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* Test program, which can detect some problems with nearest neighbour
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* and bilinear scaling in pixman. Testing is done by running lots
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* of random SRC and OVER compositing operations a8r8g8b8, x8a8r8g8b8
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* and r5g6b5 color formats.
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* Script 'fuzzer-find-diff.pl' can be used to narrow down the problem in
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* the case of test failure.
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#define MAX_SRC_WIDTH 48
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#define MAX_SRC_HEIGHT 8
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#define MAX_DST_WIDTH 48
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#define MAX_DST_HEIGHT 8
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* Composite operation with pseudorandom images
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static pixman_format_code_t
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switch (prng_rand_n (4))
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return PIXMAN_a8r8g8b8;
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return PIXMAN_x8r8g8b8;
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return PIXMAN_a8b8g8r8;
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return PIXMAN_x8b8g8r8;
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test_composite (int testnum,
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pixman_image_t * src_img;
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pixman_image_t * mask_img;
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pixman_image_t * dst_img;
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pixman_transform_t transform;
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pixman_region16_t clip;
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int src_width, src_height;
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int mask_width, mask_height;
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int dst_width, dst_height;
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int src_stride, mask_stride, dst_stride;
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pixman_fixed_t scale_x = 65536, scale_y = 65536;
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pixman_fixed_t translate_x = 0, translate_y = 0;
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pixman_fixed_t mask_scale_x = 65536, mask_scale_y = 65536;
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pixman_fixed_t mask_translate_x = 0, mask_translate_y = 0;
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pixman_repeat_t repeat = PIXMAN_REPEAT_NONE;
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pixman_repeat_t mask_repeat = PIXMAN_REPEAT_NONE;
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pixman_format_code_t src_fmt, dst_fmt;
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FLOAT_REGS_CORRUPTION_DETECTOR_START ();
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src_bpp = (prng_rand_n (2) == 0) ? 2 : 4;
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dst_bpp = (prng_rand_n (2) == 0) ? 2 : 4;
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switch (prng_rand_n (3))
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src_width = prng_rand_n (MAX_SRC_WIDTH) + 1;
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src_height = prng_rand_n (MAX_SRC_HEIGHT) + 1;
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mask_width = prng_rand_n (MAX_SRC_WIDTH) + 1;
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mask_height = prng_rand_n (MAX_SRC_HEIGHT) + 1;
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mask_width = mask_height = 1;
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dst_width = prng_rand_n (MAX_DST_WIDTH) + 1;
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dst_height = prng_rand_n (MAX_DST_HEIGHT) + 1;
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src_stride = src_width * src_bpp + prng_rand_n (MAX_STRIDE) * src_bpp;
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mask_stride = mask_width * mask_bpp + prng_rand_n (MAX_STRIDE) * mask_bpp;
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dst_stride = dst_width * dst_bpp + prng_rand_n (MAX_STRIDE) * dst_bpp;
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src_x = -(src_width / 4) + prng_rand_n (src_width * 3 / 2);
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src_y = -(src_height / 4) + prng_rand_n (src_height * 3 / 2);
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mask_x = -(mask_width / 4) + prng_rand_n (mask_width * 3 / 2);
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mask_y = -(mask_height / 4) + prng_rand_n (mask_height * 3 / 2);
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dst_x = -(dst_width / 4) + prng_rand_n (dst_width * 3 / 2);
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dst_y = -(dst_height / 4) + prng_rand_n (dst_height * 3 / 2);
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w = prng_rand_n (dst_width * 3 / 2 - dst_x);
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h = prng_rand_n (dst_height * 3 / 2 - dst_y);
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srcbuf = (uint32_t *)malloc (src_stride * src_height);
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maskbuf = (uint32_t *)malloc (mask_stride * mask_height);
