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cairo-vg-surface.c
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/* -*- Mode: c; tab-width: 8; c-basic-offset: 4; indent-tabs-mode: t; -*- */
/* cairo - a vector graphics library with display and print output
*
* Copyright © 2008 Opened Hand Ltd.
* Copyright © 2009 Chris Wilson
*
* 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.og/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.
*
* Contributor(s):
* Pierre Tardy <[email protected]>
* Øyvind Kolås <[email protected]>
* Vladimi Vukicevic <[email protected]> (stubbed out base backend)
* Chris Wilson <[email protected]>
*/
#include "cairoint.h"
#include "cairo-vg.h"
#include "cairo-cache-private.h"
#include "cairo-default-context-private.h"
#include "cairo-error-private.h"
#include "cairo-image-surface-private.h"
#include "cairo-path-fixed-private.h"
#include "cairo-recording-surface-inline.h"
#include "cairo-surface-clipper-private.h"
#include <pixman.h>
#include <VG/openvg.h>
//#define OPENVG_DEBUG
/*
* Work that needs to be done:
* - Glyph cache / proper font support
*
* - First-class paths
* Paths are expensive for OpenVG, reuse paths whenever possible.
* So add a path cache, and first class paths!
*/
typedef struct _cairo_vg_surface cairo_vg_surface_t;
/* XXX need GL specific context control. :( */
struct _cairo_vg_context {
cairo_status_t status;
cairo_reference_count_t ref_count;
unsigned long target_id;
VGPaint paint;
cairo_vg_surface_t *source;
double alpha;
cairo_cache_t snapshot_cache;
void *display;
void *context;
cairo_status_t (*create_target) (cairo_vg_context_t *,
cairo_vg_surface_t *);
cairo_status_t (*set_target) (cairo_vg_context_t *,
cairo_vg_surface_t *);
void (*destroy_target) (cairo_vg_context_t *, cairo_vg_surface_t *);
};
struct _cairo_vg_surface {
cairo_surface_t base;
cairo_vg_context_t *context;
VGImage image;
VGImageFormat format;
int width;
int height;
cairo_bool_t own_image;
cairo_cache_entry_t snapshot_cache_entry;
cairo_surface_clipper_t clipper;
unsigned long target_id;
};
static const cairo_surface_backend_t cairo_vg_surface_backend;
slim_hidden_proto (cairo_vg_surface_create);
static cairo_surface_t *
_vg_surface_create_internal (cairo_vg_context_t *context,
VGImage image,
VGImageFormat format,
int width, int height);
static cairo_vg_context_t *
_vg_context_reference (cairo_vg_context_t *context)
{
assert (CAIRO_REFERENCE_COUNT_HAS_REFERENCE (&context->ref_count));
_cairo_reference_count_inc (&context->ref_count);
return context;
}
static cairo_vg_context_t *
_vg_context_lock (cairo_vg_context_t *context)
{
/* XXX if we need to add locking, then it has to be recursive */
return context;
}
static cairo_int_status_t
_vg_context_set_target (cairo_vg_context_t *context,
cairo_vg_surface_t *surface)
{
cairo_status_t status;
if (surface->target_id == 0) {
status = context->create_target (context, surface);
if (unlikely (status))
return status;
}
if (context->target_id == surface->target_id)
return CAIRO_STATUS_SUCCESS;
