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-rw-r--r--src/cairo-gl-surface.c1459
1 files changed, 1459 insertions, 0 deletions
diff --git a/src/cairo-gl-surface.c b/src/cairo-gl-surface.c
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+++ b/src/cairo-gl-surface.c
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+/* cairo - a vector graphics library with display and print output
+ *
+ * Copyright © 2009 Eric Anholt
+ * Copyright © 2009 Chris Wilson
+ * Copyright © 2005,2010 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):
+ * Benjamin Otte <otte@gnome.org>
+ * Carl Worth <cworth@cworth.org>
+ * Chris Wilson <chris@chris-wilson.co.uk>
+ * Eric Anholt <eric@anholt.net>
+ */
+
+#include "cairoint.h"
+
+#include "cairo-gl-private.h"
+
+#include "cairo-composite-rectangles-private.h"
+#include "cairo-compositor-private.h"
+#include "cairo-default-context-private.h"
+#include "cairo-error-private.h"
+#include "cairo-image-surface-inline.h"
+#include "cairo-surface-backend-private.h"
+
+static const cairo_surface_backend_t _cairo_gl_surface_backend;
+
+static cairo_status_t
+_cairo_gl_surface_flush (void *abstract_surface, unsigned flags);
+
+static cairo_bool_t _cairo_surface_is_gl (cairo_surface_t *surface)
+{
+ return surface->backend == &_cairo_gl_surface_backend;
+}
+
+static cairo_bool_t
+_cairo_gl_get_image_format_and_type_gles2 (pixman_format_code_t pixman_format,
+ GLenum *internal_format, GLenum *format,
+ GLenum *type, cairo_bool_t *has_alpha,
+ cairo_bool_t *needs_swap)
+{
+ cairo_bool_t is_little_endian = _cairo_is_little_endian ();
+
+ *has_alpha = TRUE;
+
+ switch ((int) pixman_format) {
+ case PIXMAN_a8r8g8b8:
+ *internal_format = GL_BGRA;
+ *format = GL_BGRA;
+ *type = GL_UNSIGNED_BYTE;
+ *needs_swap = !is_little_endian;
+ return TRUE;
+
+ case PIXMAN_x8r8g8b8:
+ *internal_format = GL_BGRA;
+ *format = GL_BGRA;
+ *type = GL_UNSIGNED_BYTE;
+ *has_alpha = FALSE;
+ *needs_swap = !is_little_endian;
+ return TRUE;
+
+ case PIXMAN_a8b8g8r8:
+ *internal_format = GL_RGBA;
+ *format = GL_RGBA;
+ *type = GL_UNSIGNED_BYTE;
+ *needs_swap = !is_little_endian;
+ return TRUE;
+
+ case PIXMAN_x8b8g8r8:
+ *internal_format = GL_RGBA;
+ *format = GL_RGBA;
+ *type = GL_UNSIGNED_BYTE;
+ *has_alpha = FALSE;
+ *needs_swap = !is_little_endian;
+ return TRUE;
+
+ case PIXMAN_b8g8r8a8:
+ *internal_format = GL_BGRA;
+ *format = GL_BGRA;
+ *type = GL_UNSIGNED_BYTE;
+ *needs_swap = is_little_endian;
+ return TRUE;
+
+ case PIXMAN_b8g8r8x8:
+ *internal_format = GL_BGRA;
+ *format = GL_BGRA;
+ *type = GL_UNSIGNED_BYTE;
+ *has_alpha = FALSE;
+ *needs_swap = is_little_endian;
+ return TRUE;
+
+ case PIXMAN_r8g8b8:
+ *internal_format = GL_RGB;
+ *format = GL_RGB;
+ *type = GL_UNSIGNED_BYTE;
+ *needs_swap = is_little_endian;
+ return TRUE;
+
+ case PIXMAN_b8g8r8:
+ *internal_format = GL_RGB;
+ *format = GL_RGB;
+ *type = GL_UNSIGNED_BYTE;
+ *needs_swap = !is_little_endian;
+ return TRUE;
+
+ case PIXMAN_r5g6b5:
+ *internal_format = GL_RGB;
+ *format = GL_RGB;
+ *type = GL_UNSIGNED_SHORT_5_6_5;
+ *needs_swap = FALSE;
+ return TRUE;
+
+ case PIXMAN_b5g6r5:
+ *internal_format = GL_RGB;
+ *format = GL_RGB;
+ *type = GL_UNSIGNED_SHORT_5_6_5;
+ *needs_swap = TRUE;
+ return TRUE;
+
+ case PIXMAN_a1b5g5r5:
+ *internal_format = GL_RGBA;
+ *format = GL_RGBA;
+ *type = GL_UNSIGNED_SHORT_5_5_5_1;
+ *needs_swap = TRUE;
+ return TRUE;
+
+ case PIXMAN_x1b5g5r5:
+ *internal_format = GL_RGBA;
