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/*
* Copyright © 2005 Red Hat, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software
* and its documentation for any purpose is hereby granted without
* fee, provided that the above copyright notice appear in all copies
* and that both that copyright notice and this permission notice
* appear in supporting documentation, and that the name of
* Red Hat, Inc. not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior
* permission. Red Hat, Inc. makes no representations about the
* suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL RED HAT, INC. BE LIABLE FOR ANY SPECIAL,
* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
* IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Author: Owen Taylor <otaylor@redhat.com>
*/
#include <math.h>
#include "cairo-test.h"
#include <stdio.h>
#define SIZE 40
static cairo_test_draw_function_t draw;
cairo_test_t test = {
"self-copy",
"Test copying from a surface to itself with a clip",
SIZE, SIZE,
draw
};
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
cairo_pattern_t *pattern;
cairo_matrix_t matrix;
/* Paint a diagonal division as a test image */
cairo_set_source_rgb (cr, 1, 1, 1); /* White */
cairo_paint (cr);
cairo_move_to (cr, SIZE, 0);
cairo_line_to (cr, SIZE, SIZE);
cairo_line_to (cr, 0, SIZE);
cairo_set_source_rgb (cr, 0, 0, 0);
cairo_fill (cr);
/* Create a pattern with the target surface as the source,
* offset by SIZE/2
*/
pattern = cairo_pattern_create_for_surface (cairo_get_target (cr));
cairo_matrix_init_translate (&matrix, - SIZE / 2, - SIZE / 2);
cairo_pattern_set_matrix (pattern, &matrix);
cairo_set_source (cr, pattern);
cairo_pattern_destroy (pattern);
/* Copy two rectangles from the upper-left quarter of the image to
* the lower right. It will work if we use cairo_fill(), but the
* cairo_clip() cairo_paint() combination fails because the clip
* on the surface as a destination affects it as the source as
* well.
*/
cairo_rectangle (cr,
2 * SIZE / 4, 2 * SIZE / 4,
SIZE / 4, SIZE / 4);
cairo_rectangle (cr,
3 * SIZE / 4, 3 * SIZE / 4,
SIZE / 4, SIZE / 4);
cairo_clip (cr);
cairo_paint (cr);
return CAIRO_TEST_SUCCESS;
}
int
main (void)
{
return cairo_test (&test);
}
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