surface->has_fallback_images = has_fallbacks;
+ bbox.p1.x = 0;
+ bbox.p1.y = 0;
+ bbox.p2.x = surface->width;
+ bbox.p2.y = surface->height;
+ status = _cairo_pdf_surface_open_content_stream (surface, &bbox, NULL, has_fallbacks, has_fallbacks);
+ if (unlikely (status))
+ return status;
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_bool_t
+_cairo_pdf_surface_supports_fine_grained_fallbacks (void *abstract_surface)
+{
+ return TRUE;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_add_padded_image_surface (cairo_pdf_surface_t *surface,
+ const cairo_pattern_t *source,
+ const cairo_rectangle_int_t *extents,
+ cairo_pdf_resource_t *surface_res,
+ int *width,
+ int *height,
+ double *x_offset,
+ double *y_offset)
+{
+ cairo_image_surface_t *image;
+ cairo_surface_t *pad_image;
+ void *image_extra;
+ cairo_int_status_t status;
+ int w, h;
+ cairo_rectangle_int_t extents2;
+ cairo_box_t box;
+ cairo_rectangle_int_t rect;
+ cairo_surface_pattern_t pad_pattern;
+
+ status = _cairo_pdf_surface_acquire_source_image_from_pattern (surface, source,
+ &image, &image_extra);
+ if (unlikely (status))
+ return status;
+
+ pad_image = &image->base;
+
+ /* get the operation extents in pattern space */
+ _cairo_box_from_rectangle (&box, extents);
+ _cairo_matrix_transform_bounding_box_fixed (&source->matrix, &box, NULL);
+ _cairo_box_round_to_rectangle (&box, &rect);
+
+ /* Check if image needs padding to fill extents */
+ w = image->width;
+ h = image->height;
+ if (_cairo_fixed_integer_ceil(box.p1.x) < 0 ||
+ _cairo_fixed_integer_ceil(box.p1.y) < 0 ||
+ _cairo_fixed_integer_floor(box.p2.x) > w ||
+ _cairo_fixed_integer_floor(box.p2.y) > h)
+ {
+ pad_image = _cairo_image_surface_create_with_content (image->base.content,
+ rect.width,
+ rect.height);
+ if (pad_image->status) {
+ status = pad_image->status;
+ goto BAIL;
+ }
+
+ _cairo_pattern_init_for_surface (&pad_pattern, &image->base);
+ cairo_matrix_init_translate (&pad_pattern.base.matrix, rect.x, rect.y);
+ pad_pattern.base.extend = CAIRO_EXTEND_PAD;
+ status = _cairo_surface_paint (pad_image,
+ CAIRO_OPERATOR_SOURCE, &pad_pattern.base,
+ NULL);
+ _cairo_pattern_fini (&pad_pattern.base);
+ if (unlikely (status))
+ goto BAIL;
+ }
+
+ status = _cairo_pdf_surface_add_source_surface (surface,
+ pad_image,
+ NULL,
+ FALSE,
+ source->filter,
+ FALSE,
+ FALSE,
+ extents,
+ NULL,
+ surface_res,
+ width,
+ height,
+ x_offset,
+ y_offset,
+ &extents2);
+ if (unlikely (status))
+ goto BAIL;
+
+ if (pad_image != &image->base) {
+ /* If using a padded image, replace _add_source_surface
+ * x/y_offset with padded image offset. Note:
+ * _add_source_surface only sets a non zero x/y_offset for
+ * RASTER_SOURCE patterns. _add_source_surface will always set
+ * x/y_offset to 0 for surfaces so we can ignore the returned
+ * offset and replace it with the offset required for the
+ * padded image */
+ *x_offset = rect.x;
+ *y_offset = rect.y;
+ }
+
+BAIL:
+ if (pad_image != &image->base)
+ cairo_surface_destroy (pad_image);
+
+ _cairo_pdf_surface_release_source_image_from_pattern (surface, source, image, image_extra);
+
+ return status;
+}
+
+/* Emit alpha channel from the image into stream_res.
+ */
+static cairo_int_status_t
+_cairo_pdf_surface_emit_smask (cairo_pdf_surface_t *surface,
+ cairo_image_surface_t *image,
+ cairo_bool_t stencil_mask,
+ cairo_bool_t interpolate,
+ cairo_pdf_resource_t *stream_res)
+{
+ cairo_int_status_t status = CAIRO_STATUS_SUCCESS;
+ char *alpha;
+ unsigned long alpha_size;
+ uint32_t *pixel32;
+ uint8_t *pixel8;
+ int i, x, y, bit, a;
+ cairo_image_transparency_t transparency;
+
+ /* This is the only image format we support, which simplifies things. */
+ assert (image->format == CAIRO_FORMAT_ARGB32 ||
+ image->format == CAIRO_FORMAT_RGB24 ||
+ image->format == CAIRO_FORMAT_A8 ||
+ image->format == CAIRO_FORMAT_A1 );
+
+ transparency = _cairo_image_analyze_transparency (image);
+ if (stencil_mask) {
+ assert (transparency == CAIRO_IMAGE_IS_OPAQUE ||
+ transparency == CAIRO_IMAGE_HAS_BILEVEL_ALPHA);
+ } else {
+ assert (transparency != CAIRO_IMAGE_IS_OPAQUE);
+ }
+
+ if (transparency == CAIRO_IMAGE_HAS_BILEVEL_ALPHA || transparency == CAIRO_IMAGE_IS_OPAQUE) {
+ alpha_size = (image->width + 7) / 8 * image->height;
+ alpha = _cairo_malloc_ab ((image->width+7) / 8, image->height);
+ } else {
+ alpha_size = image->height * image->width;
+ alpha = _cairo_malloc_ab (image->height, image->width);
+ }
+
+ if (unlikely (alpha == NULL)) {
+ status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ goto CLEANUP;
+ }
+
+ i = 0;
+ for (y = 0; y < image->height; y++) {
+ if (transparency == CAIRO_IMAGE_IS_OPAQUE) {
+ for (x = 0; x < (image->width + 7) / 8; x++)
+ alpha[i++] = 0xff;
+ } else if (image->format == CAIRO_FORMAT_A1) {
+ pixel8 = (uint8_t *) (image->data + y * image->stride);
+
+ for (x = 0; x < (image->width + 7) / 8; x++, pixel8++) {
+ a = *pixel8;
+ a = CAIRO_BITSWAP8_IF_LITTLE_ENDIAN (a);
+ alpha[i++] = a;
+ }
+ } else {
+ pixel8 = (uint8_t *) (image->data + y * image->stride);
+ pixel32 = (uint32_t *) (image->data + y * image->stride);
+ bit = 7;
+ for (x = 0; x < image->width; x++) {
+ if (image->format == CAIRO_FORMAT_ARGB32) {
+ a = (*pixel32 & 0xff000000) >> 24;
+ pixel32++;
+ } else {
+ a = *pixel8;
+ pixel8++;
+ }
+
+ if (transparency == CAIRO_IMAGE_HAS_ALPHA) {
+ alpha[i++] = a;
+ } else { /* transparency == CAIRO_IMAGE_HAS_BILEVEL_ALPHA or CAIRO_IMAGE_IS_OPAQUE */
+ if (bit == 7)
+ alpha[i] = 0;
+ if (a != 0)
+ alpha[i] |= (1 << bit);
+ bit--;
+ if (bit < 0) {
+ bit = 7;
+ i++;
+ }
+ }
+ }
+ if (bit != 7)
+ i++;
+ }
+ }
+
+ if (stencil_mask) {
+ status = _cairo_pdf_surface_open_stream (surface,
+ stream_res,
+ TRUE,
+ " /Type /XObject\n"
+ " /Subtype /Image\n"
+ " /ImageMask true\n"
+ " /Width %d\n"
+ " /Height %d\n"
+ " /Interpolate %s\n"
+ " /BitsPerComponent 1\n"
+ " /Decode [1 0]\n",
+ image->width, image->height,
+ interpolate ? "true" : "false");
+ } else {
+ status = _cairo_pdf_surface_open_stream (surface,
+ stream_res,
+ TRUE,
+ " /Type /XObject\n"
+ " /Subtype /Image\n"
+ " /Width %d\n"
+ " /Height %d\n"
+ " /ColorSpace /DeviceGray\n"
+ " /Interpolate %s\n"
+ " /BitsPerComponent %d\n",
+ image->width, image->height,
+ interpolate ? "true" : "false",
+ transparency == CAIRO_IMAGE_HAS_ALPHA ? 8 : 1);
+ }
+ if (unlikely (status))
+ goto CLEANUP_ALPHA;
+
+ _cairo_output_stream_write (surface->output, alpha, alpha_size);
+ status = _cairo_pdf_surface_close_stream (surface);
+
+ CLEANUP_ALPHA:
+ free (alpha);
+ CLEANUP:
+ return status;
+}
+
+/**
+ * _cairo_pdf_surface_emit_image:
+ * @surface: the pdf surface
+ * @image_surf: The image to write
+ * @surface_entry: Contains image resource, smask resource, interpolate and stencil mask parameters.
+ *
+ * Emit an image stream using the @image_res resource and write out
+ * the image data from @image_surf. If @smask_res is not null, @smask_res will
+ * be specified as the smask for the image. Otherwise emit the an smask if
+ * the image is requires one.
+ **/
+static cairo_int_status_t
+_cairo_pdf_surface_emit_image (cairo_pdf_surface_t *surface,
+ cairo_image_surface_t *image_surf,
+ cairo_pdf_source_surface_entry_t *surface_entry)
+{
+ cairo_int_status_t status = CAIRO_STATUS_SUCCESS;
+ char *data;
+ unsigned long data_size;
+ uint32_t *pixel;
+ int i, x, y, bit;
+ cairo_pdf_resource_t smask = {0}; /* squelch bogus compiler warning */
+ cairo_bool_t need_smask;
+ cairo_image_color_t color;
+ cairo_image_surface_t *image;
+ cairo_image_transparency_t transparency;
+ char smask_buf[30];
+
+ image = image_surf;
+ if (image->format != CAIRO_FORMAT_RGB24 &&
+ image->format != CAIRO_FORMAT_ARGB32 &&
+ image->format != CAIRO_FORMAT_A8 &&
+ image->format != CAIRO_FORMAT_A1)
+ {
+ cairo_surface_t *surf;
+ cairo_surface_pattern_t pattern;
+
+ surf = _cairo_image_surface_create_with_content (image_surf->base.content,
+ image_surf->width,
+ image_surf->height);
+ image = (cairo_image_surface_t *) surf;
+ if (surf->status) {
+ status = surf->status;
+ goto CLEANUP;
+ }
+
+ _cairo_pattern_init_for_surface (&pattern, &image_surf->base);
+ status = _cairo_surface_paint (surf,
+ CAIRO_OPERATOR_SOURCE, &pattern.base,
+ NULL);
+ _cairo_pattern_fini (&pattern.base);
+ if (unlikely (status))
+ goto CLEANUP;
+ }
+
+ if (surface_entry->smask || surface_entry->stencil_mask) {
+ return _cairo_pdf_surface_emit_smask (surface, image,
+ surface_entry->stencil_mask,
+ surface_entry->interpolate,
+ &surface_entry->surface_res);
+ }
+
+ color = _cairo_image_analyze_color (image);
+ switch (color) {
+ default:
+ case CAIRO_IMAGE_UNKNOWN_COLOR:
+ ASSERT_NOT_REACHED;
+ case CAIRO_IMAGE_IS_COLOR:
+ data_size = image->height * image->width * 3;
+ data = _cairo_malloc_abc (image->width, image->height, 3);
+ break;
+
+ case CAIRO_IMAGE_IS_GRAYSCALE:
+ data_size = image->height * image->width;
+ data = _cairo_malloc_ab (image->width, image->height);
+ break;
+ case CAIRO_IMAGE_IS_MONOCHROME:
+ data_size = (image->width + 7) / 8 * image->height;
+ data = _cairo_malloc_ab ((image->width+7) / 8, image->height);
+ break;
+ }
+ if (unlikely (data == NULL)) {
+ status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ goto CLEANUP;
+ }
+
+ i = 0;
+ for (y = 0; y < image->height; y++) {
+ pixel = (uint32_t *) (image->data + y * image->stride);
+
+ bit = 7;
+ for (x = 0; x < image->width; x++, pixel++) {
+ int r, g, b;
+
+ /* XXX: We're un-premultiplying alpha here. My reading of the PDF
+ * specification suggests that we should be able to avoid having
+ * to do this by filling in the SMask's Matte dictionary
+ * appropriately, but my attempts to do that so far have
+ * failed. */
+ if (image->format == CAIRO_FORMAT_ARGB32) {
+ uint8_t a;
+ a = (*pixel & 0xff000000) >> 24;
+ if (a == 0) {
+ r = g = b = 0;
+ } else {
+ r = (((*pixel & 0xff0000) >> 16) * 255 + a / 2) / a;
+ g = (((*pixel & 0x00ff00) >> 8) * 255 + a / 2) / a;
+ b = (((*pixel & 0x0000ff) >> 0) * 255 + a / 2) / a;
+ }
+ } else if (image->format == CAIRO_FORMAT_RGB24) {
+ r = (*pixel & 0x00ff0000) >> 16;
+ g = (*pixel & 0x0000ff00) >> 8;
+ b = (*pixel & 0x000000ff) >> 0;
+ } else {
+ r = g = b = 0;
+ }
+
+ switch (color) {
+ case CAIRO_IMAGE_IS_COLOR:
+ case CAIRO_IMAGE_UNKNOWN_COLOR:
+ data[i++] = r;
+ data[i++] = g;
+ data[i++] = b;
+ break;
+
+ case CAIRO_IMAGE_IS_GRAYSCALE:
+ data[i++] = r;
+ break;
+
+ case CAIRO_IMAGE_IS_MONOCHROME:
+ if (bit == 7)
+ data[i] = 0;
+ if (r != 0)
+ data[i] |= (1 << bit);
+ bit--;
+ if (bit < 0) {
+ bit = 7;
+ i++;
+ }
+ break;
+ }
+ }
+ if (bit != 7)
+ i++;
+ }
+
+ if (surface_entry->smask_res.id != 0) {
+ need_smask = TRUE;
+ smask = surface_entry->smask_res;
+ } else {
+ need_smask = FALSE;
+ if (image->format == CAIRO_FORMAT_ARGB32 ||
+ image->format == CAIRO_FORMAT_A8 ||
+ image->format == CAIRO_FORMAT_A1)
+ {
+ transparency = _cairo_image_analyze_transparency (image);
+ if (transparency != CAIRO_IMAGE_IS_OPAQUE) {
+ need_smask = TRUE;
+ smask = _cairo_pdf_surface_new_object (surface);
+ if (smask.id == 0) {
+ status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ goto CLEANUP_RGB;
+ }
+
+ status = _cairo_pdf_surface_emit_smask (surface, image, FALSE, surface_entry->interpolate, &smask);
+ if (unlikely (status))
+ goto CLEANUP_RGB;
+ }
+ }
+ }
+
+ if (need_smask)
+ snprintf(smask_buf, sizeof(smask_buf), " /SMask %d 0 R\n", smask.id);
+ else
+ smask_buf[0] = 0;
+
+ status = _cairo_pdf_surface_open_stream (surface,
+ &surface_entry->surface_res,
+ TRUE,
+ " /Type /XObject\n"
+ " /Subtype /Image\n"
+ " /Width %d\n"
+ " /Height %d\n"
+ " /ColorSpace %s\n"
+ " /Interpolate %s\n"
+ " /BitsPerComponent %d\n"
+ "%s",
+ image->width,
+ image->height,
+ color == CAIRO_IMAGE_IS_COLOR ? "/DeviceRGB" : "/DeviceGray",
+ surface_entry->interpolate ? "true" : "false",
+ color == CAIRO_IMAGE_IS_MONOCHROME? 1 : 8,
+ smask_buf);
+ if (unlikely (status))
+ goto CLEANUP_RGB;
+
+#undef IMAGE_DICTIONARY
+
+ _cairo_output_stream_write (surface->output, data, data_size);
+ status = _cairo_pdf_surface_close_stream (surface);
+
+CLEANUP_RGB:
+ free (data);
+CLEANUP:
+ if (image != image_surf)
+ cairo_surface_destroy (&image->base);
+
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_lookup_jbig2_global (cairo_pdf_surface_t *surface,
+ const unsigned char *global_id,
+ unsigned long global_id_length,
+ cairo_pdf_jbig2_global_t **entry)
+{
+ cairo_pdf_jbig2_global_t global;
+ int size, i;
+ cairo_int_status_t status;
+
+ size = _cairo_array_num_elements (&surface->jbig2_global);
+ for (i = 0; i < size; i++) {
+ *entry = (cairo_pdf_jbig2_global_t *) _cairo_array_index (&surface->jbig2_global, i);
+ if ((*entry)->id && global_id && (*entry)->id_length == global_id_length
+ && memcmp((*entry)->id, global_id, global_id_length) == 0) {
+ return CAIRO_STATUS_SUCCESS;
+ }
+ }
+
+ global.id = malloc(global_id_length);
+ if (unlikely (global.id == NULL)) {
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ }
+
+ memcpy (global.id, global_id, global_id_length);
+ global.id_length = global_id_length;
+ global.res = _cairo_pdf_surface_new_object (surface);
+ if (global.res.id == 0) {
+ free(global.id);
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ }
+
+ global.emitted = FALSE;
+ status = _cairo_array_append (&surface->jbig2_global, &global);
+ if (unlikely(status))
+ return status;
+
+ size = _cairo_array_num_elements (&surface->jbig2_global);
+ *entry = (cairo_pdf_jbig2_global_t *) _cairo_array_index (&surface->jbig2_global, size - 1);
+ return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_emit_jbig2_image (cairo_pdf_surface_t *surface,
+ cairo_surface_t *source,
+ cairo_pdf_source_surface_entry_t *surface_entry)
+{
+ cairo_int_status_t status;
+ const unsigned char *mime_data;
+ unsigned long mime_data_length;
+ cairo_image_info_t info;
+ const unsigned char *global_id;
+ unsigned long global_id_length;
+ const unsigned char *global_data;
+ unsigned long global_data_length;
+ cairo_pdf_jbig2_global_t *global_entry = NULL; /* hide compiler warning */
+ char smask_buf[30];
+ char decode_parms_buf[100];
+
+ cairo_surface_get_mime_data (source, CAIRO_MIME_TYPE_JBIG2,
+ &mime_data, &mime_data_length);
+ if (mime_data == NULL)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ status = _cairo_image_info_get_jbig2_info (&info, mime_data, mime_data_length);
+ if (status)
+ return status;
+
+ cairo_surface_get_mime_data (source, CAIRO_MIME_TYPE_JBIG2_GLOBAL_ID,
+ &global_id, &global_id_length);
+ if (global_id && global_id_length > 0) {
+ status = _cairo_pdf_surface_lookup_jbig2_global (surface, global_id, global_id_length, &global_entry);
+ if (unlikely(status))
+ return status;
+
+ if (!global_entry->emitted) {
+ cairo_surface_get_mime_data (source, CAIRO_MIME_TYPE_JBIG2_GLOBAL,
+ &global_data, &global_data_length);
+ if (global_data) {
+ status = _cairo_pdf_surface_open_stream (surface, &global_entry->res, FALSE, NULL);
+ if (unlikely(status))
+ return status;
+
+ _cairo_output_stream_write (surface->output, global_data, global_data_length);
+ status = _cairo_pdf_surface_close_stream (surface);
+ if (unlikely(status))
+ return status;
+
+ global_entry->emitted = TRUE;
+ }
+ }
+
+ snprintf(decode_parms_buf, sizeof(decode_parms_buf),
+ " /DecodeParms << /JBIG2Globals %d 0 R >>\n", global_entry->res.id);
+ } else {
+ decode_parms_buf[0] = 0;
+ }
+
+ if (surface_entry->smask_res.id)
+ snprintf(smask_buf, sizeof(smask_buf), " /SMask %d 0 R\n", surface_entry->smask_res.id);
+ else
+ smask_buf[0] = 0;
+
+ if (surface_entry->stencil_mask) {
+ status = _cairo_pdf_surface_open_stream (surface,
+ &surface_entry->surface_res,
+ FALSE,
+ " /Type /XObject\n"
+ " /Subtype /Image\n"
+ " /ImageMask true\n"
+ " /Width %d\n"
+ " /Height %d\n"
+ " /Interpolate %s\n"
+ " /BitsPerComponent 1\n"
+ " /Decode [1 0]\n"
+ " /Filter /JPXDecode\n"
+ "%s",
+ info.width,
+ info.height,
+ surface_entry->interpolate ? "true" : "false",
+ decode_parms_buf);
+ } else {
+ status = _cairo_pdf_surface_open_stream (surface,
+ &surface_entry->surface_res,
+ FALSE,
+ " /Type /XObject\n"
+ " /Subtype /Image\n"
+ " /Width %d\n"
+ " /Height %d\n"
+ " /ColorSpace /DeviceGray\n"
+ " /BitsPerComponent 1\n"
+ " /Interpolate %s\n"
+ "%s"
+ " /Filter /JBIG2Decode\n"
+ "%s",
+ info.width,
+ info.height,
+ surface_entry->interpolate ? "true" : "false",
+ smask_buf,
+ decode_parms_buf);
+ }
+ if (unlikely(status))
+ return status;
+
+ _cairo_output_stream_write (surface->output, mime_data, mime_data_length);
+ status = _cairo_pdf_surface_close_stream (surface);
+
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_emit_jpx_image (cairo_pdf_surface_t *surface,
+ cairo_surface_t *source,
+ cairo_pdf_source_surface_entry_t *surface_entry)
+{
+ cairo_int_status_t status;
+ const unsigned char *mime_data;
+ unsigned long mime_data_length;
+ cairo_image_info_t info;
+ char smask_buf[30];
+
+ if (surface->pdf_version < CAIRO_PDF_VERSION_1_5)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ cairo_surface_get_mime_data (source, CAIRO_MIME_TYPE_JP2,
+ &mime_data, &mime_data_length);
+ if (mime_data == NULL)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ status = _cairo_image_info_get_jpx_info (&info, mime_data, mime_data_length);
+ if (status)
+ return status;
+
+ if ((surface_entry->smask || surface_entry->stencil_mask) && info.num_components != 1)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ if ((surface_entry->stencil_mask) && info.bits_per_component != 1)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ if (surface_entry->smask_res.id)
+ snprintf(smask_buf, sizeof(smask_buf), " /SMask %d 0 R\n", surface_entry->smask_res.id);
+ else
+ smask_buf[0] = 0;
+
+ if (surface_entry->stencil_mask) {
+ status = _cairo_pdf_surface_open_stream (surface,
+ &surface_entry->surface_res,
+ FALSE,
+ " /Type /XObject\n"
+ " /Subtype /Image\n"
+ " /ImageMask true\n"
+ " /Width %d\n"
+ " /Height %d\n"
+ " /Interpolate %s\n"
+ " /BitsPerComponent 1\n"
+ " /Decode [1 0]\n"
+ " /Filter /JPXDecode\n",
+ info.width,
+ info.height,
+ surface_entry->interpolate ? "true" : "false");
+ } else {
+ status = _cairo_pdf_surface_open_stream (surface,
+ &surface_entry->surface_res,
+ FALSE,
+ " /Type /XObject\n"
+ " /Subtype /Image\n"
+ " /Width %d\n"
+ " /Height %d\n"
+ " /Interpolate %s\n"
+ "%s"
+ " /Filter /JPXDecode\n",
+ info.width,
+ info.height,
+ surface_entry->interpolate ? "true" : "false",
+ smask_buf);
+ }
+ if (status)
+ return status;
+
+ _cairo_output_stream_write (surface->output, mime_data, mime_data_length);
+ status = _cairo_pdf_surface_close_stream (surface);
+
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_emit_jpeg_image (cairo_pdf_surface_t *surface,
+ cairo_surface_t *source,
+ cairo_pdf_source_surface_entry_t *surface_entry)
+{
+ cairo_int_status_t status;
+ const unsigned char *mime_data;
+ unsigned long mime_data_length;
+ cairo_image_info_t info;
+ const char *colorspace;
+ char smask_buf[30];
+
+ cairo_surface_get_mime_data (source, CAIRO_MIME_TYPE_JPEG,
+ &mime_data, &mime_data_length);
+ if (unlikely (source->status))
+ return source->status;
+ if (mime_data == NULL)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ status = _cairo_image_info_get_jpeg_info (&info, mime_data, mime_data_length);
+ if (unlikely (status))
+ return status;
+
+ if ((surface_entry->smask || surface_entry->stencil_mask) && info.num_components != 1)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ if ((surface_entry->stencil_mask) && info.bits_per_component != 1)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ switch (info.num_components) {
+ case 1:
+ colorspace = "/DeviceGray";
+ break;
+ case 3:
+ colorspace = "/DeviceRGB";
+ break;
+ case 4:
+ colorspace = "/DeviceCMYK";
+ break;
+ default:
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+ }
+
+ if (surface_entry->smask_res.id)
+ snprintf(smask_buf, sizeof(smask_buf), " /SMask %d 0 R\n", surface_entry->smask_res.id);
+ else
+ smask_buf[0] = 0;
+
+ if (surface_entry->stencil_mask) {
+ status = _cairo_pdf_surface_open_stream (surface,
+ &surface_entry->surface_res,
+ FALSE,
+ " /Type /XObject\n"
+ " /Subtype /Image\n"
+ " /ImageMask true\n"
+ " /Width %d\n"
+ " /Height %d\n"
+ " /Interpolate %s\n"
+ " /BitsPerComponent 1\n"
+ " /Decode [1 0]\n"
+ " /Filter /DCTDecode\n",
+ info.width,
+ info.height,
+ surface_entry->interpolate ? "true" : "false");
+ } else {
+ status = _cairo_pdf_surface_open_stream (surface,
+ &surface_entry->surface_res,
+ FALSE,
+ " /Type /XObject\n"
+ " /Subtype /Image\n"
+ " /Width %d\n"
+ " /Height %d\n"
+ " /ColorSpace %s\n"
+ " /Interpolate %s\n"
+ " /BitsPerComponent %d\n"
+ "%s"
+ " /Filter /DCTDecode\n",
+ info.width,
+ info.height,
+ colorspace,
+ surface_entry->interpolate ? "true" : "false",
+ info.bits_per_component,
+ smask_buf);
+ }
+ if (unlikely (status))
+ return status;
+
+ _cairo_output_stream_write (surface->output, mime_data, mime_data_length);
+ status = _cairo_pdf_surface_close_stream (surface);
+
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_emit_image_surface (cairo_pdf_surface_t *surface,
+ cairo_pdf_source_surface_t *source)
+{
+ cairo_image_surface_t *image;
+ void *image_extra;
+ cairo_int_status_t status;
+
+ if (source->type == CAIRO_PATTERN_TYPE_SURFACE) {
+ status = _cairo_pdf_surface_emit_jbig2_image (surface, source->surface, source->hash_entry);
+ if (status != CAIRO_INT_STATUS_UNSUPPORTED)
+ return status;
+
+ status = _cairo_pdf_surface_emit_jpx_image (surface, source->surface, source->hash_entry);
+ if (status != CAIRO_INT_STATUS_UNSUPPORTED)
+ return status;
+
+ status = _cairo_pdf_surface_emit_jpeg_image (surface, source->surface, source->hash_entry);
+ if (status != CAIRO_INT_STATUS_UNSUPPORTED)
+ return status;
+ }
+
+ if (source->type == CAIRO_PATTERN_TYPE_SURFACE) {
+ status = _cairo_surface_acquire_source_image (source->surface, &image, &image_extra);
+ } else {
+ status = _cairo_pdf_surface_acquire_source_image_from_pattern (surface, source->raster_pattern,
+ &image, &image_extra);
+ }
+ if (unlikely (status))
+ return status;
+
+ status = _cairo_pdf_surface_emit_image (surface,
+ image,
+ source->hash_entry);
+
+ if (source->type == CAIRO_PATTERN_TYPE_SURFACE)
+ _cairo_surface_release_source_image (source->surface, image, image_extra);
+ else
+ _cairo_pdf_surface_release_source_image_from_pattern (surface, source->raster_pattern,
+ image, image_extra);
+
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_emit_recording_surface (cairo_pdf_surface_t *surface,
+ cairo_pdf_source_surface_t *pdf_source)
+{
+ double old_width, old_height;
+ cairo_paginated_mode_t old_paginated_mode;
+ cairo_surface_clipper_t old_clipper;
+ cairo_box_double_t bbox;
+ cairo_int_status_t status;
+ int alpha = 0;
+ cairo_surface_t *free_me = NULL;
+ cairo_surface_t *source;
+ const cairo_rectangle_int_t *extents;
+ int width;
+ int height;
+ cairo_bool_t is_subsurface;
+ cairo_bool_t transparency_group;
+ cairo_recording_surface_t *recording;
+
+ assert (pdf_source->type == CAIRO_PATTERN_TYPE_SURFACE);
+ extents = &pdf_source->hash_entry->extents;
+ width = pdf_source->hash_entry->width;
+ height = pdf_source->hash_entry->height;
+ is_subsurface = FALSE;
+ source = pdf_source->surface;
+ if (_cairo_surface_is_snapshot (source)) {
+ free_me = source = _cairo_surface_snapshot_get_target (source);
+ } else if (source->backend->type == CAIRO_SURFACE_TYPE_SUBSURFACE) {
+ cairo_surface_subsurface_t *sub = (cairo_surface_subsurface_t *) source;
+
+ source = sub->target;
+ extents = &sub->extents;
+ width = extents->width;
+ height = extents->height;
+ is_subsurface = TRUE;
+ }
+
+ assert (source->type == CAIRO_SURFACE_TYPE_RECORDING);
+ recording = (cairo_recording_surface_t *) source;
+
+ old_width = surface->width;
+ old_height = surface->height;
+ old_paginated_mode = surface->paginated_mode;
+ old_clipper = surface->clipper;
+ _cairo_surface_clipper_init (&surface->clipper,
+ _cairo_pdf_surface_clipper_intersect_clip_path);
+
+ _cairo_pdf_surface_set_size_internal (surface, width, height);
+
+ /* Patterns are emitted after fallback images. The paginated mode
+ * needs to be set to _RENDER while the recording surface is replayed
+ * back to this surface.
