2006-07-18 23:21:48 +08:00
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/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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2005-02-09 18:39:45 +08:00
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#ifndef OSG_BUFFEROBJECT
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#define OSG_BUFFEROBJECT 1
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2005-04-11 23:17:24 +08:00
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#include <osg/GL>
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#include <osg/Object>
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2005-02-09 18:39:45 +08:00
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#include <osg/buffered_value>
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#ifndef GL_ARB_vertex_buffer_object
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#define GL_ARB_vertex_buffer_object
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// for compatibility with gl.h headers that don't support VBO,
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#if defined(_WIN64)
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typedef __int64 GLintptrARB;
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typedef __int64 GLsizeiptrARB;
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#elif defined(__ia64__) || defined(__x86_64__)
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typedef long int GLintptrARB;
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typedef long int GLsizeiptrARB;
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#else
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typedef int GLintptrARB;
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typedef int GLsizeiptrARB;
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#endif
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#define GL_ARRAY_BUFFER_ARB 0x8892
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#define GL_ELEMENT_ARRAY_BUFFER_ARB 0x8893
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#define GL_ARRAY_BUFFER_BINDING_ARB 0x8894
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#define GL_ELEMENT_ARRAY_BUFFER_BINDING_ARB 0x8895
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#define GL_VERTEX_ARRAY_BUFFER_BINDING_ARB 0x8896
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#define GL_NORMAL_ARRAY_BUFFER_BINDING_ARB 0x8897
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#define GL_COLOR_ARRAY_BUFFER_BINDING_ARB 0x8898
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#define GL_INDEX_ARRAY_BUFFER_BINDING_ARB 0x8899
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#define GL_TEXTURE_COORD_ARRAY_BUFFER_BINDING_ARB 0x889A
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#define GL_EDGE_FLAG_ARRAY_BUFFER_BINDING_ARB 0x889B
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#define GL_SECONDARY_COLOR_ARRAY_BUFFER_BINDING_ARB 0x889C
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#define GL_FOG_COORDINATE_ARRAY_BUFFER_BINDING_ARB 0x889D
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#define GL_WEIGHT_ARRAY_BUFFER_BINDING_ARB 0x889E
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#define GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING_ARB 0x889F
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#define GL_STREAM_DRAW_ARB 0x88E0
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#define GL_STREAM_READ_ARB 0x88E1
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#define GL_STREAM_COPY_ARB 0x88E2
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#define GL_STATIC_DRAW_ARB 0x88E4
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#define GL_STATIC_READ_ARB 0x88E5
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#define GL_STATIC_COPY_ARB 0x88E6
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#define GL_DYNAMIC_DRAW_ARB 0x88E8
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#define GL_DYNAMIC_READ_ARB 0x88E9
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#define GL_DYNAMIC_COPY_ARB 0x88EA
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#define GL_READ_ONLY_ARB 0x88B8
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#define GL_WRITE_ONLY_ARB 0x88B9
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#define GL_READ_WRITE_ARB 0x88BA
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#define GL_BUFFER_SIZE_ARB 0x8764
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#define GL_BUFFER_USAGE_ARB 0x8765
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#define GL_BUFFER_ACCESS_ARB 0x88BB
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#define GL_BUFFER_MAPPED_ARB 0x88BC
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#define GL_BUFFER_MAP_POINTER_ARB 0x88BD
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#endif
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2005-02-11 04:14:22 +08:00
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#ifndef GL_ARB_pixel_buffer_object
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#define GL_PIXEL_PACK_BUFFER_ARB 0x88EB
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#define GL_PIXEL_UNPACK_BUFFER_ARB 0x88EC
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#define GL_PIXEL_PACK_BUFFER_BINDING_ARB 0x88ED
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#define GL_PIXEL_UNPACK_BUFFER_BINDING_ARB 0x88EF
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#endif
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2005-02-09 18:39:45 +08:00
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namespace osg
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{
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2005-04-11 23:17:24 +08:00
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class State;
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2005-04-12 01:14:17 +08:00
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class OSG_EXPORT BufferObject : public Object
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2005-02-09 18:39:45 +08:00
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{
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public:
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BufferObject();
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/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
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BufferObject(const BufferObject& bo,const CopyOp& copyop=CopyOp::SHALLOW_COPY);
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virtual bool isSameKindAs(const Object* obj) const { return dynamic_cast<const BufferObject*>(obj)!=NULL; }
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virtual const char* libraryName() const { return "osg"; }
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virtual const char* className() const { return "BufferObject"; }
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2007-06-30 22:30:44 +08:00
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/** Set what type of usage the buffer object will have. Options are:
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* GL_STREAM_DRAW, GL_STREAM_READ, GL_STREAM_COPY,
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* GL_STATIC_DRAW, GL_STATIC_READ, GL_STATIC_COPY,
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* GL_DYNAMIC_DRAW, GL_DYNAMIC_READ, or GL_DYNAMIC_COPY.
