fsCFont.h

Go to the documentation of this file.

/********************************************************************
*
*       File:           fsCFont.h
*
*       Purpose:        bgfx font implementation. Bakes a glyph atlas with
*                               stb_truetype into a bgfx texture at load time.
*
*********************************************************************/
 
#ifndef fsCFonthdr
#define fsCFonthdr
 
#include <map>
#include <memory>
 
#include <bgfx/bgfx.h>
 
#include "../../fsIFont.h"
 
 
class fsCFont : public fsIFont
{
 
        friend class fsIFont;
        friend class fsCRenderer;
        friend class fsCNativeTextSprite;
 
public:
 
        virtual ~fsCFont();
 
protected:
 
        void initialiseDo(const fsSFontParams& pParams) override;
 
        fsCFont();
 
private:
 
        struct fsSGlyph
        {
                // atlas rect in texels
                fsF32 mX0 = 0;
                fsF32 mY0 = 0;
                fsF32 mX1 = 0;
                fsF32 mY1 = 0;
                // layout offsets relative to the baseline pen position
                fsF32 mXOff = 0;
                fsF32 mYOff = 0;
                fsF32 mXAdvance = 0;
        };
 
        const fsSGlyph* glyphGet(fsS32 pCodepoint) const;
 
        std::map<fsS32, fsSGlyph> mGlyphs;
        bgfx::TextureHandle mTexture = BGFX_INVALID_HANDLE;
        fsS32 mAtlasWidth = 0;
        fsS32 mAtlasHeight = 0;
        fsF32 mPointSize = 0;
        fsF32 mAscent = 0;
        fsF32 mLineHeight = 0;
 
};
 
#endif