+ */
+ surface->paginated_mode = CAIRO_PAGINATED_MODE_RENDER;
+ _cairo_pdf_group_resources_clear (&surface->resources);
+ _get_bbox_from_extents (height, extents, &bbox);
+
+ /* We can optimize away the transparency group allowing the viewer
+ * to replay the group in place when all operators are OVER and the
+ * recording contains only opaque and/or clear alpha.
+ */
+ transparency_group = !(pdf_source->hash_entry->operator == CAIRO_OPERATOR_OVER &&
+ _cairo_recording_surface_has_only_bilevel_alpha (recording) &&
+ _cairo_recording_surface_has_only_op_over (recording));
+ status = _cairo_pdf_surface_open_content_stream (surface, &bbox, &pdf_source->hash_entry->surface_res,
+ TRUE, transparency_group);
+ if (unlikely (status))
+ goto err;
+
+ if (source->content == CAIRO_CONTENT_COLOR) {
+ status = _cairo_pdf_surface_add_alpha (surface, 1.0, &alpha);
+ if (unlikely (status))
+ goto err;
+
+ _cairo_output_stream_printf (surface->output,
+ "q /a%d gs 0 0 0 rg 0 0 %f %f re f Q\n",
+ alpha,
+ surface->width,
+ surface->height);
+ }
+
+ status = _cairo_recording_surface_replay_region (source,
+ is_subsurface ? extents : NULL,
+ &surface->base,
+ CAIRO_RECORDING_REGION_NATIVE);
+ assert (status != CAIRO_INT_STATUS_UNSUPPORTED);
+ if (unlikely (status))
+ goto err;
+
+ status = _cairo_pdf_surface_close_content_stream (surface);
+
+ _cairo_surface_clipper_reset (&surface->clipper);
+ surface->clipper = old_clipper;
+ _cairo_pdf_surface_set_size_internal (surface,
+ old_width,
+ old_height);
+ surface->paginated_mode = old_paginated_mode;
+
+err:
+ cairo_surface_destroy (free_me);
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_emit_surface (cairo_pdf_surface_t *surface,
+ cairo_pdf_source_surface_t *src_surface)
+{
+ if (src_surface->type == CAIRO_PATTERN_TYPE_SURFACE &&
+ src_surface->surface->type == CAIRO_SURFACE_TYPE_RECORDING)
+ return _cairo_pdf_surface_emit_recording_surface (surface, src_surface);
+
+ return _cairo_pdf_surface_emit_image_surface (surface, src_surface);
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_emit_surface_pattern (cairo_pdf_surface_t *surface,
+ cairo_pdf_pattern_t *pdf_pattern)
+{
+ cairo_pattern_t *pattern = pdf_pattern->pattern;
+ cairo_int_status_t status;
+ cairo_pdf_resource_t pattern_resource = {0};
+ cairo_matrix_t cairo_p2d, pdf_p2d;
+ cairo_extend_t extend = cairo_pattern_get_extend (pattern);
+ double xstep, ystep;
+ cairo_rectangle_int_t pattern_extents;
+ int pattern_width = 0; /* squelch bogus compiler warning */
+ int pattern_height = 0; /* squelch bogus compiler warning */
+ double x_offset;
+ double y_offset;
+ char draw_surface[200];
+ cairo_box_double_t bbox;
+
+ if (pattern->extend == CAIRO_EXTEND_PAD) {
+ status = _cairo_pdf_surface_add_padded_image_surface (surface,
+ pattern,
+ &pdf_pattern->extents,
+ &pattern_resource,
+ &pattern_width,
+ &pattern_height,
+ &x_offset,
+ &y_offset);
+ pattern_extents.x = 0;
+ pattern_extents.y = 0;
+ pattern_extents.width = pattern_width;
+ pattern_extents.height = pattern_height;
+ } else {
+ status = _cairo_pdf_surface_add_source_surface (surface,
+ NULL,
+ pattern,
+ pdf_pattern->operator,
+ pattern->filter,
+ FALSE,
+ FALSE,
+ &pdf_pattern->extents,
+ NULL,
+ &pattern_resource,
+ &pattern_width,
+ &pattern_height,
+ &x_offset,
+ &y_offset,
+ &pattern_extents);
+ }
+ if (unlikely (status))
+ return status;
+
+ switch (extend) {
+ case CAIRO_EXTEND_PAD:
+ case CAIRO_EXTEND_NONE:
+ {
+ /* In PS/PDF, (as far as I can tell), all patterns are
+ * repeating. So we support cairo's EXTEND_NONE semantics
+ * by setting the repeat step size to a size large enough
+ * to guarantee that no more than a single occurrence will
+ * be visible.
+ *
+ * First, map the surface extents into pattern space (since
+ * xstep and ystep are in pattern space). Then use an upper
+ * bound on the length of the diagonal of the pattern image
+ * and the surface as repeat size. This guarantees to never
+ * repeat visibly.
+ */
+ double x1 = 0.0, y1 = 0.0;
+ double x2 = surface->width, y2 = surface->height;
+ _cairo_matrix_transform_bounding_box (&pattern->matrix,
+ &x1, &y1, &x2, &y2,
+ NULL);
+
+ /* Rather than computing precise bounds of the union, just
+ * add the surface extents unconditionally. We only
+ * required an answer that's large enough, we don't really
+ * care if it's not as tight as possible.*/
+ xstep = ystep = ceil ((x2 - x1) + (y2 - y1) +
+ pattern_width + pattern_height);
+ }
+ break;
+ case CAIRO_EXTEND_REPEAT:
+ xstep = pattern_width;
+ ystep = pattern_height;
+ break;
+ case CAIRO_EXTEND_REFLECT:
+ pattern_extents.x = 0;
+ pattern_extents.y = 0;
+ pattern_extents.width = pattern_width*2;
+ pattern_extents.height = pattern_height*2;
+ xstep = pattern_width*2;
+ ystep = pattern_height*2;
+ break;
+ /* All the rest (if any) should have been analyzed away, so this
+ * case should be unreachable. */
+ default:
+ ASSERT_NOT_REACHED;
+ xstep = 0;
+ ystep = 0;
+ }
+
+ /* At this point, (that is, within the surface backend interface),
+ * the pattern's matrix maps from cairo's device space to cairo's
+ * pattern space, (both with their origin at the upper-left, and
+ * cairo's pattern space of size width,height).
+ *
+ * Then, we must emit a PDF pattern object that maps from its own
+ * pattern space, (which has a size that we establish in the BBox
+ * dictionary entry), to the PDF page's *initial* space, (which
+ * does not benefit from the Y-axis flipping matrix that we emit
+ * on each page). So the PDF patterns matrix maps from a
+ * (width,height) pattern space to a device space with the origin
+ * in the lower-left corner.
+ *
+ * So to handle all of that, we start with an identity matrix for
+ * the PDF pattern to device matrix. We translate it up by the
+ * image height then flip it in the Y direction, (moving us from
+ * the PDF origin to cairo's origin). We then multiply in the
+ * inverse of the cairo pattern matrix, (since it maps from device
+ * to pattern, while we're setting up pattern to device). Finally,
+ * we translate back down by the image height and flip again to
+ * end up at the lower-left origin that PDF expects.
+ *
+ * Additionally, within the stream that paints the pattern itself,
+ * we are using a PDF image object that has a size of (1,1) so we
+ * have to scale it up by the image width and height to fill our
+ * pattern cell.
+ */
+ cairo_p2d = pattern->matrix;
+ status = cairo_matrix_invert (&cairo_p2d);
+ /* cairo_pattern_set_matrix ensures the matrix is invertible */
+ assert (status == CAIRO_INT_STATUS_SUCCESS);
+
+ cairo_matrix_multiply (&pdf_p2d, &cairo_p2d, &surface->cairo_to_pdf);
+ cairo_matrix_translate (&pdf_p2d, -x_offset, -y_offset);
+ cairo_matrix_translate (&pdf_p2d, 0.0, pattern_height);
+ cairo_matrix_scale (&pdf_p2d, 1.0, -1.0);
+
+ _get_bbox_from_extents (pattern_height, &pattern_extents, &bbox);
+ _cairo_pdf_surface_update_object (surface, pdf_pattern->pattern_res);
+ status = _cairo_pdf_surface_open_stream (surface,
+ &pdf_pattern->pattern_res,
+ FALSE,
+ " /PatternType 1\n"
+ " /BBox [ %f %f %f %f ]\n"
+ " /XStep %f\n"
+ " /YStep %f\n"
+ " /TilingType 1\n"
+ " /PaintType 1\n"
+ " /Matrix [ %f %f %f %f %f %f ]\n"
+ " /Resources << /XObject << /x%d %d 0 R >> >>\n",
+ bbox.p1.x, bbox.p1.y, bbox.p2.x, bbox.p2.y,
+ xstep, ystep,
+ pdf_p2d.xx, pdf_p2d.yx,
+ pdf_p2d.xy, pdf_p2d.yy,
+ pdf_p2d.x0, pdf_p2d.y0,
+ pattern_resource.id,
+ pattern_resource.id);
+ if (unlikely (status))
+ return status;
+
+ if (pattern->type == CAIRO_PATTERN_TYPE_SURFACE &&
+ ((cairo_surface_pattern_t *) pattern)->surface->type == CAIRO_SURFACE_TYPE_RECORDING) {
+ snprintf(draw_surface,
+ sizeof (draw_surface),
+ "/x%d Do\n",
+ pattern_resource.id);
+ } else {
+ snprintf(draw_surface,
+ sizeof (draw_surface),
+ "q %d 0 0 %d 0 0 cm /x%d Do Q",
+ pattern_width,
+ pattern_height,
+ pattern_resource.id);
+ }
+
+ if (extend == CAIRO_EXTEND_REFLECT) {
+ _cairo_output_stream_printf (surface->output,
+ "q 0 0 %d %d re W n %s Q\n"
+ "q -1 0 0 1 %d 0 cm 0 0 %d %d re W n %s Q\n"
+ "q 1 0 0 -1 0 %d cm 0 0 %d %d re W n %s Q\n"
+ "q -1 0 0 -1 %d %d cm 0 0 %d %d re W n %s Q\n",
+ pattern_width, pattern_height,
+ draw_surface,
+ pattern_width*2, pattern_width, pattern_height,
+ draw_surface,
+ pattern_height*2, pattern_width, pattern_height,
+ draw_surface,
+ pattern_width*2, pattern_height*2, pattern_width, pattern_height,
+ draw_surface);
+ } else {
+ _cairo_output_stream_printf (surface->output,
+ " %s \n",
+ draw_surface);
+ }
+
+ status = _cairo_pdf_surface_close_stream (surface);
+ if (unlikely (status))
+ return status;
+
+ return _cairo_output_stream_get_status (surface->output);
+}
+
+typedef struct _cairo_pdf_color_stop {
+ double offset;
+ double color[4];
+ cairo_pdf_resource_t resource;
+} cairo_pdf_color_stop_t;
+
+static cairo_int_status_t
+cairo_pdf_surface_emit_rgb_linear_function (cairo_pdf_surface_t *surface,
+ cairo_pdf_color_stop_t *stop1,
+ cairo_pdf_color_stop_t *stop2,
+ cairo_pdf_resource_t *function)
+{
+ int num_elems, i;
+ cairo_pdf_rgb_linear_function_t elem;
+ cairo_pdf_resource_t res;
+ cairo_int_status_t status;
+
+ num_elems = _cairo_array_num_elements (&surface->rgb_linear_functions);
+ for (i = 0; i < num_elems; i++) {
+ _cairo_array_copy_element (&surface->rgb_linear_functions, i, &elem);
+ if (memcmp (&elem.color1[0], &stop1->color[0], sizeof (double)*3) != 0)
+ continue;
+ if (memcmp (&elem.color2[0], &stop2->color[0], sizeof (double)*3) != 0)
+ continue;
+ *function = elem.resource;
+ return CAIRO_STATUS_SUCCESS;
+ }
+
+ res = _cairo_pdf_surface_new_object (surface);
+ if (res.id == 0)
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n"
+ "<< /FunctionType 2\n"
+ " /Domain [ 0 1 ]\n"
+ " /C0 [ %f %f %f ]\n"
+ " /C1 [ %f %f %f ]\n"
+ " /N 1\n"
+ ">>\n"
+ "endobj\n",
+ res.id,
+ stop1->color[0],
+ stop1->color[1],
+ stop1->color[2],
+ stop2->color[0],
+ stop2->color[1],
+ stop2->color[2]);
+
+ elem.resource = res;
+ memcpy (&elem.color1[0], &stop1->color[0], sizeof (double)*3);
+ memcpy (&elem.color2[0], &stop2->color[0], sizeof (double)*3);
+
+ status = _cairo_array_append (&surface->rgb_linear_functions, &elem);
+ *function = res;
+
+ return status;
+}
+
+static cairo_int_status_t
+cairo_pdf_surface_emit_alpha_linear_function (cairo_pdf_surface_t *surface,
+ cairo_pdf_color_stop_t *stop1,
+ cairo_pdf_color_stop_t *stop2,
+ cairo_pdf_resource_t *function)
+{
+ int num_elems, i;
+ cairo_pdf_alpha_linear_function_t elem;
+ cairo_pdf_resource_t res;
+ cairo_int_status_t status;
+
+ num_elems = _cairo_array_num_elements (&surface->alpha_linear_functions);
+ for (i = 0; i < num_elems; i++) {
+ _cairo_array_copy_element (&surface->alpha_linear_functions, i, &elem);
+ if (elem.alpha1 != stop1->color[3])
+ continue;
+ if (elem.alpha2 != stop2->color[3])
+ continue;
+ *function = elem.resource;
+ return CAIRO_STATUS_SUCCESS;
+ }
+
+ res = _cairo_pdf_surface_new_object (surface);
+ if (res.id == 0)
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n"
+ "<< /FunctionType 2\n"
+ " /Domain [ 0 1 ]\n"
+ " /C0 [ %f ]\n"
+ " /C1 [ %f ]\n"
+ " /N 1\n"
+ ">>\n"
+ "endobj\n",
+ res.id,
+ stop1->color[3],
+ stop2->color[3]);
+
+ elem.resource = res;
+ elem.alpha1 = stop1->color[3];
+ elem.alpha2 = stop2->color[3];
+
+ status = _cairo_array_append (&surface->alpha_linear_functions, &elem);
+ *function = res;
+
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_emit_stitched_colorgradient (cairo_pdf_surface_t *surface,
+ unsigned int n_stops,
+ cairo_pdf_color_stop_t *stops,
+ cairo_bool_t is_alpha,
+ cairo_pdf_resource_t *function)
+{
+ cairo_pdf_resource_t res;
+ unsigned int i;
+ cairo_int_status_t status;
+
+ /* emit linear gradients between pairs of subsequent stops... */
+ for (i = 0; i < n_stops-1; i++) {
+ if (is_alpha) {
+ status = cairo_pdf_surface_emit_alpha_linear_function (surface,
+ &stops[i],
+ &stops[i+1],
+ &stops[i].resource);
+ if (unlikely (status))
+ return status;
+ } else {
+ status = cairo_pdf_surface_emit_rgb_linear_function (surface,
+ &stops[i],
+ &stops[i+1],
+ &stops[i].resource);
+ if (unlikely (status))
+ return status;
+ }
+ }
+
+ /* ... and stitch them together */
+ res = _cairo_pdf_surface_new_object (surface);
+ if (res.id == 0)
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n"
+ "<< /FunctionType 3\n"
+ " /Domain [ %f %f ]\n",
+ res.id,
+ stops[0].offset,
+ stops[n_stops - 1].offset);
+
+ _cairo_output_stream_printf (surface->output,
+ " /Functions [ ");
+ for (i = 0; i < n_stops-1; i++)
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 R ", stops[i].resource.id);
+ _cairo_output_stream_printf (surface->output,
+ "]\n");
+
+ _cairo_output_stream_printf (surface->output,
+ " /Bounds [ ");
+ for (i = 1; i < n_stops-1; i++)
+ _cairo_output_stream_printf (surface->output,
+ "%f ", stops[i].offset);
+ _cairo_output_stream_printf (surface->output,
+ "]\n");
+
+ _cairo_output_stream_printf (surface->output,
+ " /Encode [ ");
+ for (i = 1; i < n_stops; i++)
+ _cairo_output_stream_printf (surface->output,
+ "0 1 ");
+ _cairo_output_stream_printf (surface->output,
+ "]\n");
+
+ _cairo_output_stream_printf (surface->output,
+ ">>\n"
+ "endobj\n");
+
+ *function = res;
+
+ return _cairo_output_stream_get_status (surface->output);
+}
+
+
+static void
+calc_gradient_color (cairo_pdf_color_stop_t *new_stop,
+ cairo_pdf_color_stop_t *stop1,
+ cairo_pdf_color_stop_t *stop2)
+{
+ int i;
+ double offset = stop1->offset / (stop1->offset + 1.0 - stop2->offset);
+
+ for (i = 0; i < 4; i++)
+ new_stop->color[i] = stop1->color[i] + offset*(stop2->color[i] - stop1->color[i]);
+}
+
+#define COLOR_STOP_EPSILON 1e-6
+
+static cairo_int_status_t
+_cairo_pdf_surface_emit_pattern_stops (cairo_pdf_surface_t *surface,
+ cairo_gradient_pattern_t *pattern,
+ cairo_pdf_resource_t *color_function,
+ cairo_pdf_resource_t *alpha_function)
+{
+ cairo_pdf_color_stop_t *allstops, *stops;
+ unsigned int n_stops;
+ unsigned int i;
+ cairo_bool_t emit_alpha = FALSE;
+ cairo_int_status_t status;
+
+ color_function->id = 0;
+ alpha_function->id = 0;
+
+ allstops = _cairo_malloc_ab ((pattern->n_stops + 2), sizeof (cairo_pdf_color_stop_t));
+ if (unlikely (allstops == NULL))
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+
+ stops = &allstops[1];
+ n_stops = pattern->n_stops;
+
+ for (i = 0; i < n_stops; i++) {
+ stops[i].color[0] = pattern->stops[i].color.red;
+ stops[i].color[1] = pattern->stops[i].color.green;
+ stops[i].color[2] = pattern->stops[i].color.blue;
+ stops[i].color[3] = pattern->stops[i].color.alpha;
+ if (!CAIRO_ALPHA_IS_OPAQUE (stops[i].color[3]))
+ emit_alpha = TRUE;
+ stops[i].offset = pattern->stops[i].offset;
+ }
+
+ if (pattern->base.extend == CAIRO_EXTEND_REPEAT ||
+ pattern->base.extend == CAIRO_EXTEND_REFLECT) {
+ if (stops[0].offset > COLOR_STOP_EPSILON) {
+ if (pattern->base.extend == CAIRO_EXTEND_REFLECT)
+ memcpy (allstops, stops, sizeof (cairo_pdf_color_stop_t));
+ else
+ calc_gradient_color (&allstops[0], &stops[0], &stops[n_stops-1]);
+ stops = allstops;
+ n_stops++;
+ }
+ stops[0].offset = 0.0;
+
+ if (stops[n_stops-1].offset < 1.0 - COLOR_STOP_EPSILON) {
+ if (pattern->base.extend == CAIRO_EXTEND_REFLECT) {
+ memcpy (&stops[n_stops],
+ &stops[n_stops - 1],
+ sizeof (cairo_pdf_color_stop_t));
+ } else {
+ calc_gradient_color (&stops[n_stops], &stops[0], &stops[n_stops-1]);
+ }
+ n_stops++;
+ }
+ stops[n_stops-1].offset = 1.0;
+ }
+
+ if (stops[0].offset == stops[n_stops - 1].offset) {
+ /*
+ * The first and the last stops have the same offset, but we
+ * don't want a function with an empty domain, because that
+ * would provoke underdefined behaviour from rasterisers.
