diff options
author | Carl Worth <cworth@cworth.org> | 2006-05-24 17:24:52 -0700 |
---|---|---|
committer | Carl Worth <cworth@cworth.org> | 2006-05-24 17:24:52 -0700 |
commit | 22232be7592dadc22fef614aefee9c9398a8510c (patch) | |
tree | 455c2a72dfcec6e05d6025443742f563bd75a1eb /test/device-offset.c | |
parent | d0dd3b822e98358e88f8c9261ef633331548ccfd (diff) | |
download | cairo-22232be7592dadc22fef614aefee9c9398a8510c.tar.gz |
Note the changed semantics of cairo_surface_set_device_offset
Specifically, device offsets now affect using the offset surface in
a source pattern as well as drawing to the surface. This behavior
os also verified with a new test case: test/device-offset.c
Diffstat (limited to 'test/device-offset.c')
-rw-r--r-- | test/device-offset.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/test/device-offset.c b/test/device-offset.c new file mode 100644 index 000000000..9418c6030 --- /dev/null +++ b/test/device-offset.c @@ -0,0 +1,93 @@ +/* + * 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 + +cairo_test_t test = { + "device-offset", + "Simple test using a surface with a device-offset as a source.", + SIZE, SIZE +}; + +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 black on the original destination. */ + cairo_set_source_rgb (cr, 0, 0, 1); /* blue */ + draw_square (cr); + + cairo_surface_write_to_png (cairo_get_target (cr), "/tmp/a.png"); + + /* Then, create an offset surface and repeat the drawing in red. */ + target = cairo_get_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_set_source_rgb (cr2, 1, 0, 0); /* red */ + draw_square (cr2); + + cairo_surface_write_to_png (surface, "/tmp/b.png"); + + cairo_destroy (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, surface, 0, 0); + + cairo_paint (cr); + + cairo_surface_write_to_png (cairo_get_target (cr), "/tmp/c.png"); + + cairo_surface_destroy (surface); + + return CAIRO_TEST_SUCCESS; +} + +int +main (void) +{ + return cairo_test (&test, draw); +} |