0,0 → 1,1853 |
/* -*- 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 <tardyp@gmail.com> |
* Øyvind Kolås <pippin@gimp.org> |
* Vladimi Vukicevic <vladimir@mozilla.com> (stubbed out base backend) |
* Chris Wilson <chris@chris-wilson.co.uk> |
*/ |
|
#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, |
VG_PAINT_PATTERN_TILING_MODE, |
VG_TILE_PAD); |
break; |
|
case CAIRO_EXTEND_NONE: |
vgSetParameteri (context->paint, |
VG_PAINT_PATTERN_TILING_MODE, |
VG_TILE_FILL); |
{ |
VGfloat color[] = {0,0,0,0}; |
vgSetfv (VG_TILE_FILL_COLOR, 4, color); |
} |
break; |
|
case CAIRO_EXTEND_REPEAT: |
vgSetParameteri (context->paint, |
VG_PAINT_PATTERN_TILING_MODE, |
VG_TILE_REPEAT); |
break; |
|
default: |
ASSERT_NOT_REACHED; |
case CAIRO_EXTEND_REFLECT: |
vgSetParameteri (context->paint, |
VG_PAINT_PATTERN_TILING_MODE, |
VG_TILE_REFLECT); |
break; |
} |
vgPaintPattern (context->paint, context->source->image); |
|
_vg_set_source_matrix (&spat->base); |
|
CHECK_VG_ERRORS(); |
return CAIRO_STATUS_SUCCESS; |
} |
|
static cairo_status_t |
setup_source (cairo_vg_context_t *context, |
const cairo_pattern_t *source) |
{ |
switch (source->type) { |
case CAIRO_PATTERN_TYPE_SOLID: |
return _vg_setup_solid_source (context, |
(cairo_solid_pattern_t *) source); |
case CAIRO_PATTERN_TYPE_LINEAR: |
return _vg_setup_linear_source (context, |
(cairo_linear_pattern_t *) source); |
case CAIRO_PATTERN_TYPE_RADIAL: |
return _vg_setup_radial_source (context, |
(cairo_radial_pattern_t *) source); |
case CAIRO_PATTERN_TYPE_SURFACE: |
return _vg_setup_surface_source (context, |
(cairo_surface_pattern_t *) source); |
default: |
ASSERT_NOT_REACHED; |
return CAIRO_INT_STATUS_UNSUPPORTED; |
} |
} |
|
static cairo_int_status_t |
_vg_surface_stroke (void *abstract_surface, |
cairo_operator_t op, |
const cairo_pattern_t *source, |
const cairo_path_fixed_t *path, |
const cairo_stroke_style_t *style, |
const cairo_matrix_t *ctm, |
const cairo_matrix_t *ctm_inverse, |
double tolerance, |
cairo_antialias_t antialias, |
const cairo_clip_t *clip) |
{ |
cairo_vg_surface_t *surface = abstract_surface; |
cairo_vg_context_t *context; |
cairo_status_t status; |
VGfloat state[9]; |
VGfloat strokeTransform[9]; |
vg_path_t vg_path; |
|
if (! _vg_is_supported_operator (op)) |
return CAIRO_INT_STATUS_UNSUPPORTED; |
|
context = _vg_context_lock (surface->context); |
status = _vg_context_set_target (context, surface); |
if (status) { |
_vg_context_unlock (context); |
return status; |
} |
|
status = setup_source (context, source); |
if (status) { |
_vg_context_unlock (context); |
return status; |
} |
|
status = _cairo_surface_clipper_set_clip (&surface->clipper, clip); |
if (unlikely (status)) { |
_vg_context_unlock (context); |
return status; |
} |
|
vg_path.path = vgCreatePath (VG_PATH_FORMAT_STANDARD, |
VG_PATH_DATATYPE_F, |
1, 0, 0, 0, |
VG_PATH_CAPABILITY_ALL); |
|
vgGetMatrix (state); |
_vg_matrix_from_cairo (strokeTransform, ctm); |
vgMultMatrix (strokeTransform); |
|
vg_path.ctm_inverse = ctm_inverse; |
|
_vg_path_from_cairo (&vg_path, path); |
|
/* XXX DASH_PATTERN, DASH_PHASE */ |
vgSetf (VG_STROKE_LINE_WIDTH, style->line_width); |
vgSetf (VG_STROKE_MITER_LIMIT, style->miter_limit); |
vgSetf (VG_STROKE_JOIN_STYLE, _vg_line_join_from_cairo (style->line_join)); |
vgSetf (VG_STROKE_CAP_STYLE, _vg_line_cap_from_cairo (style->line_cap)); |
|
vgSeti (VG_BLEND_MODE, _vg_operator (op)); |
|
vgSetPaint (context->paint, VG_STROKE_PATH); |
