2 * Test program, which can detect problems with nearest neighbout scaling
3 * implementation. Also SRC and OVER opetations tested for 16bpp and 32bpp
6 * Just run it without any command line arguments, and it will report either
7 * "scaling test passed" - everything is ok
8 * "scaling test failed!" - there is some problem
10 * In the case of failure, finding the problem involves the following steps:
11 * 1. Get the reference 'scaling-test' binary. It makes sense to disable all
12 * the cpu specific optimizations in pixman and also configure it with
13 * '--disable-shared' option. Those who are paranoid can also tweak the
14 * sources to disable all fastpath functions. The resulting binary
15 * can be renamed to something like 'scaling-test.ref'.
16 * 2. Compile the buggy binary (also with the '--disable-shared' option).
17 * 3. Run 'ruby scaling-test-bisect.rb ./scaling-test.ref ./scaling-test'
18 * 4. Look at the information about failed case (destination buffer content
19 * will be shown) and try to figure out what is wrong. It is possible
20 * to use debugging print to stderr in pixman to get more information,
21 * this does not interfere with the testing script.
28 #define MAX_SRC_WIDTH 10
29 #define MAX_SRC_HEIGHT 10
30 #define MAX_DST_WIDTH 10
31 #define MAX_DST_HEIGHT 10
35 * Composite operation with pseudorandom images
38 test_composite (uint32_t initcrc,
43 pixman_image_t * src_img;
44 pixman_image_t * dst_img;
45 pixman_transform_t transform;
46 pixman_region16_t clip;
47 int src_width, src_height;
48 int dst_width, dst_height;
49 int src_stride, dst_stride;
55 int scale_x = 32768, scale_y = 32768;
65 src_bpp = (lcg_rand_n (2) == 0) ? 2 : 4;
66 dst_bpp = (lcg_rand_n (2) == 0) ? 2 : 4;
67 op = (lcg_rand_n (2) == 0) ? PIXMAN_OP_SRC : PIXMAN_OP_OVER;
69 src_width = lcg_rand_n (MAX_SRC_WIDTH) + 1;
70 src_height = lcg_rand_n (MAX_SRC_HEIGHT) + 1;
71 dst_width = lcg_rand_n (MAX_DST_WIDTH) + 1;
72 dst_height = lcg_rand_n (MAX_DST_HEIGHT) + 1;
73 src_stride = src_width * src_bpp + lcg_rand_n (MAX_STRIDE) * src_bpp;
74 dst_stride = dst_width * dst_bpp + lcg_rand_n (MAX_STRIDE) * dst_bpp;
82 src_x = -(src_width / 4) + lcg_rand_n (src_width * 3 / 2);
83 src_y = -(src_height / 4) + lcg_rand_n (src_height * 3 / 2);
84 dst_x = -(dst_width / 4) + lcg_rand_n (dst_width * 3 / 2);
85 dst_y = -(dst_height / 4) + lcg_rand_n (dst_height * 3 / 2);
86 w = lcg_rand_n (dst_width * 3 / 2 - dst_x);
87 h = lcg_rand_n (dst_height * 3 / 2 - dst_y);
89 srcbuf = (uint32_t *)malloc (src_stride * src_height);
90 dstbuf = (uint32_t *)malloc (dst_stride * dst_height);
92 for (i = 0; i < src_stride * src_height; i++)
93 *((uint8_t *)srcbuf + i) = lcg_rand_n (256);
95 for (i = 0; i < dst_stride * dst_height; i++)
96 *((uint8_t *)dstbuf + i) = lcg_rand_n (256);
98 src_fmt = src_bpp == 4 ? (lcg_rand_n (2) == 0 ?
99 PIXMAN_a8r8g8b8 : PIXMAN_x8r8g8b8) : PIXMAN_r5g6b5;
101 dst_fmt = dst_bpp == 4 ? (lcg_rand_n (2) == 0 ?