context->target_id = surface->target_id;
return context->set_target (context, surface);
}
static void
_vg_context_destroy_target (cairo_vg_context_t *context,
cairo_vg_surface_t *surface)
{
if (surface->target_id == 0)
return;
if (context->target_id == surface->target_id)
context->set_target (context, NULL);
context->destroy_target (context, surface);
}
static cairo_bool_t
_vg_snapshot_cache_can_remove (const void *entry)
{
return TRUE;
}
static void
_vg_snapshot_cache_remove (void *cache_entry)
{
cairo_vg_surface_t *surface = cairo_container_of (cache_entry,
cairo_vg_surface_t,
snapshot_cache_entry);
surface->snapshot_cache_entry.hash = 0;
cairo_surface_destroy (&surface->base);
}
static cairo_status_t
_vg_context_init (cairo_vg_context_t *context)
{
cairo_status_t status;
context->status = CAIRO_STATUS_SUCCESS;
CAIRO_REFERENCE_COUNT_INIT (&context->ref_count, 1);
status = _cairo_cache_init (&context->snapshot_cache,
NULL,
_vg_snapshot_cache_can_remove,
_vg_snapshot_cache_remove,
16*1024*1024);
if (unlikely (status))
return status;
context->target_id = 0;
context->source = NULL;
context->alpha = 1.0;
context->paint = vgCreatePaint ();
vgLoadIdentity ();
return CAIRO_STATUS_SUCCESS;
}
static void
_vg_context_destroy (cairo_vg_context_t *context)
{
assert (CAIRO_REFERENCE_COUNT_HAS_REFERENCE (&context->ref_count));
if (! _cairo_reference_count_dec_and_test (&context->ref_count))
return;
if (context->paint != VG_INVALID_HANDLE)
vgDestroyPaint (context->paint);
_cairo_cache_fini (&context->snapshot_cache);
free (context);
}
static void
_vg_context_unlock (cairo_vg_context_t *context)
{
}
#ifdef OPENVG_DEBUG
static void check_vg_errors(const char*function,int line)
{
int err = vgGetError();
if (err != VG_NO_ERROR){
printf("%s+%d:vgError detected: 0x%08x.\n",function, line,err);
assert(err == VG_NO_ERROR);
}
}
#define CHECK_VG_ERRORS() check_vg_errors(__FILE__,__LINE__)
#else
#define CHECK_VG_ERRORS() do{}while(0)
#endif //OPENVG_DEBUG
static pixman_format_code_t
_vg_format_to_pixman (VGImageFormat format,
cairo_bool_t *needs_premult_fixup)
{
*needs_premult_fixup = FALSE;
switch (format) {
/* RGB{A,X} channel ordering */
case VG_sRGBX_8888: return PIXMAN_r8g8b8x8;
case VG_sRGBA_8888: *needs_premult_fixup = TRUE; return PIXMAN_r8g8b8a8;
case VG_sRGBA_8888_PRE: return PIXMAN_r8g8b8a8;
case VG_sRGB_565: return PIXMAN_r5g6b5;
case VG_sRGBA_5551: return 0;
case VG_sRGBA_4444: return 0;
case VG_sL_8: return PIXMAN_g8;
case VG_lRGBX_8888: return 0;
case VG_lRGBA_8888: return 0;
case VG_lRGBA_8888_PRE: return 0;
case VG_lL_8: return 0;
case VG_A_8: return PIXMAN_a8;
case VG_BW_1: return PIXMAN_a1;
case VG_A_1: return PIXMAN_a1;
case VG_A_4: return PIXMAN_a4;
/* {A,X}RGB channel ordering */
case VG_sXRGB_8888: return PIXMAN_x8r8g8b8;
case VG_sARGB_8888: *needs_premult_fixup = TRUE; return PIXMAN_a8r8g8b8;
case VG_sARGB_8888_PRE: return PIXMAN_a8r8g8b8;
case VG_sARGB_1555: return 0;
case VG_sARGB_4444: return 0;
case VG_lXRGB_8888: return 0;
case VG_lARGB_8888: return 0;
case VG_lARGB_8888_PRE: return 0;
