GLHardwareBufferManagerBase as a Singleton. More...

#include <OgreGLHardwareBufferManager.h>

Inheritance diagram for Ogre::GLHardwareBufferManager:

Public Types
enum	BufferLicenseType { BLT_MANUAL_RELEASE, BLT_AUTOMATIC_RELEASE }

Public Member Functions
	GLHardwareBufferManager ()

	~GLHardwareBufferManager ()

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

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

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

void	_notifyConterBufferDestroyed (HardwareCounterBuffer *buf)
	Notification that at hardware counter buffer has been destroyed. More...

void	_notifyCounterBufferDestroyed (HardwareCounterBuffer *buf)
	Notification that at hardware counter buffer has been destroyed. More...

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

void	_notifyUniformBufferDestroyed (HardwareUniformBuffer *buf)
	Notification that at hardware uniform buffer has been destroyed. More...

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

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. More...

void *	allocateScratch (uint32 size)
	Allocator method to allow us to use a pool of memory as a scratch area for hardware buffers. More...

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

HardwareCounterBufferSharedPtr	createCounterBuffer (size_t sizeBytes, HardwareBuffer::Usage usage, bool useShadowBuffer, const String &name="")
	Create counter buffer. More...

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

RenderToVertexBufferSharedPtr	createRenderToVertexBuffer ()
	Create a render to vertex buffer. More...

HardwareUniformBufferSharedPtr	createUniformBuffer (size_t sizeBytes, HardwareBuffer::Usage usage, bool useShadowBuffer, const String &name="")
	Create uniform buffer. More...

HardwareVertexBufferSharedPtr	createVertexBuffer (size_t vertexSize, size_t numVerts, HardwareBuffer::Usage usage, bool useShadowBuffer=false)
	Create a hardware vertex buffer. More...

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

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

void	deallocateScratch (void *ptr)

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

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

size_t	getGLMapBufferThreshold () const
	Threshold after which glMapBuffer is used and not glBufferSubData. More...

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

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

void	setGLMapBufferThreshold (const size_t value)

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

Static Public Member Functions
static GLenum	getGLType (unsigned int type)
	Utility function to get the correct GL type based on VET's. More...

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

static HardwareBufferManager &	getSingleton (void)
	Get the singleton instance. More...

static HardwareBufferManager *	getSingletonPtr (void)
	Get the singleton instance. More...

Detailed Description

GLHardwareBufferManagerBase as a Singleton.

Member Enumeration Documentation

◆ BufferLicenseType

enum Ogre::HardwareBufferManagerBase::BufferLicenseType

inherited

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

Constructor & Destructor Documentation

◆ GLHardwareBufferManager()

Ogre::GLHardwareBufferManager::GLHardwareBufferManager ( )

inline

◆ ~GLHardwareBufferManager()

Ogre::GLHardwareBufferManager::~GLHardwareBufferManager ( )

inline

References OGRE_DELETE.

Member Function Documentation

◆ getGLUsage()

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

inlinestatic

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

References Ogre::GLHardwareBufferManagerBase::getGLUsage().

◆ getGLType()

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

inlinestatic

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

References Ogre::GLHardwareBufferManagerBase::getGLType().

◆ allocateScratch()

void* Ogre::GLHardwareBufferManager::allocateScratch ( uint32 size )

inline

Allocator method to allow us to use a pool of memory as a scratch area for hardware buffers.

This is because glMapBuffer is incredibly inefficient, seemingly no matter what options we give it. So for the period of lock/unlock, we will instead allocate a section of a local memory pool, and use glBufferSubDataARB / glGetBufferSubDataARB instead.

◆ deallocateScratch()

void Ogre::GLHardwareBufferManager::deallocateScratch ( void * ptr )

inline

See also: allocateScratch

◆ getGLMapBufferThreshold()

size_t Ogre::GLHardwareBufferManager::getGLMapBufferThreshold ( ) const

inline

Threshold after which glMapBuffer is used and not glBufferSubData.

◆ setGLMapBufferThreshold()

void Ogre::GLHardwareBufferManager::setGLMapBufferThreshold ( const size_t value )

inline

◆ createVertexBuffer()

HardwareVertexBufferSharedPtr Ogre::HardwareBufferManager::createVertexBuffer	(	size_t	vertexSize,
		size_t	numVerts,
		HardwareBuffer::Usage	usage,
		bool	useShadowBuffer = `false`
	)

inlinevirtualinherited

Create a hardware vertex buffer.

Remarks: This method creates a new vertex buffer; this will act as a source of geometry data for rendering objects. Note that because the meaning of the contents of the vertex buffer depends on the usage, this method does not specify a vertex format; the user of this buffer can actually insert whatever data they wish, in any format. However, in order to use this with a RenderOperation, the data in this vertex buffer will have to be associated with a semantic element of the rendering pipeline, e.g. a position, or texture coordinates. This is done using the VertexDeclaration class, which itself contains VertexElement structures referring to the source data.; Note that because vertex buffers can be shared, they are reference counted so you do not need to worry about destroying themm this will be done automatically.

Parameters

vertexSize	The size in bytes of each vertex in this buffer; you must calculate this based on the kind of data you expect to populate this buffer with.
numVerts	The number of vertices in this buffer.
usage	One or more members of the HardwareBuffer::Usage enumeration; you are strongly advised to use HBU_STATIC_WRITE_ONLY wherever possible, if you need to update regularly, consider HBU_DYNAMIC_WRITE_ONLY and useShadowBuffer=true.
useShadowBuffer	If set to `true`, this buffer will be 'shadowed' by one stored in system memory rather than GPU or AGP memory. You should set this flag if you intend to read data back from the vertex buffer, because reading data from a buffer in the GPU or AGP memory is very expensive, and is in fact impossible if you specify HBU_WRITE_ONLY for the main buffer. If you use this option, all reads and writes will be done to the shadow buffer, and the shadow buffer will be synchronised with the real buffer at an appropriate time.

