/* * 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)