diff options
Diffstat (limited to 'libs/cairo-1.16.0/test/png.c')
| -rw-r--r-- | libs/cairo-1.16.0/test/png.c | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/libs/cairo-1.16.0/test/png.c b/libs/cairo-1.16.0/test/png.c new file mode 100644 index 0000000..cd11fd0 --- /dev/null +++ b/libs/cairo-1.16.0/test/png.c @@ -0,0 +1,173 @@ +/* + * 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 +#define BASENAME "png.out" + +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_RGB16_565: return "rgb16"; + case CAIRO_FORMAT_RGB24: return "rgb24"; + case CAIRO_FORMAT_RGB30: return "rgb30"; + case CAIRO_FORMAT_ARGB32: return "argb32"; + case CAIRO_FORMAT_INVALID: + 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) +{ + cairo_surface_t *surface0, *surface1; + cairo_status_t status; + uint32_t argb32 = 0xdeadbede; + char *filename; + const char *path = cairo_test_mkdir (CAIRO_TEST_OUTPUT_DIR) ? CAIRO_TEST_OUTPUT_DIR : "."; + + xasprintf (&filename, "%s/%s.png", path, BASENAME); + surface0 = cairo_image_surface_create_for_data ((unsigned char *) &argb32, + CAIRO_FORMAT_ARGB32, + 1, 1, 4); + 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)); + + cairo_surface_destroy (surface0); + free (filename); + return cairo_test_status_from_status (ctx, status); + } + 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)); + + cairo_surface_destroy (surface1); + cairo_surface_destroy (surface0); + free (filename); + return cairo_test_status_from_status (ctx, status); + } + + 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); + + cairo_surface_destroy (surface0); + cairo_surface_destroy (surface1); + free (filename); + return 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); + 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)); + cairo_surface_destroy (surface0); + return cairo_test_status_from_status (ctx, status); + } + 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)); + free (filename); + + cairo_surface_destroy (surface1); + cairo_surface_destroy (surface0); + return cairo_test_status_from_status (ctx, status); + } + free (filename); + + 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); + + cairo_surface_destroy (surface0); + cairo_surface_destroy (surface1); + return 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 CAIRO_TEST_SUCCESS; +} + +CAIRO_TEST (png, + "Check that the png export/import is idempotent.", + "png, api", /* keywords */ + NULL, /* requirements */ + 0, 0, + preamble, NULL) |