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/*
* Copyright 2009 Andrea Canciani
*
* 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
* Andrea Canciani not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior
* permission. Andrea Canciani makes no representations about the
* suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* ANDREA CANCIANI DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL ANDREA CANCIANI 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: Andrea Canciani <ranma42@gmail.com>
*/
#include "cairo-test.h"
#define N_OPERATORS (CAIRO_OPERATOR_SATURATE + 1)
#define HEIGHT 16
#define WIDTH 16
#define PAD 3
static cairo_pattern_t*
_create_pattern (cairo_surface_t *target, cairo_content_t content, int width, int height)
{
cairo_pattern_t *pattern;
cairo_surface_t *surface;
cairo_t *cr;
surface = cairo_surface_create_similar (target, content, width, height);
cr = cairo_create (surface);
cairo_surface_destroy (surface);
cairo_set_source_rgb (cr, 1, 0, 0);
cairo_arc (cr, 0.5 * width, 0.5 * height, 0.45 * height, -M_PI / 4, 3 * M_PI / 4);
cairo_fill (cr);
pattern = cairo_pattern_create_for_surface (cairo_get_target (cr));
cairo_destroy (cr);
return pattern;
}
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
cairo_pattern_t *alpha_pattern, *color_alpha_pattern, *pattern;
unsigned int n, i;
alpha_pattern = _create_pattern (cairo_get_target (cr),
CAIRO_CONTENT_ALPHA,
0.9 * WIDTH, 0.9 * HEIGHT);
color_alpha_pattern = _create_pattern (cairo_get_target (cr),
CAIRO_CONTENT_COLOR_ALPHA,
0.9 * WIDTH, 0.9 * HEIGHT);
pattern = cairo_pattern_create_linear (WIDTH, 0, 0, HEIGHT);
cairo_pattern_add_color_stop_rgba (pattern, 0.2, 0, 0, 1, 1);
cairo_pattern_add_color_stop_rgba (pattern, 0.8, 0, 0, 1, 0);
cairo_translate (cr, PAD, PAD);
for (n = 0; n < N_OPERATORS; n++) {
cairo_save (cr);
for (i = 0; i < 4; i++) {
cairo_reset_clip (cr);
cairo_rectangle (cr, 0, 0, WIDTH, HEIGHT);
cairo_clip (cr);
cairo_set_source (cr, pattern);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
if (i & 2) {
cairo_paint (cr);
} else {
cairo_rectangle (cr, WIDTH/2, HEIGHT/2, WIDTH, HEIGHT);
cairo_fill (cr);
}
cairo_set_source (cr, i & 1 ? alpha_pattern : color_alpha_pattern);
cairo_set_operator (cr, n);
if (i & 2) {
cairo_paint (cr);
} else {
cairo_rectangle (cr, WIDTH/2, HEIGHT/2, WIDTH, HEIGHT);
cairo_fill (cr);
}
cairo_translate (cr, 0, HEIGHT+PAD);
}
cairo_restore (cr);
cairo_translate (cr, WIDTH+PAD, 0);
}
cairo_pattern_destroy (pattern);
cairo_pattern_destroy (alpha_pattern);
cairo_pattern_destroy (color_alpha_pattern);
return CAIRO_TEST_SUCCESS;
}
CAIRO_TEST (surface_pattern_operator,
"Tests alpha-only and alpha-color sources with all operators",
"surface, pattern, operator", /* keywords */
NULL, /* requirements */
(WIDTH+PAD) * N_OPERATORS + PAD, 4*HEIGHT + 5*PAD,
NULL, draw)
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