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cairo/src/test-base-compositor-surface.c
Chris Wilson af9fbd176b Introduce a new compositor architecture 
Having spent the last dev cycle looking at how we could specialize the
compositors for various backends, we once again look for the
commonalities in order to reduce the duplication. In part this is
motivated by the idea that spans is a good interface for both the
existent GL backend and pixman, and so they deserve a dedicated
compositor. xcb/xlib target an identical rendering system and so they
should be using the same compositor, and it should be possible to run
that same compositor locally against pixman to generate reference tests.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

P.S. This brings massive upheaval (read breakage) I've tried delaying in
order to fix as many things as possible but now this one patch does far,
far, far too much. Apologies in advance for breaking your favourite
backend, but trust me in that the end result will be much better. :)
2011-09-12 08:29:48 +01:00

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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 © 2002 University of Southern California
* Copyright © 2005 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
* http://www.mozilla.org/MPL/
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
* OF ANY KIND, either express or implied. See the LGPL or the MPL for
* the specific language governing rights and limitations.
*
* The Original Code is the cairo graphics library.
*
* The Initial Developer of the Original Code is University of Southern
* California.
*
* Contributor(s):
* Carl D. Worth <cworth@cworth.org>
* Joonas Pihlaja <jpihlaja@cc.helsinki.fi>
* Chris Wilson <chris@chris-wilson.co.uk>
*/
#include "cairoint.h"
#include "test-compositor-surface-private.h"
#include "cairo-clip-private.h"
#include "cairo-composite-rectangles-private.h"
#include "cairo-compositor-private.h"
#include "cairo-error-private.h"
#include "cairo-image-surface-private.h"
#include "cairo-region-private.h"
#include "cairo-traps-private.h"
/* The intention is that this is a surface that just works, and most
* important of all does not try to be clever!
*/
typedef cairo_int_status_t
(*draw_func_t) (cairo_image_surface_t *dst,
void *closure,
cairo_operator_t op,
const cairo_pattern_t *pattern,
int dst_x,
int dst_y,
const cairo_rectangle_int_t *extents);
static pixman_op_t
_pixman_operator (cairo_operator_t op)
{
switch ((int) op) {
case CAIRO_OPERATOR_CLEAR:
return PIXMAN_OP_CLEAR;
case CAIRO_OPERATOR_SOURCE:
return PIXMAN_OP_SRC;
case CAIRO_OPERATOR_OVER:
return PIXMAN_OP_OVER;
case CAIRO_OPERATOR_IN:
return PIXMAN_OP_IN;
case CAIRO_OPERATOR_OUT:
return PIXMAN_OP_OUT;
case CAIRO_OPERATOR_ATOP:
return PIXMAN_OP_ATOP;
case CAIRO_OPERATOR_DEST:
return PIXMAN_OP_DST;
case CAIRO_OPERATOR_DEST_OVER:
return PIXMAN_OP_OVER_REVERSE;
case CAIRO_OPERATOR_DEST_IN:
return PIXMAN_OP_IN_REVERSE;
case CAIRO_OPERATOR_DEST_OUT:
return PIXMAN_OP_OUT_REVERSE;
case CAIRO_OPERATOR_DEST_ATOP:
return PIXMAN_OP_ATOP_REVERSE;
case CAIRO_OPERATOR_XOR:
return PIXMAN_OP_XOR;
case CAIRO_OPERATOR_ADD:
return PIXMAN_OP_ADD;
case CAIRO_OPERATOR_SATURATE:
return PIXMAN_OP_SATURATE;
case CAIRO_OPERATOR_MULTIPLY:
return PIXMAN_OP_MULTIPLY;
case CAIRO_OPERATOR_SCREEN:
return PIXMAN_OP_SCREEN;
case CAIRO_OPERATOR_OVERLAY:
return PIXMAN_OP_OVERLAY;
case CAIRO_OPERATOR_DARKEN:
return PIXMAN_OP_DARKEN;
case CAIRO_OPERATOR_LIGHTEN:
return PIXMAN_OP_LIGHTEN;
case CAIRO_OPERATOR_COLOR_DODGE:
return PIXMAN_OP_COLOR_DODGE;
case CAIRO_OPERATOR_COLOR_BURN:
return PIXMAN_OP_COLOR_BURN;
case CAIRO_OPERATOR_HARD_LIGHT:
return PIXMAN_OP_HARD_LIGHT;
case CAIRO_OPERATOR_SOFT_LIGHT:
return PIXMAN_OP_SOFT_LIGHT;
case CAIRO_OPERATOR_DIFFERENCE:
return PIXMAN_OP_DIFFERENCE;
case CAIRO_OPERATOR_EXCLUSION:
return PIXMAN_OP_EXCLUSION;
case CAIRO_OPERATOR_HSL_HUE:
return PIXMAN_OP_HSL_HUE;
case CAIRO_OPERATOR_HSL_SATURATION:
