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 (c) 2000-2005 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 #ifndef __GLPIXELBUFFER_H__ 00026 #define __GLPIXELBUFFER_H__ 00027 00028 #include "OgreGLPrerequisites.h" 00029 #include "OgreHardwarePixelBuffer.h" 00030 00031 namespace Ogre { 00032 class GLHardwarePixelBuffer: public HardwarePixelBuffer 00033 { 00034 protected: 00036 PixelBox lockImpl(const Image::Box lockBox, LockOptions options); 00037 00039 void unlockImpl(void); 00040 00041 // Internal buffer; either on-card or in system memory, freed/allocated on demand 00042 // depending on buffer usage 00043 PixelBox mBuffer; 00044 GLenum mGLInternalFormat; // GL internal format 00045 LockOptions mCurrentLockOptions; 00046 00047 // Buffer allocation/freeage 00048 void allocateBuffer(); 00049 void freeBuffer(); 00050 // Upload a box of pixels to this buffer on the card 00051 virtual void upload(const PixelBox &data); 00052 // Download a box of pixels from the card 00053 virtual void download(const PixelBox &data); 00054 public: 00056 GLHardwarePixelBuffer(size_t mWidth, size_t mHeight, size_t mDepth, 00057 PixelFormat mFormat, 00058 HardwareBuffer::Usage usage); 00059 00061 void blitFromMemory(const PixelBox &src, const Image::Box &dstBox); 00062 00064 void blitToMemory(const Image::Box &srcBox, const PixelBox &dst); 00065 00066 ~GLHardwarePixelBuffer(); 00067 00070 virtual void bindToFramebuffer(GLenum attachment, size_t zoffset); 00071 GLenum getGLFormat() { return mGLInternalFormat; } 00072 }; 00073 00076 class GLTextureBuffer: public GLHardwarePixelBuffer 00077 { 00078 public: 00080 GLTextureBuffer(const String &baseName, GLenum target, GLuint id, GLint face, GLint level, Usage usage, 00081 bool softwareMipmap); 00082 ~GLTextureBuffer(); 00083 00085 virtual void bindToFramebuffer(GLenum attachment, size_t zoffset); 00087 RenderTexture* getRenderTarget(size_t); 00088 // Upload a box of pixels to this buffer on the card 00089 virtual void upload(const PixelBox &data); 00090 // Download a box of pixels from the card 00091 virtual void download(const PixelBox &data); 00092 00093 // Hardware implementation of blitFromMemory 00094 virtual void blitFromMemory(const PixelBox &src_orig, const Image::Box &dstBox); 00095 00096 // Notify TextureBuffer of destruction of render target 00097 void _clearSliceRTT(size_t zoffset) 00098 { 00099 mSliceTRT[zoffset] = 0; 00100 } 00101 // Copy from framebuffer 00102 void copyFromFramebuffer(size_t zoffset); 00104 void blit(const HardwarePixelBufferSharedPtr &src, const Image::Box &srcBox, const Image::Box &dstBox); 00105 // Blitting implementation 00106 void blitFromTexture(GLTextureBuffer *src, const Image::Box &srcBox, const Image::Box &dstBox); 00107 protected: 00108 // In case this is a texture level 00109 GLenum mTarget; 00110 GLenum mFaceTarget; // same as mTarget in case of GL_TEXTURE_xD, but cubemap face for cubemaps 00111 GLuint mTextureID; 00112 GLint mFace; 00113 GLint mLevel; 00114 bool mSoftwareMipmap; // Use GLU for mip mapping 00115 00116 typedef std::vector<RenderTexture*> SliceTRT; 00117 SliceTRT mSliceTRT; 00118 }; 00121 class GLRenderBuffer: public GLHardwarePixelBuffer 00122 { 00123 public: 00124 GLRenderBuffer(GLenum format, size_t width, size_t height); 00125 ~GLRenderBuffer(); 00126 00128 virtual void bindToFramebuffer(GLenum attachment, size_t zoffset); 00129 protected: 00130 // In case this is a render buffer 00131 GLuint mRenderbufferID; 00132 }; 00133 }; 00134 00135 #endif
Copyright © 2000-2005 by The OGRE Team
This work is licensed under a Creative Commons Attribution-ShareAlike 2.5 License.
Last modified Sun Nov 12 10:50:10 2006