blob: ca3f2c6afa204b199b5abcbb8f7940e37ab9c00a [file] [log] [blame]
/*
* 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 hatching (cairo_t *cr)
{
int i;
cairo_rectangle (cr, 0, 0, WIDTH, HEIGHT);
cairo_clip (cr);
for (i = 0; i < WIDTH; i += STEP) {
cairo_rectangle (cr, i-1, -2, 2, HEIGHT+4);
cairo_rectangle (cr, -2, i-1, WIDTH+4, 2);
}
}
static void background (cairo_t *cr)
{
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
cairo_set_source_rgb (cr, 1,1,1);
cairo_paint (cr);
}
static void clip_to_quadrant (cairo_t *cr)
{
cairo_rectangle (cr, 0, 0, WIDTH, HEIGHT);
cairo_clip (cr);
}
static void draw_hatching (cairo_t *cr, void (*func) (cairo_t *))
{
cairo_save (cr); {
clip_to_quadrant (cr);
hatching (cr);
func (cr);
} cairo_restore (cr);
cairo_translate (cr, WIDTH, 0);
cairo_save (cr); {
clip_to_quadrant (cr);
cairo_translate (cr, 0.25, 0.25);
hatching (cr);
func (cr);
} cairo_restore (cr);
cairo_translate (cr, WIDTH, 0);
cairo_save (cr); {
clip_to_quadrant (cr);
cairo_translate (cr, WIDTH/2, HEIGHT/2);
cairo_rotate (cr, M_PI/4);
cairo_translate (cr, -WIDTH/2, -HEIGHT/2);
hatching (cr);
func (cr);
} cairo_restore (cr);
cairo_translate (cr, WIDTH, 0);
}
static void do_clip (cairo_t *cr)
{
cairo_clip (cr);
cairo_paint (cr);
}
static void do_clip_alpha (cairo_t *cr)
{
cairo_clip (cr);
cairo_paint_with_alpha (cr, .5);
}
static void hatchings (cairo_t *cr, void (*func) (cairo_t *))
{
cairo_save (cr); {
cairo_set_source_rgb(cr, 1, 0, 0);
cairo_set_antialias (cr, CAIRO_ANTIALIAS_DEFAULT);
draw_hatching (cr, func);
cairo_set_source_rgb(cr, 0, 0, 1);
cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
draw_hatching (cr, func);
} cairo_restore (cr);
}
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
background (cr);
/* aligned, misaligned, diagonal; mono repeat
* x fill
* x clip; paint
* x clip; paint-alpha
* repeated, for over/source
*/
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
hatchings (cr, cairo_fill);
cairo_translate (cr, 0, HEIGHT);
hatchings (cr, do_clip);
cairo_translate (cr, 0, HEIGHT);
hatchings (cr, do_clip_alpha);
cairo_translate (cr, 0, HEIGHT);
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
hatchings (cr, cairo_fill);
cairo_translate (cr, 0, HEIGHT);
hatchings (cr, do_clip);
cairo_translate (cr, 0, HEIGHT);
hatchings (cr, do_clip_alpha);
cairo_translate (cr, 0, HEIGHT);
return CAIRO_TEST_SUCCESS;
}
CAIRO_TEST (hatchings,
"Test drawing through various aligned/unaliged clips",
"clip, alpha", /* keywords */
"target=raster", /* requirements */
6*WIDTH, 6*HEIGHT,
NULL, draw)