|
vgDrawPath (vg_path.path, VG_STROKE_PATH); |
|
vgDestroyPath (vg_path.path); |
|
vgLoadMatrix (state); |
|
CHECK_VG_ERRORS(); |
_vg_context_unlock (context); |
|
return CAIRO_STATUS_SUCCESS; |
} |
|
static cairo_int_status_t |
_vg_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_vg_surface_t *surface = abstract_surface; |
cairo_vg_context_t *context; |
cairo_status_t status; |
vg_path_t vg_path; |
|
if (op == CAIRO_OPERATOR_DEST) |
return CAIRO_STATUS_SUCCESS; |
|
if (! _vg_is_supported_operator (op)) |
return CAIRO_INT_STATUS_UNSUPPORTED; |
|
context = _vg_context_lock (surface->context); |
status = _vg_context_set_target (context, surface); |
if (status) { |
_vg_context_unlock (context); |
return status; |
} |
|
status = setup_source (context, source); |
if (status) { |
_vg_context_unlock (context); |
return status; |
} |
|
status = _cairo_surface_clipper_set_clip (&surface->clipper, clip); |
if (unlikely (status)) { |
_vg_context_unlock (context); |
return status; |
} |
|
vg_path.path = vgCreatePath (VG_PATH_FORMAT_STANDARD, |
VG_PATH_DATATYPE_F, |
1, 0, |
0, 0, |
VG_PATH_CAPABILITY_ALL); |
vg_path.ctm_inverse = NULL; |
|
_vg_path_from_cairo (&vg_path, path); |
|
/* XXX tolerance */ |
|
vgSeti (VG_BLEND_MODE, _vg_operator (op)); |
vgSetf (VG_FILL_RULE, _vg_fill_rule_from_cairo (fill_rule)); |
vgSetf (VG_RENDERING_QUALITY, _vg_rendering_quality_from_cairo (antialias)); |
|
vgSetPaint (context->paint, VG_FILL_PATH); |
|
vgDrawPath (vg_path.path, VG_FILL_PATH); |
|
vgDestroyPath (vg_path.path); |
|
_vg_context_unlock (context); |
|
CHECK_VG_ERRORS(); |
return CAIRO_STATUS_SUCCESS; |
} |
|
static cairo_int_status_t |
_vg_surface_paint (void *abstract_surface, |
cairo_operator_t op, |
const cairo_pattern_t *source, |
const cairo_clip_t *clip) |
{ |
cairo_vg_surface_t *surface = abstract_surface; |
cairo_vg_context_t *context; |
cairo_status_t status; |
|
if (op == CAIRO_OPERATOR_DEST) |
return CAIRO_STATUS_SUCCESS; |
|
if (! _vg_is_supported_operator (op)) |
return CAIRO_INT_STATUS_UNSUPPORTED; |
|
context = _vg_context_lock (surface->context); |
status = _vg_context_set_target (context, surface); |
if (status) { |
_vg_context_unlock (context); |
return status; |
} |
|
status = setup_source (context, source); |
if (status) { |
_vg_context_unlock (context); |
return status; |
} |
|
status = _cairo_surface_clipper_set_clip (&surface->clipper, clip); |
if (unlikely (status)) { |
_vg_context_unlock (context); |
return status; |
} |
|
vgSeti (VG_BLEND_MODE, _vg_operator (op)); |
vgSetPaint (context->paint, VG_FILL_PATH); |
|
{ /* creating a rectangular path that should cover the extent */ |
VGubyte segs[] = { |
VG_MOVE_TO_ABS, VG_LINE_TO_ABS, |
VG_LINE_TO_ABS, VG_LINE_TO_ABS, |
VG_CLOSE_PATH |
}; |
VGfloat data[] = { |
0, 0, |
surface->width, 0, |
surface->width, surface->height, |
0, surface->height |
}; |
VGPath fullext; |
|
fullext = vgCreatePath (VG_PATH_FORMAT_STANDARD, VG_PATH_DATATYPE_F, |
1,0,0,0, VG_PATH_CAPABILITY_ALL); |
vgAppendPathData (fullext, sizeof(segs), segs, data); |
|
vgDrawPath (fullext, VG_FILL_PATH); |
|
vgDestroyPath (fullext); |
} |
|
_vg_context_unlock (context); |
|
CHECK_VG_ERRORS(); |
return CAIRO_STATUS_SUCCESS; |
} |
|
static cairo_int_status_t |
_vg_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_vg_surface_t *surface = abstract_surface; |
cairo_status_t status; |
|
if (! _vg_is_supported_operator (op)) |
return CAIRO_INT_STATUS_UNSUPPORTED; |
