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/*
* 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 <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include "utils.h"
#define MAX_SRC_WIDTH 10
#define MAX_SRC_HEIGHT 10
#define MAX_DST_WIDTH 10
#define MAX_DST_HEIGHT 10
#define MAX_STRIDE 4
/*
* Composite operation with pseudorandom images
*/
uint32_t
test_composite (int testnum,
int verbose)
{
int i;
pixman_image_t * src_img;
pixman_image_t * dst_img;
pixman_transform_t transform;
pixman_region16_t clip;
int src_width, src_height;
int dst_width, dst_height;
int src_stride, dst_stride;
int src_x, src_y;
int dst_x, dst_y;
int src_bpp;
int dst_bpp;
int w, h;
int scale_x = 32768, scale_y = 32768;
int op;
int repeat = 0;
int src_fmt, dst_fmt;
uint32_t * srcbuf;
uint32_t * dstbuf;
uint32_t crc32;
lcg_srand (testnum);
src_bpp = (lcg_rand_n (2) == 0) ? 2 : 4;
dst_bpp = (lcg_rand_n (2) == 0) ? 2 : 4;
op = (lcg_rand_n (2) == 0) ? PIXMAN_OP_SRC : PIXMAN_OP_OVER;
src_width = lcg_rand_n (MAX_SRC_WIDTH) + 1;
src_height = lcg_rand_n (MAX_SRC_HEIGHT) + 1;
dst_width = lcg_rand_n (MAX_DST_WIDTH) + 1;
dst_height = lcg_rand_n (MAX_DST_HEIGHT) + 1;
src_stride = src_width * src_bpp + lcg_rand_n (MAX_STRIDE) * src_bpp;
dst_stride = dst_width * dst_bpp + lcg_rand_n (MAX_STRIDE) * dst_bpp;
if (src_stride & 3)
src_stride += 2;
if (dst_stride & 3)
dst_stride += 2;
src_x = -(src_width / 4) + lcg_rand_n (src_width * 3 / 2);
src_y = -(src_height / 4) + lcg_rand_n (src_height * 3 / 2);
dst_x = -(dst_width / 4) + lcg_rand_n (dst_width * 3 / 2);
dst_y = -(dst_height / 4) + lcg_rand_n (dst_height * 3 / 2);
w = lcg_rand_n (dst_width * 3 / 2 - dst_x);
h = lcg_rand_n (dst_height * 3 / 2 - dst_y);
srcbuf = (uint32_t *)malloc (src_stride * src_height);
dstbuf = (uint32_t *)malloc (dst_stride * dst_height);
for (i = 0; i < src_stride * src_height; i++)
*((uint8_t *)srcbuf + i) = lcg_rand_n (256);
for (i = 0; i < dst_stride * dst_height; i++)
*((uint8_t *)dstbuf + i) = lcg_rand_n (256);
src_fmt = src_bpp == 4 ? (lcg_rand_n (2) == 0 ?
PIXMAN_a8r8g8b8 : PIXMAN_x8r8g8b8) : PIXMAN_r5g6b5;
dst_fmt = dst_bpp == 4 ? (lcg_rand_n (2) == 0 ?
PIXMAN_a8r8g8b8 : PIXMAN_x8r8g8b8) : PIXMAN_r5g6b5;
src_img = pixman_image_create_bits (
src_fmt, src_width, src_height, srcbuf, src_stride);
dst_img = pixman_image_create_bits (
dst_fmt, dst_width, dst_height, dstbuf, dst_stride);
image_endian_swap (src_img, src_bpp * 8);
image_endian_swap (dst_img, dst_bpp * 8);
if (lcg_rand_n (8) > 0)
{
scale_x = 32768 + lcg_rand_n (65536);
scale_y = 32768 + lcg_rand_n (65536);
pixman_transform_init_scale (&transform, scale_x, scale_y);
pixman_image_set_transform (src_img, &transform);
}
switch (lcg_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 (lcg_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 (verbose)
{
printf ("src_fmt=%08X, dst_fmt=%08X\n", src_fmt, dst_fmt);
printf ("op=%d, scale_x=%d, scale_y=%d, repeat=%d\n",
op, scale_x, scale_y, repeat);
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 (lcg_rand_n (8) == 0)
{
pixman_box16_t clip_boxes[2];
int n = lcg_rand_n (2) + 1;
for (i = 0; i < n; i++)
{
clip_boxes[i].x1 = lcg_rand_n (src_width);
clip_boxes[i].y1 = lcg_rand_n (src_height);
clip_boxes[i].x2 =
clip_boxes[i].x1 + lcg_rand_n (src_width - clip_boxes[i].x1);
clip_boxes[i].y2 =
clip_boxes[i].y1 + lcg_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 (lcg_rand_n (8) == 0)
{
pixman_box16_t clip_boxes[2];
int n = lcg_rand_n (2) + 1;
for (i = 0; i < n; i++)
{
clip_boxes[i].x1 = lcg_rand_n (dst_width);
clip_boxes[i].y1 = lcg_rand_n (dst_height);
clip_boxes[i].x2 =
clip_boxes[i].x1 + lcg_rand_n (dst_width - clip_boxes[i].x1);
clip_boxes[i].y2 =
clip_boxes[i].y1 + lcg_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);
}
pixman_image_composite (op, src_img, NULL, dst_img,
src_x, src_y, 0, 0, dst_x, dst_y, w, h);
if (dst_fmt == PIXMAN_x8r8g8b8)
{
/* ignore unused part */
for (i = 0; i < dst_stride * dst_height / 4; i++)
dstbuf[i] &= 0xFFFFFF;
}
image_endian_swap (dst_img, dst_bpp * 8);
if (verbose)
{
int j;
for (i = 0; i < dst_height; i++)
{
for (j = 0; j < dst_stride; j++)
printf ("%02X ", *((uint8_t *)dstbuf + i * dst_stride + j));
printf ("\n");
}
}
pixman_image_unref (src_img);
pixman_image_unref (dst_img);
crc32 = compute_crc32 (0, dstbuf, dst_stride * dst_height);
free (srcbuf);
free (dstbuf);
return crc32;
}
int
main (int argc, const char *argv[])
{
pixman_disable_out_of_bounds_workaround ();
return fuzzer_test_main("scaling", 3000000, 0x7833766A,
test_composite, argc, argv);
}
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