Move all text stuff to its own folder

src/gpu/GrFontScaler.h

-/*
- * Copyright 2010 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef GrFontScaler_DEFINED
-#define GrFontScaler_DEFINED
-
-#include "GrGlyph.h"
-#include "GrTypes.h"
-
-#include "SkDescriptor.h"
-
-class SkGlyph;
-class SkPath;
-
-/*
- *  Wrapper class to turn a font cache descriptor into a key 
- *  for GrFontScaler-related lookups
- */
-class GrFontDescKey : public SkRefCnt {
-public:
-    explicit GrFontDescKey(const SkDescriptor& desc) : fDesc(desc), fHash(desc.getChecksum()) {}
-    
-    uint32_t getHash() const { return fHash; }
-
-    bool operator==(const GrFontDescKey& rh) const {
-        return fHash == rh.fHash && fDesc.getDesc()->equals(*rh.fDesc.getDesc());
-    }
-    
-private:
-    SkAutoDescriptor fDesc;
-    uint32_t fHash;
-    
-    typedef SkRefCnt INHERITED;
-};
-
-/*
- *  This is Gr's interface to the host platform's font scaler.
- *
- *  The client is responsible for instantiating this. The instance is created 
- *  for a specific font+size+matrix.
- */
-class GrFontScaler : public SkRefCnt {
-public:
-    explicit GrFontScaler(SkGlyphCache* strike);
-    virtual ~GrFontScaler();
-    
-    const GrFontDescKey* getKey();
-    GrMaskFormat getMaskFormat() const;
-    GrMaskFormat getPackedGlyphMaskFormat(const SkGlyph&) const;
-    bool getPackedGlyphBounds(const SkGlyph&, SkIRect* bounds);
-    bool getPackedGlyphImage(const SkGlyph&, int width, int height, int rowBytes,
-                             GrMaskFormat expectedMaskFormat, void* image);
-    bool getPackedGlyphDFBounds(const SkGlyph&, SkIRect* bounds);
-    bool getPackedGlyphDFImage(const SkGlyph&, int width, int height, void* image);
-    const SkPath* getGlyphPath(const SkGlyph&);
-    const SkGlyph& grToSkGlyph(GrGlyph::PackedID);
-    
-private:
-    SkGlyphCache*  fStrike;
-    GrFontDescKey* fKey;
-    
-    typedef SkRefCnt INHERITED;
-};
-
-#endif