2 * Copyright © 2005 Red Hat, Inc.
3 * Copyright © 2006 Red Hat, Inc.
5 * Permission to use, copy, modify, distribute, and sell this software
6 * and its documentation for any purpose is hereby granted without
7 * fee, provided that the above copyright notice appear in all copies
8 * and that both that copyright notice and this permission notice
9 * appear in supporting documentation, and that the name of
10 * Red Hat, Inc. not be used in advertising or publicity pertaining to
11 * distribution of the software without specific, written prior
12 * permission. Red Hat, Inc. makes no representations about the
13 * suitability of this software for any purpose. It is provided "as
14 * is" without express or implied warranty.
16 * RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
17 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
18 * FITNESS, IN NO EVENT SHALL RED HAT, INC. BE LIABLE FOR ANY SPECIAL,
19 * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
20 * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
21 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
22 * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
24 * Author: Carl D. Worth <cworth@cworth.org>
27 #include "cairo-test.h"
32 typedef void (*path_func_t) (cairo_t *cr);
35 rectangle (cairo_t *cr)
37 cairo_rectangle (cr, PAD, PAD, SIZE, SIZE);
44 PAD + SIZE / 2, PAD + SIZE / 2,
49 /* Given a path-generating function and two possibly translucent
50 * patterns, fill and stroke the path with the patterns (to an
51 * offscreen group), then blend the result into the destination.
54 fill_and_stroke (cairo_t *cr,
55 path_func_t path_func,
56 cairo_pattern_t *fill_pattern,
57 cairo_pattern_t *stroke_pattern)
59 cairo_push_group (cr);
62 cairo_set_source (cr, fill_pattern);
63 cairo_fill_preserve (cr);
65 /* Use DEST_OUT to subtract stroke from fill. */
66 cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
67 cairo_set_operator (cr, CAIRO_OPERATOR_DEST_OUT);
68 cairo_stroke_preserve (cr);
70 /* Then use ADD to draw the stroke without a seam. */
71 cairo_set_source (cr, stroke_pattern);
72 cairo_set_operator (cr, CAIRO_OPERATOR_ADD);
75 cairo_pop_group_to_source (cr);
79 static cairo_test_status_t
80 draw (cairo_t *cr, int width, int height)
82 cairo_pattern_t *blue;
85 blue = cairo_pattern_create_rgba (0.0, 0.0, 1.0, 0.8);
86 red = cairo_pattern_create_rgba (1.0, 0.0, 0.0, 0.2);
88 cairo_test_paint_checkered (cr);
90 fill_and_stroke (cr, rectangle, blue, red);
92 cairo_translate (cr, SIZE + 2 * PAD, 0);
94 fill_and_stroke (cr, circle, red, blue);
96 cairo_pattern_destroy (blue);
97 cairo_pattern_destroy (red);
99 return CAIRO_TEST_SUCCESS;
102 CAIRO_TEST (fill_and_stroke_alpha_add,
103 "Use a group to fill/stroke a path (each with different alpha) using DEST_OUT and ADD to combine",
104 "fill-and-stroke, fill, stroke", /* keywords */
105 NULL, /* requirements */
106 2 * SIZE + 4 * PAD, SIZE + 2 * PAD,