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/*
* Copyright 2009 Benjamin Otte
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
* Author: Benjamin Otte <otte@gnome.org>
*/
#define GENERATE_REFERENCE 0
#include "cairo-test.h"
#if !GENERATE_REFERENCE
#include <pthread.h>
#endif
#define N_THREADS 8
#define WIDTH 64
#define HEIGHT 8
typedef struct {
cairo_surface_t *target;
cairo_surface_t *source;
int id;
} thread_data_t;
static void *
draw_thread (void *arg)
{
thread_data_t *thread_data = arg;
cairo_surface_t *surface;
cairo_pattern_t *pattern;
cairo_matrix_t pattern_matrix = { 2, 0, 0, 2, 0, 0 };
cairo_t *cr;
int x, y;
cr = cairo_create (thread_data->target);
cairo_surface_destroy (thread_data->target);
pattern = cairo_pattern_create_for_surface (thread_data->source);
cairo_surface_destroy (thread_data->source);
cairo_pattern_set_extend (pattern, thread_data->id % 4);
cairo_pattern_set_filter (pattern, thread_data->id >= 4 ? CAIRO_FILTER_BILINEAR : CAIRO_FILTER_NEAREST);
cairo_pattern_set_matrix (pattern, &pattern_matrix);
for (y = 0; y < HEIGHT; y++) {
for (x = 0; x < WIDTH; x++) {
cairo_save (cr);
cairo_translate (cr, 4 * x + 1, 4 * y + 1);
cairo_rectangle (cr, 0, 0, 2, 2);
cairo_set_source (cr, pattern);
cairo_fill (cr);
cairo_restore (cr);
}
cairo_pattern_destroy (pattern);
surface = cairo_surface_reference (cairo_get_target (cr));
cairo_destroy (cr);
return surface;
static cairo_surface_t *
create_source (cairo_surface_t *similar)
double colors[4][3] = {
{ 0.75, 0, 0 },
{ 0, 0.75, 0 },
{ 0, 0, 0.75 },
{ 0.75, 0.75, 0 }
};
int i;
source = cairo_surface_create_similar (similar,
CAIRO_CONTENT_COLOR_ALPHA,
2, 2);
cr = cairo_create (source);
cairo_surface_destroy (source);
for (i = 0; i < 4; i++) {
cairo_set_source_rgb (cr, colors[i][0], colors[i][1], colors[i][2]);
cairo_rectangle (cr, i % 2, i / 2, 1, 1);
source = cairo_surface_reference (cairo_get_target (cr));
return source;
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
pthread_t threads[N_THREADS];
thread_data_t thread_data[N_THREADS];
cairo_test_status_t test_status = CAIRO_TEST_SUCCESS;
cairo_status_t status;
source = create_source (cairo_get_target (cr));
status = cairo_surface_status (source);
if (status) {
return cairo_test_status_from_status (cairo_test_get_context (cr),
status);
cairo_set_source_rgb (cr, 0.5, 0.5, 0.5);
cairo_paint (cr);
for (i = 0; i < N_THREADS; i++) {
thread_data[i].target = cairo_surface_create_similar (cairo_get_target (cr),
4 * WIDTH, 4 * HEIGHT);
thread_data[i].source = cairo_surface_reference (source);
thread_data[i].id = i;
if (pthread_create (&threads[i], NULL, draw_thread, &thread_data[i]) != 0) {
threads[i] = pthread_self (); /* to indicate error */
cairo_surface_destroy (thread_data[i].target);
cairo_surface_destroy (thread_data[i].source);
test_status = CAIRO_TEST_FAILURE;
break;
#else
cairo_surface_t *surface = draw_thread(&thread_data[i]);
cairo_set_source_surface (cr, surface, 0, 0);
cairo_surface_destroy (surface);
cairo_translate (cr, 0, 4 * HEIGHT);
void *surface;
if (pthread_equal (threads[i], pthread_self ()))
if (pthread_join (threads[i], &surface) == 0) {
} else {
return test_status;
CAIRO_TEST (pthread_same_source,
"Use the same source for drawing in different threads",
"threads", /* keywords */
NULL, /* requirements */
4 * WIDTH, 4 * HEIGHT * N_THREADS,
NULL, draw)