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#include <stdlib.h>
#include "utils.h"
#define SOURCE_WIDTH 320
#define SOURCE_HEIGHT 240
static pixman_image_t *
make_source (void)
{
size_t n_bytes = (SOURCE_WIDTH + 2) * (SOURCE_HEIGHT + 2) * 4;
uint32_t *data = malloc (n_bytes);
pixman_image_t *source;
prng_randmemset (data, n_bytes, 0);
source = pixman_image_create_bits (
PIXMAN_a8r8g8b8, SOURCE_WIDTH + 2, SOURCE_HEIGHT + 2,
data,
(SOURCE_WIDTH + 2) * 4);
pixman_image_set_filter (source, PIXMAN_FILTER_BILINEAR, NULL, 0);
return source;
}
int
main ()
{
double scale;
pixman_image_t *src;
prng_srand (23874);
src = make_source ();
printf ("# %-6s %-22s %-14s %-12s\n",
"ratio",
"resolutions",
"time / ms",
"time per pixel / ns");
for (scale = 0.1; scale < 10.005; scale += 0.01)
{
int dest_width = SOURCE_WIDTH * scale + 0.5;
int dest_height = SOURCE_HEIGHT * scale + 0.5;
pixman_fixed_t s = (1 / scale) * 65536.0 + 0.5;
pixman_transform_t transform;
pixman_image_t *dest;
double t1, t2;
pixman_transform_init_scale (&transform, s, s);
pixman_image_set_transform (src, &transform);
dest = pixman_image_create_bits (
PIXMAN_a8r8g8b8, dest_width, dest_height, NULL, -1);
t1 = gettime();
pixman_image_composite (
PIXMAN_OP_OVER, src, NULL, dest,
scale, scale, 0, 0, 0, 0, dest_width, dest_height);
t2 = gettime();
printf ("%6.2f : %4dx%-4d => %4dx%-4d : %12.4f : %12.4f\n",
scale, SOURCE_WIDTH, SOURCE_HEIGHT, dest_width, dest_height,
(t2 - t1) * 1000, ((t2 - t1) / (dest_width * dest_height)) * 1000000000);
pixman_image_unref (dest);
}
return 0;
}
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