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/* cc `pkg-config --cflags --libs cairo` cairo-spline-image.c -o cairo-spline-image */
/* Copyright © 2005 Carl Worth
* Copyright © 2012 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.
*/
#include "cairo-test.h"
#define WIDE_LINE_WIDTH 160
#define NARROW_LINE_WIDTH 2
/* A spline showing bugs in the "contour-based stroking" in cairo 1.12 */
static const struct spline {
struct { double x, y; } pt[5];
double line_width;
double rgba[4];
} splines[] = {
{
{
{ 172.25, 156.185 },
{ 177.225, 164.06 },
{ 176.5, 157.5 },
{ 175.5, 159.5 },
},
WIDE_LINE_WIDTH,
{ 1, 1, 1, 1 },
},
{
{
{ 571.25, 247.185 },
{ 78.225, 224.06 },
{ 129.5, 312.5 },
{ 210.5, 224.5 },
},
NARROW_LINE_WIDTH,
{ 1, 0, 0, 1 },
}
};
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
unsigned n;
cairo_set_source_rgb (cr, 0, 0, 0);
cairo_paint (cr);
cairo_set_line_cap(cr, CAIRO_LINE_CAP_SQUARE);
for (n = 0; n < ARRAY_LENGTH(splines); n++) {
cairo_set_line_width (cr, splines[n].line_width);
cairo_set_source_rgba (cr,
splines[n].rgba[0],
splines[n].rgba[1],
splines[n].rgba[2],
splines[n].rgba[3]);
cairo_move_to (cr, splines[n].pt[0].x, splines[n].pt[0].y);
cairo_curve_to (cr,
splines[n].pt[1].x, splines[n].pt[1].y,
splines[n].pt[2].x, splines[n].pt[2].y,
splines[n].pt[3].x, splines[n].pt[3].y);
cairo_stroke (cr);
}
return CAIRO_TEST_SUCCESS;
}
CAIRO_TEST (bug_spline,
"Exercises a bug in the stroking of splines",
"spline, stroke", /* keywords */
NULL, /* requirements */
300, 300,
NULL, draw)
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