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/* vim: set sw=4 sts=4: -*- Mode: c; tab-width: 8; c-basic-offset: 4; indent-tabs-mode: t; -*- */
/* cairo - a vector graphics library with display and print output
*
* Copyright © 2004 Red Hat, Inc
* Copyright © 2005-2007 Emmanuel Pacaud <emmanuel.pacaud@free.fr>
* Copyright © 2006 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
*
* 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):
* Kristian Høgsberg <krh@redhat.com>
* Emmanuel Pacaud <emmanuel.pacaud@free.fr>
* Carl Worth <cworth@cworth.org>
*/
#define _DEFAULT_SOURCE /* for snprintf() */
#include "cairoint.h"
#include "cairo-svg.h"
#include "cairo-array-private.h"
#include "cairo-analysis-surface-private.h"
#include "cairo-default-context-private.h"
#include "cairo-error-private.h"
#include "cairo-image-info-private.h"
#include "cairo-image-surface-private.h"
#include "cairo-recording-surface-inline.h"
#include "cairo-output-stream-private.h"
#include "cairo-path-fixed-private.h"
#include "cairo-paginated-private.h"
#include "cairo-scaled-font-subsets-private.h"
#include "cairo-surface-clipper-private.h"
#include "cairo-surface-snapshot-inline.h"
#include "cairo-svg-surface-private.h"
/**
* SECTION:cairo-svg
* @Title: SVG Surfaces
* @Short_Description: Rendering SVG documents
* @See_Also: #cairo_surface_t
*
* The SVG surface is used to render cairo graphics to
* SVG files and is a multi-page vector surface backend.
**/
/**
* CAIRO_HAS_SVG_SURFACE:
*
* Defined if the SVG surface backend is available.
* This macro can be used to conditionally compile backend-specific code.
*
* Since: 1.2
**/
typedef struct cairo_svg_page cairo_svg_page_t;
static const int invalid_pattern_id = -1;
static const cairo_svg_version_t _cairo_svg_versions[] =
{
CAIRO_SVG_VERSION_1_1,
CAIRO_SVG_VERSION_1_2
};
#define CAIRO_SVG_VERSION_LAST ARRAY_LENGTH (_cairo_svg_versions)
static const char *_cairo_svg_supported_mime_types[] =
{
CAIRO_MIME_TYPE_JPEG,
CAIRO_MIME_TYPE_PNG,
CAIRO_MIME_TYPE_UNIQUE_ID,
CAIRO_MIME_TYPE_URI,
NULL
};
static void
_cairo_svg_surface_emit_path (cairo_output_stream_t *output,
const cairo_path_fixed_t *path,
const cairo_matrix_t *ctm_inverse);
static cairo_bool_t
_cairo_svg_version_has_page_set_support (cairo_svg_version_t version)
{
return version > CAIRO_SVG_VERSION_1_1;
}
static const char * _cairo_svg_version_strings[CAIRO_SVG_VERSION_LAST] =
{
"SVG 1.1",
"SVG 1.2"
};
static const char * _cairo_svg_internal_version_strings[CAIRO_SVG_VERSION_LAST] =
{
"1.1",
"1.2"
};
static const char * _cairo_svg_unit_strings[] =
{
"",
"em",
"ex",
"px",
"in",
"cm",
"mm",
"pt",
"pc",
"%"
};
struct cairo_svg_page {
unsigned int surface_id;
unsigned int clip_level;
cairo_output_stream_t *xml_node;
};
struct cairo_svg_document {
cairo_output_stream_t *output_stream;
unsigned long refcount;
cairo_surface_t *owner;
cairo_bool_t finished;
double width;
double height;
cairo_svg_unit_t unit;
cairo_output_stream_t *xml_node_defs;
cairo_output_stream_t *xml_node_glyphs;
unsigned int linear_pattern_id;
unsigned int radial_pattern_id;
unsigned int pattern_id;
unsigned int filter_id;
unsigned int clip_id;
unsigned int mask_id;
cairo_bool_t alpha_filter;
cairo_svg_version_t svg_version;
cairo_scaled_font_subsets_t *font_subsets;
};
static cairo_status_t
_cairo_svg_document_create (cairo_output_stream_t *stream,
double width,
double height,
cairo_svg_version_t version,
cairo_svg_document_t **document_out);
static cairo_status_t
_cairo_svg_document_destroy (cairo_svg_document_t *document);
static cairo_status_t
_cairo_svg_document_finish (cairo_svg_document_t *document);
static cairo_svg_document_t *
_cairo_svg_document_reference (cairo_svg_document_t *document);
static unsigned int
_cairo_svg_document_allocate_mask_id (cairo_svg_document_t *document);
static cairo_surface_t *
_cairo_svg_surface_create_for_document (cairo_svg_document_t *document,
cairo_content_t content,
double width,
double height,
cairo_bool_t bounded);
static cairo_surface_t *
_cairo_svg_surface_create_for_stream_internal (cairo_output_stream_t *stream,
double width,
double height,
cairo_svg_version_t version);
static const cairo_surface_backend_t cairo_svg_surface_backend;
static const cairo_paginated_surface_backend_t cairo_svg_surface_paginated_backend;
/**
* cairo_svg_surface_create_for_stream:
* @write_func: a #cairo_write_func_t to accept the output data, may be %NULL
* to indicate a no-op @write_func. With a no-op @write_func,
* the surface may be queried or used as a source without
* generating any temporary files.
* @closure: the closure argument for @write_func
* @width_in_points: width of the surface, in points (1 point == 1/72.0 inch)
* @height_in_points: height of the surface, in points (1 point == 1/72.0 inch)
*
* Creates a SVG surface of the specified size in points to be written
* incrementally to the stream represented by @write_func and @closure.
*
* Return value: a pointer to the newly created surface. The caller
* owns the surface and should call cairo_surface_destroy() when done
* with it.
*
* This function always returns a valid pointer, but it will return a
* pointer to a "nil" surface if an error such as out of memory
* occurs. You can use cairo_surface_status() to check for this.
*
* Since: 1.2
**/
cairo_surface_t *
cairo_svg_surface_create_for_stream (cairo_write_func_t write_func,
void *closure,
double width,
double height)
{
cairo_output_stream_t *stream;
stream = _cairo_output_stream_create (write_func, NULL, closure);
if (_cairo_output_stream_get_status (stream))
return _cairo_surface_create_in_error (_cairo_output_stream_destroy (stream));
return _cairo_svg_surface_create_for_stream_internal (stream, width, height, CAIRO_SVG_VERSION_1_1);
}
/**
* cairo_svg_surface_create:
* @filename: a filename for the SVG output (must be writable), %NULL may be
* used to specify no output. This will generate a SVG surface that
* may be queried and used as a source, without generating a
* temporary file.
* @width_in_points: width of the surface, in points (1 point == 1/72.0 inch)
* @height_in_points: height of the surface, in points (1 point == 1/72.0 inch)
*
* Creates a SVG surface of the specified size in points to be written
* to @filename.
*
* The SVG surface backend recognizes the following MIME types for the
* data attached to a surface (see cairo_surface_set_mime_data()) when
* it is used as a source pattern for drawing on this surface:
* %CAIRO_MIME_TYPE_JPEG, %CAIRO_MIME_TYPE_PNG,
* %CAIRO_MIME_TYPE_URI. If any of them is specified, the SVG backend
* emits a href with the content of MIME data instead of a surface
* snapshot (PNG, Base64-encoded) in the corresponding image tag.
*
* The unofficial MIME type %CAIRO_MIME_TYPE_URI is examined
* first. If present, the URI is emitted as is: assuring the
* correctness of URI is left to the client code.
*
* If %CAIRO_MIME_TYPE_URI is not present, but %CAIRO_MIME_TYPE_JPEG
* or %CAIRO_MIME_TYPE_PNG is specified, the corresponding data is
* Base64-encoded and emitted.
*
* If %CAIRO_MIME_TYPE_UNIQUE_ID is present, all surfaces with the same
* unique identifier will only be embedded once.
*
* Return value: a pointer to the newly created surface. The caller
* owns the surface and should call cairo_surface_destroy() when done
* with it.
*
* This function always returns a valid pointer, but it will return a
* pointer to a "nil" surface if an error such as out of memory
* occurs. You can use cairo_surface_status() to check for this.
*
* Since: 1.2
**/
cairo_surface_t *
cairo_svg_surface_create (const char *filename,
double width,
double height)
{
cairo_output_stream_t *stream;
stream = _cairo_output_stream_create_for_filename (filename);
if (_cairo_output_stream_get_status (stream))
return _cairo_surface_create_in_error (_cairo_output_stream_destroy (stream));
return _cairo_svg_surface_create_for_stream_internal (stream, width, height, CAIRO_SVG_VERSION_1_1);
}
static cairo_bool_t
_cairo_surface_is_svg (cairo_surface_t *surface)
{
return surface->backend == &cairo_svg_surface_backend;
}
/* If the abstract_surface is a paginated surface, and that paginated
* surface's target is a svg_surface, then set svg_surface to that
* target. Otherwise return FALSE.
*/
static cairo_bool_t
_extract_svg_surface (cairo_surface_t *surface,
cairo_svg_surface_t **svg_surface)
{
cairo_surface_t *target;
cairo_status_t status_ignored;
if (surface->status)
return FALSE;
if (surface->finished) {
status_ignored = _cairo_surface_set_error (surface,
_cairo_error (CAIRO_STATUS_SURFACE_FINISHED));
return FALSE;
}
if (! _cairo_surface_is_paginated (surface)) {
status_ignored = _cairo_surface_set_error (surface,
_cairo_error (CAIRO_STATUS_SURFACE_TYPE_MISMATCH));
return FALSE;
}
target = _cairo_paginated_surface_get_target (surface);
if (target->status) {
status_ignored = _cairo_surface_set_error (surface,
target->status);
return FALSE;
}
if (target->finished) {
status_ignored = _cairo_surface_set_error (surface,
_cairo_error (CAIRO_STATUS_SURFACE_FINISHED));
return FALSE;
}
if (! _cairo_surface_is_svg (target)) {
status_ignored = _cairo_surface_set_error (surface,
_cairo_error (CAIRO_STATUS_SURFACE_TYPE_MISMATCH));
return FALSE;
}
*svg_surface = (cairo_svg_surface_t *) target;
return TRUE;
}
/**
* cairo_svg_surface_restrict_to_version:
* @surface: a SVG #cairo_surface_t
* @version: SVG version
*
* Restricts the generated SVG file to @version. See cairo_svg_get_versions()
* for a list of available version values that can be used here.
*
* This function should only be called before any drawing operations
* have been performed on the given surface. The simplest way to do
* this is to call this function immediately after creating the
* surface.
*
* Since: 1.2
**/
void
cairo_svg_surface_restrict_to_version (cairo_surface_t *abstract_surface,
cairo_svg_version_t version)
{
cairo_svg_surface_t *surface = NULL; /* hide compiler warning */
if (! _extract_svg_surface (abstract_surface, &surface))
return;
if (version < CAIRO_SVG_VERSION_LAST)
surface->document->svg_version = version;
}
/**
* cairo_svg_get_versions:
* @versions: supported version list
* @num_versions: list length
*
* Used to retrieve the list of supported versions. See
* cairo_svg_surface_restrict_to_version().
*
* Since: 1.2
**/
void
cairo_svg_get_versions (cairo_svg_version_t const **versions,
int *num_versions)
{
if (versions != NULL)
*versions = _cairo_svg_versions;
if (num_versions != NULL)
*num_versions = CAIRO_SVG_VERSION_LAST;
}
/**
* cairo_svg_version_to_string:
* @version: a version id
*
* Get the string representation of the given @version id. This function
* will return %NULL if @version isn't valid. See cairo_svg_get_versions()
* for a way to get the list of valid version ids.
*
* Return value: the string associated to given version.
