/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 Robert Osfield * * This library is open source and may be redistributed and/or modified under * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or * (at your option) any later version. The full license is in LICENSE file * included with this distribution, and on the openscenegraph.org website. * * 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 * OpenSceneGraph Public License for more details. */ #ifndef OSG_BUFFEROBJECT #define OSG_BUFFEROBJECT 1 #include #include #ifndef GL_ARB_vertex_buffer_object #define GL_ARB_vertex_buffer_object // for compatibility with gl.h headers that don't support VBO, #if defined(_WIN64) typedef __int64 GLintptrARB; typedef __int64 GLsizeiptrARB; #elif defined(__ia64__) || defined(__x86_64__) typedef long int GLintptrARB; typedef long int GLsizeiptrARB; #else typedef int GLintptrARB; typedef int GLsizeiptrARB; #endif #define GL_ARRAY_BUFFER_ARB 0x8892 #define GL_ELEMENT_ARRAY_BUFFER_ARB 0x8893 #define GL_PIXEL_PACK_BUFFER_ARB 0x88EB #define GL_PIXEL_UNPACK_BUFFER_ARB 0x88EC #define GL_ARRAY_BUFFER_BINDING_ARB 0x8894 #define GL_ELEMENT_ARRAY_BUFFER_BINDING_ARB 0x8895 #define GL_VERTEX_ARRAY_BUFFER_BINDING_ARB 0x8896 #define GL_NORMAL_ARRAY_BUFFER_BINDING_ARB 0x8897 #define GL_COLOR_ARRAY_BUFFER_BINDING_ARB 0x8898 #define GL_INDEX_ARRAY_BUFFER_BINDING_ARB 0x8899 #define GL_TEXTURE_COORD_ARRAY_BUFFER_BINDING_ARB 0x889A #define GL_EDGE_FLAG_ARRAY_BUFFER_BINDING_ARB 0x889B #define GL_SECONDARY_COLOR_ARRAY_BUFFER_BINDING_ARB 0x889C #define GL_FOG_COORDINATE_ARRAY_BUFFER_BINDING_ARB 0x889D #define GL_WEIGHT_ARRAY_BUFFER_BINDING_ARB 0x889E #define GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING_ARB 0x889F #define GL_PIXEL_PACK_BUFFER_BINDING_ARB 0x88ED #define GL_PIXEL_UNPACK_BUFFER_BINDING_ARB 0x88EF #define GL_STREAM_DRAW_ARB 0x88E0 #define GL_STREAM_READ_ARB 0x88E1 #define GL_STREAM_COPY_ARB 0x88E2 #define GL_STATIC_DRAW_ARB 0x88E4 #define GL_STATIC_READ_ARB 0x88E5 #define GL_STATIC_COPY_ARB 0x88E6 #define GL_DYNAMIC_DRAW_ARB 0x88E8 #define GL_DYNAMIC_READ_ARB 0x88E9 #define GL_DYNAMIC_COPY_ARB 0x88EA #define GL_READ_ONLY_ARB 0x88B8 #define GL_WRITE_ONLY_ARB 0x88B9 #define GL_READ_WRITE_ARB 0x88BA #define GL_BUFFER_SIZE_ARB 0x8764 #define GL_BUFFER_USAGE_ARB 0x8765 #define GL_BUFFER_ACCESS_ARB 0x88BB #define GL_BUFFER_MAPPED_ARB 0x88BC #define GL_BUFFER_MAP_POINTER_ARB 0x88BD #endif namespace osg { class SG_EXPORT BufferObject : public Object { public: BufferObject(); /** Copy constructor using CopyOp to manage deep vs shallow copy.*/ BufferObject(const BufferObject& bo,const CopyOp& copyop=CopyOp::SHALLOW_COPY); virtual bool isSameKindAs(const Object* obj) const { return dynamic_cast(obj)!=NULL; } virtual const char* libraryName() const { return "osg"; } virtual const char* className() const { return "BufferObject"; } struct BufferEntry { BufferEntry(): dataSize(0),offset(0) {} BufferEntry(const BufferEntry& be): modifiedCount(be.modifiedCount),dataSize(be.dataSize),offset(be.offset) {} BufferEntry& operator = (const BufferEntry& be) { modifiedCount=be.modifiedCount; dataSize=be.dataSize; offset=be.offset; return *this; } mutable buffered_value modifiedCount; unsigned int dataSize; unsigned int offset; }; inline bool isBufferObjectSupported(unsigned int contextID) const { return getExtensions(contextID,true)->isBufferObjectSupported(); } inline GLuint& buffer(unsigned int contextID) const { return _bufferObjectList[contextID]; } inline void bindBuffer(unsigned int contextID) const { Extensions* extensions = getExtensions(contextID,true); extensions->glBindBuffer(_target,_bufferObjectList[contextID]); } inline void unbindBuffer(unsigned int contextID) const { Extensions* extensions = getExtensions(contextID,true); extensions->glBindBuffer(_target,0); } virtual bool needsCompile(unsigned int contextID) const = 0; virtual void compileBuffer(State& state) const = 0; void releaseBuffer(State* state) const; /** Use deleteVertexBufferObject instead of glDeleteBuffers to allow * OpenGL buffer objects to be cached until they can be deleted * by the OpenGL context in which they were created, specified * by contextID.*/ static void deleteBufferObject(unsigned int contextID,GLuint globj); /** flush all the cached display list which need to be deleted * in the OpenGL context related to contextID.*/ void BufferObject::flushDeletedBufferObjects(unsigned int contextID,double /*currentTime*/, double& availableTime); /** Extensions class which encapsulates the querying of extensions and * associated function pointers, and provide convenience wrappers to * check for the extensions or use the associated functions.