+ *format = GL_RGBA;
+ *type = GL_UNSIGNED_SHORT_5_5_5_1;
+ *has_alpha = FALSE;
+ *needs_swap = TRUE;
+ return TRUE;
+
+ case PIXMAN_a8:
+ *internal_format = GL_ALPHA;
+ *format = GL_ALPHA;
+ *type = GL_UNSIGNED_BYTE;
+ *needs_swap = FALSE;
+ return TRUE;
+
+ default:
+ return FALSE;
+ }
+}
+
+static cairo_bool_t
+_cairo_gl_get_image_format_and_type_gl (pixman_format_code_t pixman_format,
+ GLenum *internal_format, GLenum *format,
+ GLenum *type, cairo_bool_t *has_alpha,
+ cairo_bool_t *needs_swap)
+{
+ *has_alpha = TRUE;
+ *needs_swap = FALSE;
+
+ switch (pixman_format) {
+ case PIXMAN_a8r8g8b8:
+ *internal_format = GL_RGBA;
+ *format = GL_BGRA;
+ *type = GL_UNSIGNED_INT_8_8_8_8_REV;
+ return TRUE;
+ case PIXMAN_x8r8g8b8:
+ *internal_format = GL_RGB;
+ *format = GL_BGRA;
+ *type = GL_UNSIGNED_INT_8_8_8_8_REV;
+ *has_alpha = FALSE;
+ return TRUE;
+ case PIXMAN_a8b8g8r8:
+ *internal_format = GL_RGBA;
+ *format = GL_RGBA;
+ *type = GL_UNSIGNED_INT_8_8_8_8_REV;
+ return TRUE;
+ case PIXMAN_x8b8g8r8:
+ *internal_format = GL_RGB;
+ *format = GL_RGBA;
+ *type = GL_UNSIGNED_INT_8_8_8_8_REV;
+ *has_alpha = FALSE;
+ return TRUE;
+ case PIXMAN_b8g8r8a8:
+ *internal_format = GL_RGBA;
+ *format = GL_BGRA;
+ *type = GL_UNSIGNED_INT_8_8_8_8;
+ return TRUE;
+ case PIXMAN_b8g8r8x8:
+ *internal_format = GL_RGB;
+ *format = GL_BGRA;
+ *type = GL_UNSIGNED_INT_8_8_8_8;
+ *has_alpha = FALSE;
+ return TRUE;
+ case PIXMAN_r8g8b8:
+ *internal_format = GL_RGB;
+ *format = GL_RGB;
+ *type = GL_UNSIGNED_BYTE;
+ return TRUE;
+ case PIXMAN_b8g8r8:
+ *internal_format = GL_RGB;
+ *format = GL_BGR;
+ *type = GL_UNSIGNED_BYTE;
+ return TRUE;
+ case PIXMAN_r5g6b5:
+ *internal_format = GL_RGB;
+ *format = GL_RGB;
+ *type = GL_UNSIGNED_SHORT_5_6_5;
+ return TRUE;
+ case PIXMAN_b5g6r5:
+ *internal_format = GL_RGB;
+ *format = GL_RGB;
+ *type = GL_UNSIGNED_SHORT_5_6_5_REV;
+ return TRUE;
+ case PIXMAN_a1r5g5b5:
+ *internal_format = GL_RGBA;
+ *format = GL_BGRA;
+ *type = GL_UNSIGNED_SHORT_1_5_5_5_REV;
+ return TRUE;
+ case PIXMAN_x1r5g5b5:
+ *internal_format = GL_RGB;
+ *format = GL_BGRA;
+ *type = GL_UNSIGNED_SHORT_1_5_5_5_REV;
+ *has_alpha = FALSE;
+ return TRUE;
+ case PIXMAN_a1b5g5r5:
+ *internal_format = GL_RGBA;
+ *format = GL_RGBA;
+ *type = GL_UNSIGNED_SHORT_1_5_5_5_REV;
+ return TRUE;
+ case PIXMAN_x1b5g5r5:
+ *internal_format = GL_RGB;
+ *format = GL_RGBA;
+ *type = GL_UNSIGNED_SHORT_1_5_5_5_REV;
+ *has_alpha = FALSE;
+ return TRUE;
+ case PIXMAN_a8:
+ *internal_format = GL_ALPHA;
+ *format = GL_ALPHA;
+ *type = GL_UNSIGNED_BYTE;
+ return TRUE;
+
+#if PIXMAN_VERSION >= PIXMAN_VERSION_ENCODE(0,27,2)
+ case PIXMAN_a8r8g8b8_sRGB:
+#endif
+ case PIXMAN_a2b10g10r10:
+ case PIXMAN_x2b10g10r10:
+ case PIXMAN_a4r4g4b4:
+ case PIXMAN_x4r4g4b4:
+ case PIXMAN_a4b4g4r4:
+ case PIXMAN_x4b4g4r4:
+ case PIXMAN_r3g3b2:
+ case PIXMAN_b2g3r3:
+ case PIXMAN_a2r2g2b2:
+ case PIXMAN_a2b2g2r2:
+ case PIXMAN_c8:
+ case PIXMAN_x4a4:
+ /* case PIXMAN_x4c4: */
+ case PIXMAN_x4g4:
+ case PIXMAN_a4:
+ case PIXMAN_r1g2b1:
+ case PIXMAN_b1g2r1:
+ case PIXMAN_a1r1g1b1:
+ case PIXMAN_a1b1g1r1:
+ case PIXMAN_c4:
+ case PIXMAN_g4:
+ case PIXMAN_a1:
+ case PIXMAN_g1:
+ case PIXMAN_yuy2:
+ case PIXMAN_yv12:
+ case PIXMAN_x2r10g10b10:
+ case PIXMAN_a2r10g10b10:
+ case PIXMAN_r8g8b8x8:
+ case PIXMAN_r8g8b8a8:
+ case PIXMAN_x14r6g6b6:
+ default:
+ return FALSE;
+ }
+}
+
+/*
+ * Extracts pixel data from an image surface.
