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cairo/src/cairo-svg-surface.c
Adrian Johnson 0cae2a4a74 Use _cairo_calloc() to allocate structs 
To avoid any possibility of uninitialized memory.

The exceptions are:
 - where the allocation is immediately overwritten by a memcpy or struct copy.
 - arrays of structs to avoid any performance impact (except when the
   array is returned by the public API).
2024-06-21 10:32:23 +09:30

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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
* Copyright © 2020-2021 Anton Danilkin <afdw@yandex.ru>
*
* 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):
* Kristian Høgsberg <krh@redhat.com>
* Emmanuel Pacaud <emmanuel.pacaud@free.fr>
* Carl Worth <cworth@cworth.org>
* Anton Danilkin <afdw@yandex.ru>
*/
#include "cairoint.h"
#include "cairo-svg.h"
#include "cairo-array-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-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.
**/
typedef struct _cairo_svg_source_surface {
cairo_hash_entry_t base;
unsigned int id;
unsigned char *unique_id;
unsigned long unique_id_length;
cairo_bool_t transitive_paint_used;
} cairo_svg_source_surface_t;
/*
* _cairo_svg_paint_element and _cairo_svg_paint are used to implement paints in transformed recording patterns.
*/
typedef struct _cairo_svg_paint_element {
unsigned int source_id;
cairo_matrix_t matrix;
} cairo_svg_paint_element_t;
typedef struct _cairo_svg_paint {
cairo_hash_entry_t base;
unsigned int source_id;
cairo_array_t paint_elements;
cairo_box_double_t box;
} cairo_svg_paint_t;
static void
_cairo_svg_source_surface_init_key (cairo_svg_source_surface_t *source_surface)
{
if (source_surface->unique_id && source_surface->unique_id_length > 0) {
source_surface->base.hash = _cairo_hash_bytes (_CAIRO_HASH_INIT_VALUE,
source_surface->unique_id,
source_surface->unique_id_length);
} else {
source_surface->base.hash = source_surface->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 *source_surface = entry;
cairo_hash_table_t *patterns = closure;
_cairo_hash_table_remove (patterns, &source_surface->base);
free (source_surface->unique_id);
free (source_surface);
}
static void
_cairo_svg_paint_init_key (cairo_svg_paint_t *paint)
{
paint->base.hash = paint->source_id;
}
static cairo_bool_t
_cairo_svg_paint_equal (const void *key_a, const void *key_b)
{
const cairo_svg_paint_t *a = key_a;
const cairo_svg_paint_t *b = key_b;
return a->source_id == b->source_id;
}
static void
_cairo_svg_paint_pluck (void *entry, void *closure)
{
cairo_svg_paint_t *paint = entry;
cairo_hash_table_t *patterns = closure;
_cairo_hash_table_remove (patterns, &paint->base);
_cairo_array_fini (&paint->paint_elements);
free (paint);
}
static void
_cairo_svg_paint_box_add_padding (cairo_box_double_t *box)
{
double width = box->p2.x - box->p1.x;
double height = box->p2.y - box->p1.y;
box->p1.x -= width / 10.0;
box->p1.y -= height / 10.0;
box->p2.x += width / 10.0;
box->p2.y += height / 10.0;
}
enum cairo_svg_stream_element_type {
CAIRO_SVG_STREAM_ELEMENT_TYPE_TEXT,
CAIRO_SVG_STREAM_ELEMENT_TYPE_PAINT_DEPENDENT,
};
enum cairo_svg_stream_paint_dependent_element_type {
CAIRO_SVG_STREAM_PAINT_DEPENDENT_ELEMENT_TYPE_RECTANGLE,
CAIRO_SVG_STREAM_PAINT_DEPENDENT_ELEMENT_TYPE_RECTANGLE_AT_ORIGIN,
CAIRO_SVG_STREAM_PAINT_DEPENDENT_ELEMENT_TYPE_TRANSLATION,
CAIRO_SVG_STREAM_PAINT_DEPENDENT_ELEMENT_TYPE_INVERSE_TRANSLATION,
};
typedef struct _cairo_svg_stream_element {
enum cairo_svg_stream_element_type type;
union {
struct {
cairo_output_stream_t *output_stream;
} text;
struct {
unsigned int source_id;
enum cairo_svg_stream_paint_dependent_element_type type;
} paint_dependent;
};
} cairo_svg_stream_element_t;
typedef struct _cairo_svg_stream {
cairo_status_t status;
cairo_array_t elements;
} cairo_svg_stream_t;
static cairo_svg_stream_t
_cairo_svg_stream_create ()
{
cairo_svg_stream_t svg_stream;
svg_stream.status = CAIRO_STATUS_SUCCESS;
_cairo_array_init (&svg_stream.elements, sizeof (cairo_svg_stream_element_t));
return svg_stream;
}
static void
_cairo_svg_stream_write (cairo_svg_stream_t *svg_stream,
const void *data,
size_t length)
{
cairo_status_t status;
cairo_svg_stream_element_t *last_element = NULL;
if (svg_stream->elements.num_elements > 0) {
last_element = _cairo_array_index (&svg_stream->elements,
svg_stream->elements.num_elements - 1);
}
if (last_element == NULL || last_element->type != CAIRO_SVG_STREAM_ELEMENT_TYPE_TEXT) {
cairo_svg_stream_element_t element;
element.type = CAIRO_SVG_STREAM_ELEMENT_TYPE_TEXT;
element.text.output_stream = _cairo_memory_stream_create();
status = _cairo_array_append (&svg_stream->elements, &element);
if (unlikely (status)) {
if (svg_stream->status == CAIRO_STATUS_SUCCESS) {
svg_stream->status = status;
}
return;
}
last_element = _cairo_array_index (&svg_stream->elements,
svg_stream->elements.num_elements - 1);
}
_cairo_output_stream_write (last_element->text.output_stream, data, length);
}
static void CAIRO_PRINTF_FORMAT (2, 0)
_cairo_svg_stream_printf (cairo_svg_stream_t *svg_stream,
const char *fmt,
...)
{
cairo_status_t status;
cairo_svg_stream_element_t *last_element = NULL;
if (svg_stream->elements.num_elements > 0) {
last_element = _cairo_array_index (&svg_stream->elements,
svg_stream->elements.num_elements - 1);
}
if (last_element == NULL || last_element->type != CAIRO_SVG_STREAM_ELEMENT_TYPE_TEXT) {
cairo_svg_stream_element_t element;
element.type = CAIRO_SVG_STREAM_ELEMENT_TYPE_TEXT;
element.text.output_stream = _cairo_memory_stream_create();
status = _cairo_array_append (&svg_stream->elements, &element);
if (unlikely (status)) {
if (svg_stream->status == CAIRO_STATUS_SUCCESS) {
svg_stream->status = status;
}
return;
}
last_element = _cairo_array_index (&svg_stream->elements,
svg_stream->elements.num_elements - 1);
}
va_list ap;
va_start (ap, fmt);
_cairo_output_stream_vprintf (last_element->text.output_stream, fmt, ap);
va_end (ap);
}
static void
_cairo_svg_stream_append_paint_dependent (cairo_svg_stream_t *svg_stream,
unsigned int source_id,
enum cairo_svg_stream_paint_dependent_element_type type)
{
cairo_status_t status;
cairo_svg_stream_element_t element;
element.type = CAIRO_SVG_STREAM_ELEMENT_TYPE_PAINT_DEPENDENT;
element.paint_dependent.source_id = source_id;
element.paint_dependent.type = type;
status = _cairo_array_append (&svg_stream->elements, &element);
if (svg_stream->status == CAIRO_STATUS_SUCCESS) {
svg_stream->status = status;
}
}
static void
_cairo_svg_stream_copy (cairo_svg_stream_t *from,
cairo_svg_stream_t *to)
{
cairo_status_t status;
if (unlikely (from->status)) {
if (to->status == CAIRO_STATUS_SUCCESS) {
to->status = from->status;
}
return;
}
for (unsigned int i = 0; i < from->elements.num_elements; i++) {
cairo_svg_stream_element_t *element = _cairo_array_index (&from->elements, i);
cairo_svg_stream_element_t element_copy = *element;
if (element->type == CAIRO_SVG_STREAM_ELEMENT_TYPE_TEXT) {
element_copy.text.output_stream = _cairo_memory_stream_create ();
_cairo_memory_stream_copy (element->text.output_stream, element_copy.text.output_stream);
if (to->status == CAIRO_STATUS_SUCCESS) {
to->status = element->text.output_stream->status;
}
}
status = _cairo_array_append (&to->elements, &element_copy);
if (unlikely (status)) {
if (to->status == CAIRO_STATUS_SUCCESS) {
to->status = status;
}
return;
}
}
}
static void
_cairo_svg_stream_copy_to_output_stream (cairo_svg_stream_t *from,
cairo_output_stream_t *to,
cairo_hash_table_t *paints)
{
if (unlikely (from->status)) {
if (to->status == CAIRO_STATUS_SUCCESS) {
to->status = from->status;
}
return;
}
for (unsigned int i = 0; i < from->elements.num_elements; i++) {
cairo_svg_stream_element_t *element = _cairo_array_index (&from->elements, i);
if (element->type == CAIRO_SVG_STREAM_ELEMENT_TYPE_TEXT) {
_cairo_memory_stream_copy (element->text.output_stream, to);
}
if (element->type == CAIRO_SVG_STREAM_ELEMENT_TYPE_PAINT_DEPENDENT) {
cairo_svg_paint_t paint_key;
paint_key.source_id = element->paint_dependent.source_id;
_cairo_svg_paint_init_key (&paint_key);
cairo_svg_paint_t *found_paint_entry = _cairo_hash_table_lookup (paints,
&paint_key.base);
assert (found_paint_entry);
switch (element->paint_dependent.type) {
case CAIRO_SVG_STREAM_PAINT_DEPENDENT_ELEMENT_TYPE_RECTANGLE:
_cairo_output_stream_printf (to,
" x=\"%f\" y=\"%f\" width=\"%f\" height=\"%f\"",
found_paint_entry->box.p1.x,
found_paint_entry->box.p1.y,
found_paint_entry->box.p2.x - found_paint_entry->box.p1.x,
found_paint_entry->box.p2.y - found_paint_entry->box.p1.y);
break;
case CAIRO_SVG_STREAM_PAINT_DEPENDENT_ELEMENT_TYPE_RECTANGLE_AT_ORIGIN:
_cairo_output_stream_printf (to,
" x=\"0\" y=\"0\" width=\"%f\" height=\"%f\"",
found_paint_entry->box.p2.x - found_paint_entry->box.p1.x,
found_paint_entry->box.p2.y - found_paint_entry->box.p1.y);
break;
case CAIRO_SVG_STREAM_PAINT_DEPENDENT_ELEMENT_TYPE_TRANSLATION:
_cairo_output_stream_printf (to,
" transform=\"translate(%f, %f)\"",
found_paint_entry->box.p1.x,
found_paint_entry->box.p1.y);
break;
case CAIRO_SVG_STREAM_PAINT_DEPENDENT_ELEMENT_TYPE_INVERSE_TRANSLATION:
_cairo_output_stream_printf (to,
" transform=\"translate(%f, %f)\"",
-found_paint_entry->box.p1.x,
-found_paint_entry->box.p1.y);
break;
}
}
}
}
static cairo_status_t
_cairo_svg_stream_destroy (cairo_svg_stream_t *svg_stream)
{
cairo_status_t status = svg_stream->status;
for (unsigned int i = 0; i < svg_stream->elements.num_elements; i++) {
cairo_svg_stream_element_t *element = _cairo_array_index (&svg_stream->elements, i);
if (element->type == CAIRO_SVG_STREAM_ELEMENT_TYPE_TEXT) {
cairo_status_t element_status = _cairo_output_stream_destroy (element->text.output_stream);
if (status == CAIRO_STATUS_SUCCESS) {
status = element_status;
}
}
}
_cairo_array_fini (&svg_stream->elements);
return status;
}
/**
* 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
**/
static const unsigned 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_svg_stream_t *output,
const cairo_path_fixed_t *path,
const cairo_matrix_t *ctm_inverse);
static const char * _cairo_svg_version_strings[CAIRO_SVG_VERSION_LAST] =
{
"SVG 1.1",
"SVG 1.2"
};
static const char * _cairo_svg_unit_strings[] =
{
"",
"em",
"ex",
"px",
"in",
"cm",
"mm",
"pt",
"pc",
"%"
};
enum cairo_svg_filter {
CAIRO_SVG_FILTER_REMOVE_COLOR,
CAIRO_SVG_FILTER_REMOVE_COLOR_AND_INVERT_ALPHA,
CAIRO_SVG_FILTER_COLOR_TO_ALPHA,
CAIRO_SVG_FILTER_LAST_STATIC_FILTER,
CAIRO_SVG_FILTER_OVER,
CAIRO_SVG_FILTER_IN,
CAIRO_SVG_FILTER_OUT,
CAIRO_SVG_FILTER_ATOP,
CAIRO_SVG_FILTER_XOR,
CAIRO_SVG_FILTER_ADD,
CAIRO_SVG_FILTER_MULTIPLY,
CAIRO_SVG_FILTER_SCREEN,
CAIRO_SVG_FILTER_OVERLAY,
CAIRO_SVG_FILTER_DARKEN,
CAIRO_SVG_FILTER_LIGHTEN,
CAIRO_SVG_FILTER_COLOR_DODGE,
CAIRO_SVG_FILTER_COLOR_BURN,
CAIRO_SVG_FILTER_HARD_LIGHT,
CAIRO_SVG_FILTER_SOFT_LIGHT,
CAIRO_SVG_FILTER_DIFFERENCE,
CAIRO_SVG_FILTER_EXCLUSION,
CAIRO_SVG_FILTER_HUE,
CAIRO_SVG_FILTER_SATURATION,
CAIRO_SVG_FILTER_COLOR,
CAIRO_SVG_FILTER_LUMINOSITY,
};
typedef struct _cairo_svg_page {
cairo_svg_stream_t xml_node;
} cairo_svg_page_t;
typedef 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_svg_stream_t xml_node_defs;
cairo_svg_stream_t xml_node_glyphs;
cairo_svg_stream_t xml_node_filters;
unsigned int linear_pattern_id;
unsigned int radial_pattern_id;
unsigned int pattern_id;
unsigned int clip_id;
unsigned int mask_id;
unsigned int compositing_group_id;
unsigned int filter_id;
cairo_bool_t filters_emitted[CAIRO_SVG_FILTER_LAST_STATIC_FILTER];
cairo_svg_version_t svg_version;
cairo_scaled_font_subsets_t *font_subsets;
cairo_hash_table_t *paints;
} cairo_svg_document_t;
// Must be compatible with the struct _cairo_svg_surface_start.