|
/* Handle paint-with-alpha to do fades cheaply */ |
if (mask->type == CAIRO_PATTERN_TYPE_SOLID) { |
cairo_solid_pattern_t *solid = (cairo_solid_pattern_t *) mask; |
cairo_vg_context_t *context = _vg_context_lock (surface->context); |
double alpha = context->alpha; |
|
context->alpha = solid->color.alpha; |
status = _vg_surface_paint (abstract_surface, op, source, clip); |
context->alpha = alpha; |
|
_vg_context_unlock (context); |
|
return status; |
} |
|
return CAIRO_INT_STATUS_UNSUPPORTED; |
} |
|
static void |
_vg_surface_get_font_options (void *abstract_surface, |
cairo_font_options_t *options) |
{ |
_cairo_font_options_init_default (options); |
|
cairo_font_options_set_hint_metrics (options, CAIRO_HINT_METRICS_ON); |
_cairo_font_options_set_round_glyph_positions (options, CAIRO_ROUND_GLYPH_POS_OFF); |
} |
|
static cairo_int_status_t |
_vg_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_status_t status = CAIRO_STATUS_SUCCESS; |
cairo_path_fixed_t path; |
|
if (num_glyphs <= 0) |
return CAIRO_STATUS_SUCCESS; |
|
_cairo_path_fixed_init (&path); |
|
/* XXX Glyph cache! OpenVG font support in 1.1? */ |
|
status = _cairo_scaled_font_glyph_path (scaled_font, |
glyphs, num_glyphs, |
&path); |
if (unlikely (status)) |
goto BAIL; |
|
status = _vg_surface_fill (abstract_surface, |
op, source, &path, |
CAIRO_FILL_RULE_WINDING, |
CAIRO_GSTATE_TOLERANCE_DEFAULT, |
CAIRO_ANTIALIAS_DEFAULT, |
clip); |
BAIL: |
_cairo_path_fixed_fini (&path); |
return status; |
} |
|
static inline int |
multiply_alpha (int alpha, int color) |
{ |
int temp = alpha * color + 0x80; |
return (temp + (temp >> 8)) >> 8; |
} |
|
static void |
premultiply_argb (uint8_t *data, |
int width, |
int height, |
int stride) |
{ |
int i; |
|
while (height --) { |
uint32_t *row = (uint32_t *) data; |
|
for (i = 0; i < width; i++) { |
uint32_t p = row[i]; |
uint8_t alpha; |
|
alpha = p >> 24; |
if (alpha == 0) { |
row[i] = 0; |
} else if (alpha != 0xff) { |
uint8_t r = multiply_alpha (alpha, (p >> 16) & 0xff); |
uint8_t g = multiply_alpha (alpha, (p >> 8) & 0xff); |
uint8_t b = multiply_alpha (alpha, (p >> 0) & 0xff); |
row[i] = (alpha << 24) | (r << 16) | (g << 8) | (b << 0); |
} |
} |
|
data += stride; |
} |
} |
|
static cairo_int_status_t |
_vg_get_image (cairo_vg_surface_t *surface, |
int x, int y, |
int width, int height, |
cairo_image_surface_t **image_out) |
{ |
cairo_image_surface_t *image; |
pixman_image_t *pixman_image; |
pixman_format_code_t pixman_format; |
cairo_bool_t needs_premultiply; |
|
pixman_format = _vg_format_to_pixman (surface->format, |
&needs_premultiply); |
if (pixman_format == 0) |
return CAIRO_INT_STATUS_UNSUPPORTED; |
|
pixman_image = pixman_image_create_bits (pixman_format, |
width, height, |
NULL, 0); |
if (unlikely (pixman_image == NULL)) |
return _cairo_error (CAIRO_STATUS_NO_MEMORY); |
|
vgFinish (); |
CHECK_VG_ERRORS(); |
|
vgGetImageSubData (surface->image, |
pixman_image_get_data (pixman_image), |
pixman_image_get_stride (pixman_image), |
surface->format, |
x, y, width, height); |
|
image = (cairo_image_surface_t *) |
_cairo_image_surface_create_for_pixman_image (pixman_image, |
pixman_format); |
if (unlikely (image->base.status)) { |
pixman_image_unref (pixman_image); |
return image->base.status; |
} |
|
if (needs_premultiply) |
premultiply_argb (image->data, width, height, image->stride); |
|
*image_out = image; |
return CAIRO_STATUS_SUCCESS; |
} |
|
static cairo_status_t |