*
* Since: 1.2
**/
const char *
cairo_svg_version_to_string (cairo_svg_version_t version)
{
if (version >= CAIRO_SVG_VERSION_LAST)
return NULL;
return _cairo_svg_version_strings[version];
}
/**
* cairo_svg_surface_set_document_unit:
* @surface: a SVG #cairo_surface_t
* @unit: SVG unit
*
* Use the specified unit for the width and height of the generated SVG file.
* See #cairo_svg_unit_t for a list of available unit values that can be used
* here.
*
* This function can be called at any time before generating the SVG file.
*
* However to minimize the risk of ambiguities it's recommended to call it
* before any drawing operations have been performed on the given surface, to
* make it clearer what the unit used in the drawing operations is.
*
* The simplest way to do this is to call this function immediately after
* creating the SVG surface.
*
* Note if this function is never called, the default unit for SVG documents
* generated by cairo will be "pt". This is for historical reasons.
*
* Since: 1.16
**/
void
cairo_svg_surface_set_document_unit (cairo_surface_t *abstract_surface,
cairo_svg_unit_t unit)
{
cairo_svg_surface_t *surface = NULL; /* hide compiler warning */
if (! _extract_svg_surface (abstract_surface, &surface))
return;
if (unit <= CAIRO_SVG_UNIT_PERCENT)
surface->document->unit = unit;
}
/**
* cairo_svg_surface_get_document_unit:
* @surface: a SVG #cairo_surface_t
*
* Get the unit of the SVG surface.
*
* If the surface passed as an argument is not a SVG surface, the function
* sets the error status to CAIRO_STATUS_SURFACE_TYPE_MISMATCH and returns
* CAIRO_SVG_UNIT_USER.
*
* Return value: the SVG unit of the SVG surface.
*
* Since: 1.16
**/
cairo_svg_unit_t
cairo_svg_surface_get_document_unit (cairo_surface_t *abstract_surface)
{
cairo_svg_surface_t *surface = NULL; /* hide compiler warning */
if (! _extract_svg_surface (abstract_surface, &surface)) {
_cairo_error_throw (CAIRO_STATUS_SURFACE_TYPE_MISMATCH);
return CAIRO_SVG_UNIT_USER;
}
return surface->document->unit;
}
static void
_cairo_svg_source_surface_init_key (cairo_svg_source_surface_t *key)
{
if (key->unique_id && key->unique_id_length > 0) {
key->base.hash = _cairo_hash_bytes (_CAIRO_HASH_INIT_VALUE,
key->unique_id, key->unique_id_length);
} else {
key->base.hash = key->id;
}
}
static cairo_bool_t
_cairo_svg_source_surface_equal (const void *key_a, const void *key_b)
{
const cairo_svg_source_surface_t *a = key_a;
const cairo_svg_source_surface_t *b = key_b;
if (a->unique_id && b->unique_id && a->unique_id_length == b->unique_id_length)
return (memcmp (a->unique_id, b->unique_id, a->unique_id_length) == 0);
return (a->id == b->id);
}
static void
_cairo_svg_source_surface_pluck (void *entry, void *closure)
{
cairo_svg_source_surface_t *surface_entry = entry;
cairo_hash_table_t *patterns = closure;
_cairo_hash_table_remove (patterns, &surface_entry->base);
free (surface_entry->unique_id);
free (surface_entry);
}
static cairo_status_t
_cairo_svg_surface_add_source_surface (cairo_svg_surface_t *surface,
cairo_surface_t *source_surface,
int *source_id,
cairo_bool_t *is_new)
{
cairo_svg_source_surface_t source_key;
cairo_svg_source_surface_t *source_entry;
unsigned char *unique_id = NULL;
unsigned long unique_id_length = 0;
cairo_status_t status;
source_key.id = source_surface->unique_id;
cairo_surface_get_mime_data (source_surface, CAIRO_MIME_TYPE_UNIQUE_ID,
(const unsigned char **) &source_key.unique_id,
&source_key.unique_id_length);
_cairo_svg_source_surface_init_key (&source_key);
source_entry = _cairo_hash_table_lookup (surface->source_surfaces, &source_key.base);
if (source_entry) {
*source_id = source_entry->id;
*is_new = FALSE;
return CAIRO_STATUS_SUCCESS;
}
if (source_key.unique_id && source_key.unique_id_length > 0) {
unique_id = _cairo_malloc (source_key.unique_id_length);
if (unique_id == NULL) {
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
unique_id_length = source_key.unique_id_length;
memcpy (unique_id, source_key.unique_id, unique_id_length);
} else {
unique_id = NULL;
unique_id_length = 0;
}
source_entry = malloc (sizeof (cairo_svg_source_surface_t));
if (source_entry == NULL) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto fail;
}
source_entry->id = source_key.id;
source_entry->unique_id_length = unique_id_length;
source_entry->unique_id = unique_id;
_cairo_svg_source_surface_init_key (source_entry);
status = _cairo_hash_table_insert (surface->source_surfaces, &source_entry->base);
if (unlikely(status))
goto fail;
*is_new = TRUE;
*source_id = source_entry->id;
return CAIRO_STATUS_SUCCESS;
fail:
free (unique_id);
free (source_entry);
return status;
}
static cairo_bool_t
_cliprect_covers_surface (cairo_svg_surface_t *surface,
cairo_path_fixed_t *path)
{
cairo_box_t box;
if (_cairo_path_fixed_is_box (path, &box)) {
if (box.p1.x <= 0 &&
box.p1.y <= 0 &&
_cairo_fixed_to_double (box.p2.x) >= surface->width &&
_cairo_fixed_to_double (box.p2.y) >= surface->height)
{
return TRUE;
}
}
return FALSE;
}
static cairo_status_t
_cairo_svg_surface_clipper_intersect_clip_path (cairo_surface_clipper_t *clipper,
cairo_path_fixed_t *path,
cairo_fill_rule_t fill_rule,
double tolerance,
cairo_antialias_t antialias)
{
cairo_svg_surface_t *surface = cairo_container_of (clipper,
cairo_svg_surface_t,
clipper);
cairo_svg_document_t *document = surface->document;
unsigned int i;
if (path == NULL) {
for (i = 0; i < surface->clip_level; i++)
_cairo_output_stream_printf (surface->xml_node, "</g>\n");
surface->clip_level = 0;
return CAIRO_STATUS_SUCCESS;
}
/* skip trivial whole-page clips */
if (_cliprect_covers_surface (surface, path))
return CAIRO_STATUS_SUCCESS;
_cairo_output_stream_printf (document->xml_node_defs,
"<clipPath id=\"clip%d\">\n"
" <path ",
document->clip_id);
_cairo_svg_surface_emit_path (document->xml_node_defs, path, NULL);
_cairo_output_stream_printf (document->xml_node_defs,
"/>\n"
"</clipPath>\n");
_cairo_output_stream_printf (surface->xml_node,
"<g clip-path=\"url(#clip%d)\" "
"clip-rule=\"%s\">\n",
document->clip_id,
fill_rule == CAIRO_FILL_RULE_EVEN_ODD ?
"evenodd" : "nonzero");
document->clip_id++;
surface->clip_level++;
return CAIRO_STATUS_SUCCESS;
}
static cairo_surface_t *
_cairo_svg_surface_create_for_document (cairo_svg_document_t *document,
cairo_content_t content,
double width,
double height,
cairo_bool_t bounded)
{
cairo_svg_surface_t *surface;
cairo_surface_t *paginated;
cairo_status_t status, status_ignored;
surface = _cairo_malloc (sizeof (cairo_svg_surface_t));
if (unlikely (surface == NULL))
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
_cairo_surface_init (&surface->base,
&cairo_svg_surface_backend,
NULL, /* device */
content,
TRUE); /* is_vector */
surface->width = width;
surface->height = height;
surface->surface_bounded = bounded;
surface->document = _cairo_svg_document_reference (document);
surface->clip_level = 0;
_cairo_surface_clipper_init (&surface->clipper,
_cairo_svg_surface_clipper_intersect_clip_path);
surface->base_clip = document->clip_id++;
surface->is_base_clip_emitted = FALSE;
surface->xml_node = _cairo_memory_stream_create ();
status = _cairo_output_stream_get_status (surface->xml_node);
if (unlikely (status))
goto CLEANUP;
_cairo_array_init (&surface->page_set, sizeof (cairo_svg_page_t));
if (content == CAIRO_CONTENT_COLOR) {
_cairo_output_stream_printf (surface->xml_node,
"<rect width=\"%f\" height=\"%f\" "
"style=\"opacity:1;stroke:none;"
"fill:rgb(0,0,0);\"/>\n",
width, height);
status = _cairo_output_stream_get_status (surface->xml_node);
if (unlikely (status))
goto CLEANUP;
}
surface->paginated_mode = CAIRO_PAGINATED_MODE_ANALYZE;
surface->force_fallbacks = FALSE;
surface->content = content;
surface->source_surfaces = _cairo_hash_table_create (_cairo_svg_source_surface_equal);
if (unlikely (surface->source_surfaces == NULL)) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto CLEANUP;
}
paginated = _cairo_paginated_surface_create (&surface->base,
surface->content,
&cairo_svg_surface_paginated_backend);
status = paginated->status;
if (status == CAIRO_STATUS_SUCCESS) {
/* paginated keeps the only reference to surface now, drop ours */
cairo_surface_destroy (&surface->base);
return paginated;
}
/* ignore status as we are on the error path */
CLEANUP:
status_ignored = _cairo_output_stream_destroy (surface->xml_node);
status_ignored = _cairo_svg_document_destroy (document);
free (surface);
return _cairo_surface_create_in_error (status);
}
static cairo_surface_t *
_cairo_svg_surface_create_for_stream_internal (cairo_output_stream_t *stream,
double width,
double height,
cairo_svg_version_t version)
{
cairo_svg_document_t *document = NULL; /* silence compiler */
cairo_surface_t *surface;
cairo_status_t status;
status = _cairo_svg_document_create (stream,
width, height, version,
&document);
if (unlikely (status)) {
surface = _cairo_surface_create_in_error (status);
/* consume the output stream on behalf of caller */
status = _cairo_output_stream_destroy (stream);
return surface;
}
surface = _cairo_svg_surface_create_for_document (document, CAIRO_CONTENT_COLOR_ALPHA,
width, height, TRUE);
if (surface->status) {
status = _cairo_svg_document_destroy (document);
return surface;
}
document->owner = surface;
status = _cairo_svg_document_destroy (document);
/* the ref count should be 2 at this point */
assert (status == CAIRO_STATUS_SUCCESS);
return surface;
}
static cairo_svg_page_t *
_cairo_svg_surface_store_page (cairo_svg_surface_t *surface)
{
cairo_svg_page_t page;
cairo_output_stream_t *stream;
cairo_int_status_t status;
unsigned int i;
stream = _cairo_memory_stream_create ();
if (_cairo_output_stream_get_status (stream)) {
status = _cairo_output_stream_destroy (stream);
return NULL;
}
page.surface_id = surface->base.unique_id;
page.clip_level = surface->clip_level;
page.xml_node = surface->xml_node;
if (_cairo_array_append (&surface->page_set, &page)) {
status = _cairo_output_stream_destroy (stream);
