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+/* cairo - a vector graphics library with display and print output
+ *
+ * Copyright © 2005 Red Hat, Inc.
+ *
+ * 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 Red Hat, Inc.
+ *
+ * Contributor(s):
+ * Carl D. Worth <cworth@redhat.com>
+ */
+
+#ifndef CAIRO_PATTERN_PRIVATE_H
+#define CAIRO_PATTERN_PRIVATE_H
+
+#include "cairo-error-private.h"
+#include "cairo-types-private.h"
+#include "cairo-list-private.h"
+#include "cairo-surface-private.h"
+
+#include <stdio.h> /* FILE* */
+
+CAIRO_BEGIN_DECLS
+
+typedef struct _cairo_pattern_observer cairo_pattern_observer_t;
+
+enum {
+ CAIRO_PATTERN_NOTIFY_MATRIX = 0x1,
+ CAIRO_PATTERN_NOTIFY_FILTER = 0x2,
+ CAIRO_PATTERN_NOTIFY_EXTEND = 0x4,
+ CAIRO_PATTERN_NOTIFY_OPACITY = 0x9,
+};
+
+struct _cairo_pattern_observer {
+ void (*notify) (cairo_pattern_observer_t *,
+ cairo_pattern_t *pattern,
+ unsigned int flags);
+ cairo_list_t link;
+};
+
+struct _cairo_pattern {
+ cairo_reference_count_t ref_count;
+ cairo_status_t status;
+ cairo_user_data_array_t user_data;
+ cairo_list_t observers;
+
+ cairo_pattern_type_t type;
+
+ cairo_filter_t filter;
+ cairo_extend_t extend;
+ cairo_bool_t has_component_alpha;
+
+ cairo_matrix_t matrix;
+ double opacity;
+};
+
+struct _cairo_solid_pattern {
+ cairo_pattern_t base;
+ cairo_color_t color;
+};
+
+typedef struct _cairo_surface_pattern {
+ cairo_pattern_t base;
+
+ cairo_surface_t *surface;
+} cairo_surface_pattern_t;
+
+typedef struct _cairo_gradient_stop {
+ double offset;
+ cairo_color_stop_t color;
+} cairo_gradient_stop_t;
+
+typedef struct _cairo_gradient_pattern {
+ cairo_pattern_t base;
+
+ unsigned int n_stops;
+ unsigned int stops_size;
+ cairo_gradient_stop_t *stops;
+ cairo_gradient_stop_t stops_embedded[2];
+} cairo_gradient_pattern_t;
+
+typedef struct _cairo_linear_pattern {
+ cairo_gradient_pattern_t base;
+
+ cairo_point_double_t pd1;
+ cairo_point_double_t pd2;
+} cairo_linear_pattern_t;
+
+typedef struct _cairo_radial_pattern {
+ cairo_gradient_pattern_t base;
+
+ cairo_circle_double_t cd1;
+ cairo_circle_double_t cd2;
+} cairo_radial_pattern_t;
+
+typedef union {
+ cairo_gradient_pattern_t base;
+
+ cairo_linear_pattern_t linear;
+ cairo_radial_pattern_t radial;
+} cairo_gradient_pattern_union_t;
+
+/*
+ * A mesh patch is a tensor-product patch (bicubic Bezier surface
+ * patch). It has 16 control points. Each set of 4 points along the
+ * sides of the 4x4 grid of control points is a Bezier curve that
+ * defines one side of the patch. A color is assigned to each
+ * corner. The inner 4 points provide additional control over the
+ * shape and the color mapping.
+ *
+ * Cairo uses the same convention as the PDF Reference for numbering
+ * the points and side of the patch.
