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/* cairo - a vector graphics library with display and print output
*
* Copyright © 2009 Eric Anholt
* Copyright © 2009 Chris Wilson
* Copyright © 2005,2010 Red Hat, Inc
* Copyright © 2011 Intel Corporation
*
* This library is free software; you can redistribute it and/or
* modify it either under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation
* (the "LGPL") or, at your option, under the terms of the Mozilla
* Public License Version 1.1 (the "MPL"). If you do not alter this
* notice, a recipient may use your version of this file under either
* the MPL or the LGPL.
*
* You should have received a copy of the LGPL along with this library
* in the file COPYING-LGPL-2.1; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
* You should have received a copy of the MPL along with this library
* in the file COPYING-MPL-1.1
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
* OF ANY KIND, either express or implied. See the LGPL or the MPL for
* the specific language governing rights and limitations.
*
* The Original Code is the cairo graphics library.
*
* The Initial Developer of the Original Code is Red Hat, Inc.
*
* Contributor(s):
* Benjamin Otte <otte@gnome.org>
* Carl Worth <cworth@cworth.org>
* Chris Wilson <chris@chris-wilson.co.uk>
* Eric Anholt <eric@anholt.net>
*/
#include "cairoint.h"
#include "cairo-gl-private.h"
#include "cairo-composite-rectangles-private.h"
#include "cairo-compositor-private.h"
#include "cairo-default-context-private.h"
#include "cairo-error-private.h"
#include "cairo-image-surface-private.h"
#include "cairo-spans-compositor-private.h"
#include "cairo-surface-backend-private.h"
#include "cairo-surface-offset-private.h"
static cairo_int_status_t
acquire (void *abstract_dst)
{
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
release (void *abstract_dst)
{
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
set_clip_region (void *_surface,
cairo_region_t *region)
{
cairo_gl_surface_t *surface = _surface;
surface->clip_region = region;
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
draw_image_boxes (void *_dst,
cairo_image_surface_t *image,
cairo_boxes_t *boxes,
int dx, int dy)
{
cairo_gl_surface_t *dst = _dst;
struct _cairo_boxes_chunk *chunk;
int i;
for (chunk = &boxes->chunks; chunk; chunk = chunk->next) {
for (i = 0; i < chunk->count; i++) {
cairo_box_t *b = &chunk->base[i];
int x = _cairo_fixed_integer_part (b->p1.x);
int y = _cairo_fixed_integer_part (b->p1.y);
int w = _cairo_fixed_integer_part (b->p2.x) - x;
int h = _cairo_fixed_integer_part (b->p2.y) - y;
cairo_status_t status;
status = _cairo_gl_surface_draw_image (dst, image,
x + dx, y + dy,
w, h,
x, y,
TRUE);
if (unlikely (status))
return status;
}
}
return CAIRO_STATUS_SUCCESS;
}
static void
emit_aligned_boxes (cairo_gl_context_t *ctx,
const cairo_boxes_t *boxes)
{
const struct _cairo_boxes_chunk *chunk;
cairo_gl_emit_rect_t emit = _cairo_gl_context_choose_emit_rect (ctx);
int i;
for (chunk = &boxes->chunks; chunk; chunk = chunk->next) {
for (i = 0; i < chunk->count; i++) {
int x1 = _cairo_fixed_integer_part (chunk->base[i].p1.x);
int y1 = _cairo_fixed_integer_part (chunk->base[i].p1.y);
int x2 = _cairo_fixed_integer_part (chunk->base[i].p2.x);
int y2 = _cairo_fixed_integer_part (chunk->base[i].p2.y);