return NULL;
}
surface->xml_node = stream;
surface->clip_level = 0;
for (i = 0; i < page.clip_level; i++)
_cairo_output_stream_printf (page.xml_node, "</g>\n");
_cairo_surface_clipper_reset (&surface->clipper);
return _cairo_array_index (&surface->page_set,
surface->page_set.num_elements - 1);
}
static cairo_int_status_t
_cairo_svg_surface_copy_page (void *abstract_surface)
{
cairo_svg_surface_t *surface = abstract_surface;
cairo_svg_page_t *page;
page = _cairo_svg_surface_store_page (surface);
if (unlikely (page == NULL))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
_cairo_memory_stream_copy (page->xml_node, surface->xml_node);
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
_cairo_svg_surface_show_page (void *abstract_surface)
{
cairo_svg_surface_t *surface = abstract_surface;
if (unlikely (_cairo_svg_surface_store_page (surface) == NULL))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
return CAIRO_STATUS_SUCCESS;
}
static void
_cairo_svg_surface_emit_transform (cairo_output_stream_t *output,
char const *attribute_str,
const cairo_matrix_t *object_matrix,
const cairo_matrix_t *parent_matrix)
{
cairo_matrix_t matrix = *object_matrix;
if (parent_matrix != NULL)
cairo_matrix_multiply (&matrix, &matrix, parent_matrix);
if (!_cairo_matrix_is_identity (&matrix))
_cairo_output_stream_printf (output,
"%s=\"matrix(%f,%f,%f,%f,%f,%f)\"",
attribute_str,
matrix.xx, matrix.yx,
matrix.xy, matrix.yy,
matrix.x0, matrix.y0);
}
typedef struct {
cairo_output_stream_t *output;
const cairo_matrix_t *ctm_inverse;
} svg_path_info_t;
static cairo_status_t
_cairo_svg_path_move_to (void *closure,
const cairo_point_t *point)
{
svg_path_info_t *info = closure;
double x = _cairo_fixed_to_double (point->x);
double y = _cairo_fixed_to_double (point->y);
if (info->ctm_inverse)
cairo_matrix_transform_point (info->ctm_inverse, &x, &y);
_cairo_output_stream_printf (info->output, "M %f %f ", x, y);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cairo_svg_path_line_to (void *closure,
const cairo_point_t *point)
{
svg_path_info_t *info = closure;
double x = _cairo_fixed_to_double (point->x);
double y = _cairo_fixed_to_double (point->y);
if (info->ctm_inverse)
cairo_matrix_transform_point (info->ctm_inverse, &x, &y);
_cairo_output_stream_printf (info->output, "L %f %f ", x, y);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cairo_svg_path_curve_to (void *closure,
const cairo_point_t *b,
const cairo_point_t *c,
const cairo_point_t *d)
{
svg_path_info_t *info = closure;
double bx = _cairo_fixed_to_double (b->x);
double by = _cairo_fixed_to_double (b->y);
double cx = _cairo_fixed_to_double (c->x);
double cy = _cairo_fixed_to_double (c->y);
double dx = _cairo_fixed_to_double (d->x);
double dy = _cairo_fixed_to_double (d->y);
if (info->ctm_inverse) {
cairo_matrix_transform_point (info->ctm_inverse, &bx, &by);
cairo_matrix_transform_point (info->ctm_inverse, &cx, &cy);
cairo_matrix_transform_point (info->ctm_inverse, &dx, &dy);
}
_cairo_output_stream_printf (info->output,
"C %f %f %f %f %f %f ",
bx, by, cx, cy, dx, dy);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cairo_svg_path_close_path (void *closure)
{
svg_path_info_t *info = closure;
_cairo_output_stream_printf (info->output, "Z ");
return CAIRO_STATUS_SUCCESS;
}
static void
_cairo_svg_surface_emit_path (cairo_output_stream_t *output,
const cairo_path_fixed_t *path,
const cairo_matrix_t *ctm_inverse)
{
cairo_status_t status;
svg_path_info_t info;
_cairo_output_stream_printf (output, "d=\"");
info.output = output;
info.ctm_inverse = ctm_inverse;
status = _cairo_path_fixed_interpret (path,
_cairo_svg_path_move_to,
_cairo_svg_path_line_to,
_cairo_svg_path_curve_to,
_cairo_svg_path_close_path,
&info);
assert (status == CAIRO_STATUS_SUCCESS);
_cairo_output_stream_printf (output, "\"");
}
static cairo_int_status_t
_cairo_svg_document_emit_outline_glyph_data (cairo_svg_document_t *document,
cairo_scaled_font_t *scaled_font,
unsigned long glyph_index)
{
cairo_scaled_glyph_t *scaled_glyph;
cairo_int_status_t status;
status = _cairo_scaled_glyph_lookup (scaled_font,
glyph_index,
CAIRO_SCALED_GLYPH_INFO_METRICS|
CAIRO_SCALED_GLYPH_INFO_PATH,
&scaled_glyph);
if (unlikely (status))
return status;
_cairo_output_stream_printf (document->xml_node_glyphs,
"<path style=\"stroke:none;\" ");
_cairo_svg_surface_emit_path (document->xml_node_glyphs,
scaled_glyph->path, NULL);
_cairo_output_stream_printf (document->xml_node_glyphs,
"/>\n");
return status;
}
static cairo_int_status_t
_cairo_svg_document_emit_bitmap_glyph_data (cairo_svg_document_t *document,
cairo_scaled_font_t *scaled_font,
unsigned long glyph_index)
{
cairo_scaled_glyph_t *scaled_glyph;
cairo_image_surface_t *image;
cairo_status_t status;
uint8_t *row, *byte;
int rows, cols;
int x, y, bit;
status = _cairo_scaled_glyph_lookup (scaled_font,
glyph_index,
CAIRO_SCALED_GLYPH_INFO_METRICS |
CAIRO_SCALED_GLYPH_INFO_SURFACE,
&scaled_glyph);
if (unlikely (status))
return status;
image = _cairo_image_surface_coerce_to_format (scaled_glyph->surface,
CAIRO_FORMAT_A1);
status = image->base.status;
if (unlikely (status))
return status;
_cairo_output_stream_printf (document->xml_node_glyphs, "<g");
_cairo_svg_surface_emit_transform (document->xml_node_glyphs, " transform",
&image->base.device_transform_inverse, NULL);
_cairo_output_stream_printf (document->xml_node_glyphs, ">\n");
for (y = 0, row = image->data, rows = image->height; rows; row += image->stride, rows--, y++) {
for (x = 0, byte = row, cols = (image->width + 7) / 8; cols; byte++, cols--) {
uint8_t output_byte = CAIRO_BITSWAP8_IF_LITTLE_ENDIAN (*byte);
for (bit = 7; bit >= 0 && x < image->width; bit--, x++) {
if (output_byte & (1 << bit)) {
_cairo_output_stream_printf (document->xml_node_glyphs,
"<rect x=\"%d\" y=\"%d\" width=\"1\" height=\"1\"/>\n",
x, y);
}
}
}
}
_cairo_output_stream_printf (document->xml_node_glyphs, "</g>\n");
cairo_surface_destroy (&image->base);
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
_cairo_svg_document_emit_glyph (cairo_svg_document_t *document,
cairo_scaled_font_t *scaled_font,
unsigned long scaled_font_glyph_index,
unsigned int font_id,
unsigned int subset_glyph_index)
{
cairo_int_status_t status;
_cairo_output_stream_printf (document->xml_node_glyphs,
"<symbol overflow=\"visible\" id=\"glyph%d-%d\">\n",
font_id,
subset_glyph_index);
status = _cairo_svg_document_emit_outline_glyph_data (document,
scaled_font,
scaled_font_glyph_index);
if (status == CAIRO_INT_STATUS_UNSUPPORTED)
status = _cairo_svg_document_emit_bitmap_glyph_data (document,
scaled_font,
scaled_font_glyph_index);
if (unlikely (status))
return status;
_cairo_output_stream_printf (document->xml_node_glyphs, "</symbol>\n");
return CAIRO_INT_STATUS_SUCCESS;
}
static cairo_int_status_t
_cairo_svg_document_emit_font_subset (cairo_scaled_font_subset_t *font_subset,
void *closure)
{
cairo_svg_document_t *document = closure;
cairo_int_status_t status = CAIRO_INT_STATUS_SUCCESS;
unsigned int i;
_cairo_scaled_font_freeze_cache (font_subset->scaled_font);
for (i = 0; i < font_subset->num_glyphs; i++) {
status = _cairo_svg_document_emit_glyph (document,
font_subset->scaled_font,
font_subset->glyphs[i],
font_subset->font_id, i);
if (unlikely (status))
break;
}
_cairo_scaled_font_thaw_cache (font_subset->scaled_font);
return status;
}
static cairo_status_t
_cairo_svg_document_emit_font_subsets (cairo_svg_document_t *document)
{
cairo_status_t status;
status = _cairo_scaled_font_subsets_foreach_scaled (document->font_subsets,
_cairo_svg_document_emit_font_subset,
document);
if (unlikely (status))
goto FAIL;
status = _cairo_scaled_font_subsets_foreach_user (document->font_subsets,
_cairo_svg_document_emit_font_subset,
document);
FAIL:
_cairo_scaled_font_subsets_destroy (document->font_subsets);
document->font_subsets = NULL;
return status;
}
static char const *
_cairo_svg_surface_operators[] = {
"clear",
"src", "src-over", "src-in",
"src-out", "src-atop",
"dst", "dst-over", "dst-in",
"dst-out", "dst-atop",
"xor", "plus",
"color-dodge", /* FIXME: saturate ? */
"multiply", "screen", "overlay",
"darken", "lighten",
"color-dodge", "color-burn",
"hard-light", "soft-light",
"difference", "exclusion"
};
static cairo_bool_t
_cairo_svg_surface_analyze_operator (cairo_svg_surface_t *surface,
cairo_operator_t op)
{
/* guard against newly added operators */
if (op >= ARRAY_LENGTH (_cairo_svg_surface_operators))
return CAIRO_INT_STATUS_UNSUPPORTED;
/* allow operators being NULL if they are unsupported */
if (_cairo_svg_surface_operators[op] == NULL)
return CAIRO_INT_STATUS_UNSUPPORTED;
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
_cairo_svg_surface_analyze_operation (cairo_svg_surface_t *surface,
cairo_operator_t op,
const cairo_pattern_t *pattern)
{
cairo_svg_document_t *document = surface->document;
if (surface->force_fallbacks &&
surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE)
{
return CAIRO_INT_STATUS_UNSUPPORTED;
}
if (pattern->type == CAIRO_PATTERN_TYPE_MESH)
return CAIRO_INT_STATUS_UNSUPPORTED;
/* SVG doesn't support extend reflect for image pattern */
if (pattern->type == CAIRO_PATTERN_TYPE_SURFACE &&
pattern->extend == CAIRO_EXTEND_REFLECT)
return CAIRO_INT_STATUS_UNSUPPORTED;
if (document->svg_version >= CAIRO_SVG_VERSION_1_2)
return _cairo_svg_surface_analyze_operator (surface, op);
if (op == CAIRO_OPERATOR_OVER)
return CAIRO_STATUS_SUCCESS;
/* The SOURCE operator is only supported if there is nothing
* painted underneath. */
if (op == CAIRO_OPERATOR_SOURCE)
return CAIRO_INT_STATUS_FLATTEN_TRANSPARENCY;
return CAIRO_INT_STATUS_UNSUPPORTED;
}
static cairo_int_status_t
_cairo_svg_surface_operation_supported (cairo_svg_surface_t *surface,
cairo_operator_t op,
const cairo_pattern_t *pattern)
{
return _cairo_svg_surface_analyze_operation (surface, op, pattern) != CAIRO_INT_STATUS_UNSUPPORTED;
}
static cairo_status_t
_cairo_svg_surface_finish (void *abstract_surface)