+ */
+static cairo_status_t
+_cairo_gl_surface_extract_image_data (cairo_image_surface_t *image,
+ int x, int y,
+ int width, int height,
+ void **output)
+{
+ int cpp = PIXMAN_FORMAT_BPP (image->pixman_format) / 8;
+ char *data = _cairo_malloc_ab (width * height, cpp);
+ char *dst = data;
+ unsigned char *src = image->data + y * image->stride + x * cpp;
+ int i;
+
+ if (unlikely (data == NULL))
+ return CAIRO_STATUS_NO_MEMORY;
+
+ for (i = 0; i < height; i++) {
+ memcpy (dst, src, width * cpp);
+ src += image->stride;
+ dst += width * cpp;
+ }
+
+ *output = data;
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+cairo_bool_t
+_cairo_gl_get_image_format_and_type (cairo_gl_flavor_t flavor,
+ pixman_format_code_t pixman_format,
+ GLenum *internal_format, GLenum *format,
+ GLenum *type, cairo_bool_t *has_alpha,
+ cairo_bool_t *needs_swap)
+{
+ if (flavor == CAIRO_GL_FLAVOR_DESKTOP)
+ return _cairo_gl_get_image_format_and_type_gl (pixman_format,
+ internal_format, format,
+ type, has_alpha,
+ needs_swap);
+ else
+ return _cairo_gl_get_image_format_and_type_gles2 (pixman_format,
+ internal_format, format,
+ type, has_alpha,
+ needs_swap);
+
+}
+
+cairo_bool_t
+_cairo_gl_operator_is_supported (cairo_operator_t op)
+{
+ return op < CAIRO_OPERATOR_SATURATE;
+}
+
+static void
+_cairo_gl_surface_embedded_operand_init (cairo_gl_surface_t *surface)
+{
+ cairo_gl_operand_t *operand = &surface->operand;
+ cairo_surface_attributes_t *attributes = &operand->texture.attributes;
+
+ memset (operand, 0, sizeof (cairo_gl_operand_t));
+
+ operand->type = CAIRO_GL_OPERAND_TEXTURE;
+ operand->texture.surface = surface;
+ operand->texture.tex = surface->tex;
+
+ if (_cairo_gl_device_requires_power_of_two_textures (surface->base.device)) {
+ cairo_matrix_init_identity (&attributes->matrix);
+ } else {
+ cairo_matrix_init_scale (&attributes->matrix,
+ 1.0 / surface->width,
+ 1.0 / surface->height);
+ }
+
+ attributes->extend = CAIRO_EXTEND_NONE;
+ attributes->filter = CAIRO_FILTER_NEAREST;
+}
+
+void
+_cairo_gl_surface_init (cairo_device_t *device,
+ cairo_gl_surface_t *surface,
+ cairo_content_t content,
+ int width, int height)
+{
+ assert (width > 0 && height > 0);
+
+ _cairo_surface_init (&surface->base,
+ &_cairo_gl_surface_backend,
+ device,
+ content);
+
+ surface->width = width;
+ surface->height = height;
+ surface->needs_update = FALSE;
+
+ _cairo_gl_surface_embedded_operand_init (surface);
+}
+
+static cairo_bool_t
+_cairo_gl_surface_size_valid_for_context (cairo_gl_context_t *ctx,
+ int width, int height)
+{
+ return width > 0 && height > 0 &&
+ width <= ctx->max_framebuffer_size &&
+ height <= ctx->max_framebuffer_size;
+}
+
+static cairo_bool_t
+_cairo_gl_surface_size_valid (cairo_gl_surface_t *surface,
+ int width, int height)
+{
+ cairo_gl_context_t *ctx = (cairo_gl_context_t *)surface->base.device;
+ return _cairo_gl_surface_size_valid_for_context (ctx, width, height);
+}
+
+static cairo_surface_t *
+_cairo_gl_surface_create_scratch_for_texture (cairo_gl_context_t *ctx,
+ cairo_content_t content,
+ GLuint tex,
+ int width,
+ int height)
+{
+ cairo_gl_surface_t *surface;
+
+ surface = calloc (1, sizeof (cairo_gl_surface_t));
+ if (unlikely (surface == NULL))
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
+
+ surface->tex = tex;
+ _cairo_gl_surface_init (&ctx->base, surface, content, width, height);
+
+ surface->supports_msaa = ctx->supports_msaa;
+ surface->supports_stencil = TRUE;
+
+ /* Create the texture used to store the surface's data. */
+ _cairo_gl_context_activate (ctx, CAIRO_GL_TEX_TEMP);
+ glBindTexture (ctx->tex_target, surface->tex);
+ glTexParameteri (ctx->tex_target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ glTexParameteri (ctx->tex_target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+ return &surface->base;
+}
+
+static cairo_surface_t *
+_create_scratch_internal (cairo_gl_context_t *ctx,
+ cairo_content_t content,
+ int width,
+ int height,
+ cairo_bool_t for_caching)
+{
+ cairo_gl_surface_t *surface;
+ GLenum format;
+ GLuint tex;
+
+ glGenTextures (1, &tex);
+ surface = (cairo_gl_surface_t *)
+ _cairo_gl_surface_create_scratch_for_texture (ctx, content,
+ tex, width, height);
+ if (unlikely (surface->base.status))
+ return &surface->base;
+
+ surface->owns_tex = TRUE;
+
+ /* adjust the texture size after setting our real extents */
+ if (width < 1)
+ width = 1;
+ if (height < 1)
+ height = 1;
+
+ switch (content) {
+ default:
+ ASSERT_NOT_REACHED;
+ case CAIRO_CONTENT_COLOR_ALPHA:
+ format = GL_RGBA;
+ break;
+ case CAIRO_CONTENT_ALPHA:
+ /* When using GL_ALPHA, compositing doesn't work properly, but for
+ * caching surfaces, we are just uploading pixel data, so it isn't
+ * an issue. */
+ if (for_caching)
+ format = GL_ALPHA;
+ else
+ format = GL_RGBA;
+ break;
+ case CAIRO_CONTENT_COLOR:
+ /* GL_RGB is almost what we want here -- sampling 1 alpha when
+ * texturing, using 1 as destination alpha factor in blending,
+ * etc. However, when filtering with GL_CLAMP_TO_BORDER, the
+ * alpha channel of the border color will also be clamped to
+ * 1, when we actually want the border color we explicitly
+ * specified. So, we have to store RGBA, and fill the alpha
+ * channel with 1 when blending.