_vg_surface_acquire_source_image (void *abstract_surface, |
cairo_image_surface_t **image_out, |
void **image_extra) |
{ |
cairo_vg_surface_t *surface = abstract_surface; |
|
CHECK_VG_ERRORS(); |
*image_extra = NULL; |
return _vg_get_image (surface, |
0, 0, surface->width, surface->height, |
image_out); |
} |
|
static void |
_vg_surface_release_source_image (void *abstract_surface, |
cairo_image_surface_t *image, |
void *image_extra) |
{ |
cairo_surface_destroy (&image->base); |
} |
|
static cairo_status_t |
_vg_surface_finish (void *abstract_surface) |
{ |
cairo_vg_surface_t *surface = abstract_surface; |
cairo_vg_context_t *context = _vg_context_lock (surface->context); |
|
if (surface->snapshot_cache_entry.hash) { |
_cairo_cache_remove (&context->snapshot_cache, |
&surface->snapshot_cache_entry); |
|
surface->snapshot_cache_entry.hash = 0; |
} |
|
_cairo_surface_clipper_reset (&surface->clipper); |
|
if (surface->own_image) |
vgDestroyImage (surface->image); |
|
_vg_context_destroy_target (context, surface); |
|
_vg_context_unlock (context); |
_vg_context_destroy (context); |
|
CHECK_VG_ERRORS(); |
return CAIRO_STATUS_SUCCESS; |
} |
|
static const cairo_surface_backend_t cairo_vg_surface_backend = { |
CAIRO_SURFACE_TYPE_VG, |
_vg_surface_finish, |
|
_cairo_default_context_create, /* XXX */ |
|
_vg_surface_create_similar, |
NULL, /* create similar image */ |
NULL, /* map to image */ |
NULL, /* unmap image */ |
|
_cairo_surface_default_source, |
_vg_surface_acquire_source_image, |
_vg_surface_release_source_image, |
NULL, /* snapshot */ |
|
NULL, /* copy_page */ |
NULL, /* show_page */ |
|
_vg_surface_get_extents, |
_vg_surface_get_font_options, /* get_font_options */ |
|
NULL, /* flush */ |
NULL, /* mark dirty */ |
|
_vg_surface_paint, |
_vg_surface_mask, |
_vg_surface_stroke, |
_vg_surface_fill, |
NULL, /* fill-stroke */ |
_vg_surface_show_glyphs, |
}; |
|
static cairo_surface_t * |
_vg_surface_create_internal (cairo_vg_context_t *context, |
VGImage image, |
VGImageFormat format, |
int width, int height) |
{ |
cairo_vg_surface_t *surface; |
|
surface = malloc (sizeof (cairo_vg_surface_t)); |
if (unlikely (surface == NULL)) |
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY)); |
|
surface->context = _vg_context_reference (context); |
|
surface->image = image; |
surface->format = format; |
|
_cairo_surface_init (&surface->base, |
&cairo_vg_surface_backend, |
NULL, /* device */ |
_vg_format_to_content (format)); |
|
surface->width = width; |
surface->height = height; |
|
_cairo_surface_clipper_init (&surface->clipper, |
_vg_surface_clipper_intersect_clip_path); |
|
surface->snapshot_cache_entry.hash = 0; |
|
surface->target_id = 0; |
|
CHECK_VG_ERRORS(); |
return &surface->base; |
} |
|
cairo_surface_t * |
cairo_vg_surface_create_for_image (cairo_vg_context_t *context, |
VGImage image, |
VGImageFormat format, |
int width, int height) |
{ |
cairo_bool_t premult; |
|
if (context->status) |
return _cairo_surface_create_in_error (context->status); |
|
if (image == VG_INVALID_HANDLE) |
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY)); |
if (_vg_format_to_pixman (format, &premult) == 0) |
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_FORMAT)); |
|
return _vg_surface_create_internal (context, image, format, width, height); |
} |
|
cairo_surface_t * |
cairo_vg_surface_create (cairo_vg_context_t *context, |
cairo_content_t content, |
int width, |
int height) |
{ |
VGImage image; |