return PIXMAN_OP_HSL_SATURATION;
case CAIRO_OPERATOR_HSL_COLOR:
return PIXMAN_OP_HSL_COLOR;
case CAIRO_OPERATOR_HSL_LUMINOSITY:
return PIXMAN_OP_HSL_LUMINOSITY;
default:
ASSERT_NOT_REACHED;
return PIXMAN_OP_OVER;
}
}
static void
_pixman_image_add_boxes (pixman_image_t *image,
int dst_x, int dst_y,
cairo_box_t *box,
int count)
{
while (count--) {
pixman_trapezoid_t trap;
trap.top = _cairo_fixed_to_16_16 (box->p1.y);
trap.bottom = _cairo_fixed_to_16_16 (box->p2.y);
trap.left.p1.x = _cairo_fixed_to_16_16 (box->p1.x);
trap.left.p1.y = _cairo_fixed_to_16_16 (box->p1.y);
trap.left.p2.x = _cairo_fixed_to_16_16 (box->p1.x);
trap.left.p2.y = _cairo_fixed_to_16_16 (box->p2.y);
trap.right.p1.x = _cairo_fixed_to_16_16 (box->p2.x);
trap.right.p1.y = _cairo_fixed_to_16_16 (box->p1.y);
trap.right.p2.x = _cairo_fixed_to_16_16 (box->p2.x);
trap.right.p2.y = _cairo_fixed_to_16_16 (box->p2.y);
pixman_rasterize_trapezoid (image, &trap, -dst_x, -dst_y);
box++;
}
}
static cairo_status_t
combine_in_boxes (cairo_image_surface_t *dst,
cairo_box_t *box, int count,
const cairo_rectangle_int_t *extents)
{
pixman_image_t *mask;
mask = pixman_image_create_bits (PIXMAN_a8,
extents->width, extents->height,
NULL, 0);
if (unlikely (mask == NULL))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
_pixman_image_add_boxes (mask, extents->x, extents->y, box, count);
pixman_image_composite32 (PIXMAN_OP_IN,
mask, NULL, dst->pixman_image,
0, 0,
0, 0,
0, 0,
extents->width, extents->height);
pixman_image_unref (mask);
return CAIRO_STATUS_SUCCESS;
}
static cairo_image_surface_t *
create_composite_mask (cairo_image_surface_t *dst,
void *draw_closure,
draw_func_t draw_func,
const cairo_composite_rectangles_t *extents)
{
cairo_image_surface_t *surface;
cairo_int_status_t status;
surface = (cairo_image_surface_t *)
_cairo_surface_create_similar_solid (&dst->base,
CAIRO_CONTENT_ALPHA,
extents->bounded.width,
extents->bounded.height,
CAIRO_COLOR_TRANSPARENT);
if (unlikely (surface->base.status))
return surface;
status = draw_func (surface, draw_closure,
CAIRO_OPERATOR_ADD, &_cairo_pattern_white.base,
extents->bounded.x, extents->bounded.y,
&extents->bounded);
if (unlikely (status))
goto error;
if (extents->clip->boxes) {
status = combine_in_boxes (surface,
extents->clip->boxes,
extents->clip->num_boxes,
&extents->bounded);
if (unlikely (status))
goto error;
}
if (extents->clip->path) {
status = _cairo_clip_combine_with_surface (extents->clip,
&surface->base,
extents->bounded.x,
extents->bounded.y);
if (unlikely (status))
goto error;
}
return surface;
error:
cairo_surface_destroy (&surface->base);
return (cairo_image_surface_t *)_cairo_surface_create_in_error (status);
}
/* Handles compositing with a clip surface when the operator allows
* us to combine the clip with the mask
*/
static cairo_status_t
clip_and_composite_with_mask (const cairo_composite_rectangles_t*extents,
draw_func_t draw_func,
void *draw_closure)
{
cairo_image_surface_t *dst = (cairo_image_surface_t *)extents->surface;
cairo_image_surface_t *mask;
pixman_image_t *src;
cairo_status_t status = CAIRO_STATUS_SUCCESS;
int src_x, src_y;
mask = create_composite_mask (dst, draw_closure, draw_func, extents);
if (unlikely (mask->base.status))
return mask->base.status;
src = _pixman_image_for_pattern (dst,
&extents->source_pattern.base, FALSE,
&extents->bounded,
&extents->source_sample_area,
&src_x, &src_y);
if (unlikely (src == NULL)) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto error;
}
pixman_image_composite32 (_pixman_operator (extents->op),
src, mask->pixman_image, dst->pixman_image,
extents->bounded.x + src_x,
extents->bounded.y + src_y,
0, 0,
extents->bounded.x, extents->bounded.y,
extents->bounded.width, extents->bounded.height);
pixman_image_unref (src);
error:
cairo_surface_destroy (&mask->base);
return status;
}
/* Handles compositing with a clip surface when we have to do the operation
* in two pieces and combine them together.
