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137 lines
4.5 KiB
C++
137 lines
4.5 KiB
C++
/*
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* Fonts.h, part of VCMI engine
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*
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* Authors: listed in file AUTHORS in main folder
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*
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* License: GNU General Public License v2.0 or later
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* Full text of license available in license.txt file, in main folder
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*
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*/
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#pragma once
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VCMI_LIB_NAMESPACE_BEGIN
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class JsonNode;
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VCMI_LIB_NAMESPACE_END
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struct Point;
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struct SDL_Surface;
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struct SDL_Color;
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typedef struct _TTF_Font TTF_Font;
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class CBitmapFont;
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class CBitmapHanFont;
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class IFont
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{
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protected:
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/// Internal function to render font, see renderTextLeft
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virtual void renderText(SDL_Surface * surface, const std::string & data, const SDL_Color & color, const Point & pos) const = 0;
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public:
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virtual ~IFont()
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{}
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/// Returns height of font
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virtual size_t getLineHeight() const = 0;
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/// Returns width, in pixels of a character glyph. Pointer must contain at least characterSize valid bytes
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virtual size_t getGlyphWidth(const char * data) const = 0;
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/// Return width of the string
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virtual size_t getStringWidth(const std::string & data) const;
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/**
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* @param surface - destination to print text on
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* @param data - string to print
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* @param color - font color
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* @param pos - position of rendered font
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*/
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/// pos = topleft corner of the text
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void renderTextLeft(SDL_Surface * surface, const std::string & data, const SDL_Color & color, const Point & pos) const;
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/// pos = center of the text
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void renderTextRight(SDL_Surface * surface, const std::string & data, const SDL_Color & color, const Point & pos) const;
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/// pos = bottomright corner of the text
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void renderTextCenter(SDL_Surface * surface, const std::string & data, const SDL_Color & color, const Point & pos) const;
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/// pos = topleft corner of the text
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void renderTextLinesLeft(SDL_Surface * surface, const std::vector<std::string> & data, const SDL_Color & color, const Point & pos) const;
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/// pos = center of the text
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void renderTextLinesRight(SDL_Surface * surface, const std::vector<std::string> & data, const SDL_Color & color, const Point & pos) const;
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/// pos = bottomright corner of the text
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void renderTextLinesCenter(SDL_Surface * surface, const std::vector<std::string> & data, const SDL_Color & color, const Point & pos) const;
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};
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class CBitmapFont : public IFont
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{
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static const size_t totalChars = 256;
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struct BitmapChar
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{
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si32 leftOffset;
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ui32 width;
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si32 rightOffset;
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ui8 *pixels; // pixels of this character, part of BitmapFont::data
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};
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const std::pair<std::unique_ptr<ui8[]>, ui64> data;
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const std::array<BitmapChar, totalChars> chars;
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const ui8 height;
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std::array<BitmapChar, totalChars> loadChars() const;
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void renderCharacter(SDL_Surface * surface, const BitmapChar & character, const SDL_Color & color, int &posX, int &posY) const;
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void renderText(SDL_Surface * surface, const std::string & data, const SDL_Color & color, const Point & pos) const override;
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public:
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CBitmapFont(const std::string & filename);
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size_t getLineHeight() const override;
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size_t getGlyphWidth(const char * data) const override;
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friend class CBitmapHanFont;
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};
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/// supports multi-byte characters for such languages like Chinese
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class CBitmapHanFont : public IFont
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{
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std::unique_ptr<CBitmapFont> fallback;
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// data, directly copied from file
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const std::pair<std::unique_ptr<ui8[]>, ui64> data;
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// size of the font. Not available in file but needed for proper rendering
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const size_t size;
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size_t getCharacterDataOffset(size_t index) const;
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size_t getCharacterIndex(ui8 first, ui8 second) const;
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void renderCharacter(SDL_Surface * surface, int characterIndex, const SDL_Color & color, int &posX, int &posY) const;
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void renderText(SDL_Surface * surface, const std::string & data, const SDL_Color & color, const Point & pos) const override;
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public:
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CBitmapHanFont(const JsonNode & config);
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size_t getLineHeight() const override;
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size_t getGlyphWidth(const char * data) const override;
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};
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class CTrueTypeFont : public IFont
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{
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const std::pair<std::unique_ptr<ui8[]>, ui64> data;
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const std::unique_ptr<TTF_Font, void (*)(TTF_Font*)> font;
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const bool blended;
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std::pair<std::unique_ptr<ui8[]>, ui64> loadData(const JsonNode & config);
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TTF_Font * loadFont(const JsonNode & config);
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int getFontStyle(const JsonNode & config);
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void renderText(SDL_Surface * surface, const std::string & data, const SDL_Color & color, const Point & pos) const override;
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public:
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CTrueTypeFont(const JsonNode & fontConfig);
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size_t getLineHeight() const override;
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size_t getGlyphWidth(const char * data) const override;
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size_t getStringWidth(const std::string & data) const override;
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};
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