glfont.h

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#pragma once
 
#ifdef WIN32
    #include <windows.h>
    #include <gl/GL.h>
#else
    #include <GL/gl.h>
    #include <fontconfig/fontconfig.h>
#endif
 
#include <ft2build.h>
#include FT_FREETYPE_H
 
#include <adtf_base.h>
#include <adtfdisplaytoolboxgraphics/gfxlibinterfaces.h>
 
 
namespace adtf
{
 
namespace disptb
{
 
namespace graphicslib
{
 
namespace dengar
{
 
class cGLCanvas;
 
class cGLFont : public IFont
{
protected:
    FT_Face m_hFace;             
    GLuint* m_hTextures;         
    GLuint m_nTextureBase;      
    tInt m_nHeight;           
    tInt m_aCharWidth[256];   
 
    static constexpr tInt m_nTextureScale = 8; 
 
    tBool m_bOpposedYAxis;
    tBool m_bScaleWithCoordinateSystem;
    tBool m_bRotationWithCoordinateSystem;
    tBool m_bTextBaselineOnTop;
 
public:
    static tResult Initialize();
 
    static tResult Uninitialize();
 
    cGLFont();
 
    ~cGLFont();
 
    tResult Create(const cGLCanvas* pCanvas, const char* strFilename, tInt nHeight, tStyle eFontStyle);
 
    tResult CleanUp();
 
    void Print(tInt x, tInt y, tFloat64 fAngle, const char* strFormat, va_list ArgList);
 
    void Print(tFloat32 x, tFloat32 y, tFloat64 fAngle, const char* strFormat, va_list ArgList);
 
 
    tVoid FlipTextHorizontally(tBool bOpposedYAxis);
 
    tVoid TextScaleWithCoordinateSystem(tBool bScaleWithCoordinateSystem);
 
    tVoid TextRotateWithCoordinateSystem(tBool bRotateWithCoordinateSystem);
 
    tVoid TextBaselineOnTop(tBool bTextBaselineOnTop);
 
public: // Implements IFont
 
    tResult Release();
 
    tInt GetHeight() const;
 
    
    tBool MeasureText(const char* str, tInt& nWidth, tInt& nHeight) const;
 
protected:
    tResult BuildDisplayList(char ch, tStyle eFontStyle);
 
    void PrintImpl(tUInt32 ui32Flags, tFloat32 x, tFloat32 y, tFloat64 fAngle, const char* strFormat, va_list ArgList);
 
 
};
 
}
 
using dengar::cGLFont;
}
 
}
 
}