#include <assert.h>

#include <stdlib.h>

#include <stdio.h>

#include "utils.h"

int

main ()

{

    pixman_region32_t r1;

    pixman_region32_t r2;

    pixman_region32_t r3;

    pixman_box32_t boxes[] = {

	{ 10, 10, 20, 20 },

	{ 30, 30, 30, 40 },

	{ 50, 45, 60, 44 },

    };

    pixman_box32_t boxes2[] = {

	{ 2, 6, 7, 6 },

	{ 4, 1, 6, 7 },

    };

    pixman_box32_t boxes3[] = {

	{ 2, 6, 7, 6 },

	{ 4, 1, 6, 1 },

    };

    int i, j;

    pixman_box32_t *b;

    pixman_image_t *image, *fill;

    pixman_color_t white = {

	0xffff,

	0xffff,

	0xffff,

	0xffff

    };

    prng_srand (0);

    /* This used to go into an infinite loop before pixman-region.c

     * was fixed to not use explict "short" variables

     */

    pixman_region32_init_rect (&r1, 0, 0, 20, 64000);

    pixman_region32_init_rect (&r2, 0, 0, 20, 64000);

    pixman_region32_init_rect (&r3, 0, 0, 20, 64000);

    pixman_region32_subtract (&r1, &r2, &r3;;

    /* This would produce a region containing an empty

     * rectangle in it. Such regions are considered malformed,

     * but using an empty rectangle for initialization should

     * work.

     */

    pixman_region32_init_rects (&r1, boxes, 3);

    b = pixman_region32_rectangles (&r1, &i);

    assert (i == 1);

    while (i--)

    {

	assert (b[i].x1 < b[i].x2);

	assert (b[i].y1 < b[i].y2);

    }

    /* This would produce a rectangle containing the bounding box

     * of the two rectangles. The correct result is to eliminate

     * the broken rectangle.

     */

    pixman_region32_init_rects (&r1, boxes2, 2);

    b = pixman_region32_rectangles (&r1, &i);

    assert (i == 1);

    assert (b[0].x1 == 4);

    assert (b[0].y1 == 1);

    assert (b[0].x2 == 6);

    assert (b[0].y2 == 7);

    /* This should produce an empty region */

    pixman_region32_init_rects (&r1, boxes3, 2);

    b = pixman_region32_rectangles (&r1, &i);

    assert (i == 0);

    fill = pixman_image_create_solid_fill (&white);

    for (i = 0; i < 100; i++)

    {

	int image_size = 128;

	pixman_region32_init (&r1;;

	/* Add some random rectangles */

	for (j = 0; j < 64; j++)

	    pixman_region32_union_rect (&r1, &r1,

					prng_rand_n (image_size),

					prng_rand_n (image_size),

					prng_rand_n (25),

					prng_rand_n (25));

	/* Clip to image size */

	pixman_region32_init_rect (&r2, 0, 0, image_size, image_size);

	pixman_region32_intersect (&r1, &r1, &r2;;

	pixman_region32_fini (&r2;;

	/* render region to a1 mask */

	image = pixman_image_create_bits (PIXMAN_a1, image_size, image_size, NULL, 0);

	pixman_image_set_clip_region32 (image, &r1;;

	pixman_image_composite32 (PIXMAN_OP_SRC,

				  fill, NULL, image,

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

				  image_size, image_size);

	pixman_region32_init_from_image (&r2, image);

	pixman_image_unref (image);

	assert (pixman_region32_equal (&r1, &r2));

	pixman_region32_fini (&r1;;

	pixman_region32_fini (&r2;;

    }

    pixman_image_unref (fill);

    return 0;

}