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dstbuf = (uint32_t *)malloc (dst_stride * dst_height);
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prng_randmemset (srcbuf, src_stride * src_height, 0);
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prng_randmemset (maskbuf, mask_stride * mask_height, 0);
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prng_randmemset (dstbuf, dst_stride * dst_height, 0);
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src_fmt = get_format (src_bpp);
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dst_fmt = get_format (dst_bpp);
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srcbuf += (src_stride / 4) * (src_height - 1);
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src_stride = - src_stride;
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maskbuf += (mask_stride / 4) * (mask_height - 1);
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mask_stride = - mask_stride;
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dstbuf += (dst_stride / 4) * (dst_height - 1);
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dst_stride = - dst_stride;
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src_img = pixman_image_create_bits (
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src_fmt, src_width, src_height, srcbuf, src_stride);
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mask_img = pixman_image_create_bits (
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PIXMAN_a8, mask_width, mask_height, maskbuf, mask_stride);
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dst_img = pixman_image_create_bits (
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dst_fmt, dst_width, dst_height, dstbuf, dst_stride);
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image_endian_swap (src_img);
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image_endian_swap (dst_img);
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if (prng_rand_n (4) > 0)
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scale_x = -32768 * 3 + prng_rand_n (65536 * 5);
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scale_y = -32768 * 3 + prng_rand_n (65536 * 5);
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translate_x = prng_rand_n (65536);
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translate_y = prng_rand_n (65536);
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pixman_transform_init_scale (&transform, scale_x, scale_y);
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pixman_transform_translate (&transform, NULL, translate_x, translate_y);
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pixman_image_set_transform (src_img, &transform);
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if (prng_rand_n (2) > 0)
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mask_scale_x = -32768 * 3 + prng_rand_n (65536 * 5);
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mask_scale_y = -32768 * 3 + prng_rand_n (65536 * 5);
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mask_translate_x = prng_rand_n (65536);
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mask_translate_y = prng_rand_n (65536);
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pixman_transform_init_scale (&transform, mask_scale_x, mask_scale_y);
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pixman_transform_translate (&transform, NULL, mask_translate_x, mask_translate_y);
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pixman_image_set_transform (mask_img, &transform);
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switch (prng_rand_n (4))
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mask_repeat = PIXMAN_REPEAT_NONE;
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mask_repeat = PIXMAN_REPEAT_NORMAL;
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mask_repeat = PIXMAN_REPEAT_PAD;
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mask_repeat = PIXMAN_REPEAT_REFLECT;
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pixman_image_set_repeat (mask_img, mask_repeat);
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switch (prng_rand_n (4))
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repeat = PIXMAN_REPEAT_NONE;
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repeat = PIXMAN_REPEAT_NORMAL;
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repeat = PIXMAN_REPEAT_PAD;
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repeat = PIXMAN_REPEAT_REFLECT;
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pixman_image_set_repeat (src_img, repeat);
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pixman_image_set_filter (src_img, PIXMAN_FILTER_NEAREST, NULL, 0);
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pixman_image_set_filter (src_img, PIXMAN_FILTER_BILINEAR, NULL, 0);
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pixman_image_set_filter (mask_img, PIXMAN_FILTER_NEAREST, NULL, 0);
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pixman_image_set_filter (mask_img, PIXMAN_FILTER_BILINEAR, NULL, 0);
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printf ("src_fmt=%s, dst_fmt=%s\n",
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format_name (src_fmt), format_name (dst_fmt));
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printf ("op=%s, scale_x=%d, scale_y=%d, repeat=%d\n",
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operator_name (op), scale_x, scale_y, repeat);
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printf ("translate_x=%d, translate_y=%d\n",
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translate_x, translate_y);