{
cairo_status_t status, status2;
cairo_svg_surface_t *surface = abstract_surface;
cairo_svg_document_t *document = surface->document;
cairo_svg_page_t *page;
unsigned int i;
if (_cairo_paginated_surface_get_target (document->owner) == &surface->base)
status = _cairo_svg_document_finish (document);
else
status = CAIRO_STATUS_SUCCESS;
if (surface->xml_node != NULL) {
status2 = _cairo_output_stream_destroy (surface->xml_node);
if (status == CAIRO_STATUS_SUCCESS)
status = status2;
}
for (i = 0; i < surface->page_set.num_elements; i++) {
page = _cairo_array_index (&surface->page_set, i);
status2 = _cairo_output_stream_destroy (page->xml_node);
if (status == CAIRO_STATUS_SUCCESS)
status = status2;
}
_cairo_array_fini (&surface->page_set);
_cairo_surface_clipper_reset (&surface->clipper);
_cairo_hash_table_foreach (surface->source_surfaces,
_cairo_svg_source_surface_pluck,
surface->source_surfaces);
_cairo_hash_table_destroy (surface->source_surfaces);
status2 = _cairo_svg_document_destroy (document);
if (status == CAIRO_STATUS_SUCCESS)
status = status2;
return status;
}
static void
_cairo_svg_surface_emit_alpha_filter (cairo_svg_document_t *document)
{
if (document->alpha_filter)
return;
_cairo_output_stream_printf (document->xml_node_defs,
"<filter id=\"alpha\" "
"filterUnits=\"objectBoundingBox\" "
"x=\"0%%\" y=\"0%%\" "
"width=\"100%%\" height=\"100%%\">\n"
" <feColorMatrix type=\"matrix\" "
"in=\"SourceGraphic\" "
"values=\"0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 1 0\"/>\n"
"</filter>\n");
document->alpha_filter = TRUE;
}
typedef struct {
cairo_output_stream_t *output;
unsigned int in_mem;
unsigned int trailing;
unsigned char src[3];
} base64_write_closure_t;
static char const base64_table[64] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
static cairo_status_t
base64_write_func (void *closure,
const unsigned char *data,
unsigned int length)
{
base64_write_closure_t *info = (base64_write_closure_t *) closure;
unsigned int i;
unsigned char *src;
src = info->src;
if (info->in_mem + length < 3) {
for (i = 0; i < length; i++) {
src[i + info->in_mem] = *data++;
}
info->in_mem += length;
return CAIRO_STATUS_SUCCESS;
}
do {
unsigned char dst[4];
for (i = info->in_mem; i < 3; i++) {
src[i] = *data++;
length--;
}
info->in_mem = 0;
dst[0] = base64_table[src[0] >> 2];
dst[1] = base64_table[(src[0] & 0x03) << 4 | src[1] >> 4];
dst[2] = base64_table[(src[1] & 0x0f) << 2 | src[2] >> 6];
dst[3] = base64_table[src[2] & 0xfc >> 2];
/* Special case for the last missing bits */
switch (info->trailing) {
case 2:
dst[2] = '=';
/* fall through */
case 1:
dst[3] = '=';
default:
break;
}
_cairo_output_stream_write (info->output, dst, 4);
} while (length >= 3);
for (i = 0; i < length; i++) {
src[i] = *data++;
}
info->in_mem = length;
return _cairo_output_stream_get_status (info->output);
}
static cairo_int_status_t
_cairo_surface_base64_encode_jpeg (cairo_surface_t *surface,
cairo_output_stream_t *output)
{
const unsigned char *mime_data;
unsigned long mime_data_length;
cairo_image_info_t image_info;
base64_write_closure_t info;
cairo_status_t status;
cairo_surface_get_mime_data (surface, CAIRO_MIME_TYPE_JPEG,
&mime_data, &mime_data_length);
if (mime_data == NULL)
return CAIRO_INT_STATUS_UNSUPPORTED;
status = _cairo_image_info_get_jpeg_info (&image_info, mime_data, mime_data_length);
if (unlikely (status))
return status;
if (image_info.num_components == 4)
return CAIRO_INT_STATUS_UNSUPPORTED;
_cairo_output_stream_printf (output, "data:image/jpeg;base64,");
info.output = output;
info.in_mem = 0;
info.trailing = 0;
status = base64_write_func (&info, mime_data, mime_data_length);
if (unlikely (status))
return status;
if (info.in_mem > 0) {
memset (info.src + info.in_mem, 0, 3 - info.in_mem);
info.trailing = 3 - info.in_mem;
info.in_mem = 3;
status = base64_write_func (&info, NULL, 0);
}
return status;
}
static cairo_int_status_t
_cairo_surface_base64_encode_png (cairo_surface_t *surface,
cairo_output_stream_t *output)
{
const unsigned char *mime_data;
unsigned long mime_data_length;
base64_write_closure_t info;
cairo_status_t status;
cairo_surface_get_mime_data (surface, CAIRO_MIME_TYPE_PNG,
&mime_data, &mime_data_length);
if (unlikely (surface->status))
return surface->status;
if (mime_data == NULL)
return CAIRO_INT_STATUS_UNSUPPORTED;
_cairo_output_stream_printf (output, "data:image/png;base64,");
info.output = output;
info.in_mem = 0;
info.trailing = 0;
status = base64_write_func (&info, mime_data, mime_data_length);
if (unlikely (status))
return status;
if (info.in_mem > 0) {
memset (info.src + info.in_mem, 0, 3 - info.in_mem);
info.trailing = 3 - info.in_mem;
info.in_mem = 3;
status = base64_write_func (&info, NULL, 0);
}
return status;
}
static cairo_int_status_t
_cairo_surface_base64_encode (cairo_surface_t *surface,
cairo_output_stream_t *output)
{
cairo_int_status_t status;
base64_write_closure_t info;
status = _cairo_surface_base64_encode_jpeg (surface, output);
if (status != CAIRO_INT_STATUS_UNSUPPORTED)
return status;
status = _cairo_surface_base64_encode_png (surface, output);
if (status != CAIRO_INT_STATUS_UNSUPPORTED)
return status;
info.output = output;
info.in_mem = 0;
info.trailing = 0;
_cairo_output_stream_printf (info.output, "data:image/png;base64,");
status = cairo_surface_write_to_png_stream (surface, base64_write_func,
(void *) &info);
if (unlikely (status))
return status;
if (info.in_mem > 0) {
memset (info.src + info.in_mem, 0, 3 - info.in_mem);
info.trailing = 3 - info.in_mem;
info.in_mem = 3;
status = base64_write_func (&info, NULL, 0);
}
return status;
}
static void
_cairo_svg_surface_emit_operator (cairo_output_stream_t *output,
cairo_svg_surface_t *surface,
cairo_operator_t op)
{
if (surface->document->svg_version >= CAIRO_SVG_VERSION_1_2 &&
op != CAIRO_OPERATOR_OVER) {
_cairo_output_stream_printf (output, " comp-op=\"%s\"", _cairo_svg_surface_operators[op]);
if (!_cairo_operator_bounded_by_source (op))
_cairo_output_stream_printf (output, " clip-to-self=\"true\"");
}
}
static void
_cairo_svg_surface_emit_operator_for_style (cairo_output_stream_t *output,
cairo_svg_surface_t *surface,
cairo_operator_t op)
{
if (surface->document->svg_version >= CAIRO_SVG_VERSION_1_2 &&
op != CAIRO_OPERATOR_OVER) {
_cairo_output_stream_printf (output, "comp-op:%s;", _cairo_svg_surface_operators[op]);
if (!_cairo_operator_bounded_by_source (op))
_cairo_output_stream_printf (output, "clip-to-self:true;");
}
}
/**
* _cairo_svg_surface_emit_attr_value:
*
* Write the value to output the stream as a sequence of characters,
* while escaping those which have special meaning in the XML
* attribute's value context: & and ".
**/
static void
_cairo_svg_surface_emit_attr_value (cairo_output_stream_t *stream,
const unsigned char *value,
unsigned int length)
{
const unsigned char *p;
const unsigned char *q;
unsigned int i;
/* we'll accumulate non-special chars in [q, p) range */
p = value;
q = p;
for (i = 0; i < length; i++, p++) {
if (*p == '&' || *p == '"') {
/* flush what's left before special char */
if (p != q) {
_cairo_output_stream_write (stream, q, p - q);
q = p + 1;
}
if (*p == '&')
_cairo_output_stream_printf (stream, "&");
else // p == '"'
_cairo_output_stream_printf (stream, """);
}
}
/* flush the trailing chars if any */
if (p != q)
_cairo_output_stream_write (stream, q, p - q);
}
static cairo_status_t
_cairo_svg_surface_emit_surface (cairo_svg_document_t *document,
cairo_surface_t *surface,
int source_id)
{
cairo_rectangle_int_t extents;
cairo_bool_t is_bounded;
cairo_status_t status;
const unsigned char *uri;
unsigned long uri_len;
is_bounded = _cairo_surface_get_extents (surface, &extents);
assert (is_bounded);
_cairo_output_stream_printf (document->xml_node_defs,
"<image id=\"image%d\" width=\"%d\" height=\"%d\"",
source_id,
extents.width, extents.height);
_cairo_output_stream_printf (document->xml_node_defs, " xlink:href=\"");
cairo_surface_get_mime_data (surface, CAIRO_MIME_TYPE_URI,
&uri, &uri_len);
if (uri != NULL) {
_cairo_svg_surface_emit_attr_value (document->xml_node_defs,
uri, uri_len);
} else {
status = _cairo_surface_base64_encode (surface,
document->xml_node_defs);
if (unlikely (status))
return status;
}
_cairo_output_stream_printf (document->xml_node_defs, "\"/>\n");
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cairo_svg_surface_emit_composite_surface_pattern (cairo_output_stream_t *output,
cairo_svg_surface_t *svg_surface,
cairo_operator_t op,
cairo_surface_pattern_t *pattern,
int pattern_id,
const cairo_matrix_t *parent_matrix,
const char *extra_attributes)
{
cairo_status_t status;
cairo_matrix_t p2u;
int source_id;
cairo_bool_t is_new;
p2u = pattern->base.matrix;
status = cairo_matrix_invert (&p2u);
/* cairo_pattern_set_matrix ensures the matrix is invertible */
assert (status == CAIRO_STATUS_SUCCESS);
status = _cairo_svg_surface_add_source_surface (svg_surface,
pattern->surface,
&source_id,
&is_new);
if (unlikely (status))
return status;
if (is_new) {
status = _cairo_svg_surface_emit_surface (svg_surface->document,
pattern->surface,
source_id);
if (unlikely (status))
return status;
}
if (pattern_id != invalid_pattern_id) {
cairo_rectangle_int_t extents;
cairo_bool_t is_bounded;
is_bounded = _cairo_surface_get_extents (pattern->surface, &extents);
assert (is_bounded);
_cairo_output_stream_printf (output,
"<pattern id=\"pattern%d\" "
"patternUnits=\"userSpaceOnUse\" "
"width=\"%d\" height=\"%d\" ",
pattern_id,
extents.width, extents.height);
_cairo_svg_surface_emit_transform (output,
" patternTransform",
&p2u, parent_matrix);
_cairo_output_stream_printf (output, ">\n ");
}
_cairo_output_stream_printf (output,
"<use xlink:href=\"#image%d\"",
source_id);
if (extra_attributes)
_cairo_output_stream_printf (output, " %s", extra_attributes);
if (pattern_id == invalid_pattern_id) {
_cairo_svg_surface_emit_operator (output, svg_surface, op);
_cairo_svg_surface_emit_transform (output,
