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95 lines
2.9 KiB
C
95 lines
2.9 KiB
C
/*
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* Copyright © 2015 Adrian Johnson
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*
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* Permission to use, copy, modify, distribute, and sell this software
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* and its documentation for any purpose is hereby granted without
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* fee, provided that the above copyright notice appear in all copies
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* and that both that copyright notice and this permission notice
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* appear in supporting documentation, and that the name of
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* Red Hat, Inc. not be used in advertising or publicity pertaining to
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* distribution of the software without specific, written prior
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* permission. Red Hat, Inc. makes no representations about the
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* suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
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* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS, IN NO EVENT SHALL RED HAT, INC. BE LIABLE FOR ANY SPECIAL,
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* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
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* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
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* IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Author: Adrian Johnson <ajohnson@redneon.com>
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*/
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#include "cairo-test.h"
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#define CELL_WIDTH 20
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#define CELL_HEIGHT 20
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#define PAD 2
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#define IMAGE_WIDTH (CELL_WIDTH*3 + PAD*4)
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#define IMAGE_HEIGHT (CELL_HEIGHT*4 + PAD*5)
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static void
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draw_lines(cairo_t *cr)
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{
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/* horizontal line */
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cairo_translate (cr, PAD, PAD);
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cairo_move_to (cr, 0, CELL_HEIGHT/2);
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cairo_line_to (cr, CELL_WIDTH, CELL_HEIGHT/2);
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cairo_stroke (cr);
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/* vertical line */
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cairo_translate (cr, 0, CELL_HEIGHT + PAD);
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cairo_move_to (cr, CELL_WIDTH/2, 0);
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cairo_line_to (cr, CELL_WIDTH/2, CELL_HEIGHT);
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cairo_stroke (cr);
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/* diagonal line */
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cairo_translate (cr, 0, CELL_HEIGHT + PAD);
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cairo_move_to (cr, 0, CELL_HEIGHT);
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cairo_line_to (cr, CELL_WIDTH, 0);
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cairo_stroke (cr);
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/* curved line */
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cairo_translate (cr, 0, CELL_HEIGHT + PAD);
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cairo_move_to (cr, CELL_WIDTH, 0);
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cairo_curve_to (cr, 0, 0,
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CELL_WIDTH, CELL_HEIGHT,
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0, CELL_HEIGHT);
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cairo_stroke (cr);
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}
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#define FIXED_POINT_MIN (1.0/256)
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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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cairo_save (cr);
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cairo_set_line_width (cr, FIXED_POINT_MIN*10.0);
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draw_lines (cr);
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cairo_restore (cr);
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cairo_translate (cr, CELL_WIDTH + PAD, 0);
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cairo_save (cr);
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cairo_set_line_width (cr, FIXED_POINT_MIN);
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draw_lines (cr);
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cairo_restore (cr);
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cairo_translate (cr, CELL_WIDTH + PAD, 0);
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cairo_save (cr);
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cairo_set_line_width (cr, FIXED_POINT_MIN/10.0);
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draw_lines (cr);
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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 (thin_lines,
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"Tests that very thin lines are output to vector surfaces",
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"stroke", /* keywords */
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NULL, /* requirements */
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IMAGE_WIDTH, IMAGE_HEIGHT,
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NULL, draw)
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