/* -*- 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"
/**
* 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 */ \
FALSE , /* permit_subpixel_antialiasing */ \
{ 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 */ \
{ /* font options begin */\
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 */ \
NULL, /* variations */ \
CAIRO_COLOR_MODE_DEFAULT, /* color mode */ \
CAIRO_COLOR_PALETTE_DEFAULT, /* color palette */ \
NULL, 0 , /* custom palette */ \
}, /* font_options end */ \
NULL, /* foreground_source */ \
FALSE , /* foreground_used */ \
}
/* 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_STATUS_PNG_ERROR, _cairo_surface_nil_png_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;
}
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
int 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);
surface->permit_subpixel_antialiasing = TRUE ;
_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 ;
surface->foreground_source = NULL;
surface->foreground_used = 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_font_options_fini (&options);
}
surface->permit_subpixel_antialiasing = other->permit_subpixel_antialiasing;
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;
}
/**
* _ 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;
}
/**
* 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->foreground_source)
cairo_pattern_destroy (surface->foreground_source);
if (surface->owns_device)
cairo_device_destroy (surface->device);
if (surface->has_font_options)
_cairo_font_options_fini (&surface->font_options);
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);
}
/**
* 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 checking status , 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);
}
/**
* _ 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 ;
}
}
}
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_calloc (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;
}
/**
* 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 ;
}
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);
}
/**
* cairo_surface_set_subpixel_antialiasing :
* @ surface : a # cairo_surface_t
*
* Sets whether the surface permits subpixel antialiasing . By default ,
* surfaces permit subpixel antialiasing .
*
* Enabling subpixel antialiasing for CONTENT_COLOR_ALPHA surfaces generally
* requires that the pixels in the areas under a subpixel antialiasing
* operation already be opaque .
**/
void
cairo_surface_set_subpixel_antialiasing (cairo_surface_t *surface,
cairo_subpixel_antialiasing_t enabled)
{
if (surface->status)
return ;
if (surface->finished) {
_cairo_surface_set_error (surface, CAIRO_STATUS_SURFACE_FINISHED);
return ;
}
surface->permit_subpixel_antialiasing =
enabled == CAIRO_SUBPIXEL_ANTIALIASING_ENABLED;
}
/**
* cairo_surface_get_subpixel_antialiasing :
* @ surface : a # cairo_surface_t
*
* Gets whether the surface supports subpixel antialiasing . By default ,
* CAIRO_CONTENT_COLOR surfaces support subpixel antialiasing but other
* surfaces do not .
**/
cairo_subpixel_antialiasing_t
cairo_surface_get_subpixel_antialiasing (cairo_surface_t *surface)
{
if (surface->status)
return CAIRO_SUBPIXEL_ANTIALIASING_DISABLED;
return surface->permit_subpixel_antialiasing ?
CAIRO_SUBPIXEL_ANTIALIASING_ENABLED : CAIRO_SUBPIXEL_ANTIALIASING_DISABLED;
}
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);
}
/**
* 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);
}
/**
* 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);
}
}
/**
* 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_scale ( ) 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);
}
/**
* 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 scale 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;
}
/**
* 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);
}
/**
* 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;
}
/**
* 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 resolution 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;
}
/**
* 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;
cairo_bool_t is_clear;
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;
if (source->is_foreground_marker && surface->foreground_source) {
source = surface->foreground_source;
surface->foreground_used = TRUE ;
}
status = surface->backend->paint (surface, op, source, clip);
is_clear = op == CAIRO_OPERATOR_CLEAR && clip == NULL;
if (status != CAIRO_INT_STATUS_NOTHING_TO_DO || is_clear) {
surface->is_clear = is_clear;
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;
if (source->is_foreground_marker && surface->foreground_source) {
source = surface->foreground_source;
surface->foreground_used = TRUE ;
}
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 (fill_source->is_foreground_marker && surface->foreground_source) {
fill_source = surface->foreground_source;
surface->foreground_used = TRUE ;
}
if (stroke_source->is_foreground_marker && surface->foreground_source) {
stroke_source = surface->foreground_source;
surface->foreground_used = TRUE ;
}
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;
if (source->is_foreground_marker && surface->foreground_source) {
source = surface->foreground_source;
surface->foreground_used = TRUE ;
}
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;
if (source->is_foreground_marker && surface->foreground_source) {
source = surface->foreground_source;
surface->foreground_used = TRUE ;
}
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));
}
/**
* 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));
}
/**
* _ 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;
}
#define GLYPH_CACHE_SIZE 64
static inline cairo_int_status_t
ensure_scaled_glyph (cairo_scaled_font_t *scaled_font,
cairo_color_t *foreground_color,
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_COLOR_SURFACE,
foreground_color,
scaled_glyph);
if (status == CAIRO_INT_STATUS_UNSUPPORTED) {