" transform",
&p2u, parent_matrix);
}
_cairo_output_stream_printf (output, "/>\n");
if (pattern_id != invalid_pattern_id)
_cairo_output_stream_printf (output, "</pattern>\n");
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cairo_svg_surface_emit_recording_surface (cairo_svg_document_t *document,
cairo_recording_surface_t *source,
int source_id)
{
cairo_status_t status;
cairo_surface_t *paginated_surface;
cairo_svg_surface_t *svg_surface;
cairo_array_t *page_set;
cairo_rectangle_int_t extents;
cairo_bool_t bounded;
cairo_output_stream_t *contents;
bounded = _cairo_surface_get_extents (&source->base, &extents);
paginated_surface = _cairo_svg_surface_create_for_document (document,
source->base.content,
extents.width,
extents.height,
bounded);
if (unlikely (paginated_surface->status))
return paginated_surface->status;
svg_surface = (cairo_svg_surface_t *)
_cairo_paginated_surface_get_target (paginated_surface);
cairo_surface_set_fallback_resolution (paginated_surface,
document->owner->x_fallback_resolution,
document->owner->y_fallback_resolution);
cairo_surface_set_device_offset (&svg_surface->base,
-source->extents_pixels.x,
-source->extents_pixels.y);
status = _cairo_recording_surface_replay (&source->base, paginated_surface);
if (unlikely (status)) {
cairo_surface_destroy (paginated_surface);
return status;
}
cairo_surface_show_page (paginated_surface);
status = cairo_surface_status (paginated_surface);
if (unlikely (status)) {
cairo_surface_destroy (paginated_surface);
return status;
}
if (! svg_surface->is_base_clip_emitted) {
svg_surface->is_base_clip_emitted = TRUE;
if (_cairo_surface_get_extents (&svg_surface->base, &extents)) {
_cairo_output_stream_printf (document->xml_node_defs,
"<clipPath id=\"clip%d\">\n"
" <rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\"/>\n"
"</clipPath>\n",
svg_surface->base_clip,
extents.x,
extents.y,
extents.width,
extents.height);
}
}
if (source->base.content == CAIRO_CONTENT_ALPHA) {
_cairo_svg_surface_emit_alpha_filter (document);
_cairo_output_stream_printf (document->xml_node_defs,
"<g id=\"surface%d\" "
"clip-path=\"url(#clip%d)\" "
"filter=\"url(#alpha)\">\n",
source_id,
svg_surface->base_clip);
} else {
_cairo_output_stream_printf (document->xml_node_defs,
"<g id=\"surface%d\" "
"clip-path=\"url(#clip%d)\">\n",
source_id,
svg_surface->base_clip);
}
contents = svg_surface->xml_node;
page_set = &svg_surface->page_set;
if (_cairo_memory_stream_length (contents) > 0) {
if (unlikely (_cairo_svg_surface_store_page (svg_surface) == NULL)) {
cairo_surface_destroy (paginated_surface);
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
}
if (page_set->num_elements > 0) {
cairo_svg_page_t *page;
page = _cairo_array_index (page_set, page_set->num_elements - 1);
_cairo_memory_stream_copy (page->xml_node, document->xml_node_defs);
}
_cairo_output_stream_printf (document->xml_node_defs, "</g>\n");
status = cairo_surface_status (paginated_surface);
cairo_surface_destroy (paginated_surface);
return status;
}
static cairo_recording_surface_t *
to_recording_surface (const cairo_surface_pattern_t *pattern)
{
cairo_surface_t *surface = pattern->surface;
if (_cairo_surface_is_paginated (surface))
surface = _cairo_paginated_surface_get_recording (surface);
if (_cairo_surface_is_snapshot (surface))
surface = _cairo_surface_snapshot_get_target (surface);
return (cairo_recording_surface_t *) surface;
}
static cairo_status_t
_cairo_svg_surface_emit_composite_recording_pattern (cairo_output_stream_t *output,
cairo_svg_surface_t *surface,
cairo_operator_t op,
cairo_surface_pattern_t *pattern,
int pattern_id,
const cairo_matrix_t *parent_matrix,
const char *extra_attributes)
{
cairo_svg_document_t *document = surface->document;
cairo_recording_surface_t *recording_surface;
cairo_matrix_t p2u;
cairo_status_t status;
int source_id;
cairo_bool_t is_new;
p2u = pattern->base.matrix;
status = cairo_matrix_invert (&p2u);
/* cairo_pattern_set_matrix ensures the matrix is invertible */
assert (status == CAIRO_STATUS_SUCCESS);
status = _cairo_svg_surface_add_source_surface (surface,
pattern->surface,
&source_id,
&is_new);
if (unlikely (status))
return status;
recording_surface = to_recording_surface (pattern);
if (is_new) {
status = _cairo_svg_surface_emit_recording_surface (document, recording_surface, source_id);
if (unlikely (status))
return status;
}
if (pattern_id != invalid_pattern_id) {
_cairo_output_stream_printf (output,
"<pattern id=\"pattern%d\" "
"patternUnits=\"userSpaceOnUse\" "
"width=\"%d\" height=\"%d\"",
pattern_id,
recording_surface->extents.width,
recording_surface->extents.height);
_cairo_svg_surface_emit_transform (output, " patternTransform", &p2u, parent_matrix);
_cairo_output_stream_printf (output, ">\n");
}
_cairo_output_stream_printf (output,
"<use xlink:href=\"#surface%d\"",
source_id);
if (pattern_id == invalid_pattern_id) {
_cairo_svg_surface_emit_operator (output, surface, op);
_cairo_svg_surface_emit_transform (output, " transform", &p2u, parent_matrix);
}
if (extra_attributes)
_cairo_output_stream_printf (output, " %s", extra_attributes);
_cairo_output_stream_printf (output, "/>\n");
if (pattern_id != invalid_pattern_id)
_cairo_output_stream_printf (output, "</pattern>\n");
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cairo_svg_surface_emit_composite_pattern (cairo_output_stream_t *output,
cairo_svg_surface_t *surface,
cairo_operator_t op,
cairo_surface_pattern_t *pattern,
int pattern_id,
const cairo_matrix_t *parent_matrix,
const char *extra_attributes)
{
if (pattern->surface->type == CAIRO_SURFACE_TYPE_RECORDING) {
return _cairo_svg_surface_emit_composite_recording_pattern (output, surface,
op, pattern,
pattern_id,
parent_matrix,
extra_attributes);
}
return _cairo_svg_surface_emit_composite_surface_pattern (output, surface,
op, pattern,
pattern_id,
parent_matrix,
extra_attributes);
}
static cairo_status_t
_cairo_svg_surface_emit_solid_pattern (cairo_svg_surface_t *surface,
cairo_solid_pattern_t *pattern,
cairo_output_stream_t *style,
cairo_bool_t is_stroke)
{
_cairo_output_stream_printf (style, is_stroke ?
"stroke:rgb(%f%%,%f%%,%f%%);stroke-opacity:%f;":
"fill:rgb(%f%%,%f%%,%f%%);fill-opacity:%f;",
pattern->color.red * 100.0,
pattern->color.green * 100.0,
pattern->color.blue * 100.0,
pattern->color.alpha);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cairo_svg_surface_emit_surface_pattern (cairo_svg_surface_t *surface,
cairo_surface_pattern_t *pattern,
cairo_output_stream_t *style,
cairo_bool_t is_stroke,
const cairo_matrix_t *parent_matrix)
{
cairo_svg_document_t *document = surface->document;
cairo_status_t status;
int pattern_id;
pattern_id = document->pattern_id++;
status = _cairo_svg_surface_emit_composite_pattern (document->xml_node_defs,
surface, CAIRO_OPERATOR_SOURCE, pattern,
pattern_id, parent_matrix, NULL);
if (unlikely (status))
return status;
_cairo_output_stream_printf (style,
"%s:url(#pattern%d);",
is_stroke ? "stroke" : "fill",
pattern_id);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cairo_svg_surface_emit_pattern_stops (cairo_output_stream_t *output,
cairo_gradient_pattern_t const *pattern,
double start_offset,
cairo_bool_t reverse_stops,
cairo_bool_t emulate_reflect)
{
cairo_gradient_stop_t *stops;
double offset;
unsigned int n_stops;
unsigned int i;
if (pattern->n_stops < 1)
return CAIRO_STATUS_SUCCESS;
if (pattern->n_stops == 1) {
_cairo_output_stream_printf (output,
"<stop offset=\"%f\" style=\""
"stop-color:rgb(%f%%,%f%%,%f%%);"
"stop-opacity:%f;\"/>\n",
pattern->stops[0].offset,
pattern->stops[0].color.red * 100.0,
pattern->stops[0].color.green * 100.0,
pattern->stops[0].color.blue * 100.0,
pattern->stops[0].color.alpha);
return CAIRO_STATUS_SUCCESS;
}
if (emulate_reflect || reverse_stops) {
n_stops = emulate_reflect ? pattern->n_stops * 2 - 2: pattern->n_stops;
stops = _cairo_malloc_ab (n_stops, sizeof (cairo_gradient_stop_t));
if (unlikely (stops == NULL))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
for (i = 0; i < pattern->n_stops; i++) {
if (reverse_stops) {
stops[i] = pattern->stops[pattern->n_stops - i - 1];
stops[i].offset = 1.0 - stops[i].offset;
} else
stops[i] = pattern->stops[i];
if (emulate_reflect) {
stops[i].offset /= 2;
if (i > 0 && i < (pattern->n_stops - 1)) {
if (reverse_stops) {
stops[i + pattern->n_stops - 1] = pattern->stops[i];
stops[i + pattern->n_stops - 1].offset =
0.5 + 0.5 * stops[i + pattern->n_stops - 1].offset;
} else {
stops[i + pattern->n_stops - 1] = pattern->stops[pattern->n_stops - i - 1];
stops[i + pattern->n_stops - 1].offset =
1 - 0.5 * stops[i + pattern->n_stops - 1].offset;
}
}
}
}
} else {
n_stops = pattern->n_stops;
stops = pattern->stops;
}
if (start_offset >= 0.0)
for (i = 0; i < n_stops; i++) {
offset = start_offset + (1 - start_offset ) * stops[i].offset;
_cairo_output_stream_printf (output,
"<stop offset=\"%f\" style=\""
"stop-color:rgb(%f%%,%f%%,%f%%);"
"stop-opacity:%f;\"/>\n",
offset,
stops[i].color.red * 100.0,
stops[i].color.green * 100.0,
stops[i].color.blue * 100.0,
stops[i].color.alpha);
}
else {
cairo_bool_t found = FALSE;
unsigned int offset_index;
cairo_color_stop_t offset_color_start, offset_color_stop;
for (i = 0; i < n_stops; i++) {
if (stops[i].offset >= -start_offset) {
if (i > 0) {
if (stops[i].offset != stops[i-1].offset) {
double x0, x1;
cairo_color_stop_t *color0, *color1;
x0 = stops[i-1].offset;
x1 = stops[i].offset;
color0 = &stops[i-1].color;
color1 = &stops[i].color;
offset_color_start.red = color0->red + (color1->red - color0->red)
* (-start_offset - x0) / (x1 - x0);
offset_color_start.green = color0->green + (color1->green - color0->green)
* (-start_offset - x0) / (x1 - x0);
offset_color_start.blue = color0->blue + (color1->blue - color0->blue)
* (-start_offset - x0) / (x1 - x0);
offset_color_start.alpha = color0->alpha + (color1->alpha - color0->alpha)
* (-start_offset - x0) / (x1 - x0);
offset_color_stop = offset_color_start;
