diff options
Diffstat (limited to 'libs/cairo-1.16.0/src/cairo-surface.c')
| -rw-r--r-- | libs/cairo-1.16.0/src/cairo-surface.c | 3081 |
1 files changed, 0 insertions, 3081 deletions
diff --git a/libs/cairo-1.16.0/src/cairo-surface.c b/libs/cairo-1.16.0/src/cairo-surface.c deleted file mode 100644 index 596ca25..0000000 --- a/libs/cairo-1.16.0/src/cairo-surface.c +++ /dev/null @@ -1,3081 +0,0 @@ -/* -*- Mode: c; tab-width: 8; c-basic-offset: 4; indent-tabs-mode: t; -*- */ -/* cairo - a vector graphics library with display and print output - * - * Copyright © 2002 University of Southern California - * 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 University of Southern - * California. - * - * Contributor(s): - * Carl D. Worth <cworth@cworth.org> - */ - -#include "cairoint.h" - -#include "cairo-array-private.h" -#include "cairo-clip-inline.h" -#include "cairo-clip-private.h" -#include "cairo-damage-private.h" -#include "cairo-device-private.h" -#include "cairo-error-private.h" -#include "cairo-list-inline.h" -#include "cairo-image-surface-inline.h" -#include "cairo-recording-surface-private.h" -#include "cairo-region-private.h" -#include "cairo-surface-inline.h" -#include "cairo-tee-surface-private.h" - -/** - * SECTION:cairo-surface - * @Title: cairo_surface_t - * @Short_Description: Base class for surfaces - * @See_Also: #cairo_t, #cairo_pattern_t - * - * #cairo_surface_t is the abstract type representing all different drawing - * targets that cairo can render to. The actual drawings are - * performed using a cairo <firstterm>context</firstterm>. - * - * A cairo surface is created by using <firstterm>backend</firstterm>-specific - * constructors, typically of the form - * <function>cairo_<emphasis>backend</emphasis>_surface_create(<!-- -->)</function>. - * - * Most surface types allow accessing the surface without using Cairo - * functions. If you do this, keep in mind that it is mandatory that you call - * cairo_surface_flush() before reading from or writing to the surface and that - * you must use cairo_surface_mark_dirty() after modifying it. - * <example> - * <title>Directly modifying an image surface</title> - * <programlisting> - * void - * modify_image_surface (cairo_surface_t *surface) - * { - * unsigned char *data; - * int width, height, stride; - * - * // flush to ensure all writing to the image was done - * cairo_surface_flush (surface); - * - * // modify the image - * data = cairo_image_surface_get_data (surface); - * width = cairo_image_surface_get_width (surface); - * height = cairo_image_surface_get_height (surface); - * stride = cairo_image_surface_get_stride (surface); - * modify_image_data (data, width, height, stride); - * - * // mark the image dirty so Cairo clears its caches. - * cairo_surface_mark_dirty (surface); - * } - * </programlisting> - * </example> - * Note that for other surface types it might be necessary to acquire the - * surface's device first. See cairo_device_acquire() for a discussion of - * devices. - **/ - -#define DEFINE_NIL_SURFACE(status, name) \ -const cairo_surface_t name = { \ - NULL, /* backend */ \ - NULL, /* device */ \ - CAIRO_SURFACE_TYPE_IMAGE, /* type */ \ - CAIRO_CONTENT_COLOR, /* content */ \ - CAIRO_REFERENCE_COUNT_INVALID, /* ref_count */ \ - status, /* status */ \ - 0, /* unique id */ \ - 0, /* serial */ \ - NULL, /* damage */ \ - FALSE, /* _finishing */ \ - FALSE, /* finished */ \ - TRUE, /* is_clear */ \ - FALSE, /* has_font_options */ \ - FALSE, /* owns_device */ \ - FALSE, /* is_vector */ \ - { 0, 0, 0, NULL, }, /* user_data */ \ - { 0, 0, 0, NULL, }, /* mime_data */ \ - { 1.0, 0.0, 0.0, 1.0, 0.0, 0.0 }, /* device_transform */ \ - { 1.0, 0.0, 0.0, 1.0, 0.0, 0.0 }, /* device_transform_inverse */ \ - { NULL, NULL }, /* device_transform_observers */ \ - 0.0, /* x_resolution */ \ - 0.0, /* y_resolution */ \ - 0.0, /* x_fallback_resolution */ \ - 0.0, /* y_fallback_resolution */ \ - NULL, /* snapshot_of */ \ - NULL, /* snapshot_detach */ \ - { NULL, NULL }, /* snapshots */ \ - { NULL, NULL }, /* snapshot */ \ - { CAIRO_ANTIALIAS_DEFAULT, /* antialias */ \ - CAIRO_SUBPIXEL_ORDER_DEFAULT, /* subpixel_order */ \ - CAIRO_LCD_FILTER_DEFAULT, /* lcd_filter */ \ - CAIRO_HINT_STYLE_DEFAULT, /* hint_style */ \ - CAIRO_HINT_METRICS_DEFAULT, /* hint_metrics */ \ - CAIRO_ROUND_GLYPH_POS_DEFAULT /* round_glyph_positions */ \ - } /* font_options */ \ -} - -/* XXX error object! */ - -static DEFINE_NIL_SURFACE(CAIRO_STATUS_NO_MEMORY, _cairo_surface_nil); -static DEFINE_NIL_SURFACE(CAIRO_STATUS_SURFACE_TYPE_MISMATCH, _cairo_surface_nil_surface_type_mismatch); -static DEFINE_NIL_SURFACE(CAIRO_STATUS_INVALID_STATUS, _cairo_surface_nil_invalid_status); -static DEFINE_NIL_SURFACE(CAIRO_STATUS_INVALID_CONTENT, _cairo_surface_nil_invalid_content); -static DEFINE_NIL_SURFACE(CAIRO_STATUS_INVALID_FORMAT, _cairo_surface_nil_invalid_format); -static DEFINE_NIL_SURFACE(CAIRO_STATUS_INVALID_VISUAL, _cairo_surface_nil_invalid_visual); -static DEFINE_NIL_SURFACE(CAIRO_STATUS_FILE_NOT_FOUND, _cairo_surface_nil_file_not_found); -static DEFINE_NIL_SURFACE(CAIRO_STATUS_TEMP_FILE_ERROR, _cairo_surface_nil_temp_file_error); -static DEFINE_NIL_SURFACE(CAIRO_STATUS_READ_ERROR, _cairo_surface_nil_read_error); -static DEFINE_NIL_SURFACE(CAIRO_STATUS_WRITE_ERROR, _cairo_surface_nil_write_error); -static DEFINE_NIL_SURFACE(CAIRO_STATUS_INVALID_STRIDE, _cairo_surface_nil_invalid_stride); -static DEFINE_NIL_SURFACE(CAIRO_STATUS_INVALID_SIZE, _cairo_surface_nil_invalid_size); -static DEFINE_NIL_SURFACE(CAIRO_STATUS_DEVICE_TYPE_MISMATCH, _cairo_surface_nil_device_type_mismatch); -static DEFINE_NIL_SURFACE(CAIRO_STATUS_DEVICE_ERROR, _cairo_surface_nil_device_error); - -static DEFINE_NIL_SURFACE(CAIRO_INT_STATUS_UNSUPPORTED, _cairo_surface_nil_unsupported); -static DEFINE_NIL_SURFACE(CAIRO_INT_STATUS_NOTHING_TO_DO, _cairo_surface_nil_nothing_to_do); - -static void _cairo_surface_finish_snapshots (cairo_surface_t *surface); -static void _cairo_surface_finish (cairo_surface_t *surface); - -/** - * _cairo_surface_set_error: - * @surface: a surface - * @status: a status value indicating an error - * - * Atomically sets surface->status to @status and calls _cairo_error; - * Does nothing if status is %CAIRO_STATUS_SUCCESS or any of the internal - * status values. - * - * All assignments of an error status to surface->status should happen - * through _cairo_surface_set_error(). Note that due to the nature of - * the atomic operation, it is not safe to call this function on the - * nil objects. - * - * The purpose of this function is to allow the user to set a - * breakpoint in _cairo_error() to generate a stack trace for when the - * user causes cairo to detect an error. - * - * Return value: the error status. - **/ -cairo_int_status_t -_cairo_surface_set_error (cairo_surface_t *surface, - cairo_int_status_t status) -{ - /* NOTHING_TO_DO is magic. We use it to break out of the inner-most - * surface function, but anything higher just sees "success". - */ - if (status == CAIRO_INT_STATUS_NOTHING_TO_DO) - status = CAIRO_INT_STATUS_SUCCESS; - - if (status == CAIRO_INT_STATUS_SUCCESS || - status >= (int)CAIRO_INT_STATUS_LAST_STATUS) - return status; - - /* Don't overwrite an existing error. This preserves the first - * error, which is the most significant. */ - _cairo_status_set_error (&surface->status, (cairo_status_t)status); - - return _cairo_error (status); -} - -/** - * cairo_surface_get_type: - * @surface: a #cairo_surface_t - * - * This function returns the type of the backend used to create - * a surface. See #cairo_surface_type_t for available types. - * - * Return value: The type of @surface. - * - * Since: 1.2 - **/ -cairo_surface_type_t -cairo_surface_get_type (cairo_surface_t *surface) -{ - /* We don't use surface->backend->type here so that some of the - * special "wrapper" surfaces such as cairo_paginated_surface_t - * can override surface->type with the type of the "child" - * surface. */ - return surface->type; -} - -/** - * cairo_surface_get_content: - * @surface: a #cairo_surface_t - * - * This function returns the content type of @surface which indicates - * whether the surface contains color and/or alpha information. See - * #cairo_content_t. - * - * Return value: The content type of @surface. - * - * Since: 1.2 - **/ -cairo_content_t -cairo_surface_get_content (cairo_surface_t *surface) -{ - return surface->content; -} - -/** - * cairo_surface_status: - * @surface: a #cairo_surface_t - * - * Checks whether an error has previously occurred for this - * surface. - * - * Return value: %CAIRO_STATUS_SUCCESS, %CAIRO_STATUS_NULL_POINTER, - * %CAIRO_STATUS_NO_MEMORY, %CAIRO_STATUS_READ_ERROR, - * %CAIRO_STATUS_INVALID_CONTENT, %CAIRO_STATUS_INVALID_FORMAT, or - * %CAIRO_STATUS_INVALID_VISUAL. - * - * Since: 1.0 - **/ -cairo_status_t -cairo_surface_status (cairo_surface_t *surface) -{ - return surface->status; -} -slim_hidden_def (cairo_surface_status); - -static unsigned int -_cairo_surface_allocate_unique_id (void) -{ - static cairo_atomic_int_t unique_id; - -#if CAIRO_NO_MUTEX - if (++unique_id == 0) - unique_id = 1; - return unique_id; -#else - cairo_atomic_int_t old, id; - - do { - old = _cairo_atomic_uint_get (&unique_id); - id = old + 1; - if (id == 0) - id = 1; - } while (! _cairo_atomic_uint_cmpxchg (&unique_id, old, id)); - - return id; -#endif -} - -/** - * cairo_surface_get_device: - * @surface: a #cairo_surface_t - * - * This function returns the device for a @surface. - * See #cairo_device_t. - * - * Return value: The device for @surface or %NULL if the surface does - * not have an associated device. - * - * Since: 1.10 - **/ -cairo_device_t * -cairo_surface_get_device (cairo_surface_t *surface) -{ - if (unlikely (surface->status)) - return _cairo_device_create_in_error (surface->status); - - return surface->device; -} - -static cairo_bool_t -_cairo_surface_has_snapshots (cairo_surface_t *surface) -{ - return ! cairo_list_is_empty (&surface->snapshots); -} - -static cairo_bool_t -_cairo_surface_has_mime_data (cairo_surface_t *surface) -{ - return surface->mime_data.num_elements != 0; -} - -static void -_cairo_surface_detach_mime_data (cairo_surface_t *surface) -{ - if (! _cairo_surface_has_mime_data (surface)) - return; - - _cairo_user_data_array_fini (&surface->mime_data); - _cairo_user_data_array_init (&surface->mime_data); -} - -static void -_cairo_surface_detach_snapshots (cairo_surface_t *surface) -{ - while (_cairo_surface_has_snapshots (surface)) { - _cairo_surface_detach_snapshot (cairo_list_first_entry (&surface->snapshots, - cairo_surface_t, - snapshot)); - } -} - -void -_cairo_surface_detach_snapshot (cairo_surface_t *snapshot) -{ - assert (snapshot->snapshot_of != NULL); - - snapshot->snapshot_of = NULL; - cairo_list_del (&snapshot->snapshot); - - if (snapshot->snapshot_detach != NULL) - snapshot->snapshot_detach (snapshot); - - cairo_surface_destroy (snapshot); -} - -void -_cairo_surface_attach_snapshot (cairo_surface_t *surface, - cairo_surface_t *snapshot, - cairo_surface_func_t detach_func) -{ - assert (surface != snapshot); - assert (snapshot->snapshot_of != surface); - - cairo_surface_reference (snapshot); - - if (snapshot->snapshot_of != NULL) - _cairo_surface_detach_snapshot (snapshot); - - snapshot->snapshot_of = surface; - snapshot->snapshot_detach = detach_func; - - cairo_list_add (&snapshot->snapshot, &surface->snapshots); - - assert (_cairo_surface_has_snapshot (surface, snapshot->backend) == snapshot); -} - -cairo_surface_t * -_cairo_surface_has_snapshot (cairo_surface_t *surface, - const cairo_surface_backend_t *backend) -{ - cairo_surface_t *snapshot; - - cairo_list_foreach_entry (snapshot, cairo_surface_t, - &surface->snapshots, snapshot) - { - if (snapshot->backend == backend) - return snapshot; - } - - return NULL; -} - -cairo_status_t -_cairo_surface_begin_modification (cairo_surface_t *surface) -{ - assert (surface->status == CAIRO_STATUS_SUCCESS); - assert (! surface->finished); - - return _cairo_surface_flush (surface, 1); -} - -void -_cairo_surface_init (cairo_surface_t *surface, - const cairo_surface_backend_t *backend, - cairo_device_t *device, - cairo_content_t content, - cairo_bool_t is_vector) -{ - CAIRO_MUTEX_INITIALIZE (); - - surface->backend = backend; - surface->device = cairo_device_reference (device); - surface->content = content; - surface->type = backend->type; - surface->is_vector = is_vector; - - CAIRO_REFERENCE_COUNT_INIT (&surface->ref_count, 1); - surface->status = CAIRO_STATUS_SUCCESS; - surface->unique_id = _cairo_surface_allocate_unique_id (); - surface->finished = FALSE; - surface->_finishing = FALSE; - surface->is_clear = FALSE; - surface->serial = 0; - surface->damage = NULL; - surface->owns_device = (device != NULL); - - _cairo_user_data_array_init (&surface->user_data); - _cairo_user_data_array_init (&surface->mime_data); - - cairo_matrix_init_identity (&surface->device_transform); - cairo_matrix_init_identity (&surface->device_transform_inverse); - cairo_list_init (&surface->device_transform_observers); - - surface->x_resolution = CAIRO_SURFACE_RESOLUTION_DEFAULT; - surface->y_resolution = CAIRO_SURFACE_RESOLUTION_DEFAULT; - - surface->x_fallback_resolution = CAIRO_SURFACE_FALLBACK_RESOLUTION_DEFAULT; - surface->y_fallback_resolution = CAIRO_SURFACE_FALLBACK_RESOLUTION_DEFAULT; - - cairo_list_init (&surface->snapshots); - surface->snapshot_of = NULL; - - surface->has_font_options = FALSE; -} - -static void -_cairo_surface_copy_similar_properties (cairo_surface_t *surface, - cairo_surface_t *other) -{ - if (other->has_font_options || other->backend != surface->backend) { - cairo_font_options_t options; - - cairo_surface_get_font_options (other, &options); - _cairo_surface_set_font_options (surface, &options); - } - - cairo_surface_set_fallback_resolution (surface, - other->x_fallback_resolution, - other->y_fallback_resolution); -} - -/** - * cairo_surface_create_similar: - * @other: an existing surface used to select the backend of the new surface - * @content: the content for the new surface - * @width: width of the new surface, (in device-space units) - * @height: height of the new surface (in device-space units) - * - * Create a new surface that is as compatible as possible with an - * existing surface. For example the new surface will have the same - * device scale, fallback resolution and font options as - * @other. Generally, the new surface will also use the same backend - * as @other, unless that is not possible for some reason. The type of - * the returned surface may be examined with - * cairo_surface_get_type(). - * - * Initially the surface contents are all 0 (transparent if contents - * have transparency, black otherwise.) - * - * Use cairo_surface_create_similar_image() if you need an image surface - * which can be painted quickly to the target surface. - * - * Return value: a pointer to the newly allocated 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 @other is already in an error state - * or any other error occurs. - * - * Since: 1.0 - **/ -cairo_surface_t * -cairo_surface_create_similar (cairo_surface_t *other, - cairo_content_t content, - int width, - int height) -{ - cairo_surface_t *surface; - cairo_status_t status; - cairo_solid_pattern_t pattern; - - if (unlikely (other->status)) - return _cairo_surface_create_in_error (other->status); - if (unlikely (other->finished)) - return _cairo_surface_create_in_error (CAIRO_STATUS_SURFACE_FINISHED); - if (unlikely (width < 0 || height < 0)) - return _cairo_surface_create_in_error (CAIRO_STATUS_INVALID_SIZE); - if (unlikely (! CAIRO_CONTENT_VALID (content))) - return _cairo_surface_create_in_error (CAIRO_STATUS_INVALID_CONTENT); - - /* We inherit the device scale, so create a larger surface */ - width = width * other->device_transform.xx; - height = height * other->device_transform.yy; - - surface = NULL; - if (other->backend->create_similar) - surface = other->backend->create_similar (other, content, width, height); - if (surface == NULL) - surface = cairo_surface_create_similar_image (other, - _cairo_format_from_content (content), - width, height); - - if (unlikely (surface->status)) - return surface; - - _cairo_surface_copy_similar_properties (surface, other); - cairo_surface_set_device_scale (surface, - other->device_transform.xx, - other->device_transform.yy); - - if (unlikely (surface->status)) - return surface; - - _cairo_pattern_init_solid (&pattern, CAIRO_COLOR_TRANSPARENT); - status = _cairo_surface_paint (surface, - CAIRO_OPERATOR_CLEAR, - &pattern.base, NULL); - if (unlikely (status)) { - cairo_surface_destroy (surface); - surface = _cairo_surface_create_in_error (status); - } - - assert (surface->is_clear); - - return surface; -} - -/** - * cairo_surface_create_similar_image: - * @other: an existing surface used to select the preference of the new surface - * @format: the format for the new surface - * @width: width of the new surface, (in pixels) - * @height: height of the new surface (in pixels) - * - * Create a new image surface that is as compatible as possible for uploading - * to and the use in conjunction with an existing surface. However, this surface - * can still be used like any normal image surface. Unlike - * cairo_surface_create_similar() the new image surface won't inherit - * the device scale from @other. - * - * Initially the surface contents are all 0 (transparent if contents - * have transparency, black otherwise.) - * - * Use cairo_surface_create_similar() if you don't need an image surface. - * - * Return value: a pointer to the newly allocated image 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 @other is already in an error state - * or any other error occurs. - * - * Since: 1.12 - **/ -cairo_surface_t * -cairo_surface_create_similar_image (cairo_surface_t *other, - cairo_format_t format, - int width, - int height) -{ - cairo_surface_t *image; - - if (unlikely (other->status)) - return _cairo_surface_create_in_error (other->status); - if (unlikely (other->finished)) - return _cairo_surface_create_in_error (CAIRO_STATUS_SURFACE_FINISHED); - - if (unlikely (width < 0 || height < 0)) - return _cairo_surface_create_in_error (CAIRO_STATUS_INVALID_SIZE); - if (unlikely (! CAIRO_FORMAT_VALID (format))) - return _cairo_surface_create_in_error (CAIRO_STATUS_INVALID_FORMAT); - - image = NULL; - if (other->backend->create_similar_image) - image = other->backend->create_similar_image (other, - format, width, height); - if (image == NULL) - image = cairo_image_surface_create (format, width, height); - - assert (image->is_clear); - - return image; -} -slim_hidden_def (cairo_surface_create_similar_image); - -/** - * _cairo_surface_map_to_image: - * @surface: an existing surface used to extract the image from - * @extents: limit the extraction to an rectangular region - * - * Returns an image surface that is the most efficient mechanism for - * modifying the backing store of the target surface. The region - * retrieved is limited to @extents. - * - * Note, the use of the original surface as a target or source whilst - * it is mapped is undefined. The result of mapping the surface - * multiple times is undefined. Calling cairo_surface_destroy() or - * cairo_surface_finish() on the resulting image surface results in - * undefined behavior. Changing the device transform of the image - * surface or of @surface before the image surface is unmapped results - * in undefined behavior. - * - * Assumes that @surface is valid (CAIRO_STATUS_SUCCESS, - * non-finished). - * - * Return value: a pointer to the newly allocated image surface. The - * caller must use _cairo_surface_unmap_image() to destroy this image - * surface. - * - * This function always returns a valid pointer, but it will return a - * pointer to a "nil" surface if @other is already in an error state - * or any other error occurs. - * - * The returned image might have a %CAIRO_FORMAT_INVALID format. - **/ -cairo_image_surface_t * -_cairo_surface_map_to_image (cairo_surface_t *surface, - const cairo_rectangle_int_t *extents) -{ - cairo_image_surface_t *image = NULL; - - assert (extents != NULL); - - /* TODO: require map_to_image != NULL */ - if (surface->backend->map_to_image) - image = surface->backend->map_to_image (surface, extents); - - if (image == NULL) - image = _cairo_image_surface_clone_subimage (surface, extents); - - return image; -} - -/** - * _cairo_surface_unmap_image: - * @surface: the surface passed to _cairo_surface_map_to_image(). - * @image: the currently mapped image - * - * Unmaps the image surface as returned from - * _cairo_surface_map_to_image(). - * - * The content of the image will be uploaded to the target surface. - * Afterwards, the image is destroyed. - * - * Using an image surface which wasn't returned by - * _cairo_surface_map_to_image() results in undefined behavior. - * - * An image surface in error status can be passed to - * _cairo_surface_unmap_image(). - * - * Return value: the unmap status. - * - * Even if the unmap status is not successful, @image is destroyed. - **/ -cairo_int_status_t -_cairo_surface_unmap_image (cairo_surface_t *surface, - cairo_image_surface_t *image) -{ - cairo_surface_pattern_t pattern; - cairo_rectangle_int_t extents; - cairo_clip_t *clip; - cairo_int_status_t status; - - /* map_to_image can return error surfaces */ - if (unlikely (image->base.status)) { - status = image->base.status; - goto destroy; - } - - /* If the image is untouched just skip the update */ - if (image->base.serial == 0) { - status = CAIRO_STATUS_SUCCESS; - goto destroy; - } - - /* TODO: require unmap_image != NULL */ - if (surface->backend->unmap_image && - ! _cairo_image_surface_is_clone (image)) - { - status = surface->backend->unmap_image (surface, image); - if (status != CAIRO_INT_STATUS_UNSUPPORTED) - return status; - } - - _cairo_pattern_init_for_surface (&pattern, &image->base); - pattern.base.filter = CAIRO_FILTER_NEAREST; - - /* We have to apply the translate from map_to_image's extents.x and .y */ - cairo_matrix_init_translate (&pattern.base.matrix, - image->base.device_transform.x0, - image->base.device_transform.y0); - - /* And we also have to clip the operation to the image's extents */ - extents.x = image->base.device_transform_inverse.x0; - extents.y = image->base.device_transform_inverse.y0; - extents.width = image->width; - extents.height = image->height; - clip = _cairo_clip_intersect_rectangle (NULL, &extents); - - status = _cairo_surface_paint (surface, - CAIRO_OPERATOR_SOURCE, - &pattern.base, - clip); - - _cairo_pattern_fini (&pattern.base); - _cairo_clip_destroy (clip); - -destroy: - cairo_surface_finish (&image->base); - cairo_surface_destroy (&image->base); - - return status; -} - -/** - * cairo_surface_map_to_image: - * @surface: an existing surface used to extract the image from - * @extents: limit the extraction to an rectangular region - * - * Returns an image surface that is the most efficient mechanism for - * modifying the backing store of the target surface. The region retrieved - * may be limited to the @extents or %NULL for the whole surface - * - * Note, the use of the original surface as a target or source whilst - * it is mapped is undefined. The result of mapping the surface - * multiple times is undefined. Calling cairo_surface_destroy() or - * cairo_surface_finish() on the resulting image surface results in - * undefined behavior. Changing the device transform of the image - * surface or of @surface before the image surface is unmapped results - * in undefined behavior. - * - * Return value: a pointer to the newly allocated image surface. The caller - * must use cairo_surface_unmap_image() to destroy this image surface. - * - * This function always returns a valid pointer, but it will return a - * pointer to a "nil" surface if @other is already in an error state - * or any other error occurs. If the returned pointer does not have an - * error status, it is guaranteed to be an image surface whose format - * is not %CAIRO_FORMAT_INVALID. - * - * Since: 1.12 - **/ -cairo_surface_t * -cairo_surface_map_to_image (cairo_surface_t *surface, - const cairo_rectangle_int_t *extents) -{ - cairo_rectangle_int_t rect; - cairo_image_surface_t *image; - cairo_status_t status; - - if (unlikely (surface->status)) - return _cairo_surface_create_in_error (surface->status); - if (unlikely (surface->finished)) - return _cairo_surface_create_in_error (CAIRO_STATUS_SURFACE_FINISHED); - - if (extents == NULL) { - if (unlikely (! surface->backend->get_extents (surface, &rect))) - return _cairo_surface_create_in_error (CAIRO_STATUS_INVALID_SIZE); - - extents = ▭ - } else { - cairo_rectangle_int_t surface_extents; - - /* If this surface is bounded, we can't map parts - * that are outside of it. */ - if (likely (surface->backend->get_extents (surface, &surface_extents))) { - if (unlikely (! _cairo_rectangle_contains_rectangle (&surface_extents, extents))) - return _cairo_surface_create_in_error (CAIRO_STATUS_INVALID_SIZE); - } - } - - image = _cairo_surface_map_to_image (surface, extents); - - status = image->base.status; - if (unlikely (status)) { - cairo_surface_destroy (&image->base); - return _cairo_surface_create_in_error (status); - } - - if (image->format == CAIRO_FORMAT_INVALID) { - cairo_surface_destroy (&image->base); - image = _cairo_image_surface_clone_subimage (surface, extents); - } - - return &image->base; -} - -/** - * cairo_surface_unmap_image: - * @surface: the surface passed to cairo_surface_map_to_image(). - * @image: the currently mapped image - * - * Unmaps the image surface as returned from #cairo_surface_map_to_image(). - * - * The content of the image will be uploaded to the target surface. - * Afterwards, the image is destroyed. - * - * Using an image surface which wasn't returned by cairo_surface_map_to_image() - * results in undefined behavior. - * - * Since: 1.12 - **/ -void -cairo_surface_unmap_image (cairo_surface_t *surface, - cairo_surface_t *image) -{ - cairo_int_status_t status = CAIRO_STATUS_SUCCESS; - - if (unlikely (surface->status)) { - status = surface->status; - goto error; - } - if (unlikely (surface->finished)) { - status = _cairo_error (CAIRO_STATUS_SURFACE_FINISHED); - goto error; - } - if (unlikely (image->status)) { - status = image->status; - goto error; - } - if (unlikely (image->finished)) { - status = _cairo_error (CAIRO_STATUS_SURFACE_FINISHED); - goto error; - } - if (unlikely (! _cairo_surface_is_image (image))) { - status = _cairo_error (CAIRO_STATUS_SURFACE_TYPE_MISMATCH); - goto error; - } - - status = _cairo_surface_unmap_image (surface, - (cairo_image_surface_t *) image); - if (unlikely (status)) - _cairo_surface_set_error (surface, status); - - return; - -error: - _cairo_surface_set_error (surface, status); - cairo_surface_finish (image); - cairo_surface_destroy (image); -} - -cairo_surface_t * -_cairo_surface_create_scratch (cairo_surface_t *other, - cairo_content_t content, - int width, - int height, - const cairo_color_t *color) -{ - cairo_surface_t *surface; - cairo_status_t status; - cairo_solid_pattern_t pattern; - - if (unlikely (other->status)) - return _cairo_surface_create_in_error (other->status); - - surface = NULL; - if (other->backend->create_similar) - surface = other->backend->create_similar (other, content, width, height); - if (surface == NULL) - surface = cairo_surface_create_similar_image (other, - _cairo_format_from_content (content), - width, height); - - if (unlikely (surface->status)) - return surface; - - _cairo_surface_copy_similar_properties (surface, other); - - if (unlikely (surface->status)) - return surface; - - if (color) { - _cairo_pattern_init_solid (&pattern, color); - status = _cairo_surface_paint (surface, - color == CAIRO_COLOR_TRANSPARENT ? - CAIRO_OPERATOR_CLEAR : CAIRO_OPERATOR_SOURCE, - &pattern.base, NULL); - if (unlikely (status)) { - cairo_surface_destroy (surface); - surface = _cairo_surface_create_in_error (status); - } - } - - return surface; -} - -/** - * cairo_surface_reference: - * @surface: a #cairo_surface_t - * - * Increases the reference count on @surface by one. This prevents - * @surface from being destroyed until a matching call to - * cairo_surface_destroy() is made. - * - * Use cairo_surface_get_reference_count() to get the number of - * references to a #cairo_surface_t. - * - * Return value: the referenced #cairo_surface_t. - * - * Since: 1.0 - **/ -cairo_surface_t * -cairo_surface_reference (cairo_surface_t *surface) -{ - if (surface == NULL || - CAIRO_REFERENCE_COUNT_IS_INVALID (&surface->ref_count)) - return surface; - - assert (CAIRO_REFERENCE_COUNT_HAS_REFERENCE (&surface->ref_count)); - - _cairo_reference_count_inc (&surface->ref_count); - - return surface; -} -slim_hidden_def (cairo_surface_reference); - -/** - * cairo_surface_destroy: - * @surface: a #cairo_surface_t - * - * Decreases the reference count on @surface by one. If the result is - * zero, then @surface and all associated resources are freed. See - * cairo_surface_reference(). - * - * Since: 1.0 - **/ -void -cairo_surface_destroy (cairo_surface_t *surface) -{ - if (surface == NULL || - CAIRO_REFERENCE_COUNT_IS_INVALID (&surface->ref_count)) - return; - - assert (CAIRO_REFERENCE_COUNT_HAS_REFERENCE (&surface->ref_count)); - - if (! _cairo_reference_count_dec_and_test (&surface->ref_count)) - return; - - assert (surface->snapshot_of == NULL); - - if (! surface->finished) { - _cairo_surface_finish_snapshots (surface); - /* We may have been referenced by a snapshot prior to have - * detaching it with the copy-on-write. - */ - if (CAIRO_REFERENCE_COUNT_GET_VALUE (&surface->ref_count)) - return; - - _cairo_surface_finish (surface); - } - - if (surface->damage) - _cairo_damage_destroy (surface->damage); - - _cairo_user_data_array_fini (&surface->user_data); - _cairo_user_data_array_fini (&surface->mime_data); - - if (surface->owns_device) - cairo_device_destroy (surface->device); - - assert (surface->snapshot_of == NULL); - assert (! _cairo_surface_has_snapshots (surface)); - /* paranoid check that nobody took a reference whilst finishing */ - assert (! CAIRO_REFERENCE_COUNT_HAS_REFERENCE (&surface->ref_count)); - - free (surface); -} -slim_hidden_def(cairo_surface_destroy); - -/** - * cairo_surface_get_reference_count: - * @surface: a #cairo_surface_t - * - * Returns the current reference count of @surface. - * - * Return value: the current reference count of @surface. If the - * object is a nil object, 0 will be returned. - * - * Since: 1.4 - **/ -unsigned int -cairo_surface_get_reference_count (cairo_surface_t *surface) -{ - if (surface == NULL || - CAIRO_REFERENCE_COUNT_IS_INVALID (&surface->ref_count)) - return 0; - - return CAIRO_REFERENCE_COUNT_GET_VALUE (&surface->ref_count); -} - -static void -_cairo_surface_finish_snapshots (cairo_surface_t *surface) -{ - cairo_status_t status; - - /* update the snapshots *before* we declare the surface as finished */ - surface->_finishing = TRUE; - status = _cairo_surface_flush (surface, 0); - (void) status; -} - -static void -_cairo_surface_finish (cairo_surface_t *surface) -{ - cairo_status_t status; - - /* call finish even if in error mode */ - if (surface->backend->finish) { - status = surface->backend->finish (surface); - if (unlikely (status)) - _cairo_surface_set_error (surface, status); - } - - surface->finished = TRUE; - - assert (surface->snapshot_of == NULL); - assert (!_cairo_surface_has_snapshots (surface)); -} - -/** - * cairo_surface_finish: - * @surface: the #cairo_surface_t to finish - * - * This function finishes the surface and drops all references to - * external resources. For example, for the Xlib backend it means - * that cairo will no longer access the drawable, which can be freed. - * After calling cairo_surface_finish() the only valid operations on a - * surface are getting and setting user, referencing and - * destroying, and flushing and finishing it. - * Further drawing to the surface will not affect the - * surface but will instead trigger a %CAIRO_STATUS_SURFACE_FINISHED - * error. - * - * When the last call to cairo_surface_destroy() decreases the - * reference count to zero, cairo will call cairo_surface_finish() if - * it hasn't been called already, before freeing the resources - * associated with the surface. - * - * Since: 1.0 - **/ -void -cairo_surface_finish (cairo_surface_t *surface) -{ - if (surface == NULL) - return; - - if (CAIRO_REFERENCE_COUNT_IS_INVALID (&surface->ref_count)) - return; - - if (surface->finished) - return; - - /* We have to be careful when decoupling potential reference cycles */ - cairo_surface_reference (surface); - - _cairo_surface_finish_snapshots (surface); - /* XXX need to block and wait for snapshot references */ - _cairo_surface_finish (surface); - - cairo_surface_destroy (surface); -} -slim_hidden_def (cairo_surface_finish); - -/** - * _cairo_surface_release_device_reference: - * @surface: a #cairo_surface_t - * - * This function makes @surface release the reference to its device. The - * function is intended to be used for avoiding cycling references for - * surfaces that are owned by their device, for example cache surfaces. - * Note that the @surface will still assume that the device is available. - * So it is the caller's responsibility to ensure the device stays around - * until the @surface is destroyed. Just calling cairo_surface_finish() is - * not enough. - **/ -void -_cairo_surface_release_device_reference (cairo_surface_t *surface) -{ - assert (surface->owns_device); - - cairo_device_destroy (surface->device); - surface->owns_device = FALSE; -} - -/** - * cairo_surface_get_user_data: - * @surface: a #cairo_surface_t - * @key: the address of the #cairo_user_data_key_t the user data was - * attached to - * - * Return user data previously attached to @surface using the specified - * key. If no user data has been attached with the given key this - * function returns %NULL. - * - * Return value: the user data previously attached or %NULL. - * - * Since: 1.0 - **/ -void * -cairo_surface_get_user_data (cairo_surface_t *surface, - const cairo_user_data_key_t *key) -{ - /* Prevent reads of the array during teardown */ - if (! CAIRO_REFERENCE_COUNT_HAS_REFERENCE (&surface->ref_count)) - return NULL; - - return _cairo_user_data_array_get_data (&surface->user_data, key); -} - -/** - * cairo_surface_set_user_data: - * @surface: a #cairo_surface_t - * @key: the address of a #cairo_user_data_key_t to attach the user data to - * @user_data: the user data to attach to the surface - * @destroy: a #cairo_destroy_func_t which will be called when the - * surface is destroyed or when new user data is attached using the - * same key. - * - * Attach user data to @surface. To remove user data from a surface, - * call this function with the key that was used to set it and %NULL - * for @data. - * - * Return value: %CAIRO_STATUS_SUCCESS or %CAIRO_STATUS_NO_MEMORY if a - * slot could not be allocated for the user data. - * - * Since: 1.0 - **/ -cairo_status_t -cairo_surface_set_user_data (cairo_surface_t *surface, - const cairo_user_data_key_t *key, - void *user_data, - cairo_destroy_func_t destroy) -{ - if (CAIRO_REFERENCE_COUNT_IS_INVALID (&surface->ref_count)) - return surface->status; - - if (! CAIRO_REFERENCE_COUNT_HAS_REFERENCE (&surface->ref_count)) - return _cairo_error (CAIRO_STATUS_SURFACE_FINISHED); - - return _cairo_user_data_array_set_data (&surface->user_data, - key, user_data, destroy); -} - -/** - * cairo_surface_get_mime_data: - * @surface: a #cairo_surface_t - * @mime_type: the mime type of the image data - * @data: the image data to attached to the surface - * @length: the length of the image data - * - * Return mime data previously attached to @surface using the - * specified mime type. If no data has been attached with the given - * mime type, @data is set %NULL. - * - * Since: 1.10 - **/ -void -cairo_surface_get_mime_data (cairo_surface_t *surface, - const char *mime_type, - const unsigned char **data, - unsigned long *length) -{ - cairo_user_data_slot_t *slots; - int i, num_slots; - - *data = NULL; - *length = 0; - - /* Prevent reads of the array during teardown */ - if (! CAIRO_REFERENCE_COUNT_HAS_REFERENCE (&surface->ref_count)) - return; - - /* The number of mime-types attached to a surface is usually small, - * typically zero. Therefore it is quicker to do a strcmp() against - * each key than it is to intern the string (i.e. compute a hash, - * search the hash table, and do a final strcmp). - */ - num_slots = surface->mime_data.num_elements; - slots = _cairo_array_index (&surface->mime_data, 0); - for (i = 0; i < num_slots; i++) { - if (slots[i].key != NULL && strcmp ((char *) slots[i].key, mime_type) == 0) { - cairo_mime_data_t *mime_data = slots[i].user_data; - - *data = mime_data->data; - *length = mime_data->length; - return; - } - } -} -slim_hidden_def (cairo_surface_get_mime_data); - -static void -_cairo_mime_data_destroy (void *ptr) -{ - cairo_mime_data_t *mime_data = ptr; - - if (! _cairo_reference_count_dec_and_test (&mime_data->ref_count)) - return; - - if (mime_data->destroy && mime_data->closure) - mime_data->destroy (mime_data->closure); - - free (mime_data); -} - - -static const char *_cairo_surface_image_mime_types[] = { - CAIRO_MIME_TYPE_JPEG, - CAIRO_MIME_TYPE_PNG, - CAIRO_MIME_TYPE_JP2, - CAIRO_MIME_TYPE_JBIG2, - CAIRO_MIME_TYPE_CCITT_FAX, -}; - -cairo_bool_t -_cairo_surface_has_mime_image (cairo_surface_t *surface) -{ - cairo_user_data_slot_t *slots; - int i, j, num_slots; - - /* Prevent reads of the array during teardown */ - if (! CAIRO_REFERENCE_COUNT_HAS_REFERENCE (&surface->ref_count)) - return FALSE; - - /* The number of mime-types attached to a surface is usually small, - * typically zero. Therefore it is quicker to do a strcmp() against - * each key than it is to intern the string (i.e. compute a hash, - * search the hash table, and do a final strcmp). - */ - num_slots = surface->mime_data.num_elements; - slots = _cairo_array_index (&surface->mime_data, 0); - for (i = 0; i < num_slots; i++) { - if (slots[i].key != NULL) { - for (j = 0; j < ARRAY_LENGTH (_cairo_surface_image_mime_types); j++) { - if (strcmp ((char *) slots[i].key, _cairo_surface_image_mime_types[j]) == 0) - return TRUE; - } - } - } - - return FALSE; -} - -/** - * CAIRO_MIME_TYPE_CCITT_FAX: - * - * Group 3 or Group 4 CCITT facsimile encoding (International - * Telecommunication Union, Recommendations T.4 and T.6.) - * - * Since: 1.16 - **/ - -/** - * CAIRO_MIME_TYPE_CCITT_FAX_PARAMS: - * - * Decode parameters for Group 3 or Group 4 CCITT facsimile encoding. - * See [CCITT Fax Images][ccitt]. - * - * Since: 1.16 - **/ - -/** - * CAIRO_MIME_TYPE_EPS: - * - * Encapsulated PostScript file. - * [Encapsulated PostScript File Format Specification](http://wwwimages.adobe.com/content/dam/Adobe/endevnet/postscript/pdfs/5002.EPSF_Spec.pdf) - * - * Since: 1.16 - **/ - -/** - * CAIRO_MIME_TYPE_EPS_PARAMS: - * - * Embedding parameters Encapsulated PostScript data. - * See [Embedding EPS files][eps]. - * - * Since: 1.16 - **/ - -/** - * CAIRO_MIME_TYPE_JBIG2: - * - * Joint Bi-level Image Experts Group image coding standard (ISO/IEC 11544). - * - * Since: 1.14 - **/ - -/** - * CAIRO_MIME_TYPE_JBIG2_GLOBAL: - * - * Joint Bi-level Image Experts Group image coding standard (ISO/IEC 11544) global segment. - * - * Since: 1.14 - **/ - -/** - * CAIRO_MIME_TYPE_JBIG2_GLOBAL_ID: - * - * An unique identifier shared by a JBIG2 global segment and all JBIG2 images - * that depend on the global segment. - * - * Since: 1.14 - **/ - -/** - * CAIRO_MIME_TYPE_JP2: - * - * The Joint Photographic Experts Group (JPEG) 2000 image coding standard (ISO/IEC 15444-1). - * - * Since: 1.10 - **/ - -/** - * CAIRO_MIME_TYPE_JPEG: - * - * The Joint Photographic Experts Group (JPEG) image coding standard (ISO/IEC 10918-1). - * - * Since: 1.10 - **/ - -/** - * CAIRO_MIME_TYPE_PNG: - * - * The Portable Network Graphics image file format (ISO/IEC 15948). - * - * Since: 1.10 - **/ - -/** - * CAIRO_MIME_TYPE_URI: - * - * URI for an image file (unofficial MIME type). - * - * Since: 1.10 - **/ - -/** - * CAIRO_MIME_TYPE_UNIQUE_ID: - * - * Unique identifier for a surface (cairo specific MIME type). All surfaces with - * the same unique identifier will only be embedded once. - * - * Since: 1.12 - **/ - -/** - * cairo_surface_set_mime_data: - * @surface: a #cairo_surface_t - * @mime_type: the MIME type of the image data - * @data: the image data to attach to the surface - * @length: the length of the image data - * @destroy: a #cairo_destroy_func_t which will be called when the - * surface is destroyed or when new image data is attached using the - * same mime type. - * @closure: the data to be passed to the @destroy notifier - * - * Attach an image in the format @mime_type to @surface. To remove - * the data from a surface, call this function with same mime type - * and %NULL for @data. - * - * The attached image (or filename) data can later be used by backends - * which support it (currently: PDF, PS, SVG and Win32 Printing - * surfaces) to emit this data instead of making a snapshot of the - * @surface. This approach tends to be faster and requires less - * memory and disk space. - * - * The recognized MIME types are the following: %CAIRO_MIME_TYPE_JPEG, - * %CAIRO_MIME_TYPE_PNG, %CAIRO_MIME_TYPE_JP2, %CAIRO_MIME_TYPE_URI, - * %CAIRO_MIME_TYPE_UNIQUE_ID, %CAIRO_MIME_TYPE_JBIG2, - * %CAIRO_MIME_TYPE_JBIG2_GLOBAL, %CAIRO_MIME_TYPE_JBIG2_GLOBAL_ID, - * %CAIRO_MIME_TYPE_CCITT_FAX, %CAIRO_MIME_TYPE_CCITT_FAX_PARAMS. - * - * See corresponding backend surface docs for details about which MIME - * types it can handle. Caution: the associated MIME data will be - * discarded if you draw on the surface afterwards. Use this function - * with care. - * - * Even if a backend supports a MIME type, that does not mean cairo - * will always be able to use the attached MIME data. For example, if - * the backend does not natively support the compositing operation used - * to apply the MIME data to the backend. In that case, the MIME data - * will be ignored. Therefore, to apply an image in all cases, it is best - * to create an image surface which contains the decoded image data and - * then attach the MIME data to that. This ensures the image will always - * be used while still allowing the MIME data to be used whenever - * possible. - * - * Return value: %CAIRO_STATUS_SUCCESS or %CAIRO_STATUS_NO_MEMORY if a - * slot could not be allocated for the user data. - * - * Since: 1.10 - **/ -cairo_status_t -cairo_surface_set_mime_data (cairo_surface_t *surface, - const char *mime_type, - const unsigned char *data, - unsigned long length, - cairo_destroy_func_t destroy, - void *closure) -{ - cairo_status_t status; - cairo_mime_data_t *mime_data; - - if (CAIRO_REFERENCE_COUNT_IS_INVALID (&surface->ref_count)) - return surface->status; - - if (! CAIRO_REFERENCE_COUNT_HAS_REFERENCE (&surface->ref_count)) - return _cairo_error (CAIRO_STATUS_SURFACE_FINISHED); - - if (unlikely (surface->status)) - return surface->status; - if (unlikely (surface->finished)) - return _cairo_surface_set_error (surface, _cairo_error (CAIRO_STATUS_SURFACE_FINISHED)); - - status = _cairo_intern_string (&mime_type, -1); - if (unlikely (status)) - return _cairo_surface_set_error (surface, status); - - if (data != NULL) { - mime_data = _cairo_malloc (sizeof (cairo_mime_data_t)); - if (unlikely (mime_data == NULL)) - return _cairo_surface_set_error (surface, _cairo_error (CAIRO_STATUS_NO_MEMORY)); - - CAIRO_REFERENCE_COUNT_INIT (&mime_data->ref_count, 1); - - mime_data->data = (unsigned char *) data; - mime_data->length = length; - mime_data->destroy = destroy; - mime_data->closure = closure; - } else - mime_data = NULL; - - status = _cairo_user_data_array_set_data (&surface->mime_data, - (cairo_user_data_key_t *) mime_type, - mime_data, - _cairo_mime_data_destroy); - if (unlikely (status)) { - free (mime_data); - - return _cairo_surface_set_error (surface, status); - } - - surface->is_clear = FALSE; - - return CAIRO_STATUS_SUCCESS; -} -slim_hidden_def (cairo_surface_set_mime_data); - -/** - * cairo_surface_supports_mime_type: - * @surface: a #cairo_surface_t - * @mime_type: the mime type - * - * Return whether @surface supports @mime_type. - * - * Return value: %TRUE if @surface supports - * @mime_type, %FALSE otherwise - * - * Since: 1.12 - **/ -cairo_bool_t -cairo_surface_supports_mime_type (cairo_surface_t *surface, - const char *mime_type) -{ - const char **types; - - if (unlikely (surface->status)) - return FALSE; - if (unlikely (surface->finished)) { - _cairo_surface_set_error (surface, _cairo_error (CAIRO_STATUS_SURFACE_FINISHED)); - return FALSE; - } - - if (surface->backend->get_supported_mime_types) { - types = surface->backend->get_supported_mime_types (surface); - if (types) { - while (*types) { - if (strcmp (*types, mime_type) == 0) - return TRUE; - types++; - } - } - } - - return FALSE; -} -slim_hidden_def (cairo_surface_supports_mime_type); - -static void -_cairo_mime_data_reference (const void *key, void *elt, void *closure) -{ - cairo_mime_data_t *mime_data = elt; - - _cairo_reference_count_inc (&mime_data->ref_count); -} - -cairo_status_t -_cairo_surface_copy_mime_data (cairo_surface_t *dst, - cairo_surface_t *src) -{ - cairo_status_t status; - - if (dst->status) - return dst->status; - - if (src->status) - return _cairo_surface_set_error (dst, src->status); - - /* first copy the mime-data, discarding any already set on dst */ - status = _cairo_user_data_array_copy (&dst->mime_data, &src->mime_data); - if (unlikely (status)) - return _cairo_surface_set_error (dst, status); - - /* now increment the reference counters for the copies */ - _cairo_user_data_array_foreach (&dst->mime_data, - _cairo_mime_data_reference, - NULL); - - dst->is_clear = FALSE; - - return CAIRO_STATUS_SUCCESS; -} - -/** - * _cairo_surface_set_font_options: - * @surface: a #cairo_surface_t - * @options: a #cairo_font_options_t object that contains the - * options to use for this surface instead of backend's default - * font options. - * - * Sets the default font rendering options for the surface. - * This is useful to correctly propagate default font options when - * falling back to an image surface in a backend implementation. - * This affects the options returned in cairo_surface_get_font_options(). - * - * If @options is %NULL the surface options are reset to those of - * the backend default. - **/ -void -_cairo_surface_set_font_options (cairo_surface_t *surface, - cairo_font_options_t *options) -{ - if (surface->status) - return; - - assert (surface->snapshot_of == NULL); - - if (surface->finished) { - _cairo_surface_set_error (surface, _cairo_error (CAIRO_STATUS_SURFACE_FINISHED)); - return; - } - - if (options) { - surface->has_font_options = TRUE; - _cairo_font_options_init_copy (&surface->font_options, options); - } else { - surface->has_font_options = FALSE; - } -} - -/** - * cairo_surface_get_font_options: - * @surface: a #cairo_surface_t - * @options: a #cairo_font_options_t object into which to store - * the retrieved options. All existing values are overwritten - * - * Retrieves the default font rendering options for the surface. - * This allows display surfaces to report the correct subpixel order - * for rendering on them, print surfaces to disable hinting of - * metrics and so forth. The result can then be used with - * cairo_scaled_font_create(). - * - * Since: 1.0 - **/ -void -cairo_surface_get_font_options (cairo_surface_t *surface, - cairo_font_options_t *options) -{ - if (cairo_font_options_status (options)) - return; - - if (surface->status) { - _cairo_font_options_init_default (options); - return; - } - - if (! surface->has_font_options) { - surface->has_font_options = TRUE; - - _cairo_font_options_init_default (&surface->font_options); - - if (!surface->finished && surface->backend->get_font_options) { - surface->backend->get_font_options (surface, &surface->font_options); - } - } - - _cairo_font_options_init_copy (options, &surface->font_options); -} -slim_hidden_def (cairo_surface_get_font_options); - -cairo_status_t -_cairo_surface_flush (cairo_surface_t *surface, unsigned flags) -{ - /* update the current snapshots *before* the user updates the surface */ - _cairo_surface_detach_snapshots (surface); - if (surface->snapshot_of != NULL) - _cairo_surface_detach_snapshot (surface); - _cairo_surface_detach_mime_data (surface); - - return __cairo_surface_flush (surface, flags); -} - -/** - * cairo_surface_flush: - * @surface: a #cairo_surface_t - * - * Do any pending drawing for the surface and also restore any temporary - * modifications cairo has made to the surface's state. This function - * must be called before switching from drawing on the surface with - * cairo to drawing on it directly with native APIs, or accessing its - * memory outside of Cairo. If the surface doesn't support direct - * access, then this function does nothing. - * - * Since: 1.0 - **/ -void -cairo_surface_flush (cairo_surface_t *surface) -{ - cairo_status_t status; - - if (surface->status) - return; - - if (surface->finished) - return; - - status = _cairo_surface_flush (surface, 0); - if (unlikely (status)) - _cairo_surface_set_error (surface, status); -} -slim_hidden_def (cairo_surface_flush); - -/** - * cairo_surface_mark_dirty: - * @surface: a #cairo_surface_t - * - * Tells cairo that drawing has been done to surface using means other - * than cairo, and that cairo should reread any cached areas. Note - * that you must call cairo_surface_flush() before doing such drawing. - * - * Since: 1.0 - **/ -void -cairo_surface_mark_dirty (cairo_surface_t *surface) -{ - cairo_rectangle_int_t extents; - - if (unlikely (surface->status)) - return; - if (unlikely (surface->finished)) { - _cairo_surface_set_error (surface, _cairo_error (CAIRO_STATUS_SURFACE_FINISHED)); - return; - } - - _cairo_surface_get_extents (surface, &extents); - cairo_surface_mark_dirty_rectangle (surface, - extents.x, extents.y, - extents.width, extents.height); -} -slim_hidden_def (cairo_surface_mark_dirty); - -/** - * cairo_surface_mark_dirty_rectangle: - * @surface: a #cairo_surface_t - * @x: X coordinate of dirty rectangle - * @y: Y coordinate of dirty rectangle - * @width: width of dirty rectangle - * @height: height of dirty rectangle - * - * Like cairo_surface_mark_dirty(), but drawing has been done only to - * the specified rectangle, so that cairo can retain cached contents - * for other parts of the surface. - * - * Any cached clip set on the surface will be reset by this function, - * to make sure that future cairo calls have the clip set that they - * expect. - * - * Since: 1.0 - **/ -void -cairo_surface_mark_dirty_rectangle (cairo_surface_t *surface, - int x, - int y, - int width, - int height) -{ - cairo_status_t status; - - if (unlikely (surface->status)) - return; - - assert (surface->snapshot_of == NULL); - - if (unlikely (surface->finished)) { - _cairo_surface_set_error (surface, _cairo_error (CAIRO_STATUS_SURFACE_FINISHED)); - return; - } - - /* The application *should* have called cairo_surface_flush() before - * modifying the surface independently of cairo (and thus having to - * call mark_dirty()). */ - assert (! _cairo_surface_has_snapshots (surface)); - assert (! _cairo_surface_has_mime_data (surface)); - - surface->is_clear = FALSE; - surface->serial++; - - if (surface->damage) { - cairo_box_t box; - - box.p1.x = x; - box.p1.y = y; - box.p2.x = x + width; - box.p2.y = y + height; - - surface->damage = _cairo_damage_add_box (surface->damage, &box); - } - - if (surface->backend->mark_dirty_rectangle != NULL) { - /* XXX: FRAGILE: We're ignoring the scaling component of - * device_transform here. I don't know what the right thing to - * do would actually be if there were some scaling here, but - * we avoid this since device_transfom scaling is not exported - * publicly and mark_dirty is not used internally. */ - status = surface->backend->mark_dirty_rectangle (surface, - x + surface->device_transform.x0, - y + surface->device_transform.y0, - width, height); - - if (unlikely (status)) - _cairo_surface_set_error (surface, status); - } -} -slim_hidden_def (cairo_surface_mark_dirty_rectangle); - -/** - * cairo_surface_set_device_scale: - * @surface: a #cairo_surface_t - * @x_scale: a scale factor in the X direction - * @y_scale: a scale factor in the Y direction - * - * Sets a scale that is multiplied to the device coordinates determined - * by the CTM when drawing to @surface. One common use for this is to - * render to very high resolution display devices at a scale factor, so - * that code that assumes 1 pixel will be a certain size will still work. - * Setting a transformation via cairo_translate() isn't - * sufficient to do this, since functions like - * cairo_device_to_user() will expose the hidden scale. - * - * Note that the scale affects drawing to the surface as well as - * using the surface in a source pattern. - * - * Since: 1.14 - **/ -void -cairo_surface_set_device_scale (cairo_surface_t *surface, - double x_scale, - double y_scale) -{ - cairo_status_t status; - - if (unlikely (surface->status)) - return; - - assert (surface->snapshot_of == NULL); - - if (unlikely (surface->finished)) { - _cairo_surface_set_error (surface, _cairo_error (CAIRO_STATUS_SURFACE_FINISHED)); - return; - } - - status = _cairo_surface_begin_modification (surface); - if (unlikely (status)) { - _cairo_surface_set_error (surface, status); - return; - } - - surface->device_transform.xx = x_scale; - surface->device_transform.yy = y_scale; - surface->device_transform.xy = 0.0; - surface->device_transform.yx = 0.0; - - surface->device_transform_inverse = surface->device_transform; - status = cairo_matrix_invert (&surface->device_transform_inverse); - /* should always be invertible unless given pathological input */ - assert (status == CAIRO_STATUS_SUCCESS); - - _cairo_observers_notify (&surface->device_transform_observers, surface); -} -slim_hidden_def (cairo_surface_set_device_scale); - -/** - * cairo_surface_get_device_scale: - * @surface: a #cairo_surface_t - * @x_scale: the scale in the X direction, in device units - * @y_scale: the scale in the Y direction, in device units - * - * This function returns the previous device offset set by - * cairo_surface_set_device_scale(). - * - * Since: 1.14 - **/ -void -cairo_surface_get_device_scale (cairo_surface_t *surface, - double *x_scale, - double *y_scale) -{ - if (x_scale) - *x_scale = surface->device_transform.xx; - if (y_scale) - *y_scale = surface->device_transform.yy; -} -slim_hidden_def (cairo_surface_get_device_scale); - -/** - * cairo_surface_set_device_offset: - * @surface: a #cairo_surface_t - * @x_offset: the offset in the X direction, in device units - * @y_offset: the offset in the Y direction, in device units - * - * Sets an offset that is added to the device coordinates determined - * by the CTM when drawing to @surface. One use case for this function - * is when we want to create a #cairo_surface_t that redirects drawing - * for a portion of an onscreen surface to an offscreen surface in a - * way that is completely invisible to the user of the cairo - * API. Setting a transformation via cairo_translate() isn't - * sufficient to do this, since functions like - * cairo_device_to_user() will expose the hidden offset. - * - * Note that the offset affects drawing to the surface as well as - * using the surface in a source pattern. - * - * Since: 1.0 - **/ -void -cairo_surface_set_device_offset (cairo_surface_t *surface, - double x_offset, - double y_offset) -{ - cairo_status_t status; - - if (unlikely (surface->status)) - return; - - assert (surface->snapshot_of == NULL); - - if (unlikely (surface->finished)) { - _cairo_surface_set_error (surface, _cairo_error (CAIRO_STATUS_SURFACE_FINISHED)); - return; - } - - status = _cairo_surface_begin_modification (surface); - if (unlikely (status)) { - _cairo_surface_set_error (surface, status); - return; - } - - surface->device_transform.x0 = x_offset; - surface->device_transform.y0 = y_offset; - - surface->device_transform_inverse = surface->device_transform; - status = cairo_matrix_invert (&surface->device_transform_inverse); - /* should always be invertible unless given pathological input */ - assert (status == CAIRO_STATUS_SUCCESS); - - _cairo_observers_notify (&surface->device_transform_observers, surface); -} -slim_hidden_def (cairo_surface_set_device_offset); - -/** - * cairo_surface_get_device_offset: - * @surface: a #cairo_surface_t - * @x_offset: the offset in the X direction, in device units - * @y_offset: the offset in the Y direction, in device units - * - * This function returns the