#include <stdio.h>

#include <stdlib.h>

#include "pixman.h"

#include "gtk-utils.h"

int

main (int argc, char **argv)

{

#define WIDTH 400

#define HEIGHT 400

#define TILE_SIZE 25

    pixman_image_t *checkerboard;

    pixman_image_t *destination;

#define D2F(d) (pixman_double_to_fixed(d))

    pixman_transform_t trans = { {

	    { D2F (-1.96830), D2F (-1.82250), D2F (512.12250)},

	    { D2F (0.00000), D2F (-7.29000), D2F (1458.00000)},

	    { D2F (0.00000), D2F (-0.00911), D2F (0.59231)},

	}};

    int i, j;

    checkerboard = pixman_image_create_bits (PIXMAN_a8r8g8b8,

					     WIDTH, HEIGHT,

					     NULL, 0);

    destination = pixman_image_create_bits (PIXMAN_a8r8g8b8,

					    WIDTH, HEIGHT,

					    NULL, 0);

    for (i = 0; i < HEIGHT / TILE_SIZE; ++i)

    {

	for (j = 0; j < WIDTH / TILE_SIZE; ++j)

	{

	    double u = (double)(j + 1) / (WIDTH / TILE_SIZE);

	    double v = (double)(i + 1) / (HEIGHT / TILE_SIZE);

	    pixman_color_t black = { 0, 0, 0, 0xffff };

	    pixman_color_t white = {

		v * 0xffff,

		u * 0xffff,

		(1 - (double)u) * 0xffff,

		0xffff };

	    pixman_color_t *c;

	    pixman_image_t *fill;

	    if ((j & 1) != (i & 1))

		c = &black;

	    else

		c = &white;

	    fill = pixman_image_create_solid_fill (c);

	    pixman_image_composite (PIXMAN_OP_SRC, fill, NULL, checkerboard,

				    0, 0, 0, 0, j * TILE_SIZE, i * TILE_SIZE,

				    TILE_SIZE, TILE_SIZE);

	}

    }

    pixman_image_set_transform (checkerboard, &trans);

    pixman_image_set_filter (checkerboard, PIXMAN_FILTER_BEST, NULL, 0);

    pixman_image_set_repeat (checkerboard, PIXMAN_REPEAT_NONE);

    pixman_image_composite (PIXMAN_OP_SRC,

			    checkerboard, NULL, destination,

			    0, 0, 0, 0, 0, 0,

			    WIDTH, HEIGHT);

    show_image (destination);

    return 0;

}