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Ogre::GLHardwareBufferManager Class Reference

Implementation of HardwareBufferManager for OpenGL. More...

#include <OgreGLHardwareBufferManager.h>

Inheritance diagram for Ogre::GLHardwareBufferManager:

Ogre::HardwareBufferManager Ogre::Singleton< HardwareBufferManager > List of all members.

Public Types

enum  BufferLicenseType { BLT_MANUAL_RELEASE, BLT_AUTOMATIC_RELEASE }

Public Member Functions

 GLHardwareBufferManager ()
 ~GLHardwareBufferManager ()
HardwareVertexBufferSharedPtr createVertexBuffer (size_t vertexSize, size_t numVerts, HardwareBuffer::Usage usage, bool useShadowBuffer=false)
 Creates a vertex buffer.

HardwareIndexBufferSharedPtr createIndexBuffer (HardwareIndexBuffer::IndexType itype, size_t numIndexes, HardwareBuffer::Usage usage, bool useShadowBuffer=false)
 Create a hardware vertex buffer.

virtual VertexDeclaration * createVertexDeclaration (void)
 Creates a new vertex declaration.

virtual void destroyVertexDeclaration (VertexDeclaration *decl)
 Destroys a vertex declaration.

virtual VertexBufferBinding * createVertexBufferBinding (void)
 Creates a new VertexBufferBinding.

virtual void destroyVertexBufferBinding (VertexBufferBinding *binding)
 Destroys a VertexBufferBinding.

virtual void registerVertexBufferSourceAndCopy (const HardwareVertexBufferSharedPtr &sourceBuffer, const HardwareVertexBufferSharedPtr &copy)
 Registers a vertex buffer as a copy of another.

virtual HardwareVertexBufferSharedPtr allocateVertexBufferCopy (const HardwareVertexBufferSharedPtr &sourceBuffer, BufferLicenseType licenseType, HardwareBufferLicensee *licensee, bool copyData=false)
 Allocates a copy of a given vertex buffer.

virtual void releaseVertexBufferCopy (const HardwareVertexBufferSharedPtr &bufferCopy)
 Manually release a vertex buffer copy for others to subsequently use.

virtual void touchVertexBufferCopy (const HardwareVertexBufferSharedPtr &bufferCopy)
 Tell engine that the vertex buffer copy intent to reuse.

virtual void _freeUnusedBufferCopies (void)
 Free all unused vertex buffer copies.

virtual void _releaseBufferCopies (bool forceFreeUnused=false)
 Internal method for releasing all temporary buffers which have been allocated using BLT_AUTOMATIC_RELEASE; is called by OGRE.

virtual void _forceReleaseBufferCopies (const HardwareVertexBufferSharedPtr &sourceBuffer)
 Internal method that forces the release of copies of a given buffer.

virtual void _forceReleaseBufferCopies (HardwareVertexBuffer *sourceBuffer)
 Internal method that forces the release of copies of a given buffer.

void _notifyVertexBufferDestroyed (HardwareVertexBuffer *buf)
 Notification that a hardware vertex buffer has been destroyed.

void _notifyIndexBufferDestroyed (HardwareIndexBuffer *buf)
 Notification that a hardware index buffer has been destroyed.


Static Public Member Functions

GLenum getGLUsage (unsigned int usage)
 Utility function to get the correct GL usage based on HBU's.

GLenum getGLType (unsigned int type)
 Utility function to get the correct GL type based on VET's.

HardwareBufferManager & getSingleton (void)
 Override standard Singleton retrieval.

HardwareBufferManager * getSingletonPtr (void)
 Override standard Singleton retrieval.


Protected Types

typedef std::set< HardwareVertexBuffer * > VertexBufferList
 WARNING: The following two members should place before all other members.

typedef std::set< HardwareIndexBuffer * > IndexBufferList
typedef std::set< VertexDeclaration * > VertexDeclarationList
typedef std::set< VertexBufferBinding * > VertexBufferBindingList
typedef std::multimap< HardwareVertexBuffer *,
HardwareVertexBufferSharedPtr > 		FreeTemporaryVertexBufferMap
 Map from original buffer to temporary buffers.

typedef std::map< HardwareVertexBuffer *,
VertexBufferLicense > 		TemporaryVertexBufferLicenseMap
 Map from temporary buffer to details of a license.


