diff options
Diffstat (limited to 'libs/cairo-1.16.0/test/line-width-overlap.c')
| -rw-r--r-- | libs/cairo-1.16.0/test/line-width-overlap.c | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/libs/cairo-1.16.0/test/line-width-overlap.c b/libs/cairo-1.16.0/test/line-width-overlap.c new file mode 100644 index 0000000..ac8c234 --- /dev/null +++ b/libs/cairo-1.16.0/test/line-width-overlap.c @@ -0,0 +1,149 @@ +/* -*- Mode: c; c-basic-offset: 4; indent-tabs-mode: t; tab-width: 8; -*- */ +/* + * Copyright 2011 Red Hat Inc. + * + * 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: Benjamin Otte <otte@redhat.com> + */ + +/* + * Test case taken from the WebKit test suite, failure originally reported + * by Zan Dobersek <zandobersek@gmail.com>. WebKit test is + * LayoutTests/canvas/philip/tests/2d.path.rect.selfintersect.html + */ + +#include "cairo-test.h" + +#include <math.h> + +#define LINE_WIDTH 60 +#define SIZE 100 +#define RECT_SIZE 10 + +static cairo_test_status_t +draw (cairo_t *cr, int width, int height) +{ + /* fill with green so RGB and RGBA tests can share the ref image */ + cairo_set_source_rgb (cr, 0, 1, 0); + cairo_paint (cr); + + /* red to see eventual bugs immediately */ + cairo_set_source_rgb (cr, 1, 0, 0); + + /* big line width */ + cairo_set_line_width (cr, LINE_WIDTH); + + /* rectangle that is smaller than the line width in center of image */ + cairo_rectangle (cr, + (SIZE - RECT_SIZE) / 2, + (SIZE - RECT_SIZE) / 2, + RECT_SIZE, + RECT_SIZE); + + cairo_stroke (cr); + + return CAIRO_TEST_SUCCESS; +} + +/* and again slightly offset to trigger another path */ +static cairo_test_status_t +draw_offset (cairo_t *cr, int width, int height) +{ + cairo_translate (cr, .5, .5); + return draw (cr, width, height); +} + +static cairo_test_status_t +draw_rotated (cairo_t *cr, int width, int height) +{ + cairo_translate (cr, SIZE/2, SIZE/2); + cairo_rotate (cr, M_PI/4); + cairo_translate (cr, -SIZE/2, -SIZE/2); + + return draw (cr, width, height); +} + +static cairo_test_status_t +draw_flipped (cairo_t *cr, int width, int height) +{ + cairo_translate (cr, SIZE/2, SIZE/2); + cairo_scale (cr, -1, 1); + cairo_translate (cr, -SIZE/2, -SIZE/2); + + return draw (cr, width, height); +} + +static cairo_test_status_t +draw_flopped (cairo_t *cr, int width, int height) +{ + cairo_translate (cr, SIZE/2, SIZE/2); + cairo_scale (cr, 1, -1); + cairo_translate (cr, -SIZE/2, -SIZE/2); + + return draw (cr, width, height); +} + +static cairo_test_status_t +draw_dashed (cairo_t *cr, int width, int height) +{ + const double dashes[] = { 4 }; + cairo_set_dash (cr, dashes, 1, 0); + cairo_set_line_cap (cr, CAIRO_LINE_CAP_BUTT); + return draw (cr, width, height); +} + +CAIRO_TEST (line_width_overlap, + "Test overlapping lines due to large line width", + "stroke", /* keywords */ + NULL, /* requirements */ + SIZE, SIZE, + NULL, draw) +CAIRO_TEST (line_width_overlap_offset, + "Test overlapping lines due to large line width", + "stroke", /* keywords */ + NULL, /* requirements */ + SIZE, SIZE, + NULL, draw_offset) +CAIRO_TEST (line_width_overlap_rotated, + "Test overlapping lines due to large line width", + "stroke", /* keywords */ + NULL, /* requirements */ + SIZE, SIZE, + NULL, draw_rotated) +CAIRO_TEST (line_width_overlap_flipped, + "Test overlapping lines due to large line width", + "stroke", /* keywords */ + NULL, /* requirements */ + SIZE, SIZE, + NULL, draw_flipped) +CAIRO_TEST (line_width_overlap_flopped, + "Test overlapping lines due to large line width", + "stroke", /* keywords */ + NULL, /* requirements */ + SIZE, SIZE, + NULL, draw_flopped) +CAIRO_TEST (line_width_overlap_dashed, + "Test overlapping lines due to large line width", + "stroke", /* keywords */ + NULL, /* requirements */ + SIZE, SIZE, + NULL, draw_dashed) |