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*/
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void setUsage(GLenum usage) { _usage = usage; }
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/** Get the type of usage the buffer object has been set up for.*/
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GLenum getUsage() const { return _usage; }
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2005-02-09 18:39:45 +08:00
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struct BufferEntry
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{
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BufferEntry(): dataSize(0),offset(0) {}
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BufferEntry(const BufferEntry& be): modifiedCount(be.modifiedCount),dataSize(be.dataSize),offset(be.offset) {}
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BufferEntry& operator = (const BufferEntry& be) { modifiedCount=be.modifiedCount; dataSize=be.dataSize; offset=be.offset; return *this; }
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mutable buffered_value<unsigned int> modifiedCount;
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2007-05-02 02:03:32 +08:00
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mutable unsigned int dataSize;
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mutable unsigned int offset;
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2005-02-09 18:39:45 +08:00
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};
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inline bool isBufferObjectSupported(unsigned int contextID) const { return getExtensions(contextID,true)->isBufferObjectSupported(); }
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2006-08-25 16:48:16 +08:00
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inline bool isPBOSupported(unsigned int contextID) const { return getExtensions(contextID,true)->isPBOSupported(); }
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2005-02-09 18:39:45 +08:00
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inline GLuint& buffer(unsigned int contextID) const { return _bufferObjectList[contextID]; }
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inline void bindBuffer(unsigned int contextID) const
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{
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Extensions* extensions = getExtensions(contextID,true);
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extensions->glBindBuffer(_target,_bufferObjectList[contextID]);
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}
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inline void unbindBuffer(unsigned int contextID) const
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{
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Extensions* extensions = getExtensions(contextID,true);
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extensions->glBindBuffer(_target,0);
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}
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2007-04-30 20:18:27 +08:00
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inline void dirty() { _compiledList.setAllElementsTo(0); }
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bool isDirty(unsigned int contextID) const { return _compiledList[contextID]==0; }
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2007-05-02 02:03:32 +08:00
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virtual void compileBuffer(State& state) const = 0;
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2005-02-09 18:39:45 +08:00
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2007-05-02 02:03:32 +08:00
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/** Resize any per context GLObject buffers to specified size. */
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virtual void resizeGLObjectBuffers(unsigned int maxSize);
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/** If State is non-zero, this function releases OpenGL objects for
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* the specified graphics context. Otherwise, releases OpenGL objexts
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* for all graphics contexts. */
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void releaseGLObjects(State* state=0) const;
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2005-02-09 18:39:45 +08:00
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/** Use deleteVertexBufferObject instead of glDeleteBuffers to allow
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* OpenGL buffer objects to be cached until they can be deleted
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* by the OpenGL context in which they were created, specified
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* by contextID.*/
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static void deleteBufferObject(unsigned int contextID,GLuint globj);
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/** flush all the cached display list which need to be deleted
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* in the OpenGL context related to contextID.*/
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2007-04-04 17:07:46 +08:00
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static void flushDeletedBufferObjects(unsigned int contextID,double /*currentTime*/, double& availableTime);
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2005-02-09 18:39:45 +08:00
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/** Extensions class which encapsulates the querying of extensions and
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* associated function pointers, and provide convenience wrappers to
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* check for the extensions or use the associated functions.*/
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2005-04-12 01:14:17 +08:00
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class OSG_EXPORT Extensions : public osg::Referenced
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2005-02-09 18:39:45 +08:00
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{
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public:
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2005-04-26 21:15:27 +08:00
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Extensions(unsigned int contextID);
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2005-02-09 18:39:45 +08:00
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Extensions(const Extensions& rhs);
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void lowestCommonDenominator(const Extensions& rhs);
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2007-06-28 04:36:16 +08:00
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void setupGLExtensions(unsigned int contextID);
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2005-02-09 18:39:45 +08:00
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bool isBufferObjectSupported() const { return _glGenBuffers!=0; }
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2006-08-25 16:48:16 +08:00
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bool isPBOSupported() const { return _isPBOSupported; }
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2005-02-09 18:39:45 +08:00
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void glGenBuffers (GLsizei n, GLuint *buffers) const;
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void glBindBuffer (GLenum target, GLuint buffer) const;
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void glBufferData (GLenum target, GLsizeiptrARB size, const GLvoid *data, GLenum usage) const;
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void glBufferSubData (GLenum target, GLintptrARB offset, GLsizeiptrARB size, const GLvoid *data) const;
