#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>

#include <cairo.h>
#include <cairo-png.h>
#include <cairo-pdf.h>

const char filename[] = "clip.png";

#define WIDTH	32
#define HEIGHT	WIDTH
#define STEPS	10

#define IMAGE_WIDTH	( (WIDTH / 2 * STEPS) + 3 * WIDTH / 2 )
#define IMAGE_HEIGHT	IMAGE_WIDTH

int
main (int argc, char *argv[])
{
    FILE *fp;
    cairo_t *cr;
    cairo_surface_t *stamp, *target;

    fp = fopen ("pixman-bug.png", "w");
    target = cairo_png_surface_create (fp, CAIRO_FORMAT_ARGB32,
				       IMAGE_WIDTH, IMAGE_HEIGHT);

    cr = cairo_create ();
    stamp = cairo_surface_create_similar (target, CAIRO_FORMAT_ARGB32,
					  WIDTH, HEIGHT);
    cairo_set_target_surface (cr, stamp);
    cairo_new_path (cr);
    cairo_rectangle (cr, WIDTH / 4, HEIGHT / 4, WIDTH / 2, HEIGHT / 2);
    cairo_set_rgb_color (cr, 1, 0, 0);
    cairo_set_alpha (cr, 0.8);
    cairo_fill (cr);

    cairo_rectangle (cr, 0, 0, WIDTH, HEIGHT);
    cairo_set_line_width (cr, 2);
    cairo_set_rgb_color (cr, 0, 0, 0);
    cairo_set_alpha (cr, 1);
    cairo_stroke (cr);

    cairo_set_target_surface (cr, target);

    /* Draw a translucent rectangle for reference where the rotated
     * image should be. */
    cairo_new_path (cr);
    cairo_rectangle (cr, WIDTH, HEIGHT, WIDTH, HEIGHT);
    cairo_set_rgb_color (cr, 1, 1, 0);
    cairo_set_alpha (cr, 0.3);
    cairo_fill (cr);

    cairo_translate (cr, 2 * WIDTH, 2 * HEIGHT);
    cairo_rotate (cr, M_PI);
    cairo_set_alpha (cr, 1);
    cairo_show_surface (cr, stamp, WIDTH + 2, HEIGHT + 2);

    cairo_show_page (cr);

    cairo_surface_destroy (stamp);
    cairo_surface_destroy (target);

    cairo_destroy (cr);

    return 0;
}