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-rw-r--r--src/cairo-xcb-surface.c1530
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diff --git a/src/cairo-xcb-surface.c b/src/cairo-xcb-surface.c
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+++ b/src/cairo-xcb-surface.c
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+/* cairo - a vector graphics library with display and print output
+ *
+ * Copyright © 2002 University of Southern California
+ * Copyright © 2009 Intel Corporation
+ *
+ * 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):
+ * Behdad Esfahbod <behdad@behdad.org>
+ * Carl D. Worth <cworth@cworth.org>
+ * Chris Wilson <chris@chris-wilson.co.uk>
+ * Karl Tomlinson <karlt+@karlt.net>, Mozilla Corporation
+ */
+
+#include "cairoint.h"
+
+#include "cairo-xcb.h"
+#include "cairo-xcb-private.h"
+
+#include "cairo-composite-rectangles-private.h"
+#include "cairo-default-context-private.h"
+#include "cairo-image-surface-inline.h"
+#include "cairo-list-inline.h"
+#include "cairo-surface-backend-private.h"
+#include "cairo-compositor-private.h"
+
+#if CAIRO_HAS_XLIB_XCB_FUNCTIONS
+slim_hidden_proto (cairo_xcb_surface_create);
+slim_hidden_proto (cairo_xcb_surface_create_for_bitmap);
+slim_hidden_proto (cairo_xcb_surface_create_with_xrender_format);
+#endif
+
+/**
+ * SECTION:cairo-xcb
+ * @Title: XCB Surfaces
+ * @Short_Description: X Window System rendering using the XCB library
+ * @See_Also: #cairo_surface_t
+ *
+ * The XCB surface is used to render cairo graphics to X Window System
+ * windows and pixmaps using the XCB library.
+ *
+ * Note that the XCB surface automatically takes advantage of the X render
+ * extension if it is available.
+ **/
+
+/**
+ * CAIRO_HAS_XCB_SURFACE:
+ *
+ * Defined if the xcb surface backend is available.
+ * This macro can be used to conditionally compile backend-specific code.
+ *
+ * Since: 1.12
+ **/
+
+cairo_surface_t *
+_cairo_xcb_surface_create_similar (void *abstract_other,
+ cairo_content_t content,
+ int width,
+ int height)
+{
+ cairo_xcb_surface_t *other = abstract_other;
+ cairo_xcb_surface_t *surface;
+ cairo_xcb_connection_t *connection;
+ xcb_pixmap_t pixmap;
+ cairo_status_t status;
+
+ if (unlikely(width > XLIB_COORD_MAX ||
+ height > XLIB_COORD_MAX ||
+ width <= 0 ||
+ height <= 0))
+ return cairo_image_surface_create (_cairo_format_from_content (content),
+ width, height);
+
+ if ((other->connection->flags & CAIRO_XCB_HAS_RENDER) == 0)
+ return _cairo_xcb_surface_create_similar_image (other,
+ _cairo_format_from_content (content),
+ width, height);
+
+ connection = other->connection;
+ status = _cairo_xcb_connection_acquire (connection);
+ if (unlikely (status))
+ return _cairo_surface_create_in_error (status);
+
+ if (content == other->base.content) {
+ pixmap = _cairo_xcb_connection_create_pixmap (connection,
+ other->depth,
+ other->drawable,
+ width, height);
+
+ surface = (cairo_xcb_surface_t *)
+ _cairo_xcb_surface_create_internal (other->screen,
+ pixmap, TRUE,
+ other->pixman_format,
+ other->xrender_format,
+ width, height);
+ } else {
+ cairo_format_t format;
+ pixman_format_code_t pixman_format;
+
+ /* XXX find a compatible xrender format */
+ switch (content) {
+ case CAIRO_CONTENT_ALPHA:
+ pixman_format = PIXMAN_a8;
+ format = CAIRO_FORMAT_A8;
+ break;
+ case CAIRO_CONTENT_COLOR:
+ pixman_format = PIXMAN_x8r8g8b8;
+ format = CAIRO_FORMAT_RGB24;
+ break;
+ default:
+ ASSERT_NOT_REACHED;
+ case CAIRO_CONTENT_COLOR_ALPHA:
+ pixman_format = PIXMAN_a8r8g8b8;
+ format = CAIRO_FORMAT_ARGB32;
+ break;
+ }
+
+ pixmap = _cairo_xcb_connection_create_pixmap (connection,
+ PIXMAN_FORMAT_DEPTH (pixman_format),
+ other->drawable,
+ width, height);
+
+ surface = (cairo_xcb_surface_t *)
+ _cairo_xcb_surface_create_internal (other->screen,
+ pixmap, TRUE,
+ pixman_format,
+ connection->standard_formats[format],
+ width, height);
+ }
+
+ if (unlikely (surface->base.status))
+ _cairo_xcb_connection_free_pixmap (connection, pixmap);
+
+ _cairo_xcb_connection_release (connection);
+
+ return &surface->base;
+}
+
+cairo_surface_t *
+_cairo_xcb_surface_create_similar_image (void *abstract_other,
+ cairo_format_t format,
+ int width,
+ int height)
+{
+ cairo_xcb_surface_t *other = abstract_other;
+ cairo_xcb_connection_t *connection = other->connection;
+
+ cairo_xcb_shm_info_t *shm_info;
+ cairo_image_surface_t *image;
+ cairo_status_t status;
+ pixman_format_code_t pixman_format;
+
+ if (unlikely(width > XLIB_COORD_MAX ||
+ height > XLIB_COORD_MAX ||
+ width <= 0 ||
+ height <= 0))
+ return NULL;
+
+ pixman_format = _cairo_format_to_pixman_format_code (format);
+
+ status = _cairo_xcb_shm_image_create (connection, pixman_format,
+ width, height, &image,
+ &shm_info);
+ if (unlikely (status))
+ return _cairo_surface_create_in_error (status);
+
+ if (! image->base.is_clear) {
+ memset (image->data, 0, image->stride * image->height);
+ image->base.is_clear = TRUE;
+ }
+
+ return &image->base;
+}
+
+static cairo_status_t
+_cairo_xcb_surface_finish (void *abstract_surface)