emit (ctx, x1, y1, x2, y2);
}
}
}
static cairo_int_status_t
fill_boxes (void *_dst,
cairo_operator_t op,
const cairo_color_t *color,
cairo_boxes_t *boxes)
{
cairo_gl_composite_t setup;
cairo_gl_context_t *ctx;
cairo_int_status_t status;
status = _cairo_gl_composite_init (&setup, op, _dst, FALSE);
if (unlikely (status))
goto FAIL;
_cairo_gl_composite_set_solid_source (&setup, color);
status = _cairo_gl_composite_begin (&setup, &ctx);
if (unlikely (status))
goto FAIL;
emit_aligned_boxes (ctx, boxes);
status = _cairo_gl_context_release (ctx, CAIRO_STATUS_SUCCESS);
FAIL:
_cairo_gl_composite_fini (&setup);
return status;
}
static cairo_int_status_t
composite_boxes (void *_dst,
cairo_operator_t op,
cairo_surface_t *abstract_src,
cairo_surface_t *abstract_mask,
int src_x,
int src_y,
int mask_x,
int mask_y,
int dst_x,
int dst_y,
cairo_boxes_t *boxes,
const cairo_rectangle_int_t *extents)
{
cairo_gl_composite_t setup;
cairo_gl_context_t *ctx;
cairo_int_status_t status;
status = _cairo_gl_composite_init (&setup, op, _dst, FALSE);
if (unlikely (status))
goto FAIL;
_cairo_gl_composite_set_source_operand (&setup,
source_to_operand (abstract_src));
_cairo_gl_operand_translate (&setup.src, dst_x-src_x, dst_y-src_y);
_cairo_gl_composite_set_mask_operand (&setup,
source_to_operand (abstract_mask));
_cairo_gl_operand_translate (&setup.mask, dst_x-mask_x, dst_y-mask_y);
status = _cairo_gl_composite_begin (&setup, &ctx);
if (unlikely (status))
goto FAIL;
emit_aligned_boxes (ctx, boxes);
status = _cairo_gl_context_release (ctx, CAIRO_STATUS_SUCCESS);
FAIL:
_cairo_gl_composite_fini (&setup);
return status;
}
static cairo_int_status_t
composite (void *_dst,
cairo_operator_t op,
cairo_surface_t *abstract_src,
cairo_surface_t *abstract_mask,
int src_x,
int src_y,
int mask_x,
int mask_y,
int dst_x,
int dst_y,
unsigned int width,
unsigned int height)
{
cairo_gl_composite_t setup;
cairo_gl_context_t *ctx;
cairo_int_status_t status;
status = _cairo_gl_composite_init (&setup, op, _dst, FALSE);
if (unlikely (status))
goto FAIL;
_cairo_gl_composite_set_source_operand (&setup,
source_to_operand (abstract_src));
_cairo_gl_operand_translate (&setup.src, dst_x-src_x, dst_y-src_y);
_cairo_gl_composite_set_mask_operand (&setup,
source_to_operand (abstract_mask));
_cairo_gl_operand_translate (&setup.mask, dst_x-mask_x, dst_y-mask_y);
status = _cairo_gl_composite_begin (&setup, &ctx);
if (unlikely (status))
goto FAIL;
/* XXX clip */
_cairo_gl_context_emit_rect (ctx, dst_x, dst_y, dst_x+width, dst_y+height);
status = _cairo_gl_context_release (ctx, CAIRO_STATUS_SUCCESS);
FAIL:
_cairo_gl_composite_fini (&setup);
return status;
}
static cairo_int_status_t
lerp (void *dst,
cairo_surface_t *src,
cairo_surface_t *mask,
int src_x,
int src_y,
int mask_x,
int mask_y,
int dst_x,
int dst_y,
unsigned int width,
unsigned int height)
{
cairo_int_status_t status;
/* we could avoid some repetition... */
status = composite (dst, CAIRO_OPERATOR_DEST_OUT, mask, NULL,
mask_x, mask_y,
0, 0,
dst_x, dst_y,
width, height);
if (unlikely (status))
return status;
status = composite (dst, CAIRO_OPERATOR_ADD, src, mask,
src_x, src_y,
mask_x, mask_y,
dst_x, dst_y,
width, height);
if (unlikely (status))
return status;
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
traps_to_operand (void *_dst,
const cairo_rectangle_int_t *extents,
