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/*
* Copyright © 2008 Chris Wilson
*
* 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
* Chris Wilson not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior
* permission. Chris Wilson makes no representations about the
* suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* CHRIS WILSON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL CHRIS WILSON 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: Chris Wilson <chris@chris-wilson.co.uk>
*/
#include "cairo-test.h"
#include <assert.h>
/* Test the idempotency of write_png->read_png */
#define RGB_MASK 0x00ffffff
static cairo_bool_t
image_surface_equals (cairo_surface_t *A, cairo_surface_t *B)
{
if (cairo_image_surface_get_format (A) !=
cairo_image_surface_get_format (B))
return 0;
if (cairo_image_surface_get_width (A) !=
cairo_image_surface_get_width (B))
return 0;
if (cairo_image_surface_get_height (A) !=
cairo_image_surface_get_height (B))
return 0;
return 1;
}
static const char *
format_to_string (cairo_format_t format)
{
switch (format) {
case CAIRO_FORMAT_A1: return "a1";
case CAIRO_FORMAT_A8: return "a8";
case CAIRO_FORMAT_RGB24: return "rgb24";
case CAIRO_FORMAT_ARGB32: return "argb32";
default: return "???";
}
}
static void
print_surface (const cairo_test_context_t *ctx, cairo_surface_t *surface)
{
cairo_test_log (ctx,
"%s (%dx%d)\n",
format_to_string (cairo_image_surface_get_format (surface)),
cairo_image_surface_get_width (surface),
cairo_image_surface_get_height (surface));
}
static cairo_test_status_t
preamble (cairo_test_context_t *ctx)
{
const char *filename = "png.out.png";
cairo_surface_t *surface0, *surface1;
cairo_status_t status;
uint32_t argb32 = 0xdeadbede;
cairo_test_status_t result = CAIRO_TEST_SUCCESS;
surface0 = cairo_image_surface_create_for_data ((unsigned char *) &argb32,
CAIRO_FORMAT_ARGB32,
1, 1, 4);
assert (cairo_surface_status (surface0) == CAIRO_STATUS_SUCCESS);
status = cairo_surface_write_to_png (surface0, filename);
if (status) {
cairo_test_log (ctx, "Error writing '%s': %s\n",
filename, cairo_status_to_string (status));
result = CAIRO_TEST_FAILURE;
}
surface1 = cairo_image_surface_create_from_png (filename);
status = cairo_surface_status (surface1);
if (status) {
cairo_test_log (ctx, "Error reading '%s': %s\n",
filename, cairo_status_to_string (status));
result = CAIRO_TEST_FAILURE;
}
if (! image_surface_equals (surface0, surface1)) {
cairo_test_log (ctx, "Error surface mismatch.\n");
cairo_test_log (ctx, "to png: "); print_surface (ctx, surface0);
cairo_test_log (ctx, "from png: "); print_surface (ctx, surface1);
result = CAIRO_TEST_FAILURE;
}
assert (*(uint32_t *) cairo_image_surface_get_data (surface1) == argb32);
cairo_surface_destroy (surface0);
cairo_surface_destroy (surface1);
surface0 = cairo_image_surface_create_for_data ((unsigned char *) &argb32,
CAIRO_FORMAT_RGB24,
1, 1, 4);
assert (cairo_surface_status (surface0) == CAIRO_STATUS_SUCCESS);
status = cairo_surface_write_to_png (surface0, filename);
if (status) {
cairo_test_log (ctx, "Error writing '%s': %s\n",
filename, cairo_status_to_string (status));
result = CAIRO_TEST_FAILURE;
}
surface1 = cairo_image_surface_create_from_png (filename);
status = cairo_surface_status (surface1);
if (status) {
cairo_test_log (ctx, "Error reading '%s': %s\n",
filename, cairo_status_to_string (status));
result = CAIRO_TEST_FAILURE;
}
if (! image_surface_equals (surface0, surface1)) {
cairo_test_log (ctx, "Error surface mismatch.\n");
cairo_test_log (ctx, "to png: "); print_surface (ctx, surface0);
cairo_test_log (ctx, "from png: "); print_surface (ctx, surface1);
result = CAIRO_TEST_FAILURE;
}
assert ((*(uint32_t *) cairo_image_surface_get_data (surface1) & RGB_MASK)
== (argb32 & RGB_MASK));
cairo_surface_destroy (surface0);
cairo_surface_destroy (surface1);
return result;
}
CAIRO_TEST (png,
"Check that the png export/import is idempotent.",
"png, api", /* keywords */
NULL, /* requirements */
0, 0,
preamble, NULL)
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