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/*
* Copyright © 2011 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Author: Chris Wilson <chris@chris-wilson.co.uk>
*/
#include "cairo-test.h"
#define STEP 5
#define WIDTH 100
#define HEIGHT 100
static void diamond (cairo_t *cr)
{
cairo_move_to (cr, WIDTH/2, 0);
cairo_line_to (cr, WIDTH, HEIGHT/2);
cairo_line_to (cr, WIDTH/2, HEIGHT);
cairo_line_to (cr, 0, HEIGHT/2);
cairo_close_path (cr);
}
static void background (cairo_t *cr)
{
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
cairo_set_source_rgb (cr, 1,1,1);
cairo_paint (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
cairo_set_source_rgb (cr, 0,0,0);
}
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
background (cr);
/* completely overlapping diamonds */
cairo_save (cr);
diamond (cr);
cairo_clip (cr);
diamond (cr);
cairo_clip (cr);
cairo_paint (cr);
cairo_restore (cr);
cairo_translate (cr, WIDTH, 0);
/* partial overlap */
cairo_save (cr);
cairo_translate (cr, -WIDTH/4, 0);
diamond (cr);
cairo_clip (cr);
cairo_translate (cr, WIDTH/2, 0);
diamond (cr);
cairo_clip (cr);
cairo_paint (cr);
cairo_restore (cr);
cairo_translate (cr, WIDTH, 0);
/* no overlap, but the bounding boxes must */
cairo_save (cr);
cairo_translate (cr, -WIDTH/2 + 2, -2);
diamond (cr);
cairo_clip (cr);
cairo_translate (cr, WIDTH - 4, 4);
diamond (cr);
cairo_clip (cr);
cairo_paint (cr);
cairo_restore (cr);
cairo_translate (cr, WIDTH, 0);
/* completely disjoint */
cairo_save (cr);
cairo_translate (cr, -WIDTH/2 - 1, 0);
diamond (cr);
cairo_clip (cr);
cairo_translate (cr, WIDTH + 2, 0);
diamond (cr);
cairo_clip (cr);
cairo_paint (cr);
cairo_restore (cr);
return CAIRO_TEST_SUCCESS;
}
CAIRO_TEST (clip_polygons,
"Test drawing through through an intersection of polygons",
"clip", /* keywords */
"target=raster", /* requirements */
4*WIDTH, HEIGHT,
NULL, draw)