/* BGR{A,X} channel ordering */
case VG_sBGRX_8888: return PIXMAN_b8g8r8x8;
case VG_sBGRA_8888: *needs_premult_fixup = TRUE; return PIXMAN_b8g8r8a8;
case VG_sBGRA_8888_PRE: return PIXMAN_b8g8r8a8;
case VG_sBGR_565: return PIXMAN_b5g6r5;
case VG_sBGRA_5551: return 0;
case VG_sBGRA_4444: return 0;
case VG_lBGRX_8888: return 0;
case VG_lBGRA_8888: return 0;
case VG_lBGRA_8888_PRE: return 0;
/* {A,X}BGR channel ordering */
case VG_sXBGR_8888: return PIXMAN_x8b8g8r8;
case VG_sABGR_8888: *needs_premult_fixup = TRUE; return PIXMAN_a8b8g8r8;
case VG_sABGR_8888_PRE: return PIXMAN_a8b8g8r8;
case VG_sABGR_1555: return 0;
case VG_sABGR_4444: return 0;
case VG_lXBGR_8888: return 0;
case VG_lABGR_8888: return 0;
case VG_lABGR_8888_PRE: return 0;
default: return 0;
}
}
static pixman_format_code_t
_vg_format_to_content (VGImageFormat format)
{
/* XXX could use more simple bit tests */
switch (format) {
/* RGB{A,X} channel ordering */
case VG_sRGBX_8888: return CAIRO_CONTENT_COLOR;
case VG_sRGBA_8888: return CAIRO_CONTENT_COLOR_ALPHA;
case VG_sRGBA_8888_PRE: return CAIRO_CONTENT_COLOR_ALPHA;
case VG_sRGB_565: return CAIRO_CONTENT_COLOR;
case VG_sRGBA_5551: return CAIRO_CONTENT_COLOR_ALPHA;
case VG_sRGBA_4444: return CAIRO_CONTENT_COLOR_ALPHA;
case VG_sL_8: return CAIRO_CONTENT_ALPHA;
case VG_lRGBX_8888: return CAIRO_CONTENT_COLOR;
case VG_lRGBA_8888: return CAIRO_CONTENT_COLOR_ALPHA;
case VG_lRGBA_8888_PRE: return CAIRO_CONTENT_COLOR_ALPHA;
case VG_lL_8: return CAIRO_CONTENT_ALPHA;
case VG_A_8: return CAIRO_CONTENT_ALPHA;
case VG_A_4: return CAIRO_CONTENT_ALPHA;
case VG_A_1: return CAIRO_CONTENT_ALPHA;
case VG_BW_1: return CAIRO_CONTENT_ALPHA;
/* {A,X}RGB channel ordering */
case VG_sXRGB_8888: return CAIRO_CONTENT_COLOR;
case VG_sARGB_8888: return CAIRO_CONTENT_COLOR_ALPHA;
case VG_sARGB_8888_PRE: return CAIRO_CONTENT_COLOR_ALPHA;
case VG_sARGB_1555: return CAIRO_CONTENT_COLOR_ALPHA;
case VG_sARGB_4444: return CAIRO_CONTENT_COLOR_ALPHA;
case VG_lXRGB_8888: return CAIRO_CONTENT_COLOR;
case VG_lARGB_8888: return CAIRO_CONTENT_COLOR_ALPHA;
case VG_lARGB_8888_PRE: return CAIRO_CONTENT_COLOR_ALPHA;
/* BGR{A,X} channel ordering */
case VG_sBGRX_8888: return CAIRO_CONTENT_COLOR;
case VG_sBGRA_8888: return CAIRO_CONTENT_COLOR_ALPHA;
case VG_sBGRA_8888_PRE: return CAIRO_CONTENT_COLOR_ALPHA;
case VG_sBGR_565: return CAIRO_CONTENT_COLOR;
case VG_sBGRA_5551: return CAIRO_CONTENT_COLOR_ALPHA;
case VG_sBGRA_4444: return CAIRO_CONTENT_COLOR_ALPHA;
case VG_lBGRX_8888: return CAIRO_CONTENT_COLOR;
case VG_lBGRA_8888: return CAIRO_CONTENT_COLOR_ALPHA;
case VG_lBGRA_8888_PRE: return CAIRO_CONTENT_COLOR_ALPHA;
/* {A,X}BGR channel ordering */
case VG_sXBGR_8888: return CAIRO_CONTENT_COLOR;
case VG_sABGR_8888: return CAIRO_CONTENT_COLOR_ALPHA;
case VG_sABGR_8888_PRE: return CAIRO_CONTENT_COLOR_ALPHA;
case VG_sABGR_1555: return CAIRO_CONTENT_COLOR_ALPHA;
case VG_sABGR_4444: return CAIRO_CONTENT_COLOR_ALPHA;
case VG_lXBGR_8888: return CAIRO_CONTENT_COLOR;
case VG_lABGR_8888: return CAIRO_CONTENT_COLOR_ALPHA;
case VG_lABGR_8888_PRE: return CAIRO_CONTENT_COLOR_ALPHA;