*/
static cairo_status_t
clip_and_composite_combine (const cairo_composite_rectangles_t*extents,
draw_func_t draw_func,
void *draw_closure)
{
cairo_image_surface_t *dst = (cairo_image_surface_t *)extents->surface;
cairo_image_surface_t *tmp, *clip;
int clip_x, clip_y;
cairo_status_t status;
tmp = (cairo_image_surface_t *)
_cairo_surface_create_similar_solid (&dst->base, dst->base.content,
extents->bounded.width,
extents->bounded.height,
CAIRO_COLOR_TRANSPARENT);
if (unlikely (tmp->base.status))
return tmp->base.status;
pixman_image_composite32 (PIXMAN_OP_SRC,
dst->pixman_image, NULL, tmp->pixman_image,
extents->bounded.x, extents->bounded.y,
0, 0,
0, 0,
extents->bounded.width, extents->bounded.height);
status = draw_func (tmp, draw_closure,
extents->op, &extents->source_pattern.base,
extents->bounded.x, extents->bounded.y,
&extents->bounded);
if (unlikely (status))
goto error;
clip = (cairo_image_surface_t *)
_cairo_clip_get_surface (extents->clip, &dst->base, &clip_x, &clip_y);
if (unlikely (clip->base.status))
goto error;
pixman_image_composite32 (PIXMAN_OP_OUT_REVERSE,
clip->pixman_image, NULL, dst->pixman_image,
extents->bounded.x - clip_x, extents->bounded.y - clip_y,
0, 0,
extents->bounded.x, extents->bounded.y,
extents->bounded.width, extents->bounded.height);
pixman_image_composite32 (PIXMAN_OP_ADD,
tmp->pixman_image, clip->pixman_image, dst->pixman_image,
0, 0,
extents->bounded.x - clip_x, extents->bounded.y - clip_y,
extents->bounded.x, extents->bounded.y,
extents->bounded.width, extents->bounded.height);
cairo_surface_destroy (&clip->base);
error:
cairo_surface_destroy (&tmp->base);
return status;
}
/* Handles compositing for %CAIRO_OPERATOR_SOURCE, which is special; it's
* defined as (src IN mask IN clip) ADD (dst OUT (mask IN clip))
*/
static cairo_status_t
clip_and_composite_source (const cairo_composite_rectangles_t *extents,
draw_func_t draw_func,
void *draw_closure)
{
cairo_image_surface_t *dst = (cairo_image_surface_t *)extents->surface;
cairo_image_surface_t *mask;
pixman_image_t *src;
int src_x, src_y;
cairo_status_t status = CAIRO_STATUS_SUCCESS;
mask = create_composite_mask (dst, draw_closure, draw_func, extents);
if (unlikely (mask->base.status))
return mask->base.status;
pixman_image_composite32 (PIXMAN_OP_OUT_REVERSE,
mask->pixman_image, NULL, dst->pixman_image,
0, 0,
0, 0,
extents->bounded.x, extents->bounded.y,
extents->bounded.width, extents->bounded.height);
src = _pixman_image_for_pattern (dst,
&extents->source_pattern.base, FALSE,
&extents->bounded,
&extents->source_sample_area,
&src_x, &src_y);
if (unlikely (src == NULL)) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto error;
}
pixman_image_composite32 (PIXMAN_OP_ADD,
src, mask->pixman_image, dst->pixman_image,
extents->bounded.x + src_x, extents->bounded.y + src_y,
0, 0,
extents->bounded.x, extents->bounded.y,
extents->bounded.width, extents->bounded.height);
pixman_image_unref (src);
error:
cairo_surface_destroy (&mask->base);
return status;
}
static cairo_status_t
fixup_unbounded (const cairo_composite_rectangles_t *extents)
{
cairo_image_surface_t *dst = (cairo_image_surface_t *)extents->surface;
pixman_image_t *mask;
int mask_x, mask_y;
if (! _cairo_clip_is_region (extents->clip)) {
cairo_surface_t *clip;
clip = _cairo_clip_get_surface (extents->clip, &dst->base,
&mask_x, &mask_y);
if (unlikely (clip->status))
return clip->status;
mask = pixman_image_ref (((cairo_image_surface_t *)clip)->pixman_image);
cairo_surface_destroy (clip);
} else {
mask_x = mask_y = 0;
