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OgreGLTexture.h

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00001 /*
00002 -----------------------------------------------------------------------------
00003 This source file is part of OGRE
00004     (Object-oriented Graphics Rendering Engine)
00005 For the latest info, see http://www.ogre3d.org/
00006 
00007 Copyright © 2000-2002 The OGRE Team
00008 Also see acknowledgements in Readme.html
00009 
00010 This program is free software; you can redistribute it and/or modify it under
00011 the terms of the GNU Lesser General Public License as published by the Free Software
00012 Foundation; either version 2 of the License, or (at your option) any later
00013 version.
00014 
00015 This program is distributed in the hope that it will be useful, but WITHOUT
00016 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
00017 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
00018 
00019 You should have received a copy of the GNU Lesser General Public License along with
00020 this program; if not, write to the Free Software Foundation, Inc., 59 Temple
00021 Place - Suite 330, Boston, MA 02111-1307, USA, or go to
00022 http://www.gnu.org/copyleft/lesser.txt.
00023 -----------------------------------------------------------------------------
00024 */
00025 
00026 #ifndef __GLTEXTURE_H__
00027 #define __GLTEXTURE_H__
00028 
00029 #include "OgreGLPrerequisites.h"
00030 #include "OgrePlatform.h"
00031 #include "OgreRenderTexture.h"
00032 #include "OgreTexture.h"
00033 #include "OgreGLSupport.h"
00034 
00035 namespace Ogre {
00036 
00037     class GLTexture : public Texture
00038     {
00039     public:
00040         // Constructor, called from SDLTextureManager
00041         GLTexture( const String& name, GLSupport& support, 
00042                    TextureType texType = TEX_TYPE_2D );
00043         GLTexture( const String& name, GLSupport& support, TextureType texType, 
00044                    uint width, uint height, uint num_mips, PixelFormat format,
00045                    TextureUsage usage );
00046 
00047         virtual ~GLTexture();        
00048         
00049         void load();
00050         void loadImage( const Image &img );
00051         void loadImages( const std::vector<Image>& images );
00052 
00053         void unload();
00054 
00055         void createRenderTexture();
00056 
00057         void blitToTexture( const Image& src, 
00058             unsigned uStartX, unsigned uStartY );
00059 
00060         // Takes the ogre texture type and returns the appropriate GL one
00061         GLenum getGLTextureType(void) const;
00062 
00063         // Takes the ogre texture format and returns the appropriate GL one
00064         GLenum getGLTextureFormat(void) const;
00065 
00066         GLuint getGLID() const
00067         { return mTextureID; }
00068 
00069     protected:
00070         void generateMipMaps( uchar *data, bool useSoftware, bool isCompressed,
00071             size_t faceNumber );
00072         uchar* rescaleNPower2( const Image& src );
00073     private:
00074         GLuint mTextureID;
00075         GLSupport& mGLSupport;
00076     };
00077 
00078     class GLRenderTexture : public RenderTexture
00079     {
00080     public:
00081         GLRenderTexture(const String& name, uint width, uint height) 
00082             : RenderTexture(name, width, height) 
00083         {
00084         }
00085 
00086         void _copyToTexture(void);
00087 
00088         bool requiresTextureFlipping() const { return true; }
00089         virtual void writeContentsToFile( const String & filename ) {}
00090         virtual void outputText(int x, int y, const String& text) {}
00091     };
00092 }
00093 
00094 #endif // __GLTEXTURE_H__

Copyright © 2002-2003 by The OGRE Team
Last modified Wed Jan 21 00:10:12 2004