default: return 0;
}
}
static VGImageFormat
_vg_format_from_pixman (pixman_format_code_t format)
{
/* XXX _PRE needs fixup */
switch ((int) format) {
case PIXMAN_r5g6b5: return VG_sRGB_565;
case PIXMAN_g8: return VG_sL_8;
case PIXMAN_a8: return VG_A_8;
case PIXMAN_a1: return VG_BW_1;
case PIXMAN_x8r8g8b8: return VG_sXRGB_8888;
case PIXMAN_a8r8g8b8: return VG_sARGB_8888; // _PRE
case PIXMAN_b8g8r8x8: return VG_sBGRX_8888;
case PIXMAN_b8g8r8a8: return VG_sBGRA_8888; // _PRE
case PIXMAN_b5g6r5: return VG_sBGR_565;
case PIXMAN_x8b8g8r8: return VG_sXBGR_8888;
case PIXMAN_a8b8g8r8: return VG_sABGR_8888; // _PRE
default: return 0;
}
}
static VGImageFormat
_vg_format_for_content (cairo_content_t content)
{
switch (content) {
case CAIRO_CONTENT_ALPHA: return VG_A_8;
case CAIRO_CONTENT_COLOR: return VG_sXRGB_8888;
default: ASSERT_NOT_REACHED;
case CAIRO_CONTENT_COLOR_ALPHA: return VG_sARGB_8888; // _PRE
}
}
static cairo_surface_t *
_vg_surface_create_similar (void *abstract_surface,
cairo_content_t content,
int width,
int height)
{
cairo_vg_surface_t *surface = abstract_surface;
if (width > vgGeti (VG_MAX_IMAGE_WIDTH) ||
height > vgGeti (VG_MAX_IMAGE_HEIGHT))
{
return NULL;
}
return cairo_vg_surface_create (surface->context, content, width, height);
}
static cairo_status_t
_vg_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_vg_surface_t *surface = cairo_container_of (clipper,
cairo_vg_surface_t,
clipper);
cairo_vg_surface_t *mask;
cairo_status_t status;
if (path == NULL) {
vgMask (VG_INVALID_HANDLE,
VG_FILL_MASK, 0, 0, surface->width, surface->height);
vgSeti (VG_MASKING, VG_FALSE);
CHECK_VG_ERRORS();
return CAIRO_STATUS_SUCCESS;
}
mask = (cairo_vg_surface_t *)
_vg_surface_create_similar (surface, CAIRO_CONTENT_ALPHA,
surface->width, surface->height);
if (unlikely (mask == NULL))
return CAIRO_INT_STATUS_UNSUPPORTED;
if (unlikely (mask->base.status))
return mask->base.status;
status = _cairo_surface_fill (&mask->base,
CAIRO_OPERATOR_SOURCE,
&_cairo_pattern_white.base,
path, fill_rule, tolerance, antialias,
NULL);
if (status) {
cairo_surface_destroy (&mask->base);
return status;
}
vgSeti (VG_MASKING, VG_TRUE);
vgMask (mask->image, VG_INTERSECT_MASK, 0, 0, mask->width, mask->height);
cairo_surface_destroy (&mask->base);
CHECK_VG_ERRORS();
return CAIRO_STATUS_SUCCESS;
}
static cairo_bool_t
_vg_surface_get_extents (void *abstract_surface,
cairo_rectangle_int_t *extents)
{
cairo_vg_surface_t *surface = abstract_surface;
extents->x = 0;
extents->y = 0;
extents->width = surface->width;
extents->height = surface->height;
return TRUE;
}
#define MAX_SEG 16 /* max number of knots to upload in a batch */
typedef struct _vg_path {
VGPath path;
const cairo_matrix_t *ctm_inverse;
VGubyte gseg[MAX_SEG];
VGfloat gdata[MAX_SEG*3*2];
int dcount;
int scount;
} vg_path_t;
static cairo_status_t
_vg_move_to (void *closure,
const cairo_point_t *point)
{
vg_path_t *path = closure;
double x = _cairo_fixed_to_double (point->x);
double y = _cairo_fixed_to_double (point->y);
if (path->ctm_inverse)
