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436c0c8be2
In order to run under memfault, the framework is first extended to handle running concurrent tests - i.e. multi-threading. (Not that this is a requirement for memfault, instead it shares a common goal of storing per-test data). To that end all the global data is moved into a per-test context and the targets are adjusted to avoid overlap on shared, global resources (such as output files and frame buffers). In order to preserve the simplicity of the standard draw routines, the context is not passed explicitly as a parameter to the routines, but is instead attached to the cairo_t via the user_data. For the masochist, to enable the tests to be run across multiple threads simply set the environment variable CAIRO_TEST_NUM_THREADS to the desired number. In the long run, we can hope the need for memfault (runtime testing of error paths) will be mitigated by static analysis. A promising candidate for this task would appear to be http://hal.cs.berkeley.edu/cil/.
83 lines
2.4 KiB
C
83 lines
2.4 KiB
C
/*
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* Copyright © 2006 M Joonas Pihlaja
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Author: M Joonas Pihlaja <jpihlaja@cc.helsinki.fi>
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*/
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#include "cairo-test.h"
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static cairo_test_draw_function_t draw;
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#define SIZE 512
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#define NUM_SEGMENTS 128
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static const cairo_test_t test = {
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"random-intersections",
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"Tests the tessellator trapezoid generation and intersection computation",
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SIZE+3, SIZE+3,
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draw
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};
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static uint32_t state;
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static double
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uniform_random (double minval, double maxval)
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{
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static uint32_t const poly = 0x9a795537U;
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uint32_t n = 32;
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while (n-->0)
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state = 2*state < state ? (2*state ^ poly) : 2*state;
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return minval + state * (maxval - minval) / 4294967296.0;
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}
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static cairo_test_status_t
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draw (cairo_t *cr, int width, int height)
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{
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int i;
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cairo_set_source_rgb (cr, 0, 0, 0);
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cairo_paint (cr);
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state = 0x12345678;
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cairo_translate (cr, 1, 1);
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cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);
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cairo_move_to (cr, 0, 0);
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for (i = 0; i < NUM_SEGMENTS; i++) {
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double x = uniform_random (0, width);
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double y = uniform_random (0, height);
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cairo_line_to (cr, x, y);
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}
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cairo_close_path (cr);
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cairo_set_source_rgb (cr, 1, 0, 0);
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cairo_fill_preserve (cr);
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cairo_set_source_rgb (cr, 0, 1, 0);
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cairo_set_line_width (cr, 0.5);
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cairo_stroke (cr);
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return CAIRO_TEST_SUCCESS;
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}
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int
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main (void)
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{
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return cairo_test (&test);
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}
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