--- /dev/null
+/*
+ * Test program, which can detect some problems with nearest neighbour
+ * and bilinear scaling in pixman. Testing is done by running lots
+ * of random SRC and OVER compositing operations a8r8g8b8, x8a8r8g8b8
+ * and r5g6b5 color formats.
+ *
+ * Script 'fuzzer-find-diff.pl' can be used to narrow down the problem in
+ * the case of test failure.
+ */
+#include <stdlib.h>
+#include <stdio.h>
+#include "utils.h"
+
+#define MAX_SRC_WIDTH 48
+#define MAX_SRC_HEIGHT 8
+#define MAX_DST_WIDTH 48
+#define MAX_DST_HEIGHT 8
+#define MAX_STRIDE 4
+
+/*
+ * Composite operation with pseudorandom images
+ */
+
+static pixman_format_code_t
+get_format (int bpp)
+{
+ if (bpp == 4)
+ {
+ switch (prng_rand_n (4))
+ {
+ default:
+ case 0:
+ return PIXMAN_a8r8g8b8;
+ case 1:
+ return PIXMAN_x8r8g8b8;
+ case 2:
+ return PIXMAN_a8b8g8r8;
+ case 3:
+ return PIXMAN_x8b8g8r8;
+ }
+ }
+ else
+ {
+ return PIXMAN_r5g6b5;
+ }
+}
+
+uint32_t
+test_composite (int testnum,
+ int verbose)
+{
+ int i;
+ pixman_image_t * src_img;
+ pixman_image_t * mask_img;
+ pixman_image_t * dst_img;
+ pixman_transform_t transform;
+ pixman_region16_t clip;
+ int src_width, src_height;
+ int mask_width, mask_height;
+ int dst_width, dst_height;
+ int src_stride, mask_stride, dst_stride;
+ int src_x, src_y;
+ int mask_x, mask_y;
+ int dst_x, dst_y;
+ int src_bpp;
+ int mask_bpp = 1;
+ int dst_bpp;
+ int w, h;
+ pixman_fixed_t scale_x = 65536, scale_y = 65536;
+ pixman_fixed_t translate_x = 0, translate_y = 0;
+ pixman_fixed_t mask_scale_x = 65536, mask_scale_y = 65536;
+ pixman_fixed_t mask_translate_x = 0, mask_translate_y = 0;
+ pixman_op_t op;
+ pixman_repeat_t repeat = PIXMAN_REPEAT_NONE;
+ pixman_repeat_t mask_repeat = PIXMAN_REPEAT_NONE;
+ pixman_format_code_t src_fmt, dst_fmt;
+ uint32_t * srcbuf;
+ uint32_t * dstbuf;
+ uint32_t * maskbuf;
+ uint32_t crc32;
+ FLOAT_REGS_CORRUPTION_DETECTOR_START ();
+
+ prng_srand (testnum);
+
+ src_bpp = (prng_rand_n (2) == 0) ? 2 : 4;
+ dst_bpp = (prng_rand_n (2) == 0) ? 2 : 4;
+ switch (prng_rand_n (3))
+ {
+ case 0:
+ op = PIXMAN_OP_SRC;
+ break;
+ case 1:
+ op = PIXMAN_OP_OVER;
+ break;
+ default:
+ op = PIXMAN_OP_ADD;
+ break;
+ }
+
+ src_width = prng_rand_n (MAX_SRC_WIDTH) + 1;
+ src_height = prng_rand_n (MAX_SRC_HEIGHT) + 1;
+
+ if (prng_rand_n (2))
+ {
+ mask_width = prng_rand_n (MAX_SRC_WIDTH) + 1;
+ mask_height = prng_rand_n (MAX_SRC_HEIGHT) + 1;
+ }
+ else
+ {
+ mask_width = mask_height = 1;
+ }
+
+ dst_width = prng_rand_n (MAX_DST_WIDTH) + 1;
+ dst_height = prng_rand_n (MAX_DST_HEIGHT) + 1;