cairo_matrix_transform_point (path->ctm_inverse, &x, &y);
path->gseg[path->scount++] = VG_MOVE_TO;
path->gdata[path->dcount++] = x;
path->gdata[path->dcount++] = y;
if (path->scount >= MAX_SEG-1) {
vgAppendPathData (path->path, path->scount, path->gseg, path->gdata);
path->scount = 0;
path->dcount = 0;
}
CHECK_VG_ERRORS();
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_vg_line_to (void *closure,
const cairo_point_t *point)
{
vg_path_t *path = closure;
double x = _cairo_fixed_to_double (point->x);
double y = _cairo_fixed_to_double (point->y);
if (path->ctm_inverse)
cairo_matrix_transform_point (path->ctm_inverse, &x, &y);
path->gseg[path->scount++] = VG_LINE_TO;
path->gdata[path->dcount++] = x;
path->gdata[path->dcount++] = y;
if (path->scount >= MAX_SEG-1) {
vgAppendPathData (path->path, path->scount, path->gseg, path->gdata);
path->scount = 0;
path->dcount = 0;
}
CHECK_VG_ERRORS();
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_vg_curve_to (void *closure,
const cairo_point_t *p0,
const cairo_point_t *p1,
const cairo_point_t *p2)
{
vg_path_t *path = closure;
double x0 = _cairo_fixed_to_double (p0->x);
double y0 = _cairo_fixed_to_double (p0->y);
double x1 = _cairo_fixed_to_double (p1->x);
double y1 = _cairo_fixed_to_double (p1->y);
double x2 = _cairo_fixed_to_double (p2->x);
double y2 = _cairo_fixed_to_double (p2->y);
if (path->ctm_inverse) {
cairo_matrix_transform_point (path->ctm_inverse, &x0, &y0);
cairo_matrix_transform_point (path->ctm_inverse, &x1, &y1);
cairo_matrix_transform_point (path->ctm_inverse, &x2, &y2);
}
path->gseg[path->scount++] = VG_CUBIC_TO;
path->gdata[path->dcount++] = x0;
path->gdata[path->dcount++] = y0;
path->gdata[path->dcount++] = x1;
path->gdata[path->dcount++] = y1;
path->gdata[path->dcount++] = x2;
path->gdata[path->dcount++] = y2;
if (path->scount >= MAX_SEG-1) {
vgAppendPathData(path->path, path->scount, path->gseg, path->gdata);
path->scount = 0;
path->dcount = 0;
}
CHECK_VG_ERRORS();
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_vg_close_path (void *closure)
{
vg_path_t *path = closure;
path->gseg[path->scount++] = VG_CLOSE_PATH;
if (path->scount >= MAX_SEG-1) {
vgAppendPathData (path->path, path->scount, path->gseg, path->gdata);
path->scount = 0;
path->dcount = 0;
}
CHECK_VG_ERRORS();
return CAIRO_STATUS_SUCCESS;
}
static void
_vg_path_from_cairo (vg_path_t *vg_path,
const cairo_path_fixed_t *path)
{
cairo_status_t status;
vg_path->scount = 0;
vg_path->dcount = 0;
status = _cairo_path_fixed_interpret (path,
_vg_move_to,
_vg_line_to,
_vg_curve_to,
_vg_close_path,
vg_path);
assert (status == CAIRO_STATUS_SUCCESS);
vgAppendPathData (vg_path->path,
vg_path->scount, vg_path->gseg, vg_path->gdata);
CHECK_VG_ERRORS();
}
static cairo_bool_t
_vg_is_supported_operator (cairo_operator_t op)
{
switch ((int) op) {
case CAIRO_OPERATOR_SOURCE:
case CAIRO_OPERATOR_OVER:
case CAIRO_OPERATOR_IN:
case CAIRO_OPERATOR_DEST_OVER:
case CAIRO_OPERATOR_DEST_IN:
case CAIRO_OPERATOR_ADD:
return TRUE;
default:
return FALSE;
}
}
static VGBlendMode
