VRS - The Virtual Rendering System

version 3.3

fonttexture.h

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 /**********************************************************************
 VRS - The Virtual Rendering System
 Copyright (C) 2001 Computer Graphics Systems Group at the 
 Hasso-Plattner-Institute, Potsdam, Germany.
 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 FreeSoftware 
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA, 02111-1307, USA.
 **********************************************************************/


#ifndef __FONTTEXTURE_H__
#define __FONTTEXTURE_H__

#include <string>

#include <vrs/sharedobj.h>
#include <vrs/image/memoryimage.h>
#include <vrs/opengl/texturegl.h>

#include <vrs/text/vrs_textprerequisites.h>

struct FT_Bitmap_;
typedef struct FT_Bitmap_ FT_Bitmap;

namespace VRS
{
namespace TEXT
{    
    class VRS_CORE_API FontDefinition;


    class VRS_CORE_API FontTexture : public SharedObj
    {
    public:
        FontTexture( unsigned int textureSize, 
            SO<FontDefinition> fontDefinition,
            bool colored = false );
        virtual ~FontTexture();

        inline unsigned int getTextureSize() const { return m_TextureSize; };
        inline SO<FontDefinition> getFontDefinition() const
            { return m_FontDefinition; };

        TextureGL* getTexture();

        inline MemoryImage* getImage() const
            { return m_AlphaImage; }
 
        bool hasEnoughFreeSpace( SO<Image> img ) const;
        bool hasEnoughFreeSpace( const FT_Bitmap& bitmap ) const;
        bool hasEnoughFreeSpace( int width, int height ) const;

        void addGlyphToTexture( const FT_Bitmap& bitmap, unsigned int* uv = NULL );
        void addImageToTexture( SO<Image> img, unsigned int* uv = NULL );

        void writeToPng(const std::string& filename);

        VRS_TYPEINFO(FontTexture, SharedObj);
    private:
        unsigned int m_TextureSize;

        unsigned int m_GlyphSpacing;
        
        SO<MemoryImage> m_AlphaImage;
        SO<TextureGL> m_Texture;

        unsigned int m_CurrentXOffset;
        unsigned int m_CurrentYOffset;
        unsigned int m_CurrentRowHeight;
        SO<FontDefinition> m_FontDefinition;
    };
}
}

#endif

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