SkPDF: SkPDFFont organization changes.

src/pdf/SkPDFFontImpl.h

-/*
- * Copyright 2011 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-
-#ifndef SkPDFFontImpl_DEFINED
-#define SkPDFFontImpl_DEFINED
-
-#include "SkPDFFont.h"
-
-class SkPDFType0Font final : public SkPDFFont {
-public:
-    virtual ~SkPDFType0Font();
-    bool multiByteGlyphs() const override { return true; }
-    SkPDFFont* getFontSubset(const SkPDFGlyphSet* usage) override;
-#ifdef SK_DEBUG
-    void emitObject(SkWStream*,
-                    const SkPDFObjNumMap&,
-                    const SkPDFSubstituteMap&) const override;
-#endif
-
-private:
-    friend class SkPDFFont;  // to access the constructor
-#ifdef SK_DEBUG
-    bool fPopulated;
-    typedef SkPDFDict INHERITED;
-#endif
-
-    SkPDFType0Font(const SkAdvancedTypefaceMetrics* info,
-                   SkTypeface* typeface);
-
-    bool populate(const SkPDFGlyphSet* subset);
-};
-
-class SkPDFCIDFont final : public SkPDFFont {
-public:
-    virtual ~SkPDFCIDFont();
-    virtual bool multiByteGlyphs() const { return true; }
-
-private:
-    friend class SkPDFType0Font;  // to access the constructor
-
-    SkPDFCIDFont(const SkAdvancedTypefaceMetrics* info,
-                 SkTypeface* typeface,
-                 const SkPDFGlyphSet* subset);
-
-    bool populate(const SkPDFGlyphSet* subset);
-    bool addFontDescriptor(int16_t defaultWidth,
-                           const SkTDArray<uint32_t>* subset);
-};
-
-struct AdvanceMetric;
-
-class SkPDFType1Font final : public SkPDFFont {
-public:
-    virtual ~SkPDFType1Font();
-    virtual bool multiByteGlyphs() const { return false; }
-
-private:
-    friend class SkPDFFont;  // to access the constructor
-
-    SkPDFType1Font(const SkAdvancedTypefaceMetrics* info,
-                   SkTypeface* typeface,
-                   uint16_t glyphID,
-                   SkPDFDict* relatedFontDescriptor);
-
-    bool populate(int16_t glyphID);
-    bool addFontDescriptor(int16_t defaultWidth);
-    void addWidthInfoFromRange(int16_t defaultWidth,
-        const AdvanceMetric* widthRangeEntry);
-};
-
-class SkPDFType3Font final : public SkPDFFont {
-public:
-    virtual ~SkPDFType3Font();
-    virtual bool multiByteGlyphs() const { return false; }
-
-private:
-    friend class SkPDFFont;  // to access the constructor
-
-    SkPDFType3Font(const SkAdvancedTypefaceMetrics* info,
-                   SkTypeface* typeface,
-                   uint16_t glyphID);
-
-    bool populate(uint16_t glyphID);
-};
-
-#endif