juce_Typeface.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  Typeface  : public ReferenceCountedObject
{
public:
    //==============================================================================
    using Ptr = ReferenceCountedObjectPtr<Typeface>;
 
    //==============================================================================
    const String& getName() const noexcept      { return name; }
 
    //==============================================================================
    const String& getStyle() const noexcept     { return style; }
 
    //==============================================================================
    static Ptr createSystemTypefaceFor (const Font& font);

    static Ptr createSystemTypefaceFor (const void* fontFileData, size_t fontFileDataSize);
 
    //==============================================================================
    ~Typeface() override;

    virtual bool isSuitableForFont (const Font&) const          { return true; }

    virtual float getAscent() const = 0;

    virtual float getDescent() const = 0;

    virtual float getHeightToPointsFactor() const = 0;

    virtual float getStringWidth (const String& text) = 0;

    virtual void getGlyphPositions (const String& text, Array<int>& glyphs, Array<float>& xOffsets) = 0;

    virtual bool getOutlineForGlyph (int glyphNumber, Path& path) = 0;

    virtual EdgeTable* getEdgeTableForGlyph (int glyphNumber, const AffineTransform& transform, float fontHeight);

    virtual bool isHinted() const                           { return false; }
 
    //==============================================================================
    static void setTypefaceCacheSize (int numFontsToCache);

    static void clearTypefaceCache();

    static void scanFolderForFonts (const File& folder);

    void applyVerticalHintingTransform (float fontHeight, Path& path);
 
protected:
    //==============================================================================
    String name, style;
 
    Typeface (const String& name, const String& style) noexcept;
 
    static Ptr getFallbackTypeface();
 
private:
    struct HintingParams;
    std::unique_ptr<HintingParams> hintingParams;
    CriticalSection hintingLock;
 
    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (Typeface)
};
 
} // namespace juce