typedef struct _cairo_svg_surface {
cairo_surface_t base;
cairo_bool_t force_fallbacks;
unsigned int source_id;
unsigned int depth;
double width;
double height;
cairo_bool_t surface_bounded;
cairo_svg_document_t *document;
cairo_svg_stream_t xml_node;
cairo_array_t page_set;
cairo_hash_table_t *source_surfaces;
cairo_surface_clipper_t clipper;
cairo_svg_stream_t *current_clipper_stream;
unsigned int clip_level;
cairo_bool_t transitive_paint_used;
cairo_paginated_mode_t paginated_mode;
} cairo_svg_surface_t;
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 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 cairo_status_t
_cairo_svg_surface_emit_composite_pattern (cairo_svg_stream_t *output,
cairo_svg_surface_t *surface,
cairo_surface_pattern_t *pattern,
unsigned int pattern_id,
const cairo_matrix_t *parent_matrix);
static cairo_status_t
_cairo_svg_surface_emit_paint (cairo_svg_stream_t *output,
cairo_svg_surface_t *surface,
const cairo_pattern_t *source,
cairo_bool_t at_origin);
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;
if (surface->status)
return FALSE;
if (surface->finished) {
(void) _cairo_surface_set_error (surface, _cairo_error (CAIRO_STATUS_SURFACE_FINISHED));
return FALSE;
}
if (!_cairo_surface_is_paginated (surface)) {
(void) _cairo_surface_set_error (surface, _cairo_error (CAIRO_STATUS_SURFACE_TYPE_MISMATCH));
return FALSE;
}
target = _cairo_paginated_surface_get_target (surface);
if (target->status) {
(void) _cairo_surface_set_error (surface, target->status);
return FALSE;
}
if (target->finished) {
(void) _cairo_surface_set_error (surface, _cairo_error (CAIRO_STATUS_SURFACE_FINISHED));
return FALSE;
}
if (!_cairo_surface_is_svg (target)) {
(void) _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;
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 user unit.
*
* 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;
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;
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_paint_compute (cairo_svg_document_t *document, cairo_svg_paint_t *paint) {
for (unsigned int i = 0; i < paint->paint_elements.num_elements; i++) {
cairo_svg_paint_element_t *paint_element = _cairo_array_index (&paint->paint_elements, i);
cairo_svg_paint_t paint_key;
paint_key.source_id = paint_element->source_id;
_cairo_svg_paint_init_key (&paint_key);
cairo_svg_paint_t *found_paint_entry = _cairo_hash_table_lookup (document->paints,
&paint_key.base);
assert (found_paint_entry);
_cairo_svg_paint_compute (document, found_paint_entry);
cairo_box_double_t box = found_paint_entry->box;
_cairo_matrix_transform_bounding_box (&paint_element->matrix,
&box.p1.x, &box.p1.y,
&box.p2.x, &box.p2.y,
NULL);
_cairo_svg_paint_box_add_padding (&box);
if (i == 0) {
paint->box = box;
} else {
paint->box.p1.x = MIN (paint->box.p1.x, box.p1.x);
paint->box.p1.y = MIN (paint->box.p1.y, box.p1.y);
paint->box.p2.x = MAX (paint->box.p2.x, box.p2.x);
paint->box.p2.y = MAX (paint->box.p2.y, box.p2.y);
}
}
_cairo_array_truncate (&paint->paint_elements, 0);
}
static void
_cairo_svg_paint_compute_func (void *entry, void *closure)
{
cairo_svg_paint_t *paint = entry;
cairo_svg_document_t *document = closure;
_cairo_svg_paint_compute (document, paint);
}
static cairo_status_t
_cairo_svg_surface_add_source_surface (cairo_svg_surface_t *surface,
cairo_surface_t *source_surface,
cairo_bool_t *is_new,
cairo_svg_source_surface_t **result_source_surface)
{
cairo_status_t status;
cairo_svg_source_surface_t source_surface_key;
source_surface_key.id = source_surface->unique_id;
cairo_surface_get_mime_data (source_surface,
CAIRO_MIME_TYPE_UNIQUE_ID,
(const unsigned char **) &source_surface_key.unique_id,
&source_surface_key.unique_id_length);
_cairo_svg_source_surface_init_key (&source_surface_key);
cairo_svg_source_surface_t *found_source_surface_entry = _cairo_hash_table_lookup (surface->source_surfaces,
&source_surface_key.base);
if (found_source_surface_entry) {
*is_new = FALSE;
*result_source_surface = found_source_surface_entry;
return CAIRO_STATUS_SUCCESS;
}
unsigned char *unique_id = NULL;
unsigned long unique_id_length = 0;
if (source_surface_key.unique_id && source_surface_key.unique_id_length > 0) {
unique_id = _cairo_malloc (source_surface_key.unique_id_length);
if (unique_id == NULL) {
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
unique_id_length = source_surface_key.unique_id_length;
memcpy (unique_id, source_surface_key.unique_id, unique_id_length);
} else {
unique_id = NULL;
unique_id_length = 0;
}
cairo_svg_source_surface_t *source_surface_entry = _cairo_calloc (sizeof (cairo_svg_source_surface_t));
if (source_surface_entry == NULL) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto fail;
}
source_surface_entry->id = source_surface_key.id;
source_surface_entry->unique_id_length = unique_id_length;
source_surface_entry->unique_id = unique_id;
_cairo_svg_source_surface_init_key (source_surface_entry);
status = _cairo_hash_table_insert (surface->source_surfaces, &source_surface_entry->base);
if (unlikely (status)) {
goto fail;
}
*is_new = TRUE;
*result_source_surface = source_surface_entry;
return CAIRO_STATUS_SUCCESS;
fail:
free (unique_id);
free (source_surface_entry);
return status;
}
static cairo_bool_t
_cairo_svg_surface_cliprect_covers_surface (cairo_svg_surface_t *surface,
cairo_path_fixed_t *path)
{
cairo_box_t box;
return surface->surface_bounded &&
_cairo_path_fixed_is_box (path, &box) &&
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;
}
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;
if (path == NULL) {
for (unsigned int i = 0; i < surface->clip_level; i++) {
_cairo_svg_stream_printf (surface->current_clipper_stream, "</g>\n");
}
surface->clip_level = 0;
return CAIRO_STATUS_SUCCESS;
}
/* skip trivial whole-page clips */
if (_cairo_svg_surface_cliprect_covers_surface (surface, path)) {
return CAIRO_STATUS_SUCCESS;
}
_cairo_svg_stream_printf (&document->xml_node_defs,
"<clipPath id=\"clip-%d\">\n",
document->clip_id);
_cairo_svg_stream_printf (&document->xml_node_defs,
"<path clip-rule=\"%s\"",
fill_rule == CAIRO_FILL_RULE_EVEN_ODD ? "evenodd" : "nonzero");
_cairo_svg_surface_emit_path (&document->xml_node_defs, path, NULL);
_cairo_svg_stream_printf (&document->xml_node_defs, "/>\n");
_cairo_svg_stream_printf (&document->xml_node_defs, "</clipPath>\n");
_cairo_svg_stream_printf (surface->current_clipper_stream,
"<g clip-path=\"url(#clip-%d)\">\n",
document->clip_id);
document->clip_id++;
surface->clip_level++;
return CAIRO_STATUS_SUCCESS;
}
static void
_cairo_svg_surface_reset_clip (cairo_svg_surface_t *surface)
{
_cairo_surface_clipper_reset (&surface->clipper);
if (surface->current_clipper_stream != NULL) {
for (unsigned int i = 0; i < surface->clip_level; i++) {
_cairo_svg_stream_printf (surface->current_clipper_stream, "</g>\n");
}
}
surface->clip_level = 0;
}
static cairo_status_t
_cairo_svg_surface_set_clip (cairo_svg_surface_t *surface,
cairo_svg_stream_t *clipper_stream,
const cairo_clip_t *clip)
{
if (surface->current_clipper_stream != clipper_stream) {
_cairo_svg_surface_reset_clip (surface);
surface->current_clipper_stream = clipper_stream;
}
return _cairo_surface_clipper_set_clip (&surface->clipper, clip);
}
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;
surface = _cairo_calloc (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->source_id = surface->base.unique_id;
surface->depth = 0;
surface->width = width;
surface->height = height;
surface->surface_bounded = bounded;
surface->document = _cairo_svg_document_reference (document);
surface->xml_node = _cairo_svg_stream_create ();
_cairo_array_init (&surface->page_set, sizeof (cairo_svg_page_t));
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;
}
_cairo_surface_clipper_init (&surface->clipper, _cairo_svg_surface_clipper_intersect_clip_path);
surface->current_clipper_stream = NULL;
surface->clip_level = 0;
surface->transitive_paint_used = FALSE;
surface->paginated_mode = CAIRO_PAGINATED_MODE_ANALYZE;
surface->force_fallbacks = FALSE;
paginated = _cairo_paginated_surface_create (&surface->base,
surface->base.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:
(void) _cairo_svg_stream_destroy (&surface->xml_node);
(void) _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;
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) {
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_surface_reset_clip (surface);
cairo_svg_page_t page;
page.xml_node = surface->xml_node;
if (_cairo_array_append (&surface->page_set, &page)) {
return NULL;
}
surface->xml_node = _cairo_svg_stream_create ();
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 = _cairo_svg_surface_store_page (surface);
if (unlikely (page == NULL)) {
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
_cairo_svg_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;
cairo_svg_page_t *page = _cairo_svg_surface_store_page (surface);
if (unlikely (page == NULL)) {
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
return CAIRO_STATUS_SUCCESS;
}
static void
_cairo_svg_surface_emit_transform (cairo_svg_stream_t *output,
char const *attribute_name,
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_svg_stream_printf (output,
" %s=\"matrix(%f, %f, %f, %f, %f, %f)\"",
attribute_name,
matrix.xx, matrix.yx,
matrix.xy, matrix.yy,
matrix.x0, matrix.y0);
}
}
typedef struct {
cairo_svg_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_svg_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_svg_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_svg_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_svg_stream_printf (info->output, "Z ");
return CAIRO_STATUS_SUCCESS;
}
static void
_cairo_svg_surface_emit_path (cairo_svg_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_svg_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_svg_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,
NULL, /* foreground color */
&scaled_glyph);
if (unlikely (status)) {
return status;
}
if (_cairo_path_fixed_size (scaled_glyph->path) != 0) {
_cairo_svg_stream_printf (&document->xml_node_glyphs,
"<path");
_cairo_svg_surface_emit_path (&document->xml_node_glyphs,
scaled_glyph->path,
NULL);
_cairo_svg_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_status_t status;
cairo_scaled_glyph_t *scaled_glyph;
status = _cairo_scaled_glyph_lookup (scaled_font,
glyph_index,
CAIRO_SCALED_GLYPH_INFO_METRICS | CAIRO_SCALED_GLYPH_INFO_SURFACE,
NULL, /* foreground color */
&scaled_glyph);
if (unlikely (status)) {
return status;
}
cairo_bool_t use_recording_surface = (scaled_glyph->has_info & CAIRO_SCALED_GLYPH_INFO_RECORDING_SURFACE) != 0;
cairo_matrix_t glyph_matrix = scaled_glyph->surface->base.device_transform_inverse;
cairo_image_surface_t *glyph_image_surface = scaled_glyph->surface;
// Attempt to recognize a common pattern for a bitmap font and extract the original glyph image from it
cairo_surface_t *extracted_surface;
cairo_image_surface_t *extracted_image = NULL;
void *extracted_image_extra;
if (use_recording_surface) {
cairo_recording_surface_t *recording_surface = (cairo_recording_surface_t *) scaled_glyph->recording_surface;
if (recording_surface->commands.num_elements == 1) {
cairo_command_t *command = *((cairo_command_t **) _cairo_array_index (&recording_surface->commands, 0));
if (command->header.type == CAIRO_COMMAND_MASK &&
command->header.op == CAIRO_OPERATOR_OVER &&
command->header.clip == NULL &&
command->mask.source.base.type == CAIRO_PATTERN_TYPE_SOLID &&
_cairo_color_equal (&command->mask.source.solid.color, _cairo_stock_color (CAIRO_STOCK_BLACK)) &&
command->mask.mask.base.extend == CAIRO_EXTEND_NONE &&
command->mask.mask.base.type == CAIRO_PATTERN_TYPE_SURFACE &&
command->mask.mask.surface.surface->type == CAIRO_SURFACE_TYPE_IMAGE) {
extracted_surface = command->mask.mask.surface.surface;
if (_cairo_surface_acquire_source_image (extracted_surface,