} else {
offset_color_stop = stops[i-1].color;
offset_color_start = stops[i].color;
}
} else
offset_color_stop = offset_color_start = stops[i].color;
offset_index = i;
found = TRUE;
break;
}
}
if (!found) {
offset_index = n_stops - 1;
offset_color_stop = offset_color_start = stops[offset_index].color;
}
_cairo_output_stream_printf (output,
"<stop offset=\"0\" style=\""
"stop-color:rgb(%f%%,%f%%,%f%%);"
"stop-opacity:%f;\"/>\n",
offset_color_start.red * 100.0,
offset_color_start.green * 100.0,
offset_color_start.blue * 100.0,
offset_color_start.alpha);
for (i = offset_index; i < n_stops; i++) {
_cairo_output_stream_printf (output,
"<stop offset=\"%f\" style=\""
"stop-color:rgb(%f%%,%f%%,%f%%);"
"stop-opacity:%f;\"/>\n",
stops[i].offset + start_offset,
stops[i].color.red * 100.0,
stops[i].color.green * 100.0,
stops[i].color.blue * 100.0,
stops[i].color.alpha);
}
for (i = 0; i < offset_index; i++) {
_cairo_output_stream_printf (output,
"<stop offset=\"%f\" style=\""
"stop-color:rgb(%f%%,%f%%,%f%%);"
"stop-opacity:%f;\"/>\n",
1.0 + stops[i].offset + start_offset,
stops[i].color.red * 100.0,
stops[i].color.green * 100.0,
stops[i].color.blue * 100.0,
stops[i].color.alpha);
}
_cairo_output_stream_printf (output,
"<stop offset=\"1\" style=\""
"stop-color:rgb(%f%%,%f%%,%f%%);"
"stop-opacity:%f;\"/>\n",
offset_color_stop.red * 100.0,
offset_color_stop.green * 100.0,
offset_color_stop.blue * 100.0,
offset_color_stop.alpha);
}
if (reverse_stops || emulate_reflect)
free (stops);
return CAIRO_STATUS_SUCCESS;
}
static void
_cairo_svg_surface_emit_pattern_extend (cairo_output_stream_t *output,
cairo_pattern_t *pattern)
{
switch (pattern->extend) {
case CAIRO_EXTEND_REPEAT:
_cairo_output_stream_printf (output, "spreadMethod=\"repeat\" ");
break;
case CAIRO_EXTEND_REFLECT:
_cairo_output_stream_printf (output, "spreadMethod=\"reflect\" ");
break;
case CAIRO_EXTEND_NONE:
case CAIRO_EXTEND_PAD:
break;
}
}
static cairo_status_t
_cairo_svg_surface_emit_linear_pattern (cairo_svg_surface_t *surface,
cairo_linear_pattern_t *pattern,
cairo_output_stream_t *style,
cairo_bool_t is_stroke,
const cairo_matrix_t *parent_matrix)
{
cairo_svg_document_t *document = surface->document;
cairo_matrix_t p2u;
cairo_status_t status;
p2u = pattern->base.base.matrix;
status = cairo_matrix_invert (&p2u);
/* cairo_pattern_set_matrix ensures the matrix is invertible */
assert (status == CAIRO_STATUS_SUCCESS);
_cairo_output_stream_printf (document->xml_node_defs,
"<linearGradient id=\"linear%d\" "
"gradientUnits=\"userSpaceOnUse\" "
"x1=\"%f\" y1=\"%f\" x2=\"%f\" y2=\"%f\" ",
document->linear_pattern_id,
pattern->pd1.x, pattern->pd1.y,
pattern->pd2.x, pattern->pd2.y);
_cairo_svg_surface_emit_pattern_extend (document->xml_node_defs, &pattern->base.base),
_cairo_svg_surface_emit_transform (document->xml_node_defs, "gradientTransform", &p2u, parent_matrix);
_cairo_output_stream_printf (document->xml_node_defs, ">\n");
status = _cairo_svg_surface_emit_pattern_stops (document->xml_node_defs,
&pattern->base, 0.0,
FALSE, FALSE);
if (unlikely (status))
return status;
_cairo_output_stream_printf (document->xml_node_defs,
"</linearGradient>\n");
_cairo_output_stream_printf (style,
"%s:url(#linear%d);",
is_stroke ? "stroke" : "fill",
document->linear_pattern_id);
document->linear_pattern_id++;
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cairo_svg_surface_emit_radial_pattern (cairo_svg_surface_t *surface,
cairo_radial_pattern_t *pattern,
cairo_output_stream_t *style,
cairo_bool_t is_stroke,
const cairo_matrix_t *parent_matrix)
{
cairo_svg_document_t *document = surface->document;
cairo_matrix_t p2u;
cairo_extend_t extend;
double x0, y0, x1, y1, r0, r1;
double fx, fy;
cairo_bool_t reverse_stops;
cairo_status_t status;
cairo_circle_double_t *c0, *c1;
extend = pattern->base.base.extend;
if (pattern->cd1.radius < pattern->cd2.radius) {
c0 = &pattern->cd1;
c1 = &pattern->cd2;
reverse_stops = FALSE;
} else {
c0 = &pattern->cd2;
c1 = &pattern->cd1;
reverse_stops = TRUE;
}
x0 = c0->center.x;
y0 = c0->center.y;
r0 = c0->radius;
x1 = c1->center.x;
y1 = c1->center.y;
r1 = c1->radius;
p2u = pattern->base.base.matrix;
status = cairo_matrix_invert (&p2u);
/* cairo_pattern_set_matrix ensures the matrix is invertible */
assert (status == CAIRO_STATUS_SUCCESS);
if (r0 == r1) {
unsigned int n_stops = pattern->base.n_stops;
_cairo_output_stream_printf (document->xml_node_defs,
"<radialGradient id=\"radial%d\" "
"gradientUnits=\"userSpaceOnUse\" "
"cx=\"%f\" cy=\"%f\" "
"fx=\"%f\" fy=\"%f\" r=\"%f\" ",
document->radial_pattern_id,
x1, y1,
x1, y1, r1);
_cairo_svg_surface_emit_transform (document->xml_node_defs,
"gradientTransform",
&p2u, parent_matrix);
_cairo_output_stream_printf (document->xml_node_defs, ">\n");
if (extend == CAIRO_EXTEND_NONE || n_stops < 1)
_cairo_output_stream_printf (document->xml_node_defs,
"<stop offset=\"0\" style=\""
"stop-color:rgb(0%%,0%%,0%%);"
"stop-opacity:0;\"/>\n");
else {
_cairo_output_stream_printf (document->xml_node_defs,
"<stop offset=\"0\" style=\""
"stop-color:rgb(%f%%,%f%%,%f%%);"
"stop-opacity %f;\"/>\n",
pattern->base.stops[0].color.red * 100.0,
pattern->base.stops[0].color.green * 100.0,
pattern->base.stops[0].color.blue * 100.0,
pattern->base.stops[0].color.alpha);
if (n_stops > 1)
_cairo_output_stream_printf (document->xml_node_defs,
"<stop offset=\"0\" style=\""
"stop-color:rgb(%f%%,%f%%,%f%%);"
"stop-opacity:%f;\"/>\n",
pattern->base.stops[n_stops - 1].color.red * 100.0,
pattern->base.stops[n_stops - 1].color.green * 100.0,
pattern->base.stops[n_stops - 1].color.blue * 100.0,
pattern->base.stops[n_stops - 1].color.alpha);
}
} else {
double offset, r, x, y;
cairo_bool_t emulate_reflect = FALSE;
fx = (r1 * x0 - r0 * x1) / (r1 - r0);
fy = (r1 * y0 - r0 * y1) / (r1 - r0);
/* SVG doesn't support the inner circle and use instead a gradient focal.
* That means we need to emulate the cairo behaviour by processing the
* cairo gradient stops.
* The CAIRO_EXTENT_NONE and CAIRO_EXTENT_PAD modes are quite easy to handle,
* it's just a matter of stop position translation and calculation of
* the corresponding SVG radial gradient focal.
* The CAIRO_EXTENT_REFLECT and CAIRO_EXTEND_REPEAT modes require to compute a new
* radial gradient, with an new outer circle, equal to r1 - r0 in the CAIRO_EXTEND_REPEAT
* case, and 2 * (r1 - r0) in the CAIRO_EXTENT_REFLECT case, and a new gradient stop
* list that maps to the original cairo stop list.
*/
if ((extend == CAIRO_EXTEND_REFLECT
|| extend == CAIRO_EXTEND_REPEAT)
&& r0 > 0.0) {
double r_org = r1;
if (extend == CAIRO_EXTEND_REFLECT) {
r1 = 2 * r1 - r0;
emulate_reflect = TRUE;
}
offset = fmod (r1, r1 - r0) / (r1 - r0) - 1.0;
r = r1 - r0;
/* New position of outer circle. */
x = r * (x1 - fx) / r_org + fx;
y = r * (y1 - fy) / r_org + fy;
x1 = x;
y1 = y;
r1 = r;
r0 = 0.0;
} else {
offset = r0 / r1;
}
_cairo_output_stream_printf (document->xml_node_defs,
"<radialGradient id=\"radial%d\" "
"gradientUnits=\"userSpaceOnUse\" "
"cx=\"%f\" cy=\"%f\" "
"fx=\"%f\" fy=\"%f\" r=\"%f\" ",
document->radial_pattern_id,
x1, y1,
fx, fy, r1);
if (emulate_reflect)
_cairo_output_stream_printf (document->xml_node_defs, "spreadMethod=\"repeat\" ");
else
_cairo_svg_surface_emit_pattern_extend (document->xml_node_defs, &pattern->base.base);
_cairo_svg_surface_emit_transform (document->xml_node_defs, "gradientTransform", &p2u, parent_matrix);
_cairo_output_stream_printf (document->xml_node_defs, ">\n");
/* To support cairo's EXTEND_NONE, (for which SVG has no similar
* notion), we add transparent color stops on either end of the
* user-provided stops. */
if (extend == CAIRO_EXTEND_NONE) {
_cairo_output_stream_printf (document->xml_node_defs,
"<stop offset=\"0\" style=\""
"stop-color:rgb(0%%,0%%,0%%);"
"stop-opacity:0;\"/>\n");
if (r0 != 0.0)
_cairo_output_stream_printf (document->xml_node_defs,
"<stop offset=\"%f\" style=\""
"stop-color:rgb(0%%,0%%,0%%);"
"stop-opacity:0;\"/>\n",
r0 / r1);
}
status = _cairo_svg_surface_emit_pattern_stops (document->xml_node_defs,
&pattern->base, offset,
reverse_stops,
emulate_reflect);
if (unlikely (status))
return status;
if (pattern->base.base.extend == CAIRO_EXTEND_NONE)
_cairo_output_stream_printf (document->xml_node_defs,
"<stop offset=\"1.0\" style=\""
"stop-color:rgb(0%%,0%%,0%%);"
"stop-opacity:0;\"/>\n");
}
_cairo_output_stream_printf (document->xml_node_defs,
"</radialGradient>\n");
_cairo_output_stream_printf (style,
"%s:url(#radial%d);",
is_stroke ? "stroke" : "fill",
document->radial_pattern_id);
document->radial_pattern_id++;
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cairo_svg_surface_emit_pattern (cairo_svg_surface_t *surface,
const cairo_pattern_t *pattern,
cairo_output_stream_t *output,
cairo_bool_t is_stroke,
const cairo_matrix_t *parent_matrix)
{
switch (pattern->type) {
case CAIRO_PATTERN_TYPE_SOLID:
return _cairo_svg_surface_emit_solid_pattern (surface, (cairo_solid_pattern_t *) pattern,
output, is_stroke);
case CAIRO_PATTERN_TYPE_SURFACE:
return _cairo_svg_surface_emit_surface_pattern (surface, (cairo_surface_pattern_t *) pattern,
output, is_stroke, parent_matrix);
case CAIRO_PATTERN_TYPE_LINEAR:
return _cairo_svg_surface_emit_linear_pattern (surface, (cairo_linear_pattern_t *) pattern,
output, is_stroke, parent_matrix);
case CAIRO_PATTERN_TYPE_RADIAL:
return _cairo_svg_surface_emit_radial_pattern (surface, (cairo_radial_pattern_t *) pattern,
output, is_stroke, parent_matrix);
case CAIRO_PATTERN_TYPE_MESH:
case CAIRO_PATTERN_TYPE_RASTER_SOURCE:
ASSERT_NOT_REACHED;
}
return _cairo_error (CAIRO_STATUS_PATTERN_TYPE_MISMATCH);
}
static cairo_status_t
_cairo_svg_surface_emit_fill_style (cairo_output_stream_t *output,
cairo_svg_surface_t *surface,
cairo_operator_t op,
const cairo_pattern_t *source,
cairo_fill_rule_t fill_rule,
const cairo_matrix_t *parent_matrix)
{
_cairo_output_stream_printf (output,
"fill-rule:%s;",
fill_rule == CAIRO_FILL_RULE_EVEN_ODD ?