/* If the color surface not available, ensure scaled_glyph is not NULL. */
status = _cairo_scaled_glyph_lookup (scaled_font,
glyph->index,
CAIRO_SCALED_GLYPH_INFO_SURFACE,
NULL, /* foreground color */
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,
double x_scale,
double y_scale)
{
cairo_int_status_t status;
cairo_image_surface_t *glyph_surface;
cairo_pattern_t *pattern;
cairo_matrix_t matrix;
int has_color;
status = CAIRO_INT_STATUS_SUCCESS;
has_color = scaled_glyph->has_info & CAIRO_SCALED_GLYPH_INFO_COLOR_SURFACE;
if (has_color)
glyph_surface = scaled_glyph->color_surface;
else
glyph_surface = scaled_glyph->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 * x_scale - glyph_surface->base.device_transform.x0);
y = _cairo_lround (glyph->y * y_scale - 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_matrix_scale (&matrix, x_scale, y_scale);
cairo_pattern_set_matrix (pattern, &matrix);
if (op == CAIRO_OPERATOR_SOURCE || op == CAIRO_OPERATOR_CLEAR || !has_color)
status = _cairo_surface_mask (surface, op, pattern, pattern, clip);
else
status = _cairo_surface_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];
cairo_color_t *foreground_color = NULL;
double x_scale = 1 .0 ;
double y_scale = 1 .0 ;
if (surface->is_vector) {
cairo_font_face_t *font_face;
cairo_matrix_t font_matrix;
cairo_matrix_t ctm;
cairo_font_options_t font_options;
x_scale = surface->x_fallback_resolution / surface->x_resolution;
y_scale = surface->y_fallback_resolution / surface->y_resolution;
font_face = cairo_scaled_font_get_font_face (scaled_font);
cairo_scaled_font_get_font_matrix (scaled_font, &font_matrix);
cairo_scaled_font_get_ctm (scaled_font, &ctm);
_cairo_font_options_init_default (&font_options);
cairo_scaled_font_get_font_options (scaled_font, &font_options);
cairo_matrix_scale (&ctm, x_scale, y_scale);
scaled_font = cairo_scaled_font_create (font_face,
&font_matrix,
&ctm,
&font_options);
}
if (source->type == CAIRO_PATTERN_TYPE_SOLID)
foreground_color = &((cairo_solid_pattern_t *) source)->color;
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 = TRUE ;
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, foreground_color, glyph_cache,
&glyphs[gp], &scaled_glyph);
if (unlikely (status))
goto UNLOCK;
if ((scaled_glyph->has_info & CAIRO_SCALED_GLYPH_INFO_COLOR_SURFACE) != 0 ) {
cairo_bool_t supports_color_glyph = FALSE ;
if (surface->backend->supports_color_glyph) {
_cairo_scaled_font_thaw_cache (scaled_font);
supports_color_glyph = _cairo_surface_supports_color_glyph (surface, scaled_font, glyphs[gp].index);
memset (glyph_cache, 0 , sizeof (glyph_cache));
_cairo_scaled_font_freeze_cache (scaled_font);
}
if (!supports_color_glyph) {
skip_cluster = FALSE ;
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, foreground_color, glyph_cache,
&glyphs[gp], &scaled_glyph);
if (unlikely (status))
goto UNLOCK;
status = composite_one_color_glyph (surface, op, source, clip,
&glyphs[gp], scaled_glyph,
x_scale, y_scale);
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);
memmove (glyphs, glyphs + (*num_glyphs - remaining_glyphs), sizeof (cairo_glyph_t) * remaining_glyphs);
}
*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, foreground_color, 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,
x_scale, y_scale);
if (unlikely (status && status != CAIRO_INT_STATUS_NOTHING_TO_DO))
goto UNLOCK;
}
*num_glyphs = remaining_glyphs;
}
UNLOCK:
_cairo_scaled_font_thaw_cache (scaled_font);
if (surface->is_vector)
cairo_scaled_font_destroy (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 5 a9642c5746fd677aed35ce620ce90b1029b1a0c and
* 1781 e6018c17909311295a9cc74b70500c6b4d0a 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;
char *utf8_copy = NULL;
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;
status = cairo_scaled_font_status (scaled_font);
if (unlikely (status))
return status;
if (!(_cairo_scaled_font_has_color_glyphs (scaled_font) &&
scaled_font->options.color_mode != CAIRO_COLOR_MODE_NO_COLOR))
{
if (nothing_to_do (surface, op, source))
return CAIRO_STATUS_SUCCESS;
}
status = _cairo_surface_begin_modification (surface);
if (unlikely (status))
return status;
if (source->is_foreground_marker && surface->foreground_source)
source = surface->foreground_source;
if (_cairo_scaled_font_has_color_glyphs (scaled_font) &&
scaled_font->options.color_mode != CAIRO_COLOR_MODE_NO_COLOR)
{
utf8_copy = malloc (sizeof (char ) * utf8_len);
memcpy (utf8_copy, utf8, sizeof (char ) * utf8_len);
utf8 = utf8_copy;
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;
} else {
utf8_copy = NULL;
}
/* The logic here is duplicated in _cairo_analysis_surface show_glyphs and
* show_text_glyphs. Keep in synch. */
if (clusters) {
status = CAIRO_INT_STATUS_UNSUPPORTED;
/* 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++;
}
if (utf8_copy)
free (utf8_copy);
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)
{
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;
status = surface->backend->tag (surface, begin, tag_name, attributes);
surface->is_clear = FALSE ;
return _cairo_surface_set_error (surface, status);
}
cairo_bool_t
_cairo_surface_supports_color_glyph (cairo_surface_t *surface,
cairo_scaled_font_t *scaled_font,
unsigned long glyph_index)
{
if (surface->backend->supports_color_glyph != NULL)
return surface->backend->supports_color_glyph (surface, scaled_font, glyph_index);
return FALSE ;
}
/**
* _ 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_PNG_ERROR:
return (cairo_surface_t *) &_cairo_surface_nil_png_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_FREETYPE_ERROR:
case CAIRO_STATUS_WIN32_GDI_ERROR:
case CAIRO_INT_STATUS_DWRITE_ERROR:
case CAIRO_STATUS_TAG_ERROR:
case CAIRO_STATUS_SVG_FONT_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
*/
Messung V0.5 in Prozent C=95 H=96 G=95
¤ Dauer der Verarbeitung: 0.92 Sekunden
(vorverarbeitet am 2026-09-29)
¤
*© Formatika GbR, Deutschland