+{
+ cairo_xcb_surface_t *surface = abstract_surface;
+ cairo_status_t status;
+
+ if (surface->fallback != NULL) {
+ cairo_surface_finish (&surface->fallback->base);
+ cairo_surface_destroy (&surface->fallback->base);
+ }
+ _cairo_boxes_fini (&surface->fallback_damage);
+
+ cairo_list_del (&surface->link);
+
+ status = _cairo_xcb_connection_acquire (surface->connection);
+ if (status == CAIRO_STATUS_SUCCESS) {
+ if (surface->picture != XCB_NONE) {
+ _cairo_xcb_connection_render_free_picture (surface->connection,
+ surface->picture);
+ }
+
+ if (surface->owns_pixmap)
+ _cairo_xcb_connection_free_pixmap (surface->connection, surface->drawable);
+ _cairo_xcb_connection_release (surface->connection);
+ }
+
+ _cairo_xcb_connection_destroy (surface->connection);
+
+ return status;
+}
+
+static void
+_destroy_image (pixman_image_t *image, void *data)
+{
+ free (data);
+}
+
+#if CAIRO_HAS_XCB_SHM_FUNCTIONS
+static cairo_surface_t *
+_cairo_xcb_surface_create_shm_image (cairo_xcb_connection_t *connection,
+ pixman_format_code_t pixman_format,
+ int width, int height,
+ cairo_bool_t might_reuse,
+ cairo_xcb_shm_info_t **shm_info_out)
+{
+ cairo_surface_t *image;
+ cairo_xcb_shm_info_t *shm_info;
+ cairo_int_status_t status;
+ size_t stride;
+
+ *shm_info_out = NULL;
+
+ stride = CAIRO_STRIDE_FOR_WIDTH_BPP (width,
+ PIXMAN_FORMAT_BPP (pixman_format));
+ status = _cairo_xcb_connection_allocate_shm_info (connection,
+ stride * height,
+ might_reuse,
+ &shm_info);
+ if (unlikely (status)) {
+ if (status == CAIRO_INT_STATUS_UNSUPPORTED)
+ return NULL;
+
+ return _cairo_surface_create_in_error (status);
+ }
+
+ image = _cairo_image_surface_create_with_pixman_format (shm_info->mem,
+ pixman_format,
+ width, height,
+ stride);
+ if (unlikely (image->status)) {
+ _cairo_xcb_shm_info_destroy (shm_info);
+ return image;
+ }
+
+ status = _cairo_user_data_array_set_data (&image->user_data,
+ (const cairo_user_data_key_t *) connection,
+ shm_info,
+ (cairo_destroy_func_t) _cairo_xcb_shm_info_destroy);
+ if (unlikely (status)) {
+ cairo_surface_destroy (image);
+ _cairo_xcb_shm_info_destroy (shm_info);
+ return _cairo_surface_create_in_error (status);
+ }
+
+ *shm_info_out = shm_info;
+ return image;
+}
+#endif
+
+static cairo_surface_t *
+_get_shm_image (cairo_xcb_surface_t *surface,
+ int x, int y,
+ int width, int height)
+{
+#if CAIRO_HAS_XCB_SHM_FUNCTIONS
+ cairo_xcb_shm_info_t *shm_info;
+ cairo_surface_t *image;
+ cairo_status_t status;
+
+ if ((surface->connection->flags & CAIRO_XCB_HAS_SHM) == 0)
+ return NULL;
+
+ image = _cairo_xcb_surface_create_shm_image (surface->connection,
+ surface->pixman_format,
+ width, height,
+ TRUE,
+ &shm_info);
+ if (unlikely (image == NULL || image->status))
+ goto done;
+
+ status = _cairo_xcb_connection_shm_get_image (surface->connection,
+ surface->drawable,
+ x, y,
+ width, height,
+ shm_info->shm,
+ shm_info->offset);
+ if (unlikely (status)) {
+ cairo_surface_destroy (image);
+ image = _cairo_surface_create_in_error (status);
+ }
+
+done:
+ return image;
+#else
+ return NULL;
+#endif
+}
+
+static cairo_surface_t *
+_get_image (cairo_xcb_surface_t *surface,
+ cairo_bool_t use_shm,
+ int x, int y,
+ int width, int height)
+{
+ cairo_surface_t *image;
+ cairo_xcb_connection_t *connection;
+ xcb_get_image_reply_t *reply;
+ cairo_int_status_t status;
+
+ assert (surface->fallback == NULL);
+ assert (x >= 0);
+ assert (y >= 0);
+ assert (x + width <= surface->width);
+ assert (y + height <= surface->height);
+
+ if (surface->deferred_clear) {
+ image =
+ _cairo_image_surface_create_with_pixman_format (NULL,
+ surface->pixman_format,
+ width, height,
+ 0);
+ if (surface->deferred_clear_color.alpha_short > 0x00ff) {
+ cairo_solid_pattern_t solid;
+
+ _cairo_pattern_init_solid (&solid, &surface->deferred_clear_color);
+ status = _cairo_surface_paint (image,
+ CAIRO_OPERATOR_SOURCE,
+ &solid.base,
+ NULL);
+ if (unlikely (status)) {
+ cairo_surface_destroy (image);
+ image = _cairo_surface_create_in_error (status);
+ }
+ }
+ return image;
+ }
+
+ connection = surface->connection;
+
+ status = _cairo_xcb_connection_acquire (connection);
+ if (unlikely (status))
+ return _cairo_surface_create_in_error (status);
+
+ if (use_shm) {
+ image = _get_shm_image (surface, x, y, width, height);
+ if (image) {
+ if (image->status == CAIRO_STATUS_SUCCESS) {
+ _cairo_xcb_connection_release (connection);
+ return image;
+ }
+ cairo_surface_destroy (image);
+ }
+ }
+
+ reply =_cairo_xcb_connection_get_image (connection,
+ surface->drawable,
+ x, y,
+ width, height);
+
+ if (reply == NULL && ! surface->owns_pixmap) {
+ /* xcb_get_image_t from a window is dangerous because it can
+ * produce errors if the window is unmapped or partially
+ * outside the screen. We could check for errors and
+ * retry, but to keep things simple, we just create a
+ * temporary pixmap
+ *
+ * If we hit this fallback too often, we should remember so and
+ * skip the round-trip from the above GetImage request,
+ * similar to what cairo-xlib does.
