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