+ src_stride = src_width * src_bpp + prng_rand_n (MAX_STRIDE) * src_bpp;
+ mask_stride = mask_width * mask_bpp + prng_rand_n (MAX_STRIDE) * mask_bpp;
+ dst_stride = dst_width * dst_bpp + prng_rand_n (MAX_STRIDE) * dst_bpp;
+
+ if (src_stride & 3)
+ src_stride += 2;
+
+ if (mask_stride & 1)
+ mask_stride += 1;
+ if (mask_stride & 2)
+ mask_stride += 2;
+
+ if (dst_stride & 3)
+ dst_stride += 2;
+
+ src_x = -(src_width / 4) + prng_rand_n (src_width * 3 / 2);
+ src_y = -(src_height / 4) + prng_rand_n (src_height * 3 / 2);
+ mask_x = -(mask_width / 4) + prng_rand_n (mask_width * 3 / 2);
+ mask_y = -(mask_height / 4) + prng_rand_n (mask_height * 3 / 2);
+ dst_x = -(dst_width / 4) + prng_rand_n (dst_width * 3 / 2);
+ dst_y = -(dst_height / 4) + prng_rand_n (dst_height * 3 / 2);
+ w = prng_rand_n (dst_width * 3 / 2 - dst_x);
+ h = prng_rand_n (dst_height * 3 / 2 - dst_y);
+
+ srcbuf = (uint32_t *)malloc (src_stride * src_height);
+ maskbuf = (uint32_t *)malloc (mask_stride * mask_height);
+ dstbuf = (uint32_t *)malloc (dst_stride * dst_height);
+
+ prng_randmemset (srcbuf, src_stride * src_height, 0);
+ prng_randmemset (maskbuf, mask_stride * mask_height, 0);
+ prng_randmemset (dstbuf, dst_stride * dst_height, 0);
+
+ src_fmt = get_format (src_bpp);
+ dst_fmt = get_format (dst_bpp);
+
+ if (prng_rand_n (2))
+ {
+ srcbuf += (src_stride / 4) * (src_height - 1);
+ src_stride = - src_stride;
+ }
+
+ if (prng_rand_n (2))
+ {
+ maskbuf += (mask_stride / 4) * (mask_height - 1);
+ mask_stride = - mask_stride;
+ }
+
+ if (prng_rand_n (2))
+ {
+ dstbuf += (dst_stride / 4) * (dst_height - 1);
+ dst_stride = - dst_stride;
+ }
+
+ src_img = pixman_image_create_bits (
+ src_fmt, src_width, src_height, srcbuf, src_stride);
+
+ mask_img = pixman_image_create_bits (
+ PIXMAN_a8, mask_width, mask_height, maskbuf, mask_stride);
+
+ dst_img = pixman_image_create_bits (
+ dst_fmt, dst_width, dst_height, dstbuf, dst_stride);
+
+ image_endian_swap (src_img);
+ image_endian_swap (dst_img);
+
+ if (prng_rand_n (4) > 0)
+ {
+ scale_x = -32768 * 3 + prng_rand_n (65536 * 5);
+ scale_y = -32768 * 3 + prng_rand_n (65536 * 5);
+ translate_x = prng_rand_n (65536);
+ translate_y = prng_rand_n (65536);
+ pixman_transform_init_scale (&transform, scale_x, scale_y);
+ pixman_transform_translate (&transform, NULL, translate_x, translate_y);
+ pixman_image_set_transform (src_img, &transform);
+ }
+
+ if (prng_rand_n (2) > 0)
+ {
+ mask_scale_x = -32768 * 3 + prng_rand_n (65536 * 5);
+ mask_scale_y = -32768 * 3 + prng_rand_n (65536 * 5);
+ mask_translate_x = prng_rand_n (65536);
