juce_CustomTypeface.h

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/*
  ==============================================================================
 
   This file is part of the JUCE library.
   Copyright (c) 2022 - Raw Material Software Limited
 
   JUCE is an open source library subject to commercial or open-source
   licensing.
 
   By using JUCE, you agree to the terms of both the JUCE 7 End-User License
   Agreement and JUCE Privacy Policy.
 
   End User License Agreement: www.juce.com/juce-7-licence
   Privacy Policy: www.juce.com/juce-privacy-policy
 
   Or: You may also use this code under the terms of the GPL v3 (see
   www.gnu.org/licenses).
 
   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.
 
  ==============================================================================
*/
 
namespace juce
{
 
//==============================================================================
class JUCE_API  CustomTypeface  : public Typeface
{
public:
    //==============================================================================
    CustomTypeface();

    explicit CustomTypeface (InputStream& serialisedTypefaceStream);

    ~CustomTypeface() override;
 
    //==============================================================================
    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;
    OwnedArray<GlyphInfo> glyphs;
    short lookupTable[128];
 
    GlyphInfo* findGlyph (const juce_wchar character, bool loadIfNeeded) noexcept;
 
    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (CustomTypeface)
};
 
} // namespace juce