cairo_antialias_t antialias,
cairo_traps_t *traps,
cairo_gl_operand_t *operand,
int dst_x, int dst_y)
{
pixman_format_code_t pixman_format;
pixman_image_t *pixman_image;
cairo_surface_t *image, *mask;
cairo_surface_pattern_t pattern;
cairo_status_t status;
pixman_format = antialias != CAIRO_ANTIALIAS_NONE ? PIXMAN_a8 : PIXMAN_a1;
pixman_image = pixman_image_create_bits (pixman_format,
extents->width,
extents->height,
NULL, 0);
if (unlikely (pixman_image == NULL))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
_pixman_image_add_traps (pixman_image, extents->x, extents->y, traps);
image = _cairo_image_surface_create_for_pixman_image (pixman_image,
pixman_format);
if (unlikely (image->status)) {
pixman_image_unref (pixman_image);
return image->status;
}
mask = _cairo_surface_create_scratch (_dst,
CAIRO_CONTENT_COLOR_ALPHA,
extents->width,
extents->height,
NULL);
if (unlikely (mask->status)) {
cairo_surface_destroy (image);
return mask->status;
}
status = _cairo_gl_surface_draw_image ((cairo_gl_surface_t *)mask,
(cairo_image_surface_t *)image,
0, 0,
extents->width, extents->height,
0, 0,
TRUE);
cairo_surface_destroy (image);
if (unlikely (status))
goto error;
_cairo_pattern_init_for_surface (&pattern, mask);
cairo_matrix_init_translate (&pattern.base.matrix,
-extents->x+dst_x, -extents->y+dst_y);
pattern.base.filter = CAIRO_FILTER_NEAREST;
pattern.base.extend = CAIRO_EXTEND_NONE;
status = _cairo_gl_operand_init (operand, &pattern.base, _dst,
&_cairo_unbounded_rectangle,
&_cairo_unbounded_rectangle,
FALSE);
_cairo_pattern_fini (&pattern.base);
if (unlikely (status))
goto error;
operand->texture.owns_surface = (cairo_gl_surface_t *)mask;
return CAIRO_STATUS_SUCCESS;
error:
cairo_surface_destroy (mask);
return status;
}
static cairo_int_status_t
composite_traps (void *_dst,
cairo_operator_t op,
cairo_surface_t *abstract_src,
int src_x,
int src_y,
int dst_x,
int dst_y,
const cairo_rectangle_int_t *extents,
cairo_antialias_t antialias,
cairo_traps_t *traps)
{
cairo_gl_composite_t setup;
cairo_gl_context_t *ctx;
cairo_int_status_t status;
status = _cairo_gl_composite_init (&setup, op, _dst, FALSE);
if (unlikely (status))
goto FAIL;
_cairo_gl_composite_set_source_operand (&setup,
source_to_operand (abstract_src));
_cairo_gl_operand_translate (&setup.src, -src_x-dst_x, -src_y-dst_y);
status = traps_to_operand (_dst, extents, antialias, traps, &setup.mask, dst_x, dst_y);
if (unlikely (status))
goto FAIL;
status = _cairo_gl_composite_begin (&setup, &ctx);
if (unlikely (status))
goto FAIL;
/* XXX clip */
_cairo_gl_context_emit_rect (ctx,
extents->x-dst_x, extents->y-dst_y,
extents->x-dst_x+extents->width,
extents->y-dst_y+extents->height);
status = _cairo_gl_context_release (ctx, CAIRO_STATUS_SUCCESS);
FAIL:
_cairo_gl_composite_fini (&setup);
return status;
}
static cairo_gl_surface_t *
tristrip_to_surface (void *_dst,
const cairo_rectangle_int_t *extents,
cairo_antialias_t antialias,
cairo_tristrip_t *strip)
{
pixman_format_code_t pixman_format;
pixman_image_t *pixman_image;
cairo_surface_t *image, *mask;
cairo_status_t status;
pixman_format = antialias != CAIRO_ANTIALIAS_NONE ? PIXMAN_a8 : PIXMAN_a1,
pixman_image = pixman_image_create_bits (pixman_format,
extents->width,
extents->height,
NULL, 0);
if (unlikely (pixman_image == NULL))
return (cairo_gl_surface_t *)_cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