+ */
+ xcb_pixmap_t pixmap;
+ xcb_gcontext_t gc;
+
+ gc = _cairo_xcb_screen_get_gc (surface->screen,
+ surface->drawable,
+ surface->depth);
+ pixmap = _cairo_xcb_connection_create_pixmap (connection,
+ surface->depth,
+ surface->drawable,
+ width, height);
+
+ /* XXX IncludeInferiors? */
+ _cairo_xcb_connection_copy_area (connection,
+ surface->drawable,
+ pixmap, gc,
+ x, y,
+ 0, 0,
+ width, height);
+
+ _cairo_xcb_screen_put_gc (surface->screen, surface->depth, gc);
+
+ reply = _cairo_xcb_connection_get_image (connection,
+ pixmap,
+ 0, 0,
+ width, height);
+ _cairo_xcb_connection_free_pixmap (connection, pixmap);
+ }
+
+ if (unlikely (reply == NULL)) {
+ status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ goto FAIL;
+ }
+
+ /* XXX byte swap */
+ /* XXX format conversion */
+ assert (reply->depth == surface->depth);
+
+ image = _cairo_image_surface_create_with_pixman_format
+ (xcb_get_image_data (reply),
+ surface->pixman_format,
+ width, height,
+ CAIRO_STRIDE_FOR_WIDTH_BPP (width,
+ PIXMAN_FORMAT_BPP (surface->pixman_format)));
+ status = image->status;
+ if (unlikely (status)) {
+ free (reply);
+ goto FAIL;
+ }
+
+ /* XXX */
+ pixman_image_set_destroy_function (((cairo_image_surface_t *)image)->pixman_image, _destroy_image, reply);
+
+ _cairo_xcb_connection_release (connection);
+
+ return image;
+
+FAIL:
+ _cairo_xcb_connection_release (connection);
+ return _cairo_surface_create_in_error (status);
+}
+
+static cairo_surface_t *
+_cairo_xcb_surface_source (void *abstract_surface,
+ cairo_rectangle_int_t *extents)
+{
+ cairo_xcb_surface_t *surface = abstract_surface;
+
+ if (extents) {
+ extents->x = extents->y = 0;
+ extents->width = surface->width;
+ extents->height = surface->height;
+ }
+
+ return &surface->base;
+}
+
+static cairo_status_t
+_cairo_xcb_surface_acquire_source_image (void *abstract_surface,
+ cairo_image_surface_t **image_out,
+ void **image_extra)
+{
+ cairo_xcb_surface_t *surface = abstract_surface;
+ cairo_surface_t *image;
+
+ if (surface->fallback != NULL) {
+ image = cairo_surface_reference (&surface->fallback->base);
+ goto DONE;
+ }
+
+ image = _cairo_surface_has_snapshot (&surface->base,
+ &_cairo_image_surface_backend);
+ if (image != NULL) {
+ image = cairo_surface_reference (image);
+ goto DONE;
+ }
+
+ image = _get_image (surface, FALSE, 0, 0, surface->width, surface->height);
+ if (unlikely (image->status))
+ return image->status;
+
+ _cairo_surface_attach_snapshot (&surface->base, image, NULL);
+
+DONE:
+ *image_out = (cairo_image_surface_t *) image;
+ *image_extra = NULL;
+ return CAIRO_STATUS_SUCCESS;
+}
+
+static void
+_cairo_xcb_surface_release_source_image (void *abstract_surface,
+ cairo_image_surface_t *image,
+ void *image_extra)
+{
+ cairo_surface_destroy (&image->base);
+}
+
+cairo_bool_t
+_cairo_xcb_surface_get_extents (void *abstract_surface,
+ cairo_rectangle_int_t *extents)
+{
+ cairo_xcb_surface_t *surface = abstract_surface;
+
+ extents->x = extents->y = 0;
+ extents->width = surface->width;
+ extents->height = surface->height;
+ return TRUE;
+}
+
+static void
+_cairo_xcb_surface_get_font_options (void *abstract_surface,
+ cairo_font_options_t *options)
+{
+ cairo_xcb_surface_t *surface = abstract_surface;
+
+ *options = *_cairo_xcb_screen_get_font_options (surface->screen);
+}
+
+static cairo_status_t
+_put_shm_image (cairo_xcb_surface_t *surface,
+ xcb_gcontext_t gc,
+ cairo_image_surface_t *image)
+{
+#if CAIRO_HAS_XCB_SHM_FUNCTIONS
+ cairo_xcb_shm_info_t *shm_info;
+
+ shm_info = _cairo_user_data_array_get_data (&image->base.user_data,
+ (const cairo_user_data_key_t *) surface->connection);
+ if (shm_info == NULL)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ _cairo_xcb_connection_shm_put_image (surface->connection,
+ surface->drawable,
+ gc,
+ surface->width, surface->height,
+ 0, 0,
+ image->width, image->height,
+ image->base.device_transform_inverse.x0,
+ image->base.device_transform_inverse.y0,
+ image->depth,
+ shm_info->shm,
+ shm_info->offset);
+
+ return CAIRO_STATUS_SUCCESS;
+#else
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+#endif
+}
+
+static cairo_status_t
+_put_image (cairo_xcb_surface_t *surface,
+ cairo_image_surface_t *image)
+{
+ cairo_int_status_t status = CAIRO_INT_STATUS_SUCCESS;
+
+ /* XXX track damaged region? */
+
+ status = _cairo_xcb_connection_acquire (surface->connection);
+ if (unlikely (status))
+ return status;
+
+ if (image->pixman_format == surface->pixman_format) {
+ xcb_gcontext_t gc;
+
+ assert (image->depth == surface->depth);
+ assert (image->stride == (int) CAIRO_STRIDE_FOR_WIDTH_BPP (image->width, PIXMAN_FORMAT_BPP (image->pixman_format)));
+
+ gc = _cairo_xcb_screen_get_gc (surface->screen,
+ surface->drawable,
+ surface->depth);
+
+ status = _put_shm_image (surface, gc, image);
+ if (status == CAIRO_INT_STATUS_UNSUPPORTED) {
+ _cairo_xcb_connection_put_image (surface->connection,
+ surface->drawable, gc,
+ image->width, image->height,
+ image->base.device_transform_inverse.x0,
+ image->base.device_transform_inverse.y0,
+ image->depth,
+ image->stride,