Protected Member Functions

virtual void destroyAllDeclarations (void)
 Internal method for destroys all vertex declarations.

virtual void destroyAllBindings (void)
 Internal method for destroys all vertex buffer bindings.

virtual VertexDeclaration * createVertexDeclarationImpl (void)
 Internal method for creates a new vertex declaration, may be overridden by certain rendering APIs.

virtual void destroyVertexDeclarationImpl (VertexDeclaration *decl)
 Internal method for destroys a vertex declaration, may be overridden by certain rendering APIs.

virtual VertexBufferBinding * createVertexBufferBindingImpl (void)
 Internal method for creates a new VertexBufferBinding, may be overridden by certain rendering APIs.

virtual void destroyVertexBufferBindingImpl (VertexBufferBinding *binding)
 Internal method for destroys a VertexBufferBinding, may be overridden by certain rendering APIs.

HardwareVertexBufferSharedPtr makeBufferCopy (const HardwareVertexBufferSharedPtr &source, HardwareBuffer::Usage usage, bool useShadowBuffer)
 Creates a new buffer as a copy of the source, does not copy data.


Protected Attributes

VertexBufferList mVertexBuffers
IndexBufferList mIndexBuffers
VertexDeclarationList mVertexDeclarations
VertexBufferBindingList mVertexBufferBindings
FreeTemporaryVertexBufferMap mFreeTempVertexBufferMap
 Map of current available temp buffers.

TemporaryVertexBufferLicenseMap mTempVertexBufferLicenses
 Map of currently licensed temporary buffers.

size_t mUnderUsedFrameCount
 Number of frames elapsed since temporary buffers utilization was above half the available.


Static Protected Attributes

const size_t UNDER_USED_FRAME_THRESHOLD
 Number of frames to wait before free unused temporary buffers.

const size_t EXPIRED_DELAY_FRAME_THRESHOLD
 Frame delay for BLT_AUTOMATIC_RELEASE temporary buffers.

HardwareBufferManager * ms_Singleton

Detailed Description

Implementation of HardwareBufferManager for OpenGL.

Definition at line 34 of file OgreGLHardwareBufferManager.h.

Member Typedef Documentation

typedef std::multimap<HardwareVertexBuffer*, HardwareVertexBufferSharedPtr> Ogre::HardwareBufferManager::FreeTemporaryVertexBufferMap [protected, inherited]
 

Map from original buffer to temporary buffers.

Definition at line 164 of file OgreHardwareBufferManager.h.

typedef std::set<HardwareIndexBuffer*> Ogre::HardwareBufferManager::IndexBufferList [protected, inherited]
 

Definition at line 102 of file OgreHardwareBufferManager.h.

typedef std::map<HardwareVertexBuffer*, VertexBufferLicense> Ogre::HardwareBufferManager::TemporaryVertexBufferLicenseMap [protected, inherited]
 

Map from temporary buffer to details of a license.

Definition at line 168 of file OgreHardwareBufferManager.h.

typedef std::set<VertexBufferBinding*> Ogre::HardwareBufferManager::VertexBufferBindingList [protected, inherited]
 

Definition at line 108 of file OgreHardwareBufferManager.h.

typedef std::set<HardwareVertexBuffer*> Ogre::HardwareBufferManager::VertexBufferList [protected, inherited]
 

WARNING: The following two members should place before all other members.

Members destruct order is very important here, because destructing other members will cause notify back to this class, and then will access to this two members.

Definition at line 101 of file OgreHardwareBufferManager.h.

typedef std::set<VertexDeclaration*> Ogre::HardwareBufferManager::VertexDeclarationList [protected, inherited]
 

Definition at line 107 of file OgreHardwareBufferManager.h.

Member Enumeration Documentation

enum Ogre::HardwareBufferManager::BufferLicenseType [inherited]
 

Enumeration values:
BLT_MANUAL_RELEASE  Licensee will only release buffer when it says so.
BLT_AUTOMATIC_RELEASE  Licensee can have license revoked.

