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/* -*- Mode: c; c-basic-offset: 4; tab-width: 8; indent-tabs-mode: t; -*- */
/* cairo - a vector graphics library with display and print output
*
* Copyright © 2006 Brian Ewins.
*
* 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
* Brian Ewins not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior
* permission. Brian Ewins makes no representations about the
* suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* BRIAN EWINS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL BRIAN EWINS 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: Brian Ewins <Brian.Ewins@gmail.com>
*/
/* Related to bug 9530
*
* cairo_glyph_t can contain any unsigned long in its 'index', the intention
* being that it is large enough to hold a pointer. However, this means that
* it can specify many glyph indexes which don't exist in the font, and may
* exceed the range of legal glyph indexes for the font backend. It may
* also contain special values that are not usable as indexes - e.g. 0xffff is
* kATSDeletedGlyphcode in ATSUI, a glyph that should not be drawn.
* The font backends should handle all legal and out-of-range values
* consistently.
*
* This test expects that operations on out-of-range and missing glyphs should
* act as if they were zero-width.
*/
#include "cairo-test.h"
#define WIDTH 100
#define HEIGHT 75
#define NUM_TEXT 20
#define TEXT_SIZE 12
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
cairo_text_extents_t extents;
int i;
/* Glyphs with no paths followed by 'cairo', the additional
* text is to make the space obvious.
*/
long int index[] = {
0, /* 'no matching glyph' */
0xffff, /* kATSDeletedGlyphCode */
0x1ffff, /* out of range */
-1L, /* out of range */
70, 68, 76, 85, 82 /* 'cairo' */
};
/* 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_select_font_face (cr, "Bitstream Vera Sans",
CAIRO_FONT_SLANT_NORMAL,
CAIRO_FONT_WEIGHT_NORMAL);
cairo_set_font_size (cr, 16);
for (i = 0; i < 9; i++) {
/* since we're just drawing glyphs directly we need to position them. */
cairo_glyph_t glyph = {
index[i], 10 * i, 25
};
/* test cairo_glyph_extents. Every glyph index should
* have extents, invalid glyphs should be zero-width.
*/
cairo_move_to (cr, glyph.x, glyph.y);
cairo_set_line_width (cr, 1.0);
cairo_glyph_extents (cr, &glyph, 1, &extents);
cairo_rectangle (cr,
glyph.x + extents.x_bearing - 0.5,
glyph.y + extents.y_bearing - 0.5,
extents.width + 1,
extents.height + 1);
cairo_set_source_rgb (cr, 1, 0, 0); /* red */
cairo_stroke (cr);
/* test cairo_show_glyphs. Every glyph index should be
* drawable, invalid glyph indexes should draw nothing.
*/
cairo_set_source_rgb (cr, 0, 0, 0); /* black */
cairo_show_glyphs (cr, &glyph, 1);
cairo_move_to (cr, glyph.x, glyph.y);
/* test cairo_glyph_path. Every glyph index should produce
* a path, invalid glyph indexes should have empty paths.
*/
/* Change the glyph position
* so that the paths are visible.
*/
glyph.y = 55;
cairo_move_to (cr, glyph.x, glyph.y);
cairo_glyph_path (cr, &glyph, 1);
cairo_fill (cr);
}
return CAIRO_TEST_SUCCESS;
}
CAIRO_TEST (text_glyph_range,
"Tests show_glyphs, glyph_path, glyph_extents with out of range glyph ids."
"\nft and atsui font backends fail, misreporting errors from FT_Load_Glyph and ATSUGlyphGetCubicPaths",
"text, stress", /* keywords */
NULL, /* requirements */
WIDTH, HEIGHT,
NULL, draw)
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