diff options
author | sanine <sanine.not@pm.me> | 2022-10-12 12:03:23 -0500 |
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committer | sanine <sanine.not@pm.me> | 2022-10-12 12:03:23 -0500 |
commit | 530ffd0b7d3c39757b20f00716e486b5caf89aff (patch) | |
tree | 76b35fdf57317038acf6b828871f6ae25fce2ebe /libs/cairo-1.16.0/test/caps-tails-curve.c | |
parent | 3dbe9332e47c143a237db12440f134caebd1cfbe (diff) |
add cairo
Diffstat (limited to 'libs/cairo-1.16.0/test/caps-tails-curve.c')
-rw-r--r-- | libs/cairo-1.16.0/test/caps-tails-curve.c | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/libs/cairo-1.16.0/test/caps-tails-curve.c b/libs/cairo-1.16.0/test/caps-tails-curve.c new file mode 100644 index 0000000..fa6aded --- /dev/null +++ b/libs/cairo-1.16.0/test/caps-tails-curve.c @@ -0,0 +1,127 @@ +/* + * Copyright © 2011 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. + * + * Author: Chris Wilson <chris@chris-wilson.co.uk> + */ + +#include "cairo-test.h" + +#define LINE_WIDTH 30. +#define SIZE (2 * LINE_WIDTH) +#define PAD (2 * LINE_WIDTH) + +static void +make_path (cairo_t *cr, double theta) +{ + double line_width = cairo_get_line_width (cr) / 4; + + cairo_move_to (cr, 0, 0); + cairo_rel_curve_to (cr, + SIZE/3, -SIZE/4, + SIZE/3, -SIZE/4, + SIZE, 0); + + cairo_rel_line_to (cr, + cos (theta) * line_width, + sin (theta) * line_width); +} + +static void +draw_joins (cairo_t *cr, double theta) +{ + make_path (cr, theta); + cairo_set_line_join (cr, CAIRO_LINE_JOIN_BEVEL); + cairo_stroke (cr); + + cairo_translate (cr, SIZE + PAD, 0.); + + make_path (cr, theta); + cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND); + cairo_stroke (cr); + + cairo_translate (cr, SIZE + PAD, 0.); + + make_path (cr, theta); + cairo_set_line_join (cr, CAIRO_LINE_JOIN_MITER); + cairo_stroke (cr); + + cairo_translate (cr, SIZE + PAD, 0.); +} + +static void +draw_caps_joins (cairo_t *cr, double theta) +{ + cairo_translate (cr, PAD, 0); + cairo_set_line_cap (cr, CAIRO_LINE_CAP_BUTT); + draw_joins (cr, theta); + + cairo_translate (cr, PAD, 0); + cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND); + draw_joins (cr, theta); + + cairo_translate (cr, PAD, 0); + cairo_set_line_cap (cr, CAIRO_LINE_CAP_SQUARE); + draw_joins (cr, theta); +} + +static cairo_test_status_t +draw (cairo_t *cr, int width, int height) +{ + const double theta[] = { + -M_PI/2, -M_PI/4, 0, M_PI/8, M_PI/3, M_PI + }; + unsigned int t; + + /* We draw in the default black, so paint white first. */ + cairo_save (cr); + cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); /* white */ + cairo_paint (cr); + cairo_restore (cr); + + cairo_set_line_width (cr, LINE_WIDTH); + + for (t = 0; t < ARRAY_LENGTH(theta); t++) { + cairo_save (cr); + cairo_translate (cr, 0, t * (SIZE + PAD) + PAD); + draw_caps_joins (cr, theta[t]); + cairo_restore (cr); + + cairo_save (cr); + /* and reflect to generate the opposite vertex ordering */ + cairo_translate (cr, 0, height - t * (SIZE + PAD) - PAD); + cairo_scale (cr, 1, -1); + draw_caps_joins (cr, theta[t]); + cairo_restore (cr); + } + + return CAIRO_TEST_SUCCESS; +} + +CAIRO_TEST (caps_tails_curve, + "Test caps and joins on short tail segments", + "stroke, cap, join", /* keywords */ + NULL, /* requirements */ + 9 * (PAD + SIZE) + 4*PAD, + 12 * (PAD + SIZE) + PAD, + NULL, draw) + |