+ *
+ *
+ * Side 1
+ *
+ * p[0][3] p[1][3] p[2][3] p[3][3]
+ * Side 0 p[0][2] p[1][2] p[2][2] p[3][2] Side 2
+ * p[0][1] p[1][1] p[2][1] p[3][1]
+ * p[0][0] p[1][0] p[2][0] p[3][0]
+ *
+ * Side 3
+ *
+ *
+ * Point Color
+ * -------------------------
+ * points[0][0] colors[0]
+ * points[0][3] colors[1]
+ * points[3][3] colors[2]
+ * points[3][0] colors[3]
+ */
+
+typedef struct _cairo_mesh_patch {
+ cairo_point_double_t points[4][4];
+ cairo_color_t colors[4];
+} cairo_mesh_patch_t;
+
+typedef struct _cairo_mesh_pattern {
+ cairo_pattern_t base;
+
+ cairo_array_t patches;
+ cairo_mesh_patch_t *current_patch;
+ int current_side;
+ cairo_bool_t has_control_point[4];
+ cairo_bool_t has_color[4];
+} cairo_mesh_pattern_t;
+
+typedef struct _cairo_raster_source_pattern {
+ cairo_pattern_t base;
+
+ cairo_content_t content;
+ cairo_rectangle_int_t extents;
+
+ cairo_raster_source_acquire_func_t acquire;
+ cairo_raster_source_release_func_t release;
+ cairo_raster_source_snapshot_func_t snapshot;
+ cairo_raster_source_copy_func_t copy;
+ cairo_raster_source_finish_func_t finish;
+
+ /* an explicit pre-allocated member in preference to the general user-data */
+ void *user_data;
+} cairo_raster_source_pattern_t;
+
+typedef union {
+ cairo_pattern_t base;
+
+ cairo_solid_pattern_t solid;
+ cairo_surface_pattern_t surface;
+ cairo_gradient_pattern_union_t gradient;
+ cairo_mesh_pattern_t mesh;
+ cairo_raster_source_pattern_t raster_source;
+} cairo_pattern_union_t;
+
+/* cairo-pattern.c */
+
+cairo_private cairo_pattern_t *
+_cairo_pattern_create_in_error (cairo_status_t status);
+
+cairo_private cairo_status_t
+_cairo_pattern_create_copy (cairo_pattern_t **pattern,
+ const cairo_pattern_t *other);
+
+cairo_private void
+_cairo_pattern_init (cairo_pattern_t *pattern,
+ cairo_pattern_type_t type);
+
+cairo_private cairo_status_t
+_cairo_pattern_init_copy (cairo_pattern_t *pattern,
+ const cairo_pattern_t *other);
+
+cairo_private void
+_cairo_pattern_init_static_copy (cairo_pattern_t *pattern,
+ const cairo_pattern_t *other);
+
+cairo_private cairo_status_t
+_cairo_pattern_init_snapshot (cairo_pattern_t *pattern,
+ const cairo_pattern_t *other);
+
+cairo_private void
+_cairo_pattern_init_solid (cairo_solid_pattern_t *pattern,
+ const cairo_color_t *color);
+
+cairo_private void
+_cairo_pattern_init_for_surface (cairo_surface_pattern_t *pattern,
+ cairo_surface_t *surface);
+
+cairo_private void
+_cairo_pattern_fini (cairo_pattern_t *pattern);
+
+cairo_private cairo_pattern_t *
+_cairo_pattern_create_solid (const cairo_color_t *color);
+
+cairo_private void
+_cairo_pattern_transform (cairo_pattern_t *pattern,
+ const cairo_matrix_t *ctm_inverse);
+
+cairo_private void
+_cairo_pattern_pretransform (cairo_pattern_t *pattern,
+ const cairo_matrix_t *ctm);
+
+cairo_private cairo_bool_t
+_cairo_pattern_is_opaque_solid (const cairo_pattern_t *pattern);
+
+cairo_private cairo_bool_t
+_cairo_pattern_is_opaque (const cairo_pattern_t *pattern,
+ const cairo_rectangle_int_t *extents);
+
+cairo_private cairo_bool_t
+_cairo_pattern_is_clear (const cairo_pattern_t *pattern);
+
+cairo_private cairo_bool_t
+_cairo_gradient_pattern_is_solid (const cairo_gradient_pattern_t *gradient,
+ const cairo_rectangle_int_t *extents,
+ cairo_color_t *color);