&extracted_image,
&extracted_image_extra) == CAIRO_STATUS_SUCCESS) {
if (extracted_image->format == CAIRO_FORMAT_A1 || extracted_image->format == CAIRO_FORMAT_A8) {
use_recording_surface = FALSE;
glyph_image_surface = extracted_image;
glyph_matrix = command->mask.mask.base.matrix;
status = cairo_matrix_invert (&glyph_matrix);
assert (status == CAIRO_STATUS_SUCCESS);
}
}
}
}
}
cairo_surface_t *paginated_surface = _cairo_svg_surface_create_for_document (document,
CAIRO_CONTENT_COLOR_ALPHA,
0,
0,
FALSE);
cairo_svg_surface_t *svg_surface = (cairo_svg_surface_t *) _cairo_paginated_surface_get_target (paginated_surface);
status = paginated_surface->status;
if (unlikely (status)) {
goto cleanup;
}
unsigned int source_id = svg_surface->base.unique_id;
cairo_surface_set_fallback_resolution (paginated_surface,
document->owner->x_fallback_resolution,
document->owner->y_fallback_resolution);
cairo_svg_stream_t temporary_stream = _cairo_svg_stream_create ();
unsigned int mask_id = document->mask_id++;
_cairo_svg_stream_printf (&temporary_stream,
"<mask id=\"mask-%d\">\n",
mask_id);
cairo_pattern_t *pattern = cairo_pattern_create_for_surface (use_recording_surface ? scaled_glyph->recording_surface
: &glyph_image_surface->base);
_cairo_svg_surface_emit_composite_pattern (&temporary_stream,
svg_surface,
(cairo_surface_pattern_t *) pattern,
invalid_pattern_id,
NULL);
cairo_pattern_destroy (pattern);
_cairo_svg_stream_printf (&temporary_stream, "</mask>\n");
_cairo_svg_stream_copy (&temporary_stream, &document->xml_node_defs);
status = _cairo_svg_stream_destroy (&temporary_stream);
if (unlikely (status)) {
goto cleanup;
}
svg_surface->transitive_paint_used = TRUE;
_cairo_svg_stream_printf (&document->xml_node_glyphs, "<rect");
_cairo_svg_stream_append_paint_dependent (&document->xml_node_glyphs,
source_id,
CAIRO_SVG_STREAM_PAINT_DEPENDENT_ELEMENT_TYPE_RECTANGLE);
_cairo_svg_stream_printf (&document->xml_node_glyphs,
" mask=\"url(#mask-%d)\"",
mask_id);
if (!use_recording_surface) {
_cairo_svg_surface_emit_transform (&document->xml_node_glyphs,
"transform",
&glyph_matrix,
NULL);
}
_cairo_svg_stream_printf (&document->xml_node_glyphs, "/>\n");
cairo_svg_paint_t *paint_entry = _cairo_calloc (sizeof (cairo_svg_paint_t));
if (paint_entry == NULL) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto cleanup;
}
paint_entry->source_id = source_id;
paint_entry->box.p1.x = 0;
paint_entry->box.p1.y = 0;
paint_entry->box.p2.x = glyph_image_surface->width;
paint_entry->box.p2.y = glyph_image_surface->height;
if (use_recording_surface) {
_cairo_matrix_transform_bounding_box (&glyph_matrix,
&paint_entry->box.p1.x, &paint_entry->box.p1.y,
&paint_entry->box.p2.x, &paint_entry->box.p2.y,
NULL);
}
_cairo_svg_paint_box_add_padding (&paint_entry->box);
_cairo_array_init (&paint_entry->paint_elements, sizeof (cairo_svg_paint_element_t));
_cairo_svg_paint_init_key (paint_entry);
status = _cairo_hash_table_insert (document->paints, &paint_entry->base);
if (unlikely (status)) {
goto cleanup;
}
cleanup:
if (status == CAIRO_STATUS_SUCCESS) {
status = cairo_surface_status (paginated_surface);
}
cairo_surface_destroy (paginated_surface);
if (extracted_image != NULL) {
_cairo_surface_release_source_image (extracted_surface, extracted_image, extracted_image_extra);
}
return status;
}
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_svg_stream_printf (&document->xml_node_glyphs,
"<g 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_svg_stream_printf (&document->xml_node_glyphs, "</g>\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);
_cairo_scaled_font_subsets_destroy (document->font_subsets);
document->font_subsets = NULL;
return status;
}
static cairo_bool_t
_cairo_svg_surface_are_operation_and_pattern_supported (cairo_svg_surface_t *surface,
cairo_operator_t op,
const cairo_pattern_t *pattern)
{
if (surface->force_fallbacks) {
return FALSE;
}
if (op == CAIRO_OPERATOR_SATURATE) {
return FALSE;
}
/* SVG 1.1 does not support these operators. We already have code for them for SVG 2
* that can be enabled when SVG 2 becomes widespread. */
if (op == CAIRO_OPERATOR_OVERLAY ||
op == CAIRO_OPERATOR_COLOR_DODGE ||
op == CAIRO_OPERATOR_COLOR_BURN ||
op == CAIRO_OPERATOR_HARD_LIGHT ||
op == CAIRO_OPERATOR_SOFT_LIGHT ||
op == CAIRO_OPERATOR_DIFFERENCE ||
op == CAIRO_OPERATOR_EXCLUSION ||
op == CAIRO_OPERATOR_HSL_HUE ||
op == CAIRO_OPERATOR_HSL_SATURATION ||
op == CAIRO_OPERATOR_HSL_COLOR ||
op == CAIRO_OPERATOR_HSL_LUMINOSITY) {
return FALSE;
}
if (pattern->type == CAIRO_PATTERN_TYPE_SURFACE) {
/* Do not cause stack overflow because of too deep or infinite recording surfaces. */
if (((cairo_surface_pattern_t *) pattern)->surface->type == CAIRO_SURFACE_TYPE_RECORDING &&
surface->depth > 1000) {
return FALSE;
}
/* SVG doesn't support extends reflect and pad for surface pattern. */
if (pattern->extend != CAIRO_EXTEND_NONE && pattern->extend != CAIRO_EXTEND_REPEAT) {
return FALSE;
}
}
/* SVG 1.1 does not support the focal point (fx, fy) that is outside of the circle defined by (cx, cy) and r. */
if (pattern->type == CAIRO_PATTERN_TYPE_RADIAL) {
cairo_radial_pattern_t *radial_pattern = (cairo_radial_pattern_t *) pattern;
double max_radius;
if (radial_pattern->cd1.radius > radial_pattern->cd2.radius) {
max_radius = radial_pattern->cd1.radius;
} else {
max_radius = radial_pattern->cd2.radius;
}
cairo_point_double_t c1 = radial_pattern->cd1.center;
cairo_point_double_t c2 = radial_pattern->cd2.center;
if ((c1.x - c2.x) * (c1.x - c2.x) + (c1.y - c2.y) * (c1.y - c2.y) >= max_radius * max_radius) {
return FALSE;
}
}
if (pattern->type == CAIRO_PATTERN_TYPE_MESH) {
return FALSE;
}
if (pattern->type == CAIRO_PATTERN_TYPE_RASTER_SOURCE) {
return FALSE;
}
return TRUE;
}
static cairo_status_t
_cairo_svg_surface_finish (void *abstract_surface)
{
cairo_status_t status, final_status;
cairo_svg_surface_t *surface = abstract_surface;
if (_cairo_paginated_surface_get_target (surface->document->owner) == &surface->base) {
final_status = _cairo_svg_document_finish (surface->document);
} else {
final_status = CAIRO_STATUS_SUCCESS;
}
status = _cairo_svg_stream_destroy (&surface->xml_node);
if (final_status == CAIRO_STATUS_SUCCESS) {
final_status = status;
}
for (unsigned int i = 0; i < surface->page_set.num_elements; i++) {
cairo_svg_page_t *page = _cairo_array_index (&surface->page_set, i);
status = _cairo_svg_stream_destroy (&page->xml_node);
if (final_status == CAIRO_STATUS_SUCCESS) {
final_status = status;
}
}
_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);
status = _cairo_svg_document_destroy (surface->document);
if (final_status == CAIRO_STATUS_SUCCESS) {
final_status = status;
}
return final_status;
}
static const char *
_cairo_svg_surface_emit_static_filter (cairo_svg_document_t *document, enum cairo_svg_filter filter)
{
if (!document->filters_emitted[filter]) {
document->filters_emitted[filter] = TRUE;
if (filter == CAIRO_SVG_FILTER_REMOVE_COLOR) {
// (r, g, b, a) -> (1, 1, 1, a)
_cairo_svg_stream_printf (&document->xml_node_filters,
"<filter id=\"filter-remove-color\" "
"x=\"0%%\" y=\"0%%\" width=\"100%%\" height=\"100%%\">\n"
"<feColorMatrix color-interpolation-filters=\"sRGB\" "
"values=\"0 0 0 0 1 "
/* */ "0 0 0 0 1 "
/* */ "0 0 0 0 1 "
/* */ "0 0 0 1 0\" />\n"
"</filter>\n");
} else if (filter == CAIRO_SVG_FILTER_REMOVE_COLOR_AND_INVERT_ALPHA) {
// (r, g, b, a) -> (1, 1, 1, 1 - a)
_cairo_svg_stream_printf (&document->xml_node_filters,
"<filter id=\"filter-remove-color-and-invert-alpha\" "
"x=\"0%%\" y=\"0%%\" width=\"100%%\" height=\"100%%\">\n"
"<feColorMatrix color-interpolation-filters=\"sRGB\" "
"values=\"0 0 0 0 1 "
/* */ "0 0 0 0 1 "
/* */ "0 0 0 0 1 "
/* */ "0 0 0 -1 1\"/>\n"
"</filter>\n");
} else if (filter == CAIRO_SVG_FILTER_COLOR_TO_ALPHA) {
// (r, g, b, a) -> (1, 1, 1, 0.2126 * r + 0.7152 * g + 0.0722 * b)
_cairo_svg_stream_printf (&document->xml_node_filters,
"<filter id=\"filter-color-to-alpha\" "
"x=\"0%%\" y=\"0%%\" width=\"100%%\" height=\"100%%\">\n"
"<feColorMatrix color-interpolation-filters=\"sRGB\" "
"values=\"0 0 0 0 1 "
/* */ "0 0 0 0 1 "
/* */ "0 0 0 0 1 "
/* */ "0.2126 0.7152 0.0722 0 0\"/>\n"
"</filter>\n");
}
}
if (filter == CAIRO_SVG_FILTER_REMOVE_COLOR) {
return "remove-color";
} else if (filter == CAIRO_SVG_FILTER_REMOVE_COLOR_AND_INVERT_ALPHA) {
return "remove-color-and-invert-alpha";
} else if (filter == CAIRO_SVG_FILTER_COLOR_TO_ALPHA) {
return "color-to-alpha";
} else {
ASSERT_NOT_REACHED;
}
return FALSE; /* squelch warning */
}
#define _CAIRO_SVG_SURFACE_OUTPUT_FE_COMPOSITE_FILTER(operation) \
_cairo_svg_stream_printf (&surface->document->xml_node_filters, \
"<filter id=\"filter-%d\" " \
"x=\"0%%\" y=\"0%%\" width=\"100%%\" height=\"100%%\">\n" \
"<feImage xlink:href=\"#compositing-group-%d\" result=\"source\"", \
filter_id, \
source_compositing_group_id); \
_cairo_svg_stream_append_paint_dependent (&surface->document->xml_node_filters, \
surface->source_id, \
CAIRO_SVG_STREAM_PAINT_DEPENDENT_ELEMENT_TYPE_RECTANGLE_AT_ORIGIN); \
_cairo_svg_stream_printf (&surface->document->xml_node_filters, \
"/>\n" \
"<feImage xlink:href=\"#compositing-group-%d\" result=\"destination\"", \
destination_compositing_group_id); \
_cairo_svg_stream_append_paint_dependent (&surface->document->xml_node_filters, \
surface->source_id, \
CAIRO_SVG_STREAM_PAINT_DEPENDENT_ELEMENT_TYPE_RECTANGLE_AT_ORIGIN); \
_cairo_svg_stream_printf (&surface->document->xml_node_filters, \
"/>\n" \
"<feComposite in=\"source\" in2=\"destination\" " \
"operator=\"" operation "\" " \
"color-interpolation-filters=\"sRGB\"/>\n" \
"</filter>\n", \
filter_id, \
source_compositing_group_id, \
destination_compositing_group_id);
#define _CAIRO_SVG_SURFACE_OUTPUT_FE_BLEND_FILTER(mode) \
_cairo_svg_stream_printf (&surface->document->xml_node_filters, \
"<filter id=\"filter-%d\" " \
"x=\"0%%\" y=\"0%%\" width=\"100%%\" height=\"100%%\">\n" \
"<feImage xlink:href=\"#compositing-group-%d\" result=\"source\"", \
filter_id, \
source_compositing_group_id); \
_cairo_svg_stream_append_paint_dependent (&surface->document->xml_node_filters, \
surface->source_id, \
CAIRO_SVG_STREAM_PAINT_DEPENDENT_ELEMENT_TYPE_RECTANGLE_AT_ORIGIN); \
_cairo_svg_stream_printf (&surface->document->xml_node_filters, \
"/>\n" \
"<feImage xlink:href=\"#compositing-group-%d\" result=\"destination\"", \
destination_compositing_group_id); \
_cairo_svg_stream_append_paint_dependent (&surface->document->xml_node_filters, \
surface->source_id, \
CAIRO_SVG_STREAM_PAINT_DEPENDENT_ELEMENT_TYPE_RECTANGLE_AT_ORIGIN); \
_cairo_svg_stream_printf (&surface->document->xml_node_filters, \
"/>\n" \
"<feBlend in=\"source\" in2=\"destination\" " \
"mode=\"" mode "\" " \
"color-interpolation-filters=\"sRGB\"/>\n" \
"</filter>\n", \
filter_id, \
source_compositing_group_id, \
destination_compositing_group_id);
static unsigned int
_cairo_svg_surface_emit_parametric_filter (cairo_svg_surface_t *surface,
enum cairo_svg_filter filter,
unsigned int source_compositing_group_id,
unsigned int destination_compositing_group_id)
{
unsigned int filter_id = surface->document->filter_id++;
switch (filter) {
case CAIRO_SVG_FILTER_OVER:
_CAIRO_SVG_SURFACE_OUTPUT_FE_COMPOSITE_FILTER ("over")
break;
case CAIRO_SVG_FILTER_IN:
_CAIRO_SVG_SURFACE_OUTPUT_FE_COMPOSITE_FILTER ("in")
break;
case CAIRO_SVG_FILTER_OUT:
_CAIRO_SVG_SURFACE_OUTPUT_FE_COMPOSITE_FILTER ("out")
break;
case CAIRO_SVG_FILTER_ATOP:
_CAIRO_SVG_SURFACE_OUTPUT_FE_COMPOSITE_FILTER ("atop")
break;
case CAIRO_SVG_FILTER_XOR:
_CAIRO_SVG_SURFACE_OUTPUT_FE_COMPOSITE_FILTER ("xor")
break;
case CAIRO_SVG_FILTER_ADD:
// This can also be done with <feComposite operator="lighter"/>, but it is not in SVG 1.1
_cairo_svg_stream_printf (&surface->document->xml_node_filters,
"<filter id=\"filter-%d\" "
"x=\"0%%\" y=\"0%%\" width=\"100%%\" height=\"100%%\">\n"