"evenodd" : "nonzero");
_cairo_svg_surface_emit_operator_for_style (output, surface, op);
return _cairo_svg_surface_emit_pattern (surface, source, output, FALSE, parent_matrix);
}
static cairo_status_t
_cairo_svg_surface_emit_stroke_style (cairo_output_stream_t *output,
cairo_svg_surface_t *surface,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_stroke_style_t *stroke_style,
const cairo_matrix_t *parent_matrix)
{
cairo_status_t status;
const char *line_cap, *line_join;
unsigned int i;
switch (stroke_style->line_cap) {
case CAIRO_LINE_CAP_BUTT:
line_cap = "butt";
break;
case CAIRO_LINE_CAP_ROUND:
line_cap = "round";
break;
case CAIRO_LINE_CAP_SQUARE:
line_cap = "square";
break;
default:
ASSERT_NOT_REACHED;
}
switch (stroke_style->line_join) {
case CAIRO_LINE_JOIN_MITER:
line_join = "miter";
break;
case CAIRO_LINE_JOIN_ROUND:
line_join = "round";
break;
case CAIRO_LINE_JOIN_BEVEL:
line_join = "bevel";
break;
default:
ASSERT_NOT_REACHED;
}
_cairo_output_stream_printf (output,
"stroke-width:%f;"
"stroke-linecap:%s;"
"stroke-linejoin:%s;",
stroke_style->line_width,
line_cap,
line_join);
status = _cairo_svg_surface_emit_pattern (surface, source, output, TRUE, parent_matrix);
if (unlikely (status))
return status;
_cairo_svg_surface_emit_operator_for_style (output, surface, op);
if (stroke_style->num_dashes > 0) {
_cairo_output_stream_printf (output, "stroke-dasharray:");
for (i = 0; i < stroke_style->num_dashes; i++) {
_cairo_output_stream_printf (output, "%f",
stroke_style->dash[i]);
if (i + 1 < stroke_style->num_dashes)
_cairo_output_stream_printf (output, ",");
else
_cairo_output_stream_printf (output, ";");
}
if (stroke_style->dash_offset != 0.0) {
_cairo_output_stream_printf (output,
"stroke-dashoffset:%f;",
stroke_style->dash_offset);
}
}
_cairo_output_stream_printf (output,
"stroke-miterlimit:%f;",
stroke_style->miter_limit);
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
_cairo_svg_surface_fill_stroke (void *abstract_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,
const 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_svg_surface_t *surface = abstract_surface;
cairo_status_t status;
status = _cairo_surface_clipper_set_clip (&surface->clipper, clip);
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->xml_node, "<path style=\"");
status = _cairo_svg_surface_emit_fill_style (surface->xml_node, surface, fill_op,
fill_source, fill_rule, stroke_ctm_inverse);
if (unlikely (status))
return status;
status = _cairo_svg_surface_emit_stroke_style (surface->xml_node, surface, stroke_op,
stroke_source, stroke_style, stroke_ctm_inverse);
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->xml_node, "\" ");
_cairo_svg_surface_emit_path (surface->xml_node, path, stroke_ctm_inverse);
_cairo_svg_surface_emit_transform (surface->xml_node, " transform", stroke_ctm, NULL);
_cairo_output_stream_printf (surface->xml_node, "/>\n");
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
_cairo_svg_surface_fill (void *abstract_surface,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_path_fixed_t*path,
cairo_fill_rule_t fill_rule,
double tolerance,
cairo_antialias_t antialias,
const cairo_clip_t *clip)
{
cairo_svg_surface_t *surface = abstract_surface;
cairo_status_t status;
if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE)
return _cairo_svg_surface_analyze_operation (surface, op, source);
assert (_cairo_svg_surface_operation_supported (surface, op, source));
status = _cairo_surface_clipper_set_clip (&surface->clipper, clip);
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->xml_node, "<path style=\" stroke:none;");
status = _cairo_svg_surface_emit_fill_style (surface->xml_node, surface, op, source, fill_rule, NULL);
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->xml_node, "\" ");
_cairo_svg_surface_emit_path (surface->xml_node, path, NULL);
_cairo_output_stream_printf (surface->xml_node, "/>\n");
return CAIRO_STATUS_SUCCESS;
}
static cairo_bool_t
_cairo_svg_surface_get_extents (void *abstract_surface,
cairo_rectangle_int_t *rectangle)
{
cairo_svg_surface_t *surface = abstract_surface;
rectangle->x = 0;
rectangle->y = 0;
/* XXX: The conversion to integers here is pretty bogus, (not to
* mention the arbitrary limitation of width to a short(!). We
* may need to come up with a better interface for get_size.
*/
rectangle->width = ceil (surface->width);
rectangle->height = ceil (surface->height);
return surface->surface_bounded;
}
static cairo_status_t
_cairo_svg_surface_emit_paint (cairo_output_stream_t *output,
cairo_svg_surface_t *surface,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_pattern_t *mask_source,
const char *extra_attributes)
{
cairo_status_t status;
if (source->type == CAIRO_PATTERN_TYPE_SURFACE &&
source->extend == CAIRO_EXTEND_NONE)
return _cairo_svg_surface_emit_composite_pattern (output,
surface,
op,
(cairo_surface_pattern_t *) source,
invalid_pattern_id,
mask_source ? &mask_source->matrix :NULL,
extra_attributes);
_cairo_output_stream_printf (output,
"<rect x=\"0\" y=\"0\" "
"width=\"%f\" height=\"%f\" "
"style=\"",
surface->width, surface->height);
_cairo_svg_surface_emit_operator_for_style (output, surface, op);
status = _cairo_svg_surface_emit_pattern (surface, source, output, FALSE, NULL);
if (unlikely (status))
return status;
_cairo_output_stream_printf (output, "stroke:none;\"");
if (extra_attributes)
_cairo_output_stream_printf (output, " %s", extra_attributes);
_cairo_output_stream_printf (output, "/>\n");
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
_cairo_svg_surface_paint (void *abstract_surface,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_clip_t *clip)
{
cairo_status_t status;
cairo_svg_surface_t *surface = abstract_surface;
/* Emulation of clear and source operators, when no clipping region
* is defined. We just delete existing content of surface root node,
* and exit early if operator is clear.
*/
if ((op == CAIRO_OPERATOR_CLEAR || op == CAIRO_OPERATOR_SOURCE) &&
clip == NULL)
{
switch (surface->paginated_mode) {
case CAIRO_PAGINATED_MODE_FALLBACK:
ASSERT_NOT_REACHED;
case CAIRO_PAGINATED_MODE_ANALYZE:
return CAIRO_STATUS_SUCCESS;
case CAIRO_PAGINATED_MODE_RENDER:
status = _cairo_output_stream_destroy (surface->xml_node);
if (unlikely (status)) {
surface->xml_node = NULL;
return status;
}
surface->xml_node = _cairo_memory_stream_create ();
if (_cairo_output_stream_get_status (surface->xml_node)) {
status = _cairo_output_stream_destroy (surface->xml_node);
surface->xml_node = NULL;
return status;
}
if (op == CAIRO_OPERATOR_CLEAR) {
if (surface->content == CAIRO_CONTENT_COLOR) {
_cairo_output_stream_printf (surface->xml_node,
"<rect "
"width=\"%f\" height=\"%f\" "
"style=\"opacity:1;"
"stroke:none;"
"fill:rgb(0,0,0);\"/>\n",
surface->width, surface->height);
}
return CAIRO_STATUS_SUCCESS;
}
break;
}
} else {
if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE)
return _cairo_svg_surface_analyze_operation (surface, op, source);
assert (_cairo_svg_surface_operation_supported (surface, op, source));
}
status = _cairo_surface_clipper_set_clip (&surface->clipper, clip);
if (unlikely (status))
return status;
return _cairo_svg_surface_emit_paint (surface->xml_node,
surface, op, source, 0, NULL);
}
static cairo_int_status_t
_cairo_svg_surface_mask (void *abstract_surface,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_pattern_t *mask,
const cairo_clip_t *clip)
{
cairo_status_t status;
cairo_svg_surface_t *surface = abstract_surface;
cairo_svg_document_t *document = surface->document;
cairo_output_stream_t *mask_stream;
char buffer[64];
cairo_bool_t discard_filter = FALSE;
unsigned int mask_id;
if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE) {
cairo_status_t source_status, mask_status;
source_status = _cairo_svg_surface_analyze_operation (surface, op, source);
if (_cairo_status_is_error (source_status))
return source_status;
if (mask->has_component_alpha) {
mask_status = CAIRO_INT_STATUS_UNSUPPORTED;
} else {
mask_status = _cairo_svg_surface_analyze_operation (surface, op, mask);
if (_cairo_status_is_error (mask_status))
return mask_status;
}
return _cairo_analysis_surface_merge_status (source_status,
mask_status);
}
assert (_cairo_svg_surface_operation_supported (surface, op, source));
assert (_cairo_svg_surface_operation_supported (surface, CAIRO_OPERATOR_OVER, mask));
status = _cairo_surface_clipper_set_clip (&surface->clipper, clip);
if (unlikely (status))
return status;
if (mask->type == CAIRO_PATTERN_TYPE_SURFACE) {
const cairo_surface_pattern_t *surface_pattern = (const cairo_surface_pattern_t*) mask;
cairo_content_t content = surface_pattern->surface->content;
if (content == CAIRO_CONTENT_ALPHA)
discard_filter = TRUE;
}
if (!discard_filter)
_cairo_svg_surface_emit_alpha_filter (document);
/* _cairo_svg_surface_emit_paint() will output a pattern definition to
* document->xml_node_defs so we need to write the mask element to
* a temporary stream and then copy that to xml_node_defs. */
mask_stream = _cairo_memory_stream_create ();
if (_cairo_output_stream_get_status (mask_stream))
return _cairo_output_stream_destroy (mask_stream);
mask_id = _cairo_svg_document_allocate_mask_id (document);
_cairo_output_stream_printf (mask_stream,
"<mask id=\"mask%d\">\n"
"%s",
mask_id,
discard_filter ? "" : " <g filter=\"url(#alpha)\">\n");
status = _cairo_svg_surface_emit_paint (mask_stream, surface, CAIRO_OPERATOR_OVER, mask, source, NULL);
if (unlikely (status)) {
cairo_status_t ignore = _cairo_output_stream_destroy (mask_stream);
return status;
(void) ignore;
}
_cairo_output_stream_printf (mask_stream,
"%s"
"</mask>\n",
discard_filter ? "" : " </g>\n");
_cairo_memory_stream_copy (mask_stream, document->xml_node_defs);
status = _cairo_output_stream_destroy (mask_stream);
if (unlikely (status))
return status;
snprintf (buffer, sizeof buffer, "mask=\"url(#mask%d)\"",
mask_id);
status = _cairo_svg_surface_emit_paint (surface->xml_node, surface, op, source, 0, buffer);
if (unlikely (status))
return status;
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
_cairo_svg_surface_stroke (void *abstract_dst,
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_svg_surface_t *surface = abstract_dst;
cairo_status_t status;
if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE)
return _cairo_svg_surface_analyze_operation (surface, op, source);
assert (_cairo_svg_surface_operation_supported (surface, op, source));
status = _cairo_surface_clipper_set_clip (&surface->clipper, clip);
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->xml_node, "<path style=\"fill:none;");
status = _cairo_svg_surface_emit_stroke_style (surface->xml_node, surface, op,
source, stroke_style, ctm_inverse);
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->xml_node, "\" ");
_cairo_svg_surface_emit_path (surface->xml_node, path, ctm_inverse);
_cairo_svg_surface_emit_transform (surface->xml_node, " transform", ctm, NULL);