_vg_operator (cairo_operator_t op)
{
switch ((int) op) {
case CAIRO_OPERATOR_SOURCE:
return VG_BLEND_SRC;
case CAIRO_OPERATOR_OVER:
return VG_BLEND_SRC_OVER;
case CAIRO_OPERATOR_IN:
return VG_BLEND_SRC_IN;
case CAIRO_OPERATOR_DEST_OVER:
return VG_BLEND_DST_OVER;
case CAIRO_OPERATOR_DEST_IN:
return VG_BLEND_DST_IN;
case CAIRO_OPERATOR_ADD:
return VG_BLEND_ADDITIVE;
default:
ASSERT_NOT_REACHED;
return VG_BLEND_SRC_OVER;
}
}
static VGFillRule
_vg_fill_rule_from_cairo (cairo_fill_rule_t rule)
{
switch (rule) {
case CAIRO_FILL_RULE_EVEN_ODD: return VG_EVEN_ODD;
case CAIRO_FILL_RULE_WINDING: return VG_NON_ZERO;
}
ASSERT_NOT_REACHED;
return VG_NON_ZERO;
}
static VGRenderingQuality
_vg_rendering_quality_from_cairo (cairo_antialias_t aa)
{
switch (aa) {
case CAIRO_ANTIALIAS_DEFAULT:
case CAIRO_ANTIALIAS_SUBPIXEL:
case CAIRO_ANTIALIAS_GOOD:
case CAIRO_ANTIALIAS_BEST:
return VG_RENDERING_QUALITY_BETTER;
case CAIRO_ANTIALIAS_GRAY:
case CAIRO_ANTIALIAS_FAST:
return VG_RENDERING_QUALITY_FASTER;
case CAIRO_ANTIALIAS_NONE:
return VG_RENDERING_QUALITY_NONANTIALIASED;
}
ASSERT_NOT_REACHED;
return VG_RENDERING_QUALITY_BETTER;
}
static VGCapStyle
_vg_line_cap_from_cairo (cairo_line_cap_t cap)
{
switch (cap) {
case CAIRO_LINE_CAP_BUTT: return VG_CAP_BUTT;
case CAIRO_LINE_CAP_ROUND: return VG_CAP_ROUND;
case CAIRO_LINE_CAP_SQUARE: return VG_CAP_SQUARE;
}
ASSERT_NOT_REACHED;
return VG_CAP_BUTT;
}
static VGJoinStyle
_vg_line_join_from_cairo (cairo_line_join_t join)
{
switch (join) {
case CAIRO_LINE_JOIN_MITER: return VG_JOIN_MITER;
case CAIRO_LINE_JOIN_ROUND: return VG_JOIN_ROUND;
case CAIRO_LINE_JOIN_BEVEL: return VG_JOIN_BEVEL;
}
ASSERT_NOT_REACHED;
return VG_JOIN_MITER;
}
static void
_vg_matrix_from_cairo (VGfloat *dst, const cairo_matrix_t *src)
{
dst[0] = /* sx */ src->xx;
dst[1] = /* shy */ src->yx;
dst[2] = /* w0 */ 0;
dst[3] = /* shx */ src->xy;
dst[4] = /* sy */ src->yy;
dst[5] = /* w1 */ 0;
dst[6] = /* tx */ src->x0;
dst[7] = /* ty */ src->y0;
dst[8] = /* w2 */ 0;
}
static cairo_status_t
_vg_setup_gradient_stops (cairo_vg_context_t *context,
const cairo_gradient_pattern_t *pattern)
{
VGint numstops = pattern->n_stops;
VGfloat *stops, stack_stops[CAIRO_STACK_ARRAY_LENGTH (VGfloat)];
int i;
if (numstops*5 < ARRAY_LENGTH (stack_stops)) {
stops = stack_stops;
} else {
stops = _cairo_malloc_ab (numstops, 5*sizeof (VGfloat));
if (unlikely (stops == NULL))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
for (i = 0; i < numstops; i++) {
stops[i*5 + 0] = pattern->stops[i].offset;
stops[i*5 + 1] = pattern->stops[i].color.red;
stops[i*5 + 2] = pattern->stops[i].color.green;
stops[i*5 + 3] = pattern->stops[i].color.blue;
stops[i*5 + 4] = pattern->stops[i].color.alpha * context->alpha;
}
vgSetParameterfv (context->paint,
VG_PAINT_COLOR_RAMP_STOPS, numstops * 5, stops);
if (stops != stack_stops)
free (stops);
CHECK_VG_ERRORS();
return CAIRO_STATUS_SUCCESS;
}
static void
_vg_set_source_matrix (const cairo_pattern_t *pat)
{
cairo_matrix_t mat;
cairo_status_t status;
VGfloat vmat[9];
mat = pat->matrix;