VGImageFormat format; |
cairo_surface_t *surface; |
|
if (context->status) |
return _cairo_surface_create_in_error (context->status); |
|
if (! CAIRO_CONTENT_VALID (content)) |
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_CONTENT)); |
|
if (width > vgGeti (VG_MAX_IMAGE_WIDTH) || |
height > vgGeti (VG_MAX_IMAGE_HEIGHT)) |
{ |
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_SIZE)); |
} |
|
|
format = _vg_format_for_content (content); |
image = vgCreateImage (format, width, height, VG_IMAGE_QUALITY_BETTER); |
if (image == VG_INVALID_HANDLE) |
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY)); |
|
surface = _vg_surface_create_internal (context, |
image, format, width, height); |
if (unlikely (surface->status)) |
return surface; |
|
((cairo_vg_surface_t *) surface)->own_image = TRUE; |
return surface; |
} |
slim_hidden_def (cairo_vg_surface_create); |
|
VGImage |
cairo_vg_surface_get_image (cairo_surface_t *abstract_surface) |
{ |
cairo_vg_surface_t *surface; |
|
if (abstract_surface->backend != &cairo_vg_surface_backend) { |
_cairo_error_throw (CAIRO_STATUS_SURFACE_TYPE_MISMATCH); |
return VG_INVALID_HANDLE; |
} |
|
surface = (cairo_vg_surface_t *) abstract_surface; |
return surface->image; |
} |
|
int |
cairo_vg_surface_get_width (cairo_surface_t *abstract_surface) |
{ |
cairo_vg_surface_t *surface; |
|
if (abstract_surface->backend != &cairo_vg_surface_backend) { |
_cairo_error_throw (CAIRO_STATUS_SURFACE_TYPE_MISMATCH); |
return 0; |
} |
|
surface = (cairo_vg_surface_t *) abstract_surface; |
return surface->width; |
} |
|
int |
cairo_vg_surface_get_height (cairo_surface_t *abstract_surface) |
{ |
cairo_vg_surface_t *surface; |
|
if (abstract_surface->backend != &cairo_vg_surface_backend) { |
_cairo_error_throw (CAIRO_STATUS_SURFACE_TYPE_MISMATCH); |
return 0; |
} |
|
surface = (cairo_vg_surface_t *) abstract_surface; |
return surface->height; |
} |
|
VGImageFormat |
cairo_vg_surface_get_format (cairo_surface_t *abstract_surface) |
{ |
cairo_vg_surface_t *surface; |
|
if (abstract_surface->backend != &cairo_vg_surface_backend) { |
_cairo_error_throw (CAIRO_STATUS_SURFACE_TYPE_MISMATCH); |
return 0; |
} |
|
surface = (cairo_vg_surface_t *) abstract_surface; |
return surface->format; |
} |
|
/* GL specific context support :-( |
* |
* OpenVG like cairo defers creation of surface (and the necessary |
* paraphernalia to the application. |
*/ |
|
static const cairo_vg_context_t _vg_context_nil = { |
CAIRO_STATUS_NO_MEMORY, |
CAIRO_REFERENCE_COUNT_INVALID |
}; |
|
static const cairo_vg_context_t _vg_context_nil_invalid_visual = { |
CAIRO_STATUS_INVALID_VISUAL, |
CAIRO_REFERENCE_COUNT_INVALID |
}; |
|
#if CAIRO_HAS_GLX_FUNCTIONS |
#include <GL/glx.h> |
|
static cairo_status_t |
glx_create_target (cairo_vg_context_t *context, |
cairo_vg_surface_t *surface) |
{ |
/* XXX hmm, magic required for creating an FBO points to VGImage! */ |
return CAIRO_INT_STATUS_UNSUPPORTED; |
} |
|
static cairo_status_t |
glx_set_target (cairo_vg_context_t *context, |
cairo_vg_surface_t *surface) |
{ |
#if 0 |
glXMakeContextCurrent (context->display, |
(GLXDrawable) surface->target_id, |
(GLXDrawable) surface->target_id, |
context->context); |
#else |
return CAIRO_INT_STATUS_UNSUPPORTED; |
#endif |
} |
|
static void |
glx_destroy_target (cairo_vg_context_t *context, |
cairo_vg_surface_t *surface) |
{ |
} |
|
cairo_vg_context_t * |
cairo_vg_context_create_for_glx (Display *dpy, GLXContext ctx) |
