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4dc62bbedc
Include additional gradients to cover the cases where r1 > r2, as a pixman bug was exposed by: [Bug 22908] Invalid output of radial gradient http://bugs.freedesktop.org/show_bug.cgi?id=22908
112 lines
3.3 KiB
C
112 lines
3.3 KiB
C
/*
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* Copyright © 2005, 2007 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: Carl D. Worth <cworth@cworth.org>
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*/
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#include "cairo-test.h"
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#define NUM_GRADIENTS 4
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#define NUM_EXTEND 4
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#define SIZE 60
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#define WIDTH (SIZE * NUM_GRADIENTS * NUM_GRADIENTS)
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#define HEIGHT (SIZE * NUM_EXTEND)
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static void
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draw_gradient (cairo_t *cr,
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int x,
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int y,
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int size,
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double r1_offset,
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double r1_radius,
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double r2_offset,
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double r2_radius,
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cairo_extend_t extend)
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{
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cairo_pattern_t *pattern;
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cairo_save (cr);
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pattern = cairo_pattern_create_radial (x + size/2.0 + r1_offset,
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y + size/2.0 + r1_offset,
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r1_radius,
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x + size/2.0 + r2_offset,
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y + size/2.0 + r2_offset,
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r2_radius);
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cairo_pattern_add_color_stop_rgba (pattern, 0.0,
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1.0, 0.0, 0.0, 1.0);
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cairo_pattern_add_color_stop_rgba (pattern, sqrt (1.0 / 2.0),
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0.0, 1.0, 0.0, 0.0);
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cairo_pattern_add_color_stop_rgba (pattern, 1.0,
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0.0, 0.0, 1.0, 0.5);
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cairo_pattern_set_extend (pattern, extend);
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cairo_rectangle (cr, x, y, size, size);
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cairo_clip (cr);
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cairo_set_source (cr, pattern);
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cairo_paint (cr);
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cairo_pattern_destroy (pattern);
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cairo_restore (cr);
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}
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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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int i, j, k;
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cairo_extend_t extend[NUM_EXTEND] = {
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CAIRO_EXTEND_NONE,
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CAIRO_EXTEND_REPEAT,
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CAIRO_EXTEND_REFLECT,
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CAIRO_EXTEND_PAD
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};
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cairo_test_paint_checkered (cr);
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for (j = 0; j < NUM_EXTEND; j++) {
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for (i = 0; i < NUM_GRADIENTS; i++) {
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double r1_offset = i % 2 ? SIZE / 12.0 : 0.0;
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double r1_radius = i >= NUM_GRADIENTS / 2 ? SIZE / 6.0 : 0.0;
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for (k = 0; k < NUM_GRADIENTS; k++) {
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double r2_offset = k % 2 ? SIZE / 12.0 : 0.0;
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double r2_radius = k >= NUM_GRADIENTS / 2 ? SIZE / 3.0 : SIZE / 12.;
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draw_gradient (cr,
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i * SIZE * NUM_GRADIENTS + k * SIZE, j * SIZE, SIZE,
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r1_offset, r1_radius,
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r2_offset, r2_radius,
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extend[j]);
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}
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}
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}
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return CAIRO_TEST_SUCCESS;
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}
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CAIRO_TEST (radial_gradient,
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"Simple test of radial gradients",
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"gradient", /* keywords */
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NULL, /* requirements */
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WIDTH, HEIGHT,
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NULL, draw)
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