+ mask_translate_y = prng_rand_n (65536);
+ pixman_transform_init_scale (&transform, mask_scale_x, mask_scale_y);
+ pixman_transform_translate (&transform, NULL, mask_translate_x, mask_translate_y);
+ pixman_image_set_transform (mask_img, &transform);
+ }
+
+ switch (prng_rand_n (4))
+ {
+ case 0:
+ mask_repeat = PIXMAN_REPEAT_NONE;
+ break;
+
+ case 1:
+ mask_repeat = PIXMAN_REPEAT_NORMAL;
+ break;
+
+ case 2:
+ mask_repeat = PIXMAN_REPEAT_PAD;
+ break;
+
+ case 3:
+ mask_repeat = PIXMAN_REPEAT_REFLECT;
+ break;
+
+ default:
+ break;
+ }
+ pixman_image_set_repeat (mask_img, mask_repeat);
+
+ switch (prng_rand_n (4))
+ {
+ case 0:
+ repeat = PIXMAN_REPEAT_NONE;
+ break;
+
+ case 1:
+ repeat = PIXMAN_REPEAT_NORMAL;
+ break;
+
+ case 2:
+ repeat = PIXMAN_REPEAT_PAD;
+ break;
+
+ case 3:
+ repeat = PIXMAN_REPEAT_REFLECT;
+ break;
+
+ default:
+ break;
+ }
+ pixman_image_set_repeat (src_img, repeat);
+
+ if (prng_rand_n (2))
+ pixman_image_set_filter (src_img, PIXMAN_FILTER_NEAREST, NULL, 0);
+ else
+ pixman_image_set_filter (src_img, PIXMAN_FILTER_BILINEAR, NULL, 0);
+
+ if (prng_rand_n (2))
+ pixman_image_set_filter (mask_img, PIXMAN_FILTER_NEAREST, NULL, 0);
+ else
+ pixman_image_set_filter (mask_img, PIXMAN_FILTER_BILINEAR, NULL, 0);
+
+ if (verbose)
+ {
+ printf ("src_fmt=%s, dst_fmt=%s\n",
+ format_name (src_fmt), format_name (dst_fmt));
+ printf ("op=%s, scale_x=%d, scale_y=%d, repeat=%d\n",
+ operator_name (op), scale_x, scale_y, repeat);
+ printf ("translate_x=%d, translate_y=%d\n",
+ translate_x, translate_y);
+ printf ("src_width=%d, src_height=%d, dst_width=%d, dst_height=%d\n",
+ src_width, src_height, dst_width, dst_height);
+ printf ("src_x=%d, src_y=%d, dst_x=%d, dst_y=%d\n",
+ src_x, src_y, dst_x, dst_y);
+ printf ("w=%d, h=%d\n", w, h);
+ }
+
+ if (prng_rand_n (8) == 0)
+ {
+ pixman_box16_t clip_boxes[2];
+ int n = prng_rand_n (2) + 1;
+
+ for (i = 0; i < n; i++)
+ {
+ clip_boxes[i].x1 = prng_rand_n (src_width);
+ clip_boxes[i].y1 = prng_rand_n (src_height);
+ clip_boxes[i].x2 =
+ clip_boxes[i].x1 + prng_rand_n (src_width - clip_boxes[i].x1);
+ clip_boxes[i].y2 =
+ clip_boxes[i].y1 + prng_rand_n (src_height - clip_boxes[i].y1);
+
+ if (verbose)
+ {
+ printf ("source clip box: [%d,%d-%d,%d]\n",
+ clip_boxes[i].x1, clip_boxes[i].y1,
+ clip_boxes[i].x2, clip_boxes[i].y2);
+ }
+ }
+
+ pixman_region_init_rects (&clip, clip_boxes, n);
+ pixman_image_set_clip_region (src_img, &clip);
+ pixman_image_set_source_clipping (src_img, 1);
+ pixman_region_fini (&clip);
+ }
+
+ if (prng_rand_n (8) == 0)
+ {
