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/*
* Copyright © 2006 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: Carl D. Worth <cworth@cworth.org>
*/
#include "cairo-test.h"
#include <stddef.h>
#define SIZE 10
#define PAD 2
static void
draw_square (cairo_t *cr)
{
cairo_rectangle (cr,
PAD, PAD,
SIZE - 2 * PAD,
SIZE - 2 * PAD);
cairo_fill (cr);
}
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
cairo_surface_t *surface, *target;
cairo_t *cr2;
/* First draw a shape in blue on the original destination. */
cairo_set_source_rgb (cr, 0, 0, 1); /* blue */
draw_square (cr);
/* Then, create an offset surface and repeat the drawing in red. */
target = cairo_get_group_target (cr);
surface = cairo_surface_create_similar (target,
cairo_surface_get_content (target),
SIZE / 2, SIZE / 2);
cairo_surface_set_device_offset (surface, - SIZE / 2, - SIZE / 2);
cr2 = cairo_create (surface);
cairo_surface_destroy (surface);
cairo_set_source_rgb (cr2, 1, 0, 0); /* red */
draw_square (cr2);
/* Finally, copy the offset surface to the original destination.
* The final result should be a blue square with the lower-right
* quarter red. */
cairo_set_source_surface (cr, cairo_get_target (cr2), 0, 0);
cairo_destroy (cr2);
cairo_paint (cr);
return CAIRO_TEST_SUCCESS;
}
CAIRO_TEST (device_offset,
"Simple test using a surface with a negative device-offset as a source.",
"device-offset", /* keywords */
NULL, /* requirements */
SIZE, SIZE,
NULL, draw)
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