mask = _pixman_image_for_color (CAIRO_COLOR_WHITE);
if (unlikely (mask == NULL))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
/* top */
if (extents->bounded.y != extents->unbounded.y) {
int x = extents->unbounded.x;
int y = extents->unbounded.y;
int width = extents->unbounded.width;
int height = extents->bounded.y - y;
pixman_image_composite32 (PIXMAN_OP_OUT_REVERSE,
mask, NULL, dst->pixman_image,
x - mask_x, y - mask_y,
0, 0,
x, y,
width, height);
}
/* left */
if (extents->bounded.x != extents->unbounded.x) {
int x = extents->unbounded.x;
int y = extents->bounded.y;
int width = extents->bounded.x - x;
int height = extents->bounded.height;
pixman_image_composite32 (PIXMAN_OP_OUT_REVERSE,
mask, NULL, dst->pixman_image,
x - mask_x, y - mask_y,
0, 0,
x, y,
width, height);
}
/* right */
if (extents->bounded.x + extents->bounded.width != extents->unbounded.x + extents->unbounded.width) {
int x = extents->bounded.x + extents->bounded.width;
int y = extents->bounded.y;
int width = extents->unbounded.x + extents->unbounded.width - x;
int height = extents->bounded.height;
pixman_image_composite32 (PIXMAN_OP_OUT_REVERSE,
mask, NULL, dst->pixman_image,
x - mask_x, y - mask_y,
0, 0,
x, y,
width, height);
}
/* bottom */
if (extents->bounded.y + extents->bounded.height != extents->unbounded.y + extents->unbounded.height) {
int x = extents->unbounded.x;
int y = extents->bounded.y + extents->bounded.height;
int width = extents->unbounded.width;
int height = extents->unbounded.y + extents->unbounded.height - y;
pixman_image_composite32 (PIXMAN_OP_OUT_REVERSE,
mask, NULL, dst->pixman_image,
x - mask_x, y - mask_y,
0, 0,
x, y,
width, height);
}
pixman_image_unref (mask);
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
set_clip_region (cairo_composite_rectangles_t *extents)
{
cairo_image_surface_t *dst = (cairo_image_surface_t *) extents->surface;
cairo_region_t *region = _cairo_clip_get_region (extents->clip);
pixman_region32_t *rgn = region ? &region->rgn : NULL;
if (! pixman_image_set_clip_region32 (dst->pixman_image, rgn))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
clip_and_composite (cairo_composite_rectangles_t *extents,
draw_func_t draw_func,
void *draw_closure)
{
cairo_status_t status;
status = set_clip_region (extents);
if (unlikely (status))
return status;
if (extents->op == CAIRO_OPERATOR_SOURCE) {
status = clip_and_composite_source (extents, draw_func, draw_closure);
} else {
if (extents->op == CAIRO_OPERATOR_CLEAR) {
extents->source_pattern.solid = _cairo_pattern_white;
extents->op = CAIRO_OPERATOR_DEST_OUT;
}
if (! _cairo_clip_is_region (extents->clip)) {
if (extents->is_bounded)
status = clip_and_composite_with_mask (extents, draw_func, draw_closure);
else
status = clip_and_composite_combine (extents, draw_func, draw_closure);
} else {
status = draw_func ((cairo_image_surface_t *) extents->surface,
draw_closure,
extents->op,
&extents->source_pattern.base,
0, 0,
&extents->bounded);
}
}
if (status == CAIRO_STATUS_SUCCESS && ! extents->is_bounded)
status = fixup_unbounded (extents);
return status;
}
/* high-level compositor interface */
static cairo_int_status_t
composite_paint (cairo_image_surface_t *dst,
void *closure,
cairo_operator_t op,
const cairo_pattern_t *pattern,
int dst_x,
int dst_y,
const cairo_rectangle_int_t *extents)
{
cairo_rectangle_int_t sample;
pixman_image_t *src;
int src_x, src_y;
_cairo_pattern_sampled_area (pattern, extents, &sample);
src = _pixman_image_for_pattern (dst,
pattern, FALSE,
extents, &sample,
&src_x, &src_y);
if (unlikely (src == NULL))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
