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Diffstat (limited to 'Build/source/libs/graphite2/graphite2-1.3.0/src/inc/GlyphCache.h')
-rw-r--r-- | Build/source/libs/graphite2/graphite2-1.3.0/src/inc/GlyphCache.h | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/Build/source/libs/graphite2/graphite2-1.3.0/src/inc/GlyphCache.h b/Build/source/libs/graphite2/graphite2-1.3.0/src/inc/GlyphCache.h new file mode 100644 index 00000000000..821aae53f2d --- /dev/null +++ b/Build/source/libs/graphite2/graphite2-1.3.0/src/inc/GlyphCache.h @@ -0,0 +1,227 @@ +/* GRAPHITE2 LICENSING + + Copyright 2012, SIL International + All rights reserved. + + This library is free software; you can redistribute it and/or modify + it under the terms of the GNU Lesser General Public License as published + by the Free Software Foundation; either version 2.1 of License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should also have received a copy of the GNU Lesser General Public + License along with this library in the file named "LICENSE". + If not, write to the Free Software Foundation, 51 Franklin Street, + Suite 500, Boston, MA 02110-1335, USA or visit their web page on the + internet at http://www.fsf.org/licenses/lgpl.html. + +Alternatively, the contents of this file may be used under the terms of the +Mozilla Public License (http://mozilla.org/MPL) or the GNU General Public +License, as published by the Free Software Foundation, either version 2 +of the License or (at your option) any later version. +*/ +#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; + + +class SlantBox +{ +public: + 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 +}; + +static SlantBox nullSlant(0, 0, 0, 0); + +class BBox +{ +public: + 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 +}; + +static BBox nullBBox(0, 0, 0, 0); + +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&); + + static const Rect nullRect; + +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() : nullRect; } + 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; + + CLASS_NEW_DELETE; + +private: + 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 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())) : nullSlant; +} + +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]; +// if (b == NULL || subindex >= b->num()) return nullSlant; + return *(SlantBox *)(b->subs() + 2 * subindex + 1); +} + +inline const BBox &GlyphCache::getSubBoundingBBox(unsigned short glyphid, uint8 subindex) const +{ + GlyphBox *b = _boxes[glyphid]; +// if (b == NULL || subindex >= b->num()) return nullBBox; + return *(BBox *)(b->subs() + 2 * subindex); +} + +inline +uint8 GlyphCache::numSubBounds(unsigned short glyphid) const +{ + return _boxes[glyphid] ? _boxes[glyphid]->num() : 0; +} + +} // namespace graphite2 |