+ image->data);
+ status = CAIRO_STATUS_SUCCESS;
+ }
+
+ _cairo_xcb_screen_put_gc (surface->screen, surface->depth, gc);
+ } else {
+ ASSERT_NOT_REACHED;
+ }
+
+ _cairo_xcb_connection_release (surface->connection);
+ return status;
+}
+
+static cairo_int_status_t
+_put_shm_image_boxes (cairo_xcb_surface_t *surface,
+ cairo_image_surface_t *image,
+ xcb_gcontext_t gc,
+ cairo_boxes_t *boxes)
+{
+#if CAIRO_HAS_XCB_SHM_FUNCTIONS
+ cairo_xcb_shm_info_t *shm_info;
+
+ shm_info = _cairo_user_data_array_get_data (&image->base.user_data,
+ (const cairo_user_data_key_t *) surface->connection);
+ if (shm_info != NULL) {
+ struct _cairo_boxes_chunk *chunk;
+
+ for (chunk = &boxes->chunks; chunk; chunk = chunk->next) {
+ int i;
+
+ for (i = 0; i < chunk->count; i++) {
+ cairo_box_t *b = &chunk->base[i];
+ int x = _cairo_fixed_integer_part (b->p1.x);
+ int y = _cairo_fixed_integer_part (b->p1.y);
+ int width = _cairo_fixed_integer_part (b->p2.x - b->p1.x);
+ int height = _cairo_fixed_integer_part (b->p2.y - b->p1.y);
+
+ _cairo_xcb_connection_shm_put_image (surface->connection,
+ surface->drawable,
+ gc,
+ surface->width, surface->height,
+ x, y,
+ width, height,
+ x, y,
+ image->depth,
+ shm_info->shm,
+ shm_info->offset);
+ }
+ }
+ }
+
+ return CAIRO_INT_STATUS_SUCCESS;
+#endif
+
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+}
+
+static cairo_status_t
+_put_image_boxes (cairo_xcb_surface_t *surface,
+ cairo_image_surface_t *image,
+ cairo_boxes_t *boxes)
+{
+ cairo_int_status_t status = CAIRO_INT_STATUS_SUCCESS;
+ xcb_gcontext_t gc;
+
+ if (boxes->num_boxes == 0)
+ return CAIRO_STATUS_SUCCESS;
+
+ /* XXX track damaged region? */
+
+ status = _cairo_xcb_connection_acquire (surface->connection);
+ if (unlikely (status))
+ return status;
+
+ assert (image->pixman_format == surface->pixman_format);
+ assert (image->depth == surface->depth);
+ assert (image->stride == (int) CAIRO_STRIDE_FOR_WIDTH_BPP (image->width, PIXMAN_FORMAT_BPP (image->pixman_format)));
+
+ gc = _cairo_xcb_screen_get_gc (surface->screen,
+ surface->drawable,
+ surface->depth);
+
+ status = _put_shm_image_boxes (surface, image, gc, boxes);
+ if (status == CAIRO_INT_STATUS_UNSUPPORTED) {
+ struct _cairo_boxes_chunk *chunk;
+
+ for (chunk = &boxes->chunks; chunk; chunk = chunk->next) {
+ int i;
+
+ for (i = 0; i < chunk->count; i++) {
+ cairo_box_t *b = &chunk->base[i];
+ int x = _cairo_fixed_integer_part (b->p1.x);
+ int y = _cairo_fixed_integer_part (b->p1.y);
+ int width = _cairo_fixed_integer_part (b->p2.x - b->p1.x);
+ int height = _cairo_fixed_integer_part (b->p2.y - b->p1.y);
+ _cairo_xcb_connection_put_image (surface->connection,
+ surface->drawable, gc,
+ width, height,
+ x, y,
+ image->depth,
+ image->stride,
+ image->data +
+ x * PIXMAN_FORMAT_BPP (image->pixman_format) / 8 +
+ y * image->stride);
+
+ }
+ }
+ status = CAIRO_STATUS_SUCCESS;
+ }
+
+ _cairo_xcb_screen_put_gc (surface->screen, surface->depth, gc);
+ _cairo_xcb_connection_release (surface->connection);
+ return status;
+}
+
+static cairo_status_t
+_cairo_xcb_surface_flush (void *abstract_surface,
+ unsigned flags)
+{
+ cairo_xcb_surface_t *surface = abstract_surface;
+ cairo_status_t status;
+
+ if (flags)
+ return CAIRO_STATUS_SUCCESS;
+
+ if (likely (surface->fallback == NULL)) {
+ status = CAIRO_STATUS_SUCCESS;
+ if (! surface->base.finished && surface->deferred_clear)
+ status = _cairo_xcb_surface_clear (surface);
+
+ return status;
+ }
+
+ status = surface->base.status;
+ if (status == CAIRO_STATUS_SUCCESS &&
+ (! surface->base._finishing || ! surface->owns_pixmap)) {
+ status = cairo_surface_status (&surface->fallback->base);
+
+ if (status == CAIRO_STATUS_SUCCESS)
+ status = _cairo_bentley_ottmann_tessellate_boxes (&surface->fallback_damage,
+ CAIRO_FILL_RULE_WINDING,
+ &surface->fallback_damage);
+
+ if (status == CAIRO_STATUS_SUCCESS)
+ status = _put_image_boxes (surface,
+ surface->fallback,
+ &surface->fallback_damage);
+
+ if (status == CAIRO_STATUS_SUCCESS && ! surface->base._finishing) {
+ _cairo_surface_attach_snapshot (&surface->base,
+ &surface->fallback->base,
+ cairo_surface_finish);
+ }
+ }
+
+ _cairo_boxes_clear (&surface->fallback_damage);
+ cairo_surface_destroy (&surface->fallback->base);
+ surface->fallback = NULL;
+
+ return status;
+}
+
+static cairo_image_surface_t *
+_cairo_xcb_surface_map_to_image (void *abstract_surface,
+ const cairo_rectangle_int_t *extents)
+{
+ cairo_xcb_surface_t *surface = abstract_surface;
+ cairo_surface_t *image;
+ cairo_status_t status;
+
+ if (surface->fallback)
+ return _cairo_surface_map_to_image (&surface->fallback->base, extents);
+
+ image = _get_image (surface, TRUE,
+ extents->x, extents->y,
+ extents->width, extents->height);
+ status = cairo_surface_status (image);
+ if (unlikely (status)) {
+ cairo_surface_destroy(image);
+ return _cairo_image_surface_create_in_error (status);
+ }
+
+ /* Do we have a deferred clear and this image surface does NOT cover the
+ * whole xcb surface? Have to apply the clear in that case, else
+ * uploading the image will handle the problem for us.
