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glt/fonttex.h

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#ifndef GLT_FONTTEX_H
#define GLT_FONTTEX_H

/*

  GLT OpenGL C++ Toolkit      
  Copyright (C) 2000-2002 Nigel Stewart
  Email: nigels.com@gmail.com   WWW: http://www.nigels.com/glt/

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*/

#include <glt/config.h>

#include <glt/font.h>
#include <glt/texture.h>

class GltFontTexture : public GltFont
{
public:
    GltFontTexture(void *data = NULL);
    ~GltFontTexture();

    void init(void *);  
    void clear(); 

    bool print(const wchar_t ch) const;
    bool print(const std::wstring &str) const;
    int  width(const wchar_t ch) const;

    //
    // Convert between raw font data and a GLTF buffer
    //

    static bool  makeHeader(std::string &header,const int width,const int height);
    static void *getHeader(const void * const h,int &width,int &height);

private:

    typedef struct 
    {
        uint16 glyph;
        byte   width;
        byte   height;
        char   xoffset;
        char   yoffset;
        char   advance;
        char   dummy;           // Ensure 32-bit alignment
        int16  x;
        int16  y;
    } 
    GlyphInfo;

    typedef struct 
    {
        GLfloat t0[2];
        GLshort v0[2];
        GLfloat t1[2];
        GLshort v1[2];
        GLfloat t2[2];
        GLshort v2[2];
        GLfloat t3[2];
        GLshort v3[2];
        byte    width;
        GLfloat advance;
    } 
    GlyphVertexInfo;

    //

    bool print(const char ch) const;        
    bool print(const std::string &str) const;

    void compileLists(void *);

    GltTexture _texture;
    int32      _maxAscent;
    int32      _maxDescent;
    int32      _numGlyphs;
    int32      _minGlyph;
    int32      _range;

    GlyphInfo         *_glyph;
    GlyphVertexInfo   *_glyphVertex;
    GlyphVertexInfo  **_glyphLut;

//  int   _width;
//  int   _height;
//  int   _listBase;
};

#endif

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