/* * Copyright © 2005 Red Hat, Inc. * * 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 * Red Hat, Inc. not be used in advertising or publicity pertaining to * distribution of the software without specific, written prior * permission. Red Hat, Inc. makes no representations about the * suitability of this software for any purpose. It is provided "as * is" without express or implied warranty. * * RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND * FITNESS, IN NO EVENT SHALL RED HAT, INC. 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: Owen Taylor <otaylor@redhat.com> */ #include <math.h> #include "cairo-test.h" #include <stdio.h> #define SIZE 40 static cairo_test_status_t draw (cairo_t *cr, int width, int height) { cairo_pattern_t *pattern; cairo_matrix_t matrix; /* Paint a diagonal division as a test image */ cairo_set_source_rgb (cr, 1, 1, 1); /* White */ cairo_paint (cr); cairo_move_to (cr, SIZE, 0); cairo_line_to (cr, SIZE, SIZE); cairo_line_to (cr, 0, SIZE); cairo_set_source_rgb (cr, 0, 0, 0); cairo_fill (cr); /* Create a pattern with the target surface as the source, * offset by SIZE/2 */ pattern = cairo_pattern_create_for_surface (cairo_get_group_target (cr)); cairo_matrix_init_translate (&matrix, - SIZE / 2, - SIZE / 2); cairo_pattern_set_matrix (pattern, &matrix); cairo_set_source (cr, pattern); cairo_pattern_destroy (pattern); /* Copy two rectangles from the upper-left quarter of the image to * the lower right. It will work if we use cairo_fill(), but the * cairo_clip() cairo_paint() combination fails because the clip * on the surface as a destination affects it as the source as * well. */ cairo_rectangle (cr, 2 * SIZE / 4, 2 * SIZE / 4, SIZE / 4, SIZE / 4); cairo_rectangle (cr, 3 * SIZE / 4, 3 * SIZE / 4, SIZE / 4, SIZE / 4); cairo_clip (cr); cairo_paint (cr); return CAIRO_TEST_SUCCESS; } CAIRO_TEST (self_copy, "Test copying from a surface to itself with a clip", "paint", /* keywords */ NULL, /* requirements */ SIZE, SIZE, NULL, draw)