Definition at line 130 of file OgreHardwareBufferManager.h.

Constructor & Destructor Documentation

Ogre::GLHardwareBufferManager::GLHardwareBufferManager (   ) 
 

Ogre::GLHardwareBufferManager::~GLHardwareBufferManager (   ) 
 

Member Function Documentation

virtual void Ogre::HardwareBufferManager::_forceReleaseBufferCopies (  HardwareVertexBuffer *  sourceBuffer  )  [virtual, inherited]
 

Internal method that forces the release of copies of a given buffer.

Remarks:
This usually means that the buffer which the copies are based on has been changed in some fundamental way, and the owner of the original wishes to make that known so that new copies will reflect the changes.
Parameters:
sourceBuffer the source buffer as a pointer. Any buffer copies created from the source buffer are deleted.

virtual void Ogre::HardwareBufferManager::_forceReleaseBufferCopies (  const HardwareVertexBufferSharedPtr &  sourceBuffer  )  [virtual, inherited]
 

Internal method that forces the release of copies of a given buffer.

Remarks:
This usually means that the buffer which the copies are based on has been changed in some fundamental way, and the owner of the original wishes to make that known so that new copies will reflect the changes.
Parameters:
sourceBuffer the source buffer as a shared pointer. Any buffer copies created from the source buffer are deleted.

virtual void Ogre::HardwareBufferManager::_freeUnusedBufferCopies (  void   )  [virtual, inherited]
 

Free all unused vertex buffer copies.

Remarks:
This method free all temporary vertex buffers that not in used. In normally, temporary vertex buffers are subsequently stored and can be made available for other purposes later without incurring the cost of construction / destruction. But in some cases you want to free them to save hardware memory (e.g. application was runs in a long time, you might free temporary buffers periodically to avoid memory overload).

void Ogre::HardwareBufferManager::_notifyIndexBufferDestroyed (  HardwareIndexBuffer *  buf  )  [inherited]
 

Notification that a hardware index buffer has been destroyed.

void Ogre::HardwareBufferManager::_notifyVertexBufferDestroyed (  HardwareVertexBuffer *  buf  )  [inherited]
 

Notification that a hardware vertex buffer has been destroyed.

virtual void Ogre::HardwareBufferManager::_releaseBufferCopies (  bool  forceFreeUnused = false  )  [virtual, inherited]
 

Internal method for releasing all temporary buffers which have been allocated using BLT_AUTOMATIC_RELEASE; is called by OGRE.

Parameters:
forceFreeUnused If true, free all unused temporary buffers. If false, auto detect and free all unused temporary buffers based on temporary buffers utilization.

virtual HardwareVertexBufferSharedPtr Ogre::HardwareBufferManager::allocateVertexBufferCopy (  const HardwareVertexBufferSharedPtr &  sourceBuffer,
BufferLicenseType  licenseType,
HardwareBufferLicensee *  licensee,
bool  copyData = false
)  [virtual, inherited]
 

Allocates a copy of a given vertex buffer.

Remarks:
This method allocates a temporary copy of an existing vertex buffer. This buffer is subsequently stored and can be made available for other purposes later without incurring the cost of construction / destruction.
Parameters:
sourceBuffer The source buffer to use as a copy
licenseType The type of license required on this buffer - automatic release causes this class to release licenses every frame so that they can be reallocated anew.
licensee Pointer back to the class requesting the copy, which must implement HardwareBufferLicense in order to be notified when the license expires.
copyData If true, the current data is copied as well as the structure of the buffer

HardwareIndexBufferSharedPtr Ogre::GLHardwareBufferManager::createIndexBuffer (  HardwareIndexBuffer::IndexType  itype,
size_t  numIndexes,
HardwareBuffer::Usage  usage,
bool  useShadowBuffer = false
)  [virtual]
 

Create a hardware vertex buffer.

Implements Ogre::HardwareBufferManager.

