#include <stdlib.h>

#include "utils.h"

#define SOURCE_WIDTH 320

#define SOURCE_HEIGHT 240

#define TEST_REPEATS 3

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 i;

	int dest_width = SOURCE_WIDTH * scale + 0.5;

	int dest_height = SOURCE_HEIGHT * scale + 0.5;

	int dest_byte_stride = (dest_width * 4 + 15) & ~15;

	pixman_fixed_t s = (1 / scale) * 65536.0 + 0.5;

	pixman_transform_t transform;

	pixman_image_t *dest;

	double t1, t2, t = -1;

	uint32_t *dest_buf = aligned_malloc (16, dest_byte_stride * dest_height);

	memset (dest_buf, 0, dest_byte_stride * dest_height);

	pixman_transform_init_scale (&transform, s, s);

	pixman_image_set_transform (src, &transform);

	dest = pixman_image_create_bits (

	    PIXMAN_a8r8g8b8, dest_width, dest_height, dest_buf, dest_byte_stride);

	for (i = 0; i < TEST_REPEATS; i++)

	{

	    t1 = gettime();

	    pixman_image_composite (

		PIXMAN_OP_OVER, src, NULL, dest,

		scale, scale, 0, 0, 0, 0, dest_width, dest_height);

	    t2 = gettime();

	    if (t < 0 || t2 - t1 < t)

		t = t2 - t1;

	}

	printf ("%6.2f : %4dx%-4d => %4dx%-4d : %12.4f : %12.4f\n",

		scale, SOURCE_WIDTH, SOURCE_HEIGHT, dest_width, dest_height,

		t * 1000, (t / (dest_width * dest_height)) * 1000000000);

	pixman_image_unref (dest);

	free (dest_buf);

    }

    return 0;

}