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C-/C++-Quelltext

void TTFFont::open(Bitmap& _bitmap,const char* _filename, unsigned int _size,Color _color,uint _charsperwidth,uint _charsperheight){

    FT_Face face;

    if(FT_New_Face(TTFFont::library.getLibrary(), _filename, 0, &face) != 0){
        LogError error;
        char buffer[1024];
        sprintf(buffer,"Could not load font file: %s \n",_filename);
        error.setError(buffer);
        throw error;
    }

    if(!(face->face_flags & FT_FACE_FLAG_SCALABLE) ||
        !(face->face_flags & FT_FACE_FLAG_HORIZONTAL)){
            LogError error;
            char buffer[1024];
            sprintf(buffer,"Invalid font: Error setting font size: %s \n",_filename);
            error.setError(buffer);
            throw error;
    }

    FT_Set_Pixel_Sizes(face, _size, 0);


    uint charWidth = 0;
    uint charIndex = 0;
    // widths.size() == 256

    for(size_t ch = 0; ch < this->widths.size(); ++ch){
        charIndex = FT_Get_Char_Index(face, ch);

        FT_Load_Glyph(face, charIndex, FT_LOAD_DEFAULT);
        FT_Render_Glyph(face->glyph, FT_RENDER_MODE_NORMAL);

        this->widths[ch] = face->glyph->bitmap.width;
        this->height = std::max<uint>(face->glyph->bitmap.rows,this->height);
        charWidth = std::max<uint>(this->widths[ch],charWidth);
    }

    _bitmap.NewBitmap(charWidth*_charsperwidth,this->height*_charsperheight);

    uint x = std::max<uint>(charWidth/2-this->widths[0]/2,0);
    uint y = 0;

    for(uint ch = 0; ch < this->widths.size(); ++ch){
        uint charIndex = FT_Get_Char_Index(face, ch);

        FT_Load_Glyph(face, charIndex, FT_LOAD_DEFAULT);
        FT_Render_Glyph(face->glyph, FT_RENDER_MODE_NORMAL);

        for(int row = 0; row < face->glyph->bitmap.rows; ++row){
            for(int pixel = 0; pixel < face->glyph->bitmap.width; ++pixel){
                if(face->glyph->bitmap.buffer[pixel + row * face->glyph->bitmap.width] > 0){
                    uint pxi = 4*(x + y * _bitmap.getWidth());
                    _bitmap.getPixels()[pxi] = _color.red;
                    _bitmap.getPixels()[pxi+1] = _color.blue;
                    _bitmap.getPixels()[pxi+2] = _color.green;
                    _bitmap.getPixels()[pxi+3] = face->glyph->bitmap.buffer[pixel + row * face->glyph->bitmap.pitch];
                }
            }
        }
        x += charWidth;
        if(x > _bitmap.getWidth()){
            x = std::max<uint>(charWidth/2-this->widths[ch]/2,0);
            y += this->height;
        }
        if(y > _bitmap.getHeight())
            break;
    }

    FT_Done_Face(face);
}