pixman_image_composite32 (_pixman_operator (op),
src, NULL, dst->pixman_image,
extents->x + src_x, extents->y + src_y,
0, 0,
extents->x - dst_x, extents->y - dst_y,
extents->width, extents->height);
pixman_image_unref (src);
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
base_compositor_paint (const cairo_compositor_t *_compositor,
cairo_composite_rectangles_t *extents)
{
return clip_and_composite (extents, composite_paint, NULL);
}
static cairo_int_status_t
composite_mask (cairo_image_surface_t *dst,
void *closure,
cairo_operator_t op,
const cairo_pattern_t *pattern,
int dst_x,
int dst_y,
const cairo_rectangle_int_t *extents)
{
cairo_rectangle_int_t sample;
pixman_image_t *src, *mask;
int src_x, src_y;
int mask_x, mask_y;
_cairo_pattern_sampled_area (pattern, extents, &sample);
src = _pixman_image_for_pattern (dst, pattern, FALSE,
extents, &sample,
&src_x, &src_y);
if (unlikely (src == NULL))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
_cairo_pattern_sampled_area (closure, extents, &sample);
mask = _pixman_image_for_pattern (dst, closure, TRUE,
extents, &sample,
&mask_x, &mask_y);
if (unlikely (mask == NULL)) {
pixman_image_unref (src);
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
pixman_image_composite32 (_pixman_operator (op),
src, mask, dst->pixman_image,
extents->x + src_x, extents->y + src_y,
extents->x + mask_x, extents->y + mask_y,
extents->x - dst_x, extents->y - dst_y,
extents->width, extents->height);
pixman_image_unref (mask);
pixman_image_unref (src);
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
base_compositor_mask (const cairo_compositor_t *_compositor,
cairo_composite_rectangles_t *extents)
{
return clip_and_composite (extents, composite_mask, &extents->mask_pattern.base);
}
typedef struct {
cairo_traps_t traps;
cairo_antialias_t antialias;
} composite_traps_info_t;
#define CAIRO_FIXED_16_16_MIN _cairo_fixed_from_int (-32768)
#define CAIRO_FIXED_16_16_MAX _cairo_fixed_from_int (32767)
static cairo_bool_t
line_exceeds_16_16 (const cairo_line_t *line)
{
return
line->p1.x <= CAIRO_FIXED_16_16_MIN ||
line->p1.x >= CAIRO_FIXED_16_16_MAX ||
line->p2.x <= CAIRO_FIXED_16_16_MIN ||
line->p2.x >= CAIRO_FIXED_16_16_MAX ||
line->p1.y <= CAIRO_FIXED_16_16_MIN ||
line->p1.y >= CAIRO_FIXED_16_16_MAX ||
line->p2.y <= CAIRO_FIXED_16_16_MIN ||
line->p2.y >= CAIRO_FIXED_16_16_MAX;
}
static void
project_line_x_onto_16_16 (const cairo_line_t *line,
cairo_fixed_t top,
cairo_fixed_t bottom,
pixman_line_fixed_t *out)
{
/* XXX use fixed-point arithmetic? */
cairo_point_double_t p1, p2;
double m;
p1.x = _cairo_fixed_to_double (line->p1.x);
p1.y = _cairo_fixed_to_double (line->p1.y);
p2.x = _cairo_fixed_to_double (line->p2.x);
p2.y = _cairo_fixed_to_double (line->p2.y);
m = (p2.x - p1.x) / (p2.y - p1.y);
out->p1.x = _cairo_fixed_16_16_from_double (p1.x + m * _cairo_fixed_to_double (top - line->p1.y));
out->p2.x = _cairo_fixed_16_16_from_double (p1.x + m * _cairo_fixed_to_double (bottom - line->p1.y));
}
static void
_pixman_image_add_traps (pixman_image_t *image,
int dst_x, int dst_y,
cairo_traps_t *traps)
{
cairo_trapezoid_t *t = traps->traps;
int num_traps = traps->num_traps;
while (num_traps--) {
pixman_trapezoid_t trap;
/* top/bottom will be clamped to surface bounds */
trap.top = _cairo_fixed_to_16_16 (t->top);
trap.bottom = _cairo_fixed_to_16_16 (t->bottom);
/* However, all the other coordinates will have been left untouched so
* as not to introduce numerical error. Recompute them if they
* exceed the 16.16 limits.