"<feImage xlink:href=\"#compositing-group-%d\" result=\"source\"",
filter_id,
source_compositing_group_id);
_cairo_svg_stream_append_paint_dependent (&surface->document->xml_node_filters,
surface->source_id,
CAIRO_SVG_STREAM_PAINT_DEPENDENT_ELEMENT_TYPE_RECTANGLE_AT_ORIGIN);
_cairo_svg_stream_printf (&surface->document->xml_node_filters,
"/>\n"
"<feImage xlink:href=\"#compositing-group-%d\" result=\"destination\"",
destination_compositing_group_id);
_cairo_svg_stream_append_paint_dependent (&surface->document->xml_node_filters,
surface->source_id,
CAIRO_SVG_STREAM_PAINT_DEPENDENT_ELEMENT_TYPE_RECTANGLE_AT_ORIGIN);
_cairo_svg_stream_printf (&surface->document->xml_node_filters,
"/>\n"
"<feComposite in=\"source\" in2=\"destination\" "
"operator=\"arithmetic\" k1=\"0\" k2=\"1\" k3=\"1\" k4=\"0\" "
"color-interpolation-filters=\"sRGB\"/>\n"
"</filter>\n");
break;
case CAIRO_SVG_FILTER_MULTIPLY:
_CAIRO_SVG_SURFACE_OUTPUT_FE_BLEND_FILTER ("multiply")
break;
case CAIRO_SVG_FILTER_SCREEN:
_CAIRO_SVG_SURFACE_OUTPUT_FE_BLEND_FILTER ("screen")
break;
case CAIRO_SVG_FILTER_OVERLAY:
_CAIRO_SVG_SURFACE_OUTPUT_FE_BLEND_FILTER ("overlay")
break;
case CAIRO_SVG_FILTER_DARKEN:
_CAIRO_SVG_SURFACE_OUTPUT_FE_BLEND_FILTER ("darken")
break;
case CAIRO_SVG_FILTER_LIGHTEN:
_CAIRO_SVG_SURFACE_OUTPUT_FE_BLEND_FILTER ("lighten")
break;
case CAIRO_SVG_FILTER_COLOR_DODGE:
_CAIRO_SVG_SURFACE_OUTPUT_FE_BLEND_FILTER ("color-dodge")
break;
case CAIRO_SVG_FILTER_COLOR_BURN:
_CAIRO_SVG_SURFACE_OUTPUT_FE_BLEND_FILTER ("color-burn")
break;
case CAIRO_SVG_FILTER_HARD_LIGHT:
_CAIRO_SVG_SURFACE_OUTPUT_FE_BLEND_FILTER ("hard-light")
break;
case CAIRO_SVG_FILTER_SOFT_LIGHT:
_CAIRO_SVG_SURFACE_OUTPUT_FE_BLEND_FILTER ("soft-light")
break;
case CAIRO_SVG_FILTER_DIFFERENCE:
_CAIRO_SVG_SURFACE_OUTPUT_FE_BLEND_FILTER ("difference")
break;
case CAIRO_SVG_FILTER_EXCLUSION:
_CAIRO_SVG_SURFACE_OUTPUT_FE_BLEND_FILTER ("exclusion")
break;
case CAIRO_SVG_FILTER_HUE:
_CAIRO_SVG_SURFACE_OUTPUT_FE_BLEND_FILTER ("hue")
break;
case CAIRO_SVG_FILTER_SATURATION:
_CAIRO_SVG_SURFACE_OUTPUT_FE_BLEND_FILTER ("saturation")
break;
case CAIRO_SVG_FILTER_COLOR:
_CAIRO_SVG_SURFACE_OUTPUT_FE_BLEND_FILTER ("color")
break;
case CAIRO_SVG_FILTER_LUMINOSITY:
_CAIRO_SVG_SURFACE_OUTPUT_FE_BLEND_FILTER ("luminosity")
break;
case CAIRO_SVG_FILTER_REMOVE_COLOR:
case CAIRO_SVG_FILTER_REMOVE_COLOR_AND_INVERT_ALPHA:
case CAIRO_SVG_FILTER_COLOR_TO_ALPHA:
case CAIRO_SVG_FILTER_LAST_STATIC_FILTER:
default:
ASSERT_NOT_REACHED;
}
return filter_id;
}
typedef struct {
cairo_svg_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_svg_stream_write (info->output, dst, 4);
} while (length >= 3);
for (i = 0; i < length; i++) {
src[i] = *data++;
}
info->in_mem = length;
return info->output->status;
}
static cairo_int_status_t
_cairo_surface_base64_encode_jpeg (cairo_surface_t *surface,
cairo_svg_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_svg_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_svg_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_svg_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_svg_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_svg_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;
}
/**
* _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: &amp; and &quot;.
**/
static void
_cairo_svg_surface_emit_attr_value (cairo_svg_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_svg_stream_write (stream, q, p - q);
q = p + 1;
}
if (*p == '&')
_cairo_svg_stream_printf (stream, "&amp;");
else // p == '"'
_cairo_svg_stream_printf (stream, "&quot;");
}
}
/* flush the trailing chars if any */
if (p != q)
_cairo_svg_stream_write (stream, q, p - q);
}
static cairo_status_t
_cairo_svg_surface_emit_surface (cairo_svg_document_t *document,
cairo_surface_t *surface,
unsigned 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_svg_stream_printf (&document->xml_node_defs,
"<image id=\"source-%d\" x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\"",
source_id,
extents.x, extents.y,
extents.width, extents.height);
if (extents.width != 0 && extents.height != 0) {
_cairo_svg_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_svg_stream_printf (&document->xml_node_defs, "\"");
}
_cairo_svg_stream_printf (&document->xml_node_defs, "/>\n");
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cairo_svg_surface_emit_composite_surface_pattern (cairo_svg_stream_t *output,
cairo_svg_surface_t *surface,
cairo_surface_pattern_t *pattern,
unsigned int pattern_id,
const cairo_matrix_t *parent_matrix)
{
cairo_status_t status;
cairo_matrix_t p2u = pattern->base.matrix;
status = cairo_matrix_invert (&p2u);
/* cairo_pattern_set_matrix ensures the matrix is invertible */
assert (status == CAIRO_STATUS_SUCCESS);
cairo_bool_t is_new;
cairo_svg_source_surface_t *source_surface;
status = _cairo_svg_surface_add_source_surface (surface,
pattern->surface,
&is_new,
&source_surface);
if (unlikely (status)) {
return status;
}
unsigned int source_id = source_surface->id;
if (is_new) {
status = _cairo_svg_surface_emit_surface (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_svg_stream_printf (output,
"<pattern id=\"pattern-%d\" "
"patternUnits=\"userSpaceOnUse\" "
"x=\"%d\" y=\"%d\" "
"width=\"%d\" height=\"%d\" "
"viewBox=\"%d %d %d %d\"",
pattern_id,
extents.x, extents.y,
extents.width, extents.height,
extents.x, extents.y,
extents.width, extents.height);
_cairo_svg_surface_emit_transform (output,
"patternTransform",
&p2u,
parent_matrix);
_cairo_svg_stream_printf (output, ">\n");
}
_cairo_svg_stream_printf (output,
"<use xlink:href=\"#source-%d\"",
source_id);
if (pattern->surface->content == CAIRO_CONTENT_ALPHA) {
cairo_bool_t can_skip_filter = FALSE;
if (pattern->surface->backend &&
pattern->surface->backend->type == CAIRO_SURFACE_TYPE_IMAGE &&
(((cairo_image_surface_t *) pattern->surface)->format == CAIRO_FORMAT_A1 ||
((cairo_image_surface_t *) pattern->surface)->format == CAIRO_FORMAT_A8)) {
can_skip_filter = TRUE;
}
if (!can_skip_filter) {
_cairo_svg_stream_printf (output,
" filter=\"url(#filter-%s)\"",
_cairo_svg_surface_emit_static_filter (surface->document,
CAIRO_SVG_FILTER_COLOR_TO_ALPHA));
}
}
if (pattern_id == invalid_pattern_id) {
_cairo_svg_surface_emit_transform (output,
"transform",
&p2u,
parent_matrix);
}
_cairo_svg_stream_printf (output, "/>\n");
if (pattern_id != invalid_pattern_id) {
_cairo_svg_stream_printf (output, "</pattern>\n");
}
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cairo_svg_surface_emit_recording_surface (cairo_svg_surface_t *surface,
cairo_recording_surface_t *source,
unsigned int source_id,
cairo_bool_t *transitive_paint_used)
{
cairo_status_t status;
cairo_svg_document_t *document = surface->document;
cairo_surface_t *paginated_surface = _cairo_svg_surface_create_for_document (document,
source->base.content,
0,
0,
FALSE);
cairo_svg_surface_t *svg_surface = (cairo_svg_surface_t *) _cairo_paginated_surface_get_target (paginated_surface);
if (unlikely (paginated_surface->status)) {
return paginated_surface->status;
}
svg_surface->source_id = source_id;
svg_surface->depth = surface->depth + 1;
cairo_rectangle_int_t extents;
cairo_bool_t bounded = _cairo_surface_get_extents (&source->base, &extents);
cairo_surface_set_fallback_resolution (paginated_surface,
document->owner->x_fallback_resolution,
document->owner->y_fallback_resolution);
if (source->base.content == CAIRO_CONTENT_COLOR) {
_cairo_svg_surface_emit_paint (&svg_surface->xml_node, svg_surface, &_cairo_pattern_black.base, FALSE);
}
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;
}
unsigned int clip_id;
if (bounded) {
clip_id = document->clip_id++;
_cairo_svg_stream_printf (&document->xml_node_defs,
"<clipPath id=\"clip-%d\">\n"
"<rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\"/>\n"
"</clipPath>\n",
clip_id,
extents.x,
extents.y,
extents.width,
extents.height);
}
_cairo_svg_stream_printf (&document->xml_node_defs,
"<g id=\"source-%d\"",
source_id);
if (bounded) {
_cairo_svg_stream_printf (&document->xml_node_defs,
" clip-path=\"url(#clip-%d)\"",
clip_id);
}
if (source->base.content == CAIRO_CONTENT_ALPHA) {
_cairo_svg_stream_printf (&document->xml_node_defs,
" filter=\"url(#filter-%s)\"",
_cairo_svg_surface_emit_static_filter (document, CAIRO_SVG_FILTER_REMOVE_COLOR));
}
_cairo_svg_stream_printf (&document->xml_node_defs, ">\n");
if (svg_surface->xml_node.elements.num_elements > 0) {
cairo_svg_page_t *page = _cairo_svg_surface_store_page (svg_surface);
if (unlikely (page == NULL)) {
cairo_surface_destroy (paginated_surface);
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
}
if (svg_surface->page_set.num_elements > 0) {
cairo_svg_page_t *page = _cairo_array_index (&svg_surface->page_set, svg_surface->page_set.num_elements - 1);
_cairo_svg_stream_copy (&page->xml_node, &document->xml_node_defs);
}
_cairo_svg_stream_printf (&document->xml_node_defs, "</g>\n");
*transitive_paint_used = svg_surface->transitive_paint_used;
status = cairo_surface_status (paginated_surface);
cairo_surface_destroy (paginated_surface);
return status;
}
static cairo_recording_surface_t *
_cairo_svg_surface_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_bool_t
_cairo_svg_surface_svg_pattern_should_be_used (const cairo_pattern_t *pattern)
{
cairo_rectangle_int_t extents;
return pattern->type == CAIRO_PATTERN_TYPE_SURFACE &&
pattern->extend == CAIRO_EXTEND_REPEAT &&
_cairo_surface_get_extents (((cairo_surface_pattern_t *) pattern)->surface, &extents);
}
static cairo_bool_t
_cairo_svg_surface_svg_clip_or_svg_mask_should_be_used (const cairo_pattern_t *pattern)
{
return pattern->type == CAIRO_PATTERN_TYPE_SURFACE && !_cairo_svg_surface_svg_pattern_should_be_used (pattern);
}
static cairo_status_t
_cairo_svg_surface_emit_composite_recording_pattern (cairo_svg_stream_t *output,
cairo_svg_surface_t *surface,
cairo_surface_pattern_t *pattern,
unsigned int pattern_id,
const cairo_matrix_t *parent_matrix)
{
cairo_status_t status;
cairo_svg_document_t *document = surface->document;
cairo_matrix_t p2u = pattern->base.matrix;
status = cairo_matrix_invert (&p2u);
/* cairo_pattern_set_matrix ensures the matrix is invertible */
assert (status == CAIRO_STATUS_SUCCESS);
cairo_bool_t is_new;
cairo_svg_source_surface_t *source_surface;
status = _cairo_svg_surface_add_source_surface (surface,
pattern->surface,
&is_new,
&source_surface);
if (unlikely (status)) {
return status;
}
unsigned int source_id = source_surface->id;
cairo_recording_surface_t *recording_surface = _cairo_svg_surface_to_recording_surface (pattern);
if (is_new) {
status = _cairo_svg_surface_emit_recording_surface (surface,
recording_surface,
source_id,
&source_surface->transitive_paint_used);
if (unlikely (status)) {
return status;
}
if (source_surface->transitive_paint_used) {
cairo_svg_paint_t *paint_entry = _cairo_calloc (sizeof (cairo_svg_paint_t));
if (paint_entry == NULL) {
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
paint_entry->source_id = source_id;
_cairo_array_init (&paint_entry->paint_elements, sizeof (cairo_svg_paint_element_t));
_cairo_svg_paint_init_key (paint_entry);
status = _cairo_hash_table_insert (document->paints, &paint_entry->base);
if (unlikely (status)) {
return status;
}
}
}
if (source_surface->transitive_paint_used) {
cairo_svg_paint_t paint_key;
paint_key.source_id = source_id;
_cairo_svg_paint_init_key (&paint_key);
cairo_svg_paint_t *found_paint_entry = _cairo_hash_table_lookup (document->paints,
&paint_key.base);
assert (found_paint_entry);
cairo_svg_paint_element_t paint_element;
paint_element.source_id = surface->source_id;
paint_element.matrix = pattern->base.matrix;
if (parent_matrix != NULL) {
cairo_matrix_t parent_matrix_inverse = *parent_matrix;
status = cairo_matrix_invert (&parent_matrix_inverse);
/* cairo_pattern_set_matrix ensures the matrix is invertible */
assert (status == CAIRO_STATUS_SUCCESS);
