| /* |
| * Copyright © 2008 Chris Wilson |
| * |
| * Permission to use, copy, modify, distribute, and sell this software |
| * and its documentation for any purpose is hereby granted without |
| * fee, provided that the above copyright notice appear in all copies |
| * and that both that copyright notice and this permission notice |
| * appear in supporting documentation, and that the name of |
| * Chris Wilson not be used in advertising or publicity pertaining to |
| * distribution of the software without specific, written prior |
| * permission. Chris Wilson makes no representations about the |
| * suitability of this software for any purpose. It is provided "as |
| * is" without express or implied warranty. |
| * |
| * CHRIS WILSON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS |
| * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| * FITNESS, IN NO EVENT SHALL CHRIS WILSON BE LIABLE FOR ANY SPECIAL, |
| * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER |
| * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION |
| * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR |
| * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| * |
| * Author: Chris Wilson <chris@chris-wilson.co.uk> |
| */ |
| |
| #include "cairo-test.h" |
| |
| #define SIZE 60 /* needs to be big to check large area effects (dithering) */ |
| #define PAD 2 |
| |
| static cairo_test_status_t |
| draw (cairo_t *cr, int width, int height) |
| { |
| const double alpha = 1./3; |
| int n; |
| |
| /* flatten to white */ |
| cairo_set_source_rgb (cr, 1, 1, 1); |
| cairo_paint (cr); |
| |
| /* square */ |
| cairo_rectangle (cr, PAD, PAD, SIZE, SIZE); |
| cairo_set_source_rgba (cr, 1, 0, 0, alpha); |
| cairo_fill (cr); |
| |
| /* circle */ |
| cairo_translate (cr, SIZE + 2 * PAD, 0); |
| cairo_arc (cr, PAD + SIZE / 2., PAD + SIZE / 2., SIZE / 2., 0, 2 * M_PI); |
| cairo_set_source_rgba (cr, 0, 1, 0, alpha); |
| cairo_fill (cr); |
| |
| /* triangle */ |
| cairo_translate (cr, 0, SIZE + 2 * PAD); |
| cairo_move_to (cr, PAD + SIZE / 2, PAD); |
| cairo_line_to (cr, PAD + SIZE, PAD + SIZE); |
| cairo_line_to (cr, PAD, PAD + SIZE); |
| cairo_set_source_rgba (cr, 0, 0, 1, alpha); |
| cairo_fill (cr); |
| |
| /* star */ |
| cairo_translate (cr, -(SIZE + 2 * PAD) + SIZE/2., SIZE/2.); |
| for (n = 0; n < 5; n++) { |
| cairo_line_to (cr, |
| SIZE/2 * cos (2*n * 2*M_PI / 10), |
| SIZE/2 * sin (2*n * 2*M_PI / 10)); |
| |
| cairo_line_to (cr, |
| SIZE/4 * cos ((2*n+1)*2*M_PI / 10), |
| SIZE/4 * sin ((2*n+1)*2*M_PI / 10)); |
| } |
| cairo_set_source_rgba (cr, 0, 0, 0, alpha); |
| cairo_fill (cr); |
| |
| return CAIRO_TEST_SUCCESS; |
| } |
| |
| CAIRO_TEST (fill_alpha, |
| "Tests using set_rgba();fill()", |
| "fill, alpha", /* keywords */ |
| NULL, /* requirements */ |
| 2*SIZE + 4*PAD, 2*SIZE + 4*PAD, |
| NULL, draw) |