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author | Chris Wilson <chris@chris-wilson.co.uk> | 2010-01-15 12:17:30 +0000 |
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committer | Chris Wilson <chris@chris-wilson.co.uk> | 2010-01-15 12:25:53 +0000 |
commit | f40560a9bb5b12d2584ed297bf4114baf2aa9cc1 (patch) | |
tree | 0e2a95ec07e6c89b00297a32b2f55210734dcfdd /test/linear-uniform.c | |
parent | e22c02dbaeda6941083fc89b517508dc0c4386a0 (diff) | |
download | cairo-f40560a9bb5b12d2584ed297bf4114baf2aa9cc1.tar.gz |
test: Add linear-uniform
Jeff reported a regression found by Mozilla whereby a uniform gradient
was not being premultiplied on conversion to a solid pattern.
https://bugzilla.mozilla.org/show_bug.cgi?id=539165
[Bug 539165] gradients with a single stop do not have their color
multiplied by the alpha.
Diffstat (limited to 'test/linear-uniform.c')
-rw-r--r-- | test/linear-uniform.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/test/linear-uniform.c b/test/linear-uniform.c new file mode 100644 index 000000000..2f6553502 --- /dev/null +++ b/test/linear-uniform.c @@ -0,0 +1,63 @@ +/* + * Copyright © 2010 Intel Corporation + * + * Permission is hereby granted, free of charge, to any person + * obtaining a copy of this software and associated documentation + * files (the "Software"), to deal in the Software without + * restriction, including without limitation the rights to use, copy, + * modify, merge, publish, distribute, sublicense, and/or sell copies + * of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + * + * Author: Chris Wilson <chris@chris-wilson.co.uk> + */ + +#include "cairo-test.h" + +static cairo_test_status_t +draw (cairo_t *cr, int width, int height) +{ + cairo_pattern_t *pattern; + + cairo_set_source_rgb (cr, 0, 0, 0); + cairo_paint (cr); + + /* with alpha */ + pattern = cairo_pattern_create_linear (0, 0, 0, height); + cairo_pattern_add_color_stop_rgba (pattern, 0, 1, 1, 1, .5); + cairo_pattern_add_color_stop_rgba (pattern, 1, 1, 1, 1, .5); + cairo_set_source (cr, pattern); + cairo_pattern_destroy (pattern); + cairo_rectangle (cr, 0, 0, width/2, height); + cairo_fill (cr); + + /* without alpha */ + pattern = cairo_pattern_create_linear (0, 0, 0, height); + cairo_pattern_add_color_stop_rgb (pattern, 0, 1, 1, 1); + cairo_pattern_add_color_stop_rgb (pattern, 1, 1, 1, 1); + cairo_set_source (cr, pattern); + cairo_pattern_destroy (pattern); + cairo_rectangle (cr, width/2, 0, width/2, height); + cairo_fill (cr); + + return CAIRO_TEST_SUCCESS; +} + +CAIRO_TEST (linear_uniform, + "Tests handling of \"solid\" linear gradients", + "gradient, linear", /* keywords */ + NULL, /* requirements */ + 40, 40, + NULL, draw) |