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author | Chris Wilson <chris@chris-wilson.co.uk> | 2010-02-02 16:24:30 +0000 |
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committer | Chris Wilson <chris@chris-wilson.co.uk> | 2010-02-02 16:31:36 +0000 |
commit | 2a59220aa448cd7416f1851c4c62ca6ac396302d (patch) | |
tree | afafd35a7b68bfffb265f11e5d664c099553953a /test/linear-step-function.c | |
parent | 7b37ba8a49dca39a42b5395e0715d3d0a5a89972 (diff) | |
download | cairo-2a59220aa448cd7416f1851c4c62ca6ac396302d.tar.gz |
test: Add linear-step-function
Another bug identified by Jeff Muizelaar was that the bounds for a
zero-length (i.e. it started and stopped at the same point) were
miscomputed. This test case exercises that bug.
Note: I believe the output is wrong here when padding a zero-length
gradient. On the left it should be red, and on the right it should be
blue.
Diffstat (limited to 'test/linear-step-function.c')
-rw-r--r-- | test/linear-step-function.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/test/linear-step-function.c b/test/linear-step-function.c new file mode 100644 index 000000000..da7e8ca19 --- /dev/null +++ b/test/linear-step-function.c @@ -0,0 +1,60 @@ +/* + * 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); + + pattern = cairo_pattern_create_linear (width/2, 0, width/2, 0); + cairo_pattern_add_color_stop_rgb (pattern, 0, 1, 0, 0); + cairo_pattern_add_color_stop_rgb (pattern, 1, 0, 0, 1); + cairo_set_source (cr, pattern); + + cairo_pattern_set_extend (pattern, CAIRO_EXTEND_NONE); /* nothing */ + cairo_rectangle (cr, 0, 0, width, height/2); + cairo_fill (cr); + + cairo_pattern_set_extend (pattern, CAIRO_EXTEND_PAD); /* step */ + cairo_rectangle (cr, 0, height/2, width, height/2); + cairo_fill (cr); + + cairo_pattern_destroy (pattern); + + return CAIRO_TEST_SUCCESS; +} + +CAIRO_TEST (linear_step_function, + "Tests creating a step function using a linear gradient", + "gradient, linear", /* keywords */ + NULL, /* requirements */ + 40, 40, + NULL, draw) |