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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
*
* 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-composite-rectangles-private.h"
#include "cairo-default-context-private.h"
#include "cairo-error-private.h"
#include "cairo-gl-private.h"
#include "cairo-image-surface-inline.h"
cairo_status_t
_cairo_gl_surface_acquire_dest_image (void *abstract_surface,
cairo_rectangle_int_t *interest_rect,
cairo_image_surface_t **image_out,
cairo_rectangle_int_t *image_rect_out,
void **image_extra)
{
cairo_gl_surface_t *surface = abstract_surface;
cairo_int_status_t status;
status = _cairo_gl_surface_deferred_clear (surface);
if (unlikely (status))
return status;
*image_extra = NULL;
return _cairo_gl_surface_get_image (surface, interest_rect, image_out,
image_rect_out);
}
void
_cairo_gl_surface_release_dest_image (void *abstract_surface,
cairo_rectangle_int_t *interest_rect,
cairo_image_surface_t *image,
cairo_rectangle_int_t *image_rect,
void *image_extra)
{
cairo_status_t status;
status = _cairo_gl_surface_draw_image (abstract_surface, image,
0, 0,
image->width, image->height,
image_rect->x, image_rect->y,
TRUE);
/* as we created the image, its format should be directly applicable */
assert (status == CAIRO_STATUS_SUCCESS);
cairo_surface_destroy (&image->base);
}
cairo_status_t
_cairo_gl_surface_clone_similar (void *abstract_surface,
cairo_surface_t *src,
int src_x,
int src_y,
int width,
int height,
int *clone_offset_x,
int *clone_offset_y,
cairo_surface_t **clone_out)
{
cairo_gl_surface_t *surface = abstract_surface;
cairo_int_status_t status;
/* XXX: Use GLCopyTexImage2D to clone non-texture-surfaces */
if (src->device == surface->base.device &&
_cairo_gl_surface_is_texture ((cairo_gl_surface_t *) src)) {
status = _cairo_gl_surface_deferred_clear ((cairo_gl_surface_t *)src);
if (unlikely (status))
return status;
*clone_offset_x = 0;
*clone_offset_y = 0;
*clone_out = cairo_surface_reference (src);
return CAIRO_STATUS_SUCCESS;
} else if (_cairo_surface_is_image (src)) {
cairo_image_surface_t *image_src = (cairo_image_surface_t *)src;
cairo_gl_surface_t *clone;
clone = (cairo_gl_surface_t *)
_cairo_gl_surface_create_similar (&surface->base,
src->content,
width, height);
if (clone == NULL)
return UNSUPPORTED ("create_similar failed");
if (clone->base.status)
return clone->base.status;
status = _cairo_gl_surface_draw_image (clone, image_src,
src_x, src_y,
width, height,
0, 0, TRUE);
if (status) {
cairo_surface_destroy (&clone->base);
return status;
}
*clone_out = &clone->base;
*clone_offset_x = src_x;
*clone_offset_y = src_y;
return CAIRO_STATUS_SUCCESS;
}
return UNSUPPORTED ("unknown src surface type in clone_similar");
}
/* Creates a cairo-gl pattern surface for the given trapezoids */
static cairo_status_t
_cairo_gl_get_traps_pattern (cairo_gl_surface_t *dst,
int dst_x, int dst_y,
int width, int height,
cairo_trapezoid_t *traps,
int num_traps,
cairo_antialias_t antialias,
cairo_surface_pattern_t *pattern)
{
pixman_format_code_t pixman_format;
pixman_image_t *image;
cairo_surface_t *surface;
int i;
pixman_format = antialias != CAIRO_ANTIALIAS_NONE ? PIXMAN_a8 : PIXMAN_a1,
image = pixman_image_create_bits (pixman_format, width, height, NULL, 0);
if (unlikely (image == NULL))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