status = cairo_matrix_invert (&mat);
assert (status == CAIRO_STATUS_SUCCESS);
_vg_matrix_from_cairo (vmat, &mat);
vgSeti (VG_MATRIX_MODE, VG_MATRIX_FILL_PAINT_TO_USER);
vgLoadMatrix (vmat);
vgSeti (VG_MATRIX_MODE, VG_MATRIX_STROKE_PAINT_TO_USER);
vgLoadMatrix (vmat);
vgSeti (VG_MATRIX_MODE, VG_MATRIX_PATH_USER_TO_SURFACE);
CHECK_VG_ERRORS();
}
static cairo_status_t
_vg_setup_linear_source (cairo_vg_context_t *context,
const cairo_linear_pattern_t *lpat)
{
VGfloat linear[4];
linear[0] = lpat->pd1.x;
linear[1] = lpat->pd1.y;
linear[2] = lpat->pd2.x;
linear[3] = lpat->pd2.y;
vgSetParameteri (context->paint,
VG_PAINT_COLOR_RAMP_SPREAD_MODE,
VG_COLOR_RAMP_SPREAD_PAD);
vgSetParameteri (context->paint,
VG_PAINT_TYPE,
VG_PAINT_TYPE_LINEAR_GRADIENT);
vgSetParameterfv (context->paint,
VG_PAINT_LINEAR_GRADIENT, 4, linear);
_vg_set_source_matrix (&lpat->base.base);
CHECK_VG_ERRORS();
return _vg_setup_gradient_stops (context, &lpat->base);
}
static cairo_status_t
_vg_setup_radial_source (cairo_vg_context_t *context,
const cairo_radial_pattern_t *rpat)
{
VGfloat radial[5];
radial[0] = rpat->cd1.center.x;
radial[1] = rpat->cd1.center.y;
radial[2] = rpat->cd2.center.x;
radial[3] = rpat->cd2.center.y;
radial[4] = rpat->cd2.radius;
vgSetParameteri (context->paint,
VG_PAINT_COLOR_RAMP_SPREAD_MODE, VG_COLOR_RAMP_SPREAD_PAD);
vgSetParameteri (context->paint,
VG_PAINT_TYPE, VG_PAINT_TYPE_RADIAL_GRADIENT);
vgSetParameterfv (context->paint,
VG_PAINT_RADIAL_GRADIENT, 5, radial);
_vg_set_source_matrix (&rpat->base.base);
/* FIXME: copy/adapt fixes from SVG backend to add inner radius */
CHECK_VG_ERRORS();
return _vg_setup_gradient_stops (context, &rpat->base);
}
static cairo_status_t
_vg_setup_solid_source (cairo_vg_context_t *context,
const cairo_solid_pattern_t *spat)
{
VGfloat color[] = {
spat->color.red,
spat->color.green,
spat->color.blue,
spat->color.alpha * context->alpha
};
vgSetParameteri (context->paint, VG_PAINT_TYPE, VG_PAINT_TYPE_COLOR);
vgSetParameterfv (context->paint, VG_PAINT_COLOR, 4, color);
CHECK_VG_ERRORS();
return CAIRO_STATUS_SUCCESS;
}
static cairo_vg_surface_t *
_vg_clone_recording_surface (cairo_vg_context_t *context,
cairo_surface_t *surface)
{
VGImage vg_image;
VGImageFormat format;
cairo_status_t status;
cairo_rectangle_int_t extents;
cairo_vg_surface_t *clone;
status = _cairo_surface_get_extents (surface, &extents);
if (status)
return NULL;
if (extents.width > vgGeti (VG_MAX_IMAGE_WIDTH) ||
extents.height > vgGeti (VG_MAX_IMAGE_HEIGHT))
{
return NULL;
}
format = _vg_format_for_content (surface->content);
/* NONALIASED, FASTER, BETTER */
vg_image = vgCreateImage (format,
extents.width, extents.height,
VG_IMAGE_QUALITY_FASTER);
clone = (cairo_vg_surface_t *)
_vg_surface_create_internal (context, vg_image, format,
extents.width, extents.height);
cairo_surface_set_device_offset (&clone->base, -extents.x, -extents.y);
status = _cairo_recording_surface_replay (surface, &clone->base);
if (unlikely (status)) {
cairo_surface_destroy (&clone->base);
return (cairo_vg_surface_t *) _cairo_surface_create_in_error (status);