*/
if (unlikely (line_exceeds_16_16 (&t->left))) {
project_line_x_onto_16_16 (&t->left, t->top, t->bottom, &trap.left);
trap.left.p1.y = trap.top;
trap.left.p2.y = trap.bottom;
} else {
trap.left.p1.x = _cairo_fixed_to_16_16 (t->left.p1.x);
trap.left.p1.y = _cairo_fixed_to_16_16 (t->left.p1.y);
trap.left.p2.x = _cairo_fixed_to_16_16 (t->left.p2.x);
trap.left.p2.y = _cairo_fixed_to_16_16 (t->left.p2.y);
}
if (unlikely (line_exceeds_16_16 (&t->right))) {
project_line_x_onto_16_16 (&t->right, t->top, t->bottom, &trap.right);
trap.right.p1.y = trap.top;
trap.right.p2.y = trap.bottom;
} else {
trap.right.p1.x = _cairo_fixed_to_16_16 (t->right.p1.x);
trap.right.p1.y = _cairo_fixed_to_16_16 (t->right.p1.y);
trap.right.p2.x = _cairo_fixed_to_16_16 (t->right.p2.x);
trap.right.p2.y = _cairo_fixed_to_16_16 (t->right.p2.y);
}
pixman_rasterize_trapezoid (image, &trap, -dst_x, -dst_y);
t++;
}
}
static cairo_int_status_t
composite_traps (cairo_image_surface_t *dst,
void *closure,
cairo_operator_t op,
const cairo_pattern_t *pattern,
int dst_x,
int dst_y,
const cairo_rectangle_int_t *extents)
{
composite_traps_info_t *info = closure;
cairo_rectangle_int_t sample;
pixman_image_t *src, *mask;
int src_x, src_y;
_cairo_pattern_sampled_area (pattern, extents, &sample);
src = _pixman_image_for_pattern (dst, pattern, FALSE,
extents, &sample,
&src_x, &src_y);
if (unlikely (src == NULL))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
mask = pixman_image_create_bits (info->antialias == CAIRO_ANTIALIAS_NONE ? PIXMAN_a1 : PIXMAN_a8,
extents->width, extents->height,
NULL, 0);
if (unlikely (mask == NULL)) {
pixman_image_unref (src);
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
_pixman_image_add_traps (mask, extents->x, extents->y, &info->traps);
pixman_image_composite32 (_pixman_operator (op),
src, mask, dst->pixman_image,
extents->x + src_x - dst_x, extents->y + src_y - dst_y,
0, 0,
extents->x - dst_x, extents->y - dst_y,
extents->width, extents->height);
pixman_image_unref (mask);
pixman_image_unref (src);
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
trim_extents_to_traps (cairo_composite_rectangles_t *extents,
cairo_traps_t *traps)
{
cairo_box_t box;
/* X trims the affected area to the extents of the trapezoids, so
* we need to compensate when fixing up the unbounded area.
