juce_CustomTypeface.h

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/*
  ==============================================================================
 
   This file is part of the JUCE library.
   Copyright (c) 2015 - ROLI Ltd.
 
   Permission is granted to use this software under the terms of either:
   a) the GPL v2 (or any later version)
   b) the Affero GPL v3
 
   Details of these licenses can be found at: www.gnu.org/licenses
 
   JUCE 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 General Public License for more details.
 
   ------------------------------------------------------------------------------
 
   To release a closed-source product which uses JUCE, commercial licenses are
   available: visit www.juce.com for more information.
 
  ==============================================================================
*/
 
#ifndef JUCE_CUSTOMTYPEFACE_H_INCLUDED
#define JUCE_CUSTOMTYPEFACE_H_INCLUDED
 
 
//==============================================================================
class JUCE_API  CustomTypeface  : public Typeface
{
public:
    //==============================================================================
    CustomTypeface();
 
    explicit CustomTypeface (InputStream& serialisedTypefaceStream);
 
    ~CustomTypeface();
 
    //==============================================================================
    void clear();
 
    void setCharacteristics (const String& fontFamily, float ascent,
                             bool isBold, bool isItalic,
                             juce_wchar defaultCharacter) noexcept;
 
    void setCharacteristics (const String& fontFamily, const String& fontStyle,
                             float ascent, juce_wchar defaultCharacter) noexcept;
 
    void addGlyph (juce_wchar character, const Path& path, float width) noexcept;
 
    void addKerningPair (juce_wchar char1, juce_wchar char2, float extraAmount) noexcept;
 
    void addGlyphsFromOtherTypeface (Typeface& typefaceToCopy, juce_wchar characterStartIndex, int numCharacters) noexcept;
 
    bool writeToStream (OutputStream& outputStream);
 
    //==============================================================================
    // The following methods implement the basic Typeface behaviour.
    float getAscent() const override;
    float getDescent() const override;
    float getHeightToPointsFactor() const override;
    float getStringWidth (const String&) override;
    void getGlyphPositions (const String&, Array <int>& glyphs, Array<float>& xOffsets) override;
    bool getOutlineForGlyph (int glyphNumber, Path&) override;
    EdgeTable* getEdgeTableForGlyph (int glyphNumber, const AffineTransform&, float fontHeight) override;
 
protected:
    //==============================================================================
    juce_wchar defaultCharacter;
    float ascent;
 
    //==============================================================================
    virtual bool loadGlyphIfPossible (juce_wchar characterNeeded);
 
private:
    //==============================================================================
    class GlyphInfo;
    friend struct ContainerDeletePolicy<GlyphInfo>;
    OwnedArray<GlyphInfo> glyphs;
    short lookupTable [128];
 
    GlyphInfo* findGlyph (const juce_wchar character, bool loadIfNeeded) noexcept;
 
    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (CustomTypeface)
};
 
#endif   // JUCE_CUSTOMTYPEFACE_H_INCLUDED