}
return clone;
}
static cairo_vg_surface_t *
_vg_clone_image_surface (cairo_vg_context_t *context,
cairo_surface_t *surface)
{
cairo_image_surface_t *image;
void *image_extra;
cairo_status_t status;
VGImage vg_image;
VGImageFormat format;
cairo_rectangle_int_t extents;
cairo_vg_surface_t *clone;
if (surface->backend->acquire_source_image == NULL)
return NULL;
status = _cairo_surface_get_extents (surface, &extents);
if (status)
return NULL;
if (extents.width > vgGeti (VG_MAX_IMAGE_WIDTH) ||
extents.height > vgGeti (VG_MAX_IMAGE_HEIGHT))
{
return NULL;
}
status = _cairo_surface_acquire_source_image (surface,
&image, &image_extra);
if (unlikely (status))
return (cairo_vg_surface_t *) _cairo_surface_create_in_error (status);
format = _vg_format_from_pixman (image->pixman_format);
if (format == 0)
format = _vg_format_for_content (image->base.content);
/* NONALIASED, FASTER, BETTER */
vg_image = vgCreateImage (format,
image->width, image->height,
VG_IMAGE_QUALITY_FASTER);
clone = (cairo_vg_surface_t *)
_vg_surface_create_internal (context, vg_image, format,
image->width, image->height);
if (unlikely (clone->base.status))
return clone;
vgImageSubData (clone->image,
image->data, image->stride,
format, 0, 0, image->width, image->height);
_cairo_surface_release_source_image (surface, image, image_extra);
return clone;
}
static void
_vg_surface_remove_from_cache (cairo_surface_t *abstract_surface)
{
cairo_vg_surface_t *surface = (cairo_vg_surface_t *) abstract_surface;
if (surface->snapshot_cache_entry.hash) {
cairo_vg_context_t *context;
context = _vg_context_lock (surface->context);
_cairo_cache_remove (&context->snapshot_cache,
&surface->snapshot_cache_entry);
_vg_context_unlock (context);
surface->snapshot_cache_entry.hash = 0;
}
}
static cairo_status_t
_vg_setup_surface_source (cairo_vg_context_t *context,
const cairo_surface_pattern_t *spat)
{
cairo_surface_t *snapshot;
cairo_vg_surface_t *clone;
cairo_status_t status;
snapshot = _cairo_surface_has_snapshot (spat->surface,
&cairo_vg_surface_backend);
if (snapshot != NULL) {
clone = (cairo_vg_surface_t *) cairo_surface_reference (snapshot);
goto DONE;
}
if (_cairo_surface_is_recording (spat->surface))
clone = _vg_clone_recording_surface (context, spat->surface);
else
clone = _vg_clone_image_surface (context, spat->surface);
if (clone == NULL)
return CAIRO_INT_STATUS_UNSUPPORTED;
if (unlikely (clone->base.status))
return clone->base.status;
clone->snapshot_cache_entry.hash = clone->base.unique_id;
status = _cairo_cache_insert (&context->snapshot_cache,
&clone->snapshot_cache_entry);
if (unlikely (status)) {
clone->snapshot_cache_entry.hash = 0;
cairo_surface_destroy (&clone->base);
return status;
}
_cairo_surface_attach_snapshot (spat->surface, &clone->base,
_vg_surface_remove_from_cache);
DONE:
cairo_surface_destroy (&context->source->base);
context->source = clone;
vgSetParameteri (context->paint, VG_PAINT_TYPE, VG_PAINT_TYPE_PATTERN);
switch (spat->base.extend) {
case CAIRO_EXTEND_PAD:
vgSetParameteri (context->paint,