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/*
* 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"
static cairo_test_draw_function_t draw;
cairo_test_t test = {
"smask",
"Test the support of \"soft\" masks",
60, 60,
draw
};
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
static uint32_t data[] = {
0x80000000, 0x80000000,
0x80000000, 0x80000000,
};
cairo_surface_t *mask, *mask2;
cairo_pattern_t *pattern;
cairo_t *cr2;
cairo_text_extents_t extents;
mask = cairo_surface_create_similar (cairo_get_group_target (cr),
CAIRO_CONTENT_ALPHA,
width, height);
cr2 = cairo_create (mask);
cairo_save (cr2); {
cairo_set_operator (cr2, CAIRO_OPERATOR_CLEAR);
cairo_paint (cr2);
} cairo_restore (cr2);
pattern = cairo_pattern_create_linear (0, 0, 0, height);
cairo_pattern_add_color_stop_rgba (pattern, 0.00, 0., 0., 0., 0.0);
cairo_pattern_add_color_stop_rgba (pattern, 0.80, 0., 0., 0., 0.0);
cairo_pattern_add_color_stop_rgba (pattern, 0.90, 1., 1., 1., 0.25);
cairo_pattern_add_color_stop_rgba (pattern, 1.00, 1., 1., 1., 1.0);
cairo_set_source (cr2, pattern);
cairo_pattern_destroy (pattern);
cairo_paint (cr2);
pattern = cairo_pattern_create_linear (0, 0, width, height);
cairo_pattern_add_color_stop_rgba (pattern, 0.00, 0., 0., 0., 0.);
cairo_pattern_add_color_stop_rgba (pattern, 0.25, 1., 1., 1., 1.);
cairo_pattern_add_color_stop_rgba (pattern, 0.50, 1., 1., 1., .5);
cairo_pattern_add_color_stop_rgba (pattern, 0.75, 1., 1., 1., 1.);
cairo_pattern_add_color_stop_rgba (pattern, 1.00, 0., 0., 0., 0.);
cairo_set_source (cr2, pattern);
cairo_pattern_destroy (pattern);
mask2 = cairo_image_surface_create_for_data ((unsigned char *) data,
CAIRO_FORMAT_ARGB32, 2, 2, 8);
pattern = cairo_pattern_create_for_surface (mask2);
cairo_surface_destroy (mask2);
cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);
cairo_mask (cr2, pattern);
cairo_pattern_destroy (pattern);
cairo_arc (cr2, 0.5 * width, 0.5 * height - 10, 0.2 * height, 0, 2 * M_PI);
cairo_fill (cr2);
cairo_arc (cr2, 0.5 * width, 0.5 * height - 10, 0.25 * height, 0, 2 * M_PI);
cairo_stroke (cr2);
cairo_select_font_face (cr2,
"Bitstream Vera Sans",
CAIRO_FONT_SLANT_NORMAL,
CAIRO_FONT_WEIGHT_NORMAL);
cairo_set_font_size (cr2, 0.3 * height);
cairo_text_extents (cr2, "FG", &extents);
cairo_move_to (cr2,
floor ((width - extents.width) / 2 + 0.5) - extents.x_bearing,
floor (height - extents.height - 0.5) - extents.y_bearing - 5);
cairo_show_text (cr2, "FG");
cairo_destroy (cr2);
cairo_set_source_rgb (cr, 0, 0, 1.0);
cairo_paint (cr);
pattern = cairo_pattern_create_radial (
0.5 * width, 0.5 * height, 0,
0.5 * width, 0.5 * height, 0.5 *height);
cairo_pattern_add_color_stop_rgba (pattern, 0.00, 0., 0., 0., 0.);
cairo_pattern_add_color_stop_rgba (pattern, 0.25, 1., 0., 0., 1.);
cairo_pattern_add_color_stop_rgba (pattern, 0.50, 1., 0., 0., .5);
cairo_pattern_add_color_stop_rgba (pattern, 1.00, 1., 0., 0., 1.);
cairo_set_source (cr, pattern);
cairo_pattern_destroy (pattern);
cairo_mask_surface (cr, mask, 0, 0);
cairo_surface_destroy (mask);
return CAIRO_TEST_SUCCESS;
}
int
main (void)
{
return cairo_test (&test);
}
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