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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).
101 lines
3 KiB
C
101 lines
3 KiB
C
/*
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* Copyright © 2005 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: Owen Taylor <otaylor@redhat.com>
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*/
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#include <math.h>
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#include "cairo-test.h"
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#include <stdio.h>
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#define SIZE 100
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#define BORDER 10
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#define LINE_WIDTH 20
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static cairo_test_draw_function_t draw;
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cairo_test_t test = {
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"clip-nesting",
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"Test clipping with multiple contexts for the same surface",
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SIZE, SIZE,
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draw
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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 *target_surface;
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cairo_t *cr2, *cr3;
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target_surface = cairo_get_group_target (cr);
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cr2 = cairo_create (target_surface);
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/* Draw a diagonal line and clip to it */
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cairo_move_to (cr2, BORDER, BORDER);
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cairo_line_to (cr2, BORDER + LINE_WIDTH, BORDER);
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cairo_line_to (cr2, SIZE - BORDER, SIZE - BORDER);
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cairo_line_to (cr2, SIZE - BORDER - LINE_WIDTH, SIZE - BORDER);
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cairo_clip (cr2);
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cairo_set_source_rgb (cr2, 0, 0, 1); /* Blue */
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cairo_paint (cr2);
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/* Clipping affects this cairo_t */
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cairo_set_source_rgb (cr2, 1, 1, 1); /* White */
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cairo_rectangle (cr2,
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SIZE / 2 - LINE_WIDTH / 2, BORDER,
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LINE_WIDTH, SIZE - 2 * BORDER);
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cairo_fill (cr2);
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/* But doesn't affect another cairo_t that we create temporarily for
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* the same surface
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*/
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cr3 = cairo_create (target_surface);
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cairo_set_source_rgb (cr3, 1, 1, 1); /* White */
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cairo_rectangle (cr3,
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SIZE - BORDER - LINE_WIDTH, BORDER,
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LINE_WIDTH, SIZE - 2 * BORDER);
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cairo_fill (cr3);
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cairo_destroy (cr3);
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cairo_destroy (cr2);
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/* And doesn't affect anything after this cairo_t is destroyed */
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cairo_set_source_rgb (cr, 1, 1, 1); /* White */
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cairo_rectangle (cr,
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BORDER, BORDER,
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LINE_WIDTH, SIZE - 2 * BORDER);
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cairo_fill (cr);
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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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