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+/* 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;
+
+
+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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