+ * This can only happen with EXTEND_PAD, because EXTEND_NONE
+ * is optimised into a clear pattern in cairo-gstate, and
+ * REFLECT/REPEAT are always transformed to have the first
+ * stop at t=0 and the last stop at t=1. Thus we want a step
+ * function going from the first color to the last one.
+ *
+ * This can be accomplished by stitching three functions:
+ * - a constant first color function,
+ * - a step from the first color to the last color (with empty domain)
+ * - a constant last color function
+ */
+ cairo_pdf_color_stop_t pad_stops[4];
+
+ assert (pattern->base.extend == CAIRO_EXTEND_PAD);
+
+ pad_stops[0] = pad_stops[1] = stops[0];
+ pad_stops[2] = pad_stops[3] = stops[n_stops - 1];
+
+ pad_stops[0].offset = 0;
+ pad_stops[3].offset = 1;
+
+ status = _cairo_pdf_surface_emit_stitched_colorgradient (surface,
+ 4,
+ pad_stops,
+ FALSE,
+ color_function);
+ if (unlikely (status))
+ goto BAIL;
+
+ if (emit_alpha) {
+ status = _cairo_pdf_surface_emit_stitched_colorgradient (surface,
+ 4,
+ pad_stops,
+ TRUE,
+ alpha_function);
+ if (unlikely (status))
+ goto BAIL;
+ }
+ } else if (n_stops == 2) {
+ /* no need for stitched function */
+ status = cairo_pdf_surface_emit_rgb_linear_function (surface,
+ &stops[0],
+ &stops[n_stops - 1],
+ color_function);
+ if (unlikely (status))
+ goto BAIL;
+
+ if (emit_alpha) {
+ status = cairo_pdf_surface_emit_alpha_linear_function (surface,
+ &stops[0],
+ &stops[n_stops - 1],
+ alpha_function);
+ if (unlikely (status))
+ goto BAIL;
+ }
+ } else {
+ /* multiple stops: stitch. XXX possible optimization: regularly spaced
+ * stops do not require stitching. XXX */
+ status = _cairo_pdf_surface_emit_stitched_colorgradient (surface,
+ n_stops,
+ stops,
+ FALSE,
+ color_function);
+ if (unlikely (status))
+ goto BAIL;
+
+ if (emit_alpha) {
+ status = _cairo_pdf_surface_emit_stitched_colorgradient (surface,
+ n_stops,
+ stops,
+ TRUE,
+ alpha_function);
+ if (unlikely (status))
+ goto BAIL;
+ }
+ }
+
+BAIL:
+ free (allstops);
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_emit_repeating_function (cairo_pdf_surface_t *surface,
+ cairo_gradient_pattern_t *pattern,
+ cairo_pdf_resource_t *function,
+ int begin,
+ int end)
+{
+ cairo_pdf_resource_t res;
+ int i;
+
+ res = _cairo_pdf_surface_new_object (surface);
+ if (res.id == 0)
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n"
+ "<< /FunctionType 3\n"
+ " /Domain [ %d %d ]\n",
+ res.id,
+ begin,
+ end);
+
+ _cairo_output_stream_printf (surface->output,
+ " /Functions [ ");
+ for (i = begin; i < end; i++)
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 R ", function->id);
+ _cairo_output_stream_printf (surface->output,
+ "]\n");
+
+ _cairo_output_stream_printf (surface->output,
+ " /Bounds [ ");
+ for (i = begin + 1; i < end; i++)
+ _cairo_output_stream_printf (surface->output,
+ "%d ", i);
+ _cairo_output_stream_printf (surface->output,
+ "]\n");
+
+ _cairo_output_stream_printf (surface->output,
+ " /Encode [ ");
+ for (i = begin; i < end; i++) {
+ if ((i % 2) && pattern->base.extend == CAIRO_EXTEND_REFLECT) {
+ _cairo_output_stream_printf (surface->output,
+ "1 0 ");
+ } else {
+ _cairo_output_stream_printf (surface->output,
+ "0 1 ");
+ }
+ }
+ _cairo_output_stream_printf (surface->output,
+ "]\n");
+
+ _cairo_output_stream_printf (surface->output,
+ ">>\n"
+ "endobj\n");
+
+ *function = res;
+
+ return _cairo_output_stream_get_status (surface->output);
+}
+
+static cairo_int_status_t
+cairo_pdf_surface_emit_transparency_group (cairo_pdf_surface_t *surface,
+ cairo_pdf_pattern_t *pdf_pattern,
+ cairo_pdf_resource_t gstate_resource,
+ cairo_pdf_resource_t gradient_mask)
+{
+ cairo_pdf_resource_t smask_resource;
+ cairo_int_status_t status;
+ char buf[100];
+ double x1, y1, x2, y2;
+
+ if (pdf_pattern->is_shading) {
+ snprintf(buf, sizeof(buf),
+ " /Shading\n"
+ " << /sh%d %d 0 R >>\n",
+ gradient_mask.id,
+ gradient_mask.id);
+ } else {
+ snprintf(buf, sizeof(buf),
+ " /Pattern\n"
+ " << /p%d %d 0 R >>\n",
+ gradient_mask.id,
+ gradient_mask.id);
+ }
+
+ if (pdf_pattern->is_shading) {
+ cairo_box_t box;
+
+ /* When emitting a shading operator we are in cairo pattern
+ * coordinates. _cairo_pdf_surface_paint_gradient has set the
+ * ctm to the pattern matrix (including the convertion from
+ * pdf to cairo coordinates) */
+ _cairo_box_from_rectangle (&box, &pdf_pattern->extents);
+ _cairo_box_to_doubles (&box, &x1, &y1, &x2, &y2);
+ _cairo_matrix_transform_bounding_box (&pdf_pattern->pattern->matrix, &x1, &y1, &x2, &y2, NULL);
+ } else {
+ cairo_box_double_t box;
+
+ /* When emitting a shading pattern we are in pdf page
+ * coordinates. The color and alpha shading patterns painted
+ * in the XObject below contain the cairo pattern to pdf page
+ * matrix in the /Matrix entry of the pattern. */
+ _get_bbox_from_extents (pdf_pattern->height, &pdf_pattern->extents, &box);
+ x1 = box.p1.x;
+ y1 = box.p1.y;
+ x2 = box.p2.x;
+ y2 = box.p2.y;
+ }
+ status = _cairo_pdf_surface_open_stream (surface,
+ NULL,
+ surface->compress_content,
+ " /Type /XObject\n"
+ " /Subtype /Form\n"
+ " /FormType 1\n"
+ " /BBox [ %f %f %f %f ]\n"
+ " /Resources\n"
+ " << /ExtGState\n"
+ " << /a0 << /ca 1 /CA 1 >>"
+ " >>\n"
+ "%s"
+ " >>\n"
+ " /Group\n"
+ " << /Type /Group\n"
+ " /S /Transparency\n"
+ " /I true\n"
+ " /CS /DeviceGray\n"
+ " >>\n",
+ x1,y1,x2,y2,
+ buf);
+ if (unlikely (status))
+ return status;
+
+ if (pdf_pattern->is_shading) {
+ _cairo_output_stream_printf (surface->output,
+ "/a0 gs /sh%d sh\n",
+ gradient_mask.id);
+ } else {
+ _cairo_output_stream_printf (surface->output,
+ "q\n"
+ "/a0 gs\n"
+ "/Pattern cs /p%d scn\n"
+ "0 0 %f %f re\n"
+ "f\n"
+ "Q\n",
+ gradient_mask.id,
+ surface->width,
+ surface->height);
+ }
+
+ status = _cairo_pdf_surface_close_stream (surface);
+ if (unlikely (status))
+ return status;
+
+ smask_resource = _cairo_pdf_surface_new_object (surface);
+ if (smask_resource.id == 0)
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n"
+ "<< /Type /Mask\n"
+ " /S /Luminosity\n"
+ " /G %d 0 R\n"
+ ">>\n"
+ "endobj\n",
+ smask_resource.id,
+ surface->pdf_stream.self.id);
+
+ /* Create GState which uses the transparency group as an SMask. */
+ _cairo_pdf_surface_update_object (surface, gstate_resource);
+
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n"
+ "<< /Type /ExtGState\n"
+ " /SMask %d 0 R\n"
+ " /ca 1\n"
+ " /CA 1\n"
+ " /AIS false\n"
+ ">>\n"
+ "endobj\n",
+ gstate_resource.id,
+ smask_resource.id);
+
+ return _cairo_output_stream_get_status (surface->output);
+}
+
+static void
+_cairo_pdf_surface_output_gradient (cairo_pdf_surface_t *surface,
+ const cairo_pdf_pattern_t *pdf_pattern,
+ cairo_pdf_resource_t pattern_resource,
+ const cairo_matrix_t *pat_to_pdf,
+ const cairo_circle_double_t*start,
+ const cairo_circle_double_t*end,
+ const double *domain,
+ const char *colorspace,
+ cairo_pdf_resource_t color_function)
+{
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n",
+ pattern_resource.id);
+
+ if (!pdf_pattern->is_shading) {
+ _cairo_output_stream_printf (surface->output,
+ "<< /Type /Pattern\n"
+ " /PatternType 2\n"
+ " /Matrix [ ");
+ _cairo_output_stream_print_matrix (surface->output, pat_to_pdf);
+ _cairo_output_stream_printf (surface->output,
+ " ]\n"
+ " /Shading\n");
+ }
+
+ if (pdf_pattern->pattern->type == CAIRO_PATTERN_TYPE_LINEAR) {
+ _cairo_output_stream_printf (surface->output,
+ " << /ShadingType 2\n"
+ " /ColorSpace %s\n"
+ " /Coords [ %f %f %f %f ]\n",
+ colorspace,
+ start->center.x, start->center.y,
+ end->center.x, end->center.y);
+ } else {
+ _cairo_output_stream_printf (surface->output,
+ " << /ShadingType 3\n"
+ " /ColorSpace %s\n"
+ " /Coords [ %f %f %f %f %f %f ]\n",
+ colorspace,
+ start->center.x, start->center.y,
+ MAX (start->radius, 0),
+ end->center.x, end->center.y,
+ MAX (end->radius, 0));
+ }
+
+ _cairo_output_stream_printf (surface->output,
+ " /Domain [ %f %f ]\n",
+ domain[0], domain[1]);
+
+ if (pdf_pattern->pattern->extend != CAIRO_EXTEND_NONE) {
+ _cairo_output_stream_printf (surface->output,
+ " /Extend [ true true ]\n");
+ } else {
+ _cairo_output_stream_printf (surface->output,
+ " /Extend [ false false ]\n");
+ }
+
+ _cairo_output_stream_printf (surface->output,
+ " /Function %d 0 R\n"
+ " >>\n",
+ color_function.id);
+
+ if (!pdf_pattern->is_shading) {
+ _cairo_output_stream_printf (surface->output,
+ ">>\n");
+ }
+
+ _cairo_output_stream_printf (surface->output,
+ "endobj\n");
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_emit_gradient (cairo_pdf_surface_t *surface,
+ cairo_pdf_pattern_t *pdf_pattern)
+{
+ cairo_gradient_pattern_t *pattern = (cairo_gradient_pattern_t *) pdf_pattern->pattern;
+ cairo_pdf_resource_t color_function, alpha_function;
+ cairo_matrix_t pat_to_pdf;
+ cairo_circle_double_t start, end;
+ double domain[2];
+ cairo_int_status_t status;
+
+ assert (pattern->n_stops != 0);
+
+ status = _cairo_pdf_surface_emit_pattern_stops (surface,
+ pattern,
+ &color_function,
+ &alpha_function);
+ if (unlikely (status))
+ return status;
+
+ pat_to_pdf = pattern->base.matrix;
+ status = cairo_matrix_invert (&pat_to_pdf);
+ /* cairo_pattern_set_matrix ensures the matrix is invertible */
+ assert (status == CAIRO_INT_STATUS_SUCCESS);
+ cairo_matrix_multiply (&pat_to_pdf, &pat_to_pdf, &surface->cairo_to_pdf);
+
+ if (pattern->base.extend == CAIRO_EXTEND_REPEAT ||
+ pattern->base.extend == CAIRO_EXTEND_REFLECT)
+ {
+ double bounds_x1, bounds_x2, bounds_y1, bounds_y2;
+ double x_scale, y_scale, tolerance;
+
+ /* TODO: use tighter extents */
+ bounds_x1 = 0;
+ bounds_y1 = 0;
+ bounds_x2 = surface->width;
+ bounds_y2 = surface->height;
+ _cairo_matrix_transform_bounding_box (&pattern->base.matrix,
+ &bounds_x1, &bounds_y1,
+ &bounds_x2, &bounds_y2,
+ NULL);
+
+ x_scale = surface->base.x_resolution / surface->base.x_fallback_resolution;
+ y_scale = surface->base.y_resolution / surface->base.y_fallback_resolution;
+
+ tolerance = fabs (_cairo_matrix_compute_determinant (&pattern->base.matrix));
+ tolerance /= _cairo_matrix_transformed_circle_major_axis (&pattern->base.matrix, 1);
+ tolerance *= MIN (x_scale, y_scale);
+
+ _cairo_gradient_pattern_box_to_parameter (pattern,
+ bounds_x1, bounds_y1,
+ bounds_x2, bounds_y2,
+ tolerance, domain);
+ } else if (pattern->stops[0].offset == pattern->stops[pattern->n_stops - 1].offset) {
+ /*
+ * If the first and the last stop offset are the same, then
+ * the color function is a step function.
+ * _cairo_ps_surface_emit_pattern_stops emits it as a stitched
+ * function no matter how many stops the pattern has. The
+ * domain of the stitched function will be [0 1] in this case.
+ *
+ * This is done to avoid emitting degenerate gradients for
+ * EXTEND_PAD patterns having a step color function.
+ */
+ domain[0] = 0.0;
+ domain[1] = 1.0;
+
+ assert (pattern->base.extend == CAIRO_EXTEND_PAD);
+ } else {
+ domain[0] = pattern->stops[0].offset;
+ domain[1] = pattern->stops[pattern->n_stops - 1].offset;
+ }
+
+ /* PDF requires the first and last stop to be the same as the
+ * extreme coordinates. For repeating patterns this moves the
+ * extreme coordinates out to the begin/end of the repeating
+ * function. For non repeating patterns this may move the extreme
+ * coordinates in if there are not stops at offset 0 and 1. */
+ _cairo_gradient_pattern_interpolate (pattern, domain[0], &start);
+ _cairo_gradient_pattern_interpolate (pattern, domain[1], &end);
+
+ if (pattern->base.extend == CAIRO_EXTEND_REPEAT ||
+ pattern->base.extend == CAIRO_EXTEND_REFLECT)
+ {
+ int repeat_begin, repeat_end;
+
+ repeat_begin = floor (domain[0]);
+ repeat_end = ceil (domain[1]);
+
+ status = _cairo_pdf_surface_emit_repeating_function (surface,
+ pattern,
+ &color_function,
+ repeat_begin,
+ repeat_end);
+ if (unlikely (status))
+ return status;
+
+ if (alpha_function.id != 0) {
+ status = _cairo_pdf_surface_emit_repeating_function (surface,
+ pattern,
+ &alpha_function,
+ repeat_begin,
+ repeat_end);
+ if (unlikely (status))
+ return status;
+ }
+ } else if (pattern->n_stops <= 2) {
+ /* For EXTEND_NONE and EXTEND_PAD if there are only two stops a
+ * Type 2 function is used by itself without a stitching
+ * function. Type 2 functions always have the domain [0 1] */
+ domain[0] = 0.0;
+ domain[1] = 1.0;
+ }
+
+ _cairo_pdf_surface_update_object (surface, pdf_pattern->pattern_res);
+ _cairo_pdf_surface_output_gradient (surface, pdf_pattern,
+ pdf_pattern->pattern_res,
+ &pat_to_pdf, &start, &end, domain,
+ "/DeviceRGB", color_function);
+
+ if (alpha_function.id != 0) {
+ cairo_pdf_resource_t mask_resource;
+
+ assert (pdf_pattern->gstate_res.id != 0);
+
+ /* Create pattern for SMask. */
+ mask_resource = _cairo_pdf_surface_new_object (surface);
+ if (mask_resource.id == 0)
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+
+ _cairo_pdf_surface_output_gradient (surface, pdf_pattern,
+ mask_resource,
+ &pat_to_pdf, &start, &end, domain,
+ "/DeviceGray", alpha_function);
+
+ status = cairo_pdf_surface_emit_transparency_group (surface,
+ pdf_pattern,
+ pdf_pattern->gstate_res,
+ mask_resource);
+ if (unlikely (status))
+ return status;
+ }
+
+ return _cairo_output_stream_get_status (surface->output);
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_emit_mesh_pattern (cairo_pdf_surface_t *surface,
+ cairo_pdf_pattern_t *pdf_pattern)
+{
+ cairo_matrix_t pat_to_pdf;
+ cairo_int_status_t status;
+ cairo_pattern_t *pattern = pdf_pattern->pattern;
+ cairo_pdf_shading_t shading;
+ int i;
+ cairo_pdf_resource_t res;
+
+ pat_to_pdf = pattern->matrix;
+ status = cairo_matrix_invert (&pat_to_pdf);
+ /* cairo_pattern_set_matrix ensures the matrix is invertible */
+ assert (status == CAIRO_INT_STATUS_SUCCESS);
+
+ cairo_matrix_multiply (&pat_to_pdf, &pat_to_pdf, &surface->cairo_to_pdf);
+
+ status = _cairo_pdf_shading_init_color (&shading, (cairo_mesh_pattern_t *) pattern);
+ if (unlikely (status))
+ return status;
+
+ res = _cairo_pdf_surface_new_object (surface);
+ if (unlikely (res.id == 0))
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n"
+ "<< /ShadingType %d\n"
+ " /ColorSpace /DeviceRGB\n"
+ " /BitsPerCoordinate %d\n"
+ " /BitsPerComponent %d\n"
+ " /BitsPerFlag %d\n"
+ " /Decode [",
+ res.id,
+ shading.shading_type,
+ shading.bits_per_coordinate,
+ shading.bits_per_component,
+ shading.bits_per_flag);
+
+ for (i = 0; i < shading.decode_array_length; i++)
+ _cairo_output_stream_printf (surface->output, "%f ", shading.decode_array[i]);
+
+ _cairo_output_stream_printf (surface->output,
+ "]\n"
+ " /Length %ld\n"
+ ">>\n"
+ "stream\n",
+ shading.data_length);
+
+ _cairo_output_stream_write (surface->output, shading.data, shading.data_length);
+
+ _cairo_output_stream_printf (surface->output,
+ "\nendstream\n"
+ "endobj\n");
+
+ _cairo_pdf_shading_fini (&shading);
+
+ _cairo_pdf_surface_update_object (surface, pdf_pattern->pattern_res);
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n"
+ "<< /Type /Pattern\n"
+ " /PatternType 2\n"
+ " /Matrix [ ",
+ pdf_pattern->pattern_res.id);
+ _cairo_output_stream_print_matrix (surface->output, &pat_to_pdf);
+ _cairo_output_stream_printf (surface->output,
+ " ]\n"
+ " /Shading %d 0 R\n"
+ ">>\n"
+ "endobj\n",
+ res.id);
+
+ if (pdf_pattern->gstate_res.id != 0) {
+ cairo_pdf_resource_t mask_resource;
+
+ /* Create pattern for SMask. */
+ res = _cairo_pdf_surface_new_object (surface);
+ if (unlikely (res.id == 0))
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+
+ status = _cairo_pdf_shading_init_alpha (&shading, (cairo_mesh_pattern_t *) pattern);
+ if (unlikely (status))
+ return status;
+
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n"
+ "<< /ShadingType %d\n"
+ " /ColorSpace /DeviceGray\n"
+ " /BitsPerCoordinate %d\n"
+ " /BitsPerComponent %d\n"
+ " /BitsPerFlag %d\n"
+ " /Decode [",
+ res.id,
+ shading.shading_type,
+ shading.bits_per_coordinate,
+ shading.bits_per_component,
+ shading.bits_per_flag);
+
+ for (i = 0; i < shading.decode_array_length; i++)
+ _cairo_output_stream_printf (surface->output, "%f ", shading.decode_array[i]);
+
+ _cairo_output_stream_printf (surface->output,
+ "]\n"
+ " /Length %ld\n"
+ ">>\n"
+ "stream\n",
+ shading.data_length);
+
+ _cairo_output_stream_write (surface->output, shading.data, shading.data_length);
+
+ _cairo_output_stream_printf (surface->output,
+ "\nendstream\n"
+ "endobj\n");
+ _cairo_pdf_shading_fini (&shading);
+
+ mask_resource = _cairo_pdf_surface_new_object (surface);
+ if (unlikely (mask_resource.id == 0))
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n"
+ "<< /Type /Pattern\n"
+ " /PatternType 2\n"
+ " /Matrix [ ",
+ mask_resource.id);
+ _cairo_output_stream_print_matrix (surface->output, &pat_to_pdf);
+ _cairo_output_stream_printf (surface->output,
+ " ]\n"
+ " /Shading %d 0 R\n"
+ ">>\n"
+ "endobj\n",
+ res.id);
+
+ status = cairo_pdf_surface_emit_transparency_group (surface,
+ pdf_pattern,
+ pdf_pattern->gstate_res,
+ mask_resource);
+ if (unlikely (status))
+ return status;
+ }
+
+ return _cairo_output_stream_get_status (surface->output);
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_emit_pattern (cairo_pdf_surface_t *surface, cairo_pdf_pattern_t *pdf_pattern)
+{
+ double old_width, old_height;
+ cairo_int_status_t status;
+
+ old_width = surface->width;
+ old_height = surface->height;
+ _cairo_pdf_surface_set_size_internal (surface,
+ pdf_pattern->width,
+ pdf_pattern->height);
+
+ switch (pdf_pattern->pattern->type) {
+ case CAIRO_PATTERN_TYPE_SOLID:
+ ASSERT_NOT_REACHED;
+ status = _cairo_error (CAIRO_STATUS_PATTERN_TYPE_MISMATCH);
+ break;
+
+ case CAIRO_PATTERN_TYPE_SURFACE:
+ case CAIRO_PATTERN_TYPE_RASTER_SOURCE:
+ status = _cairo_pdf_surface_emit_surface_pattern (surface, pdf_pattern);
+ break;
+
+ case CAIRO_PATTERN_TYPE_LINEAR:
+ case CAIRO_PATTERN_TYPE_RADIAL:
+ status = _cairo_pdf_surface_emit_gradient (surface, pdf_pattern);
+ break;
+
+ case CAIRO_PATTERN_TYPE_MESH:
+ status = _cairo_pdf_surface_emit_mesh_pattern (surface, pdf_pattern);
+ break;
+
+ default:
+ ASSERT_NOT_REACHED;
+ status = _cairo_error (CAIRO_STATUS_PATTERN_TYPE_MISMATCH);
+ break;
+ }
+
+ _cairo_pdf_surface_set_size_internal (surface,
+ old_width,
+ old_height);
+
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_paint_surface_pattern (cairo_pdf_surface_t *surface,
+ cairo_operator_t op,
+ const cairo_pattern_t *source,
+ const cairo_rectangle_int_t *extents,
+ cairo_pdf_resource_t *smask_res,
+ cairo_bool_t stencil_mask)
+{
+ cairo_pdf_resource_t surface_res;
+ int width, height;
+ cairo_matrix_t cairo_p2d, pdf_p2d;
+ cairo_int_status_t status;
+ int alpha;
+ cairo_rectangle_int_t extents2;
+ double x_offset;
+ double y_offset;
+
+ if (source->extend == CAIRO_EXTEND_PAD &&
+ !(source->type == CAIRO_PATTERN_TYPE_SURFACE &&
+ ((cairo_surface_pattern_t *)source)->surface->type == CAIRO_SURFACE_TYPE_RECORDING))
+ {
+ status = _cairo_pdf_surface_add_padded_image_surface (surface,
+ source,
+ extents,
+ &surface_res,
+ &width,
+ &height,
+ &x_offset,
+ &y_offset);
+ } else {
+ status = _cairo_pdf_surface_add_source_surface (surface,
+ NULL,
+ source,
+ op,
+ source->filter,
+ stencil_mask,
+ FALSE,
+ extents,
+ smask_res,
+ &surface_res,