for (i = 0; i < num_traps; i++) {
pixman_trapezoid_t trap;
trap.top = _cairo_fixed_to_16_16 (traps[i].top);
trap.bottom = _cairo_fixed_to_16_16 (traps[i].bottom);
trap.left.p1.x = _cairo_fixed_to_16_16 (traps[i].left.p1.x);
trap.left.p1.y = _cairo_fixed_to_16_16 (traps[i].left.p1.y);
trap.left.p2.x = _cairo_fixed_to_16_16 (traps[i].left.p2.x);
trap.left.p2.y = _cairo_fixed_to_16_16 (traps[i].left.p2.y);
trap.right.p1.x = _cairo_fixed_to_16_16 (traps[i].right.p1.x);
trap.right.p1.y = _cairo_fixed_to_16_16 (traps[i].right.p1.y);
trap.right.p2.x = _cairo_fixed_to_16_16 (traps[i].right.p2.x);
trap.right.p2.y = _cairo_fixed_to_16_16 (traps[i].right.p2.y);
pixman_rasterize_trapezoid (image, &trap, -dst_x, -dst_y);
}
surface = _cairo_image_surface_create_for_pixman_image (image,
pixman_format);
if (unlikely (surface->status)) {
pixman_image_unref (image);
return surface->status;
}
_cairo_pattern_init_for_surface (pattern, surface);
cairo_surface_destroy (surface);
return CAIRO_STATUS_SUCCESS;
}
cairo_int_status_t
_cairo_gl_surface_composite (cairo_operator_t op,
const cairo_pattern_t *src,
const cairo_pattern_t *mask,
void *abstract_dst,
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_region_t *clip_region)
{
cairo_gl_surface_t *dst = abstract_dst;
cairo_gl_context_t *ctx;
cairo_status_t status;
cairo_gl_composite_t setup;
cairo_rectangle_int_t rect = { dst_x, dst_y, width, height };
int dx, dy;
status = _cairo_gl_surface_deferred_clear (dst);
if (unlikely (status))
return status;
if (op == CAIRO_OPERATOR_SOURCE &&
mask == NULL &&
src->type == CAIRO_PATTERN_TYPE_SURFACE &&
_cairo_surface_is_image (((cairo_surface_pattern_t *) src)->surface) &&
_cairo_matrix_is_integer_translation (&src->matrix, &dx, &dy)) {
cairo_image_surface_t *image = (cairo_image_surface_t *)
((cairo_surface_pattern_t *) src)->surface;
dx += src_x;
dy += src_y;
if (dx >= 0 &&
dy >= 0 &&
dx + width <= (unsigned int) image->width &&
dy + height <= (unsigned int) image->height) {
status = _cairo_gl_surface_draw_image (dst, image,
dx, dy,
width, height,
dst_x, dst_y, TRUE);
if (status != CAIRO_INT_STATUS_UNSUPPORTED)
return status;
}
}
status = _cairo_gl_composite_init (&setup, op, dst,
mask && mask->has_component_alpha,
&rect);
if (unlikely (status))
goto CLEANUP;
status = _cairo_gl_composite_set_source (&setup, src,
src_x, src_y,
dst_x, dst_y,
width, height);
if (unlikely (status))
goto CLEANUP;
status = _cairo_gl_composite_set_mask (&setup, mask,
mask_x, mask_y,
dst_x, dst_y,
width, height);
if (unlikely (status))
goto CLEANUP;
status = _cairo_gl_composite_begin (&setup, &ctx);
if (unlikely (status))
goto CLEANUP;
if (clip_region != NULL) {
int i, num_rectangles;
num_rectangles = cairo_region_num_rectangles (clip_region);
for (i = 0; i < num_rectangles; i++) {
cairo_rectangle_int_t rect;
cairo_region_get_rectangle (clip_region, i, &rect);
_cairo_gl_composite_emit_rect (ctx,
rect.x, rect.y,
rect.x + rect.width, rect.y + rect.height,
0);
}
} else {
_cairo_gl_composite_emit_rect (ctx,
dst_x, dst_y,
dst_x + width, dst_y + height,
0);
}
status = _cairo_gl_context_release (ctx, status);
CLEANUP:
_cairo_gl_composite_fini (&setup);
return status;
}
cairo_int_status_t
_cairo_gl_surface_composite_trapezoids (cairo_operator_t op,
const cairo_pattern_t *pattern,
