| /* |
| * 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) |