From 530ffd0b7d3c39757b20f00716e486b5caf89aff Mon Sep 17 00:00:00 2001 From: sanine Date: Wed, 12 Oct 2022 12:03:23 -0500 Subject: add cairo --- libs/cairo-1.16.0/test/random-intersections-eo.c | 78 ++++++++++++++++++++++++ 1 file changed, 78 insertions(+) create mode 100644 libs/cairo-1.16.0/test/random-intersections-eo.c (limited to 'libs/cairo-1.16.0/test/random-intersections-eo.c') diff --git a/libs/cairo-1.16.0/test/random-intersections-eo.c b/libs/cairo-1.16.0/test/random-intersections-eo.c new file mode 100644 index 0000000..d35894f --- /dev/null +++ b/libs/cairo-1.16.0/test/random-intersections-eo.c @@ -0,0 +1,78 @@ +/* + * Copyright © 2006 M Joonas Pihlaja + * + * 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: M Joonas Pihlaja + */ +#include "cairo-test.h" + +#define SIZE 512 +#define NUM_SEGMENTS 128 + +static uint32_t state; + +static double +uniform_random (double minval, double maxval) +{ + static uint32_t const poly = 0x9a795537U; + uint32_t n = 32; + while (n-->0) + state = 2*state < state ? (2*state ^ poly) : 2*state; + return minval + state * (maxval - minval) / 4294967296.0; +} + +static cairo_test_status_t +draw (cairo_t *cr, int width, int height) +{ + int i; + + cairo_set_source_rgb (cr, 0, 0, 0); + cairo_paint (cr); + + state = 0x12345678; + cairo_translate (cr, 1, 1); + cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD); + + cairo_move_to (cr, 0, 0); + for (i = 0; i < NUM_SEGMENTS; i++) { + double x = uniform_random (0, width); + double y = uniform_random (0, height); + cairo_line_to (cr, x, y); + } + cairo_close_path (cr); + + cairo_set_source_rgb (cr, 1, 0, 0); + cairo_fill_preserve (cr); + cairo_set_source_rgb (cr, 0, 1, 0); + cairo_set_line_width (cr, 0.5); + cairo_stroke (cr); + + return CAIRO_TEST_SUCCESS; +} + +CAIRO_TEST (random_intersections_eo, + "Tests the tessellator trapezoid generation and intersection computation", + "trap", /* keywords */ + NULL, /* requirements */ + SIZE+3, SIZE+3, + NULL, draw) + -- cgit v1.2.1