{ |
cairo_vg_context_t *context; |
cairo_status_t status; |
|
context = malloc (sizeof (*context)); |
if (unlikely (context == NULL)) |
return (cairo_vg_context_t *) &_vg_context_nil; |
|
context->display = dpy; |
context->context = ctx; |
|
context->create_target = glx_create_target; |
context->set_target = glx_set_target; |
context->destroy_target = glx_destroy_target; |
|
status = _vg_context_init (context); |
if (unlikely (status)) { |
free (context); |
return (cairo_vg_context_t *) &_vg_context_nil; |
} |
|
return context; |
} |
#endif |
|
#if CAIRO_HAS_EGL_FUNCTIONS |
static cairo_status_t |
egl_create_target (cairo_vg_context_t *context, |
cairo_vg_surface_t *surface) |
{ |
EGLSurface *egl_surface; |
#define RED 1 |
#define GREEN 3 |
#define BLUE 5 |
#define ALPHA 7 |
int attribs[] = { |
EGL_RED_SIZE, 0, |
EGL_GREEN_SIZE, 0, |
EGL_BLUE_SIZE, 0, |
EGL_ALPHA_SIZE, 0, |
EGL_SURFACE_TYPE, EGL_PBUFFER_BIT, |
EGL_RENDERABLE_TYPE, EGL_OPENVG_BIT, |
EGL_NONE |
}; |
pixman_format_code_t pixman_format; |
EGLConfig config; |
int num_configs = 0; |
cairo_bool_t needs_premultiply; |
|
pixman_format = _vg_format_to_pixman (surface->format, &needs_premultiply); |
if (pixman_format == 0) |
return CAIRO_INT_STATUS_UNSUPPORTED; |
|
/* XXX no control over pixel ordering! */ |
attribs[RED] = PIXMAN_FORMAT_R (pixman_format); |
attribs[GREEN] = PIXMAN_FORMAT_G (pixman_format); |
attribs[BLUE] = PIXMAN_FORMAT_B (pixman_format); |
attribs[ALPHA] = PIXMAN_FORMAT_A (pixman_format); |
|
if (! eglChooseConfig (context->display, |
attribs, |
&config, 1, &num_configs) || |
num_configs != 1) |
{ |
fprintf(stderr, "Error: eglChooseConfig() failed.\n"); |
return CAIRO_INT_STATUS_UNSUPPORTED; |
} |
|
egl_surface = |
eglCreatePbufferFromClientBuffer (context->display, |
EGL_OPENVG_IMAGE, |
(EGLClientBuffer) surface->image, |
config, |
NULL); |
surface->target_id = (unsigned long) egl_surface; |
|
return CAIRO_STATUS_SUCCESS; |
} |
|
static cairo_status_t |
egl_set_target (cairo_vg_context_t *context, |
cairo_vg_surface_t *surface) |
{ |
if (! eglMakeCurrent (context->display, |
(EGLSurface *) surface->target_id, |
(EGLSurface *) surface->target_id, |
context->context)) |
{ |
return _cairo_error (CAIRO_STATUS_NO_MEMORY); |
} |
|
return CAIRO_STATUS_SUCCESS; |
} |
|
static void |
egl_destroy_target (cairo_vg_context_t *context, |
cairo_vg_surface_t *surface) |
{ |
eglDestroySurface (context->display, |
(EGLSurface *) surface->target_id); |
} |
|
cairo_vg_context_t * |
cairo_vg_context_create_for_egl (EGLDisplay egl_display, |
EGLContext egl_context) |
{ |
cairo_vg_context_t *context; |
cairo_status_t status; |
|
context = malloc (sizeof (*context)); |
if (unlikely (context == NULL)) |
return (cairo_vg_context_t *) &_vg_context_nil; |
|
status = _vg_context_init (context); |
if (unlikely (status)) { |
free (context); |
return (cairo_vg_context_t *) &_vg_context_nil; |
} |
|
context->display = egl_display; |
context->context = egl_context; |
|
context->create_target = egl_create_target; |
context->set_target = egl_set_target; |
context->destroy_target = egl_destroy_target; |
|
return context; |
} |
#endif |
|
cairo_status_t |
cairo_vg_context_status (cairo_vg_context_t *context) |
{ |
return context->status; |
} |
|
void |
cairo_vg_context_destroy (cairo_vg_context_t *context) |
{ |
if (context == NULL || CAIRO_REFERENCE_COUNT_IS_INVALID (&context->ref_count)) |
return; |
|
_vg_context_destroy (context); |
} |