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printf ("src_width=%d, src_height=%d, dst_width=%d, dst_height=%d\n",
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src_width, src_height, dst_width, dst_height);
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printf ("src_x=%d, src_y=%d, dst_x=%d, dst_y=%d\n",
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src_x, src_y, dst_x, dst_y);
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printf ("w=%d, h=%d\n", w, h);
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if (prng_rand_n (8) == 0)
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pixman_box16_t clip_boxes[2];
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int n = prng_rand_n (2) + 1;
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for (i = 0; i < n; i++)
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clip_boxes[i].x1 = prng_rand_n (src_width);
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clip_boxes[i].y1 = prng_rand_n (src_height);
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clip_boxes[i].x1 + prng_rand_n (src_width - clip_boxes[i].x1);
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clip_boxes[i].y1 + prng_rand_n (src_height - clip_boxes[i].y1);
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printf ("source clip box: [%d,%d-%d,%d]\n",
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clip_boxes[i].x1, clip_boxes[i].y1,
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clip_boxes[i].x2, clip_boxes[i].y2);
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pixman_region_init_rects (&clip, clip_boxes, n);
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pixman_image_set_clip_region (src_img, &clip);
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pixman_image_set_source_clipping (src_img, 1);
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pixman_region_fini (&clip);
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if (prng_rand_n (8) == 0)
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pixman_box16_t clip_boxes[2];
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int n = prng_rand_n (2) + 1;
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for (i = 0; i < n; i++)
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clip_boxes[i].x1 = prng_rand_n (mask_width);
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clip_boxes[i].y1 = prng_rand_n (mask_height);
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clip_boxes[i].x1 + prng_rand_n (mask_width - clip_boxes[i].x1);
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clip_boxes[i].y1 + prng_rand_n (mask_height - clip_boxes[i].y1);
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printf ("mask clip box: [%d,%d-%d,%d]\n",
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clip_boxes[i].x1, clip_boxes[i].y1,
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clip_boxes[i].x2, clip_boxes[i].y2);
323
pixman_region_init_rects (&clip, clip_boxes, n);
324
pixman_image_set_clip_region (mask_img, &clip);
325
pixman_image_set_source_clipping (mask_img, 1);
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pixman_region_fini (&clip);
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if (prng_rand_n (8) == 0)
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pixman_box16_t clip_boxes[2];
332
int n = prng_rand_n (2) + 1;
333
for (i = 0; i < n; i++)
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clip_boxes[i].x1 = prng_rand_n (dst_width);
336
clip_boxes[i].y1 = prng_rand_n (dst_height);
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clip_boxes[i].x1 + prng_rand_n (dst_width - clip_boxes[i].x1);
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clip_boxes[i].y1 + prng_rand_n (dst_height - clip_boxes[i].y1);
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printf ("destination clip box: [%d,%d-%d,%d]\n",
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clip_boxes[i].x1, clip_boxes[i].y1,
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clip_boxes[i].x2, clip_boxes[i].y2);
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pixman_region_init_rects (&clip, clip_boxes, n);
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pixman_image_set_clip_region (dst_img, &clip);
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pixman_region_fini (&clip);
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if (prng_rand_n (2) == 0)
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pixman_image_composite (op, src_img, NULL, dst_img,
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src_x, src_y, 0, 0, dst_x, dst_y, w, h);
358
pixman_image_composite (op, src_img, mask_img, dst_img,
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src_x, src_y, mask_x, mask_y, dst_x, dst_y, w, h);
361
crc32 = compute_crc32_for_image (0, dst_img);
364
print_image (dst_img);
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pixman_image_unref (src_img);
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pixman_image_unref (mask_img);
368
pixman_image_unref (dst_img);
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srcbuf += (src_stride / 4) * (src_height - 1);
374
maskbuf += (mask_stride / 4) * (mask_height - 1);
377
dstbuf += (dst_stride / 4) * (dst_height - 1);
383
FLOAT_REGS_CORRUPTION_DETECTOR_FINISH ();
387
#if BILINEAR_INTERPOLATION_BITS == 7
388
#define CHECKSUM 0x92E0F068
389
#elif BILINEAR_INTERPOLATION_BITS == 4
390
#define CHECKSUM 0x8EFFA1E5
392
#define CHECKSUM 0x00000000
396
main (int argc, const char *argv[])
398
pixman_disable_out_of_bounds_workaround ();
400
return fuzzer_test_main("scaling", 8000000, CHECKSUM,
401
test_composite, argc, argv);