[Complex Text Layouts] Add third-party TextServer dependencies (ICU, HarfBuzz, Graphite).

1 files changed, 223 insertions, 0 deletions

diff --git a/thirdparty/graphite/src/inc/GlyphCache.h b/thirdparty/graphite/src/inc/GlyphCache.h
new file mode 100644
index 0000000000..7d5324e522
--- /dev/null
+++ b/thirdparty/graphite/src/inc/GlyphCache.h
@@ -0,0 +1,223 @@
+/*  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