+ */
+ if (surface->deferred_clear &&
+ ! (extents->width == surface->width &&
+ extents->height == surface->height)) {
+ status = _cairo_xcb_surface_clear (surface);
+ if (unlikely (status)) {
+ cairo_surface_destroy(image);
+ return _cairo_image_surface_create_in_error (status);
+ }
+ }
+ surface->deferred_clear = FALSE;
+
+ cairo_surface_set_device_offset (image, -extents->x, -extents->y);
+ return (cairo_image_surface_t *) image;
+}
+
+static cairo_int_status_t
+_cairo_xcb_surface_unmap (void *abstract_surface,
+ cairo_image_surface_t *image)
+{
+ cairo_xcb_surface_t *surface = abstract_surface;
+ cairo_int_status_t status;
+
+ if (surface->fallback)
+ return _cairo_surface_unmap_image (&surface->fallback->base, image);
+
+ status = _put_image (abstract_surface, image);
+
+ cairo_surface_finish (&image->base);
+ cairo_surface_destroy (&image->base);
+
+ return status;
+}
+
+static cairo_surface_t *
+_cairo_xcb_surface_fallback (cairo_xcb_surface_t *surface,
+ cairo_composite_rectangles_t *composite)
+{
+ cairo_image_surface_t *image;
+ cairo_status_t status;
+
+ status = _cairo_composite_rectangles_add_to_damage (composite,
+ &surface->fallback_damage);
+ if (unlikely (status))
+ return _cairo_surface_create_in_error (status);
+
+ if (surface->fallback)
+ return &surface->fallback->base;
+
+ image = (cairo_image_surface_t *)
+ _get_image (surface, TRUE, 0, 0, surface->width, surface->height);
+
+ /* If there was a deferred clear, _get_image applied it */
+ if (image->base.status == CAIRO_STATUS_SUCCESS) {
+ surface->deferred_clear = FALSE;
+
+ surface->fallback = image;
+ }
+
+ return &surface->fallback->base;
+}
+
+static cairo_int_status_t
+_cairo_xcb_fallback_compositor_paint (const cairo_compositor_t *compositor,
+ cairo_composite_rectangles_t *extents)
+{
+ cairo_xcb_surface_t *surface = (cairo_xcb_surface_t *) extents->surface;
+ cairo_surface_t *fallback = _cairo_xcb_surface_fallback (surface, extents);
+
+ return _cairo_surface_paint (fallback, extents->op,
+ &extents->source_pattern.base,
+ extents->clip);
+}
+
+static cairo_int_status_t
+_cairo_xcb_fallback_compositor_mask (const cairo_compositor_t *compositor,
+ cairo_composite_rectangles_t *extents)
+{
+ cairo_xcb_surface_t *surface = (cairo_xcb_surface_t *) extents->surface;
+ cairo_surface_t *fallback = _cairo_xcb_surface_fallback (surface, extents);
+
+ return _cairo_surface_mask (fallback, extents->op,
+ &extents->source_pattern.base,
+ &extents->mask_pattern.base,
+ extents->clip);
+}
+
+static cairo_int_status_t
+_cairo_xcb_fallback_compositor_stroke (const cairo_compositor_t *compositor,
+ cairo_composite_rectangles_t *extents,
+ 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)
+{
+ cairo_xcb_surface_t *surface = (cairo_xcb_surface_t *) extents->surface;
+ cairo_surface_t *fallback = _cairo_xcb_surface_fallback (surface, extents);
+
+ return _cairo_surface_stroke (fallback, extents->op,
+ &extents->source_pattern.base,
+ path, style, ctm, ctm_inverse,
+ tolerance, antialias,
+ extents->clip);
+}
+
+static cairo_int_status_t
+_cairo_xcb_fallback_compositor_fill (const cairo_compositor_t *compositor,
+ cairo_composite_rectangles_t *extents,
+ const cairo_path_fixed_t *path,
+ cairo_fill_rule_t fill_rule,
+ double tolerance,
+ cairo_antialias_t antialias)
+{
+ cairo_xcb_surface_t *surface = (cairo_xcb_surface_t *) extents->surface;
+ cairo_surface_t *fallback = _cairo_xcb_surface_fallback (surface, extents);
+
+ return _cairo_surface_fill (fallback, extents->op,
+ &extents->source_pattern.base,
+ path, fill_rule, tolerance,
+ antialias, extents->clip);
+}
+
+static cairo_int_status_t
+_cairo_xcb_fallback_compositor_glyphs (const cairo_compositor_t *compositor,
+ cairo_composite_rectangles_t *extents,
+ cairo_scaled_font_t *scaled_font,
+ cairo_glyph_t *glyphs,
+ int num_glyphs,
+ cairo_bool_t overlap)
+{
+ cairo_xcb_surface_t *surface = (cairo_xcb_surface_t *) extents->surface;
+ cairo_surface_t *fallback = _cairo_xcb_surface_fallback (surface, extents);
+
+ return _cairo_surface_show_text_glyphs (fallback, extents->op,
+ &extents->source_pattern.base,
+ NULL, 0, glyphs, num_glyphs,
+ NULL, 0, 0,
+ scaled_font, extents->clip);
+}
+
+static const cairo_compositor_t _cairo_xcb_fallback_compositor = {
+ &__cairo_no_compositor,
+
+ _cairo_xcb_fallback_compositor_paint,
+ _cairo_xcb_fallback_compositor_mask,
+ _cairo_xcb_fallback_compositor_stroke,
+ _cairo_xcb_fallback_compositor_fill,
+ _cairo_xcb_fallback_compositor_glyphs,
+};
+
+static const cairo_compositor_t _cairo_xcb_render_compositor = {
+ &_cairo_xcb_fallback_compositor,
+
+ _cairo_xcb_render_compositor_paint,
+ _cairo_xcb_render_compositor_mask,
+ _cairo_xcb_render_compositor_stroke,
+ _cairo_xcb_render_compositor_fill,
+ _cairo_xcb_render_compositor_glyphs,
+};
+
+static inline const cairo_compositor_t *
+get_compositor (cairo_surface_t **s)
+{
+ cairo_xcb_surface_t *surface = (cairo_xcb_surface_t * )*s;
+ if (surface->fallback) {
+ *s = &surface->fallback->base;
+ return ((cairo_image_surface_t *) *s)->compositor;