_cairo_output_stream_printf (surface->xml_node, "/>\n");
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
_cairo_svg_surface_show_glyphs (void *abstract_surface,
cairo_operator_t op,
const cairo_pattern_t *pattern,
cairo_glyph_t *glyphs,
int num_glyphs,
cairo_scaled_font_t *scaled_font,
const cairo_clip_t *clip)
{
cairo_svg_surface_t *surface = abstract_surface;
cairo_svg_document_t *document = surface->document;
cairo_path_fixed_t path;
cairo_int_status_t status;
cairo_scaled_font_subsets_glyph_t subset_glyph;
int i;
if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE)
return _cairo_svg_surface_analyze_operation (surface, op, pattern);
assert (_cairo_svg_surface_operation_supported (surface, op, pattern));
if (num_glyphs <= 0)
return CAIRO_STATUS_SUCCESS;
status = _cairo_surface_clipper_set_clip (&surface->clipper, clip);
if (unlikely (status))
return status;
/* FIXME it's probably possible to apply a pattern of a gradient to
* a group of symbols, but I don't know how yet. Gradients or patterns
* are translated by x and y properties of use element. */
if (pattern->type != CAIRO_PATTERN_TYPE_SOLID)
goto FALLBACK;
_cairo_output_stream_printf (surface->xml_node, "<g style=\"");
status = _cairo_svg_surface_emit_pattern (surface, pattern,
surface->xml_node, FALSE, NULL);
if (unlikely (status))
return status;
_cairo_svg_surface_emit_operator_for_style (surface->xml_node, surface, op);
_cairo_output_stream_printf (surface->xml_node, "\">\n");
for (i = 0; i < num_glyphs; i++) {
status = _cairo_scaled_font_subsets_map_glyph (document->font_subsets,
scaled_font, glyphs[i].index,
NULL, 0,
&subset_glyph);
if (status == CAIRO_INT_STATUS_UNSUPPORTED) {
_cairo_output_stream_printf (surface->xml_node, "</g>\n");
glyphs += i;
num_glyphs -= i;
goto FALLBACK;
}
if (unlikely (status))
return status;
_cairo_output_stream_printf (surface->xml_node,
" <use xlink:href=\"#glyph%d-%d\" "
"x=\"%f\" y=\"%f\"/>\n",
subset_glyph.font_id,
subset_glyph.subset_glyph_index,
glyphs[i].x, glyphs[i].y);
}
_cairo_output_stream_printf (surface->xml_node, "</g>\n");
return CAIRO_STATUS_SUCCESS;
FALLBACK:
_cairo_path_fixed_init (&path);
status = _cairo_scaled_font_glyph_path (scaled_font,
(cairo_glyph_t *) glyphs,
num_glyphs, &path);
if (unlikely (status)) {
_cairo_path_fixed_fini (&path);
return status;
}
status = _cairo_svg_surface_fill (abstract_surface, op, pattern,
&path, CAIRO_FILL_RULE_WINDING,
0.0, CAIRO_ANTIALIAS_SUBPIXEL,
clip);
_cairo_path_fixed_fini (&path);
return status;
}
static void
_cairo_svg_surface_get_font_options (void *abstract_surface,
cairo_font_options_t *options)
{
_cairo_font_options_init_default (options);
cairo_font_options_set_hint_style (options, CAIRO_HINT_STYLE_NONE);
cairo_font_options_set_hint_metrics (options, CAIRO_HINT_METRICS_OFF);
cairo_font_options_set_antialias (options, CAIRO_ANTIALIAS_GRAY);
_cairo_font_options_set_round_glyph_positions (options, CAIRO_ROUND_GLYPH_POS_OFF);
}
static const char **
_cairo_svg_surface_get_supported_mime_types (void *abstract_surface)
{
return _cairo_svg_supported_mime_types;
}
static const cairo_surface_backend_t cairo_svg_surface_backend = {
CAIRO_SURFACE_TYPE_SVG,
_cairo_svg_surface_finish,
_cairo_default_context_create,
NULL, /* create_similar: handled by wrapper */
NULL, /* create_similar_image */
NULL, /* map to image */
NULL, /* unmap image */
_cairo_surface_default_source,
NULL, /* acquire_source_image */
NULL, /* release_source_image */
NULL, /* snapshot */
_cairo_svg_surface_copy_page,
_cairo_svg_surface_show_page,
_cairo_svg_surface_get_extents,
_cairo_svg_surface_get_font_options,
NULL, /* flush */
NULL, /* mark dirty rectangle */
_cairo_svg_surface_paint,
_cairo_svg_surface_mask,
_cairo_svg_surface_stroke,
_cairo_svg_surface_fill,
_cairo_svg_surface_fill_stroke,
_cairo_svg_surface_show_glyphs,
NULL, /* has_show_text_glyphs */
NULL, /* show_text_glyphs */
_cairo_svg_surface_get_supported_mime_types,
};
static cairo_status_t
_cairo_svg_document_create (cairo_output_stream_t *output_stream,
double width,
double height,
cairo_svg_version_t version,
cairo_svg_document_t **document_out)
{
cairo_svg_document_t *document;
cairo_status_t status, status_ignored;
if (output_stream->status)
return output_stream->status;
document = _cairo_malloc (sizeof (cairo_svg_document_t));
if (unlikely (document == NULL))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
/* The use of defs for font glyphs imposes no per-subset limit. */
document->font_subsets = _cairo_scaled_font_subsets_create_scaled ();
if (unlikely (document->font_subsets == NULL)) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto CLEANUP_DOCUMENT;
}
document->output_stream = output_stream;
document->refcount = 1;
document->owner = NULL;
document->finished = FALSE;
document->width = width;
document->height = height;
document->unit = CAIRO_SVG_UNIT_PT;
document->linear_pattern_id = 0;
document->radial_pattern_id = 0;
document->pattern_id = 0;
document->filter_id = 0;
document->clip_id = 0;
document->mask_id = 0;
document->xml_node_defs = _cairo_memory_stream_create ();
status = _cairo_output_stream_get_status (document->xml_node_defs);
if (unlikely (status))
goto CLEANUP_NODE_DEFS;
document->xml_node_glyphs = _cairo_memory_stream_create ();
status = _cairo_output_stream_get_status (document->xml_node_glyphs);
if (unlikely (status))
goto CLEANUP_NODE_GLYPHS;
document->alpha_filter = FALSE;
document->svg_version = version;
*document_out = document;
return CAIRO_STATUS_SUCCESS;
CLEANUP_NODE_GLYPHS:
status_ignored = _cairo_output_stream_destroy (document->xml_node_glyphs);
CLEANUP_NODE_DEFS:
status_ignored = _cairo_output_stream_destroy (document->xml_node_defs);
_cairo_scaled_font_subsets_destroy (document->font_subsets);
CLEANUP_DOCUMENT:
free (document);
return status;
}
static cairo_svg_document_t *
_cairo_svg_document_reference (cairo_svg_document_t *document)
{
document->refcount++;
return document;
}
static unsigned int
_cairo_svg_document_allocate_mask_id (cairo_svg_document_t *document)
{
return document->mask_id++;
}
static cairo_status_t
_cairo_svg_document_destroy (cairo_svg_document_t *document)
{
cairo_status_t status;
document->refcount--;
if (document->refcount > 0)
return CAIRO_STATUS_SUCCESS;
status = _cairo_svg_document_finish (document);
free (document);
return status;
}
static cairo_status_t
_cairo_svg_document_finish (cairo_svg_document_t *document)
{
cairo_status_t status, status2;
cairo_output_stream_t *output = document->output_stream;
cairo_svg_page_t *page;
unsigned int i;
if (document->finished)
return CAIRO_STATUS_SUCCESS;
/*
* Should we add DOCTYPE?
*
* Google says no.
*
* There's a bunch of issues, but just to pick a few:
* - they'll give false positives.
* - they'll give false negatives.
* - they're namespace-unaware.
* - they don't wildcard.
* So when they say OK they really haven't checked anything, when
* they say NOT OK they might be on crack, and like all
* namespace-unaware things they're a dead branch of the XML tree.
*
* Unfortunately the SVG DTDs are a source of so many issues that the
* SVG WG has decided not to write one for the upcoming SVG 1.2
* standard. In fact SVG WG members are even telling people not to use
* a DOCTYPE declaration in SVG 1.0 and 1.1 documents.
*/
_cairo_output_stream_printf (output,
"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
"width=\"%f%s\" height=\"%f%s\" "
"viewBox=\"0 0 %f %f\" version=\"%s\">\n",
document->width, _cairo_svg_unit_strings [document->unit],
document->height, _cairo_svg_unit_strings [document->unit],
document->width, document->height,
_cairo_svg_internal_version_strings [document->svg_version]);
status = _cairo_svg_document_emit_font_subsets (document);
if (_cairo_memory_stream_length (document->xml_node_glyphs) > 0 ||
_cairo_memory_stream_length (document->xml_node_defs) > 0) {
_cairo_output_stream_printf (output, "<defs>\n");
if (_cairo_memory_stream_length (document->xml_node_glyphs) > 0) {
_cairo_output_stream_printf (output, "<g>\n");
_cairo_memory_stream_copy (document->xml_node_glyphs, output);
_cairo_output_stream_printf (output, "</g>\n");
}
_cairo_memory_stream_copy (document->xml_node_defs, output);
_cairo_output_stream_printf (output, "</defs>\n");
}
if (document->owner != NULL) {
cairo_svg_surface_t *surface;
surface = (cairo_svg_surface_t *) _cairo_paginated_surface_get_target (document->owner);
if (surface->xml_node != NULL &&
_cairo_memory_stream_length (surface->xml_node) > 0) {
if (unlikely (_cairo_svg_surface_store_page (surface) == NULL)) {
if (status == CAIRO_STATUS_SUCCESS)
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
}
if (surface->page_set.num_elements > 1 &&
_cairo_svg_version_has_page_set_support (document->svg_version)) {
_cairo_output_stream_printf (output, "<pageSet>\n");
for (i = 0; i < surface->page_set.num_elements; i++) {
page = _cairo_array_index (&surface->page_set, i);
_cairo_output_stream_printf (output, "<page>\n");
_cairo_output_stream_printf (output,
"<g id=\"surface%d\">\n",
page->surface_id);
_cairo_memory_stream_copy (page->xml_node, output);
_cairo_output_stream_printf (output, "</g>\n</page>\n");
}
_cairo_output_stream_printf (output, "</pageSet>\n");
} else if (surface->page_set.num_elements > 0) {
page = _cairo_array_index (&surface->page_set, surface->page_set.num_elements - 1);
_cairo_output_stream_printf (output,
"<g id=\"surface%d\">\n",
page->surface_id);
_cairo_memory_stream_copy (page->xml_node, output);
_cairo_output_stream_printf (output, "</g>\n");
}
}
_cairo_output_stream_printf (output, "</svg>\n");
status2 = _cairo_output_stream_destroy (document->xml_node_glyphs);
if (status == CAIRO_STATUS_SUCCESS)
status = status2;
status2 = _cairo_output_stream_destroy (document->xml_node_defs);
if (status == CAIRO_STATUS_SUCCESS)
status = status2;
status2 = _cairo_output_stream_destroy (output);
if (status == CAIRO_STATUS_SUCCESS)
status = status2;
document->finished = TRUE;
return status;
}
static cairo_int_status_t
_cairo_svg_surface_set_paginated_mode (void *abstract_surface,
cairo_paginated_mode_t paginated_mode)
{
cairo_svg_surface_t *surface = abstract_surface;
surface->paginated_mode = paginated_mode;
return CAIRO_STATUS_SUCCESS;
}
static cairo_bool_t
_cairo_svg_surface_supports_fine_grained_fallbacks (void *abstract_surface)
{
cairo_svg_surface_t *surface = abstract_surface;
cairo_int_status_t status = CAIRO_INT_STATUS_UNSUPPORTED;
if (surface->document->svg_version >= CAIRO_SVG_VERSION_1_2) {
status = _cairo_svg_surface_analyze_operator (surface,
CAIRO_OPERATOR_SOURCE);
}
return status == CAIRO_INT_STATUS_SUCCESS;
}
static const cairo_paginated_surface_backend_t cairo_svg_surface_paginated_backend = {
NULL /*_cairo_svg_surface_start_page*/,
_cairo_svg_surface_set_paginated_mode,
NULL, /* _cairo_svg_surface_set_bounding_box */
NULL, /* _cairo_svg_surface_set_fallback_images_required */
_cairo_svg_surface_supports_fine_grained_fallbacks,
};