/*
* 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);
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);
if (dst_fmt == PIXMAN_x8r8g8b8 || dst_fmt == PIXMAN_x8b8g8r8)
{
/* ignore unused part */
for (i = 0; i < dst_stride * dst_height / 4; i++)
dstbuf[i] &= 0xFFFFFF;
}
image_endian_swap (dst_img);
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 (mask_img);
pixman_image_unref (dst_img);
crc32 = compute_crc32 (0, dstbuf, dst_stride * dst_height);
free (srcbuf);
free (maskbuf);
free (dstbuf);
FLOAT_REGS_CORRUPTION_DETECTOR_FINISH ();
return crc32;
}
#if BILINEAR_INTERPOLATION_BITS == 8
#define CHECKSUM 0x9096E6B6
#elif BILINEAR_INTERPOLATION_BITS == 7
#define CHECKSUM 0xCE8EC6BA
#elif BILINEAR_INTERPOLATION_BITS == 4
#define CHECKSUM 0xAB1D39BE
#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);
}