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[test] Add gradient-constant-alpha.

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PostScript can handle alpha gradients, iff they have a constant alpha. So
exercise that path.
This commit is contained in:
Chris Wilson 2008-09-07 12:12:59 +01:00
parent a33f2f6962
commit 94fd60d5ec
2 changed files with 76 additions and 0 deletions
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7
test/Makefile.am
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@ -66,6 +66,7 @@ get-clip$(EXEEXT) \
get-group-target$(EXEEXT) \
get-path-extents$(EXEEXT) \
gradient-alpha$(EXEEXT) \
gradient-constant-alpha$(EXEEXT) \
gradient-zero-stops$(EXEEXT) \
group-paint$(EXEEXT) \
image-surface-source$(EXEEXT) \
@ -452,6 +453,12 @@ REFERENCE_IMAGES = \
gradient-alpha-ps-rgb24-ref.png \
gradient-alpha-ref.png \
gradient-alpha-rgb24-ref.png \
gradient-constant-alpha-pdf-argb32-ref.png \
gradient-constant-alpha-pdf-rgb24-ref.png \
gradient-constant-alpha-ps-argb32-ref.png \
gradient-constant-alpha-ps-rgb24-ref.png \
gradient-constant-alpha-ref.png \
gradient-constant-alpha-rgb24-ref.png \
gradient-zero-stops-ref.png \
gradient-zero-stops-rgb24-ref.png \
group-paint-ref.png \

69
test/gradient-constant-alpha.c Normal file
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@ -0,0 +1,69 @@
/*
* Copyright © 2005 Red Hat, Inc.
* Copyright © 2008 Chris Wilson
*
* 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>
* Chris Wilson <chris@chris-wilson.co.uk>
*/
#include "cairo-test.h"
static cairo_test_draw_function_t draw;
static const cairo_test_t test = {
"gradient-constant-alpha",
"Tests drawing of a gradient with constant alpha values in the color stops\n",
10, 10,
draw
};
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
cairo_pattern_t *gradient;
gradient = cairo_pattern_create_linear (0, 0,
0, height);
cairo_pattern_add_color_stop_rgba (gradient, 0.0,
1.0, 0.0, 0.0,
0.5);
cairo_pattern_add_color_stop_rgba (gradient, 0.0,
0.0, 1.0, 0.0,
0.5);
cairo_pattern_add_color_stop_rgba (gradient, 1.0,
0.0, 0.0, 1.0,
0.5);
cairo_set_source (cr, gradient);
cairo_paint (cr);
cairo_pattern_destroy (gradient);
return CAIRO_TEST_SUCCESS;
}
int
main (void)
{
return cairo_test (&test);
}