2 * Test program, which can detect some problems with affine transformations
3 * in pixman. Testing is done by running lots of random SRC and OVER
4 * compositing operations a8r8g8b8, x8a8r8g8b8, r5g6b5 and a8 color formats
5 * with random scaled, rotated and translated transforms.
7 * Script 'fuzzer-find-diff.pl' can be used to narrow down the problem in
8 * the case of test failure.
15 #define MAX_SRC_WIDTH 16
16 #define MAX_SRC_HEIGHT 16
17 #define MAX_DST_WIDTH 16
18 #define MAX_DST_HEIGHT 16
22 * Composite operation with pseudorandom images
25 test_composite (int testnum,
29 pixman_image_t * src_img;
30 pixman_image_t * dst_img;
31 pixman_transform_t transform;
32 pixman_region16_t clip;
33 int src_width, src_height;
34 int dst_width, dst_height;
35 int src_stride, dst_stride;
41 pixman_fixed_t scale_x = 65536, scale_y = 65536;
42 pixman_fixed_t translate_x = 0, translate_y = 0;
44 pixman_repeat_t repeat = PIXMAN_REPEAT_NONE;
45 pixman_format_code_t src_fmt, dst_fmt;
49 FLOAT_REGS_CORRUPTION_DETECTOR_START ();
53 src_bpp = (lcg_rand_n (2) == 0) ? 2 : 4;
54 dst_bpp = (lcg_rand_n (2) == 0) ? 2 : 4;
55 op = (lcg_rand_n (2) == 0) ? PIXMAN_OP_SRC : PIXMAN_OP_OVER;
57 src_width = lcg_rand_n (MAX_SRC_WIDTH) + 1;
58 src_height = lcg_rand_n (MAX_SRC_HEIGHT) + 1;
59 dst_width = lcg_rand_n (MAX_DST_WIDTH) + 1;
60 dst_height = lcg_rand_n (MAX_DST_HEIGHT) + 1;
61 src_stride = src_width * src_bpp + lcg_rand_n (MAX_STRIDE) * src_bpp;
62 dst_stride = dst_width * dst_bpp + lcg_rand_n (MAX_STRIDE) * dst_bpp;
70 src_x = -(src_width / 4) + lcg_rand_n (src_width * 3 / 2);
71 src_y = -(src_height / 4) + lcg_rand_n (src_height * 3 / 2);
72 dst_x = -(dst_width / 4) + lcg_rand_n (dst_width * 3 / 2);
73 dst_y = -(dst_height / 4) + lcg_rand_n (dst_height * 3 / 2);
74 w = lcg_rand_n (dst_width * 3 / 2 - dst_x);
75 h = lcg_rand_n (dst_height * 3 / 2 - dst_y);
77 srcbuf = (uint32_t *)malloc (src_stride * src_height);
78 dstbuf = (uint32_t *)malloc (dst_stride * dst_height);
80 for (i = 0; i < src_stride * src_height; i++)
81 *((uint8_t *)srcbuf + i) = lcg_rand_n (256);
83 for (i = 0; i < dst_stride * dst_height; i++)
84 *((uint8_t *)dstbuf + i) = lcg_rand_n (256);
86 src_fmt = src_bpp == 4 ? (lcg_rand_n (2) == 0 ?
87 PIXMAN_a8r8g8b8 : PIXMAN_x8r8g8b8) : PIXMAN_r5g6b5;
89 dst_fmt = dst_bpp == 4 ? (lcg_rand_n (2) == 0 ?
90 PIXMAN_a8r8g8b8 : PIXMAN_x8r8g8b8) : PIXMAN_r5g6b5;
92 src_img = pixman_image_create_bits (
93 src_fmt, src_width, src_height, srcbuf, src_stride);
95 dst_img = pixman_image_create_bits (
96 dst_fmt, dst_width, dst_height, dstbuf, dst_stride);
98 image_endian_swap (src_img);
99 image_endian_swap (dst_img);
101 pixman_transform_init_identity (&transform);
103 if (lcg_rand_n (3) > 0)
105 scale_x = -65536 * 3 + lcg_rand_N (65536 * 6);
107 scale_y = -65536 * 3 + lcg_rand_N (65536 * 6);
110 pixman_transform_init_scale (&transform, scale_x, scale_y);
112 if (lcg_rand_n (3) > 0)
114 translate_x = -65536 * 3 + lcg_rand_N (6 * 65536);
116 translate_y = -65536 * 3 + lcg_rand_N (6 * 65536);
118 translate_y = translate_x;
119 pixman_transform_translate (&transform, NULL, translate_x, translate_y);
122 if (lcg_rand_n (4) > 0)
124 int c, s, tx = 0, ty = 0;
125 switch (lcg_rand_n (4))
131 tx = pixman_int_to_fixed (MAX_SRC_HEIGHT);
137 tx = pixman_int_to_fixed (MAX_SRC_WIDTH);
138 ty = pixman_int_to_fixed (MAX_SRC_HEIGHT);
144 ty = pixman_int_to_fixed (MAX_SRC_WIDTH);