+ &width,
+ &height,
+ &x_offset,
+ &y_offset,
+ &extents2);
+ }
+ if (unlikely (status))
+ return status;
+
+ cairo_p2d = source->matrix;
+ status = cairo_matrix_invert (&cairo_p2d);
+ /* cairo_pattern_set_matrix ensures the matrix is invertible */
+ assert (status == CAIRO_INT_STATUS_SUCCESS);
+
+ pdf_p2d = surface->cairo_to_pdf;
+ cairo_matrix_multiply (&pdf_p2d, &cairo_p2d, &pdf_p2d);
+ cairo_matrix_translate (&pdf_p2d, x_offset, y_offset);
+ cairo_matrix_translate (&pdf_p2d, 0.0, height);
+ cairo_matrix_scale (&pdf_p2d, 1.0, -1.0);
+ if (!(source->type == CAIRO_PATTERN_TYPE_SURFACE &&
+ ((cairo_surface_pattern_t *)source)->surface->type == CAIRO_SURFACE_TYPE_RECORDING))
+ {
+ cairo_matrix_scale (&pdf_p2d, width, height);
+ }
+
+ status = _cairo_pdf_operators_flush (&surface->pdf_operators);
+ if (unlikely (status))
+ return status;
+
+ if (! _cairo_matrix_is_identity (&pdf_p2d)) {
+ _cairo_output_stream_print_matrix (surface->output, &pdf_p2d);
+ _cairo_output_stream_printf (surface->output, " cm\n");
+ }
+
+ status = _cairo_pdf_surface_add_alpha (surface, 1.0, &alpha);
+ if (unlikely (status))
+ return status;
+
+ if (stencil_mask) {
+ _cairo_output_stream_printf (surface->output,
+ "/x%d Do\n",
+ surface_res.id);
+ } else {
+ _cairo_output_stream_printf (surface->output,
+ "/a%d gs /x%d Do\n",
+ alpha,
+ surface_res.id);
+ }
+
+ return _cairo_pdf_surface_add_xobject (surface, surface_res);
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_paint_gradient (cairo_pdf_surface_t *surface,
+ cairo_operator_t op,
+ const cairo_pattern_t *source,
+ const cairo_rectangle_int_t *extents)
+{
+ cairo_pdf_resource_t shading_res, gstate_res;
+ cairo_matrix_t pat_to_pdf;
+ cairo_int_status_t status;
+ int alpha;
+
+ status = _cairo_pdf_surface_add_pdf_shading (surface, source,
+ op, extents,
+ &shading_res, &gstate_res);
+ if (unlikely (status == CAIRO_INT_STATUS_NOTHING_TO_DO))
+ return CAIRO_INT_STATUS_SUCCESS;
+ if (unlikely (status))
+ return status;
+
+ pat_to_pdf = source->matrix;
+ status = cairo_matrix_invert (&pat_to_pdf);
+ /* cairo_pattern_set_matrix ensures the matrix is invertible */
+ assert (status == CAIRO_INT_STATUS_SUCCESS);
+ cairo_matrix_multiply (&pat_to_pdf, &pat_to_pdf, &surface->cairo_to_pdf);
+
+ status = _cairo_pdf_operators_flush (&surface->pdf_operators);
+ if (unlikely (status))
+ return status;
+
+ if (! _cairo_matrix_is_identity (&pat_to_pdf)) {
+ _cairo_output_stream_print_matrix (surface->output, &pat_to_pdf);
+ _cairo_output_stream_printf (surface->output, " cm\n");
+ }
+
+ status = _cairo_pdf_surface_add_shading (surface, shading_res);
+ if (unlikely (status))
+ return status;
+
+ if (gstate_res.id != 0) {
+ status = _cairo_pdf_surface_add_smask (surface, gstate_res);
+ if (unlikely (status))
+ return status;
+
+ _cairo_output_stream_printf (surface->output,
+ "/s%d gs /sh%d sh\n",
+ gstate_res.id,
+ shading_res.id);
+ } else {
+ status = _cairo_pdf_surface_add_alpha (surface, 1.0, &alpha);
+ if (unlikely (status))
+ return status;
+
+ _cairo_output_stream_printf (surface->output,
+ "/a%d gs /sh%d sh\n",
+ alpha,
+ shading_res.id);
+ }
+
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_paint_pattern (cairo_pdf_surface_t *surface,
+ cairo_operator_t op,
+ const cairo_pattern_t *source,
+ const cairo_rectangle_int_t *extents,
+ cairo_bool_t mask)
+{
+ switch (source->type) {
+ case CAIRO_PATTERN_TYPE_SURFACE:
+ case CAIRO_PATTERN_TYPE_RASTER_SOURCE:
+ return _cairo_pdf_surface_paint_surface_pattern (surface,
+ op,
+ source,
+ extents,
+ NULL,
+ mask);
+ case CAIRO_PATTERN_TYPE_LINEAR:
+ case CAIRO_PATTERN_TYPE_RADIAL:
+ case CAIRO_PATTERN_TYPE_MESH:
+ return _cairo_pdf_surface_paint_gradient (surface,
+ op,
+ source,
+ extents);
+
+ case CAIRO_PATTERN_TYPE_SOLID:
+ default:
+ ASSERT_NOT_REACHED;
+ return CAIRO_STATUS_SUCCESS;
+ }
+}
+
+static cairo_bool_t
+_can_paint_pattern (const cairo_pattern_t *pattern)
+{
+ switch (pattern->type) {
+ case CAIRO_PATTERN_TYPE_SOLID:
+ return FALSE;
+
+ case CAIRO_PATTERN_TYPE_SURFACE:
+ case CAIRO_PATTERN_TYPE_RASTER_SOURCE:
+ return (pattern->extend == CAIRO_EXTEND_NONE ||
+ pattern->extend == CAIRO_EXTEND_PAD);
+
+ case CAIRO_PATTERN_TYPE_LINEAR:
+ case CAIRO_PATTERN_TYPE_RADIAL:
+ return TRUE;
+
+ case CAIRO_PATTERN_TYPE_MESH:
+ return FALSE;
+
+ default:
+ ASSERT_NOT_REACHED;
+ return FALSE;
+ }
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_select_operator (cairo_pdf_surface_t *surface,
+ cairo_operator_t op)
+{
+ cairo_int_status_t status;
+
+ if (op == surface->current_operator)
+ return CAIRO_STATUS_SUCCESS;
+
+ status = _cairo_pdf_operators_flush (&surface->pdf_operators);
+ if (unlikely (status))
+ return status;
+
+ _cairo_output_stream_printf (surface->output,
+ "/b%d gs\n", op);
+ surface->current_operator = op;
+ _cairo_pdf_surface_add_operator (surface, op);
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_select_pattern (cairo_pdf_surface_t *surface,
+ const cairo_pattern_t *pattern,
+ cairo_pdf_resource_t pattern_res,
+ cairo_bool_t is_stroke)
+{
+ cairo_int_status_t status;
+ int alpha;
+ const cairo_color_t *solid_color = NULL;
+
+ if (pattern->type == CAIRO_PATTERN_TYPE_SOLID) {
+ const cairo_solid_pattern_t *solid = (const cairo_solid_pattern_t *) pattern;
+
+ solid_color = &solid->color;
+ }
+
+ if (solid_color != NULL) {
+ if (surface->current_pattern_is_solid_color == FALSE ||
+ surface->current_color_red != solid_color->red ||
+ surface->current_color_green != solid_color->green ||
+ surface->current_color_blue != solid_color->blue ||
+ surface->current_color_is_stroke != is_stroke)
+ {
+ status = _cairo_pdf_operators_flush (&surface->pdf_operators);
+ if (unlikely (status))
+ return status;
+
+ _cairo_output_stream_printf (surface->output,
+ "%f %f %f ",
+ solid_color->red,
+ solid_color->green,
+ solid_color->blue);
+
+ if (is_stroke)
+ _cairo_output_stream_printf (surface->output, "RG ");
+ else
+ _cairo_output_stream_printf (surface->output, "rg ");
+
+ surface->current_color_red = solid_color->red;
+ surface->current_color_green = solid_color->green;
+ surface->current_color_blue = solid_color->blue;
+ surface->current_color_is_stroke = is_stroke;
+ }
+
+ if (surface->current_pattern_is_solid_color == FALSE ||
+ surface->current_color_alpha != solid_color->alpha)
+ {
+ status = _cairo_pdf_surface_add_alpha (surface, solid_color->alpha, &alpha);
+ if (unlikely (status))
+ return status;
+
+ status = _cairo_pdf_operators_flush (&surface->pdf_operators);
+ if (unlikely (status))
+ return status;
+
+ _cairo_output_stream_printf (surface->output,
+ "/a%d gs\n",
+ alpha);
+ surface->current_color_alpha = solid_color->alpha;
+ }
+
+ surface->current_pattern_is_solid_color = TRUE;
+ } else {
+ status = _cairo_pdf_surface_add_alpha (surface, 1.0, &alpha);
+ if (unlikely (status))
+ return status;
+
+ status = _cairo_pdf_surface_add_pattern (surface, pattern_res);
+ if (unlikely (status))
+ return status;
+
+ status = _cairo_pdf_operators_flush (&surface->pdf_operators);
+ if (unlikely (status))
+ return status;
+
+ /* fill-stroke calls select_pattern twice. Don't save if the
+ * gstate is already saved. */
+ if (!surface->select_pattern_gstate_saved)
+ _cairo_output_stream_printf (surface->output, "q ");
+
+ if (is_stroke) {
+ _cairo_output_stream_printf (surface->output,
+ "/Pattern CS /p%d SCN ",
+ pattern_res.id);
+ } else {
+ _cairo_output_stream_printf (surface->output,
+ "/Pattern cs /p%d scn ",
+ pattern_res.id);
+ }
+ _cairo_output_stream_printf (surface->output,
+ "/a%d gs\n",
+ alpha);
+ surface->select_pattern_gstate_saved = TRUE;
+ surface->current_pattern_is_solid_color = FALSE;
+ }
+
+ return _cairo_output_stream_get_status (surface->output);
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_unselect_pattern (cairo_pdf_surface_t *surface)
+{
+ cairo_int_status_t status;
+
+ if (surface->select_pattern_gstate_saved) {
+ status = _cairo_pdf_operators_flush (&surface->pdf_operators);
+ if (unlikely (status))
+ return status;
+
+ _cairo_output_stream_printf (surface->output, "Q\n");
+ _cairo_pdf_operators_reset (&surface->pdf_operators);
+ surface->current_pattern_is_solid_color = FALSE;
+ }
+ surface->select_pattern_gstate_saved = FALSE;
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_show_page (void *abstract_surface)
+{
+ cairo_pdf_surface_t *surface = abstract_surface;
+ cairo_int_status_t status;
+
+ status = _cairo_pdf_surface_close_content_stream (surface);
+ if (unlikely (status))
+ return status;
+
+ _cairo_surface_clipper_reset (&surface->clipper);
+
+ status = _cairo_pdf_surface_write_page (surface);
+ if (unlikely (status))
+ return status;
+
+ _cairo_pdf_surface_clear (surface);
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_bool_t
+_cairo_pdf_surface_get_extents (void *abstract_surface,
+ cairo_rectangle_int_t *rectangle)
+{
+ cairo_pdf_surface_t *surface = abstract_surface;
+
+ rectangle->x = 0;
+ rectangle->y = 0;
+
+ /* XXX: The conversion to integers here is pretty bogus, (not to
+ * mention the arbitrary limitation of width to a short(!). We
+ * may need to come up with a better interface for get_size.
+ */
+ rectangle->width = ceil (surface->width);
+ rectangle->height = ceil (surface->height);
+
+ return TRUE;
+}
+
+static void
+_cairo_pdf_surface_get_font_options (void *abstract_surface,
+ cairo_font_options_t *options)
+{
+ _cairo_font_options_init_default (options);
+
+ cairo_font_options_set_hint_style (options, CAIRO_HINT_STYLE_NONE);
+ cairo_font_options_set_hint_metrics (options, CAIRO_HINT_METRICS_OFF);
+ cairo_font_options_set_antialias (options, CAIRO_ANTIALIAS_GRAY);
+ _cairo_font_options_set_round_glyph_positions (options, CAIRO_ROUND_GLYPH_POS_OFF);
+}
+
+static cairo_pdf_resource_t
+_cairo_pdf_surface_write_info (cairo_pdf_surface_t *surface)
+{
+ cairo_pdf_resource_t info;
+
+ info = _cairo_pdf_surface_new_object (surface);
+ if (info.id == 0)
+ return info;
+
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n"
+ "<< /Creator (cairo %s (http://cairographics.org))\n"
+ " /Producer (cairo %s (http://cairographics.org))\n"
+ ">>\n"
+ "endobj\n",
+ info.id,
+ cairo_version_string (),
+ cairo_version_string ());
+
+ return info;
+}
+
+static void
+_cairo_pdf_surface_write_pages (cairo_pdf_surface_t *surface)
+{
+ cairo_pdf_resource_t page;
+ int num_pages, i;
+
+ _cairo_pdf_surface_update_object (surface, surface->pages_resource);
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n"
+ "<< /Type /Pages\n"
+ " /Kids [ ",
+ surface->pages_resource.id);
+
+ num_pages = _cairo_array_num_elements (&surface->pages);
+ for (i = 0; i < num_pages; i++) {
+ _cairo_array_copy_element (&surface->pages, i, &page);
+ _cairo_output_stream_printf (surface->output, "%d 0 R ", page.id);
+ }
+
+ _cairo_output_stream_printf (surface->output, "]\n");
+ _cairo_output_stream_printf (surface->output, " /Count %d\n", num_pages);
+
+
+ /* TODO: Figure out which other defaults to be inherited by /Page
+ * objects. */
+ _cairo_output_stream_printf (surface->output,
+ ">>\n"
+ "endobj\n");
+}
+
+static cairo_int_status_t
+_utf8_to_pdf_string (const char *utf8, char **str_out)
+{
+ int i;
+ int len;
+ cairo_bool_t ascii;
+ char *str;
+ cairo_int_status_t status = CAIRO_STATUS_SUCCESS;
+
+ ascii = TRUE;
+ len = strlen (utf8);
+ for (i = 0; i < len; i++) {
+ unsigned c = utf8[i];
+ if (c < 32 || c > 126 || c == '(' || c == ')' || c == '\\') {
+ ascii = FALSE;
+ break;
+ }
+ }
+
+ if (ascii) {
+ str = malloc (len + 3);
+ if (str == NULL)
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+
+ str[0] = '(';
+ for (i = 0; i < len; i++)
+ str[i+1] = utf8[i];
+ str[i+1] = ')';
+ str[i+2] = 0;
+ } else {
+ uint16_t *utf16 = NULL;
+ int utf16_len = 0;
+
+ status = _cairo_utf8_to_utf16 (utf8, -1, &utf16, &utf16_len);
+ if (unlikely (status))
+ return status;
+
+ str = malloc (utf16_len*4 + 7);
+ if (str == NULL) {
+ free (utf16);
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ }
+
+ strcpy (str, "<FEFF");
+ for (i = 0; i < utf16_len; i++)
+ snprintf (str + 4*i + 5, 5, "%04X", utf16[i]);
+
+ strcat (str, ">");
+ free (utf16);
+ }
+ *str_out = str;
+
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_emit_unicode_for_glyph (cairo_pdf_surface_t *surface,
+ const char *utf8)
+{
+ uint16_t *utf16 = NULL;
+ int utf16_len = 0;
+ cairo_int_status_t status;
+ int i;
+
+ if (utf8 && *utf8) {
+ status = _cairo_utf8_to_utf16 (utf8, -1, &utf16, &utf16_len);
+ if (unlikely (status))
+ return status;
+ }
+
+ _cairo_output_stream_printf (surface->output, "<");
+ if (utf16 == NULL || utf16_len == 0) {
+ /* According to the "ToUnicode Mapping File Tutorial"
+ * http://www.adobe.com/devnet/acrobat/pdfs/5411.ToUnicode.pdf
+ *
+ * Glyphs that do not map to a Unicode code point must be
+ * mapped to 0xfffd "REPLACEMENT CHARACTER".
+ */
+ _cairo_output_stream_printf (surface->output,
+ "fffd");
+ } else {
+ for (i = 0; i < utf16_len; i++)
+ _cairo_output_stream_printf (surface->output,
+ "%04x", (int) (utf16[i]));
+ }
+ _cairo_output_stream_printf (surface->output, ">");
+
+ free (utf16);
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+/* Bob Jenkins hash
+ *
+ * Public domain code from:
+ * http://burtleburtle.net/bob/hash/doobs.html
+ */
+
+#define HASH_MIX(a,b,c) \
+{ \
+ a -= b; a -= c; a ^= (c>>13); \
+ b -= c; b -= a; b ^= (a<<8); \
+ c -= a; c -= b; c ^= (b>>13); \
+ a -= b; a -= c; a ^= (c>>12); \
+ b -= c; b -= a; b ^= (a<<16); \
+ c -= a; c -= b; c ^= (b>>5); \
+ a -= b; a -= c; a ^= (c>>3); \
+ b -= c; b -= a; b ^= (a<<10); \
+ c -= a; c -= b; c ^= (b>>15); \
+}
+
+static uint32_t
+_hash_data (const unsigned char *data, int length, uint32_t initval)
+{
+ uint32_t a, b, c, len;
+
+ len = length;
+ a = b = 0x9e3779b9; /* the golden ratio; an arbitrary value */
+ c = initval; /* the previous hash value */
+
+ while (len >= 12) {
+ a += (data[0] + ((uint32_t)data[1]<<8) + ((uint32_t)data[2]<<16) + ((uint32_t)data[3]<<24));
+ b += (data[4] + ((uint32_t)data[5]<<8) + ((uint32_t)data[6]<<16) + ((uint32_t)data[7]<<24));
+ c += (data[8] + ((uint32_t)data[9]<<8) + ((uint32_t)data[10]<<16)+ ((uint32_t)data[11]<<24));
+ HASH_MIX (a,b,c);
+ data += 12;
+ len -= 12;
+ }
+
+ c += length;
+ switch(len) {
+ case 11: c+= ((uint32_t) data[10] << 24);
+ case 10: c+= ((uint32_t) data[9] << 16);
+ case 9 : c+= ((uint32_t) data[8] << 8);
+ case 8 : b+= ((uint32_t) data[7] << 24);
+ case 7 : b+= ((uint32_t) data[6] << 16);
+ case 6 : b+= ((uint32_t) data[5] << 8);
+ case 5 : b+= data[4];
+ case 4 : a+= ((uint32_t) data[3] << 24);
+ case 3 : a+= ((uint32_t) data[2] << 16);
+ case 2 : a+= ((uint32_t) data[1] << 8);
+ case 1 : a+= data[0];
+ }
+ HASH_MIX (a,b,c);
+
+ return c;
+}
+
+static void
+_create_font_subset_tag (cairo_scaled_font_subset_t *font_subset,
+ const char *font_name,
+ char *tag)
+{
+ uint32_t hash;
+ int i;
+ long numerator;
+ ldiv_t d;
+
+ hash = _hash_data ((unsigned char *) font_name, strlen(font_name), 0);
+ hash = _hash_data ((unsigned char *) (font_subset->glyphs),
+ font_subset->num_glyphs * sizeof(unsigned long), hash);
+
+ numerator = abs (hash);
+ for (i = 0; i < 6; i++) {
+ d = ldiv (numerator, 26);
+ numerator = d.quot;
+ tag[i] = 'A' + d.rem;
+ }
+ tag[i] = 0;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_emit_to_unicode_stream (cairo_pdf_surface_t *surface,
+ cairo_scaled_font_subset_t *font_subset,
+ cairo_pdf_resource_t *stream)
+{
+ unsigned int i, num_bfchar;
+ cairo_int_status_t status;
+
+ stream->id = 0;
+
+ status = _cairo_pdf_surface_open_stream (surface,
+ NULL,
+ surface->compress_content,
+ NULL);
+ if (unlikely (status))
+ return status;
+
+ _cairo_output_stream_printf (surface->output,
+ "/CIDInit /ProcSet findresource begin\n"
+ "12 dict begin\n"
+ "begincmap\n"
+ "/CIDSystemInfo\n"
+ "<< /Registry (Adobe)\n"
+ " /Ordering (UCS)\n"
+ " /Supplement 0\n"
+ ">> def\n"
+ "/CMapName /Adobe-Identity-UCS def\n"
+ "/CMapType 2 def\n"
+ "1 begincodespacerange\n");
+
+ if (font_subset->is_composite && !font_subset->is_latin) {
+ _cairo_output_stream_printf (surface->output,
+ "<0000> <ffff>\n");
+ } else {
+ _cairo_output_stream_printf (surface->output,
+ "<00> <ff>\n");
+ }
+
+ _cairo_output_stream_printf (surface->output,
+ "endcodespacerange\n");
+
+ if (font_subset->is_scaled) {
+ /* Type 3 fonts include glyph 0 in the subset */
+ num_bfchar = font_subset->num_glyphs;
+
+ /* The CMap specification has a limit of 100 characters per beginbfchar operator */
+ _cairo_output_stream_printf (surface->output,
+ "%d beginbfchar\n",
+ num_bfchar > 100 ? 100 : num_bfchar);
+
+ for (i = 0; i < num_bfchar; i++) {
+ if (i != 0 && i % 100 == 0) {
+ _cairo_output_stream_printf (surface->output,
+ "endbfchar\n"
+ "%d beginbfchar\n",
+ num_bfchar - i > 100 ? 100 : num_bfchar - i);
+ }
+ _cairo_output_stream_printf (surface->output, "<%02x> ", i);
+ status = _cairo_pdf_surface_emit_unicode_for_glyph (surface,
+ font_subset->utf8[i]);
+ if (unlikely (status))
+ return status;
+
+ _cairo_output_stream_printf (surface->output,
+ "\n");
+ }
+ } else {
+ /* Other fonts reserve glyph 0 for .notdef. Omit glyph 0 from the /ToUnicode map */
+ num_bfchar = font_subset->num_glyphs - 1;
+
+ /* The CMap specification has a limit of 100 characters per beginbfchar operator */
+ _cairo_output_stream_printf (surface->output,
+ "%d beginbfchar\n",
+ num_bfchar > 100 ? 100 : num_bfchar);
+
+ for (i = 0; i < num_bfchar; i++) {
+ if (i != 0 && i % 100 == 0) {
+ _cairo_output_stream_printf (surface->output,
+ "endbfchar\n"
+ "%d beginbfchar\n",
+ num_bfchar - i > 100 ? 100 : num_bfchar - i);
+ }
+ if (font_subset->is_latin)
+ _cairo_output_stream_printf (surface->output, "<%02x> ", font_subset->to_latin_char[i + 1]);
+ else if (font_subset->is_composite)
+ _cairo_output_stream_printf (surface->output, "<%04x> ", i + 1);
+ else
+ _cairo_output_stream_printf (surface->output, "<%02x> ", i + 1);
+
+ status = _cairo_pdf_surface_emit_unicode_for_glyph (surface,
+ font_subset->utf8[i + 1]);
+ if (unlikely (status))
+ return status;
+
+ _cairo_output_stream_printf (surface->output,
+ "\n");
+ }
+ }
+
+ _cairo_output_stream_printf (surface->output,
+ "endbfchar\n");
+
+ _cairo_output_stream_printf (surface->output,
+ "endcmap\n"
+ "CMapName currentdict /CMap defineresource pop\n"
+ "end\n"
+ "end\n");
+
+ *stream = surface->pdf_stream.self;
+ return _cairo_pdf_surface_close_stream (surface);
+}
+
+#define PDF_UNITS_PER_EM 1000
+
+static cairo_int_status_t
+_cairo_pdf_surface_emit_cff_font (cairo_pdf_surface_t *surface,
+ cairo_scaled_font_subset_t *font_subset,
+ cairo_cff_subset_t *subset)
+{
+ cairo_pdf_resource_t stream, descriptor, cidfont_dict;
+ cairo_pdf_resource_t subset_resource, to_unicode_stream;
+ cairo_pdf_font_t font;
+ unsigned int i, last_glyph;
+ cairo_int_status_t status;
+ char tag[10];
+
+ _create_font_subset_tag (font_subset, subset->ps_name, tag);
+
+ subset_resource = _cairo_pdf_surface_get_font_resource (surface,
+ font_subset->font_id,
+ font_subset->subset_id);
+ if (subset_resource.id == 0)
+ return CAIRO_STATUS_SUCCESS;
+
+ status = _cairo_pdf_surface_open_stream (surface,
+ NULL,
+ TRUE,
+ font_subset->is_latin ?