_pixman_image_add_tristrip (pixman_image, extents->x, extents->y, strip);
image = _cairo_image_surface_create_for_pixman_image (pixman_image,
pixman_format);
if (unlikely (image->status)) {
pixman_image_unref (pixman_image);
return (cairo_gl_surface_t *)image;
}
mask = _cairo_surface_create_scratch (_dst,
CAIRO_CONTENT_COLOR_ALPHA,
extents->width,
extents->height,
NULL);
if (unlikely (mask->status)) {
cairo_surface_destroy (image);
return (cairo_gl_surface_t *)mask;
}
status = _cairo_gl_surface_draw_image ((cairo_gl_surface_t *)mask,
(cairo_image_surface_t *)image,
0, 0,
extents->width, extents->height,
0, 0,
TRUE);
cairo_surface_destroy (image);
if (unlikely (status)) {
cairo_surface_destroy (mask);
return (cairo_gl_surface_t*)_cairo_surface_create_in_error (status);
}
return (cairo_gl_surface_t*)mask;
}
static cairo_int_status_t
composite_tristrip (void *_dst,
cairo_operator_t op,
cairo_surface_t *abstract_src,
int src_x,
int src_y,
int dst_x,
int dst_y,
const cairo_rectangle_int_t *extents,
cairo_antialias_t antialias,
cairo_tristrip_t *strip)
{
cairo_gl_composite_t setup;
cairo_gl_context_t *ctx;
cairo_gl_surface_t *mask;
cairo_int_status_t status;
mask = tristrip_to_surface (_dst, extents, antialias, strip);
if (unlikely (mask->base.status))
return mask->base.status;
status = _cairo_gl_composite_init (&setup, op, _dst, FALSE);
if (unlikely (status))
goto FAIL;
_cairo_gl_composite_set_source_operand (&setup,
source_to_operand (abstract_src));
//_cairo_gl_composite_set_mask_surface (&setup, mask, 0, 0);
status = _cairo_gl_composite_begin (&setup, &ctx);
if (unlikely (status))
goto FAIL;
/* XXX clip */
_cairo_gl_context_emit_rect (ctx,
dst_x, dst_y,
dst_x+extents->width,
dst_y+extents->height);
status = _cairo_gl_context_release (ctx, CAIRO_STATUS_SUCCESS);
FAIL:
_cairo_gl_composite_fini (&setup);
cairo_surface_destroy (&mask->base);
return status;
}
static cairo_int_status_t
check_composite (const cairo_composite_rectangles_t *extents)
{
if (! _cairo_gl_operator_is_supported (extents->op))
return UNSUPPORTED ("unsupported operator");
return CAIRO_STATUS_SUCCESS;
}
const cairo_compositor_t *
_cairo_gl_traps_compositor_get (void)
{
static cairo_atomic_once_t once = CAIRO_ATOMIC_ONCE_INIT;
static cairo_traps_compositor_t compositor;
if (_cairo_atomic_init_once_enter(&once)) {
_cairo_traps_compositor_init (&compositor, &_cairo_fallback_compositor);
compositor.acquire = acquire;
compositor.release = release;
compositor.set_clip_region = set_clip_region;
compositor.pattern_to_surface = _cairo_gl_pattern_to_source;
compositor.draw_image_boxes = draw_image_boxes;
//compositor.copy_boxes = copy_boxes;
compositor.fill_boxes = fill_boxes;
compositor.check_composite = check_composite;
compositor.composite = composite;
compositor.lerp = lerp;
//compositor.check_composite_boxes = check_composite_boxes;
compositor.composite_boxes = composite_boxes;
//compositor.check_composite_traps = check_composite_traps;
compositor.composite_traps = composite_traps;
//compositor.check_composite_tristrip = check_composite_traps;
compositor.composite_tristrip = composite_tristrip;
compositor.check_composite_glyphs = _cairo_gl_check_composite_glyphs;
compositor.composite_glyphs = _cairo_gl_composite_glyphs;
_cairo_atomic_init_once_leave(&once);
}
return &compositor.base;
}