147 /* arbitrary rotation */
148 c = lcg_rand_N (2 * 65536) - 65536;
149 s = lcg_rand_N (2 * 65536) - 65536;
152 pixman_transform_rotate (&transform, NULL, c, s);
153 pixman_transform_translate (&transform, NULL, tx, ty);
156 if (lcg_rand_n (8) == 0)
158 /* Flip random bits */
159 int maxflipcount = 8;
160 while (maxflipcount--)
162 int i = lcg_rand_n (2);
163 int j = lcg_rand_n (3);
164 int bitnum = lcg_rand_n (32);
165 transform.matrix[i][j] ^= 1 << bitnum;
171 pixman_image_set_transform (src_img, &transform);
173 switch (lcg_rand_n (4))
176 repeat = PIXMAN_REPEAT_NONE;
180 repeat = PIXMAN_REPEAT_NORMAL;
184 repeat = PIXMAN_REPEAT_PAD;
188 repeat = PIXMAN_REPEAT_REFLECT;
194 pixman_image_set_repeat (src_img, repeat);
197 pixman_image_set_filter (src_img, PIXMAN_FILTER_NEAREST, NULL, 0);
199 pixman_image_set_filter (src_img, PIXMAN_FILTER_BILINEAR, NULL, 0);
203 printf ("src_fmt=%08X, dst_fmt=%08X\n", src_fmt, dst_fmt);
204 printf ("op=%d, scale_x=%d, scale_y=%d, repeat=%d\n",
205 op, scale_x, scale_y, repeat);
206 printf ("translate_x=%d, translate_y=%d\n",
207 translate_x, translate_y);
208 printf ("src_width=%d, src_height=%d, dst_width=%d, dst_height=%d\n",
209 src_width, src_height, dst_width, dst_height);
210 printf ("src_x=%d, src_y=%d, dst_x=%d, dst_y=%d\n",
211 src_x, src_y, dst_x, dst_y);
212 printf ("w=%d, h=%d\n", w, h);
215 if (lcg_rand_n (8) == 0)
217 pixman_box16_t clip_boxes[2];
218 int n = lcg_rand_n (2) + 1;
220 for (i = 0; i < n; i++)
222 clip_boxes[i].x1 = lcg_rand_n (src_width);
223 clip_boxes[i].y1 = lcg_rand_n (src_height);
225 clip_boxes[i].x1 + lcg_rand_n (src_width - clip_boxes[i].x1);
227 clip_boxes[i].y1 + lcg_rand_n (src_height - clip_boxes[i].y1);
231 printf ("source clip box: [%d,%d-%d,%d]\n",
232 clip_boxes[i].x1, clip_boxes[i].y1,
233 clip_boxes[i].x2, clip_boxes[i].y2);
237 pixman_region_init_rects (&clip, clip_boxes, n);
238 pixman_image_set_clip_region (src_img, &clip);
239 pixman_image_set_source_clipping (src_img, 1);
240 pixman_region_fini (&clip);
243 if (lcg_rand_n (8) == 0)
245 pixman_box16_t clip_boxes[2];
246 int n = lcg_rand_n (2) + 1;
247 for (i = 0; i < n; i++)
249 clip_boxes[i].x1 = lcg_rand_n (dst_width);
250 clip_boxes[i].y1 = lcg_rand_n (dst_height);
252 clip_boxes[i].x1 + lcg_rand_n (dst_width - clip_boxes[i].x1);
254 clip_boxes[i].y1 + lcg_rand_n (dst_height - clip_boxes[i].y1);
258 printf ("destination clip box: [%d,%d-%d,%d]\n",
259 clip_boxes[i].x1, clip_boxes[i].y1,
260 clip_boxes[i].x2, clip_boxes[i].y2);
263 pixman_region_init_rects (&clip, clip_boxes, n);
264 pixman_image_set_clip_region (dst_img, &clip);
265 pixman_region_fini (&clip);
268 pixman_image_composite (op, src_img, NULL, dst_img,
269 src_x, src_y, 0, 0, dst_x, dst_y, w, h);
271 if (dst_fmt == PIXMAN_x8r8g8b8)
273 /* ignore unused part */
274 for (i = 0; i < dst_stride * dst_height / 4; i++)
275 dstbuf[i] &= 0xFFFFFF;
278 image_endian_swap (dst_img);
284 for (i = 0; i < dst_height; i++)
286 for (j = 0; j < dst_stride; j++)
287 printf ("%02X ", *((uint8_t *)dstbuf + i * dst_stride + j));
293 pixman_image_unref (src_img);
294 pixman_image_unref (dst_img);
296 crc32 = compute_crc32 (0, dstbuf, dst_stride * dst_height);
300 FLOAT_REGS_CORRUPTION_DETECTOR_FINISH ();
305 main (int argc, const char *argv[])
307 pixman_disable_out_of_bounds_workaround ();
309 return fuzzer_test_main ("affine", 8000000, 0x1EF2175A,
310 test_composite, argc, argv);