diff options
Diffstat (limited to 'libs/cairo-1.16.0/test/big-little-triangle.c')
-rw-r--r-- | libs/cairo-1.16.0/test/big-little-triangle.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/libs/cairo-1.16.0/test/big-little-triangle.c b/libs/cairo-1.16.0/test/big-little-triangle.c new file mode 100644 index 0000000..27eb232 --- /dev/null +++ b/libs/cairo-1.16.0/test/big-little-triangle.c @@ -0,0 +1,76 @@ +/* + * 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> + */ + +/* + * A variation on + * + * https://bugzilla.mozilla.org/show_bug.cgi?id=668921 + * + * The issue is that we failed to tighten the initial approximated bounds + * after tessellating the path. + */ + +#include "cairo-test.h" + +#define SIZE 60 + +static void +triangle (cairo_t *cr, double x, double y, double h) +{ + cairo_move_to (cr, x, y); + cairo_line_to (cr, x+h/2, y+h); + cairo_line_to (cr, x+h, y); + cairo_close_path (cr); +} + +static cairo_test_status_t +draw (cairo_t *cr, int width, int height) +{ + cairo_set_source_rgb (cr, 1, 0, 1); + cairo_paint (cr); + + /* Set an unbounded operator so that we can see how accurate the bounded + * extents were. + */ + cairo_set_operator (cr, CAIRO_OPERATOR_IN); + cairo_set_source_rgb (cr, 1, 1, 1); + + /* Wind several triangles together that reduce to just one */ + cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD); + triangle (cr, 0, 0, SIZE); + triangle (cr, 0, 0, SIZE); + triangle (cr, SIZE/2-20, SIZE/2 - 20, 40); + cairo_fill (cr); + + return CAIRO_TEST_SUCCESS; +} + +CAIRO_TEST (big_little_triangle, + "Tests that we tighten the bounds after tessellation.", + "fill", /* keywords */ + NULL, /* requirements */ + SIZE, SIZE, + NULL, draw) |