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author | Carl Worth <cworth@cworth.org> | 2006-05-04 21:35:23 -0700 |
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committer | Carl Worth <cworth@cworth.org> | 2006-05-04 21:35:23 -0700 |
commit | 344c2c7acd0a87a7a28b4a73ba340b333fefb2bf (patch) | |
tree | 4c54ef6ce71b9cbde16a51474377f57fd836c5ff /test/fill-and-stroke-alpha-add.c | |
parent | a16f0b4223a5cc9faa68d844b8fd3ff1bfb996b7 (diff) | |
download | cairo-344c2c7acd0a87a7a28b4a73ba340b333fefb2bf.tar.gz |
Add a couple more group-using tests: fill-and-stroke-alpha[-add]
Diffstat (limited to 'test/fill-and-stroke-alpha-add.c')
-rw-r--r-- | test/fill-and-stroke-alpha-add.c | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/test/fill-and-stroke-alpha-add.c b/test/fill-and-stroke-alpha-add.c new file mode 100644 index 000000000..2e59cb814 --- /dev/null +++ b/test/fill-and-stroke-alpha-add.c @@ -0,0 +1,112 @@ +/* + * Copyright © 2005 Red Hat, Inc. + * Copyright © 2006 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: Carl D. Worth <cworth@cworth.org> + */ + +#include "cairo-test.h" + +#define PAD 2 +#define SIZE 10 + +cairo_test_t test = { + "fill-and-stroke-alpha-add", + "Use a group to fill/stroke a path (each with different alpha) using DEST_OUT and ADD to combine", + 2 * SIZE + 4 * PAD, SIZE + 2 * PAD +}; + +typedef void (*path_func_t) (cairo_t *cr); + +static void +rectangle (cairo_t *cr) +{ + cairo_rectangle (cr, PAD, PAD, SIZE, SIZE); +} + +static void +circle (cairo_t *cr) +{ + cairo_arc (cr, + PAD + SIZE / 2, PAD + SIZE / 2, + SIZE / 2, + 0, 2 * M_PI); +} + +/* Given a path-generating function and two possibly translucent + * patterns, fill and stroke the path with the patterns (to an + * offscreen group), then blend the result into the destination. + */ +static void +fill_and_stroke (cairo_t *cr, + path_func_t path_func, + cairo_pattern_t *fill_pattern, + cairo_pattern_t *stroke_pattern) +{ + cairo_push_group (cr); + { + (path_func) (cr); + cairo_set_source (cr, fill_pattern); + cairo_fill_preserve (cr); + + /* Use DEST_OUT to subtract stroke from fill. */ + cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); + cairo_set_operator (cr, CAIRO_OPERATOR_DEST_OUT); + cairo_stroke_preserve (cr); + + /* Then use ADD to draw the stroke without a seam. */ + cairo_set_source (cr, stroke_pattern); + cairo_set_operator (cr, CAIRO_OPERATOR_ADD); + cairo_stroke (cr); + } + cairo_pop_group_to_source (cr); + cairo_paint (cr); +} + +static cairo_test_status_t +draw (cairo_t *cr, int width, int height) +{ + cairo_pattern_t *blue; + cairo_pattern_t *red; + + blue = cairo_pattern_create_rgba (0.0, 0.0, 1.0, 0.8); + red = cairo_pattern_create_rgba (1.0, 0.0, 0.0, 0.2); + + cairo_test_paint_checkered (cr); + + fill_and_stroke (cr, rectangle, blue, red); + + cairo_translate (cr, SIZE + 2 * PAD, 0); + + fill_and_stroke (cr, circle, red, blue); + + cairo_pattern_destroy (blue); + cairo_pattern_destroy (red); + + return CAIRO_TEST_SUCCESS; +} + +int +main (void) +{ + return cairo_test (&test, draw); +} |