2 * Copyright © 2008 Chris Wilson
4 * Permission to use, copy, modify, distribute, and sell this software
5 * and its documentation for any purpose is hereby granted without
6 * fee, provided that the above copyright notice appear in all copies
7 * and that both that copyright notice and this permission notice
8 * appear in supporting documentation, and that the name of
9 * Chris Wilson not be used in advertising or publicity pertaining to
10 * distribution of the software without specific, written prior
11 * permission. Chris Wilson makes no representations about the
12 * suitability of this software for any purpose. It is provided "as
13 * is" without express or implied warranty.
15 * CHRIS WILSON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
16 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
17 * FITNESS, IN NO EVENT SHALL CHRIS WILSON BE LIABLE FOR ANY SPECIAL,
18 * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
19 * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
20 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
21 * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
23 * Author: Chris Wilson <chris@chris-wilson.co.uk>
26 #include "cairo-test.h"
30 /* Test the idempotency of write_png->read_png */
32 #define RGB_MASK 0x00ffffff
35 image_surface_equals (cairo_surface_t *A, cairo_surface_t *B)
37 if (cairo_image_surface_get_format (A) !=
38 cairo_image_surface_get_format (B))
41 if (cairo_image_surface_get_width (A) !=
42 cairo_image_surface_get_width (B))
45 if (cairo_image_surface_get_height (A) !=
46 cairo_image_surface_get_height (B))
53 format_to_string (cairo_format_t format)
56 case CAIRO_FORMAT_A1: return "a1";
57 case CAIRO_FORMAT_A8: return "a8";
58 case CAIRO_FORMAT_RGB16_565: return "rgb16";
59 case CAIRO_FORMAT_RGB24: return "rgb24";
60 case CAIRO_FORMAT_ARGB32: return "argb32";
61 case CAIRO_FORMAT_INVALID:
62 default: return "???";
67 print_surface (const cairo_test_context_t *ctx, cairo_surface_t *surface)
71 format_to_string (cairo_image_surface_get_format (surface)),
72 cairo_image_surface_get_width (surface),
73 cairo_image_surface_get_height (surface));
76 static cairo_test_status_t
77 preamble (cairo_test_context_t *ctx)
79 const char *filename = "png.out.png";
80 cairo_surface_t *surface0, *surface1;
81 cairo_status_t status;
82 uint32_t argb32 = 0xdeadbede;
84 surface0 = cairo_image_surface_create_for_data ((unsigned char *) &argb32,
87 status = cairo_surface_write_to_png (surface0, filename);
89 cairo_test_log (ctx, "Error writing '%s': %s\n",
90 filename, cairo_status_to_string (status));
92 cairo_surface_destroy (surface0);
93 return cairo_test_status_from_status (ctx, status);
95 surface1 = cairo_image_surface_create_from_png (filename);
96 status = cairo_surface_status (surface1);
98 cairo_test_log (ctx, "Error reading '%s': %s\n",
99 filename, cairo_status_to_string (status));
101 cairo_surface_destroy (surface1);
102 cairo_surface_destroy (surface0);
103 return cairo_test_status_from_status (ctx, status);
106 if (! image_surface_equals (surface0, surface1)) {
107 cairo_test_log (ctx, "Error surface mismatch.\n");
108 cairo_test_log (ctx, "to png: "); print_surface (ctx, surface0);
109 cairo_test_log (ctx, "from png: "); print_surface (ctx, surface1);
111 cairo_surface_destroy (surface0);
112 cairo_surface_destroy (surface1);
113 return CAIRO_TEST_FAILURE;
115 assert (*(uint32_t *) cairo_image_surface_get_data (surface1) == argb32);
117 cairo_surface_destroy (surface0);
118 cairo_surface_destroy (surface1);
120 surface0 = cairo_image_surface_create_for_data ((unsigned char *) &argb32,
123 status = cairo_surface_write_to_png (surface0, filename);
125 cairo_test_log (ctx, "Error writing '%s': %s\n",
126 filename, cairo_status_to_string (status));
127 cairo_surface_destroy (surface0);
128 return cairo_test_status_from_status (ctx, status);
130 surface1 = cairo_image_surface_create_from_png (filename);
131 status = cairo_surface_status (surface1);
133 cairo_test_log (ctx, "Error reading '%s': %s\n",
134 filename, cairo_status_to_string (status));
136 cairo_surface_destroy (surface1);
137 cairo_surface_destroy (surface0);
138 return cairo_test_status_from_status (ctx, status);
141 if (! image_surface_equals (surface0, surface1)) {
142 cairo_test_log (ctx, "Error surface mismatch.\n");
143 cairo_test_log (ctx, "to png: "); print_surface (ctx, surface0);
144 cairo_test_log (ctx, "from png: "); print_surface (ctx, surface1);
146 cairo_surface_destroy (surface0);
147 cairo_surface_destroy (surface1);
148 return CAIRO_TEST_FAILURE;
150 assert ((*(uint32_t *) cairo_image_surface_get_data (surface1) & RGB_MASK)
151 == (argb32 & RGB_MASK));
153 cairo_surface_destroy (surface0);
154 cairo_surface_destroy (surface1);
156 return CAIRO_TEST_SUCCESS;
160 "Check that the png export/import is idempotent.",
161 "png, api", /* keywords */
162 NULL, /* requirements */