previous device offset set by - * cairo_surface_set_device_offset(). - * - * Since: 1.2 - **/ -void -cairo_surface_get_device_offset (cairo_surface_t *surface, - double *x_offset, - double *y_offset) -{ - if (x_offset) - *x_offset = surface->device_transform.x0; - if (y_offset) - *y_offset = surface->device_transform.y0; -} -slim_hidden_def (cairo_surface_get_device_offset); - -/** - * cairo_surface_set_fallback_resolution: - * @surface: a #cairo_surface_t - * @x_pixels_per_inch: horizontal setting for pixels per inch - * @y_pixels_per_inch: vertical setting for pixels per inch - * - * Set the horizontal and vertical resolution for image fallbacks. - * - * When certain operations aren't supported natively by a backend, - * cairo will fallback by rendering operations to an image and then - * overlaying that image onto the output. For backends that are - * natively vector-oriented, this function can be used to set the - * resolution used for these image fallbacks, (larger values will - * result in more detailed images, but also larger file sizes). - * - * Some examples of natively vector-oriented backends are the ps, pdf, - * and svg backends. - * - * For backends that are natively raster-oriented, image fallbacks are - * still possible, but they are always performed at the native - * device resolution. So this function has no effect on those - * backends. - * - * Note: The fallback resolution only takes effect at the time of - * completing a page (with cairo_show_page() or cairo_copy_page()) so - * there is currently no way to have more than one fallback resolution - * in effect on a single page. - * - * The default fallback resoultion is 300 pixels per inch in both - * dimensions. - * - * Since: 1.2 - **/ -void -cairo_surface_set_fallback_resolution (cairo_surface_t *surface, - double x_pixels_per_inch, - double y_pixels_per_inch) -{ - cairo_status_t status; - - if (unlikely (surface->status)) - return; - - assert (surface->snapshot_of == NULL); - - if (unlikely (surface->finished)) { - _cairo_surface_set_error (surface, _cairo_error (CAIRO_STATUS_SURFACE_FINISHED)); - return; - } - - if (x_pixels_per_inch <= 0 || y_pixels_per_inch <= 0) { - /* XXX Could delay raising the error until we fallback, but throwing - * the error here means that we can catch the real culprit. - */ - _cairo_surface_set_error (surface, CAIRO_STATUS_INVALID_MATRIX); - return; - } - - status = _cairo_surface_begin_modification (surface); - if (unlikely (status)) { - _cairo_surface_set_error (surface, status); - return; - } - - surface->x_fallback_resolution = x_pixels_per_inch; - surface->y_fallback_resolution = y_pixels_per_inch; -} -slim_hidden_def (cairo_surface_set_fallback_resolution); - -/** - * cairo_surface_get_fallback_resolution: - * @surface: a #cairo_surface_t - * @x_pixels_per_inch: horizontal pixels per inch - * @y_pixels_per_inch: vertical pixels per inch - * - * This function returns the previous fallback resolution set by - * cairo_surface_set_fallback_resolution(), or default fallback - * resolution if never set. - * - * Since: 1.8 - **/ -void -cairo_surface_get_fallback_resolution (cairo_surface_t *surface, - double *x_pixels_per_inch, - double *y_pixels_per_inch) -{ - if (x_pixels_per_inch) - *x_pixels_per_inch = surface->x_fallback_resolution; - if (y_pixels_per_inch) - *y_pixels_per_inch = surface->y_fallback_resolution; -} - -cairo_bool_t -_cairo_surface_has_device_transform (cairo_surface_t *surface) -{ - return ! _cairo_matrix_is_identity (&surface->device_transform); -} - -/** - * _cairo_surface_acquire_source_image: - * @surface: a #cairo_surface_t - * @image_out: location to store a pointer to an image surface that - * has identical contents to @surface. This surface could be @surface - * itself, a surface held internal to @surface, or it could be a new - * surface with a copy of the relevant portion of @surface. - * @image_extra: location to store image specific backend data - * - * Gets an image surface to use when drawing as a fallback when drawing with - * @surface as a source. _cairo_surface_release_source_image() must be called - * when finished. - * - * Return value: %CAIRO_STATUS_SUCCESS if an image was stored in @image_out. - * %CAIRO_INT_STATUS_UNSUPPORTED if an image cannot be retrieved for the specified - * surface. Or %CAIRO_STATUS_NO_MEMORY. - **/ -cairo_status_t -_cairo_surface_acquire_source_image (cairo_surface_t *surface, - cairo_image_surface_t **image_out, - void **image_extra) -{ - cairo_status_t status; - - if (unlikely (surface->status)) - return surface->status; - - assert (!surface->finished); - - if (surface->backend->acquire_source_image == NULL) - return CAIRO_INT_STATUS_UNSUPPORTED; - - status = surface->backend->acquire_source_image (surface, - image_out, image_extra); - if (unlikely (status)) - return _cairo_surface_set_error (surface, status); - - _cairo_debug_check_image_surface_is_defined (&(*image_out)->base); - - return CAIRO_STATUS_SUCCESS; -} - -cairo_status_t -_cairo_surface_default_acquire_source_image (void *_surface, - cairo_image_surface_t **image_out, - void **image_extra) -{ - cairo_surface_t *surface = _surface; - cairo_rectangle_int_t extents; - - if (unlikely (! surface->backend->get_extents (surface, &extents))) - return _cairo_error (CAIRO_STATUS_INVALID_SIZE); - - *image_out = _cairo_surface_map_to_image (surface, &extents); - *image_extra = NULL; - return (*image_out)->base.status; -} - -/** - * _cairo_surface_release_source_image: - * @surface: a #cairo_surface_t - * @image_extra: same as return from the matching _cairo_surface_acquire_source_image() - * - * Releases any resources obtained with _cairo_surface_acquire_source_image() - **/ -void -_cairo_surface_release_source_image (cairo_surface_t *surface, - cairo_image_surface_t *image, - void *image_extra) -{ - assert (!surface->finished); - - if (surface->backend->release_source_image) - surface->backend->release_source_image (surface, image, image_extra); -} - -void -_cairo_surface_default_release_source_image (void *surface, - cairo_image_surface_t *image, - void *image_extra) -{ - cairo_status_t ignored; - - ignored = _cairo_surface_unmap_image (surface, image); - (void)ignored; -} - - -cairo_surface_t * -_cairo_surface_get_source (cairo_surface_t *surface, - cairo_rectangle_int_t *extents) -{ - assert (surface->backend->source); - return surface->backend->source (surface, extents); -} - -cairo_surface_t * -_cairo_surface_default_source (void *surface, - cairo_rectangle_int_t *extents) -{ - if (extents) - _cairo_surface_get_extents(surface, extents); - return surface; -} - -static cairo_status_t -_pattern_has_error (const cairo_pattern_t *pattern) -{ - const cairo_surface_pattern_t *spattern; - - if (unlikely (pattern->status)) - return pattern->status; - - if (pattern->type != CAIRO_PATTERN_TYPE_SURFACE) - return CAIRO_STATUS_SUCCESS; - - spattern = (const cairo_surface_pattern_t *) pattern; - if (unlikely (spattern->surface->status)) - return spattern->surface->status; - - if (unlikely (spattern->surface->finished)) - return _cairo_error (CAIRO_STATUS_SURFACE_FINISHED); - - return CAIRO_STATUS_SUCCESS; -} - -static cairo_bool_t -nothing_to_do (cairo_surface_t *surface, - cairo_operator_t op, - const cairo_pattern_t *source) -{ - if (_cairo_pattern_is_clear (source)) { - if (op == CAIRO_OPERATOR_OVER || op == CAIRO_OPERATOR_ADD) - return TRUE; - - if (op == CAIRO_OPERATOR_SOURCE) - op = CAIRO_OPERATOR_CLEAR; - } - - if (op == CAIRO_OPERATOR_CLEAR && surface->is_clear) - return TRUE; - - if (op == CAIRO_OPERATOR_ATOP && (surface->content & CAIRO_CONTENT_COLOR) ==0) - return TRUE; - - return FALSE; -} - -cairo_status_t -_cairo_surface_paint (cairo_surface_t *surface, - cairo_operator_t op, - const cairo_pattern_t *source, - const cairo_clip_t *clip) -{ - cairo_int_status_t status; - - TRACE ((stderr, "%s\n", __FUNCTION__)); - if (unlikely (surface->status)) - return surface->status; - if (unlikely (surface->finished)) - return _cairo_surface_set_error (surface, _cairo_error (CAIRO_STATUS_SURFACE_FINISHED)); - - if (_cairo_clip_is_all_clipped (clip)) - return CAIRO_STATUS_SUCCESS; - - status = _pattern_has_error (source); - if (unlikely (status)) - return status; - - if (nothing_to_do (surface, op, source)) - return CAIRO_STATUS_SUCCESS; - - status = _cairo_surface_begin_modification (surface); - if (unlikely (status)) - return status; - - status = surface->backend->paint (surface, op, source, clip); - if (status != CAIRO_INT_STATUS_NOTHING_TO_DO) { - surface->is_clear = op == CAIRO_OPERATOR_CLEAR && clip == NULL; - surface->serial++; - } - - return _cairo_surface_set_error (surface, status); -} - -cairo_status_t -_cairo_surface_mask (cairo_surface_t *surface, - cairo_operator_t op, - const cairo_pattern_t *source, - const cairo_pattern_t *mask, - const cairo_clip_t *clip) -{ - cairo_int_status_t status; - - TRACE ((stderr, "%s\n", __FUNCTION__)); - if (unlikely (surface->status)) - return surface->status; - if (unlikely (surface->finished)) - return _cairo_surface_set_error (surface, _cairo_error (CAIRO_STATUS_SURFACE_FINISHED)); - - if (_cairo_clip_is_all_clipped (clip)) - return CAIRO_STATUS_SUCCESS; - - /* If the mask is blank, this is just an expensive no-op */ - if (_cairo_pattern_is_clear (mask) && - _cairo_operator_bounded_by_mask (op)) - { - return CAIRO_STATUS_SUCCESS; - } - - status = _pattern_has_error (source); - if (unlikely (status)) - return status; - - status = _pattern_has_error (mask); - if (unlikely (status)) - return status; - - if (nothing_to_do (surface, op, source)) - return CAIRO_STATUS_SUCCESS; - - status = _cairo_surface_begin_modification (surface); - if (unlikely (status)) - return status; - - status = surface->backend->mask (surface, op, source, mask, clip); - if (status != CAIRO_INT_STATUS_NOTHING_TO_DO) { - surface->is_clear = FALSE; - surface->serial++; - } - - return _cairo_surface_set_error (surface, status); -} - -cairo_status_t -_cairo_surface_fill_stroke (cairo_surface_t *surface, - cairo_operator_t fill_op, - const cairo_pattern_t *fill_source, - cairo_fill_rule_t fill_rule, - double fill_tolerance, - cairo_antialias_t fill_antialias, - cairo_path_fixed_t *path, - cairo_operator_t stroke_op, - const cairo_pattern_t *stroke_source, - const cairo_stroke_style_t *stroke_style, - const cairo_matrix_t *stroke_ctm, - const cairo_matrix_t *stroke_ctm_inverse, - double stroke_tolerance, - cairo_antialias_t stroke_antialias, - const cairo_clip_t *clip) -{ - cairo_int_status_t status; - - TRACE ((stderr, "%s\n", __FUNCTION__)); - if (unlikely (surface->status)) - return surface->status; - if (unlikely (surface->finished)) - return _cairo_surface_set_error (surface, _cairo_error (CAIRO_STATUS_SURFACE_FINISHED)); - - if (_cairo_clip_is_all_clipped (clip)) - return CAIRO_STATUS_SUCCESS; - - if (surface->is_clear && - fill_op == CAIRO_OPERATOR_CLEAR && - stroke_op == CAIRO_OPERATOR_CLEAR) - { - return CAIRO_STATUS_SUCCESS; - } - - status = _pattern_has_error (fill_source); - if (unlikely (status)) - return status; - - status = _pattern_has_error (stroke_source); - if (unlikely (status)) - return status; - - status = _cairo_surface_begin_modification (surface); - if (unlikely (status)) - return status; - - if (surface->backend->fill_stroke) { - cairo_matrix_t dev_ctm = *stroke_ctm; - cairo_matrix_t