+ */
+ format = GL_RGBA;
+ break;
+ }
+
+ glTexImage2D (ctx->tex_target, 0, format, width, height, 0,
+ format, GL_UNSIGNED_BYTE, NULL);
+
+ return &surface->base;
+}
+
+cairo_surface_t *
+_cairo_gl_surface_create_scratch (cairo_gl_context_t *ctx,
+ cairo_content_t content,
+ int width,
+ int height)
+{
+ return _create_scratch_internal (ctx, content, width, height, FALSE);
+}
+
+cairo_surface_t *
+_cairo_gl_surface_create_scratch_for_caching (cairo_gl_context_t *ctx,
+ cairo_content_t content,
+ int width,
+ int height)
+{
+ return _create_scratch_internal (ctx, content, width, height, TRUE);
+}
+
+static cairo_status_t
+_cairo_gl_surface_clear (cairo_gl_surface_t *surface,
+ const cairo_color_t *color)
+{
+ cairo_gl_context_t *ctx;
+ cairo_status_t status;
+ double r, g, b, a;
+
+ status = _cairo_gl_context_acquire (surface->base.device, &ctx);
+ if (unlikely (status))
+ return status;
+
+ _cairo_gl_context_set_destination (ctx, surface, surface->msaa_active);
+ if (surface->base.content & CAIRO_CONTENT_COLOR) {
+ r = color->red * color->alpha;
+ g = color->green * color->alpha;
+ b = color->blue * color->alpha;
+ } else {
+ r = g = b = 0;
+ }
+ if (surface->base.content & CAIRO_CONTENT_ALPHA) {
+ a = color->alpha;
+ } else {
+ a = 1.0;
+ }
+
+ glDisable (GL_SCISSOR_TEST);
+ glClearColor (r, g, b, a);
+ glClear (GL_COLOR_BUFFER_BIT);
+
+ if (a == 0)
+ surface->base.is_clear = TRUE;
+
+ return _cairo_gl_context_release (ctx, status);
+}
+
+static cairo_surface_t *
+_cairo_gl_surface_create_and_clear_scratch (cairo_gl_context_t *ctx,
+ cairo_content_t content,
+ int width,
+ int height)
+{
+ cairo_gl_surface_t *surface;
+ cairo_int_status_t status;
+
+ surface = (cairo_gl_surface_t *)
+ _cairo_gl_surface_create_scratch (ctx, content, width, height);
+ if (unlikely (surface->base.status))
+ return &surface->base;
+
+ /* Cairo surfaces start out initialized to transparent (black) */
+ status = _cairo_gl_surface_clear (surface, CAIRO_COLOR_TRANSPARENT);
+ if (unlikely (status)) {
+ cairo_surface_destroy (&surface->base);
+ return _cairo_surface_create_in_error (status);
+ }
+
+ return &surface->base;
+}
+
+cairo_surface_t *
+cairo_gl_surface_create (cairo_device_t *abstract_device,
+ cairo_content_t content,
+ int width,
+ int height)
+{
+ cairo_gl_context_t *ctx;
+ cairo_gl_surface_t *surface;
+ cairo_status_t status;
+
+ if (! CAIRO_CONTENT_VALID (content))
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_CONTENT));
+
+ if (abstract_device == NULL)
+ return _cairo_image_surface_create_with_content (content, width, height);
+
+ if (abstract_device->status)
+ return _cairo_surface_create_in_error (abstract_device->status);
+
+ if (abstract_device->backend->type != CAIRO_DEVICE_TYPE_GL)
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_SURFACE_TYPE_MISMATCH));
+
+ status = _cairo_gl_context_acquire (abstract_device, &ctx);
+ if (unlikely (status))
+ return _cairo_surface_create_in_error (status);
+
+ if (! _cairo_gl_surface_size_valid_for_context (ctx, width, height)) {
+ status = _cairo_gl_context_release (ctx, status);
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_SIZE));
+ }
+
+ surface = (cairo_gl_surface_t *)
+ _cairo_gl_surface_create_and_clear_scratch (ctx, content, width, height);
+ if (unlikely (surface->base.status)) {
+ status = _cairo_gl_context_release (ctx, surface->base.status);
+ cairo_surface_destroy (&surface->base);
+ return _cairo_surface_create_in_error (status);
+ }
+
+ status = _cairo_gl_context_release (ctx, status);
+ if (unlikely (status)) {
+ cairo_surface_destroy (&surface->base);
+ return _cairo_surface_create_in_error (status);
+ }
+
+ return &surface->base;
+}
+slim_hidden_def (cairo_gl_surface_create);
+
+/**
+ * cairo_gl_surface_create_for_texture:
+ * @content: type of content in the surface
+ * @tex: name of texture to use for storage of surface pixels
+ * @width: width of the surface, in pixels
+ * @height: height of the surface, in pixels
+ *
+ * Creates a GL surface for the specified texture with the specified
+ * content and dimensions. The texture must be kept around until the
+ * #cairo_surface_t is destroyed or cairo_surface_finish() is called
+ * on the surface. The initial contents of @tex will be used as the
+ * initial image contents; you must explicitly clear the buffer,
+ * using, for example, cairo_rectangle() and cairo_fill() if you want
+ * it cleared. The format of @tex should be compatible with @content,
+ * in the sense that it must have the color components required by
+ * @content.
+ *
+ * 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: TBD
+ **/
+cairo_surface_t *
+cairo_gl_surface_create_for_texture (cairo_device_t *abstract_device,
+ cairo_content_t content,
+ unsigned int tex,
+ int width,
+ int height)
+{
+ cairo_gl_context_t *ctx;
+ cairo_gl_surface_t *surface;
+ cairo_status_t status;
+
+ if (! CAIRO_CONTENT_VALID (content))
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_CONTENT));
+
+ if (abstract_device == NULL)
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NULL_POINTER));
+
+ if (abstract_device->status)
+ return _cairo_surface_create_in_error (abstract_device->status);
+
+ if (abstract_device->backend->type != CAIRO_DEVICE_TYPE_GL)
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_DEVICE_TYPE_MISMATCH));
+
+ status = _cairo_gl_context_acquire (abstract_device, &ctx);
+ if (unlikely (status))
+ return _cairo_surface_create_in_error (status);
+
+ if (! _cairo_gl_surface_size_valid_for_context (ctx, width, height)) {
+ status = _cairo_gl_context_release (ctx, status);
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_SIZE));
+ }
+
+ surface = (cairo_gl_surface_t *)
+ _cairo_gl_surface_create_scratch_for_texture (ctx, content,
+ tex, width, height);
+ status = _cairo_gl_context_release (ctx, status);
+
+ return &surface->base;
+}
+slim_hidden_def (cairo_gl_surface_create_for_texture);
+
+
+void
+cairo_gl_surface_set_size (cairo_surface_t *abstract_surface,
+ int width,
+ int height)
+{
+ cairo_gl_surface_t *surface = (cairo_gl_surface_t *) abstract_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_gl (abstract_surface) ||
+ _cairo_gl_surface_is_texture (surface)) {