void *abstract_dst,
cairo_antialias_t antialias,
int src_x, int src_y,
int dst_x, int dst_y,
unsigned int width,
unsigned int height,
cairo_trapezoid_t *traps,
int num_traps,
cairo_region_t *clip_region)
{
cairo_gl_surface_t *dst = abstract_dst;
cairo_surface_pattern_t traps_pattern;
cairo_int_status_t status;
if (! _cairo_gl_operator_is_supported (op))
return UNSUPPORTED ("unsupported operator");
status = _cairo_gl_surface_deferred_clear (dst);
if (unlikely (status))
return status;
status = _cairo_gl_get_traps_pattern (dst,
dst_x, dst_y, width, height,
traps, num_traps, antialias,
&traps_pattern);
if (unlikely (status))
return status;
status = _cairo_gl_surface_composite (op,
pattern, &traps_pattern.base, dst,
src_x, src_y,
0, 0,
dst_x, dst_y,
width, height,
clip_region);
_cairo_pattern_fini (&traps_pattern.base);
assert (status != CAIRO_INT_STATUS_UNSUPPORTED);
return status;
}
cairo_int_status_t
_cairo_gl_surface_fill_rectangles (void *abstract_dst,
cairo_operator_t op,
const cairo_color_t *color,
cairo_rectangle_int_t *rects,
int num_rects)
{
cairo_gl_surface_t *dst = abstract_dst;
cairo_solid_pattern_t solid;
cairo_gl_context_t *ctx;
cairo_status_t status;
cairo_gl_composite_t setup;
int i;
status = _cairo_gl_surface_deferred_clear (dst);
if (unlikely (status))
return status;
status = _cairo_gl_composite_init (&setup, op, dst,
FALSE,
/* XXX */ NULL);
if (unlikely (status))
goto CLEANUP;
_cairo_pattern_init_solid (&solid, color);
status = _cairo_gl_composite_set_source (&setup, &solid.base,
0, 0,
0, 0,
0, 0);
if (unlikely (status))
goto CLEANUP;
status = _cairo_gl_composite_set_mask (&setup, NULL,
0, 0,
0, 0,
0, 0);
if (unlikely (status))
goto CLEANUP;
status = _cairo_gl_composite_begin (&setup, &ctx);
if (unlikely (status))
goto CLEANUP;
for (i = 0; i < num_rects; i++) {
_cairo_gl_composite_emit_rect (ctx,
rects[i].x,
rects[i].y,
rects[i].x + rects[i].width,
rects[i].y + rects[i].height,
0);
}
status = _cairo_gl_context_release (ctx, status);
CLEANUP:
_cairo_gl_composite_fini (&setup);
return status;
}
typedef struct _cairo_gl_surface_span_renderer {
cairo_span_renderer_t base;
cairo_gl_composite_t setup;
int xmin, xmax;
int ymin, ymax;
cairo_gl_context_t *ctx;
} cairo_gl_surface_span_renderer_t;
static cairo_status_t
_cairo_gl_render_bounded_spans (void *abstract_renderer,
int y, int height,
const cairo_half_open_span_t *spans,
unsigned num_spans)
{
cairo_gl_surface_span_renderer_t *renderer = abstract_renderer;
if (num_spans == 0)
return CAIRO_STATUS_SUCCESS;
do {
if (spans[0].coverage) {
_cairo_gl_composite_emit_rect (renderer->ctx,
spans[0].x, y,
spans[1].x, y + height,
spans[0].coverage);
}
spans++;
} while (--num_spans > 1);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cairo_gl_render_unbounded_spans (void *abstract_renderer,
int y, int height,
const cairo_half_open_span_t *spans,
unsigned num_spans)
{
cairo_gl_surface_span_renderer_t *renderer = abstract_renderer;
if (y > renderer->ymin) {
_cairo_gl_composite_emit_rect (renderer->ctx,
renderer->xmin, renderer->ymin,
renderer->xmax, y,
0);
}
if (num_spans == 0) {
_cairo_gl_composite_emit_rect (renderer->ctx,
renderer->xmin, y,
renderer->xmax, y + height,
0);
} else {
if (spans[0].x != renderer->xmin) {
_cairo_gl_composite_emit_rect (renderer->ctx,
renderer->xmin, y,
spans[0].x, y + height,
0);