*/ class SG_EXPORT Extensions : public osg::Referenced { public: Extensions(); Extensions(const Extensions& rhs); void lowestCommonDenominator(const Extensions& rhs); void setupGLExtenions(); bool isBufferObjectSupported() const { return _glGenBuffers!=0; } void glGenBuffers (GLsizei n, GLuint *buffers) const; void glBindBuffer (GLenum target, GLuint buffer) const; void glBufferData (GLenum target, GLsizeiptrARB size, const GLvoid *data, GLenum usage) const; void glBufferSubData (GLenum target, GLintptrARB offset, GLsizeiptrARB size, const GLvoid *data) const; void glDeleteBuffers (GLsizei n, const GLuint *buffers) const; GLboolean glIsBuffer (GLuint buffer) const; void glGetBufferSubData (GLenum target, GLintptrARB offset, GLsizeiptrARB size, GLvoid *data) const; GLvoid* glMapBuffer (GLenum target, GLenum access) const; GLboolean glUnmapBuffer (GLenum target) const; void glGetBufferParameteriv (GLenum target, GLenum pname, GLint *params) const; void glGetBufferPointerv (GLenum target, GLenum pname, GLvoid* *params) const; protected: typedef void (APIENTRY * GenBuffersProc) (GLsizei n, GLuint *buffers); typedef void (APIENTRY * BindBufferProc) (GLenum target, GLuint buffer); typedef void (APIENTRY * BufferDataProc) (GLenum target, GLsizeiptrARB size, const GLvoid *data, GLenum usage); typedef void (APIENTRY * BufferSubDataProc) (GLenum target, GLintptrARB offset, GLsizeiptrARB size, const GLvoid *data); typedef void (APIENTRY * DeleteBuffersProc) (GLsizei n, const GLuint *buffers); typedef GLboolean (APIENTRY * IsBufferProc) (GLuint buffer); typedef void (APIENTRY * GetBufferSubDataProc) (GLenum target, GLintptrARB offset, GLsizeiptrARB size, GLvoid *data); typedef GLvoid* (APIENTRY * MapBufferProc) (GLenum target, GLenum access); typedef GLboolean (APIENTRY * UnmapBufferProc) (GLenum target); typedef void (APIENTRY * GetBufferParameterivProc) (GLenum target, GLenum pname, GLint *params); typedef void (APIENTRY * GetBufferPointervProc) (GLenum target, GLenum pname, GLvoid* *params); GenBuffersProc _glGenBuffers; BindBufferProc _glBindBuffer; BufferDataProc _glBufferData; BufferSubDataProc _glBufferSubData; DeleteBuffersProc _glDeleteBuffers; IsBufferProc _glIsBuffer; GetBufferSubDataProc _glGetBufferSubData; MapBufferProc _glMapBuffer; UnmapBufferProc _glUnmapBuffer; GetBufferParameterivProc _glGetBufferParameteriv; GetBufferPointervProc _glGetBufferPointerv; }; /** Function to call to get the extension of a specified context. * If the Exentsion object for that context has not yet been created * and the 'createIfNotInitalized' flag been set to false then returns NULL. * If 'createIfNotInitalized' is true then the Extensions object is * automatically created. However, in this case the extension object is * only created with the graphics context associated with ContextID..*/ static Extensions* getExtensions(unsigned int contextID,bool createIfNotInitalized); /** setExtensions allows users to override the extensions across graphics contexts. * typically used when you have different extensions supported across graphics pipes * but need to ensure that they all use the same low common denominator extensions.*/ static void setExtensions(unsigned int contextID,Extensions* extensions); protected: virtual ~BufferObject(); unsigned int computeRequiredTotalSize() const; typedef osg::buffered_value GLObjectList; typedef std::pair< BufferEntry, ref_ptr > BufferEntryArrayPair; typedef std::pair< BufferEntry, ref_ptr > BufferEntryPrimitiveSetPair; mutable GLObjectList _bufferObjectList; GLenum _target; GLenum _usage; mutable unsigned int _totalSize; }; class Image; class SG_EXPORT PixelBufferObject : public BufferObject { public: PixelBufferObject(osg::Image* image=0); /** Copy constructor using CopyOp to manage deep vs shallow copy.*/ PixelBufferObject(const PixelBufferObject& pbo,const CopyOp& copyop=CopyOp::SHALLOW_COPY); META_Object(osg,PixelBufferObject); typedef std::pair< BufferEntry, Image* > BufferEntryImagePair; void setImage(osg::Image* image); Image* getImage() { return _bufferEntryImagePair.second; } const Image* getImage() const { return _bufferEntryImagePair.second; } unsigned int offset() const { return _bufferEntryImagePair.first.offset; } virtual bool needsCompile(unsigned int contextID) const; virtual void compileBuffer(State& state) const; protected: virtual ~PixelBufferObject(); unsigned int computeRequiredTotalSize() const; BufferEntryImagePair _bufferEntryImagePair; }; } #endif