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/*
* Copyright 2010 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"
/* Test the fidelity of the rasterisation, because Cairo is my favourite
* driver test suite.
*/
#define SIZE 256
#define WIDTH 2
#define HEIGHT 10
static cairo_test_status_t
rectangles (cairo_t *cr, int width, int height)
{
int i;
cairo_set_source_rgb (cr, 1.0, 0.0, 0.0);
cairo_paint (cr);
cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
for (i = 1; i <= SIZE; i++) {
int x, y;
cairo_save (cr);
cairo_rectangle (cr, 0, 0, WIDTH, HEIGHT);
cairo_clip (cr);
cairo_scale (cr, 1./SIZE, 1./SIZE);
for (x = -i; x < SIZE*WIDTH; x += 2*i) {
for (y = -i; y < SIZE*HEIGHT; y += 2*i) {
/* Add a little tile composed of two non-overlapping squares
* +--+
* | |
* |__|__
* | |
* | |
* +--+
*/
cairo_rectangle (cr, x, y, i, i);
cairo_rectangle (cr, x+i, y+i, i, i);
}
}
cairo_fill (cr);
cairo_restore (cr);
cairo_translate (cr, WIDTH, 0);
}
return CAIRO_TEST_SUCCESS;
}
static cairo_test_status_t
triangles (cairo_t *cr, int width, int height)
{
int i;
cairo_set_source_rgb (cr, 1.0, 0.0, 0.0);
cairo_paint (cr);
cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
for (i = 1; i <= SIZE; i++) {
int x, y;
cairo_save (cr);
cairo_rectangle (cr, 0, 0, WIDTH, HEIGHT);
cairo_clip (cr);
cairo_scale (cr, 1./SIZE, 1./SIZE);
for (x = -i; x < SIZE*WIDTH; x += 2*i) {
for (y = -i; y < SIZE*HEIGHT; y += 2*i) {
/* Add a tile composed of four non-overlapping
* triangles. The plus and minus signs inside the
* triangles denote the orientation of the triangle's
* edges: + for clockwise and - for anticlockwise.
*
* +-----+
* \-|+/
* \|/
* /|\
* /-|-\
* +-----+
*/
/* top left triangle */
cairo_move_to (cr, x, y);
cairo_line_to (cr, x+i, y+i);
cairo_line_to (cr, x+i, y);
cairo_close_path (cr);
/* top right triangle */
cairo_move_to (cr, x+i, y);
cairo_line_to (cr, x+2*i, y);
cairo_line_to (cr, x+i, y+i);
cairo_close_path (cr);
/* bottom left triangle */
cairo_move_to (cr, x+i, y+i);
cairo_line_to (cr, x, y+2*i);
cairo_line_to (cr, x+i, y+2*i);
cairo_close_path (cr);
/* bottom right triangle */
cairo_move_to (cr, x+i, y+i);
cairo_line_to (cr, x+i, y+2*i);
cairo_line_to (cr, x+2*i, y+2*i);
cairo_close_path (cr);
}
}
cairo_fill (cr);
cairo_restore (cr);
cairo_translate (cr, WIDTH, 0);
}
return CAIRO_TEST_SUCCESS;
}
CAIRO_TEST (half_coverage_rectangles,
"Check the fidelity of the rasterisation.",
NULL, /* keywords */
"target=raster slow", /* requirements */
WIDTH * SIZE, HEIGHT,
NULL, rectangles)
CAIRO_TEST (half_coverage_triangles,
"Check the fidelity of the rasterisation.",
NULL, /* keywords */
"target=raster slow", /* requirements */
WIDTH * SIZE, HEIGHT,
NULL, triangles)
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