HardwareVertexBufferSharedPtr Ogre::GLHardwareBufferManager::createVertexBuffer (  size_t  vertexSize,
size_t  numVerts,
HardwareBuffer::Usage  usage,
bool  useShadowBuffer = false
)  [virtual]
 

Creates a vertex buffer.

Implements Ogre::HardwareBufferManager.

virtual VertexBufferBinding* Ogre::HardwareBufferManager::createVertexBufferBinding (  void   )  [virtual, inherited]
 

Creates a new VertexBufferBinding.

virtual VertexBufferBinding* Ogre::HardwareBufferManager::createVertexBufferBindingImpl (  void   )  [protected, virtual, inherited]
 

Internal method for creates a new VertexBufferBinding, may be overridden by certain rendering APIs.

virtual VertexDeclaration* Ogre::HardwareBufferManager::createVertexDeclaration (  void   )  [virtual, inherited]
 

Creates a new vertex declaration.

virtual VertexDeclaration* Ogre::HardwareBufferManager::createVertexDeclarationImpl (  void   )  [protected, virtual, inherited]
 

Internal method for creates a new vertex declaration, may be overridden by certain rendering APIs.

Reimplemented in Ogre::D3D9HardwareBufferManager.

virtual void Ogre::HardwareBufferManager::destroyAllBindings (  void   )  [protected, virtual, inherited]
 

Internal method for destroys all vertex buffer bindings.

virtual void Ogre::HardwareBufferManager::destroyAllDeclarations (  void   )  [protected, virtual, inherited]
 

Internal method for destroys all vertex declarations.

virtual void Ogre::HardwareBufferManager::destroyVertexBufferBinding (  VertexBufferBinding *  binding  )  [virtual, inherited]
 

Destroys a VertexBufferBinding.

virtual void Ogre::HardwareBufferManager::destroyVertexBufferBindingImpl (  VertexBufferBinding *  binding  )  [protected, virtual, inherited]
 

Internal method for destroys a VertexBufferBinding, may be overridden by certain rendering APIs.

virtual void Ogre::HardwareBufferManager::destroyVertexDeclaration (  VertexDeclaration *  decl  )  [virtual, inherited]
 

Destroys a vertex declaration.

virtual void Ogre::HardwareBufferManager::destroyVertexDeclarationImpl (  VertexDeclaration *  decl  )  [protected, virtual, inherited]
 

Internal method for destroys a vertex declaration, may be overridden by certain rendering APIs.

Reimplemented in Ogre::D3D9HardwareBufferManager.

GLenum Ogre::GLHardwareBufferManager::getGLType (  unsigned int  type  )  [static]
 

Utility function to get the correct GL type based on VET's.

GLenum Ogre::GLHardwareBufferManager::getGLUsage (  unsigned int  usage  )  [static]
 

Utility function to get the correct GL usage based on HBU's.

HardwareBufferManager& Ogre::HardwareBufferManager::getSingleton (  void   )  [static, inherited]
 

Override standard Singleton retrieval.

Remarks:
Why do we do this? Well, it's because the Singleton implementation is in a .h file, which means it gets compiled into anybody who includes it. This is needed for the Singleton template to work, but we actually only want it compiled into the implementation of the class based on the Singleton, not all of them. If we don't change this, we get link errors when trying to use the Singleton-based class from an outside dll.
This method just delegates to the template version anyway, but the implementation stays in this single compilation unit, preventing link errors.

Reimplemented from Ogre::Singleton< HardwareBufferManager >.

HardwareBufferManager* Ogre::HardwareBufferManager::getSingletonPtr (  void   )  [static, inherited]
 

Override standard Singleton retrieval.

Remarks:
Why do we do this? Well, it's because the Singleton implementation is in a .h file, which means it gets compiled into anybody who includes it. This is needed for the Singleton template to work, but we actually only want it compiled into the implementation of the class based on the Singleton, not all of them. If we don't change this, we get link errors when trying to use the Singleton-based class from an outside dll.
This method just delegates to the template version anyway, but the implementation stays in this single compilation unit, preventing link errors.

Reimplemented from Ogre::Singleton< HardwareBufferManager >.

