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Diffstat (limited to 'test/radial-gradient.c')
-rw-r--r-- | test/radial-gradient.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/test/radial-gradient.c b/test/radial-gradient.c new file mode 100644 index 00000000..1207943a --- /dev/null +++ b/test/radial-gradient.c @@ -0,0 +1,110 @@ +/* + * 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" + +static cairo_test_draw_function_t draw; + +#define NUM_GRADIENTS 4 +#define NUM_EXTEND 4 +#define SIZE 60 +#define WIDTH (SIZE * NUM_GRADIENTS) +#define HEIGHT (SIZE * NUM_EXTEND) + +cairo_test_t test = { + "radial-gradient", + "Simple test of radial gradients", + WIDTH, HEIGHT, + draw +}; + +static void +draw_gradient (cairo_t *cr, + int x, + int y, + int size, + double offset, + double inner_radius, + cairo_extend_t extend) +{ + cairo_pattern_t *pattern; + + cairo_save (cr); + + pattern = cairo_pattern_create_radial (x + size/2.0 + offset, + y + size/2.0 + offset, inner_radius, + x + size/2.0, + y + size/2.0, size/3.0); + 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; + double inner_radius, offset; + 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++) { + offset = i % 2 ? SIZE / 12.0 : 0.0; + inner_radius = i >= NUM_EXTEND / 2 ? SIZE / 6.0 : 0.0; + draw_gradient (cr, i * SIZE, j * SIZE, SIZE, + offset, inner_radius, extend[j]); + } + } + + return CAIRO_TEST_SUCCESS; +} + +int +main (void) +{ + return cairo_test (&test); +} |