dev_ctm_inverse = *stroke_ctm_inverse; - - status = surface->backend->fill_stroke (surface, - fill_op, fill_source, fill_rule, - fill_tolerance, fill_antialias, - path, - stroke_op, stroke_source, - stroke_style, - &dev_ctm, &dev_ctm_inverse, - stroke_tolerance, stroke_antialias, - clip); - - if (status != CAIRO_INT_STATUS_UNSUPPORTED) - goto FINISH; - } - - status = _cairo_surface_fill (surface, fill_op, fill_source, path, - fill_rule, fill_tolerance, fill_antialias, - clip); - if (unlikely (status)) - goto FINISH; - - status = _cairo_surface_stroke (surface, stroke_op, stroke_source, path, - stroke_style, stroke_ctm, stroke_ctm_inverse, - stroke_tolerance, stroke_antialias, - clip); - if (unlikely (status)) - goto FINISH; - - FINISH: - if (status != CAIRO_INT_STATUS_NOTHING_TO_DO) { - surface->is_clear = FALSE; - surface->serial++; - } - - return _cairo_surface_set_error (surface, status); -} - -cairo_status_t -_cairo_surface_stroke (cairo_surface_t *surface, - cairo_operator_t op, - const cairo_pattern_t *source, - const cairo_path_fixed_t *path, - const cairo_stroke_style_t *stroke_style, - const cairo_matrix_t *ctm, - const cairo_matrix_t *ctm_inverse, - double tolerance, - cairo_antialias_t antialias, - const cairo_clip_t *clip) -{ - cairo_int_status_t status; - - TRACE ((stderr, "%s\n", __FUNCTION__)); - if (unlikely (surface->status)) - return surface->status; - if (unlikely (surface->finished)) - return _cairo_surface_set_error (surface, _cairo_error (CAIRO_STATUS_SURFACE_FINISHED)); - - if (_cairo_clip_is_all_clipped (clip)) - return CAIRO_STATUS_SUCCESS; - - status = _pattern_has_error (source); - if (unlikely (status)) - return status; - - if (nothing_to_do (surface, op, source)) - return CAIRO_STATUS_SUCCESS; - - status = _cairo_surface_begin_modification (surface); - if (unlikely (status)) - return status; - - status = surface->backend->stroke (surface, op, source, - path, stroke_style, - ctm, ctm_inverse, - tolerance, antialias, - clip); - if (status != CAIRO_INT_STATUS_NOTHING_TO_DO) { - surface->is_clear = FALSE; - surface->serial++; - } - - return _cairo_surface_set_error (surface, status); -} - -cairo_status_t -_cairo_surface_fill (cairo_surface_t *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_int_status_t status; - - TRACE ((stderr, "%s\n", __FUNCTION__)); - if (unlikely (surface->status)) - return surface->status; - if (unlikely (surface->finished)) - return _cairo_surface_set_error (surface, _cairo_error (CAIRO_STATUS_SURFACE_FINISHED)); - - if (_cairo_clip_is_all_clipped (clip)) - return CAIRO_STATUS_SUCCESS; - - status = _pattern_has_error (source); - if (unlikely (status)) - return status; - - if (nothing_to_do (surface, op, source)) - return CAIRO_STATUS_SUCCESS; - - status = _cairo_surface_begin_modification (surface); - if (unlikely (status)) - return status; - - status = surface->backend->fill (surface, op, source, - path, fill_rule, - tolerance, antialias, - clip); - if (status != CAIRO_INT_STATUS_NOTHING_TO_DO) { - surface->is_clear = FALSE; - surface->serial++; - } - - return _cairo_surface_set_error (surface, status); -} - -/** - * cairo_surface_copy_page: - * @surface: a #cairo_surface_t - * - * Emits the current page for backends that support multiple pages, - * but doesn't clear it, so that the contents of the current page will - * be retained for the next page. Use cairo_surface_show_page() if you - * want to get an empty page after the emission. - * - * There is a convenience function for this that takes a #cairo_t, - * namely cairo_copy_page(). - * - * Since: 1.6 - **/ -void -cairo_surface_copy_page (cairo_surface_t *surface) -{ - if (unlikely (surface->status)) - return; - - assert (surface->snapshot_of == NULL); - - if (unlikely (surface->finished)) { - _cairo_surface_set_error (surface, CAIRO_STATUS_SURFACE_FINISHED); - return; - } - - /* It's fine if some backends don't implement copy_page */ - if (surface->backend->copy_page == NULL) - return; - - _cairo_surface_set_error (surface, surface->backend->copy_page (surface)); -} -slim_hidden_def (cairo_surface_copy_page); - -/** - * cairo_surface_show_page: - * @surface: a #cairo_Surface_t - * - * Emits and clears the current page for backends that support multiple - * pages. Use cairo_surface_copy_page() if you don't want to clear the page. - * - * There is a convenience function for this that takes a #cairo_t, - * namely cairo_show_page(). - * - * Since: 1.6 - **/ -void -cairo_surface_show_page (cairo_surface_t *surface) -{ - cairo_status_t status; - - if (unlikely (surface->status)) - return; - - if (unlikely (surface->finished)) { - _cairo_surface_set_error (surface, CAIRO_STATUS_SURFACE_FINISHED); - return; - } - - status = _cairo_surface_begin_modification (surface); - if (unlikely (status)) { - _cairo_surface_set_error (surface, status); - return; - } - - /* It's fine if some backends don't implement show_page */ - if (surface->backend->show_page == NULL) - return; - - _cairo_surface_set_error (surface, surface->backend->show_page (surface)); -} -slim_hidden_def (cairo_surface_show_page); - -/** - * _cairo_surface_get_extents: - * @surface: the #cairo_surface_t to fetch extents for - * - * This function returns a bounding box for the surface. The surface - * bounds are defined as a region beyond which no rendering will - * possibly be recorded, in other words, it is the maximum extent of - * potentially usable coordinates. - * - * For vector surfaces, (PDF, PS, SVG and recording-surfaces), the surface - * might be conceived as unbounded, but we force the user to provide a - * maximum size at the time of surface_create. So get_extents uses - * that size. - * - * Note: The coordinates returned are in "backend" space rather than - * "surface" space. That is, they are relative to the true (0,0) - * origin rather than the device_transform origin. This might seem a - * bit inconsistent with other #cairo_surface_t interfaces, but all - * current callers are within the surface layer where backend space is - * desired. - * - * This behavior would have to be changed is we ever exported a public - * variant of this function. - **/ -cairo_bool_t -_cairo_surface_get_extents (cairo_surface_t *surface, - cairo_rectangle_int_t *extents) -{ - cairo_bool_t bounded; - - if (unlikely (surface->status)) - goto zero_extents; - if (unlikely (surface->finished)) { - _cairo_surface_set_error(surface, CAIRO_STATUS_SURFACE_FINISHED); - goto zero_extents; - } - - bounded = FALSE; - if (surface->backend->get_extents != NULL) - bounded = surface->backend->get_extents (surface, extents); - - if (! bounded) - _cairo_unbounded_rectangle_init (extents); - - return bounded; - -zero_extents: - extents->x = extents->y = 0; - extents->width = extents->height = 0; - return TRUE; -} - -/** - * cairo_surface_has_show_text_glyphs: - * @surface: a #cairo_surface_t - * - * Returns whether the surface supports - * sophisticated cairo_show_text_glyphs() operations. That is, - * whether it actually uses the provided text and cluster data - * to a cairo_show_text_glyphs() call. - * - * Note: Even if this function returns %FALSE, a - * cairo_show_text_glyphs() operation targeted at @surface will - * still succeed. It just will - * act like a cairo_show_glyphs() operation. Users can use this - * function to avoid computing UTF-8 text and cluster mapping if the - * target surface does not use it. - * - * Return value: %TRUE if @surface supports - * cairo_show_text_glyphs(), %FALSE otherwise - * - * Since: 1.8 - **/ -cairo_bool_t -cairo_surface_has_show_text_glyphs (cairo_surface_t *surface) -{ - if (unlikely (surface->status)) - return FALSE; - - if (unlikely (surface->finished)) { - _cairo_surface_set_error (surface, CAIRO_STATUS_SURFACE_FINISHED); - return FALSE; - } - - if (surface->backend->has_show_text_glyphs) - return surface->backend->has_show_text_glyphs (surface); - else - return surface->backend->show_text_glyphs != NULL; -} -slim_hidden_def (cairo_surface_has_show_text_glyphs); - -#define GLYPH_CACHE_SIZE 64 - -static inline cairo_int_status_t -ensure_scaled_glyph (cairo_scaled_font_t *scaled_font, - cairo_scaled_glyph_t **glyph_cache, - cairo_glyph_t *glyph, - cairo_scaled_glyph_t **scaled_glyph) -{ - int cache_index; - cairo_int_status_t status = CAIRO_INT_STATUS_SUCCESS; - - cache_index = glyph->index % GLYPH_CACHE_SIZE; - *scaled_glyph = glyph_cache[cache_index]; - if (*scaled_glyph == NULL || _cairo_scaled_glyph_index (*scaled_glyph) != glyph->index) { - status = _cairo_scaled_glyph_lookup (scaled_font, - glyph->index, - CAIRO_SCALED_GLYPH_INFO_SURFACE, - scaled_glyph); - if (unlikely (status)) - status = _cairo_scaled_font_set_error (scaled_font, status); - - glyph_cache[cache_index] = *scaled_glyph; - } - - return status; -} - -static inline cairo_int_status_t -composite_one_color_glyph (cairo_surface_t *surface, - cairo_operator_t op, - const cairo_pattern_t *source, - const cairo_clip_t *clip, - cairo_glyph_t *glyph, - cairo_scaled_glyph_t *scaled_glyph) -{ - cairo_int_status_t status; - cairo_image_surface_t *glyph_surface; - cairo_pattern_t *pattern; - cairo_matrix_t matrix; - - status = CAIRO_INT_STATUS_SUCCESS; - - glyph_surface = scaled_glyph->color_surface; - - if (glyph_surface->width && glyph_surface->height) { - int x, y; - /* round glyph locations to the nearest pixels */ - /* XXX: FRAGILE: We're ignoring device_transform scaling here. A bug? */ - x = _cairo_lround (glyph->x - glyph_surface->base.device_transform.x0); - y = _cairo_lround (glyph->y - glyph_surface->base.device_transform.y0); - - pattern = cairo_pattern_create_for_surface ((cairo_surface_t *)glyph_surface); - cairo_matrix_init_translate (&matrix, - x, - y); - cairo_pattern_set_matrix (pattern, &matrix); - if (op == CAIRO_OPERATOR_SOURCE || op == CAIRO_OPERATOR_CLEAR) - status = surface->backend->mask (surface, op, pattern, pattern, clip); - else - status = surface->backend->paint (surface, op, pattern, clip); - cairo_pattern_destroy (pattern); - } - - return status; -} - -static cairo_int_status_t -composite_color_glyphs (cairo_surface_t *surface, - cairo_operator_t op, - const cairo_pattern_t *source, - char *utf8, - int *utf8_len, - cairo_glyph_t *glyphs, - int *num_glyphs, - cairo_text_cluster_t *clusters, - int *num_clusters, - cairo_text_cluster_flags_t cluster_flags, - cairo_scaled_font_t *scaled_font, - const cairo_clip_t *clip) -{ - cairo_int_status_t status; - int i, j; - cairo_scaled_glyph_t *scaled_glyph; - int remaining_clusters = 0; - int remaining_glyphs = 0; - int remaining_bytes = 0; - int glyph_pos = 0; - int byte_pos = 0; - int gp; - cairo_scaled_glyph_t *glyph_cache[GLYPH_CACHE_SIZE]; - - memset (glyph_cache, 0, sizeof (glyph_cache)); - - status = CAIRO_INT_STATUS_SUCCESS; - - _cairo_scaled_font_freeze_cache (scaled_font); - - if (clusters) { - - if (cluster_flags & CAIRO_TEXT_CLUSTER_FLAG_BACKWARD) - glyph_pos = *num_glyphs - 1; - - for (i = 0; i < *num_clusters; i++) { - cairo_bool_t skip_cluster = FALSE; - - for (j = 0; j < clusters[i].num_glyphs; j++) { - if (cluster_flags & CAIRO_TEXT_CLUSTER_FLAG_BACKWARD) - gp = glyph_pos - j; - else - gp = glyph_pos + j; - - status = ensure_scaled_glyph (scaled_font, glyph_cache, - &glyphs[gp], &scaled_glyph); - if (unlikely (status)) - goto UNLOCK; - - if ((scaled_glyph->has_info & CAIRO_SCALED_GLYPH_INFO_COLOR_SURFACE) == 