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3bf06c3366
cairo_get_target() returns the original surface passed to cairo_create(), and not the current destination as required when testing drawing to the same surface using multiple contexts. For completeness we also use the group target when creating similar surfaces within the tests (to check that similar surfaces of similar surfaces also work).
91 lines
2.7 KiB
C
91 lines
2.7 KiB
C
/*
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* Copyright © 2006 Red Hat, Inc.
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*
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* Permission to use, copy, modify, distribute, and sell this software
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* and its documentation for any purpose is hereby granted without
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* fee, provided that the above copyright notice appear in all copies
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* and that both that copyright notice and this permission notice
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* appear in supporting documentation, and that the name of
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* Red Hat, Inc. not be used in advertising or publicity pertaining to
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* distribution of the software without specific, written prior
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* permission. Red Hat, Inc. makes no representations about the
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* suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
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* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS, IN NO EVENT SHALL RED HAT, INC. BE LIABLE FOR ANY SPECIAL,
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* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
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* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
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* IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Author: Carl D. Worth <cworth@cworth.org>
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*/
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#include "cairo-test.h"
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#include <stddef.h>
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#define SIZE 10
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#define PAD 2
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static cairo_test_draw_function_t draw;
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cairo_test_t test = {
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"device-offset-positive",
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"Simple test using a surface with a positive device-offset as a source.",
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SIZE, SIZE,
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draw
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};
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static void
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draw_square (cairo_t *cr)
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{
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cairo_rectangle (cr,
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PAD, PAD,
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SIZE - 2 * PAD,
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SIZE - 2 * PAD);
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cairo_fill (cr);
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}
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static cairo_test_status_t
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draw (cairo_t *cr, int width, int height)
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{
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cairo_surface_t *surface, *target;
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cairo_t *cr2;
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/* First draw a shape in blue on the original destination. */
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cairo_set_source_rgb (cr, 0, 0, 1); /* blue */
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draw_square (cr);
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/* Then, create an offset surface and repeat the drawing in red. */
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target = cairo_get_group_target (cr);
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surface = cairo_surface_create_similar (target,
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cairo_surface_get_content (target),
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SIZE / 2, SIZE / 2);
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cr2 = cairo_create (surface);
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cairo_set_source_rgb (cr2, 1, 0, 0); /* red */
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draw_square (cr2);
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cairo_destroy (cr2);
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cairo_surface_set_device_offset (surface, + SIZE / 2, + SIZE / 2);
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/* Finally, copy the offset surface to the original destination.
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* The final result should be a blue square with the upper-left
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* quarter red. */
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cairo_set_source_surface (cr, surface, SIZE / 2, SIZE / 2);
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cairo_paint (cr);
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cairo_surface_destroy (surface);
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return CAIRO_TEST_SUCCESS;
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}
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int
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main (void)
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{
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return cairo_test (&test);
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}
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