axmol/core/2d/CCFontFNT.h

/****************************************************************************
 Copyright (c) 2013      Zynga Inc.
 Copyright (c) 2013-2016 Chukong Technologies Inc.
 Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.
 Copyright (c) 2021 Bytedance Inc.

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 of this software and associated documentation files (the "Software"), to deal
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 all copies or substantial portions of the Software.

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 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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#ifndef _CCFontFNT_h_
#define _CCFontFNT_h_

/// @cond DO_NOT_SHOW

#include "2d/CCFont.h"
#include <set>
#include <unordered_map>

NS_CC_BEGIN

/**
@struct BMFontDef
BMFont definition
*/
typedef struct _BMFontDef
{
    //! ID of the character
    unsigned int charID;
    //! origin and size of the font
    Rect rect;
    //! The X amount the image should be offset when drawing the image (in pixels)
    short xOffset;
    //! The Y amount the image should be offset when drawing the image (in pixels)
    short yOffset;
    //! The amount to move the current position after drawing the character (in pixels)
    short xAdvance;
} BMFontDef;

/** @struct BMFontPadding
BMFont padding
@since v0.8.2
*/
typedef struct _BMFontPadding
{
    /// padding left
    int left;
    /// padding top
    int top;
    /// padding right
    int right;
    /// padding bottom
    int bottom;
} BMFontPadding;

/** @brief BMFontConfiguration has parsed configuration of the .fnt file
@since v0.8
*/
class CC_DLL BMFontConfiguration : public Ref
{
    // FIXME: Creating a public interface so that the bitmapFontArray[] is accessible
public:  //@public
    // BMFont definitions
    std::unordered_map<int /* key */, BMFontDef /* fontDef */> _fontDefDictionary;

    //! FNTConfig: Common Height Should be signed (issue #1343)
    int _commonHeight;

    //! Padding
    BMFontPadding _padding;

    //! atlas name
    std::string _atlasName;

    //! values for kerning
    std::unordered_map<uint64_t /* key */, int /* amount */> _kerningDictionary;

    // Character Set defines the letters that actually exist in the font
    std::set<unsigned int>* _characterSet;

    //! Font size
    int _fontSize;

public:
    /**
     * @js ctor
     */
    BMFontConfiguration();
    /**
     * @js NA
     * @lua NA
     */
    virtual ~BMFontConfiguration();
    /**
     * @js NA
     * @lua NA
     */
    std::string description() const;

    /** allocates a BMFontConfiguration with a FNT file */
    static BMFontConfiguration* create(std::string_view FNTfile);

    /** initializes a BitmapFontConfiguration with a FNT file */
    bool initWithFNTfile(std::string_view FNTfile);

    std::string_view getAtlasName() { return _atlasName; }
    void setAtlasName(std::string_view atlasName) { _atlasName = atlasName; }

    std::set<unsigned int>* getCharacterSet() const;

protected:
    virtual std::set<unsigned int>* parseConfigFile(std::string_view controlFile);
    virtual std::set<unsigned int>* parseBinaryConfigFile(unsigned char* pData,
                                                          uint32_t size,
                                                          std::string_view controlFile);

private:
    unsigned int parseCharacterDefinition(const char* line);
    void parseInfoArguments(const char* line);
    void parseCommonArguments(const char* line);
    void parseImageFileName(const char* line, std::string_view fntFile);
    void parseKerningEntry(const char* line);
    void purgeKerningDictionary();
    void purgeFontDefDictionary();
};

class CC_DLL FontFNT : public Font
{

public:
    static FontFNT* create(std::string_view fntFilePath, const Rect& imageRect, bool imageRotated);
    static FontFNT* create(std::string_view fntFilePath, std::string_view subTextureKey);
    static FontFNT* create(std::string_view fntFilePath);

    CC_DEPRECATED_ATTRIBUTE static FontFNT* create(std::string_view fntFilePath, const Vec2& imageOffset = Vec2::ZERO);

    /** Purges the cached data.
    Removes from memory the cached configurations and the atlas name dictionary.
    */
    static void purgeCachedData();
    virtual int* getHorizontalKerningForTextUTF32(const std::u32string& text, int& outNumLetters) const override;
    virtual FontAtlas* newFontAtlas() override;

    void setFontSize(float fontSize);
    float getFontSize() const { return _fontSize; }

    int getOriginalFontSize() const;

    static void reloadBMFontResource(std::string_view fntFilePath);

protected:
    FontFNT(BMFontConfiguration* theContfig, const Rect& imageRect, bool imageRotated);
    FontFNT(BMFontConfiguration* theContfig);

    /**
     * @js NA
     * @lua NA
     */
    virtual ~FontFNT();

    BMFontConfiguration* _configuration;

    int getHorizontalKerningForChars(char32_t firstChar, char32_t secondChar) const;

    Rect _imageRectInPoints;
    bool _imageRotated;

    // User defined font size
    float _fontSize;
};

/// @endcond

NS_CC_END

#endif /* defined(__cocos2d_libs__CCFontFNT__) */