cairo_matrix_multiply (&paint_element.matrix, &parent_matrix_inverse, &paint_element.matrix);
}
status = _cairo_array_append (&found_paint_entry->paint_elements, &paint_element);
if (unlikely (status)) {
return status;
}
surface->transitive_paint_used = TRUE;
}
if (pattern_id != invalid_pattern_id) {
assert (!recording_surface->unbounded);
_cairo_svg_stream_printf (output,
"<pattern id=\"pattern-%d\" "
"patternUnits=\"userSpaceOnUse\" "
"x=\"%f\" y=\"%f\" width=\"%f\" height=\"%f\" "
"viewBox=\"%f %f %f %f\"",
pattern_id,
recording_surface->extents_pixels.x,
recording_surface->extents_pixels.y,
recording_surface->extents_pixels.width,
recording_surface->extents_pixels.height,
recording_surface->extents_pixels.x,
recording_surface->extents_pixels.y,
recording_surface->extents_pixels.width,
recording_surface->extents_pixels.height);
_cairo_svg_surface_emit_transform (output, "patternTransform", &p2u, parent_matrix);
_cairo_svg_stream_printf (output, ">\n");
}
_cairo_svg_stream_printf (output,
"<use xlink:href=\"#source-%d\"",
source_id);
if (pattern_id == invalid_pattern_id) {
_cairo_svg_surface_emit_transform (output, "transform", &p2u, parent_matrix);
}
_cairo_svg_stream_printf (output, "/>\n");
if (pattern_id != invalid_pattern_id) {
_cairo_svg_stream_printf (output, "</pattern>\n");
}
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cairo_svg_surface_emit_composite_pattern (cairo_svg_stream_t *output,
cairo_svg_surface_t *surface,
cairo_surface_pattern_t *pattern,
unsigned int pattern_id,
const cairo_matrix_t *parent_matrix)
{
if (pattern_id != invalid_pattern_id) {
assert (_cairo_svg_surface_svg_pattern_should_be_used (&pattern->base));
}
if (pattern->surface->type == CAIRO_SURFACE_TYPE_RECORDING) {
return _cairo_svg_surface_emit_composite_recording_pattern (output,
surface,
pattern,
pattern_id,
parent_matrix);
} else {
return _cairo_svg_surface_emit_composite_surface_pattern (output,
surface,
pattern,
pattern_id,
parent_matrix);
}
}
static cairo_status_t
_cairo_svg_surface_emit_solid_pattern (cairo_svg_surface_t *surface,
cairo_solid_pattern_t *pattern,
cairo_svg_stream_t *output,
cairo_bool_t is_stroke)
{
_cairo_svg_stream_printf (output,
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_svg_stream_t *output,
cairo_bool_t is_stroke,
const cairo_matrix_t *parent_matrix)
{
cairo_svg_document_t *document = surface->document;
cairo_status_t status;
unsigned int pattern_id = document->pattern_id++;
status = _cairo_svg_surface_emit_composite_pattern (&document->xml_node_defs,
surface,
pattern,
pattern_id,
parent_matrix);
if (unlikely (status))
return status;
_cairo_svg_stream_printf (output,
is_stroke ? " stroke=\"url(#pattern-%d)\""
: " fill=\"url(#pattern-%d)\"",
pattern_id);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cairo_svg_surface_emit_pattern_stops (cairo_svg_stream_t *output,
const cairo_gradient_pattern_t *pattern,
double start_offset,
cairo_bool_t reverse_stops,
cairo_bool_t emulate_reflect)
{
cairo_gradient_stop_t *stops;
unsigned int n_stops;
if (pattern->n_stops < 1) {
return CAIRO_STATUS_SUCCESS;
}
if (pattern->n_stops == 1) {
_cairo_svg_stream_printf (output,
"<stop offset=\"%f\" "
"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 (unsigned int 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 *= 0.5;
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 - 0.5 * stops[i + pattern->n_stops - 1].offset;
}
}
}
}
} else {
n_stops = pattern->n_stops;
stops = pattern->stops;
}
if (start_offset >= 0.0) {
for (unsigned int i = 0; i < n_stops; i++) {
_cairo_svg_stream_printf (output,
"<stop offset=\"%f\" "
"stop-color=\"rgb(%f%%, %f%%, %f%%)\" "
"stop-opacity=\"%f\"/>\n",
start_offset + (1.0 - start_offset) * stops[i].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 (unsigned int i = 0; i <= n_stops; i++) {
double x1 = i == n_stops ? stops[0].offset + 1 : stops[i].offset;
cairo_color_stop_t *color1 = i == n_stops ? &stops[0].color : &stops[i].color;
if (x1 >= -start_offset) {
if (i > 0) {
double x0 = stops[i - 1].offset;
cairo_color_stop_t *color0 = &stops[i - 1].color;
if (x0 != x1) {
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_svg_stream_printf (output,
"<stop offset=\"0\" "
"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 (unsigned int i = offset_index; i < n_stops; i++) {
_cairo_svg_stream_printf (output,
"<stop offset=\"%f\" "
"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 (unsigned int i = 0; i < offset_index; i++) {
_cairo_svg_stream_printf (output,
"<stop offset=\"%f\" "
"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_svg_stream_printf (output,
"<stop offset=\"1\" "
"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_svg_stream_t *output,
cairo_pattern_t *pattern)
{
switch (pattern->extend) {
case CAIRO_EXTEND_REPEAT:
_cairo_svg_stream_printf (output, " spreadMethod=\"repeat\"");
break;
case CAIRO_EXTEND_REFLECT:
_cairo_svg_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_svg_stream_t *output,
cairo_bool_t is_stroke,
const cairo_matrix_t *parent_matrix)
{
cairo_status_t status;
cairo_svg_document_t *document = surface->document;
cairo_matrix_t p2u = pattern->base.base.matrix;
status = cairo_matrix_invert (&p2u);
/* cairo_pattern_set_matrix ensures the matrix is invertible */
assert (status == CAIRO_STATUS_SUCCESS);
unsigned int linear_pattern_id = document->linear_pattern_id++;
_cairo_svg_stream_printf (&document->xml_node_defs,
"<linearGradient id=\"linear-pattern-%d\" "
"gradientUnits=\"userSpaceOnUse\" "
"x1=\"%f\" y1=\"%f\" x2=\"%f\" y2=\"%f\"",
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_svg_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_svg_stream_printf (&document->xml_node_defs,
"</linearGradient>\n");
_cairo_svg_stream_printf (output,
is_stroke ? " stroke=\"url(#linear-pattern-%d)\""
: " fill=\"url(#linear-pattern-%d)\"",
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_svg_stream_t *output,
cairo_bool_t is_stroke,
const cairo_matrix_t *parent_matrix)
{
cairo_status_t status;
cairo_svg_document_t *document = surface->document;
cairo_extend_t extend = pattern->base.base.extend;
cairo_bool_t reverse_stops;
cairo_circle_double_t *c0, *c1;
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;
}
double x0 = c0->center.x;
double y0 = c0->center.y;
double r0 = c0->radius;
double x1 = c1->center.x;
double y1 = c1->center.y;
double r1 = c1->radius;
cairo_matrix_t p2u = pattern->base.base.matrix;
status = cairo_matrix_invert (&p2u);
/* cairo_pattern_set_matrix ensures the matrix is invertible */
assert (status == CAIRO_STATUS_SUCCESS);
unsigned int radial_pattern_id = document->radial_pattern_id++;
double start_offset;
cairo_bool_t emulate_reflect = FALSE;
double fx = (r1 * x0 - r0 * x1) / (r1 - r0);
double 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_EXTEND_NONE and CAIRO_EXTEND_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_EXTEND_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_EXTEND_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 = 2.0 * r1 - r0;
emulate_reflect = TRUE;
}
start_offset = fmod (r1, r1 - r0) / (r1 - r0) - 1.0;
double r = r1 - r0;
/* New position of outer circle. */
double x = r * (x1 - fx) / r_org + fx;
double y = r * (y1 - fy) / r_org + fy;
x1 = x;
y1 = y;
r1 = r;
r0 = 0.0;
} else {
start_offset = r0 / r1;
}
_cairo_svg_stream_printf (&document->xml_node_defs,
"<radialGradient id=\"radial-pattern-%d\" "
"gradientUnits=\"userSpaceOnUse\" "
"cx=\"%f\" cy=\"%f\" "
"fx=\"%f\" fy=\"%f\" r=\"%f\"",
radial_pattern_id,
x1, y1,
fx, fy, r1);
if (emulate_reflect) {
_cairo_svg_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_svg_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_svg_stream_printf (&document->xml_node_defs,
"<stop offset=\"0\" "
"stop-color=\"rgb(0%%, 0%%, 0%%)\" "
"stop-opacity=\"0\"/>\n");
if (r0 != 0.0) {
_cairo_svg_stream_printf (&document->xml_node_defs,
"<stop offset=\"%f\" "
"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,
start_offset,
reverse_stops,
emulate_reflect);
if (unlikely (status)) {
return status;
}
if (pattern->base.base.extend == CAIRO_EXTEND_NONE) {
_cairo_svg_stream_printf (&document->xml_node_defs,
"<stop offset=\"1\" "
"stop-color=\"rgb(0%%, 0%%, 0%%)\" "
"stop-opacity=\"0\"/>\n");
}
_cairo_svg_stream_printf (&document->xml_node_defs,
"</radialGradient>\n");
_cairo_svg_stream_printf (output,
is_stroke ? " stroke=\"url(#radial-pattern-%d)\""
: " fill=\"url(#radial-pattern-%d)\"",
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_svg_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_svg_stream_t *output,
cairo_svg_surface_t *surface,
const cairo_pattern_t *source,
cairo_fill_rule_t fill_rule,
const cairo_matrix_t *parent_matrix)
{
_cairo_svg_stream_printf (output,
" fill-rule=\"%s\"",
fill_rule == CAIRO_FILL_RULE_EVEN_ODD ? "evenodd" : "nonzero");
return _cairo_svg_surface_emit_pattern (surface, source, output, FALSE, parent_matrix);
}
static cairo_status_t
_cairo_svg_surface_emit_stroke_style (cairo_svg_stream_t *output,
cairo_svg_surface_t *surface,
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;
}
if (stroke_style->is_hairline) {
_cairo_svg_stream_printf (output,
" stroke-width=\"1px\""
" stroke-linecap=\"%s\""
" stroke-linejoin=\"%s\""
" style=\"vector-effect: non-scaling-stroke\"",
line_cap,
line_join);
} else {
_cairo_svg_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;
}
if (stroke_style->num_dashes > 0) {
_cairo_svg_stream_printf (output, " stroke-dasharray=\"");
for (i = 0; i < stroke_style->num_dashes; i++) {
_cairo_svg_stream_printf (output,
"%f",
stroke_style->dash[i]);
_cairo_svg_stream_printf (output, i + 1 < stroke_style->num_dashes ? " " : "\"");
}
if (stroke_style->dash_offset != 0.0) {
_cairo_svg_stream_printf (output,
" stroke-dashoffset=\"%f\"",
stroke_style->dash_offset);
}
}
_cairo_svg_stream_printf (output,
" stroke-miterlimit=\"%f\"",
stroke_style->miter_limit);
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_svg_stream_t *output,
cairo_svg_surface_t *surface,
const cairo_pattern_t *source,
cairo_bool_t at_origin)
{
cairo_status_t status;
if (_cairo_svg_surface_svg_clip_or_svg_mask_should_be_used (source)) {
return _cairo_svg_surface_emit_composite_pattern (output,
surface,
(cairo_surface_pattern_t *) source,
invalid_pattern_id,
NULL);
}
surface->transitive_paint_used = TRUE;
_cairo_svg_stream_printf (output, "<rect");
if (at_origin) {
_cairo_svg_stream_append_paint_dependent (output,
surface->source_id,
CAIRO_SVG_STREAM_PAINT_DEPENDENT_ELEMENT_TYPE_RECTANGLE_AT_ORIGIN);
} else {
_cairo_svg_stream_append_paint_dependent (output,
surface->source_id,
CAIRO_SVG_STREAM_PAINT_DEPENDENT_ELEMENT_TYPE_RECTANGLE);
}
status = _cairo_svg_surface_emit_pattern (surface, source, output, FALSE, NULL);
if (unlikely (status)) {
return status;
}
_cairo_svg_stream_printf (output, "/>\n");
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
_cairo_svg_surface_do_operator (cairo_svg_stream_t *output,
cairo_svg_surface_t *surface,
cairo_operator_t op,
const cairo_clip_t *clip,
cairo_svg_stream_t *mask_stream,
cairo_svg_stream_t *source_stream,
cairo_svg_stream_t *destination_stream)
{
cairo_status_t status;
cairo_svg_document_t *document = surface->document;
// For operators that do not always produce opaque output, we first need to emit a black paint
// if the content does not have alpha
if (surface->base.content == CAIRO_CONTENT_COLOR && (op == CAIRO_OPERATOR_CLEAR ||
op == CAIRO_OPERATOR_SOURCE ||
op == CAIRO_OPERATOR_IN ||
op == CAIRO_OPERATOR_OUT ||
op == CAIRO_OPERATOR_DEST_IN ||
op == CAIRO_OPERATOR_DEST_OUT ||
op == CAIRO_OPERATOR_DEST_ATOP ||
op == CAIRO_OPERATOR_XOR)) {
_cairo_svg_surface_emit_paint (output, surface, &_cairo_pattern_black.base, FALSE);
}
if (op == CAIRO_OPERATOR_CLEAR) {
/*
* The result is the same as one of the SOURCE operation application with the same arguments,
* but with an empty source.