}
do {
_cairo_gl_composite_emit_rect (renderer->ctx,
spans[0].x, y,
spans[1].x, y + height,
spans[0].coverage);
spans++;
} while (--num_spans > 1);
if (spans[0].x != renderer->xmax) {
_cairo_gl_composite_emit_rect (renderer->ctx,
spans[0].x, y,
renderer->xmax, y + height,
0);
}
}
renderer->ymin = y + height;
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cairo_gl_finish_unbounded_spans (void *abstract_renderer)
{
cairo_gl_surface_span_renderer_t *renderer = abstract_renderer;
if (renderer->ymax > renderer->ymin) {
_cairo_gl_composite_emit_rect (renderer->ctx,
renderer->xmin, renderer->ymin,
renderer->xmax, renderer->ymax,
0);
}
return _cairo_gl_context_release (renderer->ctx, CAIRO_STATUS_SUCCESS);
}
static cairo_status_t
_cairo_gl_finish_bounded_spans (void *abstract_renderer)
{
cairo_gl_surface_span_renderer_t *renderer = abstract_renderer;
return _cairo_gl_context_release (renderer->ctx, CAIRO_STATUS_SUCCESS);
}
static void
_cairo_gl_surface_span_renderer_destroy (void *abstract_renderer)
{
cairo_gl_surface_span_renderer_t *renderer = abstract_renderer;
if (!renderer)
return;
_cairo_gl_composite_fini (&renderer->setup);
free (renderer);
}
cairo_bool_t
_cairo_gl_surface_check_span_renderer (cairo_operator_t op,
const cairo_pattern_t *pattern,
void *abstract_dst,
cairo_antialias_t antialias)
{
if (! _cairo_gl_operator_is_supported (op))
return FALSE;
return TRUE;
(void) pattern;
(void) abstract_dst;
(void) antialias;
}
cairo_span_renderer_t *
_cairo_gl_surface_create_span_renderer (cairo_operator_t op,
const cairo_pattern_t *src,
void *abstract_dst,
cairo_antialias_t antialias,
const cairo_composite_rectangles_t *rects)
{
cairo_gl_surface_t *dst = abstract_dst;
cairo_gl_surface_span_renderer_t *renderer;
cairo_status_t status;
const cairo_rectangle_int_t *extents;
status = _cairo_gl_surface_deferred_clear (dst);
if (unlikely (status))
return _cairo_span_renderer_create_in_error (status);
renderer = calloc (1, sizeof (*renderer));
if (unlikely (renderer == NULL))
return _cairo_span_renderer_create_in_error (CAIRO_STATUS_NO_MEMORY);
renderer->base.destroy = _cairo_gl_surface_span_renderer_destroy;
if (rects->is_bounded) {
renderer->base.render_rows = _cairo_gl_render_bounded_spans;
renderer->base.finish = _cairo_gl_finish_bounded_spans;
extents = &rects->bounded;
} else {
renderer->base.render_rows = _cairo_gl_render_unbounded_spans;
renderer->base.finish = _cairo_gl_finish_unbounded_spans;
extents = &rects->unbounded;
}
renderer->xmin = extents->x;
renderer->xmax = extents->x + extents->width;
renderer->ymin = extents->y;
renderer->ymax = extents->y + extents->height;
status = _cairo_gl_composite_init (&renderer->setup,
op, dst,
FALSE, extents);
if (unlikely (status))
goto FAIL;
status = _cairo_gl_composite_set_source (&renderer->setup, src,
extents->x, extents->y,
extents->x, extents->y,
extents->width, extents->height);
if (unlikely (status))
goto FAIL;
_cairo_gl_composite_set_spans (&renderer->setup);
_cairo_gl_composite_set_clip_region (&renderer->setup,
_cairo_clip_get_region (rects->clip));
status = _cairo_gl_composite_begin (&renderer->setup, &renderer->ctx);
if (unlikely (status))
goto FAIL;
return &renderer->base;
FAIL:
_cairo_gl_composite_fini (&renderer->setup);
free (renderer);
return _cairo_span_renderer_create_in_error (status);
}