+ }
+
+ return &_cairo_xcb_render_compositor;
+}
+
+static cairo_int_status_t
+_cairo_xcb_surface_paint (void *abstract_surface,
+ cairo_operator_t op,
+ const cairo_pattern_t *source,
+ const cairo_clip_t *clip)
+{
+ cairo_surface_t *surface = abstract_surface;
+ const cairo_compositor_t *compositor = get_compositor (&surface);
+ return _cairo_compositor_paint (compositor, surface, op, source, clip);
+}
+
+static cairo_int_status_t
+_cairo_xcb_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_surface_t *surface = abstract_surface;
+ const cairo_compositor_t *compositor = get_compositor (&surface);
+ return _cairo_compositor_mask (compositor, surface, op, source, mask, clip);
+}
+
+static cairo_int_status_t
+_cairo_xcb_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_surface_t *surface = abstract_surface;
+ const cairo_compositor_t *compositor = get_compositor (&surface);
+ return _cairo_compositor_stroke (compositor, surface, op, source,
+ path, style, ctm, ctm_inverse,
+ tolerance, antialias, clip);
+}
+
+static cairo_int_status_t
+_cairo_xcb_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_surface_t *surface = abstract_surface;
+ const cairo_compositor_t *compositor = get_compositor (&surface);
+ return _cairo_compositor_fill (compositor, surface, op,
+ source, path, fill_rule,
+ tolerance, antialias, clip);
+}
+
+static cairo_int_status_t
+_cairo_xcb_surface_glyphs (void *abstract_surface,
+ cairo_operator_t op,
+ const cairo_pattern_t *source,
+ cairo_glyph_t *glyphs,
+ int num_glyphs,
+ cairo_scaled_font_t *scaled_font,
+ const cairo_clip_t *clip)
+{
+ cairo_surface_t *surface = abstract_surface;
+ const cairo_compositor_t *compositor = get_compositor (&surface);
+ return _cairo_compositor_glyphs (compositor, surface, op,
+ source, glyphs, num_glyphs,
+ scaled_font, clip);
+}
+
+const cairo_surface_backend_t _cairo_xcb_surface_backend = {
+ CAIRO_SURFACE_TYPE_XCB,
+ _cairo_xcb_surface_finish,
+ _cairo_default_context_create,
+
+ _cairo_xcb_surface_create_similar,
+ _cairo_xcb_surface_create_similar_image,
+ _cairo_xcb_surface_map_to_image,
+ _cairo_xcb_surface_unmap,
+
+ _cairo_xcb_surface_source,
+ _cairo_xcb_surface_acquire_source_image,
+ _cairo_xcb_surface_release_source_image,
+ NULL, /* snapshot */
+
+
+ NULL, /* copy_page */
+ NULL, /* show_page */
+
+ _cairo_xcb_surface_get_extents,
+ _cairo_xcb_surface_get_font_options,
+
+ _cairo_xcb_surface_flush,
+ NULL,
+
+ _cairo_xcb_surface_paint,
+ _cairo_xcb_surface_mask,
+ _cairo_xcb_surface_stroke,
+ _cairo_xcb_surface_fill,
+ NULL, /* fill-stroke */
+ _cairo_xcb_surface_glyphs,
+};
+
+cairo_surface_t *
+_cairo_xcb_surface_create_internal (cairo_xcb_screen_t *screen,
+ xcb_drawable_t drawable,
+ cairo_bool_t owns_pixmap,
+ pixman_format_code_t pixman_format,
+ xcb_render_pictformat_t xrender_format,
+ int width,
+ int height)
+{
+ cairo_xcb_surface_t *surface;
+
+ surface = malloc (sizeof (cairo_xcb_surface_t));
+ if (unlikely (surface == NULL))
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
+
+ _cairo_surface_init (&surface->base,
+ &_cairo_xcb_surface_backend,
+ &screen->connection->device,
+ _cairo_content_from_pixman_format (pixman_format));
+
+ surface->connection = _cairo_xcb_connection_reference (screen->connection);
+ surface->screen = screen;
+ cairo_list_add (&surface->link, &screen->surfaces);
+
+ surface->drawable = drawable;
+ surface->owns_pixmap = owns_pixmap;
+
+ surface->deferred_clear = FALSE;
+ surface->deferred_clear_color = *CAIRO_COLOR_TRANSPARENT;
+
+ surface->width = width;
+ surface->height = height;
+ surface->depth = PIXMAN_FORMAT_DEPTH (pixman_format);
+
+ surface->picture = XCB_NONE;
+ if (screen->connection->force_precision != -1)
+ surface->precision = screen->connection->force_precision;
+ else
+ surface->precision = XCB_RENDER_POLY_MODE_IMPRECISE;
+
+ surface->pixman_format = pixman_format;
+ surface->xrender_format = xrender_format;
+
+ surface->fallback = NULL;
+ _cairo_boxes_init (&surface->fallback_damage);
+
+ return &surface->base;
+}
+
+static xcb_screen_t *
+_cairo_xcb_screen_from_visual (xcb_connection_t *connection,
+ xcb_visualtype_t *visual,
+ int *depth)
+{
+ xcb_depth_iterator_t d;
+ xcb_screen_iterator_t s;
+
+ s = xcb_setup_roots_iterator (xcb_get_setup (connection));
+ for (; s.rem; xcb_screen_next (&s)) {
+ if (s.data->root_visual == visual->visual_id) {
+ *depth = s.data->root_depth;
+ return s.data;
+ }
+
+ d = xcb_screen_allowed_depths_iterator(s.data);
+ for (; d.rem; xcb_depth_next (&d)) {
+ xcb_visualtype_iterator_t v = xcb_depth_visuals_iterator (d.data);
+
+ for (; v.rem; xcb_visualtype_next (&v)) {
+ if (v.data->visual_id == visual->visual_id) {
+ *depth = d.data->depth;
+ return s.data;
+ }
+ }
+ }
+ }
+
+ return NULL;
+}
+
+/**
+ * cairo_xcb_surface_create:
+ * @connection: an XCB connection
+ * @drawable: an XCB drawable
+ * @visual: the visual to use for drawing to @drawable. The depth
+ * of the visual must match the depth of the drawable.
+ * Currently, only TrueColor visuals are fully supported.
