FGFS-4.1/OpenSceneGraph
4
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
3bfa8a27a8
OpenSceneGraph/include/osg/BufferObject
Robert Osfield 0900857333 From Farshid Lashkari, 
"I was experiencing hard crashes of my application when using PBO's on
machines that don't support PBO's. I think osg incorrectly checks if
PBO's are supported.

I added a new method to the BufferObject::Extensions class which
returns if the "GL_ARB_pixel_buffer_object" string is supported. This
fixes the problem on my end. Machines without PBO support will
continue to work and machines with PBO support will still be able to
use it."
2006-08-25 08:48:16 +00:00

265 lines
11 KiB
C++
Raw Blame History

/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 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 <osg/GL>
#include <osg/Object>
#include <osg/buffered_value>
#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_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_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
#ifndef GL_ARB_pixel_buffer_object
#define GL_PIXEL_PACK_BUFFER_ARB 0x88EB
#define GL_PIXEL_UNPACK_BUFFER_ARB 0x88EC
#define GL_PIXEL_PACK_BUFFER_BINDING_ARB 0x88ED
#define GL_PIXEL_UNPACK_BUFFER_BINDING_ARB 0x88EF
#endif
namespace osg
{
class State;
class OSG_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<const BufferObject*>(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<unsigned int> modifiedCount;
unsigned int dataSize;
unsigned int offset;
};
inline bool isBufferObjectSupported(unsigned int contextID) const { return getExtensions(contextID,true)->isBufferObjectSupported(); }
inline bool isPBOSupported(unsigned int contextID) const { return getExtensions(contextID,true)->isPBOSupported(); }
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 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 OSG_EXPORT Extensions : public osg::Referenced
{
public:
Extensions(unsigned int contextID);
Extensions(const Extensions& rhs);
void lowestCommonDenominator(const Extensions& rhs);
void setupGLExtenions(unsigned int contextID);
bool isBufferObjectSupported() const { return _glGenBuffers!=0; }
bool isPBOSupported() const { return _isPBOSupported; }
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;
bool _isPBOSupported;
};
/** 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();
typedef osg::buffered_value<GLuint> GLObjectList;
typedef std::pair< BufferEntry, ref_ptr<Array> > BufferEntryArrayPair;
typedef std::pair< BufferEntry, ref_ptr<PrimitiveSet> > BufferEntryPrimitiveSetPair;
mutable GLObjectList _bufferObjectList;
GLenum _target;
GLenum _usage;
mutable unsigned int _totalSize;
};
class Image;
class OSG_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();
BufferEntryImagePair _bufferEntryImagePair;
};
}
#endif
Reference in New Issue View Git Blame Copy Permalink