| /* |
| * 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_RGB16_565: return "rgb16"; |
| case CAIRO_FORMAT_RGB24: return "rgb24"; |
| 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) |
| { |
| const char *filename = "png.out.png"; |
| cairo_surface_t *surface0, *surface1; |
| cairo_status_t status; |
| uint32_t argb32 = 0xdeadbede; |
| |
| 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); |
| 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); |
| 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); |
| 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)); |
| |
| cairo_surface_destroy (surface1); |
| cairo_surface_destroy (surface0); |
| 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); |
| 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) |