+ * @width: the current width of @drawable
+ * @height: the current height of @drawable
+ *
+ * Creates an XCB surface that draws to the given drawable.
+ * The way that colors are represented in the drawable is specified
+ * by the provided visual.
+ *
+ * Note: If @drawable is a Window, then the function
+ * cairo_xcb_surface_set_size() must be called whenever the size of the
+ * window changes.
+ *
+ * When @drawable is a Window containing child windows then drawing to
+ * the created surface will be clipped by those child windows. When
+ * the created surface is used as a source, the contents of the
+ * children will be included.
+ *
+ * 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: 1.12
+ **/
+cairo_surface_t *
+cairo_xcb_surface_create (xcb_connection_t *connection,
+ xcb_drawable_t drawable,
+ xcb_visualtype_t *visual,
+ int width,
+ int height)
+{
+ cairo_xcb_screen_t *screen;
+ xcb_screen_t *xcb_screen;
+ cairo_format_masks_t image_masks;
+ pixman_format_code_t pixman_format;
+ xcb_render_pictformat_t xrender_format;
+ int depth;
+
+ if (xcb_connection_has_error (connection))
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_WRITE_ERROR));
+
+ if (unlikely (width > XLIB_COORD_MAX || height > XLIB_COORD_MAX))
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_SIZE));
+ if (unlikely (width <= 0 || height <= 0))
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_SIZE));
+
+ xcb_screen = _cairo_xcb_screen_from_visual (connection, visual, &depth);
+ if (unlikely (xcb_screen == NULL))
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_VISUAL));
+
+ image_masks.alpha_mask = 0;
+ image_masks.red_mask = visual->red_mask;
+ image_masks.green_mask = visual->green_mask;
+ image_masks.blue_mask = visual->blue_mask;
+ if (depth == 32) /* XXX visuals have no alpha! */
+ image_masks.alpha_mask =
+ 0xffffffff & ~(visual->red_mask | visual->green_mask | visual->blue_mask);
+ if (depth > 16)
+ image_masks.bpp = 32;
+ else if (depth > 8)
+ image_masks.bpp = 16;
+ else if (depth > 1)
+ image_masks.bpp = 8;
+ else
+ image_masks.bpp = 1;
+
+ if (! _pixman_format_from_masks (&image_masks, &pixman_format))
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_FORMAT));
+
+ screen = _cairo_xcb_screen_get (connection, xcb_screen);
+ if (unlikely (screen == NULL))
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
+
+ xrender_format =
+ _cairo_xcb_connection_get_xrender_format_for_visual (screen->connection,
+ visual->visual_id);
+
+ return _cairo_xcb_surface_create_internal (screen, drawable, FALSE,
+ pixman_format,
+ xrender_format,
+ width, height);
+}
+#if CAIRO_HAS_XLIB_XCB_FUNCTIONS
+slim_hidden_def (cairo_xcb_surface_create);
+#endif
+
+/**
+ * cairo_xcb_surface_create_for_bitmap:
+ * @connection: an XCB connection
+ * @screen: the XCB screen associated with @bitmap
+ * @bitmap: an XCB drawable (a Pixmap with depth 1)
+ * @width: the current width of @bitmap
+ * @height: the current height of @bitmap
+ *
+ * Creates an XCB surface that draws to the given bitmap.
+ * This will be drawn to as a %CAIRO_FORMAT_A1 object.
+ *
+ * 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: 1.12
+ **/
+cairo_surface_t *
+cairo_xcb_surface_create_for_bitmap (xcb_connection_t *connection,
+ xcb_screen_t *screen,
+ xcb_pixmap_t bitmap,
+ int width,
+ int height)
+{
+ cairo_xcb_screen_t *cairo_xcb_screen;
+
+ if (xcb_connection_has_error (connection))
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_WRITE_ERROR));
+
+ if (width > XLIB_COORD_MAX || height > XLIB_COORD_MAX)
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_SIZE));
+ if (unlikely (width <= 0 || height <= 0))
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_SIZE));
+
+ cairo_xcb_screen = _cairo_xcb_screen_get (connection, screen);
+ if (unlikely (cairo_xcb_screen == NULL))
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
+
+ return _cairo_xcb_surface_create_internal (cairo_xcb_screen, bitmap, FALSE,
+ PIXMAN_a1,
+ cairo_xcb_screen->connection->standard_formats[CAIRO_FORMAT_A1],
+ width, height);
+}
+#if CAIRO_HAS_XLIB_XCB_FUNCTIONS
+slim_hidden_def (cairo_xcb_surface_create_for_bitmap);
+#endif
+
+/**
+ * cairo_xcb_surface_create_with_xrender_format:
+ * @connection: an XCB connection
+ * @drawable: an XCB drawable
+ * @screen: the XCB screen associated with @drawable
+ * @format: the picture format to use for drawing to @drawable. The
+ * depth of @format mush match the depth of the drawable.
+ * @width: the current width of @drawable
+ * @height: the current height of @drawable
+ *
+ * Creates an XCB surface that draws to the given drawable.
+ * The way that colors are represented in the drawable is specified
+ * by the provided picture format.
+ *
+ * Note: If @drawable is a Window, then the function
+ * cairo_xcb_surface_set_size() must be called whenever the size of the
+ * window changes.
+ *
+ * When @drawable is a Window containing child windows then drawing to
+ * the created surface will be clipped by those child windows. When
+ * the created surface is used as a source, the contents of the
+ * children will be included.