+ " /Subtype /Type1C\n" :
+ " /Subtype /CIDFontType0C\n");
+ if (unlikely (status))
+ return status;
+
+ stream = surface->pdf_stream.self;
+ _cairo_output_stream_write (surface->output,
+ subset->data, subset->data_length);
+ status = _cairo_pdf_surface_close_stream (surface);
+ if (unlikely (status))
+ return status;
+
+ status = _cairo_pdf_surface_emit_to_unicode_stream (surface,
+ font_subset,
+ &to_unicode_stream);
+ if (_cairo_int_status_is_error (status))
+ return status;
+
+ descriptor = _cairo_pdf_surface_new_object (surface);
+ if (descriptor.id == 0)
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n"
+ "<< /Type /FontDescriptor\n"
+ " /FontName /%s+%s\n",
+ descriptor.id,
+ tag,
+ subset->ps_name);
+
+ if (subset->family_name_utf8) {
+ char *pdf_str;
+
+ status = _utf8_to_pdf_string (subset->family_name_utf8, &pdf_str);
+ if (unlikely (status))
+ return status;
+
+ _cairo_output_stream_printf (surface->output,
+ " /FontFamily %s\n",
+ pdf_str);
+ free (pdf_str);
+ }
+
+ _cairo_output_stream_printf (surface->output,
+ " /Flags 4\n"
+ " /FontBBox [ %ld %ld %ld %ld ]\n"
+ " /ItalicAngle 0\n"
+ " /Ascent %ld\n"
+ " /Descent %ld\n"
+ " /CapHeight %ld\n"
+ " /StemV 80\n"
+ " /StemH 80\n"
+ " /FontFile3 %u 0 R\n"
+ ">>\n"
+ "endobj\n",
+ (long)(subset->x_min*PDF_UNITS_PER_EM),
+ (long)(subset->y_min*PDF_UNITS_PER_EM),
+ (long)(subset->x_max*PDF_UNITS_PER_EM),
+ (long)(subset->y_max*PDF_UNITS_PER_EM),
+ (long)(subset->ascent*PDF_UNITS_PER_EM),
+ (long)(subset->descent*PDF_UNITS_PER_EM),
+ (long)(subset->y_max*PDF_UNITS_PER_EM),
+ stream.id);
+
+ if (font_subset->is_latin) {
+ /* find last glyph used */
+ for (i = 255; i >= 32; i--)
+ if (font_subset->latin_to_subset_glyph_index[i] > 0)
+ break;
+
+ last_glyph = i;
+ _cairo_pdf_surface_update_object (surface, subset_resource);
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n"
+ "<< /Type /Font\n"
+ " /Subtype /Type1\n"
+ " /BaseFont /%s+%s\n"
+ " /FirstChar 32\n"
+ " /LastChar %d\n"
+ " /FontDescriptor %d 0 R\n"
+ " /Encoding /WinAnsiEncoding\n"
+ " /Widths [",
+ subset_resource.id,
+ tag,
+ subset->ps_name,
+ last_glyph,
+ descriptor.id);
+
+ for (i = 32; i < last_glyph + 1; i++) {
+ int glyph = font_subset->latin_to_subset_glyph_index[i];
+ if (glyph > 0) {
+ _cairo_output_stream_printf (surface->output,
+ " %ld",
+ (long)(subset->widths[glyph]*PDF_UNITS_PER_EM));
+ } else {
+ _cairo_output_stream_printf (surface->output, " 0");
+ }
+ }
+
+ _cairo_output_stream_printf (surface->output,
+ " ]\n");
+
+ if (to_unicode_stream.id != 0)
+ _cairo_output_stream_printf (surface->output,
+ " /ToUnicode %d 0 R\n",
+ to_unicode_stream.id);
+
+ _cairo_output_stream_printf (surface->output,
+ ">>\n"
+ "endobj\n");
+ } else {
+ cidfont_dict = _cairo_pdf_surface_new_object (surface);
+ if (cidfont_dict.id == 0)
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n"
+ "<< /Type /Font\n"
+ " /Subtype /CIDFontType0\n"
+ " /BaseFont /%s+%s\n"
+ " /CIDSystemInfo\n"
+ " << /Registry (Adobe)\n"
+ " /Ordering (Identity)\n"
+ " /Supplement 0\n"
+ " >>\n"
+ " /FontDescriptor %d 0 R\n"
+ " /W [0 [",
+ cidfont_dict.id,
+ tag,
+ subset->ps_name,
+ descriptor.id);
+
+ for (i = 0; i < font_subset->num_glyphs; i++)
+ _cairo_output_stream_printf (surface->output,
+ " %ld",
+ (long)(subset->widths[i]*PDF_UNITS_PER_EM));
+
+ _cairo_output_stream_printf (surface->output,
+ " ]]\n"
+ ">>\n"
+ "endobj\n");
+
+ _cairo_pdf_surface_update_object (surface, subset_resource);
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n"
+ "<< /Type /Font\n"
+ " /Subtype /Type0\n"
+ " /BaseFont /%s+%s\n"
+ " /Encoding /Identity-H\n"
+ " /DescendantFonts [ %d 0 R]\n",
+ subset_resource.id,
+ tag,
+ subset->ps_name,
+ cidfont_dict.id);
+
+ if (to_unicode_stream.id != 0)
+ _cairo_output_stream_printf (surface->output,
+ " /ToUnicode %d 0 R\n",
+ to_unicode_stream.id);
+
+ _cairo_output_stream_printf (surface->output,
+ ">>\n"
+ "endobj\n");
+ }
+
+ font.font_id = font_subset->font_id;
+ font.subset_id = font_subset->subset_id;
+ font.subset_resource = subset_resource;
+ status = _cairo_array_append (&surface->fonts, &font);
+
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_emit_cff_font_subset (cairo_pdf_surface_t *surface,
+ cairo_scaled_font_subset_t *font_subset)
+{
+ cairo_int_status_t status;
+ cairo_cff_subset_t subset;
+ char name[64];
+
+ snprintf (name, sizeof name, "CairoFont-%d-%d",
+ font_subset->font_id, font_subset->subset_id);
+ status = _cairo_cff_subset_init (&subset, name, font_subset);
+ if (unlikely (status))
+ return status;
+
+ status = _cairo_pdf_surface_emit_cff_font (surface, font_subset, &subset);
+
+ _cairo_cff_subset_fini (&subset);
+
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_emit_cff_fallback_font (cairo_pdf_surface_t *surface,
+ cairo_scaled_font_subset_t *font_subset)
+{
+ cairo_int_status_t status;
+ cairo_cff_subset_t subset;
+ char name[64];
+
+ /* CFF fallback subsetting does not work with 8-bit glyphs unless
+ * they are a latin subset */
+ if (!font_subset->is_composite && !font_subset->is_latin)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ snprintf (name, sizeof name, "CairoFont-%d-%d",
+ font_subset->font_id, font_subset->subset_id);
+ status = _cairo_cff_fallback_init (&subset, name, font_subset);
+ if (unlikely (status))
+ return status;
+
+ status = _cairo_pdf_surface_emit_cff_font (surface, font_subset, &subset);
+
+ _cairo_cff_fallback_fini (&subset);
+
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_emit_type1_font (cairo_pdf_surface_t *surface,
+ cairo_scaled_font_subset_t *font_subset,
+ cairo_type1_subset_t *subset)
+{
+ cairo_pdf_resource_t stream, descriptor, subset_resource, to_unicode_stream;
+ cairo_pdf_font_t font;
+ cairo_int_status_t status;
+ unsigned long length;
+ unsigned int i, last_glyph;
+ char tag[10];
+
+ _create_font_subset_tag (font_subset, subset->base_font, tag);
+
+ subset_resource = _cairo_pdf_surface_get_font_resource (surface,
+ font_subset->font_id,
+ font_subset->subset_id);
+ if (subset_resource.id == 0)
+ return CAIRO_STATUS_SUCCESS;
+
+ length = subset->header_length + subset->data_length + subset->trailer_length;
+ status = _cairo_pdf_surface_open_stream (surface,
+ NULL,
+ TRUE,
+ " /Length1 %lu\n"
+ " /Length2 %lu\n"
+ " /Length3 %lu\n",
+ subset->header_length,
+ subset->data_length,
+ subset->trailer_length);
+ if (unlikely (status))
+ return status;
+
+ stream = surface->pdf_stream.self;
+ _cairo_output_stream_write (surface->output, subset->data, length);
+ status = _cairo_pdf_surface_close_stream (surface);
+ if (unlikely (status))
+ return status;
+
+ status = _cairo_pdf_surface_emit_to_unicode_stream (surface,
+ font_subset,
+ &to_unicode_stream);
+ if (_cairo_int_status_is_error (status))
+ return status;
+
+ last_glyph = font_subset->num_glyphs - 1;
+ if (font_subset->is_latin) {
+ /* find last glyph used */
+ for (i = 255; i >= 32; i--)
+ if (font_subset->latin_to_subset_glyph_index[i] > 0)
+ break;
+
+ last_glyph = i;
+ }
+
+ descriptor = _cairo_pdf_surface_new_object (surface);
+ if (descriptor.id == 0)
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n"
+ "<< /Type /FontDescriptor\n"
+ " /FontName /%s+%s\n"
+ " /Flags 4\n"
+ " /FontBBox [ %ld %ld %ld %ld ]\n"
+ " /ItalicAngle 0\n"
+ " /Ascent %ld\n"
+ " /Descent %ld\n"
+ " /CapHeight %ld\n"
+ " /StemV 80\n"
+ " /StemH 80\n"
+ " /FontFile %u 0 R\n"
+ ">>\n"
+ "endobj\n",
+ descriptor.id,
+ tag,
+ subset->base_font,
+ (long)(subset->x_min*PDF_UNITS_PER_EM),
+ (long)(subset->y_min*PDF_UNITS_PER_EM),
+ (long)(subset->x_max*PDF_UNITS_PER_EM),
+ (long)(subset->y_max*PDF_UNITS_PER_EM),
+ (long)(subset->ascent*PDF_UNITS_PER_EM),
+ (long)(subset->descent*PDF_UNITS_PER_EM),
+ (long)(subset->y_max*PDF_UNITS_PER_EM),
+ stream.id);
+
+ _cairo_pdf_surface_update_object (surface, subset_resource);
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n"
+ "<< /Type /Font\n"
+ " /Subtype /Type1\n"
+ " /BaseFont /%s+%s\n"
+ " /FirstChar %d\n"
+ " /LastChar %d\n"
+ " /FontDescriptor %d 0 R\n",
+ subset_resource.id,
+ tag,
+ subset->base_font,
+ font_subset->is_latin ? 32 : 0,
+ last_glyph,
+ descriptor.id);
+
+ if (font_subset->is_latin)
+ _cairo_output_stream_printf (surface->output, " /Encoding /WinAnsiEncoding\n");
+
+ _cairo_output_stream_printf (surface->output, " /Widths [");
+ if (font_subset->is_latin) {
+ for (i = 32; i < last_glyph + 1; i++) {
+ int glyph = font_subset->latin_to_subset_glyph_index[i];
+ if (glyph > 0) {
+ _cairo_output_stream_printf (surface->output,
+ " %ld",
+ (long)(subset->widths[glyph]*PDF_UNITS_PER_EM));
+ } else {
+ _cairo_output_stream_printf (surface->output, " 0");
+ }
+ }
+ } else {
+ for (i = 0; i < font_subset->num_glyphs; i++)
+ _cairo_output_stream_printf (surface->output,
+ " %ld",
+ (long)(subset->widths[i]*PDF_UNITS_PER_EM));
+ }
+
+ _cairo_output_stream_printf (surface->output,
+ " ]\n");
+
+ if (to_unicode_stream.id != 0)
+ _cairo_output_stream_printf (surface->output,
+ " /ToUnicode %d 0 R\n",
+ to_unicode_stream.id);
+
+ _cairo_output_stream_printf (surface->output,
+ ">>\n"
+ "endobj\n");
+
+ font.font_id = font_subset->font_id;
+ font.subset_id = font_subset->subset_id;
+ font.subset_resource = subset_resource;
+ return _cairo_array_append (&surface->fonts, &font);
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_emit_type1_font_subset (cairo_pdf_surface_t *surface,
+ cairo_scaled_font_subset_t *font_subset)
+{
+ cairo_int_status_t status;
+ cairo_type1_subset_t subset;
+ char name[64];
+
+ /* 16-bit glyphs not compatible with Type 1 fonts */
+ if (font_subset->is_composite && !font_subset->is_latin)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ snprintf (name, sizeof name, "CairoFont-%d-%d",
+ font_subset->font_id, font_subset->subset_id);
+ status = _cairo_type1_subset_init (&subset, name, font_subset, FALSE);
+ if (unlikely (status))
+ return status;
+
+ status = _cairo_pdf_surface_emit_type1_font (surface, font_subset, &subset);
+
+ _cairo_type1_subset_fini (&subset);
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_emit_type1_fallback_font (cairo_pdf_surface_t *surface,
+ cairo_scaled_font_subset_t *font_subset)
+{
+ cairo_int_status_t status;
+ cairo_type1_subset_t subset;
+ char name[64];
+
+ /* 16-bit glyphs not compatible with Type 1 fonts */
+ if (font_subset->is_composite && !font_subset->is_latin)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ snprintf (name, sizeof name, "CairoFont-%d-%d",
+ font_subset->font_id, font_subset->subset_id);
+ status = _cairo_type1_fallback_init_binary (&subset, name, font_subset);
+ if (unlikely (status))
+ return status;
+
+ status = _cairo_pdf_surface_emit_type1_font (surface, font_subset, &subset);
+
+ _cairo_type1_fallback_fini (&subset);
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_emit_truetype_font_subset (cairo_pdf_surface_t *surface,
+ cairo_scaled_font_subset_t *font_subset)
+{
+ cairo_pdf_resource_t stream, descriptor, cidfont_dict;
+ cairo_pdf_resource_t subset_resource, to_unicode_stream;
+ cairo_int_status_t status;
+ cairo_pdf_font_t font;
+ cairo_truetype_subset_t subset;
+ unsigned int i, last_glyph;
+ char tag[10];
+
+ subset_resource = _cairo_pdf_surface_get_font_resource (surface,
+ font_subset->font_id,
+ font_subset->subset_id);
+ if (subset_resource.id == 0)
+ return CAIRO_STATUS_SUCCESS;
+
+ status = _cairo_truetype_subset_init_pdf (&subset, font_subset);
+ if (unlikely (status))
+ return status;
+
+ _create_font_subset_tag (font_subset, subset.ps_name, tag);
+
+ status = _cairo_pdf_surface_open_stream (surface,
+ NULL,
+ TRUE,
+ " /Length1 %lu\n",
+ subset.data_length);
+ if (unlikely (status)) {
+ _cairo_truetype_subset_fini (&subset);
+ return status;
+ }
+
+ stream = surface->pdf_stream.self;
+ _cairo_output_stream_write (surface->output,
+ subset.data, subset.data_length);
+ status = _cairo_pdf_surface_close_stream (surface);
+ if (unlikely (status)) {
+ _cairo_truetype_subset_fini (&subset);
+ return status;
+ }
+
+ status = _cairo_pdf_surface_emit_to_unicode_stream (surface,
+ font_subset,
+ &to_unicode_stream);
+ if (_cairo_int_status_is_error (status)) {
+ _cairo_truetype_subset_fini (&subset);
+ return status;
+ }
+
+ descriptor = _cairo_pdf_surface_new_object (surface);
+ if (descriptor.id == 0) {
+ _cairo_truetype_subset_fini (&subset);
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ }
+
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n"
+ "<< /Type /FontDescriptor\n"
+ " /FontName /%s+%s\n",
+ descriptor.id,
+ tag,
+ subset.ps_name);
+
+ if (subset.family_name_utf8) {
+ char *pdf_str;
+
+ status = _utf8_to_pdf_string (subset.family_name_utf8, &pdf_str);
+ if (unlikely (status))
+ return status;
+
+ _cairo_output_stream_printf (surface->output,
+ " /FontFamily %s\n",
+ pdf_str);
+ free (pdf_str);
+ }
+
+ _cairo_output_stream_printf (surface->output,
+ " /Flags %d\n"
+ " /FontBBox [ %ld %ld %ld %ld ]\n"
+ " /ItalicAngle 0\n"
+ " /Ascent %ld\n"
+ " /Descent %ld\n"
+ " /CapHeight %ld\n"
+ " /StemV 80\n"
+ " /StemH 80\n"
+ " /FontFile2 %u 0 R\n"
+ ">>\n"
+ "endobj\n",
+ font_subset->is_latin ? 32 : 4,
+ (long)(subset.x_min*PDF_UNITS_PER_EM),
+ (long)(subset.y_min*PDF_UNITS_PER_EM),
+ (long)(subset.x_max*PDF_UNITS_PER_EM),
+ (long)(subset.y_max*PDF_UNITS_PER_EM),
+ (long)(subset.ascent*PDF_UNITS_PER_EM),
+ (long)(subset.descent*PDF_UNITS_PER_EM),
+ (long)(subset.y_max*PDF_UNITS_PER_EM),
+ stream.id);
+
+ if (font_subset->is_latin) {
+ /* find last glyph used */
+ for (i = 255; i >= 32; i--)
+ if (font_subset->latin_to_subset_glyph_index[i] > 0)
+ break;
+
+ last_glyph = i;
+ _cairo_pdf_surface_update_object (surface, subset_resource);
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n"
+ "<< /Type /Font\n"
+ " /Subtype /TrueType\n"
+ " /BaseFont /%s+%s\n"
+ " /FirstChar 32\n"
+ " /LastChar %d\n"
+ " /FontDescriptor %d 0 R\n"
+ " /Encoding /WinAnsiEncoding\n"
+ " /Widths [",
+ subset_resource.id,
+ tag,
+ subset.ps_name,
+ last_glyph,
+ descriptor.id);
+
+ for (i = 32; i < last_glyph + 1; i++) {
+ int glyph = font_subset->latin_to_subset_glyph_index[i];
+ if (glyph > 0) {
+ _cairo_output_stream_printf (surface->output,
+ " %ld",
+ (long)(subset.widths[glyph]*PDF_UNITS_PER_EM));
+ } else {
+ _cairo_output_stream_printf (surface->output, " 0");
+ }
+ }
+
+ _cairo_output_stream_printf (surface->output,
+ " ]\n");
+
+ if (to_unicode_stream.id != 0)
+ _cairo_output_stream_printf (surface->output,
+ " /ToUnicode %d 0 R\n",
+ to_unicode_stream.id);
+
+ _cairo_output_stream_printf (surface->output,
+ ">>\n"
+ "endobj\n");
+ } else {
+ cidfont_dict = _cairo_pdf_surface_new_object (surface);
+ if (cidfont_dict.id == 0) {
+ _cairo_truetype_subset_fini (&subset);
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ }
+
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n"
+ "<< /Type /Font\n"
+ " /Subtype /CIDFontType2\n"
+ " /BaseFont /%s+%s\n"
+ " /CIDSystemInfo\n"
+ " << /Registry (Adobe)\n"
+ " /Ordering (Identity)\n"
+ " /Supplement 0\n"
+ " >>\n"
+ " /FontDescriptor %d 0 R\n"
+ " /W [0 [",
+ cidfont_dict.id,
+ tag,
+ subset.ps_name,
+ descriptor.id);
+
+ for (i = 0; i < font_subset->num_glyphs; i++)
+ _cairo_output_stream_printf (surface->output,
+ " %ld",
+ (long)(subset.widths[i]*PDF_UNITS_PER_EM));
+
+ _cairo_output_stream_printf (surface->output,
+ " ]]\n"
+ ">>\n"
+ "endobj\n");
+
+ _cairo_pdf_surface_update_object (surface, subset_resource);
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n"
+ "<< /Type /Font\n"
+ " /Subtype /Type0\n"
+ " /BaseFont /%s+%s\n"
+ " /Encoding /Identity-H\n"
+ " /DescendantFonts [ %d 0 R]\n",
+ subset_resource.id,
+ tag,
+ subset.ps_name,
+ cidfont_dict.id);
+
+ if (to_unicode_stream.id != 0)
+ _cairo_output_stream_printf (surface->output,
+ " /ToUnicode %d 0 R\n",
+ to_unicode_stream.id);
+
+ _cairo_output_stream_printf (surface->output,
+ ">>\n"
+ "endobj\n");
+ }
+
+ font.font_id = font_subset->font_id;
+ font.subset_id = font_subset->subset_id;
+ font.subset_resource = subset_resource;
+ status = _cairo_array_append (&surface->fonts, &font);
+
+ _cairo_truetype_subset_fini (&subset);
+
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_pdf_emit_imagemask (cairo_image_surface_t *image,
+ cairo_output_stream_t *stream)
+{
+ uint8_t *byte, output_byte;
+ int row, col, num_cols;
+
+ /* The only image type supported by Type 3 fonts are 1-bit image
+ * masks */
+ assert (image->format == CAIRO_FORMAT_A1);
+
+ _cairo_output_stream_printf (stream,
+ "BI\n"
+ "/IM true\n"
+ "/W %d\n"
+ "/H %d\n"
+ "/BPC 1\n"
+ "/D [1 0]\n",
+ image->width,
+ image->height);
+
+ _cairo_output_stream_printf (stream,
+ "ID ");
+
+ num_cols = (image->width + 7) / 8;
+ for (row = 0; row < image->height; row++) {
+ byte = image->data + row * image->stride;
+ for (col = 0; col < num_cols; col++) {
+ output_byte = CAIRO_BITSWAP8_IF_LITTLE_ENDIAN (*byte);
+ _cairo_output_stream_write (stream, &output_byte, 1);
+ byte++;
+ }
+ }
+
+ _cairo_output_stream_printf (stream,
+ "\nEI\n");
+
+ return _cairo_output_stream_get_status (stream);
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_analyze_user_font_subset (cairo_scaled_font_subset_t *font_subset,
+ void *closure)
+{
+ cairo_pdf_surface_t *surface = closure;
+ cairo_int_status_t status = CAIRO_INT_STATUS_SUCCESS;
+ cairo_int_status_t status2;
+ unsigned int i;
+ cairo_surface_t *type3_surface;
+ cairo_output_stream_t *null_stream;
+
+ null_stream = _cairo_null_stream_create ();
+ type3_surface = _cairo_type3_glyph_surface_create (font_subset->scaled_font,
+ null_stream,
+ _cairo_pdf_emit_imagemask,
+ surface->font_subsets,
+ FALSE);
+ if (unlikely (type3_surface->status)) {
+ status2 = _cairo_output_stream_destroy (null_stream);
+ return type3_surface->status;
+ }
+
+ _cairo_type3_glyph_surface_set_font_subsets_callback (type3_surface,
+ _cairo_pdf_surface_add_font,
+ surface);
+
+ for (i = 0; i < font_subset->num_glyphs; i++) {
+ status = _cairo_type3_glyph_surface_analyze_glyph (type3_surface,
+ font_subset->glyphs[i]);
+ if (unlikely (status))
+ break;
+ }
+
+ cairo_surface_destroy (type3_surface);
+ status2 = _cairo_output_stream_destroy (null_stream);
+ if (status == CAIRO_INT_STATUS_SUCCESS)
+ status = status2;
+
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_emit_type3_font_subset (cairo_pdf_surface_t *surface,
+ cairo_scaled_font_subset_t *font_subset)
+{
+ cairo_int_status_t status = CAIRO_STATUS_SUCCESS;
+ cairo_pdf_resource_t *glyphs, encoding, char_procs, subset_resource, to_unicode_stream;
+ cairo_pdf_font_t font;
+ double *widths;
+ unsigned int i;
+ cairo_box_t font_bbox = {{0,0},{0,0}};
+ cairo_box_t bbox = {{0,0},{0,0}};
+ cairo_surface_t *type3_surface;
+
+ if (font_subset->num_glyphs == 0)
+ return CAIRO_STATUS_SUCCESS;
+
+ subset_resource = _cairo_pdf_surface_get_font_resource (surface,
+ font_subset->font_id,
+ font_subset->subset_id);
+ if (subset_resource.id == 0)
+ return CAIRO_STATUS_SUCCESS;
+
+ glyphs = _cairo_malloc_ab (font_subset->num_glyphs, sizeof (cairo_pdf_resource_t));
+ if (unlikely (glyphs == NULL))
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+
+ widths = _cairo_malloc_ab (font_subset->num_glyphs, sizeof (double));
+ if (unlikely (widths == NULL)) {
+ free (glyphs);
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ }
+
+ _cairo_pdf_group_resources_clear (&surface->resources);
+ type3_surface = _cairo_type3_glyph_surface_create (font_subset->scaled_font,
+ NULL,
+ _cairo_pdf_emit_imagemask,
+ surface->font_subsets,
+ FALSE);
+ if (unlikely (type3_surface->status)) {
+ free (glyphs);
+ free (widths);
+ return type3_surface->status;
+ }
+
+ _cairo_type3_glyph_surface_set_font_subsets_callback (type3_surface,
+ _cairo_pdf_surface_add_font,
+ surface);
+
+ for (i = 0; i < font_subset->num_glyphs; i++) {
+ status = _cairo_pdf_surface_open_stream (surface,
+ NULL,
+ surface->compress_content,
