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#include <stdio.h>
#include <stdlib.h>
#include <config.h>
#include "pixman-private.h"
#include "pixman.h"
#define FALSE 0
#define TRUE 1
/* Randomly decide between 32 and 16 bit
*
* Allocate bits with random width, stride and height
*
* Then make up some random offset (dx, dy)
*
* Then make an image with those values.
*
* Do this for both source and destination
*
* Composite them together using OVER.
*
* The bits in the source and the destination should have
* recognizable colors so that the result can be verified.
*
* Ie., walk the bits and verify that they have been composited.
*/
static int
get_rand (int bound)
{
return rand () % bound;
}
static pixman_image_t *
make_image (int width, int height, pixman_bool_t src, int *rx, int *ry)
{
pixman_format_code_t format;
pixman_image_t *image;
pixman_region32_t region;
uint8_t *bits;
int stride;
int bpp;
int dx, dy;
int i, j;
if (src)
format = PIXMAN_a8r8g8b8;
else
format = PIXMAN_r5g6b5;
bpp = PIXMAN_FORMAT_BPP (format) / 8;
stride = width + get_rand (width);
stride += (stride & 1); /* Make it an even number */
bits = malloc (height * stride * bpp);
for (j = 0; j < height; ++j)
{
for (i = 0; i < width; ++i)
{
uint8_t *pixel = bits + (stride * j + i) * bpp;
if (src)
*(uint32_t *)pixel = 0x7f00007f;
else
*(uint16_t *)pixel = 0xf100;
}
}
dx = dy = 0;
dx = get_rand (500);
dy = get_rand (500);
if (!src)
{
/* Now simulate the bogus X server translations */
bits -= (dy * stride + dx) * bpp;
}
image = pixman_image_create_bits (
format, width, height, (uint32_t *)bits, stride * bpp);
if (!src)
{
/* And add the bogus clip region */
pixman_region32_init_rect (®ion, dx, dy, dx + width, dy + height);
pixman_image_set_clip_region32 (image, ®ion);
}
pixman_image_set_source_clipping (image, TRUE);
if (src)
{
pixman_transform_t trans;
pixman_transform_init_identity (&trans);
pixman_transform_translate (&trans,
NULL,
- pixman_int_to_fixed (width / 2),
- pixman_int_to_fixed (height / 2));
pixman_transform_scale (&trans,
NULL,
pixman_double_to_fixed (0.5),
pixman_double_to_fixed (0.5));
pixman_transform_translate (&trans,
NULL,
pixman_int_to_fixed (width / 2),
pixman_int_to_fixed (height / 2));
pixman_image_set_transform (image, &trans);
pixman_image_set_filter (image, PIXMAN_FILTER_BILINEAR, NULL, 0);
pixman_image_set_repeat (image, PIXMAN_REPEAT_PAD);
}
if (!src)
{
*rx = dx;
*ry = dy;
}
else
{
*rx = *ry = 0;
}
return image;
}
int
main ()
{
pixman_image_t *src, *dest;
int src_x, src_y, dest_x, dest_y;
int i, j;
int width = get_rand (500);
int height = get_rand (500);
src = make_image (width, height, TRUE, &src_x, &src_y);
dest = make_image (width, height, FALSE, &dest_x, &dest_y);
pixman_image_composite (
PIXMAN_OP_OVER, src, NULL, dest,
src_x, src_y,
-1, -1,
dest_x, dest_y,
width, height);
for (i = 0; i < height; ++i)
{
for (j = 0; j < width; ++j)
{
uint8_t *bits = (uint8_t *)dest->bits.bits;
int bpp = PIXMAN_FORMAT_BPP (dest->bits.format) / 8;
int stride = dest->bits.rowstride * 4;
uint8_t *pixel =
bits + (i + dest_y) * stride + (j + dest_x) * bpp;
if (*(uint16_t *)pixel != 0x788f)
{
printf ("bad pixel %x\n", *(uint16_t *)pixel);
assert (*(uint16_t *)pixel == 0x788f);
}
}
}
return 0;
}
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