+ _cairo_surface_set_error (abstract_surface,
+ _cairo_error (CAIRO_STATUS_SURFACE_TYPE_MISMATCH));
+ return;
+ }
+
+ if (surface->width != width || surface->height != height) {
+ surface->needs_update = TRUE;
+ surface->width = width;
+ surface->height = height;
+ }
+}
+
+int
+cairo_gl_surface_get_width (cairo_surface_t *abstract_surface)
+{
+ cairo_gl_surface_t *surface = (cairo_gl_surface_t *) abstract_surface;
+
+ if (! _cairo_surface_is_gl (abstract_surface))
+ return 0;
+
+ return surface->width;
+}
+
+int
+cairo_gl_surface_get_height (cairo_surface_t *abstract_surface)
+{
+ cairo_gl_surface_t *surface = (cairo_gl_surface_t *) abstract_surface;
+
+ if (! _cairo_surface_is_gl (abstract_surface))
+ return 0;
+
+ return surface->height;
+}
+
+void
+cairo_gl_surface_swapbuffers (cairo_surface_t *abstract_surface)
+{
+ cairo_gl_surface_t *surface = (cairo_gl_surface_t *) abstract_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_gl (abstract_surface)) {
+ _cairo_surface_set_error (abstract_surface,
+ CAIRO_STATUS_SURFACE_TYPE_MISMATCH);
+ return;
+ }
+
+ if (! _cairo_gl_surface_is_texture (surface)) {
+ cairo_gl_context_t *ctx;
+ cairo_status_t status;
+
+ status = _cairo_gl_context_acquire (surface->base.device, &ctx);
+ if (unlikely (status))
+ return;
+
+ /* For swapping on EGL, at least, we need a valid context/target. */
+ _cairo_gl_context_set_destination (ctx, surface, FALSE);
+ /* And in any case we should flush any pending operations. */
+ _cairo_gl_composite_flush (ctx);
+
+ ctx->swap_buffers (ctx, surface);
+
+ status = _cairo_gl_context_release (ctx, status);
+ if (status)
+ status = _cairo_surface_set_error (abstract_surface, status);
+ }
+}
+
+static cairo_surface_t *
+_cairo_gl_surface_create_similar (void *abstract_surface,
+ cairo_content_t content,
+ int width,
+ int height)
+{
+ cairo_surface_t *surface = abstract_surface;
+ cairo_gl_context_t *ctx;
+ cairo_status_t status;
+
+ if (! _cairo_gl_surface_size_valid (abstract_surface, width, height))
+ return _cairo_image_surface_create_with_content (content, width, height);
+
+ status = _cairo_gl_context_acquire (surface->device, &ctx);
+ if (unlikely (status))
+ return _cairo_surface_create_in_error (status);
+
+ surface = _cairo_gl_surface_create_and_clear_scratch (ctx, content, width, height);
+
+ status = _cairo_gl_context_release (ctx, status);
+ if (unlikely (status)) {
+ cairo_surface_destroy (surface);
+ return _cairo_surface_create_in_error (status);
+ }
+
+ return surface;
+}
+
+static cairo_int_status_t
+_cairo_gl_surface_fill_alpha_channel (cairo_gl_surface_t *dst,
+ cairo_gl_context_t *ctx,
+ int x, int y,
+ int width, int height)
+{
+ cairo_gl_composite_t setup;
+ cairo_status_t status;
+
+ _cairo_gl_composite_flush (ctx);
+ glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_TRUE);
+
+ status = _cairo_gl_composite_init (&setup, CAIRO_OPERATOR_SOURCE,
+ dst, FALSE);
+ if (unlikely (status))
+ goto CLEANUP;
+
+ _cairo_gl_composite_set_solid_source (&setup, CAIRO_COLOR_BLACK);
+
+ status = _cairo_gl_composite_begin (&setup, &ctx);
+ if (unlikely (status))
+ goto CLEANUP;
+
+ _cairo_gl_context_emit_rect (ctx, x, y, x + width, y + height);
+
+ status = _cairo_gl_context_release (ctx, status);
+
+ CLEANUP:
+ _cairo_gl_composite_fini (&setup);
+
+ _cairo_gl_composite_flush (ctx);
+ glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
+
+ return status;
+}
+
+cairo_status_t
+_cairo_gl_surface_draw_image (cairo_gl_surface_t *dst,
+ cairo_image_surface_t *src,
+ int src_x, int src_y,
+ int width, int height,
+ int dst_x, int dst_y,
+ cairo_bool_t force_flush)
+{
+ GLenum internal_format, format, type;
+ cairo_bool_t has_alpha, needs_swap;
+ cairo_image_surface_t *clone = NULL;
+ cairo_gl_context_t *ctx;
+ int cpp;
+ cairo_int_status_t status = CAIRO_INT_STATUS_SUCCESS;
+
+ status = _cairo_gl_context_acquire (dst->base.device, &ctx);
+ if (unlikely (status))
+ return status;
+
+ if (! _cairo_gl_get_image_format_and_type (ctx->gl_flavor,
+ src->pixman_format,
+ &internal_format,
+ &format,
+ &type,
+ &has_alpha,
+ &needs_swap))
+ {
+ cairo_bool_t is_supported;
+
+ clone = _cairo_image_surface_coerce (src);
+ if (unlikely (status = clone->base.status))
+ goto FAIL;
+
+ is_supported =
+ _cairo_gl_get_image_format_and_type (ctx->gl_flavor,
+ clone->pixman_format,
+ &internal_format,
+ &format,
+ &type,
+ &has_alpha,
+ &needs_swap);
+ assert (is_supported);
+ assert (!needs_swap);
+ src = clone;
+ }
+
+ cpp = PIXMAN_FORMAT_BPP (src->pixman_format) / 8;
+
+ if (force_flush) {
+ status = _cairo_gl_surface_flush (&dst->base, 0);
+ if (unlikely (status))
+ goto FAIL;
+ }
+
+ if (_cairo_gl_surface_is_texture (dst)) {
+ void *data_start = src->data + src_y * src->stride + src_x * cpp;
+ void *data_start_gles2 = NULL;
+
+ /*
+ * Due to GL_UNPACK_ROW_LENGTH missing in GLES2 we have to extract the
+ * image data ourselves in some cases. In particular, we must extract
+ * the pixels if:
+ * a. we don't want full-length lines or
+ * b. the row stride cannot be handled by GL itself using a 4 byte
+ * alignment constraint
+ */
+ if (src->stride < 0 ||
+ (ctx->gl_flavor == CAIRO_GL_FLAVOR_ES &&
+ (src->width * cpp < src->stride - 3 ||
+ width != src->width)))
+ {
+ glPixelStorei (GL_UNPACK_ALIGNMENT, 1);
+ status = _cairo_gl_surface_extract_image_data (src, src_x, src_y,
+ width, height,
+ &data_start_gles2);
+ if (unlikely (status))
+ goto FAIL;
+
+ data_start = data_start_gles2;
+ }
+ else
+ {
+ glPixelStorei (GL_UNPACK_ALIGNMENT, 4);
+ if (ctx->gl_flavor == CAIRO_GL_FLAVOR_DESKTOP)
+ glPixelStorei (GL_UNPACK_ROW_LENGTH, src->stride / cpp);
+ }
+
+ _cairo_gl_context_activate (ctx, CAIRO_GL_TEX_TEMP);
+ glBindTexture (ctx->tex_target, dst->tex);
+ glTexParameteri (ctx->tex_target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ glTexParameteri (ctx->tex_target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+ glTexSubImage2D (ctx->tex_target, 0,
+ dst_x, dst_y, width, height,
+ format, type, data_start);
+
+ free (data_start_gles2);
+
+ /* If we just treated some rgb-only data as rgba, then we have to
+ * go back and fix up the alpha channel where we filled in this
+ * texture data.