+ NULL);
+ if (unlikely (status))
+ break;
+
+ glyphs[i] = surface->pdf_stream.self;
+ status = _cairo_type3_glyph_surface_emit_glyph (type3_surface,
+ surface->output,
+ font_subset->glyphs[i],
+ &bbox,
+ &widths[i]);
+ if (unlikely (status))
+ break;
+
+ status = _cairo_pdf_surface_close_stream (surface);
+ if (unlikely (status))
+ break;
+
+ if (i == 0) {
+ font_bbox.p1.x = bbox.p1.x;
+ font_bbox.p1.y = bbox.p1.y;
+ font_bbox.p2.x = bbox.p2.x;
+ font_bbox.p2.y = bbox.p2.y;
+ } else {
+ if (bbox.p1.x < font_bbox.p1.x)
+ font_bbox.p1.x = bbox.p1.x;
+ if (bbox.p1.y < font_bbox.p1.y)
+ font_bbox.p1.y = bbox.p1.y;
+ if (bbox.p2.x > font_bbox.p2.x)
+ font_bbox.p2.x = bbox.p2.x;
+ if (bbox.p2.y > font_bbox.p2.y)
+ font_bbox.p2.y = bbox.p2.y;
+ }
+ }
+ cairo_surface_destroy (type3_surface);
+ if (unlikely (status)) {
+ free (glyphs);
+ free (widths);
+ return status;
+ }
+
+ encoding = _cairo_pdf_surface_new_object (surface);
+ if (encoding.id == 0) {
+ free (glyphs);
+ free (widths);
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ }
+
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n"
+ "<< /Type /Encoding\n"
+ " /Differences [0", encoding.id);
+ for (i = 0; i < font_subset->num_glyphs; i++)
+ _cairo_output_stream_printf (surface->output,
+ " /%d", i);
+ _cairo_output_stream_printf (surface->output,
+ "]\n"
+ ">>\n"
+ "endobj\n");
+
+ char_procs = _cairo_pdf_surface_new_object (surface);
+ if (char_procs.id == 0) {
+ free (glyphs);
+ free (widths);
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ }
+
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n"
+ "<<\n", char_procs.id);
+ for (i = 0; i < font_subset->num_glyphs; i++)
+ _cairo_output_stream_printf (surface->output,
+ " /%d %d 0 R\n",
+ i, glyphs[i].id);
+ _cairo_output_stream_printf (surface->output,
+ ">>\n"
+ "endobj\n");
+
+ free (glyphs);
+
+ status = _cairo_pdf_surface_emit_to_unicode_stream (surface,
+ font_subset,
+ &to_unicode_stream);
+ if (_cairo_int_status_is_error (status)) {
+ free (widths);
+ return status;
+ }
+
+ _cairo_pdf_surface_update_object (surface, subset_resource);
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n"
+ "<< /Type /Font\n"
+ " /Subtype /Type3\n"
+ " /FontBBox [%f %f %f %f]\n"
+ " /FontMatrix [ 1 0 0 1 0 0 ]\n"
+ " /Encoding %d 0 R\n"
+ " /CharProcs %d 0 R\n"
+ " /FirstChar 0\n"
+ " /LastChar %d\n",
+ subset_resource.id,
+ _cairo_fixed_to_double (font_bbox.p1.x),
+ - _cairo_fixed_to_double (font_bbox.p2.y),
+ _cairo_fixed_to_double (font_bbox.p2.x),
+ - _cairo_fixed_to_double (font_bbox.p1.y),
+ encoding.id,
+ char_procs.id,
+ font_subset->num_glyphs - 1);
+
+ _cairo_output_stream_printf (surface->output,
+ " /Widths [");
+ for (i = 0; i < font_subset->num_glyphs; i++)
+ _cairo_output_stream_printf (surface->output, " %f", widths[i]);
+ _cairo_output_stream_printf (surface->output,
+ "]\n");
+ free (widths);
+
+ _cairo_output_stream_printf (surface->output,
+ " /Resources\n");
+ _cairo_pdf_surface_emit_group_resources (surface, &surface->resources);
+
+ if (to_unicode_stream.id != 0)
+ _cairo_output_stream_printf (surface->output,
+ " /ToUnicode %d 0 R\n",
+ to_unicode_stream.id);
+
+ _cairo_output_stream_printf (surface->output,
+ ">>\n"
+ "endobj\n");
+
+ font.font_id = font_subset->font_id;
+ font.subset_id = font_subset->subset_id;
+ font.subset_resource = subset_resource;
+ return _cairo_array_append (&surface->fonts, &font);
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_emit_unscaled_font_subset (cairo_scaled_font_subset_t *font_subset,
+ void *closure)
+{
+ cairo_pdf_surface_t *surface = closure;
+ cairo_int_status_t status;
+
+ status = _cairo_pdf_surface_emit_cff_font_subset (surface, font_subset);
+ if (status != CAIRO_INT_STATUS_UNSUPPORTED)
+ return status;
+
+ status = _cairo_pdf_surface_emit_truetype_font_subset (surface, font_subset);
+ if (status != CAIRO_INT_STATUS_UNSUPPORTED)
+ return status;
+
+ status = _cairo_pdf_surface_emit_type1_font_subset (surface, font_subset);
+ if (status != CAIRO_INT_STATUS_UNSUPPORTED)
+ return status;
+
+ status = _cairo_pdf_surface_emit_cff_fallback_font (surface, font_subset);
+ if (status != CAIRO_INT_STATUS_UNSUPPORTED)
+ return status;
+
+ status = _cairo_pdf_surface_emit_type1_fallback_font (surface, font_subset);
+ if (status != CAIRO_INT_STATUS_UNSUPPORTED)
+ return status;
+
+ ASSERT_NOT_REACHED;
+ return CAIRO_INT_STATUS_SUCCESS;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_emit_scaled_font_subset (cairo_scaled_font_subset_t *font_subset,
+ void *closure)
+{
+ cairo_pdf_surface_t *surface = closure;
+ cairo_int_status_t status;
+
+ status = _cairo_pdf_surface_emit_type3_font_subset (surface, font_subset);
+ if (status != CAIRO_INT_STATUS_UNSUPPORTED)
+ return status;
+
+ ASSERT_NOT_REACHED;
+ return CAIRO_INT_STATUS_SUCCESS;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_emit_font_subsets (cairo_pdf_surface_t *surface)
+{
+ cairo_int_status_t status;
+
+ status = _cairo_scaled_font_subsets_foreach_user (surface->font_subsets,
+ _cairo_pdf_surface_analyze_user_font_subset,
+ surface);
+ if (unlikely (status))
+ goto BAIL;
+
+ status = _cairo_scaled_font_subsets_foreach_unscaled (surface->font_subsets,
+ _cairo_pdf_surface_emit_unscaled_font_subset,
+ surface);
+ if (unlikely (status))
+ goto BAIL;
+
+ status = _cairo_scaled_font_subsets_foreach_scaled (surface->font_subsets,
+ _cairo_pdf_surface_emit_scaled_font_subset,
+ surface);
+ if (unlikely (status))
+ goto BAIL;
+
+ status = _cairo_scaled_font_subsets_foreach_user (surface->font_subsets,
+ _cairo_pdf_surface_emit_scaled_font_subset,
+ surface);
+
+BAIL:
+ _cairo_scaled_font_subsets_destroy (surface->font_subsets);
+ surface->font_subsets = NULL;
+
+ return status;
+}
+
+static cairo_pdf_resource_t
+_cairo_pdf_surface_write_catalog (cairo_pdf_surface_t *surface)
+{
+ cairo_pdf_resource_t catalog;
+
+ catalog = _cairo_pdf_surface_new_object (surface);
+ if (catalog.id == 0)
+ return catalog;
+
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n"
+ "<< /Type /Catalog\n"
+ " /Pages %d 0 R\n"
+ ">>\n"
+ "endobj\n",
+ catalog.id,
+ surface->pages_resource.id);
+
+ return catalog;
+}
+
+static long
+_cairo_pdf_surface_write_xref (cairo_pdf_surface_t *surface)
+{
+ cairo_pdf_object_t *object;
+ int num_objects, i;
+ long offset;
+ char buffer[11];
+
+ num_objects = _cairo_array_num_elements (&surface->objects);
+
+ offset = _cairo_output_stream_get_position (surface->output);
+ _cairo_output_stream_printf (surface->output,
+ "xref\n"
+ "%d %d\n",
+ 0, num_objects + 1);
+
+ _cairo_output_stream_printf (surface->output,
+ "0000000000 65535 f \n");
+ for (i = 0; i < num_objects; i++) {
+ object = _cairo_array_index (&surface->objects, i);
+ snprintf (buffer, sizeof buffer, "%010ld", object->offset);
+ _cairo_output_stream_printf (surface->output,
+ "%s 00000 n \n", buffer);
+ }
+
+ return offset;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_write_mask_group (cairo_pdf_surface_t *surface,
+ cairo_pdf_smask_group_t *group)
+{
+ cairo_pdf_resource_t mask_group;
+ cairo_pdf_resource_t smask;
+ cairo_pdf_smask_group_t *smask_group;
+ cairo_pdf_resource_t pattern_res, gstate_res;
+ cairo_int_status_t status;
+ cairo_box_double_t bbox;
+
+ /* Create mask group */
+ _get_bbox_from_extents (group->height, &group->extents, &bbox);
+ status = _cairo_pdf_surface_open_group (surface, &bbox, NULL);
+ if (unlikely (status))
+ return status;
+
+ if (_can_paint_pattern (group->mask)) {
+ _cairo_output_stream_printf (surface->output, "q\n");
+ status = _cairo_pdf_surface_paint_pattern (surface,
+ CAIRO_OPERATOR_OVER,
+ group->mask,
+ &group->extents,
+ FALSE);
+ if (unlikely (status))
+ return status;
+
+ _cairo_output_stream_printf (surface->output, "Q\n");
+ } else {
+ pattern_res.id = 0;
+ gstate_res.id = 0;
+ status = _cairo_pdf_surface_add_pdf_pattern (surface, group->mask,
+ CAIRO_OPERATOR_OVER,
+ NULL,
+ &pattern_res, &gstate_res);
+ if (unlikely (status))
+ return status;
+
+ if (gstate_res.id != 0) {
+ smask_group = _cairo_pdf_surface_create_smask_group (surface, &group->extents);
+ if (unlikely (smask_group == NULL))
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+
+ smask_group->width = group->width;
+ smask_group->height = group->height;
+ smask_group->operation = PDF_PAINT;
+ smask_group->source = cairo_pattern_reference (group->mask);
+ smask_group->source_res = pattern_res;
+ status = _cairo_pdf_surface_add_smask_group (surface, smask_group);
+ if (unlikely (status)) {
+ _cairo_pdf_smask_group_destroy (smask_group);
+ return status;
+ }
+
+ status = _cairo_pdf_surface_add_smask (surface, gstate_res);
+ if (unlikely (status))
+ return status;
+
+ status = _cairo_pdf_surface_add_xobject (surface, smask_group->group_res);
+ if (unlikely (status))
+ return status;
+
+ _cairo_output_stream_printf (surface->output,
+ "q /s%d gs /x%d Do Q\n",
+ gstate_res.id,
+ smask_group->group_res.id);
+ } else {
+ status = _cairo_pdf_surface_select_pattern (surface, group->mask, pattern_res, FALSE);
+ if (unlikely (status))
+ return status;
+
+ _cairo_output_stream_printf (surface->output,
+ "%f %f %f %f re f\n",
+ bbox.p1.x,
+ bbox.p1.y,
+ bbox.p2.x - bbox.p1.x,
+ bbox.p2.y - bbox.p1.y);
+
+ status = _cairo_pdf_surface_unselect_pattern (surface);
+ if (unlikely (status))
+ return status;
+ }
+ }
+
+ status = _cairo_pdf_surface_close_group (surface, &mask_group);
+ if (unlikely (status))
+ return status;
+
+ /* Create source group */
+ status = _cairo_pdf_surface_open_group (surface, &bbox, &group->source_res);
+ if (unlikely (status))
+ return status;
+
+ if (_can_paint_pattern (group->source)) {
+ _cairo_output_stream_printf (surface->output, "q\n");
+ status = _cairo_pdf_surface_paint_pattern (surface,
+ CAIRO_OPERATOR_OVER,
+ group->source,
+ &group->extents,
+ FALSE);
+ if (unlikely (status))
+ return status;
+
+ _cairo_output_stream_printf (surface->output, "Q\n");
+ } else {
+ pattern_res.id = 0;
+ gstate_res.id = 0;
+ status = _cairo_pdf_surface_add_pdf_pattern (surface, group->source,
+ CAIRO_OPERATOR_OVER,
+ NULL,
+ &pattern_res, &gstate_res);
+ if (unlikely (status))
+ return status;
+
+ if (gstate_res.id != 0) {
+ smask_group = _cairo_pdf_surface_create_smask_group (surface, &group->extents);
+ if (unlikely (smask_group == NULL))
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+
+ smask_group->operation = PDF_PAINT;
+ smask_group->source = cairo_pattern_reference (group->source);
+ smask_group->source_res = pattern_res;
+ status = _cairo_pdf_surface_add_smask_group (surface, smask_group);
+ if (unlikely (status)) {
+ _cairo_pdf_smask_group_destroy (smask_group);
+ return status;
+ }
+
+ status = _cairo_pdf_surface_add_smask (surface, gstate_res);
+ if (unlikely (status))
+ return status;
+
+ status = _cairo_pdf_surface_add_xobject (surface, smask_group->group_res);
+ if (unlikely (status))
+ return status;
+
+ _cairo_output_stream_printf (surface->output,
+ "q /s%d gs /x%d Do Q\n",
+ gstate_res.id,
+ smask_group->group_res.id);
+ } else {
+ status = _cairo_pdf_surface_select_pattern (surface, group->source, pattern_res, FALSE);
+ if (unlikely (status))
+ return status;
+
+ _cairo_output_stream_printf (surface->output,
+ "%f %f %f %f re f\n",
+ bbox.p1.x,
+ bbox.p1.y,
+ bbox.p2.x - bbox.p1.x,
+ bbox.p2.y - bbox.p1.y);
+
+ status = _cairo_pdf_surface_unselect_pattern (surface);
+ if (unlikely (status))
+ return status;
+ }
+ }
+
+ status = _cairo_pdf_surface_close_group (surface, NULL);
+ if (unlikely (status))
+ return status;
+
+ /* Create an smask based on the alpha component of mask_group */
+ smask = _cairo_pdf_surface_new_object (surface);
+ if (smask.id == 0)
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n"
+ "<< /Type /Mask\n"
+ " /S /Alpha\n"
+ " /G %d 0 R\n"
+ ">>\n"
+ "endobj\n",
+ smask.id,
+ mask_group.id);
+
+ /* Create a GState that uses the smask */
+ _cairo_pdf_surface_update_object (surface, group->group_res);
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n"
+ "<< /Type /ExtGState\n"
+ " /SMask %d 0 R\n"
+ " /ca 1\n"
+ " /CA 1\n"
+ " /AIS false\n"
+ ">>\n"
+ "endobj\n",
+ group->group_res.id,
+ smask.id);
+
+ return _cairo_output_stream_get_status (surface->output);
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_write_smask_group (cairo_pdf_surface_t *surface,
+ cairo_pdf_smask_group_t *group)
+{
+ double old_width, old_height;
+ cairo_int_status_t status;
+ cairo_box_double_t bbox;
+
+ old_width = surface->width;
+ old_height = surface->height;
+ _cairo_pdf_surface_set_size_internal (surface,
+ group->width,
+ group->height);
+ /* _mask is a special case that requires two groups - source
+ * and mask as well as a smask and gstate dictionary */
+ if (group->operation == PDF_MASK) {
+ status = _cairo_pdf_surface_write_mask_group (surface, group);
+ goto RESTORE_SIZE;
+ }
+
+ _get_bbox_from_extents (group->height, &group->extents, &bbox);
+ status = _cairo_pdf_surface_open_group (surface, &bbox, &group->group_res);
+ if (unlikely (status))
+ return status;
+
+ status = _cairo_pdf_surface_select_pattern (surface,
+ group->source,
+ group->source_res,
+ group->operation == PDF_STROKE);
+ if (unlikely (status))
+ return status;
+
+ switch (group->operation) {
+ case PDF_PAINT:
+ _cairo_output_stream_printf (surface->output,
+ "0 0 %f %f re f\n",
+ surface->width, surface->height);
+ break;
+ case PDF_MASK:
+ ASSERT_NOT_REACHED;
+ break;
+ case PDF_FILL:
+ status = _cairo_pdf_operators_fill (&surface->pdf_operators,
+ &group->path,
+ group->fill_rule);
+ break;
+ case PDF_STROKE:
+ status = _cairo_pdf_operators_stroke (&surface->pdf_operators,
+ &group->path,
+ &group->style,
+ &group->ctm,
+ &group->ctm_inverse);
+ break;
+ case PDF_SHOW_GLYPHS:
+ status = _cairo_pdf_operators_show_text_glyphs (&surface->pdf_operators,
+ group->utf8, group->utf8_len,
+ group->glyphs, group->num_glyphs,
+ group->clusters, group->num_clusters,
+ group->cluster_flags,
+ group->scaled_font);
+ break;
+ }
+ if (unlikely (status))
+ return status;
+
+ status = _cairo_pdf_surface_unselect_pattern (surface);
+ if (unlikely (status))
+ return status;
+
+ status = _cairo_pdf_surface_close_group (surface, NULL);
+
+RESTORE_SIZE:
+ _cairo_pdf_surface_set_size_internal (surface,
+ old_width,
+ old_height);
+
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_write_patterns_and_smask_groups (cairo_pdf_surface_t *surface)
+{
+ cairo_pdf_pattern_t pattern;
+ cairo_pdf_smask_group_t *group;
+ cairo_pdf_source_surface_t src_surface;
+ unsigned int pattern_index, group_index, surface_index;
+ cairo_int_status_t status;
+
+ /* Writing out PDF_MASK groups will cause additional smask groups
+ * to be appended to surface->smask_groups. Additional patterns
+ * may also be appended to surface->patterns.
+ *
+ * Writing recording surface patterns will cause additional patterns
+ * and groups to be appended.
+ */
+ pattern_index = 0;
+ group_index = 0;
+ surface_index = 0;
+ while ((pattern_index < _cairo_array_num_elements (&surface->page_patterns)) ||
+ (group_index < _cairo_array_num_elements (&surface->smask_groups)) ||
+ (surface_index < _cairo_array_num_elements (&surface->page_surfaces)))
+ {
+ for (; group_index < _cairo_array_num_elements (&surface->smask_groups); group_index++) {
+ _cairo_array_copy_element (&surface->smask_groups, group_index, &group);
+ status = _cairo_pdf_surface_write_smask_group (surface, group);
+ if (unlikely (status))
+ return status;
+ }
+
+ for (; pattern_index < _cairo_array_num_elements (&surface->page_patterns); pattern_index++) {
+ _cairo_array_copy_element (&surface->page_patterns, pattern_index, &pattern);
+ status = _cairo_pdf_surface_emit_pattern (surface, &pattern);
+ if (unlikely (status))
+ return status;
+ }
+
+ for (; surface_index < _cairo_array_num_elements (&surface->page_surfaces); surface_index++) {
+ _cairo_array_copy_element (&surface->page_surfaces, surface_index, &src_surface);
+ status = _cairo_pdf_surface_emit_surface (surface, &src_surface);
+ if (unlikely (status))
+ return status;
+ }
+ }
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_write_page (cairo_pdf_surface_t *surface)
+{
+ cairo_pdf_resource_t page, knockout, res;
+ cairo_int_status_t status;
+ unsigned int i, len;
+
+ _cairo_pdf_group_resources_clear (&surface->resources);
+ if (surface->has_fallback_images) {
+ cairo_rectangle_int_t extents;
+ cairo_box_double_t bbox;
+
+ extents.x = 0;
+ extents.y = 0;
+ extents.width = ceil (surface->width);
+ extents.height = ceil (surface->height);
+ _get_bbox_from_extents (surface->height, &extents, &bbox);
+ status = _cairo_pdf_surface_open_knockout_group (surface, &bbox);
+ if (unlikely (status))
+ return status;
+
+ len = _cairo_array_num_elements (&surface->knockout_group);
+ for (i = 0; i < len; i++) {
+ _cairo_array_copy_element (&surface->knockout_group, i, &res);
+ _cairo_output_stream_printf (surface->output,
+ "/x%d Do\n",
+ res.id);
+ status = _cairo_pdf_surface_add_xobject (surface, res);
+ if (unlikely (status))
+ return status;
+ }
+ _cairo_output_stream_printf (surface->output,
+ "/x%d Do\n",
+ surface->content.id);
+ status = _cairo_pdf_surface_add_xobject (surface, surface->content);
+ if (unlikely (status))
+ return status;
+
+ status = _cairo_pdf_surface_close_group (surface, &knockout);
+ if (unlikely (status))
+ return status;
+
+ _cairo_pdf_group_resources_clear (&surface->resources);
+ status = _cairo_pdf_surface_open_content_stream (surface, NULL, NULL, FALSE, FALSE);
+ if (unlikely (status))
+ return status;
+
+ _cairo_output_stream_printf (surface->output,
+ "/x%d Do\n",
+ knockout.id);
+ status = _cairo_pdf_surface_add_xobject (surface, knockout);
+ if (unlikely (status))
+ return status;
+
+ status = _cairo_pdf_surface_close_content_stream (surface);
+ if (unlikely (status))
+ return status;
+ }
+
+ page = _cairo_pdf_surface_new_object (surface);
+ if (page.id == 0)
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+
+ _cairo_output_stream_printf (surface->output,
+ "%d 0 obj\n"
+ "<< /Type /Page\n"
+ " /Parent %d 0 R\n"
+ " /MediaBox [ 0 0 %f %f ]\n"
+ " /Contents %d 0 R\n"
+ " /Group <<\n"
+ " /Type /Group\n"
+ " /S /Transparency\n"
+ " /I true\n"
+ " /CS /DeviceRGB\n"
+ " >>\n"
+ " /Resources %d 0 R\n"
+ ">>\n"
+ "endobj\n",
+ page.id,
+ surface->pages_resource.id,
+ surface->width,
+ surface->height,
+ surface->content.id,
+ surface->content_resources.id);
+
+ status = _cairo_array_append (&surface->pages, &page);
+ if (unlikely (status))
+ return status;
+
+ status = _cairo_pdf_surface_write_patterns_and_smask_groups (surface);
+ if (unlikely (status))
+ return status;
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_analyze_surface_pattern_transparency (cairo_pdf_surface_t *surface,
+ cairo_surface_pattern_t *pattern)
+{
+ cairo_image_surface_t *image;
+ void *image_extra;
+ cairo_int_status_t status;
+ cairo_image_transparency_t transparency;
+
+ status = _cairo_surface_acquire_source_image (pattern->surface,
+ &image,
+ &image_extra);
+ if (unlikely (status))
+ return status;
+
+ if (image->base.status)
+ return image->base.status;
+
+ transparency = _cairo_image_analyze_transparency (image);
+ if (transparency == CAIRO_IMAGE_IS_OPAQUE)
+ status = CAIRO_STATUS_SUCCESS;
+ else
+ status = CAIRO_INT_STATUS_FLATTEN_TRANSPARENCY;
+
+ _cairo_surface_release_source_image (pattern->surface, image, image_extra);
+
+ return status;
+}
+
+static cairo_bool_t
+_surface_pattern_supported (cairo_surface_pattern_t *pattern)
+{
+ cairo_extend_t extend;
+
+ if (pattern->surface->type == CAIRO_SURFACE_TYPE_RECORDING)
+ return TRUE;
+
+ if (pattern->surface->backend->acquire_source_image == NULL)
+ return FALSE;
+
+ /* Does an ALPHA-only source surface even make sense? Maybe, but I
+ * don't think it's worth the extra code to support it. */
+
+/* XXX: Need to write this function here...
