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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <cairo.h>
#include "cairo-test.h"
#define WIDTH 32
#define HEIGHT WIDTH
#define IMAGE_WIDTH (3 * WIDTH)
#define IMAGE_HEIGHT IMAGE_WIDTH
cairo_test_t test = {
"pixman-rotate",
"Exposes pixman off-by-one error when rotating",
IMAGE_WIDTH, IMAGE_HEIGHT
};
/* Draw the word cairo at NUM_TEXT different angles */
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
cairo_surface_t *stamp;
cairo_t *cr2;
stamp = cairo_surface_create_similar (cairo_get_target (cr),
CAIRO_CONTENT_COLOR_ALPHA,
WIDTH, HEIGHT);
cr2 = cairo_create (stamp);
{
cairo_new_path (cr2);
cairo_rectangle (cr2, WIDTH / 4, HEIGHT / 4, WIDTH / 2, HEIGHT / 2);
cairo_set_source_rgba (cr2, 1, 0, 0, 0.8);
cairo_fill (cr2);
cairo_rectangle (cr2, 0, 0, WIDTH, HEIGHT);
cairo_set_line_width (cr2, 2);
cairo_set_source_rgb (cr2, 0, 0, 0);
cairo_stroke (cr2);
}
cairo_destroy (cr2);
/* 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_source_rgba (cr, 1, 1, 0, 0.3);
cairo_fill (cr);
#if 1 /* Set to 0 to generate reference image */
cairo_translate (cr, 2 * WIDTH, 2 * HEIGHT);
cairo_rotate (cr, M_PI);
#else
cairo_translate (cr, WIDTH, HEIGHT);
#endif
cairo_set_source_surface (cr, stamp, 0, 0);
cairo_paint (cr);
cairo_show_page (cr);
cairo_surface_destroy (stamp);
return CAIRO_TEST_SUCCESS;
}
int
main (void)
{
return cairo_test_expect_failure (&test, draw,
"known off-by-one bug when rotating a pixman image");
}
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