102 PIXMAN_a8r8g8b8 : PIXMAN_x8r8g8b8) : PIXMAN_r5g6b5;
104 src_img = pixman_image_create_bits (
105 src_fmt, src_width, src_height, srcbuf, src_stride);
107 dst_img = pixman_image_create_bits (
108 dst_fmt, dst_width, dst_height, dstbuf, dst_stride);
110 image_endian_swap (src_img, src_bpp * 8);
111 image_endian_swap (dst_img, dst_bpp * 8);
113 if (lcg_rand_n (8) > 0)
115 scale_x = 32768 + lcg_rand_n (65536);
116 scale_y = 32768 + lcg_rand_n (65536);
117 pixman_transform_init_scale (&transform, scale_x, scale_y);
118 pixman_image_set_transform (src_img, &transform);
121 switch (lcg_rand_n (4))
124 repeat = PIXMAN_REPEAT_NONE;
128 repeat = PIXMAN_REPEAT_NORMAL;
132 repeat = PIXMAN_REPEAT_PAD;
136 repeat = PIXMAN_REPEAT_REFLECT;
142 pixman_image_set_repeat (src_img, repeat);
145 pixman_image_set_filter (src_img, PIXMAN_FILTER_NEAREST, NULL, 0);
147 pixman_image_set_filter (src_img, PIXMAN_FILTER_BILINEAR, NULL, 0);
151 printf ("src_fmt=%08X, dst_fmt=%08X\n", src_fmt, dst_fmt);
152 printf ("op=%d, scale_x=%d, scale_y=%d, repeat=%d\n",
153 op, scale_x, scale_y, repeat);
154 printf ("src_width=%d, src_height=%d, dst_width=%d, dst_height=%d\n",
155 src_width, src_height, dst_width, dst_height);
156 printf ("src_x=%d, src_y=%d, dst_x=%d, dst_y=%d\n",
157 src_x, src_y, dst_x, dst_y);
158 printf ("w=%d, h=%d\n", w, h);
161 if (lcg_rand_n (8) == 0)
163 pixman_box16_t clip_boxes[2];
164 int n = lcg_rand_n (2) + 1;
166 for (i = 0; i < n; i++)
168 clip_boxes[i].x1 = lcg_rand_n (src_width);
169 clip_boxes[i].y1 = lcg_rand_n (src_height);
171 clip_boxes[i].x1 + lcg_rand_n (src_width - clip_boxes[i].x1);
173 clip_boxes[i].y1 + lcg_rand_n (src_height - clip_boxes[i].y1);
177 printf ("source clip box: [%d,%d-%d,%d]\n",
178 clip_boxes[i].x1, clip_boxes[i].y1,
179 clip_boxes[i].x2, clip_boxes[i].y2);
183 pixman_region_init_rects (&clip, clip_boxes, n);
184 pixman_image_set_clip_region (src_img, &clip);
185 pixman_image_set_source_clipping (src_img, 1);
186 pixman_region_fini (&clip);
189 if (lcg_rand_n (8) == 0)
191 pixman_box16_t clip_boxes[2];
192 int n = lcg_rand_n (2) + 1;
193 for (i = 0; i < n; i++)
195 clip_boxes[i].x1 = lcg_rand_n (dst_width);
196 clip_boxes[i].y1 = lcg_rand_n (dst_height);
198 clip_boxes[i].x1 + lcg_rand_n (dst_width - clip_boxes[i].x1);
200 clip_boxes[i].y1 + lcg_rand_n (dst_height - clip_boxes[i].y1);
204 printf ("destination clip box: [%d,%d-%d,%d]\n",
205 clip_boxes[i].x1, clip_boxes[i].y1,
206 clip_boxes[i].x2, clip_boxes[i].y2);
209 pixman_region_init_rects (&clip, clip_boxes, n);
210 pixman_image_set_clip_region (dst_img, &clip);
211 pixman_region_fini (&clip);
214 pixman_image_composite (op, src_img, NULL, dst_img,
215 src_x, src_y, 0, 0, dst_x, dst_y, w, h);
217 if (dst_fmt == PIXMAN_x8r8g8b8)
219 /* ignore unused part */
220 for (i = 0; i < dst_stride * dst_height / 4; i++)
221 dstbuf[i] &= 0xFFFFFF;
224 image_endian_swap (dst_img, dst_bpp * 8);
230 for (i = 0; i < dst_height; i++)
232 for (j = 0; j < dst_stride; j++)
233 printf ("%02X ", *((uint8_t *)dstbuf + i * dst_stride + j));
239 pixman_image_unref (src_img);
240 pixman_image_unref (dst_img);
242 crc32 = compute_crc32 (initcrc, dstbuf, dst_stride * dst_height);
249 main (int argc, char *argv[])
254 pixman_disable_out_of_bounds_workaround ();
259 if (n == 0) n = 3000000;
263 crc = test_composite (0, -n, 1);
264 printf ("crc32=%08X\n", crc);
268 for (i = 1; i <= n; i++)
269 crc = test_composite (crc, i, 0);
271 printf ("crc32=%08X\n", crc);
275 /* predefined value for running with all the fastpath functions disabled */
276 /* it needs to be updated every time changes are introduced to this program! */
278 if (crc == 0x2168ACD1)
280 printf ("scaling test passed\n");
284 printf ("scaling test failed!\n");