+ */
+ if (!has_alpha) {
+ _cairo_gl_surface_fill_alpha_channel (dst, ctx,
+ dst_x, dst_y,
+ width, height);
+ }
+ } else {
+ cairo_surface_t *tmp;
+
+ tmp = _cairo_gl_surface_create_scratch (ctx,
+ dst->base.content,
+ width, height);
+ if (unlikely (tmp->status))
+ goto FAIL;
+
+ status = _cairo_gl_surface_draw_image ((cairo_gl_surface_t *) tmp,
+ src,
+ src_x, src_y,
+ width, height,
+ 0, 0, force_flush);
+ if (status == CAIRO_INT_STATUS_SUCCESS) {
+ cairo_surface_pattern_t tmp_pattern;
+ cairo_rectangle_int_t r;
+ cairo_clip_t *clip;
+
+ _cairo_pattern_init_for_surface (&tmp_pattern, tmp);
+ cairo_matrix_init_translate (&tmp_pattern.base.matrix,
+ -dst_x, -dst_y);
+ tmp_pattern.base.filter = CAIRO_FILTER_NEAREST;
+ tmp_pattern.base.extend = CAIRO_EXTEND_NONE;
+
+ r.x = dst_x;
+ r.y = dst_y;
+ r.width = width;
+ r.height = height;
+ clip = _cairo_clip_intersect_rectangle (NULL, &r);
+ status = _cairo_surface_paint (&dst->base,
+ CAIRO_OPERATOR_SOURCE,
+ &tmp_pattern.base,
+ clip);
+ _cairo_clip_destroy (clip);
+ _cairo_pattern_fini (&tmp_pattern.base);
+ }
+
+ cairo_surface_destroy (tmp);
+ }
+
+FAIL:
+ status = _cairo_gl_context_release (ctx, status);
+
+ if (clone)
+ cairo_surface_destroy (&clone->base);
+
+ return status;
+}
+
+static int _cairo_gl_surface_flavor (cairo_gl_surface_t *surface)
+{
+ cairo_gl_context_t *ctx = (cairo_gl_context_t *)surface->base.device;
+ return ctx->gl_flavor;
+}
+
+static cairo_status_t
+_cairo_gl_surface_finish (void *abstract_surface)
+{
+ cairo_gl_surface_t *surface = abstract_surface;
+ cairo_status_t status;
+ cairo_gl_context_t *ctx;
+
+ status = _cairo_gl_context_acquire (surface->base.device, &ctx);
+ if (unlikely (status))
+ return status;
+
+ if (ctx->operands[CAIRO_GL_TEX_SOURCE].type == CAIRO_GL_OPERAND_TEXTURE &&
+ ctx->operands[CAIRO_GL_TEX_SOURCE].texture.surface == surface)
+ _cairo_gl_context_destroy_operand (ctx, CAIRO_GL_TEX_SOURCE);
+ if (ctx->operands[CAIRO_GL_TEX_MASK].type == CAIRO_GL_OPERAND_TEXTURE &&
+ ctx->operands[CAIRO_GL_TEX_MASK].texture.surface == surface)
+ _cairo_gl_context_destroy_operand (ctx, CAIRO_GL_TEX_MASK);
+ if (ctx->current_target == surface)
+ ctx->current_target = NULL;
+
+ if (surface->fb)
+ ctx->dispatch.DeleteFramebuffers (1, &surface->fb);
+ if (surface->depth_stencil)
+ ctx->dispatch.DeleteRenderbuffers (1, &surface->depth_stencil);
+ if (surface->owns_tex)
+ glDeleteTextures (1, &surface->tex);
+
+ if (surface->msaa_depth_stencil)
+ ctx->dispatch.DeleteRenderbuffers (1, &surface->msaa_depth_stencil);
+
+#if CAIRO_HAS_GL_SURFACE
+ if (surface->msaa_fb)
+ ctx->dispatch.DeleteFramebuffers (1, &surface->msaa_fb);
+ if (surface->msaa_rb)
+ ctx->dispatch.DeleteRenderbuffers (1, &surface->msaa_rb);
+#endif
+
+ _cairo_clip_destroy (surface->clip_on_stencil_buffer);
+
+ return _cairo_gl_context_release (ctx, status);
+}
+
+static cairo_image_surface_t *
+_cairo_gl_surface_map_to_image (void *abstract_surface,
+ const cairo_rectangle_int_t *extents)
+{
+ cairo_gl_surface_t *surface = abstract_surface;
+ cairo_image_surface_t *image;
+ cairo_gl_context_t *ctx;
+ GLenum format, type;
+ pixman_format_code_t pixman_format;
+ unsigned int cpp;
+ cairo_bool_t flipped, mesa_invert;
+ cairo_status_t status;
+ int y;
+
+ status = _cairo_gl_context_acquire (surface->base.device, &ctx);
+ if (unlikely (status)) {
+ return _cairo_image_surface_create_in_error (status);
+ }
+
+ /* Want to use a switch statement here but the compiler gets whiny. */
+ if (surface->base.content == CAIRO_CONTENT_COLOR_ALPHA) {
+ format = GL_BGRA;
+ pixman_format = PIXMAN_a8r8g8b8;
+ type = GL_UNSIGNED_INT_8_8_8_8_REV;
+ cpp = 4;
+ } else if (surface->base.content == CAIRO_CONTENT_COLOR) {
+ format = GL_BGRA;
+ pixman_format = PIXMAN_x8r8g8b8;
+ type = GL_UNSIGNED_INT_8_8_8_8_REV;
+ cpp = 4;
+ } else if (surface->base.content == CAIRO_CONTENT_ALPHA) {
+ format = GL_ALPHA;
+ pixman_format = PIXMAN_a8;
+ type = GL_UNSIGNED_BYTE;
+ cpp = 1;
+ } else {
+ ASSERT_NOT_REACHED;
+ return NULL;
+ }
+
+ if (_cairo_gl_surface_flavor (surface) == CAIRO_GL_FLAVOR_ES) {
+ /* If only RGBA is supported, we must download data in a compatible
+ * format. This means that pixman will convert the data on the CPU when
+ * interacting with other image surfaces. For ALPHA, GLES2 does not
+ * support GL_PACK_ROW_LENGTH anyway, and this makes sure that the
+ * pixman image that is created has row_stride = row_width * bpp. */
+ if (surface->base.content == CAIRO_CONTENT_ALPHA || !ctx->can_read_bgra) {
+ cairo_bool_t little_endian = _cairo_is_little_endian ();
+ format = GL_RGBA;
+
+ if (surface->base.content == CAIRO_CONTENT_COLOR) {
+ pixman_format = little_endian ?