*/
_cairo_traps_extents (traps, &box);
return _cairo_composite_rectangles_intersect_mask_extents (extents, &box);
}
static cairo_int_status_t
base_compositor_stroke (const cairo_compositor_t *_compositor,
cairo_composite_rectangles_t *extents,
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)
{
composite_traps_info_t info;
cairo_int_status_t status;
info.antialias = antialias;
_cairo_traps_init_with_clip (&info.traps, extents->clip);
status = _cairo_path_fixed_stroke_to_traps (path, style,
ctm, ctm_inverse,
tolerance,
&info.traps);
if (likely (status == CAIRO_INT_STATUS_SUCCESS))
status = trim_extents_to_traps (extents, &info.traps);
if (likely (status == CAIRO_INT_STATUS_SUCCESS))
status = clip_and_composite (extents, composite_traps, &info);
_cairo_traps_fini (&info.traps);
return status;
}
static cairo_int_status_t
base_compositor_fill (const cairo_compositor_t *_compositor,
cairo_composite_rectangles_t *extents,
const cairo_path_fixed_t *path,
cairo_fill_rule_t fill_rule,
double tolerance,
cairo_antialias_t antialias)
{
composite_traps_info_t info;
cairo_int_status_t status;
info.antialias = antialias;
_cairo_traps_init_with_clip (&info.traps, extents->clip);
status = _cairo_path_fixed_fill_to_traps (path,
fill_rule, tolerance,
&info.traps);
if (likely (status == CAIRO_INT_STATUS_SUCCESS))
status = trim_extents_to_traps (extents, &info.traps);
if (likely (status == CAIRO_INT_STATUS_SUCCESS))
status = clip_and_composite (extents, composite_traps, &info);
_cairo_traps_fini (&info.traps);
return status;
}
static cairo_int_status_t
composite_glyphs (cairo_image_surface_t *dst,
void *closure,
cairo_operator_t op,
const cairo_pattern_t *pattern,
int dst_x,
int dst_y,
const cairo_rectangle_int_t *extents)
{
cairo_composite_glyphs_info_t *info = closure;
pixman_image_t *mask;
cairo_status_t status;
int i;
mask = pixman_image_create_bits (PIXMAN_a8,
extents->width, extents->height,
NULL, 0);
if (unlikely (mask == NULL))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
status = CAIRO_STATUS_SUCCESS;
_cairo_scaled_font_freeze_cache (info->font);
for (i = 0; i < info->num_glyphs; i++) {
cairo_image_surface_t *glyph_surface;
cairo_scaled_glyph_t *scaled_glyph;
unsigned long glyph_index = info->glyphs[i].index;
int x, y;
status = _cairo_scaled_glyph_lookup (info->font, glyph_index,
CAIRO_SCALED_GLYPH_INFO_SURFACE,
&scaled_glyph);
if (unlikely (status))
break;
glyph_surface = scaled_glyph->surface;
if (glyph_surface->width && glyph_surface->height) {
/* round glyph locations to the nearest pixel */
/* XXX: FRAGILE: We're ignoring device_transform scaling here. A bug? */
x = _cairo_lround (info->glyphs[i].x -
glyph_surface->base.device_transform.x0);
y = _cairo_lround (info->glyphs[i].y -
glyph_surface->base.device_transform.y0);
pixman_image_composite32 (PIXMAN_OP_ADD,
glyph_surface->pixman_image, NULL, mask,
0, 0,
0, 0,
x - extents->x, y - extents->y,
glyph_surface->width,
glyph_surface->height);
}
}
_cairo_scaled_font_thaw_cache (info->font);
if (status == CAIRO_STATUS_SUCCESS) {
cairo_rectangle_int_t sample;
pixman_image_t *src;
int src_x, src_y;
_cairo_pattern_sampled_area (pattern, extents, &sample);
src = _pixman_image_for_pattern (dst, pattern, FALSE,
extents, &sample,
&src_x, &src_y);
if (src != NULL) {
dst_x = extents->x - dst_x;
dst_y = extents->y - dst_y;
pixman_image_composite32 (_pixman_operator (op),
src, mask, dst->pixman_image,
src_x + dst_x, src_y + dst_y,
0, 0,
dst_x, dst_y,
extents->width, extents->height);
pixman_image_unref (src);
} else
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
pixman_image_unref (mask);
return status;
}
static cairo_int_status_t
base_compositor_glyphs (const cairo_compositor_t *_compositor,
cairo_composite_rectangles_t *extents,
cairo_scaled_font_t *scaled_font,
cairo_glyph_t *glyphs,
int num_glyphs,
cairo_bool_t overlap)
{
cairo_composite_glyphs_info_t info;
info.font = scaled_font;
info.glyphs = glyphs;
info.num_glyphs = num_glyphs;
return clip_and_composite (extents, composite_glyphs, &info);
}
static const cairo_compositor_t base_compositor = {
&__cairo_no_compositor,
base_compositor_paint,
base_compositor_mask,
base_compositor_stroke,
base_compositor_fill,
base_compositor_glyphs,
};
cairo_surface_t *
_cairo_test_base_compositor_surface_create (cairo_content_t content,
int width,
int height)
{
return test_compositor_surface_create (&base_compositor,
content, width, height);
}
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