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// SPDX-License-Identifier: MIT OR MPL-2.0 OR LGPL-2.1-or-later OR GPL-2.0-or-later
// Copyright 2012, SIL International, All rights reserved.
#pragma once
#include "graphite2/Font.h"
#include "inc/Main.h"
#include "inc/Position.h"
#include "inc/GlyphFace.h"
namespace graphite2 {
class Face;
class FeatureVal;
class Segment;
struct SlantBox
{
static const SlantBox empty;
// SlantBox(float psi = 0., float pdi = 0., float psa = 0., float pda = 0.) : si(psi), di(pdi), sa(psa), da(pda) {};
float width() const { return sa - si; }
float height() const { return da - di; }
float si; // min
float di; // min
float sa; // max
float da; // max
};
struct BBox
{
BBox(float pxi = 0, float pyi = 0., float pxa = 0., float pya = 0.) : xi(pxi), yi(pyi), xa(pxa), ya(pya) {};
float width() const { return xa - xi; }
float height() const { return ya - yi; }
float xi; // min
float yi; // min
float xa; // max
float ya; // max
};
class GlyphBox
{
GlyphBox(const GlyphBox &);
GlyphBox & operator = (const GlyphBox &);
public:
GlyphBox(uint8 numsubs, unsigned short bitmap, Rect *slanted) : _num(numsubs), _bitmap(bitmap), _slant(*slanted) {};
void addSubBox(int subindex, int boundary, Rect *val) { _subs[subindex * 2 + boundary] = *val; }
Rect &subVal(int subindex, int boundary) { return _subs[subindex * 2 + boundary]; }
const Rect &slant() const { return _slant; }
uint8 num() const { return _num; }
const Rect *subs() const { return _subs; }
private:
uint8 _num;
unsigned short _bitmap;
Rect _slant;
Rect _subs[1];
};
class GlyphCache
{
class Loader;
GlyphCache(const GlyphCache&);
GlyphCache& operator=(const GlyphCache&);
public:
GlyphCache(const Face & face, const uint32 face_options);
~GlyphCache();
unsigned short numGlyphs() const throw();
unsigned short numAttrs() const throw();
unsigned short unitsPerEm() const throw();
const GlyphFace *glyph(unsigned short glyphid) const; //result may be changed by subsequent call with a different glyphid
const GlyphFace *glyphSafe(unsigned short glyphid) const;
float getBoundingMetric(unsigned short glyphid, uint8 metric) const;
uint8 numSubBounds(unsigned short glyphid) const;
float getSubBoundingMetric(unsigned short glyphid, uint8 subindex, uint8 metric) const;
const Rect & slant(unsigned short glyphid) const { return _boxes[glyphid] ? _boxes[glyphid]->slant() : _empty_slant_box; }
const SlantBox & getBoundingSlantBox(unsigned short glyphid) const;
const BBox & getBoundingBBox(unsigned short glyphid) const;
const SlantBox & getSubBoundingSlantBox(unsigned short glyphid, uint8 subindex) const;
const BBox & getSubBoundingBBox(unsigned short glyphid, uint8 subindex) const;
bool check(unsigned short glyphid) const;
bool hasBoxes() const { return _boxes != 0; }
CLASS_NEW_DELETE;
private:
const Rect _empty_slant_box;
const Loader * _glyph_loader;
const GlyphFace * * _glyphs;
GlyphBox * * _boxes;
unsigned short _num_glyphs,
_num_attrs,
_upem;
};
inline
unsigned short GlyphCache::numGlyphs() const throw()
{
return _num_glyphs;
}
inline
unsigned short GlyphCache::numAttrs() const throw()
{
return _num_attrs;
}
inline
unsigned short GlyphCache::unitsPerEm() const throw()
{
return _upem;
}
inline
bool GlyphCache::check(unsigned short glyphid) const
{
return _boxes && glyphid < _num_glyphs;
}
inline
const GlyphFace *GlyphCache::glyphSafe(unsigned short glyphid) const
{
return glyphid < _num_glyphs ? glyph(glyphid) : NULL;
}
inline
float GlyphCache::getBoundingMetric(unsigned short glyphid, uint8 metric) const
{
if (glyphid >= _num_glyphs) return 0.;
switch (metric) {
case 0: return (float)(glyph(glyphid)->theBBox().bl.x); // x_min
case 1: return (float)(glyph(glyphid)->theBBox().bl.y); // y_min
case 2: return (float)(glyph(glyphid)->theBBox().tr.x); // x_max
case 3: return (float)(glyph(glyphid)->theBBox().tr.y); // y_max
case 4: return (float)(_boxes[glyphid] ? _boxes[glyphid]->slant().bl.x : 0.f); // sum_min
case 5: return (float)(_boxes[glyphid] ? _boxes[glyphid]->slant().bl.y : 0.f); // diff_min
case 6: return (float)(_boxes[glyphid] ? _boxes[glyphid]->slant().tr.x : 0.f); // sum_max
case 7: return (float)(_boxes[glyphid] ? _boxes[glyphid]->slant().tr.y : 0.f); // diff_max
default: return 0.;
}
}
inline const SlantBox &GlyphCache::getBoundingSlantBox(unsigned short glyphid) const
{
return _boxes[glyphid] ? *(SlantBox *)(&(_boxes[glyphid]->slant())) : SlantBox::empty;
}
inline const BBox &GlyphCache::getBoundingBBox(unsigned short glyphid) const
{
return *(BBox *)(&(glyph(glyphid)->theBBox()));
}
inline
float GlyphCache::getSubBoundingMetric(unsigned short glyphid, uint8 subindex, uint8 metric) const
{
GlyphBox *b = _boxes[glyphid];
if (b == NULL || subindex >= b->num()) return 0;
switch (metric) {
case 0: return b->subVal(subindex, 0).bl.x;
case 1: return b->subVal(subindex, 0).bl.y;
case 2: return b->subVal(subindex, 0).tr.x;
case 3: return b->subVal(subindex, 0).tr.y;
case 4: return b->subVal(subindex, 1).bl.x;
case 5: return b->subVal(subindex, 1).bl.y;
case 6: return b->subVal(subindex, 1).tr.x;
case 7: return b->subVal(subindex, 1).tr.y;
default: return 0.;
}
}
inline const SlantBox &GlyphCache::getSubBoundingSlantBox(unsigned short glyphid, uint8 subindex) const
{
GlyphBox *b = _boxes[glyphid];
return *(SlantBox *)(b->subs() + 2 * subindex + 1);
}
inline const BBox &GlyphCache::getSubBoundingBBox(unsigned short glyphid, uint8 subindex) const
{
GlyphBox *b = _boxes[glyphid];
return *(BBox *)(b->subs() + 2 * subindex);
}
inline
uint8 GlyphCache::numSubBounds(unsigned short glyphid) const
{
return _boxes[glyphid] ? _boxes[glyphid]->num() : 0;
}
} // namespace graphite2
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