HardwareVertexBufferSharedPtr Ogre::HardwareBufferManager::makeBufferCopy (  const HardwareVertexBufferSharedPtr &  source,
HardwareBuffer::Usage  usage,
bool  useShadowBuffer
)  [protected, inherited]
 

Creates a new buffer as a copy of the source, does not copy data.

virtual void Ogre::HardwareBufferManager::registerVertexBufferSourceAndCopy (  const HardwareVertexBufferSharedPtr &  sourceBuffer,
const HardwareVertexBufferSharedPtr &  copy
)  [virtual, inherited]
 

Registers a vertex buffer as a copy of another.

Remarks:
This is useful for registering an existing buffer as a temporary buffer which can be allocated just like a copy.

virtual void Ogre::HardwareBufferManager::releaseVertexBufferCopy (  const HardwareVertexBufferSharedPtr &  bufferCopy  )  [virtual, inherited]
 

Manually release a vertex buffer copy for others to subsequently use.

Remarks:
Only required if the original call to allocateVertexBufferCopy included a licenseType of BLT_MANUAL_RELEASE.
Parameters:
bufferCopy The buffer copy. The caller is expected to delete or at least no longer use this reference, since another user may well begin to modify the contents of the buffer.

virtual void Ogre::HardwareBufferManager::touchVertexBufferCopy (  const HardwareVertexBufferSharedPtr &  bufferCopy  )  [virtual, inherited]
 

Tell engine that the vertex buffer copy intent to reuse.

Remarks:
Ogre internal keep an expired delay counter of BLT_AUTOMATIC_RELEASE buffers, when the counter count down to zero, it'll release for other purposes later. But you can use this function to reset the counter to the internal configured value, keep the buffer not get released for some frames.
Parameters:
bufferCopy The buffer copy. The caller is expected to keep this buffer copy for use.

Member Data Documentation

const size_t Ogre::HardwareBufferManager::EXPIRED_DELAY_FRAME_THRESHOLD [static, protected, inherited]
 

Frame delay for BLT_AUTOMATIC_RELEASE temporary buffers.

Definition at line 176 of file OgreHardwareBufferManager.h.

FreeTemporaryVertexBufferMap Ogre::HardwareBufferManager::mFreeTempVertexBufferMap [protected, inherited]
 

Map of current available temp buffers.

Definition at line 166 of file OgreHardwareBufferManager.h.

IndexBufferList Ogre::HardwareBufferManager::mIndexBuffers [protected, inherited]
 

Definition at line 104 of file OgreHardwareBufferManager.h.

HardwareBufferManager * Ogre::Singleton< HardwareBufferManager >::ms_Singleton [static, protected, inherited]
 

Definition at line 54 of file OgreSingleton.h.

TemporaryVertexBufferLicenseMap Ogre::HardwareBufferManager::mTempVertexBufferLicenses [protected, inherited]
 

Map of currently licensed temporary buffers.

Definition at line 170 of file OgreHardwareBufferManager.h.

size_t Ogre::HardwareBufferManager::mUnderUsedFrameCount [protected, inherited]
 

Number of frames elapsed since temporary buffers utilization was above half the available.

Definition at line 172 of file OgreHardwareBufferManager.h.

VertexBufferBindingList Ogre::HardwareBufferManager::mVertexBufferBindings [protected, inherited]
 

Definition at line 110 of file OgreHardwareBufferManager.h.

VertexBufferList Ogre::HardwareBufferManager::mVertexBuffers [protected, inherited]
 

Definition at line 103 of file OgreHardwareBufferManager.h.

VertexDeclarationList Ogre::HardwareBufferManager::mVertexDeclarations [protected, inherited]
 

Definition at line 109 of file OgreHardwareBufferManager.h.

const size_t Ogre::HardwareBufferManager::UNDER_USED_FRAME_THRESHOLD [static, protected, inherited]
 

Number of frames to wait before free unused temporary buffers.

Definition at line 174 of file OgreHardwareBufferManager.h.

The documentation for this class was generated from the following file:

Copyright © 2000-2005 by The OGRE Team
Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 2.5 License.
Last modified Sun Mar 12 14:52:36 2006