+ pixman_box16_t clip_boxes[2];
+ int n = prng_rand_n (2) + 1;
+
+ for (i = 0; i < n; i++)
+ {
+ clip_boxes[i].x1 = prng_rand_n (mask_width);
+ clip_boxes[i].y1 = prng_rand_n (mask_height);
+ clip_boxes[i].x2 =
+ clip_boxes[i].x1 + prng_rand_n (mask_width - clip_boxes[i].x1);
+ clip_boxes[i].y2 =
+ clip_boxes[i].y1 + prng_rand_n (mask_height - clip_boxes[i].y1);
+
+ if (verbose)
+ {
+ printf ("mask clip box: [%d,%d-%d,%d]\n",
+ clip_boxes[i].x1, clip_boxes[i].y1,
+ clip_boxes[i].x2, clip_boxes[i].y2);
+ }
+ }
+
+ pixman_region_init_rects (&clip, clip_boxes, n);
+ pixman_image_set_clip_region (mask_img, &clip);
+ pixman_image_set_source_clipping (mask_img, 1);
+ pixman_region_fini (&clip);
+ }
+
+ if (prng_rand_n (8) == 0)
+ {
+ pixman_box16_t clip_boxes[2];
+ int n = prng_rand_n (2) + 1;
+ for (i = 0; i < n; i++)
+ {
+ clip_boxes[i].x1 = prng_rand_n (dst_width);
+ clip_boxes[i].y1 = prng_rand_n (dst_height);
+ clip_boxes[i].x2 =
+ clip_boxes[i].x1 + prng_rand_n (dst_width - clip_boxes[i].x1);
+ clip_boxes[i].y2 =
+ clip_boxes[i].y1 + prng_rand_n (dst_height - clip_boxes[i].y1);
+
+ if (verbose)
+ {
+ printf ("destination clip box: [%d,%d-%d,%d]\n",
+ clip_boxes[i].x1, clip_boxes[i].y1,
+ clip_boxes[i].x2, clip_boxes[i].y2);
+ }
+ }
+ pixman_region_init_rects (&clip, clip_boxes, n);
+ pixman_image_set_clip_region (dst_img, &clip);
+ pixman_region_fini (&clip);
+ }
+
+ if (prng_rand_n (2) == 0)
+ pixman_image_composite (op, src_img, NULL, dst_img,
+ src_x, src_y, 0, 0, dst_x, dst_y, w, h);
+ else
+ pixman_image_composite (op, src_img, mask_img, dst_img,
+ src_x, src_y, mask_x, mask_y, dst_x, dst_y, w, h);
+
+ crc32 = compute_crc32_for_image (0, dst_img);
+
+ if (verbose)
+ print_image (dst_img);
+
+ pixman_image_unref (src_img);
+ pixman_image_unref (mask_img);
+ pixman_image_unref (dst_img);
+
+ if (src_stride < 0)
+ srcbuf += (src_stride / 4) * (src_height - 1);
+
+ if (mask_stride < 0)
+ maskbuf += (mask_stride / 4) * (mask_height - 1);
+
+ if (dst_stride < 0)
+ dstbuf += (dst_stride / 4) * (dst_height - 1);
+
+ free (srcbuf);
+ free (maskbuf);
+ free (dstbuf);
+
+ FLOAT_REGS_CORRUPTION_DETECTOR_FINISH ();
+ return crc32;
+}
+
+#if BILINEAR_INTERPOLATION_BITS == 7
+#define CHECKSUM 0x92E0F068
+#elif BILINEAR_INTERPOLATION_BITS == 4
+#define CHECKSUM 0x8EFFA1E5
+#else
+#define CHECKSUM 0x00000000
+#endif
+
+int
+main (int argc, const char *argv[])
+{
+ pixman_disable_out_of_bounds_workaround ();
+
+ return fuzzer_test_main("scaling", 8000000, CHECKSUM,
+ test_composite, argc, argv);
+}
Code Review / kvmfornfv.git / blobdiff