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Diffstat (limited to 'libs/cairo-1.16.0/test/half-coverage.c')
| -rw-r--r-- | libs/cairo-1.16.0/test/half-coverage.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/libs/cairo-1.16.0/test/half-coverage.c b/libs/cairo-1.16.0/test/half-coverage.c new file mode 100644 index 0000000..38cafda --- /dev/null +++ b/libs/cairo-1.16.0/test/half-coverage.c @@ -0,0 +1,155 @@ +/* + * 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) |