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void glDeleteBuffers (GLsizei n, const GLuint *buffers) const;
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GLboolean glIsBuffer (GLuint buffer) const;
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void glGetBufferSubData (GLenum target, GLintptrARB offset, GLsizeiptrARB size, GLvoid *data) const;
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GLvoid* glMapBuffer (GLenum target, GLenum access) const;
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GLboolean glUnmapBuffer (GLenum target) const;
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void glGetBufferParameteriv (GLenum target, GLenum pname, GLint *params) const;
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void glGetBufferPointerv (GLenum target, GLenum pname, GLvoid* *params) const;
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protected:
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typedef void (APIENTRY * GenBuffersProc) (GLsizei n, GLuint *buffers);
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typedef void (APIENTRY * BindBufferProc) (GLenum target, GLuint buffer);
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typedef void (APIENTRY * BufferDataProc) (GLenum target, GLsizeiptrARB size, const GLvoid *data, GLenum usage);
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typedef void (APIENTRY * BufferSubDataProc) (GLenum target, GLintptrARB offset, GLsizeiptrARB size, const GLvoid *data);
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typedef void (APIENTRY * DeleteBuffersProc) (GLsizei n, const GLuint *buffers);
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typedef GLboolean (APIENTRY * IsBufferProc) (GLuint buffer);
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typedef void (APIENTRY * GetBufferSubDataProc) (GLenum target, GLintptrARB offset, GLsizeiptrARB size, GLvoid *data);
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typedef GLvoid* (APIENTRY * MapBufferProc) (GLenum target, GLenum access);
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typedef GLboolean (APIENTRY * UnmapBufferProc) (GLenum target);
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typedef void (APIENTRY * GetBufferParameterivProc) (GLenum target, GLenum pname, GLint *params);
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typedef void (APIENTRY * GetBufferPointervProc) (GLenum target, GLenum pname, GLvoid* *params);
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GenBuffersProc _glGenBuffers;
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BindBufferProc _glBindBuffer;
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BufferDataProc _glBufferData;
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BufferSubDataProc _glBufferSubData;
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DeleteBuffersProc _glDeleteBuffers;
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IsBufferProc _glIsBuffer;
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GetBufferSubDataProc _glGetBufferSubData;
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MapBufferProc _glMapBuffer;
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UnmapBufferProc _glUnmapBuffer;
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GetBufferParameterivProc _glGetBufferParameteriv;
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GetBufferPointervProc _glGetBufferPointerv;
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2006-08-25 16:48:16 +08:00
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bool _isPBOSupported;
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2005-02-09 18:39:45 +08:00
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};
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/** Function to call to get the extension of a specified context.
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* If the Exentsion object for that context has not yet been created
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* and the 'createIfNotInitalized' flag been set to false then returns NULL.
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* If 'createIfNotInitalized' is true then the Extensions object is
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* automatically created. However, in this case the extension object is
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* only created with the graphics context associated with ContextID..*/
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static Extensions* getExtensions(unsigned int contextID,bool createIfNotInitalized);
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/** setExtensions allows users to override the extensions across graphics contexts.
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* typically used when you have different extensions supported across graphics pipes
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* but need to ensure that they all use the same low common denominator extensions.*/
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static void setExtensions(unsigned int contextID,Extensions* extensions);
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protected:
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virtual ~BufferObject();
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typedef osg::buffered_value<GLuint> GLObjectList;
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2007-04-30 20:18:27 +08:00
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typedef osg::buffered_value<unsigned int> CompiledList;
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2005-02-09 18:39:45 +08:00
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mutable GLObjectList _bufferObjectList;
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2007-04-30 20:18:27 +08:00
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mutable CompiledList _compiledList;
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2005-02-09 18:39:45 +08:00
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GLenum _target;
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GLenum _usage;
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mutable unsigned int _totalSize;
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};
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2007-04-26 02:50:11 +08:00
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class Array;
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class OSG_EXPORT VertexBufferObject : public BufferObject
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{
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public:
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VertexBufferObject();
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/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
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VertexBufferObject(const VertexBufferObject& vbo,const CopyOp& copyop=CopyOp::SHALLOW_COPY);
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META_Object(osg,VertexBufferObject);
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typedef std::pair< BufferEntry, Array* > BufferEntryArrayPair;
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typedef std::vector< BufferEntryArrayPair > BufferEntryArrayPairs;
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unsigned int addArray(osg::Array* array);
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2007-05-02 02:03:32 +08:00
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void removeArray(osg::Array* array);
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2007-04-26 02:50:11 +08:00
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void setArray(unsigned int i, Array* array);
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Array* getArray(unsigned int i) { return _bufferEntryArrayPairs[i].second; }
