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[test] Add reflected-stroke to exercise stroking with a reflected ctm.

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Parts of the stroker depend upon whether we have in effect a reflection
matrix (one whose determinant < 0). This test incopororates the same
drawing under the a couple of reflections to exercise stroking under
matrices with both positive and negative determinants.
This commit is contained in:
Chris Wilson 2008-02-26 14:14:38 +00:00
parent 76f0613e5f
commit 65a8a27943
4 changed files with 103 additions and 0 deletions
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1
test/.gitignore vendored
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@ -140,6 +140,7 @@ pthread-show-text
rectangle-rounding-error
rectilinear-miter-limit
rectilinear-stroke
reflected-stroke
rel-path
rotate-image-surface-paint
scale-down-source-surface-paint

2
test/Makefile.am
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@ -101,6 +101,7 @@ random-intersections$(EXEEXT) \
rectangle-rounding-error$(EXEEXT) \
rectilinear-miter-limit$(EXEEXT) \
rectilinear-stroke$(EXEEXT) \
reflected-stroke$(EXEEXT) \
rel-path$(EXEEXT) \
rgb24-ignore-alpha$(EXEEXT) \
rotate-image-surface-paint$(EXEEXT) \
@ -472,6 +473,7 @@ REFERENCE_IMAGES = \
rectangle-rounding-error-ref.png \
rectilinear-miter-limit-ref.png \
rectilinear-stroke-ref.png \
reflected-stroke-ref.png \
rel-path-quartz-ref.png \
rel-path-quartz-rgb24-ref.png \
rel-path-ps-rgb24-ref.png \

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100
test/reflected-stroke.c Normal file
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@ -0,0 +1,100 @@
/*
* Copyright © 2008 Chris Wilson
*
* Permission to use, copy, modify, distribute, and sell this software
* and its documentation for any purpose is hereby granted without
* fee, provided that the above copyright notice appear in all copies
* and that both that copyright notice and this permission notice
* appear in supporting documentation, and that the name of
* the author not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior
* permission. The author makes no representations about the
* suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL THE AUTHOR. BE LIABLE FOR ANY SPECIAL,
* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
* IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Author: Chris Wilson <chris@chris-wilson.co.uk>
*/
#include "cairo-test.h"
static cairo_test_draw_function_t draw;
cairo_test_t test = {
"reflected-stroke",
"Exercises the stroker with a reflected ctm",
200, 200,
draw
};
static void
draw_symbol (cairo_t *cr)
{
double dash[] = {6, 3};
cairo_rectangle (cr, -25, -25, 50, 50);
cairo_stroke (cr);
cairo_move_to (cr, 0, -25);
cairo_curve_to (cr, 12.5, -12.5, 12.5, -12.5, 0, 0);
cairo_curve_to (cr, -12.5, 12.5, -12.5, 12.5, 0, 25);
cairo_curve_to (cr, 12.5, 12.5, 12.5, 12.5, 0, 0);
cairo_stroke (cr);
cairo_save (cr);
cairo_set_dash (cr, dash, sizeof (dash) / sizeof (dash[0]), 0.);
cairo_move_to (cr, 0, 0);
cairo_arc (cr, 0, 0, 12.5, 0, 3 * M_PI / 2);
cairo_close_path (cr);
cairo_stroke (cr);
cairo_restore (cr);
}
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
cairo_set_source_rgb (cr, 1, 1, 1);
cairo_paint (cr);
cairo_set_source_rgb (cr, 0, 0, 0);
cairo_save (cr);
cairo_translate (cr, 50, 50);
cairo_scale (cr, 1, 1);
draw_symbol (cr);
cairo_restore (cr);
cairo_save (cr);
cairo_translate (cr, 150, 50);
cairo_scale (cr, -1, 1);
draw_symbol (cr);
cairo_restore (cr);
cairo_save (cr);
cairo_translate (cr, 150, 150);
cairo_scale (cr, -1, -1);
draw_symbol (cr);
cairo_restore (cr);
cairo_save (cr);
cairo_translate (cr, 50, 150);
cairo_scale (cr, 1, -1);
draw_symbol (cr);
cairo_restore (cr);
return CAIRO_TEST_SUCCESS;
}
int
main (void)
{
return cairo_test (&test);
}