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/*
* Copyright © 2005, 2007 Red Hat, Inc.
*
* 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: Carl D. Worth <cworth@cworth.org>
*/
#include "cairo-test.h"
#define NUM_GRADIENTS 4
#define NUM_EXTEND 4
#define SIZE 60
#define WIDTH (SIZE * NUM_GRADIENTS * NUM_GRADIENTS)
#define HEIGHT (SIZE * NUM_EXTEND)
static void
draw_gradient (cairo_t *cr,
int x,
int y,
int size,
double r1_offset,
double r1_radius,
double r2_offset,
double r2_radius,
cairo_extend_t extend)
{
cairo_pattern_t *pattern;
cairo_save (cr);
pattern = cairo_pattern_create_radial (x + size/2.0 + r1_offset,
y + size/2.0 + r1_offset,
r1_radius,
x + size/2.0 + r2_offset,
y + size/2.0 + r2_offset,
r2_radius);
cairo_pattern_add_color_stop_rgba (pattern, 0.0,
1.0, 0.0, 0.0, 1.0);
cairo_pattern_add_color_stop_rgba (pattern, sqrt (1.0 / 2.0),
0.0, 1.0, 0.0, 0.0);
cairo_pattern_add_color_stop_rgba (pattern, 1.0,
0.0, 0.0, 1.0, 0.5);
cairo_pattern_set_extend (pattern, extend);
cairo_rectangle (cr, x, y, size, size);
cairo_clip (cr);
cairo_set_source (cr, pattern);
cairo_paint (cr);
cairo_pattern_destroy (pattern);
cairo_restore (cr);
}
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
int i, j, k;
cairo_extend_t extend[NUM_EXTEND] = {
CAIRO_EXTEND_NONE,
CAIRO_EXTEND_REPEAT,
CAIRO_EXTEND_REFLECT,
CAIRO_EXTEND_PAD
};
cairo_test_paint_checkered (cr);
for (j = 0; j < NUM_EXTEND; j++) {
for (i = 0; i < NUM_GRADIENTS; i++) {
double r1_offset = i % 2 ? SIZE / 12.0 : 0.0;
double r1_radius = i >= NUM_GRADIENTS / 2 ? SIZE / 6.0 : 0.0;
for (k = 0; k < NUM_GRADIENTS; k++) {
double r2_offset = k % 2 ? SIZE / 12.0 : 0.0;
double r2_radius = k >= NUM_GRADIENTS / 2 ? SIZE / 3.0 : SIZE / 12.;
draw_gradient (cr,
i * SIZE * NUM_GRADIENTS + k * SIZE, j * SIZE, SIZE,
r1_offset, r1_radius,
r2_offset, r2_radius,
extend[j]);
}
}
}
return CAIRO_TEST_SUCCESS;
}
CAIRO_TEST (radial_gradient,
"Simple test of radial gradients",
"gradient", /* keywords */
NULL, /* requirements */
WIDTH, HEIGHT,
NULL, draw)
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