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
33 #define BASENAME "png.out"
36 image_surface_equals (cairo_surface_t *A, cairo_surface_t *B)
38 if (cairo_image_surface_get_format (A) !=
39 cairo_image_surface_get_format (B))
42 if (cairo_image_surface_get_width (A) !=
43 cairo_image_surface_get_width (B))
46 if (cairo_image_surface_get_height (A) !=
47 cairo_image_surface_get_height (B))
54 format_to_string (cairo_format_t format)
57 case CAIRO_FORMAT_A1: return "a1";
58 case CAIRO_FORMAT_A8: return "a8";
59 case CAIRO_FORMAT_RGB16_565: return "rgb16";
60 case CAIRO_FORMAT_RGB24: return "rgb24";
61 case CAIRO_FORMAT_RGB30: return "rgb30";
62 case CAIRO_FORMAT_ARGB32: return "argb32";
63 case CAIRO_FORMAT_INVALID:
64 default: return "???";
69 print_surface (const cairo_test_context_t *ctx, cairo_surface_t *surface)
73 format_to_string (cairo_image_surface_get_format (surface)),
74 cairo_image_surface_get_width (surface),
75 cairo_image_surface_get_height (surface));
78 static cairo_test_status_t
79 preamble (cairo_test_context_t *ctx)
81 cairo_surface_t *surface0, *surface1;
82 cairo_status_t status;
83 uint32_t argb32 = 0xdeadbede;
85 const char *path = cairo_test_mkdir (CAIRO_TEST_OUTPUT_DIR) ? CAIRO_TEST_OUTPUT_DIR : ".";
87 xasprintf (&filename, "%s/%s.png", path, BASENAME);
88 surface0 = cairo_image_surface_create_for_data ((unsigned char *) &argb32,
91 status = cairo_surface_write_to_png (surface0, filename);
93 cairo_test_log (ctx, "Error writing '%s': %s\n",
94 filename, cairo_status_to_string (status));
96 cairo_surface_destroy (surface0);
98 return cairo_test_status_from_status (ctx, status);
100 surface1 = cairo_image_surface_create_from_png (filename);
101 status = cairo_surface_status (surface1);
103 cairo_test_log (ctx, "Error reading '%s': %s\n",
104 filename, cairo_status_to_string (status));
106 cairo_surface_destroy (surface1);
107 cairo_surface_destroy (surface0);
109 return cairo_test_status_from_status (ctx, status);
112 if (! image_surface_equals (surface0, surface1)) {
113 cairo_test_log (ctx, "Error surface mismatch.\n");
114 cairo_test_log (ctx, "to png: "); print_surface (ctx, surface0);
115 cairo_test_log (ctx, "from png: "); print_surface (ctx, surface1);
117 cairo_surface_destroy (surface0);
118 cairo_surface_destroy (surface1);
120 return CAIRO_TEST_FAILURE;
122 assert (*(uint32_t *) cairo_image_surface_get_data (surface1) == argb32);
124 cairo_surface_destroy (surface0);
125 cairo_surface_destroy (surface1);
127 surface0 = cairo_image_surface_create_for_data ((unsigned char *) &argb32,
130 status = cairo_surface_write_to_png (surface0, filename);
132 cairo_test_log (ctx, "Error writing '%s': %s\n",
133 filename, cairo_status_to_string (status));
134 cairo_surface_destroy (surface0);
135 return cairo_test_status_from_status (ctx, status);
137 surface1 = cairo_image_surface_create_from_png (filename);
138 status = cairo_surface_status (surface1);
141 cairo_test_log (ctx, "Error reading '%s': %s\n",
142 filename, cairo_status_to_string (status));
144 cairo_surface_destroy (surface1);
145 cairo_surface_destroy (surface0);
146 return cairo_test_status_from_status (ctx, status);
149 if (! image_surface_equals (surface0, surface1)) {
150 cairo_test_log (ctx, "Error surface mismatch.\n");
151 cairo_test_log (ctx, "to png: "); print_surface (ctx, surface0);
152 cairo_test_log (ctx, "from png: "); print_surface (ctx, surface1);
154 cairo_surface_destroy (surface0);
155 cairo_surface_destroy (surface1);
156 return CAIRO_TEST_FAILURE;
158 assert ((*(uint32_t *) cairo_image_surface_get_data (surface1) & RGB_MASK)
159 == (argb32 & RGB_MASK));
161 cairo_surface_destroy (surface0);
162 cairo_surface_destroy (surface1);
164 return CAIRO_TEST_SUCCESS;
168 "Check that the png export/import is idempotent.",
169 "png, api", /* keywords */
170 NULL, /* requirements */