+ PIXMAN_x8b8g8r8 : PIXMAN_r8g8b8x8;
+ } else {
+ pixman_format = little_endian ?
+ PIXMAN_a8b8g8r8 : PIXMAN_r8g8b8a8;
+ }
+ }
+
+ /* GLES2 only supports GL_UNSIGNED_BYTE. */
+ type = GL_UNSIGNED_BYTE;
+ cpp = 4;
+ }
+
+ image = (cairo_image_surface_t*)
+ _cairo_image_surface_create_with_pixman_format (NULL,
+ pixman_format,
+ extents->width,
+ extents->height,
+ -1);
+ if (unlikely (image->base.status)) {
+ status = _cairo_gl_context_release (ctx, status);
+ return image;
+ }
+
+ cairo_surface_set_device_offset (&image->base, -extents->x, -extents->y);
+
+ /* If the original surface has not been modified or
+ * is clear, we can avoid downloading data. */
+ if (surface->base.is_clear || surface->base.serial == 0) {
+ status = _cairo_gl_context_release (ctx, status);
+ return image;
+ }
+
+ /* This is inefficient, as we'd rather just read the thing without making
+ * it the destination. But then, this is the fallback path, so let's not
+ * fall back instead.
+ */
+ _cairo_gl_composite_flush (ctx);
+ _cairo_gl_context_set_destination (ctx, surface, FALSE);
+
+ flipped = ! _cairo_gl_surface_is_texture (surface);
+ mesa_invert = flipped && ctx->has_mesa_pack_invert;
+
+ glPixelStorei (GL_PACK_ALIGNMENT, 4);
+ if (ctx->gl_flavor == CAIRO_GL_FLAVOR_DESKTOP)
+ glPixelStorei (GL_PACK_ROW_LENGTH, image->stride / cpp);
+ if (mesa_invert)
+ glPixelStorei (GL_PACK_INVERT_MESA, 1);
+
+ y = extents->y;
+ if (flipped)
+ y = surface->height - extents->y - extents->height;
+
+ glReadPixels (extents->x, y,
+ extents->width, extents->height,
+ format, type, image->data);
+ if (mesa_invert)
+ glPixelStorei (GL_PACK_INVERT_MESA, 0);
+
+ status = _cairo_gl_context_release (ctx, status);
+ if (unlikely (status)) {
+ cairo_surface_destroy (&image->base);
+ return _cairo_image_surface_create_in_error (status);
+ }
+
+ /* We must invert the image manualy if we lack GL_MESA_pack_invert */
+ if (flipped && ! mesa_invert) {
+ uint8_t stack[1024], *row = stack;
+ uint8_t *top = image->data;
+ uint8_t *bot = image->data + (image->height-1)*image->stride;
+
+ if (image->stride > (int)sizeof(stack)) {
+ row = malloc (image->stride);
+ if (unlikely (row == NULL)) {
+ cairo_surface_destroy (&image->base);
+ return _cairo_image_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
+ }
+ }
+
+ while (top < bot) {
+ memcpy (row, top, image->stride);
+ memcpy (top, bot, image->stride);
+ memcpy (bot, row, image->stride);
+ top += image->stride;
+ bot -= image->stride;
+ }
+
+ if (row != stack)
+ free(row);
+ }
+
+ image->base.is_clear = FALSE;
+ return image;
+}
+
+static cairo_surface_t *
+_cairo_gl_surface_source (void *abstract_surface,
+ cairo_rectangle_int_t *extents)
+{
+ cairo_gl_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_gl_surface_acquire_source_image (void *abstract_surface,
+ cairo_image_surface_t **image_out,
+ void **image_extra)
+{
+ cairo_gl_surface_t *surface = abstract_surface;
+ cairo_rectangle_int_t extents;
+
+ *image_extra = NULL;
+
+ extents.x = extents.y = 0;
+ extents.width = surface->width;
+ extents.height = surface->height;
+
+ *image_out = (cairo_image_surface_t *)
+ _cairo_gl_surface_map_to_image (surface, &extents);
+ return (*image_out)->base.status;
+}
+
+static void
+_cairo_gl_surface_release_source_image (void *abstract_surface,
+ cairo_image_surface_t *image,
+ void *image_extra)
+{
+ cairo_surface_destroy (&image->base);
+}
+
+static cairo_int_status_t
+_cairo_gl_surface_unmap_image (void *abstract_surface,
+ cairo_image_surface_t *image)
+{
+ cairo_int_status_t status;
+
+ status = _cairo_gl_surface_draw_image (abstract_surface, image,
+ 0, 0,
+ image->width, image->height,
+ image->base.device_transform_inverse.x0,
+ image->base.device_transform_inverse.y0,
+ TRUE);
+
+ cairo_surface_finish (&image->base);
+ cairo_surface_destroy (&image->base);
+
+ return status;
+}
+
+static cairo_bool_t
+_cairo_gl_surface_get_extents (void *abstract_surface,
+ cairo_rectangle_int_t *rectangle)
+{
+ cairo_gl_surface_t *surface = abstract_surface;
+
+ rectangle->x = 0;
+ rectangle->y = 0;
+ rectangle->width = surface->width;
+ rectangle->height = surface->height;
+
+ return TRUE;
+}
+
+static cairo_status_t
+_cairo_gl_surface_flush (void *abstract_surface, unsigned flags)
+{
+ cairo_gl_surface_t *surface = abstract_surface;
+ cairo_status_t status;
+ cairo_gl_context_t *ctx;