0) { - skip_cluster = TRUE; - break; - } - } - - if (skip_cluster) { - memmove (utf8 + remaining_bytes, utf8 + byte_pos, clusters[i].num_bytes); - remaining_bytes += clusters[i].num_bytes; - byte_pos += clusters[i].num_bytes; - for (j = 0; j < clusters[i].num_glyphs; j++, remaining_glyphs++) { - if (cluster_flags & CAIRO_TEXT_CLUSTER_FLAG_BACKWARD) - glyphs[*num_glyphs - 1 - remaining_glyphs] = glyphs[glyph_pos--]; - else - glyphs[remaining_glyphs] = glyphs[glyph_pos++]; - } - clusters[remaining_clusters++] = clusters[i]; - continue; - } - - for (j = 0; j < clusters[i].num_glyphs; j++) { - if (cluster_flags & CAIRO_TEXT_CLUSTER_FLAG_BACKWARD) - gp = glyph_pos - j; - else - gp = glyph_pos + j; - - status = ensure_scaled_glyph (scaled_font, glyph_cache, - &glyphs[gp], &scaled_glyph); - if (unlikely (status)) - goto UNLOCK; - - status = composite_one_color_glyph (surface, op, source, clip, - &glyphs[gp], scaled_glyph); - if (unlikely (status && status != CAIRO_INT_STATUS_NOTHING_TO_DO)) - goto UNLOCK; - } - - if (cluster_flags & CAIRO_TEXT_CLUSTER_FLAG_BACKWARD) - glyph_pos -= clusters[i].num_glyphs; - else - glyph_pos += clusters[i].num_glyphs; - - byte_pos += clusters[i].num_bytes; - } - - if (cluster_flags & CAIRO_TEXT_CLUSTER_FLAG_BACKWARD) - memmove (utf8, utf8 + *utf8_len - remaining_bytes, remaining_bytes); - - *utf8_len = remaining_bytes; - *num_glyphs = remaining_glyphs; - *num_clusters = remaining_clusters; - - } else { - - for (glyph_pos = 0; glyph_pos < *num_glyphs; glyph_pos++) { - status = ensure_scaled_glyph (scaled_font, glyph_cache, - &glyphs[glyph_pos], &scaled_glyph); - if (unlikely (status)) - goto UNLOCK; - - if ((scaled_glyph->has_info & CAIRO_SCALED_GLYPH_INFO_COLOR_SURFACE) == 0) { - glyphs[remaining_glyphs++] = glyphs[glyph_pos]; - continue; - } - - status = composite_one_color_glyph (surface, op, source, clip, - &glyphs[glyph_pos], scaled_glyph); - if (unlikely (status && status != CAIRO_INT_STATUS_NOTHING_TO_DO)) - goto UNLOCK; - } - - *num_glyphs = remaining_glyphs; - } - -UNLOCK: - _cairo_scaled_font_thaw_cache (scaled_font); - - return status; -} - -/* Note: the backends may modify the contents of the glyph array as long as - * they do not return %CAIRO_INT_STATUS_UNSUPPORTED. This makes it possible to - * avoid copying the array again and again, and edit it in-place. - * Backends are in fact free to use the array as a generic buffer as they - * see fit. - * - * For show_glyphs backend method, and NOT for show_text_glyphs method, - * when they do return UNSUPPORTED, they may adjust remaining_glyphs to notify - * that they have successfully rendered some of the glyphs (from the beginning - * of the array), but not all. If they don't touch remaining_glyphs, it - * defaults to all glyphs. - * - * See commits 5a9642c5746fd677aed35ce620ce90b1029b1a0c and - * 1781e6018c17909311295a9cc74b70500c6b4d0a for the rationale. - */ -cairo_status_t -_cairo_surface_show_text_glyphs (cairo_surface_t *surface, - cairo_operator_t op, - const cairo_pattern_t *source, - const char *utf8, - int utf8_len, - cairo_glyph_t *glyphs, - int num_glyphs, - const cairo_text_cluster_t *clusters, - int num_clusters, - cairo_text_cluster_flags_t cluster_flags, - cairo_scaled_font_t *scaled_font, - const cairo_clip_t *clip) -{ - cairo_int_status_t status; - - TRACE ((stderr, "%s\n", __FUNCTION__)); - if (unlikely (surface->status)) - return surface->status; - if (unlikely (surface->finished)) - return _cairo_surface_set_error (surface, _cairo_error (CAIRO_STATUS_SURFACE_FINISHED)); - - if (num_glyphs == 0 && utf8_len == 0) - return CAIRO_STATUS_SUCCESS; - - if (_cairo_clip_is_all_clipped (clip)) - return CAIRO_STATUS_SUCCESS; - - status = _pattern_has_error (source); - if (unlikely (status)) - return status; - - if (nothing_to_do (surface, op, source)) - return CAIRO_STATUS_SUCCESS; - - status = _cairo_surface_begin_modification (surface); - if (unlikely (status)) - return status; - - status = CAIRO_INT_STATUS_UNSUPPORTED; - - if (_cairo_scaled_font_has_color_glyphs (scaled_font)) { - status = composite_color_glyphs (surface, op, - source, - (char *)utf8, &utf8_len, - glyphs, &num_glyphs, - (cairo_text_cluster_t *)clusters, &num_clusters, cluster_flags, - scaled_font, - clip); - - if (unlikely (status && status != CAIRO_INT_STATUS_NOTHING_TO_DO)) - goto DONE; - - if (num_glyphs == 0) - goto DONE; - } - - /* The logic here is duplicated in _cairo_analysis_surface show_glyphs and - * show_text_glyphs. Keep in synch. */ - if (clusters) { - /* A real show_text_glyphs call. Try show_text_glyphs backend - * method first */ - if (surface->backend->show_text_glyphs != NULL) { - status = surface->backend->show_text_glyphs (surface, op, - source, - utf8, utf8_len, - glyphs, num_glyphs, - clusters, num_clusters, cluster_flags, - scaled_font, - clip); - } - if (status == CAIRO_INT_STATUS_UNSUPPORTED && - surface->backend->show_glyphs) - { - status = surface->backend->show_glyphs (surface, op, - source, - glyphs, num_glyphs, - scaled_font, - clip); - } - } else { - /* A mere show_glyphs call. Try show_glyphs backend method first */ - if (surface->backend->show_glyphs != NULL) { - status = surface->backend->show_glyphs (surface, op, - source, - glyphs, num_glyphs, - scaled_font, - clip); - } else if (surface->backend->show_text_glyphs != NULL) { - /* Intentionally only try show_text_glyphs method for show_glyphs - * calls if backend does not have show_glyphs. If backend has - * both methods implemented, we don't fallback from show_glyphs to - * show_text_glyphs, and hence the backend can assume in its - * show_text_glyphs call that clusters is not NULL (which also - * implies that UTF-8 is not NULL, unless the text is - * zero-length). - */ - status = surface->backend->show_text_glyphs (surface, op, - source, - utf8, utf8_len, - glyphs, num_glyphs, - clusters, num_clusters, cluster_flags, - scaled_font, - clip); - } - } - -DONE: - if (status != CAIRO_INT_STATUS_NOTHING_TO_DO) { - surface->is_clear = FALSE; - surface->serial++; - } - - return _cairo_surface_set_error (surface, status); -} - -cairo_status_t -_cairo_surface_tag (cairo_surface_t *surface, - cairo_bool_t begin, - const char *tag_name, - const char *attributes, - const cairo_pattern_t *source, - const cairo_stroke_style_t *stroke_style, - const cairo_matrix_t *ctm, - const cairo_matrix_t *ctm_inverse, - const cairo_clip_t *clip) -{ - cairo_int_status_t status; - - TRACE ((stderr, "%s\n", __FUNCTION__)); - if (unlikely (surface->status)) - return surface->status; - if (unlikely (surface->finished)) - return _cairo_surface_set_error (surface, _cairo_error (CAIRO_STATUS_SURFACE_FINISHED)); - - if (surface->backend->tag == NULL) - return CAIRO_STATUS_SUCCESS; - - if (begin) { - status = _pattern_has_error (source); - if (unlikely (status)) - return status; - } - - status = surface->backend->tag (surface, begin, tag_name, attributes, - source, stroke_style, - ctm, ctm_inverse, clip); - - return _cairo_surface_set_error (surface, status); -} - - -/** - * _cairo_surface_set_resolution: - * @surface: the surface - * @x_res: x resolution, in dpi - * @y_res: y resolution, in dpi - * - * Set the actual surface resolution of @surface to the given x and y DPI. - * Mainly used for correctly computing the scale factor when fallback - * rendering needs to take place in the paginated surface. - **/ -void -_cairo_surface_set_resolution (cairo_surface_t *surface, - double x_res, - double y_res) -{ - if (surface->status) - return; - - surface->x_resolution = x_res; - surface->y_resolution = y_res; -} - -/** - * _cairo_surface_create_in_error: - * @status: the error status - * - * Return an appropriate static error surface for the error status. - * On error, surface creation functions should always return a surface - * created with _cairo_surface_create_in_error() instead of a new surface - * in an error state. This simplifies internal code as no refcounting has - * to be done. - **/ -cairo_surface_t * -_cairo_surface_create_in_error (cairo_status_t status) -{ - assert (status < CAIRO_STATUS_LAST_STATUS); - switch (status) { - case CAIRO_STATUS_NO_MEMORY: - return (cairo_surface_t *) &_cairo_surface_nil; - case CAIRO_STATUS_SURFACE_TYPE_MISMATCH: - return (cairo_surface_t *) &_cairo_surface_nil_surface_type_mismatch; - case CAIRO_STATUS_INVALID_STATUS: - return (cairo_surface_t *) &_cairo_surface_nil_invalid_status; - case CAIRO_STATUS_INVALID_CONTENT: - return (cairo_surface_t *) &_cairo_surface_nil_invalid_content; - case CAIRO_STATUS_INVALID_FORMAT: - return (cairo_surface_t *) &_cairo_surface_nil_invalid_format; - case CAIRO_STATUS_INVALID_VISUAL: - return (cairo_surface_t *) &_cairo_surface_nil_invalid_visual; - case CAIRO_STATUS_READ_ERROR: - return (cairo_surface_t *) &_cairo_surface_nil_read_error; - case CAIRO_STATUS_WRITE_ERROR: - return (cairo_surface_t *) &_cairo_surface_nil_write_error; - case CAIRO_STATUS_FILE_NOT_FOUND: - return (cairo_surface_t *) &_cairo_surface_nil_file_not_found; - case CAIRO_STATUS_TEMP_FILE_ERROR: - return (cairo_surface_t *) &_cairo_surface_nil_temp_file_error; - case CAIRO_STATUS_INVALID_STRIDE: - return (cairo_surface_t *) &_cairo_surface_nil_invalid_stride; - case CAIRO_STATUS_INVALID_SIZE: - return (cairo_surface_t *) &_cairo_surface_nil_invalid_size; - case CAIRO_STATUS_DEVICE_TYPE_MISMATCH: - return (cairo_surface_t *) &_cairo_surface_nil_device_type_mismatch; - case CAIRO_STATUS_DEVICE_ERROR: - return (cairo_surface_t *) &_cairo_surface_nil_device_error; - case CAIRO_STATUS_SUCCESS: - case CAIRO_STATUS_LAST_STATUS: - ASSERT_NOT_REACHED; - /* fall-through */ - case CAIRO_STATUS_INVALID_RESTORE: - case CAIRO_STATUS_INVALID_POP_GROUP: - case CAIRO_STATUS_NO_CURRENT_POINT: - case CAIRO_STATUS_INVALID_MATRIX: - case CAIRO_STATUS_NULL_POINTER: - case CAIRO_STATUS_INVALID_STRING: - case CAIRO_STATUS_INVALID_PATH_DATA: - case CAIRO_STATUS_SURFACE_FINISHED: - case CAIRO_STATUS_PATTERN_TYPE_MISMATCH: - case CAIRO_STATUS_INVALID_DASH: - case CAIRO_STATUS_INVALID_DSC_COMMENT: - case CAIRO_STATUS_INVALID_INDEX: - case CAIRO_STATUS_CLIP_NOT_REPRESENTABLE: - case CAIRO_STATUS_FONT_TYPE_MISMATCH: - case CAIRO_STATUS_USER_FONT_IMMUTABLE: - case CAIRO_STATUS_USER_FONT_ERROR: - case CAIRO_STATUS_NEGATIVE_COUNT: - case CAIRO_STATUS_INVALID_CLUSTERS: - case CAIRO_STATUS_INVALID_SLANT: - case CAIRO_STATUS_INVALID_WEIGHT: - case CAIRO_STATUS_USER_FONT_NOT_IMPLEMENTED: - case CAIRO_STATUS_INVALID_MESH_CONSTRUCTION: - case CAIRO_STATUS_DEVICE_FINISHED: - case CAIRO_STATUS_JBIG2_GLOBAL_MISSING: - case CAIRO_STATUS_PNG_ERROR: - case CAIRO_STATUS_FREETYPE_ERROR: - case CAIRO_STATUS_WIN32_GDI_ERROR: - case CAIRO_STATUS_TAG_ERROR: - default: - _cairo_error_throw (CAIRO_STATUS_NO_MEMORY); - return (cairo_surface_t *) &_cairo_surface_nil; - } -} - -cairo_surface_t * -_cairo_int_surface_create_in_error (cairo_int_status_t status) -{ - if (status < CAIRO_INT_STATUS_LAST_STATUS) - return _cairo_surface_create_in_error (status); - - switch ((int)status) { - case CAIRO_INT_STATUS_UNSUPPORTED: - return (cairo_surface_t *) &_cairo_surface_nil_unsupported; - case CAIRO_INT_STATUS_NOTHING_TO_DO: - return (cairo_surface_t *) &_cairo_surface_nil_nothing_to_do; - default: - _cairo_error_throw (CAIRO_STATUS_NO_MEMORY); - return (cairo_surface_t *) &_cairo_surface_nil; - } -} - -/* LocalWords: rasterized - */ |