100 lines
2.8 KiB
C++
100 lines
2.8 KiB
C++
/*
|
|
* Copyright © 2018 Ebrahim Byagowi
|
|
*
|
|
* This is part of HarfBuzz, a text shaping library.
|
|
*
|
|
* Permission is hereby granted, without written agreement and without
|
|
* license or royalty fees, to use, copy, modify, and distribute this
|
|
* software and its documentation for any purpose, provided that the
|
|
* above copyright notice and the following two paragraphs appear in
|
|
* all copies of this software.
|
|
*
|
|
* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
|
|
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
|
|
* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
|
|
* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
|
|
* DAMAGE.
|
|
*
|
|
* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
|
|
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
|
|
* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
|
|
* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
|
|
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
|
|
*/
|
|
|
|
#ifndef HB_AAT_LAYOUT_ANKR_TABLE_HH
|
|
#define HB_AAT_LAYOUT_ANKR_TABLE_HH
|
|
|
|
#include "hb-aat-layout-common.hh"
|
|
|
|
/*
|
|
* ankr -- Anchor Point
|
|
* https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6ankr.html
|
|
*/
|
|
#define HB_AAT_TAG_ankr HB_TAG('a','n','k','r')
|
|
|
|
|
|
namespace AAT {
|
|
|
|
|
|
struct Anchor
|
|
{
|
|
inline bool sanitize (hb_sanitize_context_t *c) const
|
|
{
|
|
TRACE_SANITIZE (this);
|
|
return_trace (c->check_struct (this));
|
|
}
|
|
|
|
public:
|
|
FWORD xCoordinate;
|
|
FWORD yCoordinate;
|
|
public:
|
|
DEFINE_SIZE_STATIC (4);
|
|
};
|
|
|
|
typedef LArrayOf<Anchor> GlyphAnchors;
|
|
|
|
struct ankr
|
|
{
|
|
static const hb_tag_t tableTag = HB_AAT_TAG_ankr;
|
|
|
|
inline const Anchor &get_anchor (hb_codepoint_t glyph_id,
|
|
unsigned int i,
|
|
unsigned int num_glyphs,
|
|
const char *end) const
|
|
{
|
|
const Offset<HBUINT16, false> *offset = (this+lookupTable).get_value (glyph_id, num_glyphs);
|
|
if (!offset)
|
|
return Null(Anchor);
|
|
const GlyphAnchors &anchors = StructAtOffset<GlyphAnchors> (&(this+anchorData), *offset);
|
|
/* TODO Use sanitizer; to avoid overflows and more. */
|
|
if (unlikely ((const char *) &anchors + anchors.get_size () > end))
|
|
return Null(Anchor);
|
|
return anchors[i];
|
|
}
|
|
|
|
inline bool sanitize (hb_sanitize_context_t *c) const
|
|
{
|
|
TRACE_SANITIZE (this);
|
|
return_trace (likely (c->check_struct (this) &&
|
|
version == 0 &&
|
|
lookupTable.sanitize (c, this)));
|
|
}
|
|
|
|
protected:
|
|
HBUINT16 version; /* Version number (set to zero) */
|
|
HBUINT16 flags; /* Flags (currently unused; set to zero) */
|
|
LOffsetTo<Lookup<Offset<HBUINT16, false> >, false>
|
|
lookupTable; /* Offset to the table's lookup table */
|
|
LOffsetTo<HBUINT8, false>
|
|
anchorData; /* Offset to the glyph data table */
|
|
|
|
public:
|
|
DEFINE_SIZE_STATIC (12);
|
|
};
|
|
|
|
} /* namespace AAT */
|
|
|
|
|
|
#endif /* HB_AAT_LAYOUT_ANKR_TABLE_HH */
|