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31 #include "weston-test-client-helper.h"
33 char *server_parameters="--use-pixman --width=320 --height=240";
36 draw_stuff(pixman_image_t *image)
39 int stride; /* bytes */
44 pixman_format_code_t fmt;
46 fmt = pixman_image_get_format(image);
47 w = pixman_image_get_width(image);
48 h = pixman_image_get_height(image);
49 stride = pixman_image_get_stride(image);
50 pixels = pixman_image_get_data(image);
52 assert(PIXMAN_FORMAT_BPP(fmt) == 32);
54 for (x = 0; x < w; x++)
55 for (y = 0; y < h; y++) {
59 pixel = pixels + (y * stride / 4) + x;
60 *pixel = (255 << 24) | (r << 16) | (g << 8) | b;
64 TEST(internal_screenshot)
67 struct client *client;
68 struct wl_surface *surface;
69 struct buffer *screenshot = NULL;
70 pixman_image_t *reference_good = NULL;
71 pixman_image_t *reference_bad = NULL;
72 pixman_image_t *diffimg;
73 struct rectangle clip;
76 bool dump_all_images = true;
78 /* Create the client */
79 printf("Creating client for test\n");
80 client = create_client_and_test_surface(100, 100, 100, 100);
82 surface = client->surface->wl_surface;
85 * We are racing our screenshooting against weston-desktop-shell
86 * setting the cursor. If w-d-s wins, our screenshot will have a cursor
87 * shown, which makes the image comparison fail. Our window and the
88 * default pointer position are accidentally causing an overlap that
89 * intersects our test clip rectangle.
91 * w-d-s wins very rarely though, so the race is easy to miss. You can
92 * make it happen by putting a delay before the call to
93 * create_client_and_test_surface().
95 * The weston_test_move_pointer() below makes the race irrelevant, as
96 * the cursor won't overlap with anything we care about.
99 /* Move the pointer away from the screenshot area. */
100 weston_test_move_pointer(client->test->weston_test, 0, 1, 0, 0, 0);
102 buf = create_shm_buffer_a8r8g8b8(client, 100, 100);
103 draw_stuff(buf->image);
104 wl_surface_attach(surface, buf->proxy, 0, 0);
105 wl_surface_damage(surface, 0, 0, 100, 100);
106 wl_surface_commit(surface);
108 /* Take a snapshot. Result will be in screenshot->wl_buffer. */
109 printf("Taking a screenshot\n");
110 screenshot = capture_screenshot_of_output(client);
113 /* Load good reference image */
114 fname = screenshot_reference_filename("internal-screenshot-good", 0);
115 printf("Loading good reference image %s\n", fname);
116 reference_good = load_image_from_png(fname);
117 assert(reference_good);
119 /* Load bad reference image */
120 fname = screenshot_reference_filename("internal-screenshot-bad", 0);
121 printf("Loading bad reference image %s\n", fname);
122 reference_bad = load_image_from_png(fname);
123 assert(reference_bad);
125 /* Test check_images_match() without a clip.
126 * We expect this to fail since we use a bad reference image
128 match = check_images_match(screenshot->image, reference_bad, NULL);
129 printf("Screenshot %s reference image\n", match? "equal to" : "different from");
131 pixman_image_unref(reference_bad);
133 /* Test check_images_match() with clip.
134 * Alpha-blending and other effects can cause irrelevant discrepancies, so look only
135 * at a small portion of the solid-colored background
141 printf("Clip: %d,%d %d x %d\n", clip.x, clip.y, clip.width, clip.height);
142 match = check_images_match(screenshot->image, reference_good, &clip);
143 printf("Screenshot %s reference image in clipped area\n", match? "matches" : "doesn't match");
145 diffimg = visualize_image_difference(screenshot->image, reference_good, &clip);
146 fname = screenshot_output_filename("internal-screenshot-error", 0);
147 write_image_as_png(diffimg, fname);
148 pixman_image_unref(diffimg);
150 pixman_image_unref(reference_good);
152 /* Test dumping of non-matching images */
153 if (!match || dump_all_images) {
154 fname = screenshot_output_filename("internal-screenshot", 0);
155 write_image_as_png(screenshot->image, fname);
158 buffer_destroy(screenshot);
160 printf("Test complete\n");