+ *
+ * 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: 1.12
+ **/
+cairo_surface_t *
+cairo_xcb_surface_create_with_xrender_format (xcb_connection_t *connection,
+ xcb_screen_t *screen,
+ xcb_drawable_t drawable,
+ xcb_render_pictforminfo_t *format,
+ int width,
+ int height)
+{
+ cairo_xcb_screen_t *cairo_xcb_screen;
+ cairo_format_masks_t image_masks;
+ pixman_format_code_t pixman_format;
+
+ if (xcb_connection_has_error (connection))
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_WRITE_ERROR));
+
+ if (width > XLIB_COORD_MAX || height > XLIB_COORD_MAX)
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_SIZE));
+ if (unlikely (width <= 0 || height <= 0))
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_SIZE));
+
+ image_masks.alpha_mask =
+ (unsigned long) format->direct.alpha_mask << format->direct.alpha_shift;
+ image_masks.red_mask =
+ (unsigned long) format->direct.red_mask << format->direct.red_shift;
+ image_masks.green_mask =
+ (unsigned long) format->direct.green_mask << format->direct.green_shift;
+ image_masks.blue_mask =
+ (unsigned long) format->direct.blue_mask << format->direct.blue_shift;
+#if 0
+ image_masks.bpp = format->depth;
+#else
+ if (format->depth > 16)
+ image_masks.bpp = 32;
+ else if (format->depth > 8)
+ image_masks.bpp = 16;
+ else if (format->depth > 1)
+ image_masks.bpp = 8;
+ else
+ image_masks.bpp = 1;
+#endif
+
+ if (! _pixman_format_from_masks (&image_masks, &pixman_format))
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_FORMAT));
+
+ cairo_xcb_screen = _cairo_xcb_screen_get (connection, screen);
+ if (unlikely (cairo_xcb_screen == NULL))
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
+
+ return _cairo_xcb_surface_create_internal (cairo_xcb_screen,
+ drawable,
+ FALSE,
+ pixman_format,
+ format->id,
+ width, height);
+}
+#if CAIRO_HAS_XLIB_XCB_FUNCTIONS
+slim_hidden_def (cairo_xcb_surface_create_with_xrender_format);
+#endif
+
+/* This does the necessary fixup when a surface's drawable or size changed. */
+static void
+_drawable_changed (cairo_xcb_surface_t *surface)
+{
+ _cairo_surface_set_error (&surface->base,
+ _cairo_surface_begin_modification (&surface->base));
+ _cairo_boxes_clear (&surface->fallback_damage);
+ cairo_surface_destroy (&surface->fallback->base);
+
+ surface->deferred_clear = FALSE;
+ surface->fallback = NULL;
+}
+
+/**
+ * cairo_xcb_surface_set_size:
+ * @surface: a #cairo_surface_t for the XCB backend
+ * @width: the new width of the surface
+ * @height: the new height of the surface
+ *
+ * Informs cairo of the new size of the XCB drawable underlying the
+ * surface. For a surface created for a window (rather than a pixmap),
+ * this function must be called each time the size of the window
+ * changes. (For a subwindow, you are normally resizing the window
+ * yourself, but for a toplevel window, it is necessary to listen for
+ * ConfigureNotify events.)
+ *
+ * A pixmap can never change size, so it is never necessary to call
+ * this function on a surface created for a pixmap.
+ *
+ * If cairo_surface_flush() wasn't called, some pending operations
+ * might be discarded.
+ *
+ * Since: 1.12
+ **/
+void
+cairo_xcb_surface_set_size (cairo_surface_t *abstract_surface,
+ int width,
+ int height)
+{
+ cairo_xcb_surface_t *surface;
+
+ if (unlikely (abstract_surface->status))
+ return;
+ if (unlikely (abstract_surface->finished)) {
+ _cairo_surface_set_error (abstract_surface,
+ _cairo_error (CAIRO_STATUS_SURFACE_FINISHED));
+ return;
+ }
+
+
+ if ( !_cairo_surface_is_xcb(abstract_surface)) {
+ _cairo_surface_set_error (abstract_surface,
+ _cairo_error (CAIRO_STATUS_SURFACE_TYPE_MISMATCH));
+ return;
+ }
+
+ if (width > XLIB_COORD_MAX || height > XLIB_COORD_MAX || width <= 0 || height <= 0) {
+ _cairo_surface_set_error (abstract_surface,
+ _cairo_error (CAIRO_STATUS_INVALID_SIZE));
+ return;
+ }
+
+ surface = (cairo_xcb_surface_t *) abstract_surface;
+
+ _drawable_changed(surface);
+ surface->width = width;
+ surface->height = height;
+}
+#if CAIRO_HAS_XLIB_XCB_FUNCTIONS
+slim_hidden_def (cairo_xcb_surface_set_size);
+#endif
+
+/**
+ * cairo_xcb_surface_set_drawable:
+ * @surface: a #cairo_surface_t for the XCB backend
+ * @drawable: the new drawable of the surface
+ * @width: the new width of the surface
+ * @height: the new height of the surface
+ *
+ * Informs cairo of the new drawable and size of the XCB drawable underlying the
+ * surface.
+ *
+ * If cairo_surface_flush() wasn't called, some pending operations
+ * might be discarded.
+ *
+ * Since: 1.12
+ **/
+void
+cairo_xcb_surface_set_drawable (cairo_surface_t *abstract_surface,
+ xcb_drawable_t drawable,
+ int width,
+ int height)
+{
+ cairo_xcb_surface_t *surface;
+
+ if (unlikely (abstract_surface->status))
+ return;
+ if (unlikely (abstract_surface->finished)) {
+ _cairo_surface_set_error (abstract_surface,
+ _cairo_error (CAIRO_STATUS_SURFACE_FINISHED));
+ return;
+ }
+
+
+ if ( !_cairo_surface_is_xcb(abstract_surface)) {
+ _cairo_surface_set_error (abstract_surface,
+ _cairo_error (CAIRO_STATUS_SURFACE_TYPE_MISMATCH));
+ return;
+ }
+
+ if (width > XLIB_COORD_MAX || height > XLIB_COORD_MAX || width <= 0 || height <= 0) {
+ _cairo_surface_set_error (abstract_surface,
+ _cairo_error (CAIRO_STATUS_INVALID_SIZE));
+ return;
+ }
+
+ surface = (cairo_xcb_surface_t *) abstract_surface;
+
+ /* XXX: and what about this case? */
+ if (surface->owns_pixmap)
+ return;
+
+ _drawable_changed (surface);
+
+ if (surface->drawable != drawable) {
+ cairo_status_t status;
+ status = _cairo_xcb_connection_acquire (surface->connection);
+ if (unlikely (status))
+ return;
+
+ if (surface->picture != XCB_NONE) {
+ _cairo_xcb_connection_render_free_picture (surface->connection,
+ surface->picture);
+ surface->picture = XCB_NONE;
+ }
+
+ _cairo_xcb_connection_release (surface->connection);
+
+ surface->drawable = drawable;
+ }
+ surface->width = width;
+ surface->height = height;
+}
+#if CAIRO_HAS_XLIB_XCB_FUNCTIONS
+slim_hidden_def (cairo_xcb_surface_set_drawable);
+#endif