+ if (pattern->surface->content == CAIRO_CONTENT_ALPHA)
+ return FALSE;
+*/
+
+ extend = cairo_pattern_get_extend (&pattern->base);
+ switch (extend) {
+ case CAIRO_EXTEND_NONE:
+ case CAIRO_EXTEND_REPEAT:
+ case CAIRO_EXTEND_REFLECT:
+ /* There's no point returning FALSE for EXTEND_PAD, as the image
+ * surface does not currently implement it either */
+ case CAIRO_EXTEND_PAD:
+ return TRUE;
+ }
+
+ ASSERT_NOT_REACHED;
+ return FALSE;
+}
+
+static cairo_bool_t
+_pattern_supported (const cairo_pattern_t *pattern)
+{
+ switch (pattern->type) {
+ case CAIRO_PATTERN_TYPE_SOLID:
+ case CAIRO_PATTERN_TYPE_LINEAR:
+ case CAIRO_PATTERN_TYPE_RADIAL:
+ case CAIRO_PATTERN_TYPE_MESH:
+ case CAIRO_PATTERN_TYPE_RASTER_SOURCE:
+ return TRUE;
+
+ case CAIRO_PATTERN_TYPE_SURFACE:
+ return _surface_pattern_supported ((cairo_surface_pattern_t *) pattern);
+
+ default:
+ ASSERT_NOT_REACHED;
+ return FALSE;
+ }
+}
+
+static cairo_bool_t
+_pdf_operator_supported (cairo_operator_t op)
+{
+ switch (op) {
+ case CAIRO_OPERATOR_OVER:
+ case CAIRO_OPERATOR_MULTIPLY:
+ case CAIRO_OPERATOR_SCREEN:
+ case CAIRO_OPERATOR_OVERLAY:
+ case CAIRO_OPERATOR_DARKEN:
+ case CAIRO_OPERATOR_LIGHTEN:
+ case CAIRO_OPERATOR_COLOR_DODGE:
+ case CAIRO_OPERATOR_COLOR_BURN:
+ case CAIRO_OPERATOR_HARD_LIGHT:
+ case CAIRO_OPERATOR_SOFT_LIGHT:
+ case CAIRO_OPERATOR_DIFFERENCE:
+ case CAIRO_OPERATOR_EXCLUSION:
+ case CAIRO_OPERATOR_HSL_HUE:
+ case CAIRO_OPERATOR_HSL_SATURATION:
+ case CAIRO_OPERATOR_HSL_COLOR:
+ case CAIRO_OPERATOR_HSL_LUMINOSITY:
+ return TRUE;
+
+ default:
+ case CAIRO_OPERATOR_CLEAR:
+ case CAIRO_OPERATOR_SOURCE:
+ case CAIRO_OPERATOR_IN:
+ case CAIRO_OPERATOR_OUT:
+ case CAIRO_OPERATOR_ATOP:
+ case CAIRO_OPERATOR_DEST:
+ case CAIRO_OPERATOR_DEST_OVER:
+ case CAIRO_OPERATOR_DEST_IN:
+ case CAIRO_OPERATOR_DEST_OUT:
+ case CAIRO_OPERATOR_DEST_ATOP:
+ case CAIRO_OPERATOR_XOR:
+ case CAIRO_OPERATOR_ADD:
+ case CAIRO_OPERATOR_SATURATE:
+ return FALSE;
+ }
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_analyze_operation (cairo_pdf_surface_t *surface,
+ cairo_operator_t op,
+ const cairo_pattern_t *pattern,
+ const cairo_rectangle_int_t *extents)
+{
+ if (surface->force_fallbacks &&
+ surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE)
+ {
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+ }
+
+ if (! _pattern_supported (pattern))
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ if (_pdf_operator_supported (op)) {
+ if (pattern->type == CAIRO_PATTERN_TYPE_SURFACE) {
+ cairo_surface_pattern_t *surface_pattern = (cairo_surface_pattern_t *) pattern;
+
+ if (surface_pattern->surface->type == CAIRO_SURFACE_TYPE_RECORDING) {
+ if (pattern->extend == CAIRO_EXTEND_PAD) {
+ cairo_box_t box;
+ cairo_rectangle_int_t rect;
+ cairo_rectangle_int_t rec_extents;
+
+ /* get the operation extents in pattern space */
+ _cairo_box_from_rectangle (&box, extents);
+ _cairo_matrix_transform_bounding_box_fixed (&pattern->matrix, &box, NULL);
+ _cairo_box_round_to_rectangle (&box, &rect);
+
+ /* Check if surface needs padding to fill extents */
+ if (_cairo_surface_get_extents (surface_pattern->surface, &rec_extents)) {
+ if (_cairo_fixed_integer_ceil(box.p1.x) < rec_extents.x ||
+ _cairo_fixed_integer_ceil(box.p1.y) < rec_extents.y ||
+ _cairo_fixed_integer_floor(box.p2.y) > rec_extents.x + rec_extents.width ||
+ _cairo_fixed_integer_floor(box.p2.y) > rec_extents.y + rec_extents.height)
+ {
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+ }
+ }
+ }
+ return CAIRO_INT_STATUS_ANALYZE_RECORDING_SURFACE_PATTERN;
+ }
+ }
+
+ return CAIRO_STATUS_SUCCESS;
+ }
+
+
+ /* The SOURCE operator is supported if the pattern is opaque or if
+ * there is nothing painted underneath. */
+ if (op == CAIRO_OPERATOR_SOURCE) {
+ if (pattern->type == CAIRO_PATTERN_TYPE_SURFACE) {
+ cairo_surface_pattern_t *surface_pattern = (cairo_surface_pattern_t *) pattern;
+
+ if (surface_pattern->surface->type == CAIRO_SURFACE_TYPE_RECORDING) {
+ if (_cairo_pattern_is_opaque (pattern, extents)) {
+ return CAIRO_INT_STATUS_ANALYZE_RECORDING_SURFACE_PATTERN;
+ } else {
+ /* FIXME: The analysis surface does not yet have
+ * the capability to analyze a non opaque recording
+ * surface and mark it supported if there is
+ * nothing underneath. For now recording surfaces of
+ * type CONTENT_COLOR_ALPHA painted with
+ * OPERATOR_SOURCE will result in a fallback
+ * image. */
+
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+ }
+ } else {
+ return _cairo_pdf_surface_analyze_surface_pattern_transparency (surface,
+ surface_pattern);
+ }
+ }
+
+ if (_cairo_pattern_is_opaque (pattern, extents))
+ return CAIRO_STATUS_SUCCESS;
+ else
+ return CAIRO_INT_STATUS_FLATTEN_TRANSPARENCY;
+ }
+
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+}
+
+static cairo_bool_t
+_cairo_pdf_surface_operation_supported (cairo_pdf_surface_t *surface,
+ cairo_operator_t op,
+ const cairo_pattern_t *pattern,
+ const cairo_rectangle_int_t *extents)
+{
+ return _cairo_pdf_surface_analyze_operation (surface, op, pattern, extents) != CAIRO_INT_STATUS_UNSUPPORTED;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_start_fallback (cairo_pdf_surface_t *surface)
+{
+ cairo_box_double_t bbox;
+ cairo_int_status_t status;
+
+ status = _cairo_pdf_surface_close_content_stream (surface);
+ if (unlikely (status))
+ return status;
+
+ status = _cairo_array_append (&surface->knockout_group, &surface->content);
+ if (unlikely (status))
+ return status;
+
+ _cairo_pdf_group_resources_clear (&surface->resources);
+ bbox.p1.x = 0;
+ bbox.p1.y = 0;
+ bbox.p2.x = surface->width;
+ bbox.p2.y = surface->height;
+ return _cairo_pdf_surface_open_content_stream (surface, &bbox, NULL, TRUE, TRUE);
+}
+
+/* If source is an opaque image and mask is an image and both images
+ * have the same bounding box we can emit them as a image/smask pair.
+ */
+static cairo_int_status_t
+_cairo_pdf_surface_emit_combined_smask (cairo_pdf_surface_t *surface,
+ cairo_operator_t op,
+ const cairo_pattern_t *source,
+ const cairo_pattern_t *mask,
+ const cairo_rectangle_int_t *extents)
+{
+ cairo_int_status_t status;
+ cairo_image_surface_t *image;
+ void *image_extra;
+ cairo_image_transparency_t transparency;
+ cairo_pdf_resource_t smask_res;
+ int src_width, src_height;
+ int mask_width, mask_height;
+ double src_x_offset, src_y_offset;
+ double mask_x_offset, mask_y_offset;
+ double src_x1, src_y1, src_x2, src_y2;
+ double mask_x1, mask_y1, mask_x2, mask_y2;
+ cairo_matrix_t p2u;
+ double src_radius, mask_radius, e;
+ cairo_rectangle_int_t extents2;
+ cairo_bool_t need_smask;
+
+ /* Check that source and mask are images */
+
+ if (!((source->type == CAIRO_PATTERN_TYPE_SURFACE || source->type == CAIRO_PATTERN_TYPE_RASTER_SOURCE) &&
+ (mask->type == CAIRO_PATTERN_TYPE_SURFACE || mask->type == CAIRO_PATTERN_TYPE_RASTER_SOURCE)))
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ if (source->type == CAIRO_PATTERN_TYPE_SURFACE &&
+ ((cairo_surface_pattern_t *) source)->surface->type == CAIRO_SURFACE_TYPE_RECORDING)
+ {
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+ }
+
+ if (mask->type == CAIRO_PATTERN_TYPE_SURFACE &&
+ ((cairo_surface_pattern_t *) mask)->surface->type == CAIRO_SURFACE_TYPE_RECORDING)
+ {
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+ }
+
+ if (source->extend != CAIRO_EXTEND_NONE || mask->extend != CAIRO_EXTEND_NONE)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ /* Check that source is opaque and get image sizes */
+
+ status = _cairo_pdf_surface_acquire_source_image_from_pattern (surface, source,
+ &image, &image_extra);
+ if (unlikely (status))
+ return status;
+
+ if (image->base.status)
+ return image->base.status;
+
+ src_width = image->width;
+ src_height = image->height;
+ if (source->type == CAIRO_PATTERN_TYPE_RASTER_SOURCE) {
+ cairo_surface_get_device_offset (&image->base, &src_x_offset, &src_y_offset);
+ } else {
+ src_x_offset = 0;
+ src_y_offset = 0;
+ }
+
+ transparency = _cairo_image_analyze_transparency (image);
+ _cairo_pdf_surface_release_source_image_from_pattern (surface, source, image, image_extra);
+
+ if (transparency != CAIRO_IMAGE_IS_OPAQUE)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ status = _cairo_pdf_surface_acquire_source_image_from_pattern (surface, mask,
+ &image, &image_extra);
+ if (unlikely (status))
+ return status;
+
+ if (image->base.status)
+ return image->base.status;
+
+ mask_width = image->width;
+ mask_height = image->height;
+ if (mask->type == CAIRO_PATTERN_TYPE_RASTER_SOURCE) {
+ cairo_surface_get_device_offset (&image->base, &mask_x_offset, &mask_y_offset);
+ } else {
+ mask_x_offset = 0;
+ mask_y_offset = 0;
+ }
+
+ transparency = _cairo_image_analyze_transparency (image);
+ need_smask = transparency != CAIRO_IMAGE_IS_OPAQUE;
+
+ _cairo_pdf_surface_release_source_image_from_pattern (surface, mask, image, image_extra);
+
+ /* Check that both images have the same extents with a tolerance
+ * of half the smallest source pixel. */
+
+ p2u = source->matrix;
+ status = cairo_matrix_invert (&p2u);
+ /* cairo_pattern_set_matrix ensures the matrix is invertible */
+ assert (status == CAIRO_INT_STATUS_SUCCESS);
+ src_x1 = 0;
+ src_y1 = 0;
+ src_x2 = src_width;
+ src_y2 = src_height;
+ cairo_matrix_transform_point (&p2u, &src_x1, &src_y1);
+ cairo_matrix_transform_point (&p2u, &src_x2, &src_y2);
+ src_radius = _cairo_matrix_transformed_circle_major_axis (&p2u, 0.5);
+
+ p2u = mask->matrix;
+ status = cairo_matrix_invert (&p2u);
+ /* cairo_pattern_set_matrix ensures the matrix is invertible */
+ assert (status == CAIRO_INT_STATUS_SUCCESS);
+ mask_x1 = 0;
+ mask_y1 = 0;
+ mask_x2 = mask_width;
+ mask_y2 = mask_height;
+ cairo_matrix_transform_point (&p2u, &mask_x1, &mask_y1);
+ cairo_matrix_transform_point (&p2u, &mask_x2, &mask_y2);
+ mask_radius = _cairo_matrix_transformed_circle_major_axis (&p2u, 0.5);
+
+ if (src_radius < mask_radius)
+ e = src_radius;
+ else
+ e = mask_radius;
+
+ if (fabs(src_x1 - mask_x1) > e ||
+ fabs(src_x2 - mask_x2) > e ||
+ fabs(src_y1 - mask_y1) > e ||
+ fabs(src_y2 - mask_y2) > e)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ /* Check both images have same device offset */
+ if (fabs(src_x_offset - mask_x_offset) > e ||
+ fabs(src_y_offset - mask_y_offset) > e)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ if (need_smask) {
+ status = _cairo_pdf_surface_add_source_surface (surface,
+ NULL,
+ mask,
+ op,
+ source->filter,
+ FALSE,
+ TRUE,
+ extents,
+ NULL,
+ &smask_res,
+ &mask_width,
+ &mask_height,
+ &mask_x_offset,
+ &mask_y_offset,
+ &extents2);
+ if (unlikely (status))
+ return status;
+ }
+
+ status = _cairo_pdf_operators_flush (&surface->pdf_operators);
+ if (unlikely (status))
+ return status;
+
+ _cairo_output_stream_printf (surface->output, "q\n");
+ status = _cairo_pdf_surface_paint_surface_pattern (surface, op, source, extents,
+ need_smask ? &smask_res : NULL,
+ FALSE);
+ if (unlikely (status))
+ return status;
+
+ _cairo_output_stream_printf (surface->output, "Q\n");
+
+ status = _cairo_output_stream_get_status (surface->output);
+
+
+ return status;
+}
+
+/* A PDF stencil mask is an A1 mask used with the current color */
+static cairo_int_status_t
+_cairo_pdf_surface_emit_stencil_mask (cairo_pdf_surface_t *surface,
+ cairo_operator_t op,
+ const cairo_pattern_t *source,
+ const cairo_pattern_t *mask,
+ const cairo_rectangle_int_t *extents)
+{
+ cairo_int_status_t status;
+ cairo_image_surface_t *image;
+ void *image_extra;
+ cairo_image_transparency_t transparency;
+ cairo_pdf_resource_t pattern_res = {0};
+
+ if (! (source->type == CAIRO_PATTERN_TYPE_SOLID &&
+ (mask->type == CAIRO_PATTERN_TYPE_SURFACE || mask->type == CAIRO_PATTERN_TYPE_RASTER_SOURCE)))
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ if (mask->type == CAIRO_PATTERN_TYPE_SURFACE &&
+ ((cairo_surface_pattern_t *) mask)->surface->type == CAIRO_SURFACE_TYPE_RECORDING)
+ {
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+ }
+
+ status = _cairo_pdf_surface_acquire_source_image_from_pattern (surface, mask,
+ &image, &image_extra);
+ if (unlikely (status))
+ return status;
+
+ if (image->base.status)
+ return image->base.status;
+
+ transparency = _cairo_image_analyze_transparency (image);
+ if (transparency != CAIRO_IMAGE_IS_OPAQUE &&
+ transparency != CAIRO_IMAGE_HAS_BILEVEL_ALPHA)
+ {
+ status = CAIRO_INT_STATUS_UNSUPPORTED;
+ goto cleanup;
+ }
+
+ status = _cairo_pdf_surface_select_pattern (surface, source,
+ pattern_res, FALSE);
+ if (unlikely (status))
+ return status;
+
+ status = _cairo_pdf_operators_flush (&surface->pdf_operators);
+ if (unlikely (status))
+ return status;
+
+ _cairo_output_stream_printf (surface->output, "q\n");
+ status = _cairo_pdf_surface_paint_surface_pattern (surface, op, mask, extents, NULL, TRUE);
+ if (unlikely (status))
+ return status;
+
+ _cairo_output_stream_printf (surface->output, "Q\n");
+
+ status = _cairo_output_stream_get_status (surface->output);
+
+cleanup:
+ _cairo_pdf_surface_release_source_image_from_pattern (surface, mask, image, image_extra);
+
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_set_clip (cairo_pdf_surface_t *surface,
+ cairo_composite_rectangles_t *composite)
+{
+ cairo_clip_t *clip = composite->clip;
+
+ if (_cairo_composite_rectangles_can_reduce_clip (composite, clip))
+ clip = NULL;
+
+ if (clip == NULL) {
+ if (_cairo_composite_rectangles_can_reduce_clip (composite,
+ surface->clipper.clip))
+ return CAIRO_STATUS_SUCCESS;
+ }
+
+ return _cairo_surface_clipper_set_clip (&surface->clipper, clip);
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_paint (void *abstract_surface,
+ cairo_operator_t op,
+ const cairo_pattern_t *source,
+ const cairo_clip_t *clip)
+{
+ cairo_pdf_surface_t *surface = abstract_surface;
+ cairo_pdf_smask_group_t *group;
+ cairo_pdf_resource_t pattern_res, gstate_res;
+ cairo_composite_rectangles_t extents;
+ cairo_int_status_t status;
+
+ status = _cairo_composite_rectangles_init_for_paint (&extents,
+ &surface->base,
+ op, source, clip);
+ if (unlikely (status))
+ return status;
+
+ if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE) {
+ status = _cairo_pdf_surface_analyze_operation (surface, op, source, &extents.bounded);
+ goto cleanup;
+ } else if (surface->paginated_mode == CAIRO_PAGINATED_MODE_FALLBACK) {
+ status = _cairo_pdf_surface_start_fallback (surface);
+ if (unlikely (status))
+ goto cleanup;
+ }
+
+ assert (_cairo_pdf_surface_operation_supported (surface, op, source, &extents.bounded));
+
+ status = _cairo_pdf_surface_set_clip (surface, &extents);
+ if (unlikely (status))
+ goto cleanup;
+
+ status = _cairo_pdf_surface_select_operator (surface, op);
+ if (unlikely (status))
+ goto cleanup;
+
+ status = _cairo_pdf_operators_flush (&surface->pdf_operators);
+ if (unlikely (status))
+ goto cleanup;
+
+ if (_can_paint_pattern (source)) {
+ _cairo_output_stream_printf (surface->output, "q\n");
+ status = _cairo_pdf_surface_paint_pattern (surface,
+ op,
+ source,
+ &extents.bounded,
+ FALSE);
+ if (unlikely (status))
+ goto cleanup;
+
+ _cairo_output_stream_printf (surface->output, "Q\n");
+ _cairo_composite_rectangles_fini (&extents);
+ return _cairo_output_stream_get_status (surface->output);
+ }
+
+ pattern_res.id = 0;
+ gstate_res.id = 0;
+ status = _cairo_pdf_surface_add_pdf_pattern (surface, source, op,
+ &extents.bounded,
+ &pattern_res, &gstate_res);
+ if (unlikely (status))
+ goto cleanup;
+
+ if (gstate_res.id != 0) {
+ group = _cairo_pdf_surface_create_smask_group (surface, &extents.bounded);
+ if (unlikely (group == NULL)) {
+ status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ goto cleanup;
+ }
+
+ group->operation = PDF_PAINT;
+ status = _cairo_pattern_create_copy (&group->source, source);
+ if (unlikely (status)) {
+ _cairo_pdf_smask_group_destroy (group);
+ goto cleanup;
+ }
+ group->source_res = pattern_res;
+ status = _cairo_pdf_surface_add_smask_group (surface, group);
+ if (unlikely (status)) {
+ _cairo_pdf_smask_group_destroy (group);
+ goto cleanup;
+ }
+
+ status = _cairo_pdf_surface_add_smask (surface, gstate_res);
+ if (unlikely (status))
+ goto cleanup;
+
+ status = _cairo_pdf_surface_add_xobject (surface, group->group_res);
+ if (unlikely (status))
+ goto cleanup;
+
+ _cairo_output_stream_printf (surface->output,
+ "q /s%d gs /x%d Do Q\n",
+ gstate_res.id,
+ group->group_res.id);
+ } else {
+ status = _cairo_pdf_surface_select_pattern (surface, source,
+ pattern_res, FALSE);
+ if (unlikely (status))
+ goto cleanup;
+
+ _cairo_output_stream_printf (surface->output,
+ "0 0 %f %f re f\n",
+ surface->width, surface->height);
+
+ status = _cairo_pdf_surface_unselect_pattern (surface);
+ if (unlikely (status))
+ goto cleanup;
+ }
+
+ _cairo_composite_rectangles_fini (&extents);
+ return _cairo_output_stream_get_status (surface->output);
+
+cleanup:
+ _cairo_composite_rectangles_fini (&extents);
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_mask (void *abstract_surface,
+ cairo_operator_t op,
+ const cairo_pattern_t *source,
+ const cairo_pattern_t *mask,
+ const cairo_clip_t *clip)
+{
+ cairo_pdf_surface_t *surface = abstract_surface;
+ cairo_pdf_smask_group_t *group;
+ cairo_composite_rectangles_t extents;
+ cairo_int_status_t status;
+ cairo_rectangle_int_t r;
+ cairo_box_t box;
+
+ status = _cairo_composite_rectangles_init_for_mask (&extents,
+ &surface->base,
+ op, source, mask, clip);
+ if (unlikely (status))
+ return status;
+
+ if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE) {
+ cairo_int_status_t source_status, mask_status;
+
+ status = _cairo_pdf_surface_analyze_operation (surface, op, source, &extents.bounded);
+ if (_cairo_int_status_is_error (status))
+ goto cleanup;
+ source_status = status;
+
+ if (mask->has_component_alpha) {
+ status = CAIRO_INT_STATUS_UNSUPPORTED;
+ } else {
+ status = _cairo_pdf_surface_analyze_operation (surface, op, mask, &extents.bounded);
+ if (_cairo_int_status_is_error (status))
+ goto cleanup;
+ }
+ mask_status = status;
+
+ _cairo_composite_rectangles_fini (&extents);
+ return _cairo_analysis_surface_merge_status (source_status,
+ mask_status);
+ } else if (surface->paginated_mode == CAIRO_PAGINATED_MODE_FALLBACK) {
+ status = _cairo_pdf_surface_start_fallback (surface);
+ if (unlikely (status))
+ goto cleanup;
+ }
+
+ assert (_cairo_pdf_surface_operation_supported (surface, op, source, &extents.bounded));
+ assert (_cairo_pdf_surface_operation_supported (surface, op, mask, &extents.bounded));
+
+ /* get the accurate extents */
+ status = _cairo_pattern_get_ink_extents (source, &r);
+ if (unlikely (status))
+ goto cleanup;
+
+ /* XXX slight impedance mismatch */
+ _cairo_box_from_rectangle (&box, &r);
+ status = _cairo_composite_rectangles_intersect_source_extents (&extents,
+ &box);
+ if (unlikely (status))
+ goto cleanup;
+
+ status = _cairo_pattern_get_ink_extents (mask, &r);
+ if (unlikely (status))
+ goto cleanup;
+
+ _cairo_box_from_rectangle (&box, &r);
+ status = _cairo_composite_rectangles_intersect_mask_extents (&extents,
+ &box);
+ if (unlikely (status))
+ goto cleanup;
+
+ status = _cairo_pdf_surface_set_clip (surface, &extents);
+ if (unlikely (status))
+ goto cleanup;
+
+ status = _cairo_pdf_surface_select_operator (surface, op);
+ if (unlikely (status))
+ goto cleanup;
+
+ /* Check if we can combine source and mask into a smask image */
+ status = _cairo_pdf_surface_emit_combined_smask (surface, op, source, mask, &extents.bounded);
+ if (status != CAIRO_INT_STATUS_UNSUPPORTED)
+ goto cleanup;
+
+ /* Check if we can use a stencil mask */
+ status = _cairo_pdf_surface_emit_stencil_mask (surface, op, source, mask, &extents.bounded);
+ if (status != CAIRO_INT_STATUS_UNSUPPORTED)
+ goto cleanup;
+
+ group = _cairo_pdf_surface_create_smask_group (surface, &extents.bounded);
+ if (unlikely (group == NULL)) {
+ status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ goto cleanup;
+ }
+
+ group->operation = PDF_MASK;