*/
status = _cairo_svg_stream_destroy (source_stream);
if (unlikely (status)) {
(void) _cairo_svg_stream_destroy (destination_stream);
(void) _cairo_svg_stream_destroy (mask_stream);
return status;
}
cairo_svg_stream_t empty_stream = _cairo_svg_stream_create ();
return _cairo_svg_surface_do_operator (output,
surface,
CAIRO_OPERATOR_SOURCE,
clip,
mask_stream,
&empty_stream,
destination_stream);
}
if (op == CAIRO_OPERATOR_SOURCE) {
/*
* Below we use the "Bounded" equation with SOURCE as the operation from the "Clipping and masking" section
* of https://cairographics.org/operators/:
* result = source LEPR_(clip IN mask) destination
*
* It is equivalent to:
* result = (source IN (clip IN mask)) ADD (destination IN (NOT (clip IN mask)))
*
* 1. We put the clip masked with the mask into the SVG group `lerp_compositing_group`.
* 2. `positive_lerp_mask` is an SVG mask with `lerp_compositing_group`.
* 3. `negative_lerp_mask` is an SVG mask with inverted `lerp_compositing_group`.
* 5. We put the source masked with `positive_lerp_mask` into the SVG group `lerped_source_compositing_group`.
* 6. We put the destination masked with `negative_lerp_mask` into
* the SVG group `lerped_destination_compositing_group`.
* 7. The result is addition of `lerped_source_compositing_group` and `lerped_destination_compositing_group`.
*/
unsigned int lerp_compositing_group_id = document->compositing_group_id++;
_cairo_svg_stream_printf (&document->xml_node_defs,
"<g id=\"compositing-group-%d\"",
lerp_compositing_group_id);
_cairo_svg_stream_append_paint_dependent (&document->xml_node_defs,
surface->source_id,
CAIRO_SVG_STREAM_PAINT_DEPENDENT_ELEMENT_TYPE_INVERSE_TRANSLATION);
_cairo_svg_stream_printf (&document->xml_node_defs, ">\n");
_cairo_svg_surface_emit_paint (&document->xml_node_defs, surface, &_cairo_pattern_clear.base, FALSE);
status = _cairo_svg_surface_set_clip (surface, &document->xml_node_defs, clip);
if (unlikely (status)) {
(void) _cairo_svg_stream_destroy (destination_stream);
(void) _cairo_svg_stream_destroy (source_stream);
(void) _cairo_svg_stream_destroy (mask_stream);
return status;
}
_cairo_svg_stream_copy (mask_stream, &document->xml_node_defs);
status = _cairo_svg_stream_destroy (mask_stream);
if (unlikely (status)) {
(void) _cairo_svg_stream_destroy (destination_stream);
(void) _cairo_svg_stream_destroy (source_stream);
return status;
}
_cairo_svg_surface_reset_clip (surface);
_cairo_svg_stream_printf (&document->xml_node_defs, "</g>\n");
unsigned int positive_lerp_mask_id = document->mask_id++;
_cairo_svg_stream_printf (&document->xml_node_defs,
"<mask id=\"mask-%d\">\n",
positive_lerp_mask_id);
_cairo_svg_stream_printf (&document->xml_node_defs,
"<use xlink:href=\"#compositing-group-%d\"/>\n",
lerp_compositing_group_id);
_cairo_svg_stream_printf (&document->xml_node_defs, "</mask>\n");
unsigned int negative_lerp_mask_id = document->mask_id++;
_cairo_svg_stream_printf (&document->xml_node_defs,
"<mask id=\"mask-%d\">\n",
negative_lerp_mask_id);
_cairo_svg_stream_printf (&document->xml_node_defs,
"<use xlink:href=\"#compositing-group-%d\" filter=\"url(#filter-%s)\"/>\n",
lerp_compositing_group_id,
_cairo_svg_surface_emit_static_filter (document,
CAIRO_SVG_FILTER_REMOVE_COLOR_AND_INVERT_ALPHA));
_cairo_svg_stream_printf (&document->xml_node_defs, "</mask>\n");
unsigned int lerped_source_compositing_group_id = document->compositing_group_id++;
_cairo_svg_stream_printf (&document->xml_node_defs,
"<g id=\"compositing-group-%d\" mask=\"url(#mask-%d)\">\n",
lerped_source_compositing_group_id,
positive_lerp_mask_id);
_cairo_svg_stream_printf (&document->xml_node_defs, "<g");
_cairo_svg_stream_append_paint_dependent (&document->xml_node_defs,
surface->source_id,
CAIRO_SVG_STREAM_PAINT_DEPENDENT_ELEMENT_TYPE_INVERSE_TRANSLATION);
_cairo_svg_stream_printf (&document->xml_node_defs, ">\n");
_cairo_svg_stream_copy (source_stream, &document->xml_node_defs);
status = _cairo_svg_stream_destroy (source_stream);
if (unlikely (status)) {
(void) _cairo_svg_stream_destroy (destination_stream);
return status;
}
_cairo_svg_stream_printf (&document->xml_node_defs, "</g>\n");
_cairo_svg_stream_printf (&document->xml_node_defs, "</g>\n");
unsigned int lerped_destination_compositing_group_id = document->compositing_group_id++;
_cairo_svg_stream_printf (&document->xml_node_defs,
"<g id=\"compositing-group-%d\" mask=\"url(#mask-%d)\">\n",
lerped_destination_compositing_group_id,
negative_lerp_mask_id);
_cairo_svg_stream_printf (&document->xml_node_defs, "<g");
_cairo_svg_stream_append_paint_dependent (&document->xml_node_defs,
surface->source_id,
CAIRO_SVG_STREAM_PAINT_DEPENDENT_ELEMENT_TYPE_INVERSE_TRANSLATION);
_cairo_svg_stream_printf (&document->xml_node_defs, ">\n");
_cairo_svg_stream_copy (destination_stream, &document->xml_node_defs);
status = _cairo_svg_stream_destroy (destination_stream);
if (unlikely (status)) {
return status;
}
_cairo_svg_stream_printf (&document->xml_node_defs, "</g>\n");
_cairo_svg_stream_printf (&document->xml_node_defs, "</g>\n");
_cairo_svg_stream_printf (&surface->xml_node,
"<g filter=\"url(#filter-%d)\"",
_cairo_svg_surface_emit_parametric_filter (surface,
CAIRO_SVG_FILTER_ADD,
lerped_source_compositing_group_id,
lerped_destination_compositing_group_id));
_cairo_svg_stream_append_paint_dependent (&surface->xml_node,
surface->source_id,
CAIRO_SVG_STREAM_PAINT_DEPENDENT_ELEMENT_TYPE_TRANSLATION);
_cairo_svg_stream_printf (&surface->xml_node, ">\n");
status = _cairo_svg_surface_emit_paint (&surface->xml_node, surface, &_cairo_pattern_black.base, TRUE);
if (unlikely (status)) {
return status;
}
_cairo_svg_stream_printf (&surface->xml_node, "</g>\n");
return CAIRO_STATUS_SUCCESS;
}
if (op == CAIRO_OPERATOR_DEST) {
/*
* The result is the destination.
*/
_cairo_svg_stream_copy (destination_stream, &surface->xml_node);
status = _cairo_svg_stream_destroy (destination_stream);
if (unlikely (status)) {
(void) _cairo_svg_stream_destroy (source_stream);
(void) _cairo_svg_stream_destroy (mask_stream);
return status;
}
status = _cairo_svg_stream_destroy (source_stream);
if (unlikely (status)) {
(void) _cairo_svg_stream_destroy (source_stream);
return status;
}
status = _cairo_svg_stream_destroy (source_stream);
if (unlikely (status)) {
return status;
}
return CAIRO_STATUS_SUCCESS;
}
/*
* Below we use the "XRender" equation from the "Clipping and masking" section
* of https://cairographics.org/operators/:
* result = ((source IN mask) OP destination) LERP_clip destination
*
* It is equivalent to:
* result = (((source IN mask) OP destination) IN clip) ADD (destination IN (NOT clip))
*
* 1. We put the clip into the SVG group `lerp_compositing_group`.
* 2. `positive_lerp_mask` is an SVG mask with `lerp_compositing_group`.
* 3. `negative_lerp_mask` is an SVG mask with inverted `lerp_compositing_group`.
* 4. We put the mask into the SVG mask `mask_mask`.
* 5. We put the source masked with `mask_mask` into the SVG group `masked_source_compositing_group`.
* 6. We put the destination into the SVG group `destination_compositing_group`.
* 7. `lerped_operation_compositing_group` is an SVG group of operation applied to
* (`masked_source_compositing_group`, `destination_compositing_group`)
* masked with `positive_lerp_mask`.
* 8. `lerped_destination_compositing_group` is an SVG group of `destination_compositing_group`
* masked with `negative_lerp_mask`.
* 9. The result is addition of `lerped_operation_compositing_group` and `lerped_destination_compositing_group`.
*/
unsigned int lerp_compositing_group_id = document->compositing_group_id++;
_cairo_svg_stream_printf (&document->xml_node_defs,
"<g id=\"compositing-group-%d\"",
lerp_compositing_group_id);
_cairo_svg_stream_append_paint_dependent (&document->xml_node_defs,
surface->source_id,
CAIRO_SVG_STREAM_PAINT_DEPENDENT_ELEMENT_TYPE_INVERSE_TRANSLATION);
_cairo_svg_stream_printf (&document->xml_node_defs, ">\n");
_cairo_svg_surface_emit_paint (&document->xml_node_defs, surface, &_cairo_pattern_clear.base, FALSE);
status = _cairo_svg_surface_set_clip (surface, &document->xml_node_defs, clip);
if (unlikely (status)) {
(void) _cairo_svg_stream_destroy (destination_stream);
(void) _cairo_svg_stream_destroy (source_stream);
(void) _cairo_svg_stream_destroy (mask_stream);
return status;
}
status = _cairo_svg_surface_emit_paint (&document->xml_node_defs, surface, &_cairo_pattern_white.base, FALSE);
if (unlikely (status)) {
(void) _cairo_svg_stream_destroy (destination_stream);
(void) _cairo_svg_stream_destroy (source_stream);
(void) _cairo_svg_stream_destroy (mask_stream);
return status;
}
_cairo_svg_surface_reset_clip (surface);
_cairo_svg_stream_printf (&document->xml_node_defs, "</g>\n");
unsigned int positive_lerp_mask_id = document->mask_id++;
_cairo_svg_stream_printf (&document->xml_node_defs,
"<mask id=\"mask-%d\">\n",
positive_lerp_mask_id);
_cairo_svg_stream_printf (&document->xml_node_defs,
"<use xlink:href=\"#compositing-group-%d\"/>\n",
lerp_compositing_group_id);
_cairo_svg_stream_printf (&document->xml_node_defs, "</mask>\n");
unsigned int negative_lerp_mask_id = document->mask_id++;
_cairo_svg_stream_printf (&document->xml_node_defs,
"<mask id=\"mask-%d\">\n",
negative_lerp_mask_id);
_cairo_svg_stream_printf (&document->xml_node_defs,
"<use xlink:href=\"#compositing-group-%d\" filter=\"url(#filter-%s)\"/>\n",
lerp_compositing_group_id,
_cairo_svg_surface_emit_static_filter (document,
CAIRO_SVG_FILTER_REMOVE_COLOR_AND_INVERT_ALPHA));
_cairo_svg_stream_printf (&document->xml_node_defs, "</mask>\n");
unsigned int mask_mask_id = document->mask_id++;
_cairo_svg_stream_printf (&document->xml_node_defs,
"<mask id=\"mask-%d\">\n",
mask_mask_id);
_cairo_svg_stream_printf (&document->xml_node_defs, "<g");
_cairo_svg_stream_append_paint_dependent (&document->xml_node_defs,
surface->source_id,
CAIRO_SVG_STREAM_PAINT_DEPENDENT_ELEMENT_TYPE_INVERSE_TRANSLATION);
_cairo_svg_stream_printf (&document->xml_node_defs, ">\n");
_cairo_svg_stream_copy (mask_stream, &document->xml_node_defs);
status = _cairo_svg_stream_destroy (mask_stream);
if (unlikely (status)) {
(void) _cairo_svg_stream_destroy (source_stream);
(void) _cairo_svg_stream_destroy (destination_stream);
return status;
}
_cairo_svg_stream_printf (&document->xml_node_defs, "</g>\n");
_cairo_svg_stream_printf (&document->xml_node_defs, "</mask>\n");
unsigned int masked_source_compositing_group_id = document->compositing_group_id++;
_cairo_svg_stream_printf (&document->xml_node_defs,
"<g id=\"compositing-group-%d\" mask=\"url(#mask-%d)\">\n",
masked_source_compositing_group_id,
mask_mask_id);
_cairo_svg_stream_printf (&document->xml_node_defs, "<g");
_cairo_svg_stream_append_paint_dependent (&document->xml_node_defs,
surface->source_id,
CAIRO_SVG_STREAM_PAINT_DEPENDENT_ELEMENT_TYPE_INVERSE_TRANSLATION);
_cairo_svg_stream_printf (&document->xml_node_defs, ">\n");
_cairo_svg_stream_copy (source_stream, &document->xml_node_defs);
status = _cairo_svg_stream_destroy (source_stream);
if (unlikely (status)) {
(void) _cairo_svg_stream_destroy (destination_stream);
return status;
}
_cairo_svg_stream_printf (&document->xml_node_defs, "</g>\n");
_cairo_svg_stream_printf (&document->xml_node_defs, "</g>\n");
unsigned int destination_compositing_group_id = document->compositing_group_id++;
_cairo_svg_stream_printf (&document->xml_node_defs,
"<g id=\"compositing-group-%d\"",
destination_compositing_group_id);
_cairo_svg_stream_append_paint_dependent (&document->xml_node_defs,
surface->source_id,
CAIRO_SVG_STREAM_PAINT_DEPENDENT_ELEMENT_TYPE_INVERSE_TRANSLATION);
_cairo_svg_stream_printf (&document->xml_node_defs, ">\n");
_cairo_svg_stream_copy (destination_stream, &document->xml_node_defs);
status = _cairo_svg_stream_destroy (destination_stream);
if (unlikely (status)) {
return status;
}
_cairo_svg_stream_printf (&document->xml_node_defs, "</g>\n");