+
+cairo_private void
+_cairo_gradient_pattern_fit_to_range (const cairo_gradient_pattern_t *gradient,
+ double max_value,
+ cairo_matrix_t *out_matrix,
+ cairo_circle_double_t out_circle[2]);
+
+cairo_private cairo_bool_t
+_cairo_radial_pattern_focus_is_inside (const cairo_radial_pattern_t *radial);
+
+cairo_private void
+_cairo_gradient_pattern_box_to_parameter (const cairo_gradient_pattern_t *gradient,
+ double x0, double y0,
+ double x1, double y1,
+ double tolerance,
+ double out_range[2]);
+
+cairo_private void
+_cairo_gradient_pattern_interpolate (const cairo_gradient_pattern_t *gradient,
+ double t,
+ cairo_circle_double_t *out_circle);
+
+cairo_private void
+_cairo_pattern_alpha_range (const cairo_pattern_t *pattern,
+ double *out_min,
+ double *out_max);
+
+cairo_private cairo_bool_t
+_cairo_mesh_pattern_coord_box (const cairo_mesh_pattern_t *mesh,
+ double *out_xmin,
+ double *out_ymin,
+ double *out_xmax,
+ double *out_ymax);
+
+cairo_private void
+_cairo_pattern_sampled_area (const cairo_pattern_t *pattern,
+ const cairo_rectangle_int_t *extents,
+ cairo_rectangle_int_t *sample);
+
+cairo_private void
+_cairo_pattern_get_extents (const cairo_pattern_t *pattern,
+ cairo_rectangle_int_t *extents);
+
+cairo_private cairo_int_status_t
+_cairo_pattern_get_ink_extents (const cairo_pattern_t *pattern,
+ cairo_rectangle_int_t *extents);
+
+cairo_private unsigned long
+_cairo_pattern_hash (const cairo_pattern_t *pattern);
+
+cairo_private unsigned long
+_cairo_linear_pattern_hash (unsigned long hash,
+ const cairo_linear_pattern_t *linear);
+
+cairo_private unsigned long
+_cairo_radial_pattern_hash (unsigned long hash,
+ const cairo_radial_pattern_t *radial);
+
+cairo_private cairo_bool_t
+_cairo_linear_pattern_equal (const cairo_linear_pattern_t *a,
+ const cairo_linear_pattern_t *b);
+
+cairo_private unsigned long
+_cairo_pattern_size (const cairo_pattern_t *pattern);
+
+cairo_private cairo_bool_t
+_cairo_radial_pattern_equal (const cairo_radial_pattern_t *a,
+ const cairo_radial_pattern_t *b);
+
+cairo_private cairo_bool_t
+_cairo_pattern_equal (const cairo_pattern_t *a,
+ const cairo_pattern_t *b);
+
+cairo_private cairo_filter_t
+_cairo_pattern_analyze_filter (const cairo_pattern_t *pattern);
+
+/* cairo-mesh-pattern-rasterizer.c */
+
+cairo_private void
+_cairo_mesh_pattern_rasterize (const cairo_mesh_pattern_t *mesh,
+ void *data,
+ int width,
+ int height,
+ int stride,
+ double x_offset,
+ double y_offset);
+
+cairo_private cairo_surface_t *
+_cairo_raster_source_pattern_acquire (const cairo_pattern_t *abstract_pattern,
+ cairo_surface_t *target,
+ const cairo_rectangle_int_t *extents);
+
+cairo_private void
+_cairo_raster_source_pattern_release (const cairo_pattern_t *abstract_pattern,
+ cairo_surface_t *surface);
+
+cairo_private cairo_status_t
+_cairo_raster_source_pattern_snapshot (cairo_pattern_t *abstract_pattern);
+
+cairo_private cairo_status_t
+_cairo_raster_source_pattern_init_copy (cairo_pattern_t *pattern,
+ const cairo_pattern_t *other);
+
+cairo_private void
+_cairo_raster_source_pattern_finish (cairo_pattern_t *abstract_pattern);
+
+cairo_private void
+_cairo_debug_print_pattern (FILE *file, const cairo_pattern_t *pattern);
+
+CAIRO_END_DECLS
+
+#endif /* CAIRO_PATTERN_PRIVATE */