+ status = _cairo_pattern_create_copy (&group->source, source);
+ if (unlikely (status)) {
+ _cairo_pdf_smask_group_destroy (group);
+ goto cleanup;
+ }
+ status = _cairo_pattern_create_copy (&group->mask, mask);
+ if (unlikely (status)) {
+ _cairo_pdf_smask_group_destroy (group);
+ goto cleanup;
+ }
+ group->source_res = _cairo_pdf_surface_new_object (surface);
+ if (group->source_res.id == 0) {
+ _cairo_pdf_smask_group_destroy (group);
+ status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ goto cleanup;
+ }
+
+ status = _cairo_pdf_surface_add_smask_group (surface, group);
+ if (unlikely (status)) {
+ _cairo_pdf_smask_group_destroy (group);
+ goto cleanup;
+ }
+
+ status = _cairo_pdf_surface_add_smask (surface, group->group_res);
+ if (unlikely (status))
+ goto cleanup;
+
+ status = _cairo_pdf_surface_add_xobject (surface, group->source_res);
+ if (unlikely (status))
+ goto cleanup;
+
+ status = _cairo_pdf_operators_flush (&surface->pdf_operators);
+ if (unlikely (status))
+ goto cleanup;
+
+ _cairo_output_stream_printf (surface->output,
+ "q /s%d gs /x%d Do Q\n",
+ group->group_res.id,
+ group->source_res.id);
+
+ _cairo_composite_rectangles_fini (&extents);
+ return _cairo_output_stream_get_status (surface->output);
+
+cleanup:
+ _cairo_composite_rectangles_fini (&extents);
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_stroke (void *abstract_surface,
+ cairo_operator_t op,
+ const cairo_pattern_t *source,
+ const cairo_path_fixed_t *path,
+ const cairo_stroke_style_t *style,
+ const cairo_matrix_t *ctm,
+ const cairo_matrix_t *ctm_inverse,
+ double tolerance,
+ cairo_antialias_t antialias,
+ const cairo_clip_t *clip)
+{
+ cairo_pdf_surface_t *surface = abstract_surface;
+ cairo_pdf_smask_group_t *group;
+ cairo_pdf_resource_t pattern_res, gstate_res;
+ cairo_composite_rectangles_t extents;
+ cairo_int_status_t status;
+
+ status = _cairo_composite_rectangles_init_for_stroke (&extents,
+ &surface->base,
+ op, source,
+ path, style, ctm,
+ clip);
+ if (unlikely (status))
+ return status;
+
+ /* use the more accurate extents */
+ if (extents.is_bounded) {
+ cairo_rectangle_int_t mask;
+ cairo_box_t box;
+
+ status = _cairo_path_fixed_stroke_extents (path, style,
+ ctm, ctm_inverse,
+ tolerance,
+ &mask);
+ if (unlikely (status))
+ goto cleanup;
+
+ _cairo_box_from_rectangle (&box, &mask);
+ status = _cairo_composite_rectangles_intersect_mask_extents (&extents,
+ &box);
+ if (unlikely (status))
+ goto cleanup;
+ }
+
+ if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE) {
+ status = _cairo_pdf_surface_analyze_operation (surface, op, source, &extents.bounded);
+ goto cleanup;
+ }
+
+ assert (_cairo_pdf_surface_operation_supported (surface, op, source, &extents.bounded));
+
+ status = _cairo_pdf_surface_set_clip (surface, &extents);
+ if (unlikely (status))
+ goto cleanup;
+
+ pattern_res.id = 0;
+ gstate_res.id = 0;
+ status = _cairo_pdf_surface_add_pdf_pattern (surface, source, op,
+ &extents.bounded,
+ &pattern_res, &gstate_res);
+ if (unlikely (status))
+ goto cleanup;
+
+ status = _cairo_pdf_surface_select_operator (surface, op);
+ if (unlikely (status))
+ goto cleanup;
+
+ if (gstate_res.id != 0) {
+ group = _cairo_pdf_surface_create_smask_group (surface, &extents.bounded);
+ if (unlikely (group == NULL)) {
+ status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ goto cleanup;
+ }
+
+ group->operation = PDF_STROKE;
+ status = _cairo_pattern_create_copy (&group->source, source);
+ if (unlikely (status)) {
+ _cairo_pdf_smask_group_destroy (group);
+ goto cleanup;
+ }
+ group->source_res = pattern_res;
+ status = _cairo_path_fixed_init_copy (&group->path, path);
+ if (unlikely (status)) {
+ _cairo_pdf_smask_group_destroy (group);
+ goto cleanup;
+ }
+
+ group->style = *style;
+ group->ctm = *ctm;
+ group->ctm_inverse = *ctm_inverse;
+ status = _cairo_pdf_surface_add_smask_group (surface, group);
+ if (unlikely (status)) {
+ _cairo_pdf_smask_group_destroy (group);
+ goto cleanup;
+ }
+
+ status = _cairo_pdf_surface_add_smask (surface, gstate_res);
+ if (unlikely (status))
+ goto cleanup;
+
+ status = _cairo_pdf_surface_add_xobject (surface, group->group_res);
+ if (unlikely (status))
+ goto cleanup;
+
+ status = _cairo_pdf_operators_flush (&surface->pdf_operators);
+ if (unlikely (status))
+ goto cleanup;
+
+ _cairo_output_stream_printf (surface->output,
+ "q /s%d gs /x%d Do Q\n",
+ gstate_res.id,
+ group->group_res.id);
+ } else {
+ status = _cairo_pdf_surface_select_pattern (surface, source, pattern_res, TRUE);
+ if (unlikely (status))
+ goto cleanup;
+
+ status = _cairo_pdf_operators_stroke (&surface->pdf_operators,
+ path,
+ style,
+ ctm,
+ ctm_inverse);
+ if (unlikely (status))
+ goto cleanup;
+
+ status = _cairo_pdf_surface_unselect_pattern (surface);
+ if (unlikely (status))
+ goto cleanup;
+ }
+
+ _cairo_composite_rectangles_fini (&extents);
+ return _cairo_output_stream_get_status (surface->output);
+
+cleanup:
+ _cairo_composite_rectangles_fini (&extents);
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_fill (void *abstract_surface,
+ cairo_operator_t op,
+ const cairo_pattern_t *source,
+ const cairo_path_fixed_t*path,
+ cairo_fill_rule_t fill_rule,
+ double tolerance,
+ cairo_antialias_t antialias,
+ const cairo_clip_t *clip)
+{
+ cairo_pdf_surface_t *surface = abstract_surface;
+ cairo_int_status_t status;
+ cairo_pdf_smask_group_t *group;
+ cairo_pdf_resource_t pattern_res, gstate_res;
+ cairo_composite_rectangles_t extents;
+
+ status = _cairo_composite_rectangles_init_for_fill (&extents,
+ &surface->base,
+ op, source, path,
+ clip);
+ if (unlikely (status))
+ return status;
+
+ /* use the more accurate extents */
+ if (extents.is_bounded) {
+ cairo_rectangle_int_t mask;
+ cairo_box_t box;
+
+ _cairo_path_fixed_fill_extents (path,
+ fill_rule,
+ tolerance,
+ &mask);
+
+ _cairo_box_from_rectangle (&box, &mask);
+ status = _cairo_composite_rectangles_intersect_mask_extents (&extents,
+ &box);
+ if (unlikely (status))
+ goto cleanup;
+ }
+
+ if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE) {
+ status = _cairo_pdf_surface_analyze_operation (surface, op, source, &extents.bounded);
+ goto cleanup;
+ } else if (surface->paginated_mode == CAIRO_PAGINATED_MODE_FALLBACK) {
+ status = _cairo_pdf_surface_start_fallback (surface);
+ if (unlikely (status))
+ goto cleanup;
+ }
+
+ assert (_cairo_pdf_surface_operation_supported (surface, op, source, &extents.bounded));
+
+ status = _cairo_pdf_surface_set_clip (surface, &extents);
+ if (unlikely (status))
+ goto cleanup;
+
+ status = _cairo_pdf_surface_select_operator (surface, op);
+ if (unlikely (status))
+ goto cleanup;
+
+ if (_can_paint_pattern (source)) {
+ status = _cairo_pdf_operators_flush (&surface->pdf_operators);
+ if (unlikely (status))
+ goto cleanup;
+
+ _cairo_output_stream_printf (surface->output, "q\n");
+ status = _cairo_pdf_operators_clip (&surface->pdf_operators,
+ path,
+ fill_rule);
+ if (unlikely (status))
+ goto cleanup;
+
+ status = _cairo_pdf_surface_paint_pattern (surface,
+ op,
+ source,
+ &extents.bounded,
+ FALSE);
+ if (unlikely (status))
+ goto cleanup;
+
+ _cairo_output_stream_printf (surface->output, "Q\n");
+ status = _cairo_output_stream_get_status (surface->output);
+ goto cleanup;
+ }
+
+ pattern_res.id = 0;
+ gstate_res.id = 0;
+ status = _cairo_pdf_surface_add_pdf_pattern (surface, source, op,
+ &extents.bounded,
+ &pattern_res, &gstate_res);
+ if (unlikely (status))
+ goto cleanup;
+
+ if (gstate_res.id != 0) {
+ group = _cairo_pdf_surface_create_smask_group (surface, &extents.bounded);
+ if (unlikely (group == NULL)) {
+ status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ goto cleanup;
+ }
+
+ group->operation = PDF_FILL;
+ status = _cairo_pattern_create_copy (&group->source, source);
+ if (unlikely (status)) {
+ _cairo_pdf_smask_group_destroy (group);
+ goto cleanup;
+ }
+ group->source_res = pattern_res;
+ status = _cairo_path_fixed_init_copy (&group->path, path);
+ if (unlikely (status)) {
+ _cairo_pdf_smask_group_destroy (group);
+ goto cleanup;
+ }
+
+ group->fill_rule = fill_rule;
+ status = _cairo_pdf_surface_add_smask_group (surface, group);
+ if (unlikely (status)) {
+ _cairo_pdf_smask_group_destroy (group);
+ goto cleanup;
+ }
+
+ status = _cairo_pdf_surface_add_smask (surface, gstate_res);
+ if (unlikely (status))
+ goto cleanup;
+
+ status = _cairo_pdf_surface_add_xobject (surface, group->group_res);
+ if (unlikely (status))
+ goto cleanup;
+
+ status = _cairo_pdf_operators_flush (&surface->pdf_operators);
+ if (unlikely (status))
+ goto cleanup;
+
+ _cairo_output_stream_printf (surface->output,
+ "q /s%d gs /x%d Do Q\n",
+ gstate_res.id,
+ group->group_res.id);
+ } else {
+ status = _cairo_pdf_surface_select_pattern (surface, source, pattern_res, FALSE);
+ if (unlikely (status))
+ goto cleanup;
+
+ status = _cairo_pdf_operators_fill (&surface->pdf_operators,
+ path,
+ fill_rule);
+ if (unlikely (status))
+ goto cleanup;
+
+ status = _cairo_pdf_surface_unselect_pattern (surface);
+ if (unlikely (status))
+ goto cleanup;
+ }
+
+ _cairo_composite_rectangles_fini (&extents);
+ return _cairo_output_stream_get_status (surface->output);
+
+cleanup:
+ _cairo_composite_rectangles_fini (&extents);
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_fill_stroke (void *abstract_surface,
+ cairo_operator_t fill_op,
+ const cairo_pattern_t *fill_source,
+ cairo_fill_rule_t fill_rule,
+ double fill_tolerance,
+ cairo_antialias_t fill_antialias,
+ const cairo_path_fixed_t*path,
+ cairo_operator_t stroke_op,
+ const cairo_pattern_t *stroke_source,
+ const cairo_stroke_style_t *stroke_style,
+ const cairo_matrix_t *stroke_ctm,
+ const cairo_matrix_t *stroke_ctm_inverse,
+ double stroke_tolerance,
+ cairo_antialias_t stroke_antialias,
+ const cairo_clip_t *clip)
+{
+ cairo_pdf_surface_t *surface = abstract_surface;
+ cairo_int_status_t status;
+ cairo_pdf_resource_t fill_pattern_res, stroke_pattern_res, gstate_res;
+ cairo_composite_rectangles_t extents;
+
+ /* During analysis we return unsupported and let the _fill and
+ * _stroke functions that are on the fallback path do the analysis
+ * for us. During render we may still encounter unsupported
+ * combinations of fill/stroke patterns. However we can return
+ * unsupported anytime to let the _fill and _stroke functions take
+ * over.
+ */
+ if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ /* PDF rendering of fill-stroke is not the same as cairo when
+ * either the fill or stroke is not opaque.
+ */
+ if ( !_cairo_pattern_is_opaque (fill_source, NULL) ||
+ !_cairo_pattern_is_opaque (stroke_source, NULL))
+ {
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+ }
+
+ if (fill_op != stroke_op)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ /* Compute the operation extents using the stroke which will naturally
+ * be larger than the fill extents.
+ */
+ status = _cairo_composite_rectangles_init_for_stroke (&extents,
+ &surface->base,
+ stroke_op, stroke_source,
+ path, stroke_style, stroke_ctm,
+ clip);
+ if (unlikely (status))
+ return status;
+
+ /* use the more accurate extents */
+ if (extents.is_bounded) {
+ cairo_rectangle_int_t mask;
+ cairo_box_t box;
+
+ status = _cairo_path_fixed_stroke_extents (path, stroke_style,
+ stroke_ctm, stroke_ctm_inverse,
+ stroke_tolerance,
+ &mask);
+ if (unlikely (status))
+ goto cleanup;
+
+ _cairo_box_from_rectangle (&box, &mask);
+ status = _cairo_composite_rectangles_intersect_mask_extents (&extents,
+ &box);
+ if (unlikely (status))
+ goto cleanup;
+ }
+
+ status = _cairo_pdf_surface_set_clip (surface, &extents);
+ if (unlikely (status))
+ goto cleanup;
+
+ status = _cairo_pdf_surface_select_operator (surface, fill_op);
+ if (unlikely (status))
+ goto cleanup;
+
+ /* use the more accurate extents */
+ if (extents.is_bounded) {
+ cairo_rectangle_int_t mask;
+ cairo_box_t box;
+
+ _cairo_path_fixed_fill_extents (path,
+ fill_rule,
+ fill_tolerance,
+ &mask);
+
+ _cairo_box_from_rectangle (&box, &mask);
+ status = _cairo_composite_rectangles_intersect_mask_extents (&extents,
+ &box);
+ if (unlikely (status))
+ goto cleanup;
+ }
+
+ fill_pattern_res.id = 0;
+ gstate_res.id = 0;
+ status = _cairo_pdf_surface_add_pdf_pattern (surface, fill_source,
+ fill_op,
+ &extents.bounded,
+ &fill_pattern_res,
+ &gstate_res);
+ if (unlikely (status))
+ goto cleanup;
+
+ assert (gstate_res.id == 0);
+
+ stroke_pattern_res.id = 0;
+ gstate_res.id = 0;
+ status = _cairo_pdf_surface_add_pdf_pattern (surface,
+ stroke_source,
+ stroke_op,
+ &extents.bounded,
+ &stroke_pattern_res,
+ &gstate_res);
+ if (unlikely (status))
+ goto cleanup;
+
+ assert (gstate_res.id == 0);
+
+ /* As PDF has separate graphics state for fill and stroke we can
+ * select both at the same time */
+ status = _cairo_pdf_surface_select_pattern (surface, fill_source,
+ fill_pattern_res, FALSE);
+ if (unlikely (status))
+ goto cleanup;
+
+ status = _cairo_pdf_surface_select_pattern (surface, stroke_source,
+ stroke_pattern_res, TRUE);
+ if (unlikely (status))
+ goto cleanup;
+
+ status = _cairo_pdf_operators_fill_stroke (&surface->pdf_operators,
+ path,
+ fill_rule,
+ stroke_style,
+ stroke_ctm,
+ stroke_ctm_inverse);
+ if (unlikely (status))
+ goto cleanup;
+
+ status = _cairo_pdf_surface_unselect_pattern (surface);
+ if (unlikely (status))
+ goto cleanup;
+
+ _cairo_composite_rectangles_fini (&extents);
+ return _cairo_output_stream_get_status (surface->output);
+
+cleanup:
+ _cairo_composite_rectangles_fini (&extents);
+ return status;
+}
+
+static cairo_bool_t
+_cairo_pdf_surface_has_show_text_glyphs (void *abstract_surface)
+{
+ return TRUE;
+}
+
+static cairo_int_status_t
+_cairo_pdf_surface_show_text_glyphs (void *abstract_surface,
+ cairo_operator_t op,
+ const cairo_pattern_t *source,
+ const char *utf8,
+ int utf8_len,
+ cairo_glyph_t *glyphs,
+ int num_glyphs,
+ const cairo_text_cluster_t *clusters,
+ int num_clusters,
+ cairo_text_cluster_flags_t cluster_flags,
+ cairo_scaled_font_t *scaled_font,
+ const cairo_clip_t *clip)
+{
+ cairo_pdf_surface_t *surface = abstract_surface;
+ cairo_pdf_smask_group_t *group;
+ cairo_pdf_resource_t pattern_res, gstate_res;
+ cairo_composite_rectangles_t extents;
+ cairo_bool_t overlap;
+ cairo_int_status_t status;
+
+ status = _cairo_composite_rectangles_init_for_glyphs (&extents,
+ &surface->base,
+ op, source,
+ scaled_font,
+ glyphs, num_glyphs,
+ clip,
+ &overlap);
+ if (unlikely (status))
+ return status;
+
+ if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE) {
+ status = _cairo_pdf_surface_analyze_operation (surface, op, source, &extents.bounded);
+ goto cleanup;
+ }
+
+ assert (_cairo_pdf_surface_operation_supported (surface, op, source, &extents.bounded));
+
+ status = _cairo_pdf_surface_set_clip (surface, &extents);
+ if (unlikely (status))
+ goto cleanup;
+
+ pattern_res.id = 0;
+ gstate_res.id = 0;
+ status = _cairo_pdf_surface_add_pdf_pattern (surface, source, op,
+ &extents.bounded,
+ &pattern_res, &gstate_res);
+ if (unlikely (status))
+ goto cleanup;
+
+ status = _cairo_pdf_surface_select_operator (surface, op);
+ if (unlikely (status))
+ goto cleanup;
+
+ if (gstate_res.id != 0) {
+ group = _cairo_pdf_surface_create_smask_group (surface, &extents.bounded);
+ if (unlikely (group == NULL)) {
+ status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ goto cleanup;
+ }
+
+ group->operation = PDF_SHOW_GLYPHS;
+ status = _cairo_pattern_create_copy (&group->source, source);
+ if (unlikely (status)) {
+ _cairo_pdf_smask_group_destroy (group);
+ goto cleanup;
+ }
+ group->source_res = pattern_res;
+
+ if (utf8_len) {
+ group->utf8 = malloc (utf8_len);
+ if (unlikely (group->utf8 == NULL)) {
+ _cairo_pdf_smask_group_destroy (group);
+ status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ goto cleanup;
+ }
+ memcpy (group->utf8, utf8, utf8_len);
+ }
+ group->utf8_len = utf8_len;
+
+ if (num_glyphs) {
+ group->glyphs = _cairo_malloc_ab (num_glyphs, sizeof (cairo_glyph_t));
+ if (unlikely (group->glyphs == NULL)) {
+ _cairo_pdf_smask_group_destroy (group);
+ status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ goto cleanup;
+ }
+ memcpy (group->glyphs, glyphs, sizeof (cairo_glyph_t) * num_glyphs);
+ }
+ group->num_glyphs = num_glyphs;
+
+ if (num_clusters) {
+ group->clusters = _cairo_malloc_ab (num_clusters, sizeof (cairo_text_cluster_t));
+ if (unlikely (group->clusters == NULL)) {
+ _cairo_pdf_smask_group_destroy (group);
+ status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ goto cleanup;
+ }
+ memcpy (group->clusters, clusters, sizeof (cairo_text_cluster_t) * num_clusters);
+ }
+ group->num_clusters = num_clusters;
+
+ group->scaled_font = cairo_scaled_font_reference (scaled_font);
+ status = _cairo_pdf_surface_add_smask_group (surface, group);
+ if (unlikely (status)) {
+ _cairo_pdf_smask_group_destroy (group);
+ goto cleanup;
+ }
+
+ status = _cairo_pdf_surface_add_smask (surface, gstate_res);
+ if (unlikely (status))
+ goto cleanup;
+
+ status = _cairo_pdf_surface_add_xobject (surface, group->group_res);
+ if (unlikely (status))
+ goto cleanup;
+
+ status = _cairo_pdf_operators_flush (&surface->pdf_operators);
+ if (unlikely (status))
+ goto cleanup;
+
+ _cairo_output_stream_printf (surface->output,
+ "q /s%d gs /x%d Do Q\n",
+ gstate_res.id,
+ group->group_res.id);
+ } else {
+ status = _cairo_pdf_surface_select_pattern (surface, source, pattern_res, FALSE);
+ if (unlikely (status))
+ goto cleanup;
+
+ /* Each call to show_glyphs() with a transclucent pattern must
+ * be in a separate text object otherwise overlapping text
+ * from separate calls to show_glyphs will not composite with
+ * each other. */
+ if (! _cairo_pattern_is_opaque (source, &extents.bounded)) {
+ status = _cairo_pdf_operators_flush (&surface->pdf_operators);
+ if (unlikely (status))
+ goto cleanup;
+ }
+
+ status = _cairo_pdf_operators_show_text_glyphs (&surface->pdf_operators,
+ utf8, utf8_len,
+ glyphs, num_glyphs,
+ clusters, num_clusters,
+ cluster_flags,
+ scaled_font);
+ if (unlikely (status))
+ goto cleanup;
+
+ status = _cairo_pdf_surface_unselect_pattern (surface);
+ if (unlikely (status))
+ goto cleanup;
+ }
+
+ _cairo_composite_rectangles_fini (&extents);
+ return _cairo_output_stream_get_status (surface->output);
+
+cleanup:
+ _cairo_composite_rectangles_fini (&extents);
+ return status;
+}
+
+static const char **
+_cairo_pdf_surface_get_supported_mime_types (void *abstract_surface)
+{
+ return _cairo_pdf_supported_mime_types;
+}
+
+static void
+_cairo_pdf_surface_set_paginated_mode (void *abstract_surface,
+ cairo_paginated_mode_t paginated_mode)
+{
+ cairo_pdf_surface_t *surface = abstract_surface;
+
+ surface->paginated_mode = paginated_mode;
+}
+
+static const cairo_surface_backend_t cairo_pdf_surface_backend = {
+ CAIRO_SURFACE_TYPE_PDF,
+ _cairo_pdf_surface_finish,
+
+ _cairo_default_context_create,
+
+ NULL, /* create similar: handled by wrapper */
+ NULL, /* create similar image */
+ NULL, /* map to image */
+ NULL, /* unmap image */
+
+ _cairo_surface_default_source,
+ NULL, /* acquire_source_image */
+ NULL, /* release_source_image */
+ NULL, /* snapshot */
+
+ NULL, /* _cairo_pdf_surface_copy_page */
+ _cairo_pdf_surface_show_page,
+
+ _cairo_pdf_surface_get_extents,
+ _cairo_pdf_surface_get_font_options,
+
+ NULL, /* flush */
+ NULL, /* mark_dirty_rectangle */
+
+ /* Here are the drawing functions */
+ _cairo_pdf_surface_paint,
+ _cairo_pdf_surface_mask,
+ _cairo_pdf_surface_stroke,
+ _cairo_pdf_surface_fill,
+ _cairo_pdf_surface_fill_stroke,
+ NULL, /* show_glyphs */
+ _cairo_pdf_surface_has_show_text_glyphs,
+ _cairo_pdf_surface_show_text_glyphs,
+ _cairo_pdf_surface_get_supported_mime_types,
+};
+
+static const cairo_paginated_surface_backend_t
+cairo_pdf_surface_paginated_backend = {
+ _cairo_pdf_surface_start_page,
+ _cairo_pdf_surface_set_paginated_mode,
+ NULL, /* set_bounding_box */
+ _cairo_pdf_surface_has_fallback_images,
+ _cairo_pdf_surface_supports_fine_grained_fallbacks,
+};