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#include <stdio.h>
#include <stdlib.h>
#include "utils.h"
#define WIDTH 100
#define HEIGHT 100
static const pixman_format_code_t formats[] =
{
PIXMAN_a8r8g8b8,
PIXMAN_a2r10g10b10,
PIXMAN_a4r4g4b4,
PIXMAN_a8
};
static const pixman_format_code_t alpha_formats[] =
{
PIXMAN_null,
PIXMAN_a8,
PIXMAN_a2r10g10b10,
PIXMAN_a4r4g4b4
};
static const int origins[] =
{
0, 10, -100
};
static const char *
format_name (pixman_format_code_t format)
{
if (format == PIXMAN_a8)
return "a8";
else if (format == PIXMAN_a2r10g10b10)
return "a2r10g10b10";
else if (format == PIXMAN_a8r8g8b8)
return "a8r8g8b8";
else if (format == PIXMAN_a4r4g4b4)
return "a4r4g4b4";
else if (format == PIXMAN_null)
return "none";
else
assert (0);
return "<unknown - bug in alphamap.c>";
}
static void
on_destroy (pixman_image_t *image, void *data)
{
uint32_t *bits = pixman_image_get_data (image);
fence_free (bits);
}
static pixman_image_t *
make_image (pixman_format_code_t format)
{
uint32_t *bits;
uint8_t bpp = PIXMAN_FORMAT_BPP (format) / 8;
pixman_image_t *image;
bits = (uint32_t *)make_random_bytes (WIDTH * HEIGHT * bpp);
image = pixman_image_create_bits (format, WIDTH, HEIGHT, bits, WIDTH * bpp);
if (image && bits)
pixman_image_set_destroy_function (image, on_destroy, NULL);
return image;
}
static pixman_image_t *
create_image (pixman_format_code_t format, pixman_format_code_t alpha_format,
int alpha_origin_x, int alpha_origin_y)
{
pixman_image_t *image = make_image (format);
if (alpha_format != PIXMAN_null)
{
pixman_image_t *alpha = make_image (alpha_format);
pixman_image_set_alpha_map (image, alpha,
alpha_origin_x, alpha_origin_y);
}
return image;
}
static uint8_t
get_alpha (pixman_image_t *image, int x, int y, int orig_x, int orig_y)
{
uint8_t *bits;
uint8_t r;
if (image->common.alpha_map)
{
if (x - orig_x >= 0 && x - orig_x < WIDTH &&
y - orig_y >= 0 && y - orig_y < HEIGHT)
{
image = (pixman_image_t *)image->common.alpha_map;
x -= orig_x;
y -= orig_y;
}
else
{
return 0;
}
}
bits = (uint8_t *)image->bits.bits;
if (image->bits.format == PIXMAN_a8)
{
r = bits[y * WIDTH + x];
}
else if (image->bits.format == PIXMAN_a2r10g10b10)
{
r = ((uint32_t *)bits)[y * WIDTH + x] >> 30;
r |= r << 2;
r |= r << 4;
}
else if (image->bits.format == PIXMAN_a8r8g8b8)
{
r = ((uint32_t *)bits)[y * WIDTH + x] >> 24;
}
else if (image->bits.format == PIXMAN_a4r4g4b4)
{
r = ((uint16_t *)bits)[y * WIDTH + x] >> 12;
r |= r << 4;
}
else
{
assert (0);
}
return r;
}
#define ARRAY_LENGTH(A) ((int) (sizeof (A) / sizeof ((A) [0])))
static int
run_test (int s, int d, int sa, int da, int soff, int doff)
{
pixman_format_code_t sf = formats[s];
pixman_format_code_t df = formats[d];
pixman_format_code_t saf = alpha_formats[sa];
pixman_format_code_t daf = alpha_formats[da];
pixman_image_t *src, *dst, *orig_dst;
pixman_transform_t t1;
int j, k;
int n_alpha_bits;
soff = origins[soff];
doff = origins[doff];
n_alpha_bits = PIXMAN_FORMAT_A (df);
if (daf != PIXMAN_null)
n_alpha_bits = PIXMAN_FORMAT_A (daf);
src = create_image (sf, saf, soff, soff);
orig_dst = create_image (df, daf, doff, doff);
dst = create_image (df, daf, doff, doff);
/* Transformations on destinations should be ignored, so just set some
* random one.
*/
pixman_transform_init_identity (&t1);
pixman_transform_scale (&t1, NULL, pixman_int_to_fixed (100), pixman_int_to_fixed (11));
pixman_transform_rotate (&t1, NULL, pixman_double_to_fixed (0.5), pixman_double_to_fixed (0.11));
pixman_transform_translate (&t1, NULL, pixman_int_to_fixed (11), pixman_int_to_fixed (17));
#if 0
/* Unfortunately, this is actually broken at the moment, so we can't
* actually turn it on
*/
pixman_image_set_transform (dst, &t1);
#endif
pixman_image_composite (PIXMAN_OP_SRC, orig_dst, NULL, dst,
0, 0, 0, 0, 0, 0, WIDTH, HEIGHT);
pixman_image_composite (PIXMAN_OP_ADD, src, NULL, dst,
0, 0, 0, 0, 0, 0, WIDTH, HEIGHT);
for (j = MAX (doff, 0); j < MIN (HEIGHT, HEIGHT + doff); ++j)
{
for (k = MAX (doff, 0); k < MIN (WIDTH, WIDTH + doff); ++k)
{
uint8_t sa, da, oda, ref;
sa = get_alpha (src, k, j, soff, soff);
da = get_alpha (dst, k, j, doff, doff);
oda = get_alpha (orig_dst, k, j, doff, doff);
if (sa + oda > 255)
ref = 255;
else
ref = sa + oda;
if (da >> (8 - n_alpha_bits) != ref >> (8 - n_alpha_bits))
{
printf ("\nWrong alpha value at (%d, %d). Should be 0x%x; got 0x%x. Source was 0x%x, original dest was 0x%x\n",
k, j, ref, da, sa, oda);
printf ("src: %s, alpha: %s, origin %d %d\ndst: %s, alpha: %s, origin: %d %d\n\n",
format_name (sf),
format_name (saf),
soff, soff,
format_name (df),
format_name (daf),
doff, doff);
return 1;
}
}
}
pixman_image_unref (src);
pixman_image_unref (dst);
pixman_image_unref (orig_dst);
return 0;
}
int
main (int argc, char **argv)
{
int i, j, a, b, x, y;
for (i = 0; i < ARRAY_LENGTH (formats); ++i)
{
for (j = 0; j < ARRAY_LENGTH (formats); ++j)
{
for (a = 0; a < ARRAY_LENGTH (alpha_formats); ++a)
{
for (b = 0; b < ARRAY_LENGTH (alpha_formats); ++b)
{
for (x = 0; x < ARRAY_LENGTH (origins); ++x)
{
for (y = 0; y < ARRAY_LENGTH (origins); ++y)
{
if (run_test (i, j, a, b, x, y) != 0)
return 1;
}
}
}
}
}
}
return 0;
}
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