+
+ if (flags)
+ return CAIRO_STATUS_SUCCESS;
+
+ status = _cairo_gl_context_acquire (surface->base.device, &ctx);
+ if (unlikely (status))
+ return status;
+
+ if ((ctx->operands[CAIRO_GL_TEX_SOURCE].type == CAIRO_GL_OPERAND_TEXTURE &&
+ ctx->operands[CAIRO_GL_TEX_SOURCE].texture.surface == surface) ||
+ (ctx->operands[CAIRO_GL_TEX_MASK].type == CAIRO_GL_OPERAND_TEXTURE &&
+ ctx->operands[CAIRO_GL_TEX_MASK].texture.surface == surface) ||
+ (ctx->current_target == surface))
+ _cairo_gl_composite_flush (ctx);
+
+ status = _cairo_gl_surface_resolve_multisampling (surface);
+
+ return _cairo_gl_context_release (ctx, status);
+}
+
+cairo_int_status_t
+_cairo_gl_surface_resolve_multisampling (cairo_gl_surface_t *surface)
+{
+ cairo_gl_context_t *ctx;
+ cairo_int_status_t status;
+
+ if (! surface->msaa_active)
+ return CAIRO_INT_STATUS_SUCCESS;
+
+ if (surface->base.device == NULL)
+ return CAIRO_INT_STATUS_SUCCESS;
+
+ /* GLES surfaces do not need explicit resolution. */
+ if (((cairo_gl_context_t *) surface->base.device)->gl_flavor == CAIRO_GL_FLAVOR_ES)
+ return CAIRO_INT_STATUS_SUCCESS;
+
+ if (! _cairo_gl_surface_is_texture (surface))
+ return CAIRO_INT_STATUS_SUCCESS;
+
+ status = _cairo_gl_context_acquire (surface->base.device, &ctx);
+ if (unlikely (status))
+ return status;
+
+ ctx->current_target = surface;
+
+#if CAIRO_HAS_GL_SURFACE
+ _cairo_gl_context_bind_framebuffer (ctx, surface, FALSE);
+#endif
+
+ status = _cairo_gl_context_release (ctx, status);
+ return status;
+}
+
+static const cairo_compositor_t *
+get_compositor (cairo_gl_surface_t *surface)
+{
+ cairo_gl_context_t *ctx = (cairo_gl_context_t *)surface->base.device;
+ return ctx->compositor;
+}
+
+static cairo_int_status_t
+_cairo_gl_surface_paint (void *surface,
+ cairo_operator_t op,
+ const cairo_pattern_t *source,
+ const cairo_clip_t *clip)
+{
+ /* simplify the common case of clearing the surface */
+ if (clip == NULL) {
+ if (op == CAIRO_OPERATOR_CLEAR)
+ return _cairo_gl_surface_clear (surface, CAIRO_COLOR_TRANSPARENT);
+ else if (source->type == CAIRO_PATTERN_TYPE_SOLID &&
+ (op == CAIRO_OPERATOR_SOURCE ||
+ (op == CAIRO_OPERATOR_OVER && _cairo_pattern_is_opaque_solid (source)))) {
+ return _cairo_gl_surface_clear (surface,
+ &((cairo_solid_pattern_t *) source)->color);
+ }
+ }
+
+ return _cairo_compositor_paint (get_compositor (surface), surface,
+ op, source, clip);
+}
+
+static cairo_int_status_t
+_cairo_gl_surface_mask (void *surface,
+ cairo_operator_t op,
+ const cairo_pattern_t *source,
+ const cairo_pattern_t *mask,
+ const cairo_clip_t *clip)
+{
+ return _cairo_compositor_mask (get_compositor (surface), surface,
+ op, source, mask, clip);
+}
+
+static cairo_int_status_t
+_cairo_gl_surface_stroke (void *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)
+{
+ return _cairo_compositor_stroke (get_compositor (surface), surface,
+ op, source, path, style,
+ ctm, ctm_inverse, tolerance, antialias,
+ clip);
+}
+
+static cairo_int_status_t
+_cairo_gl_surface_fill (void *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)
+{
+ return _cairo_compositor_fill (get_compositor (surface), surface,
+ op, source, path,
+ fill_rule, tolerance, antialias,
+ clip);
+}
+
+static cairo_int_status_t
+_cairo_gl_surface_glyphs (void *surface,
+ cairo_operator_t op,
+ const cairo_pattern_t *source,
+ cairo_glyph_t *glyphs,
+ int num_glyphs,
+ cairo_scaled_font_t *font,
+ const cairo_clip_t *clip)
+{
+ return _cairo_compositor_glyphs (get_compositor (surface), surface,
+ op, source, glyphs, num_glyphs, font,
+ clip);
+}
+
+static const cairo_surface_backend_t _cairo_gl_surface_backend = {
+ CAIRO_SURFACE_TYPE_GL,
+ _cairo_gl_surface_finish,
+ _cairo_default_context_create,
+
+ _cairo_gl_surface_create_similar,
+ NULL, /* similar image */
+ _cairo_gl_surface_map_to_image,
+ _cairo_gl_surface_unmap_image,
+
+ _cairo_gl_surface_source,
+ _cairo_gl_surface_acquire_source_image,
+ _cairo_gl_surface_release_source_image,
+ NULL, /* snapshot */
+
+ NULL, /* copy_page */
+ NULL, /* show_page */
+
+ _cairo_gl_surface_get_extents,
+ _cairo_image_surface_get_font_options,
+
+ _cairo_gl_surface_flush,
+ NULL, /* mark_dirty_rectangle */
+
+ _cairo_gl_surface_paint,
+ _cairo_gl_surface_mask,
+ _cairo_gl_surface_stroke,
+ _cairo_gl_surface_fill,
+ NULL, /* fill/stroke */
+ _cairo_gl_surface_glyphs,
+};