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https://gitlab.freedesktop.org/cairo/cairo.git
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e90073f7dd
Avoid calling libtool to link every single test case, by building just one binary from all the sources. This binary is then given the task of choosing tests to run (based on user selection and individual test requirement), forking each test into its own process and accumulating the results.
118 lines
3.2 KiB
C
118 lines
3.2 KiB
C
/*
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* Copyright © 2007 Red Hat, Inc.
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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: Carl Worth <cworth@cworth.org>
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*/
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#include "cairo-test.h"
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/* This test case is designed to exercise the following bug:
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*
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* Skew transforms were broken by the cairo update in December
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* https://bugzilla.mozilla.org/show_bug.cgi?id=373632
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*
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* What's happening is that the rectangle is being skewed into the
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* following shape:
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*
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* a__b
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* \ \
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* \ \
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* \ \
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* \ \
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* \ \
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* d\_\c
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*
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* and the bug is that _cairo_traps_tessellate_convex_quad is
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* comparing b.x as less then d.x and therfore determining that the bc
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* edge is left of the ad edge. The fix is simply to compare c.x to
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* d.x instead of b.x to d.x .
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*/
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#define PAD 2
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#define LINE_WIDTH 10
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#define LINE_LENGTH (2 * LINE_WIDTH)
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#define SKEW_FACTOR 5.0
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#define WIDTH (PAD + (LINE_LENGTH * SKEW_FACTOR) + LINE_WIDTH + PAD)
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#define HEIGHT (PAD + LINE_WIDTH + (LINE_LENGTH * SKEW_FACTOR) + LINE_WIDTH + PAD)
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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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/* We draw in the default black, so paint white first. */
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cairo_save (cr);
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cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); /* white */
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cairo_paint (cr);
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cairo_restore (cr);
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cairo_translate (cr, PAD, PAD);
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cairo_set_line_width (cr, LINE_WIDTH);
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cairo_set_line_cap (cr, CAIRO_LINE_CAP_BUTT);
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cairo_save (cr);
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{
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cairo_matrix_t skew_x = {
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1.0, 0.0,
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SKEW_FACTOR, 1.0,
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0.0, 0.0
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};
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cairo_translate (cr, LINE_WIDTH / 2.0, 0.0);
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cairo_transform (cr, &skew_x);
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cairo_move_to (cr, 0.0, 0.0);
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cairo_line_to (cr, 0.0, LINE_LENGTH);
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cairo_stroke (cr);
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}
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cairo_restore (cr);
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cairo_translate (cr, 0.0, LINE_WIDTH);
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cairo_save (cr);
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{
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cairo_matrix_t skew_y = {
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1.0, SKEW_FACTOR,
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0.0, 1.0,
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0.0, 0.0
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};
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cairo_translate (cr, 0.0, LINE_WIDTH / 2.0);
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cairo_transform (cr, &skew_y);
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cairo_move_to (cr, 0.0, 0.0);
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cairo_line_to (cr, LINE_LENGTH, 0.0);
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cairo_stroke (cr);
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}
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cairo_restore (cr);
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return CAIRO_TEST_SUCCESS;
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}
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CAIRO_TEST (skew_extreme,
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"Test cases of extreme skew.",
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"transform, stroke", /* keywords */
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NULL, /* requirements */
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WIDTH, HEIGHT,
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NULL, draw)
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