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https://gitlab.freedesktop.org/cairo/cairo.git
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91 lines
3 KiB
C
91 lines
3 KiB
C
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/*
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* Copyright 2010 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Author: Benjamin Otte <otte@gnome.org>
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*/
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#include "cairo-test.h"
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#define DEVICE_OFFSET -10
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#define CLIP_OFFSET 25
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#define CLIP_SIZE 20
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#define WIDTH 50
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#define HEIGHT 50
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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 *similar;
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cairo_t *similar_cr;
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similar = cairo_surface_create_similar (cairo_get_target (cr),
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cairo_surface_get_content (cairo_get_target (cr)),
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width, height);
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cairo_surface_set_device_offset (similar, DEVICE_OFFSET, DEVICE_OFFSET);
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similar_cr = cairo_create (similar);
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/* Neutral gray background */
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cairo_set_source_rgb (similar_cr, 0.51613, 0.55555, 0.51613);
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cairo_paint (similar_cr);
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/* add a rectangle */
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cairo_rectangle (similar_cr, CLIP_OFFSET, CLIP_OFFSET, CLIP_SIZE, CLIP_SIZE);
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/* clip to the rectangle */
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cairo_clip_preserve (similar_cr);
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/* push a group. We now have a device offset. */
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cairo_push_group (similar_cr);
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/* push a group again. This is where the bug used to happen. */
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/* draw something */
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cairo_set_source_rgb (similar_cr, 1, 0, 0);
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cairo_fill (similar_cr);
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/* make sure the stuff we drew ends up on the output */
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cairo_pop_group_to_source (similar_cr);
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cairo_paint (similar_cr);
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cairo_pop_group_to_source (similar_cr);
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cairo_paint (similar_cr);
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cairo_destroy (similar_cr);
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cairo_set_source_surface (cr, similar, DEVICE_OFFSET, DEVICE_OFFSET);
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cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
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cairo_paint (cr);
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return CAIRO_TEST_SUCCESS;
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}
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CAIRO_TEST (push_group_path_offset,
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"Exercises a bug in Cairo 1.9 where existing paths applied the target's"
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" device offset twice when cairo_push_group() was called.",
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"group, path", /* keywords */
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NULL, /* requirements */
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WIDTH, HEIGHT,
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NULL, draw)
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