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/*
* Copyright © 2005 Red Hat, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software
* and its documentation for any purpose is hereby granted without
* fee, provided that the above copyright notice appear in all copies
* and that both that copyright notice and this permission notice
* appear in supporting documentation, and that the name of
* Red Hat, Inc. not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior
* permission. Red Hat, Inc. makes no representations about the
* suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
* RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL RED HAT, INC. BE LIABLE FOR ANY SPECIAL,
* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
* IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
* Author: Carl Worth <cworth@cworth.org>
*/
#include "cairo-test.h"
#include <stdlib.h>
#define WIDTH 2
#define HEIGHT 2
static cairo_status_t
no_memory_error (void *closure, unsigned char *data, unsigned int size)
{
return CAIRO_STATUS_NO_MEMORY;
}
read_error (void *closure, unsigned char *data, unsigned int size)
return CAIRO_STATUS_READ_ERROR;
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
const cairo_test_context_t *ctx = cairo_test_get_context (cr);
char *filename;
cairo_surface_t *surface;
xasprintf (&filename, "%s/reference/%s",
ctx->srcdir, "create-from-png.ref.png");
surface = cairo_image_surface_create_from_png (filename);
if (cairo_surface_status (surface)) {
cairo_test_status_t result;
result = cairo_test_status_from_status (ctx,
cairo_surface_status (surface));
if (result == CAIRO_TEST_FAILURE) {
cairo_test_log (ctx, "Error reading PNG image %s: %s\n",
filename,
cairo_status_to_string (cairo_surface_status (surface)));
free (filename);
return result;
/* Pretend we modify the surface data (which detaches the PNG mime data) */
cairo_surface_flush (surface);
cairo_surface_mark_dirty (surface);
cairo_set_source_surface (cr, surface, 0, 0);
cairo_pattern_set_filter (cairo_get_source (cr), CAIRO_FILTER_NEAREST);
cairo_paint (cr);
cairo_surface_destroy (surface);
return CAIRO_TEST_SUCCESS;
preamble (cairo_test_context_t *ctx)
char *path;
cairo_status_t status;
cairo_test_status_t result = CAIRO_TEST_SUCCESS;
surface = cairo_image_surface_create_from_png ("___THIS_FILE_DOES_NOT_EXIST___");
if (cairo_surface_status (surface) != CAIRO_STATUS_FILE_NOT_FOUND) {
cairo_test_log (ctx, "Error: expected \"file not found\", but got: %s\n",
if (result != CAIRO_TEST_SUCCESS)
surface = cairo_image_surface_create_from_png_stream (no_memory_error, NULL);
if (cairo_surface_status (surface) != CAIRO_STATUS_NO_MEMORY) {
cairo_test_log (ctx, "Error: expected \"out of memory\", but got: %s\n",
surface = cairo_image_surface_create_from_png_stream (read_error, NULL);
if (cairo_surface_status (surface) != CAIRO_STATUS_READ_ERROR) {
cairo_test_log (ctx, "Error: expected \"read error\", but got: %s\n",
/* cheekily test error propagation from the user write funcs as well ... */
xasprintf (&path, "%s/reference", ctx->srcdir);
xasprintf (&filename, "%s/%s", path, "create-from-png.ref.png");
} else {
status = cairo_surface_write_to_png_stream (surface,
(cairo_write_func_t) no_memory_error,
NULL);
if (status != CAIRO_STATUS_NO_MEMORY) {
result = cairo_test_status_from_status (ctx, status);
cairo_status_to_string (status));
(cairo_write_func_t) read_error,
if (status != CAIRO_STATUS_READ_ERROR) {
/* and check that error has not propagated to the surface */
cairo_test_log (ctx, "Error: user write error propagated to surface: %s",
/* check that loading alpha/opaque PNGs generate the correct surfaces */
/* TODO: Avoid using target-specific references as sample images */
xasprintf (&filename, "%s/%s", path, "create-from-png.alpha.ref.png");
} else if (cairo_image_surface_get_format (surface) != CAIRO_FORMAT_ARGB32) {
cairo_test_log (ctx, "Error reading PNG image %s: did not create an ARGB32 image\n",
filename);
result = CAIRO_TEST_FAILURE;
} else if (cairo_image_surface_get_format (surface) != CAIRO_FORMAT_RGB24) {
cairo_test_log (ctx, "Error reading PNG image %s: did not create an RGB24 image\n",
/* check paletted PNGs */
xasprintf (&filename, "%s/%s", path, "create-from-png.indexed-alpha.ref.png");
xasprintf (&filename, "%s/%s", path, "create-from-png.indexed.ref.png");
/* check grayscale PNGs */
xasprintf (&filename, "%s/%s", path, "create-from-png.gray-alpha.ref.png");
xasprintf (&filename, "%s/%s", path, "create-from-png.gray.ref.png");
free (path);
CAIRO_TEST (create_from_png,
"Tests the creation of an image surface from a PNG file",
"png", /* keywords */
NULL, /* requirements */
WIDTH, HEIGHT,
preamble, draw)