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test: Add clip-intersect

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Exercises a bug in the unbounded drawing of an empty polygon...

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2011-07-24 13:05:24 +01:00
parent 4d5c95f629
commit e4b3f84d4c
4 changed files with 96 additions and 0 deletions
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1
test/Makefile.refs
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@ -152,6 +152,7 @@ REFERENCE_IMAGES = \
clip-image.image16.ref.png \
clip-image.ps.ref.png \
clip-image.ref.png \
clip-intersect.ref.png \
clip-nesting.pdf.argb32.ref.png \
clip-nesting.ps.argb32.ref.png \
clip-nesting.ps.rgb24.ref.png \

1
test/Makefile.sources
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@ -42,6 +42,7 @@ test_sources = \
clip-fill-rule-pixel-aligned.c \
clip-group-shapes.c \
clip-image.c \
clip-intersect.c \
clip-nesting.c \
clip-operator.c \
clip-push-group.c \

94
test/clip-intersect.c Normal file
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@ -0,0 +1,94 @@
/*
* Copyright 2009 Chris Wilson
* Copyright 2011 Intel Corporation
*
* 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
* Chris Wilson not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior
* permission. Chris Wilson makes no representations about the
* suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* CHRIS WILSON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL CHRIS WILSON 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: Chris Wilson <chris@chris-wilson.co.uk>
*/
#include "cairo-test.h"
#define WIDTH 20
#define HEIGHT 20
static void clip_mask (cairo_t *cr)
{
cairo_move_to (cr, 10, 0);
cairo_line_to (cr, 0, 10);
cairo_line_to (cr, 10, 20);
cairo_line_to (cr, 20, 10);
cairo_clip (cr);
}
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
cairo_set_source_rgb (cr, 1, 1, 1);
cairo_paint (cr);
clip_mask (cr);
cairo_set_source_rgb (cr, 0, 1, 0);
cairo_paint (cr);
cairo_reset_clip (cr);
cairo_set_source_rgb (cr, 1, 0, 0);
cairo_rectangle (cr, 0, 0, 4, 4);
cairo_clip (cr);
clip_mask (cr);
cairo_paint (cr);
cairo_reset_clip (cr);
cairo_rectangle (cr, 20, 0, -4, 4);
cairo_clip (cr);
clip_mask (cr);
cairo_paint (cr);
cairo_reset_clip (cr);
cairo_rectangle (cr, 20, 20, -4, -4);
cairo_clip (cr);
clip_mask (cr);
cairo_paint (cr);
cairo_reset_clip (cr);
cairo_rectangle (cr, 0, 20, 4, -4);
cairo_clip (cr);
clip_mask (cr);
cairo_paint (cr);
cairo_reset_clip (cr);
cairo_set_source_rgb (cr, 0, 0, 1);
cairo_rectangle (cr, 8, 8, 4, 4);
cairo_clip (cr);
clip_mask (cr);
cairo_paint (cr);
cairo_reset_clip (cr);
return CAIRO_TEST_SUCCESS;
}
CAIRO_TEST (clip_intersect,
"Tests intersection of a simple clip with a clip-mask",
"clip, paint", /* keywords */
NULL, /* requirements */
WIDTH, HEIGHT,
NULL, draw)

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