unsigned int lerped_operation_compositing_group_id = document->compositing_group_id++;
_cairo_svg_stream_printf (&document->xml_node_defs,
"<g id=\"compositing-group-%d\"",
lerped_operation_compositing_group_id);
unsigned int filter_id;
switch (op) {
case CAIRO_OPERATOR_CLEAR:
case CAIRO_OPERATOR_SOURCE:
case CAIRO_OPERATOR_OVER:
ASSERT_NOT_REACHED;
case CAIRO_OPERATOR_IN:
filter_id = _cairo_svg_surface_emit_parametric_filter (surface,
CAIRO_SVG_FILTER_IN,
masked_source_compositing_group_id,
destination_compositing_group_id);
break;
case CAIRO_OPERATOR_OUT:
filter_id = _cairo_svg_surface_emit_parametric_filter (surface,
CAIRO_SVG_FILTER_OUT,
masked_source_compositing_group_id,
destination_compositing_group_id);
break;
case CAIRO_OPERATOR_ATOP:
filter_id = _cairo_svg_surface_emit_parametric_filter (surface,
CAIRO_SVG_FILTER_ATOP,
masked_source_compositing_group_id,
destination_compositing_group_id);
break;
case CAIRO_OPERATOR_DEST:
ASSERT_NOT_REACHED;
case CAIRO_OPERATOR_DEST_OVER:
filter_id = _cairo_svg_surface_emit_parametric_filter (surface,
CAIRO_SVG_FILTER_OVER,
destination_compositing_group_id,
masked_source_compositing_group_id);
break;
case CAIRO_OPERATOR_DEST_IN:
filter_id = _cairo_svg_surface_emit_parametric_filter (surface,
CAIRO_SVG_FILTER_IN,
destination_compositing_group_id,
masked_source_compositing_group_id);
break;
case CAIRO_OPERATOR_DEST_OUT:
filter_id = _cairo_svg_surface_emit_parametric_filter (surface,
CAIRO_SVG_FILTER_OUT,
destination_compositing_group_id,
masked_source_compositing_group_id);
break;
case CAIRO_OPERATOR_DEST_ATOP:
filter_id = _cairo_svg_surface_emit_parametric_filter (surface,
CAIRO_SVG_FILTER_ATOP,
destination_compositing_group_id,
masked_source_compositing_group_id);
break;
case CAIRO_OPERATOR_XOR:
filter_id = _cairo_svg_surface_emit_parametric_filter (surface,
CAIRO_SVG_FILTER_XOR,
masked_source_compositing_group_id,
destination_compositing_group_id);
break;
case CAIRO_OPERATOR_ADD:
filter_id = _cairo_svg_surface_emit_parametric_filter (surface,
CAIRO_SVG_FILTER_ADD,
masked_source_compositing_group_id,
destination_compositing_group_id);
break;
case CAIRO_OPERATOR_SATURATE:
ASSERT_NOT_REACHED;
case CAIRO_OPERATOR_MULTIPLY:
filter_id = _cairo_svg_surface_emit_parametric_filter (surface,
CAIRO_SVG_FILTER_MULTIPLY,
masked_source_compositing_group_id,
destination_compositing_group_id);
break;
case CAIRO_OPERATOR_SCREEN:
filter_id = _cairo_svg_surface_emit_parametric_filter (surface,
CAIRO_SVG_FILTER_SCREEN,
masked_source_compositing_group_id,
destination_compositing_group_id);
break;
case CAIRO_OPERATOR_OVERLAY:
filter_id = _cairo_svg_surface_emit_parametric_filter (surface,
CAIRO_SVG_FILTER_OVERLAY,
masked_source_compositing_group_id,
destination_compositing_group_id);
break;
case CAIRO_OPERATOR_DARKEN:
filter_id = _cairo_svg_surface_emit_parametric_filter (surface,
CAIRO_SVG_FILTER_DARKEN,
masked_source_compositing_group_id,
destination_compositing_group_id);
break;
case CAIRO_OPERATOR_LIGHTEN:
filter_id = _cairo_svg_surface_emit_parametric_filter (surface,
CAIRO_SVG_FILTER_LIGHTEN,
masked_source_compositing_group_id,
destination_compositing_group_id);
break;
case CAIRO_OPERATOR_COLOR_DODGE:
filter_id = _cairo_svg_surface_emit_parametric_filter (surface,
CAIRO_SVG_FILTER_COLOR_DODGE,
masked_source_compositing_group_id,
destination_compositing_group_id);
break;
case CAIRO_OPERATOR_COLOR_BURN:
filter_id = _cairo_svg_surface_emit_parametric_filter (surface,
CAIRO_SVG_FILTER_COLOR_BURN,
masked_source_compositing_group_id,
destination_compositing_group_id);
break;
case CAIRO_OPERATOR_HARD_LIGHT:
filter_id = _cairo_svg_surface_emit_parametric_filter (surface,
CAIRO_SVG_FILTER_HARD_LIGHT,
masked_source_compositing_group_id,
destination_compositing_group_id);
break;
case CAIRO_OPERATOR_SOFT_LIGHT:
filter_id = _cairo_svg_surface_emit_parametric_filter (surface,
CAIRO_SVG_FILTER_SOFT_LIGHT,
masked_source_compositing_group_id,
destination_compositing_group_id);
break;
case CAIRO_OPERATOR_DIFFERENCE:
filter_id = _cairo_svg_surface_emit_parametric_filter (surface,
CAIRO_SVG_FILTER_DIFFERENCE,
masked_source_compositing_group_id,
destination_compositing_group_id);
break;
case CAIRO_OPERATOR_EXCLUSION:
filter_id = _cairo_svg_surface_emit_parametric_filter (surface,
CAIRO_SVG_FILTER_EXCLUSION,
masked_source_compositing_group_id,
destination_compositing_group_id);
break;
case CAIRO_OPERATOR_HSL_HUE:
filter_id = _cairo_svg_surface_emit_parametric_filter (surface,
CAIRO_SVG_FILTER_HUE,
masked_source_compositing_group_id,
destination_compositing_group_id);
break;
case CAIRO_OPERATOR_HSL_SATURATION:
filter_id = _cairo_svg_surface_emit_parametric_filter (surface,
CAIRO_SVG_FILTER_SATURATION,
masked_source_compositing_group_id,
destination_compositing_group_id);
break;
case CAIRO_OPERATOR_HSL_COLOR:
filter_id = _cairo_svg_surface_emit_parametric_filter (surface,
CAIRO_SVG_FILTER_COLOR,
masked_source_compositing_group_id,
destination_compositing_group_id);
break;
case CAIRO_OPERATOR_HSL_LUMINOSITY:
filter_id = _cairo_svg_surface_emit_parametric_filter (surface,
CAIRO_SVG_FILTER_LUMINOSITY,
masked_source_compositing_group_id,
destination_compositing_group_id);
break;
default:
ASSERT_NOT_REACHED;
}
_cairo_svg_stream_printf (&document->xml_node_defs,
" filter=\"url(#filter-%d)\" mask=\"url(#mask-%d)\">\n",
filter_id,
positive_lerp_mask_id);
status = _cairo_svg_surface_emit_paint (&document->xml_node_defs, surface, &_cairo_pattern_black.base, TRUE);
if (unlikely (status)) {
return status;
}
_cairo_svg_stream_printf (&document->xml_node_defs, "</g>\n");
unsigned int lerped_destination_compositing_group_id = document->compositing_group_id++;
_cairo_svg_stream_printf (&document->xml_node_defs,
"<g id=\"compositing-group-%d\" mask=\"url(#mask-%d)\">\n",
lerped_destination_compositing_group_id,
negative_lerp_mask_id);
_cairo_svg_stream_printf (&document->xml_node_defs,
"<use xlink:href=\"#compositing-group-%d\"/>\n",
destination_compositing_group_id);
_cairo_svg_stream_printf (&document->xml_node_defs, "</g>\n");
_cairo_svg_stream_printf (&surface->xml_node,
"<g filter=\"url(#filter-%d)\"",
_cairo_svg_surface_emit_parametric_filter (surface,
CAIRO_SVG_FILTER_ADD,
lerped_operation_compositing_group_id,
lerped_destination_compositing_group_id));
_cairo_svg_stream_append_paint_dependent (&surface->xml_node,
surface->source_id,
CAIRO_SVG_STREAM_PAINT_DEPENDENT_ELEMENT_TYPE_TRANSLATION);
_cairo_svg_stream_printf (&surface->xml_node, ">\n");
status = _cairo_svg_surface_emit_paint (&surface->xml_node, surface, &_cairo_pattern_black.base, TRUE);
if (unlikely (status)) {
return status;
}
_cairo_svg_stream_printf (&surface->xml_node, "</g>\n");
return CAIRO_STATUS_SUCCESS;
}
#define _CAIRO_SVG_SURFACE_CALL_OPERATOR_IMPL(OPERATOR_IMPL, SOURCE, ...) \
if (op == CAIRO_OPERATOR_OVER) { \
status = _cairo_svg_surface_set_clip (surface, &surface->xml_node, clip); \
if (unlikely (status)) { \
return status; \
} \
return OPERATOR_IMPL (&surface->xml_node, surface, SOURCE, ## __VA_ARGS__); \
} else { \
_cairo_svg_surface_reset_clip (surface); \
cairo_svg_stream_t mask_stream = _cairo_svg_stream_create (); \
status = OPERATOR_IMPL (&mask_stream, surface, &_cairo_pattern_white.base, ## __VA_ARGS__); \
if (unlikely (status)) { \
(void) _cairo_svg_stream_destroy (&mask_stream); \
return status; \
} \
cairo_svg_stream_t source_stream = _cairo_svg_stream_create (); \
status = _cairo_svg_surface_emit_paint (&source_stream, \
surface, \
SOURCE, \
FALSE); \
if (unlikely (status)) { \
(void) _cairo_svg_stream_destroy (&source_stream); \
(void) _cairo_svg_stream_destroy (&mask_stream); \
return status; \
} \
cairo_svg_stream_t destination_stream = surface->xml_node; \
surface->xml_node = _cairo_svg_stream_create (); \
return _cairo_svg_surface_do_operator (&surface->xml_node, \
surface, \
op, \
clip, \
&mask_stream, \
&source_stream, \
&destination_stream); \
}
static cairo_int_status_t
_cairo_svg_surface_paint_impl (cairo_svg_stream_t *output,
cairo_svg_surface_t *surface,
const cairo_pattern_t *source)
{
return _cairo_svg_surface_emit_paint (output, surface, source, FALSE);
}
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_ANALYZE:
return CAIRO_STATUS_SUCCESS;
case CAIRO_PAGINATED_MODE_RENDER:
status = _cairo_svg_stream_destroy (&surface->xml_node);
if (unlikely (status)) {
return status;
}
surface->xml_node = _cairo_svg_stream_create ();
if (op == CAIRO_OPERATOR_CLEAR) {
return CAIRO_STATUS_SUCCESS;
}
break;
case CAIRO_PAGINATED_MODE_FALLBACK:
ASSERT_NOT_REACHED;
}
} else if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE) {
return _cairo_svg_surface_are_operation_and_pattern_supported (surface, op, source)
? CAIRO_STATUS_SUCCESS
: CAIRO_INT_STATUS_UNSUPPORTED;
}
_CAIRO_SVG_SURFACE_CALL_OPERATOR_IMPL (_cairo_svg_surface_paint_impl,
source)
}
static cairo_int_status_t
_cairo_svg_surface_mask_impl (cairo_svg_stream_t *output,
cairo_svg_surface_t *surface,
const cairo_pattern_t *source,
const cairo_pattern_t *mask)
{
cairo_status_t status;
cairo_svg_document_t *document = surface->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. */
cairo_svg_stream_t temporary_stream = _cairo_svg_stream_create ();
unsigned int mask_id = document->mask_id++;
_cairo_svg_stream_printf (&temporary_stream,
"<mask id=\"mask-%d\">\n",
mask_id);
_cairo_svg_stream_printf (&temporary_stream,
"<g filter=\"url(#filter-%s)\">\n",
_cairo_svg_surface_emit_static_filter (document, CAIRO_SVG_FILTER_REMOVE_COLOR));
status = _cairo_svg_surface_emit_paint (&temporary_stream, surface, mask, FALSE);
if (unlikely (status)) {
(void) _cairo_svg_stream_destroy (&temporary_stream);
return status;
}
_cairo_svg_stream_printf (&temporary_stream, "</g>\n");
_cairo_svg_stream_printf (&temporary_stream, "</mask>\n");
_cairo_svg_stream_copy (&temporary_stream, &document->xml_node_defs);
status = _cairo_svg_stream_destroy (&temporary_stream);
if (unlikely (status)) {
return status;
}
_cairo_svg_stream_printf (output,
"<g mask=\"url(#mask-%d)\">\n",
mask_id);
status = _cairo_svg_surface_emit_paint (output, surface, source, FALSE);
if (unlikely (status)) {
return status;
}
_cairo_svg_stream_printf (output, "</g>\n");
return CAIRO_STATUS_SUCCESS;
}
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;
if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE) {
return _cairo_svg_surface_are_operation_and_pattern_supported (surface, op, source) &&
_cairo_svg_surface_are_operation_and_pattern_supported (surface, op, mask)
? CAIRO_STATUS_SUCCESS
: CAIRO_INT_STATUS_UNSUPPORTED;
}
_CAIRO_SVG_SURFACE_CALL_OPERATOR_IMPL (_cairo_svg_surface_mask_impl,
source,
mask)
}
static cairo_int_status_t
_cairo_svg_surface_stroke_impl (cairo_svg_stream_t *output,
cairo_svg_surface_t *surface,
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)
{
cairo_status_t status;
cairo_bool_t svg_clip_or_svg_mask_should_be_used = _cairo_svg_surface_svg_clip_or_svg_mask_should_be_used (source);
unsigned int mask_id;
cairo_svg_stream_t *output_stream = output;
if (svg_clip_or_svg_mask_should_be_used) {
mask_id = surface->document->mask_id++;
output_stream = &surface->document->xml_node_defs;
_cairo_svg_stream_printf (output_stream,
"<mask id=\"mask-%d\">\n",
mask_id);
}
_cairo_svg_stream_printf (output_stream, "<path fill=\"none\"");
status = _cairo_svg_surface_emit_stroke_style (output_stream,
surface,
svg_clip_or_svg_mask_should_be_used ? &_cairo_pattern_white.base
: source,
stroke_style,
ctm_inverse);
if (unlikely (status)) {
return status;
}
_cairo_svg_surface_emit_path (output_stream, path, ctm_inverse);
_cairo_svg_surface_emit_transform (output_stream, "transform", ctm, NULL);
_cairo_svg_stream_printf (output_stream, "/>\n");
if (svg_clip_or_svg_mask_should_be_used) {
_cairo_svg_stream_printf (output_stream, "</mask>\n");
_cairo_svg_stream_printf (output,
"<g mask=\"url(#mask-%d)\">\n",
mask_id);
status = _cairo_svg_surface_emit_composite_pattern (output,
surface,