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const Array* getArray(unsigned int i) const { return _bufferEntryArrayPairs[i].second; }
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2007-05-17 18:59:05 +08:00
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const GLvoid* getOffset(unsigned int i) const { return (const GLvoid*)(((char *)0)+(_bufferEntryArrayPairs[i].first.offset)); }
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2007-04-29 16:12:29 +08:00
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2007-05-02 02:03:32 +08:00
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virtual void compileBuffer(State& state) const;
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2007-04-26 02:50:11 +08:00
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2007-05-02 02:03:32 +08:00
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/** Resize any per context GLObject buffers to specified size. */
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virtual void resizeGLObjectBuffers(unsigned int maxSize);
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2007-04-26 02:50:11 +08:00
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protected:
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virtual ~VertexBufferObject();
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BufferEntryArrayPairs _bufferEntryArrayPairs;
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};
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class DrawElements;
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2007-05-01 14:28:20 +08:00
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class OSG_EXPORT ElementBufferObject : public BufferObject
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2007-04-26 02:50:11 +08:00
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{
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public:
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2007-05-01 14:28:20 +08:00
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ElementBufferObject();
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2007-04-26 02:50:11 +08:00
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/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
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2007-05-01 14:28:20 +08:00
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ElementBufferObject(const ElementBufferObject& pbo,const CopyOp& copyop=CopyOp::SHALLOW_COPY);
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2007-04-26 02:50:11 +08:00
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2007-05-01 14:28:20 +08:00
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META_Object(osg,ElementBufferObject);
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2007-04-26 02:50:11 +08:00
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typedef std::pair< BufferEntry, DrawElements* > BufferEntryDrawElementstPair;
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typedef std::vector< BufferEntryDrawElementstPair > BufferEntryDrawElementsPairs;
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unsigned int addDrawElements(osg::DrawElements* PrimitiveSet);
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2007-05-02 02:03:32 +08:00
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void removeDrawElements(osg::DrawElements* PrimitiveSet);
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2007-04-26 02:50:11 +08:00
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void setDrawElements(unsigned int i, DrawElements* PrimitiveSet);
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DrawElements* getDrawElements(unsigned int i) { return _bufferEntryDrawElementsPairs[i].second; }
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const DrawElements* getDrawElements(unsigned int i) const { return _bufferEntryDrawElementsPairs[i].second; }
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2007-05-17 18:59:05 +08:00
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const GLvoid* getOffset(unsigned int i) const { return (const GLvoid*)(((char *)0)+(_bufferEntryDrawElementsPairs[i].first.offset)); }
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2007-04-29 16:12:29 +08:00
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2007-05-02 02:03:32 +08:00
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virtual void compileBuffer(State& state) const;
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2007-04-26 02:50:11 +08:00
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2007-05-02 02:03:32 +08:00
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/** Resize any per context GLObject buffers to specified size. */
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virtual void resizeGLObjectBuffers(unsigned int maxSize);
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2007-04-26 02:50:11 +08:00
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protected:
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2007-05-01 14:28:20 +08:00
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virtual ~ElementBufferObject();
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2007-04-26 02:50:11 +08:00
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BufferEntryDrawElementsPairs _bufferEntryDrawElementsPairs;
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};
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2005-02-09 18:39:45 +08:00
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class Image;
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2005-04-12 01:14:17 +08:00
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class OSG_EXPORT PixelBufferObject : public BufferObject
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2005-02-09 18:39:45 +08:00
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{
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public:
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PixelBufferObject(osg::Image* image=0);
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/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
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PixelBufferObject(const PixelBufferObject& pbo,const CopyOp& copyop=CopyOp::SHALLOW_COPY);
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META_Object(osg,PixelBufferObject);
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typedef std::pair< BufferEntry, Image* > BufferEntryImagePair;
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void setImage(osg::Image* image);
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Image* getImage() { return _bufferEntryImagePair.second; }
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const Image* getImage() const { return _bufferEntryImagePair.second; }
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unsigned int offset() const { return _bufferEntryImagePair.first.offset; }
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2007-05-02 02:03:32 +08:00
|
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virtual void compileBuffer(State& state) const;
|
2005-02-09 18:39:45 +08:00
|
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|
2007-05-02 02:03:32 +08:00
|
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/** Resize any per context GLObject buffers to specified size. */
|
|
|
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virtual void resizeGLObjectBuffers(unsigned int maxSize);
|
2005-02-09 18:39:45 +08:00
|
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protected:
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virtual ~PixelBufferObject();
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BufferEntryImagePair _bufferEntryImagePair;
|
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};
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}
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#endif
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