145 lines
4.0 KiB
C++
145 lines
4.0 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_OT_COLOR_COLR_TABLE_HH
|
|
#define HB_OT_COLOR_COLR_TABLE_HH
|
|
|
|
#include "hb-open-type.hh"
|
|
|
|
/*
|
|
* COLR -- Color
|
|
* https://docs.microsoft.com/en-us/typography/opentype/spec/colr
|
|
*/
|
|
#define HB_OT_TAG_COLR HB_TAG('C','O','L','R')
|
|
|
|
|
|
namespace OT {
|
|
|
|
|
|
struct LayerRecord
|
|
{
|
|
friend struct COLR;
|
|
|
|
inline bool sanitize (hb_sanitize_context_t *c) const
|
|
{
|
|
TRACE_SANITIZE (this);
|
|
return_trace (c->check_struct (this));
|
|
}
|
|
|
|
protected:
|
|
GlyphID glyphid; /* Glyph ID of layer glyph */
|
|
HBUINT16 colorIdx; /* Index value to use with a selected color palette */
|
|
public:
|
|
DEFINE_SIZE_STATIC (4);
|
|
};
|
|
|
|
struct BaseGlyphRecord
|
|
{
|
|
friend struct COLR;
|
|
|
|
inline bool sanitize (hb_sanitize_context_t *c) const
|
|
{
|
|
TRACE_SANITIZE (this);
|
|
return_trace (likely (c->check_struct (this)));
|
|
}
|
|
|
|
inline int cmp (hb_codepoint_t g) const {
|
|
return g < glyphid ? -1 : g > glyphid ? 1 : 0;
|
|
}
|
|
|
|
protected:
|
|
GlyphID glyphid; /* Glyph ID of reference glyph */
|
|
HBUINT16 firstLayerIdx; /* Index to the layer record */
|
|
HBUINT16 numLayers; /* Number of color layers associated with this glyph */
|
|
public:
|
|
DEFINE_SIZE_STATIC (6);
|
|
};
|
|
|
|
static int compare_bgr (const void *pa, const void *pb)
|
|
{
|
|
const hb_codepoint_t *a = (const hb_codepoint_t *) pa;
|
|
const BaseGlyphRecord *b = (const BaseGlyphRecord *) pb;
|
|
return b->cmp (*a);
|
|
}
|
|
|
|
struct COLR
|
|
{
|
|
static const hb_tag_t tableTag = HB_OT_TAG_COLR;
|
|
|
|
inline bool sanitize (hb_sanitize_context_t *c) const
|
|
{
|
|
TRACE_SANITIZE (this);
|
|
return_trace (likely (c->check_struct (this) &&
|
|
(this+baseGlyphsZ).sanitize (c, numBaseGlyphs) &&
|
|
(this+layersZ).sanitize (c, numLayers)));
|
|
}
|
|
|
|
inline bool get_base_glyph_record (hb_codepoint_t glyph_id,
|
|
unsigned int *first_layer /* OUT */,
|
|
unsigned int *num_layers /* OUT */) const
|
|
{
|
|
const BaseGlyphRecord* record;
|
|
record = (BaseGlyphRecord *) bsearch (&glyph_id, &(this+baseGlyphsZ), numBaseGlyphs,
|
|
sizeof (BaseGlyphRecord), compare_bgr);
|
|
if (unlikely (!record))
|
|
return false;
|
|
|
|
*first_layer = record->firstLayerIdx;
|
|
*num_layers = record->numLayers;
|
|
return true;
|
|
}
|
|
|
|
inline bool get_layer_record (unsigned int record,
|
|
hb_codepoint_t *glyph_id /* OUT */,
|
|
unsigned int *palette_index /* OUT */) const
|
|
{
|
|
if (unlikely (record >= numLayers))
|
|
{
|
|
*glyph_id = 0;
|
|
*palette_index = 0xFFFF;
|
|
return false;
|
|
}
|
|
const LayerRecord &layer = (this+layersZ)[record];
|
|
*glyph_id = layer.glyphid;
|
|
*palette_index = layer.colorIdx;
|
|
return true;
|
|
}
|
|
|
|
protected:
|
|
HBUINT16 version; /* Table version number */
|
|
HBUINT16 numBaseGlyphs; /* Number of Base Glyph Records */
|
|
LOffsetTo<UnsizedArrayOf<BaseGlyphRecord> >
|
|
baseGlyphsZ; /* Offset to Base Glyph records. */
|
|
LOffsetTo<UnsizedArrayOf<LayerRecord> >
|
|
layersZ; /* Offset to Layer Records */
|
|
HBUINT16 numLayers; /* Number of Layer Records */
|
|
public:
|
|
DEFINE_SIZE_STATIC (14);
|
|
};
|
|
|
|
} /* namespace OT */
|
|
|
|
|
|
#endif /* HB_OT_COLOR_COLR_TABLE_HH */
|