(cairo_surface_pattern_t *) source,
invalid_pattern_id,
NULL);
if (unlikely (status)) {
return status;
}
_cairo_svg_stream_printf (output, "</g>\n");
}
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_are_operation_and_pattern_supported (surface, op, source)
? CAIRO_STATUS_SUCCESS
: CAIRO_INT_STATUS_UNSUPPORTED;
}
_CAIRO_SVG_SURFACE_CALL_OPERATOR_IMPL (_cairo_svg_surface_stroke_impl,
source,
path,
stroke_style,
ctm,
ctm_inverse,
tolerance,
antialias)
}
static cairo_int_status_t
_cairo_svg_surface_fill_impl (cairo_svg_stream_t *output,
cairo_svg_surface_t *surface,
const cairo_pattern_t *source,
const cairo_path_fixed_t *path,
cairo_fill_rule_t fill_rule,
double tolerance,
cairo_antialias_t antialias)
{
cairo_status_t status;
if (_cairo_svg_surface_svg_clip_or_svg_mask_should_be_used (source)) {
_cairo_svg_stream_printf (&surface->document->xml_node_defs,
"<clipPath id=\"clip-%d\">\n",
surface->document->clip_id);
_cairo_svg_stream_printf (&surface->document->xml_node_defs,
"<path clip-rule=\"%s\"",
fill_rule == CAIRO_FILL_RULE_EVEN_ODD ? "evenodd" : "nonzero");
_cairo_svg_surface_emit_path (&surface->document->xml_node_defs, path, NULL);
_cairo_svg_stream_printf (&surface->document->xml_node_defs, "/>\n");
_cairo_svg_stream_printf (&surface->document->xml_node_defs, "</clipPath>\n");
_cairo_svg_stream_printf (output,
"<g clip-path=\"url(#clip-%d)\">\n",
surface->document->clip_id++);
status = _cairo_svg_surface_emit_composite_pattern (output,
surface,
(cairo_surface_pattern_t *) source,
invalid_pattern_id,
NULL);
if (unlikely (status)) {
return status;
}
_cairo_svg_stream_printf (output, "</g>");
} else {
_cairo_svg_stream_printf (output, "<path");
status = _cairo_svg_surface_emit_fill_style (output, surface, source, fill_rule, NULL);
if (unlikely (status)) {
return status;
}
_cairo_svg_surface_emit_path (output, path, NULL);
_cairo_svg_stream_printf (output, "/>\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_are_operation_and_pattern_supported (surface, op, source)
? CAIRO_STATUS_SUCCESS
: CAIRO_INT_STATUS_UNSUPPORTED;
}
_CAIRO_SVG_SURFACE_CALL_OPERATOR_IMPL (_cairo_svg_surface_fill_impl,
source,
path,
fill_rule,
tolerance,
antialias)
}
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;
if (_cairo_svg_surface_svg_clip_or_svg_mask_should_be_used (fill_source) ||
_cairo_svg_surface_svg_clip_or_svg_mask_should_be_used (stroke_source) ||
fill_op != CAIRO_OPERATOR_OVER ||
stroke_op != CAIRO_OPERATOR_OVER) {
return CAIRO_INT_STATUS_UNSUPPORTED;
}
if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE) {
return _cairo_svg_surface_are_operation_and_pattern_supported (surface, fill_op, fill_source)
&& _cairo_svg_surface_are_operation_and_pattern_supported (surface, stroke_op, stroke_source)
? CAIRO_STATUS_SUCCESS
: CAIRO_INT_STATUS_UNSUPPORTED;
}
status = _cairo_svg_surface_set_clip (surface, &surface->xml_node, clip);
if (unlikely (status)) {
return status;
}
_cairo_svg_stream_printf (&surface->xml_node, "<path");
status = _cairo_svg_surface_emit_fill_style (&surface->xml_node, surface,
fill_source, fill_rule, stroke_ctm_inverse);
if (unlikely (status)) {
return status;
}
status = _cairo_svg_surface_emit_stroke_style (&surface->xml_node, surface,
stroke_source, stroke_style, stroke_ctm_inverse);
if (unlikely (status)) {
return status;
}
_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_svg_stream_printf (&surface->xml_node, "/>\n");
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
_cairo_svg_surface_show_glyphs_impl (cairo_svg_stream_t *output,
cairo_svg_surface_t *surface,
const cairo_pattern_t *source,
cairo_glyph_t *glyphs,
int num_glyphs,
cairo_scaled_font_t *scaled_font)
{
cairo_status_t status;
cairo_svg_document_t *document = surface->document;
if (num_glyphs <= 0) {
return CAIRO_STATUS_SUCCESS;
}
/* FIXME it's probably possible to apply a source 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 (source->type != CAIRO_PATTERN_TYPE_SOLID) {
goto fallback;
}
_cairo_svg_stream_printf (output, "<g");
status = _cairo_svg_surface_emit_pattern (surface, source, output, FALSE, NULL);
if (unlikely (status)) {
return status;
}
_cairo_svg_stream_printf (output, ">\n");
for (int i = 0; i < num_glyphs; i++) {
cairo_scaled_font_subsets_glyph_t subset_glyph;
status = _cairo_scaled_font_subsets_map_glyph (document->font_subsets,
scaled_font,
glyphs[i].index,
NULL,
0,
&subset_glyph);
if ((cairo_int_status_t) status == CAIRO_INT_STATUS_UNSUPPORTED) {
_cairo_svg_stream_printf (output, "</g>\n");
glyphs += i;
num_glyphs -= i;
goto fallback;
}
if (unlikely (status)) {
return status;
}
_cairo_svg_stream_printf (output,
"<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_svg_stream_printf (output, "</g>\n");
return CAIRO_STATUS_SUCCESS;
fallback:;
cairo_path_fixed_t path;
_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_impl (output,
surface,
source,
&path,
CAIRO_FILL_RULE_WINDING,
0.0,
CAIRO_ANTIALIAS_DEFAULT);
_cairo_path_fixed_fini (&path);
return status;
}
static cairo_int_status_t
_cairo_svg_surface_show_glyphs (void *abstract_surface,
cairo_operator_t op,
const cairo_pattern_t *source,
cairo_glyph_t *glyphs,
int num_glyphs,
cairo_scaled_font_t *scaled_font,
const cairo_clip_t *clip)
{
cairo_svg_surface_t *surface = abstract_surface;
cairo_int_status_t status;
if (surface->paginated_mode == CAIRO_PAGINATED_MODE_ANALYZE) {
return _cairo_svg_surface_are_operation_and_pattern_supported (surface, op, source)
? CAIRO_STATUS_SUCCESS
: CAIRO_INT_STATUS_UNSUPPORTED;
}
_CAIRO_SVG_SURFACE_CALL_OPERATOR_IMPL (_cairo_svg_surface_show_glyphs_impl,
source,
glyphs,
num_glyphs,
scaled_font)
}
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;
if (output_stream->status) {
return output_stream->status;
}
document = _cairo_calloc (sizeof (cairo_svg_document_t));
if (unlikely (document == NULL)) {
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
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_USER;
document->xml_node_defs = _cairo_svg_stream_create ();
document->xml_node_glyphs = _cairo_svg_stream_create ();
document->xml_node_filters = _cairo_svg_stream_create ();
document->linear_pattern_id = 0;
document->radial_pattern_id = 0;
document->pattern_id = 0;
document->clip_id = 0;
document->mask_id = 0;
document->compositing_group_id = 0;
document->filter_id = 0;
for (enum cairo_svg_filter filter = 0; filter < CAIRO_SVG_FILTER_LAST_STATIC_FILTER; filter++) {
document->filters_emitted[filter] = FALSE;
}
document->svg_version = version;
/* 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)) {
(void) _cairo_svg_stream_destroy(&document->xml_node_defs);
(void) _cairo_svg_stream_destroy(&document->xml_node_glyphs);
(void) _cairo_svg_stream_destroy(&document->xml_node_filters);
free (document);
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
document->paints = _cairo_hash_table_create (_cairo_svg_paint_equal);
if (unlikely (document->paints == NULL)) {
(void) _cairo_svg_stream_destroy(&document->xml_node_defs);
(void) _cairo_svg_stream_destroy(&document->xml_node_glyphs);
(void) _cairo_svg_stream_destroy(&document->xml_node_filters);
_cairo_scaled_font_subsets_destroy (document->font_subsets);
free (document);
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
*document_out = document;
return CAIRO_STATUS_SUCCESS;
}
static cairo_svg_document_t *
_cairo_svg_document_reference (cairo_svg_document_t *document)
{
document->refcount++;
return document;
}
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)
{
if (document->finished) {
return CAIRO_STATUS_SUCCESS;
}
document->finished = TRUE;
cairo_status_t status, final_status = CAIRO_STATUS_SUCCESS;
cairo_output_stream_t *output = document->output_stream;
/*
* Should we add DOCTYPE?
*
* Google says no.
*
* http://tech.groups.yahoo.com/group/svg-developers/message/48562:
* 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.
*
* http://jwatt.org/svg/authoring/:
* 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"
"<svg xmlns=\"http://www.w3.org/2000/svg\" "
"xmlns:xlink=\"http://www.w3.org/1999/xlink\" "
"width=\"%f%s\" height=\"%f%s\" "
"viewBox=\"0 0 %f %f\">\n",
document->width, _cairo_svg_unit_strings[document->unit],
document->height, _cairo_svg_unit_strings[document->unit],
document->width, document->height);
status = _cairo_svg_document_emit_font_subsets (document);
if (final_status == CAIRO_STATUS_SUCCESS) {
final_status = status;
}
cairo_svg_surface_t *surface = NULL;
if (document->owner != NULL) {
surface = (cairo_svg_surface_t *) _cairo_paginated_surface_get_target (document->owner);
if (surface->xml_node.elements.num_elements > 0) {
cairo_svg_page_t *page = _cairo_svg_surface_store_page (surface);
if (final_status == CAIRO_STATUS_SUCCESS && page == NULL) {
final_status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
}
if (surface->transitive_paint_used) {
cairo_svg_paint_t *paint_entry = _cairo_calloc (sizeof (cairo_svg_paint_t));
if (paint_entry == NULL) {
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
paint_entry->source_id = surface->source_id;
paint_entry->box.p1.x = 0;
paint_entry->box.p1.y = 0;
paint_entry->box.p2.x = document->width;
paint_entry->box.p2.y = document->height;
_cairo_svg_paint_box_add_padding (&paint_entry->box);
_cairo_array_init (&paint_entry->paint_elements, sizeof (cairo_svg_paint_element_t));
_cairo_svg_paint_init_key (paint_entry);
status = _cairo_hash_table_insert (document->paints, &paint_entry->base);
if (unlikely (status)) {
return status;
}
}
}
_cairo_hash_table_foreach (document->paints, _cairo_svg_paint_compute_func, document);
if (document->xml_node_filters.elements.num_elements > 0 ||
document->xml_node_glyphs.elements.num_elements > 0 ||
document->xml_node_defs.elements.num_elements > 0) {
_cairo_output_stream_printf (output, "<defs>\n");
_cairo_svg_stream_copy_to_output_stream (&document->xml_node_filters, output, document->paints);
if (document->xml_node_glyphs.elements.num_elements > 0) {
_cairo_output_stream_printf (output, "<g>\n");
_cairo_svg_stream_copy_to_output_stream (&document->xml_node_glyphs, output, document->paints);
_cairo_output_stream_printf (output, "</g>\n");
}
_cairo_svg_stream_copy_to_output_stream (&document->xml_node_defs, output, document->paints);
_cairo_output_stream_printf (output, "</defs>\n");
}
if (document->owner != NULL) {
if (surface->page_set.num_elements == 1) {
cairo_svg_page_t *page = _cairo_array_index (&surface->page_set, 0);
_cairo_svg_stream_copy_to_output_stream (&page->xml_node, output, document->paints);
} else if (surface->page_set.num_elements > 1) {
_cairo_output_stream_printf (output, "<pageSet>\n");
for (unsigned int i = 0; i < surface->page_set.num_elements; i++) {
cairo_svg_page_t *page = _cairo_array_index (&surface->page_set, i);
_cairo_output_stream_printf (output, "<page>\n");
_cairo_svg_stream_copy_to_output_stream (&page->xml_node, output, document->paints);
_cairo_output_stream_printf (output, "</page>\n");
}
_cairo_output_stream_printf (output, "</pageSet>\n");
}
}
_cairo_output_stream_printf (output, "</svg>\n");
status = _cairo_svg_stream_destroy (&document->xml_node_defs);
if (final_status == CAIRO_STATUS_SUCCESS) {
final_status = status;
}
status = _cairo_svg_stream_destroy (&document->xml_node_glyphs);
if (final_status == CAIRO_STATUS_SUCCESS) {
final_status = status;
}
status = _cairo_svg_stream_destroy (&document->xml_node_filters);
if (final_status == CAIRO_STATUS_SUCCESS) {
final_status = status;
}
_cairo_hash_table_foreach (document->paints, _cairo_svg_paint_pluck, document->paints);
_cairo_hash_table_destroy (document->paints);
status = _cairo_output_stream_destroy (output);
if (final_status == CAIRO_STATUS_SUCCESS) {
final_status = status;
}
return final_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)
{
return TRUE;
}
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,
};
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