Implements Ogre::HardwareBufferManagerBase.

References Ogre::HardwareBufferManagerBase::createVertexBuffer().

Referenced by Ogre::Lod0Stripifier::~Lod0Stripifier().

◆ createIndexBuffer()

HardwareIndexBufferSharedPtr Ogre::HardwareBufferManager::createIndexBuffer	(	HardwareIndexBuffer::IndexType	itype,
		size_t	numIndexes,
		HardwareBuffer::Usage	usage,
		bool	useShadowBuffer = `false`
	)

inlinevirtualinherited

Create a hardware index buffer.

Remarks: Note that because buffers can be shared, they are reference counted so you do not need to worry about destroying them this will be done automatically.

Parameters

itype	The type in index, either 16- or 32-bit, depending on how many vertices you need to be able to address
numIndexes	The number of indexes in the buffer
usage	One or more members of the HardwareBuffer::Usage enumeration.
useShadowBuffer	If set to `true`, this buffer will be 'shadowed' by one stored in system memory rather than GPU or AGP memory. You should set this flag if you intend to read data back from the index buffer, because reading data from a buffer in the GPU or AGP memory is very expensive, and is in fact impossible if you specify HBU_WRITE_ONLY for the main buffer. If you use this option, all reads and writes will be done to the shadow buffer, and the shadow buffer will be synchronised with the real buffer at an appropriate time.

Implements Ogre::HardwareBufferManagerBase.

References Ogre::HardwareBufferManagerBase::createIndexBuffer().

Referenced by Ogre::Lod0Stripifier::~Lod0Stripifier().

◆ createRenderToVertexBuffer()

RenderToVertexBufferSharedPtr Ogre::HardwareBufferManager::createRenderToVertexBuffer ( )

inlinevirtualinherited

Create a render to vertex buffer.

Remarks: The parameters (such as vertex size etc) are determined later and are allocated when needed.

Implements Ogre::HardwareBufferManagerBase.

References Ogre::HardwareBufferManagerBase::createRenderToVertexBuffer().

◆ createUniformBuffer()

HardwareUniformBufferSharedPtr Ogre::HardwareBufferManager::createUniformBuffer	(	size_t	sizeBytes,
		HardwareBuffer::Usage	usage,
		bool	useShadowBuffer,
		const String &	name = `""`
	)

inlinevirtualinherited

Create uniform buffer.

This type of buffer allows the upload of shader constants once, and sharing between shader stages or even shaders from another materials. The update shall be triggered by GpuProgramParameters, if is dirty

Implements Ogre::HardwareBufferManagerBase.

References Ogre::HardwareBufferManagerBase::createUniformBuffer().

◆ createCounterBuffer()

HardwareCounterBufferSharedPtr Ogre::HardwareBufferManager::createCounterBuffer	(	size_t	sizeBytes,
		HardwareBuffer::Usage	usage,
		bool	useShadowBuffer,
		const String &	name = `""`
	)

inlinevirtualinherited

Create counter buffer.

The update shall be triggered by GpuProgramParameters, if is dirty

Implements Ogre::HardwareBufferManagerBase.

References Ogre::HardwareBufferManagerBase::createCounterBuffer().

◆ createVertexDeclaration()

virtual VertexDeclaration* Ogre::HardwareBufferManager::createVertexDeclaration ( void )

inlinevirtualinherited

Creates a new vertex declaration.

Reimplemented from Ogre::HardwareBufferManagerBase.

References Ogre::HardwareBufferManagerBase::createVertexDeclaration().

◆ destroyVertexDeclaration()

virtual void Ogre::HardwareBufferManager::destroyVertexDeclaration ( VertexDeclaration * decl )

inlinevirtualinherited

Destroys a vertex declaration.

Reimplemented from Ogre::HardwareBufferManagerBase.

References Ogre::HardwareBufferManagerBase::destroyVertexDeclaration().

◆ createVertexBufferBinding()

virtual VertexBufferBinding* Ogre::HardwareBufferManager::createVertexBufferBinding ( void )

inlinevirtualinherited

Creates a new VertexBufferBinding.

Reimplemented from Ogre::HardwareBufferManagerBase.

References Ogre::HardwareBufferManagerBase::createVertexBufferBinding().

◆ destroyVertexBufferBinding()

virtual void Ogre::HardwareBufferManager::destroyVertexBufferBinding ( VertexBufferBinding * binding )

inlinevirtualinherited

Destroys a VertexBufferBinding.

Reimplemented from Ogre::HardwareBufferManagerBase.

References Ogre::HardwareBufferManagerBase::destroyVertexBufferBinding().

◆ registerVertexBufferSourceAndCopy()

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

inlinevirtualinherited

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.

Reimplemented from Ogre::HardwareBufferManagerBase.

References Ogre::HardwareBufferManagerBase::registerVertexBufferSourceAndCopy().

◆ allocateVertexBufferCopy()

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

inlinevirtualinherited

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/

Reimplemented from Ogre::HardwareBufferManagerBase.

References Ogre::HardwareBufferManagerBase::allocateVertexBufferCopy().

◆ releaseVertexBufferCopy()

virtual void Ogre::HardwareBufferManager::releaseVertexBufferCopy ( const HardwareVertexBufferSharedPtr & bufferCopy )

inlinevirtualinherited

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.

Reimplemented from Ogre::HardwareBufferManagerBase.

References Ogre::HardwareBufferManagerBase::releaseVertexBufferCopy().

◆ touchVertexBufferCopy()

virtual void Ogre::HardwareBufferManager::touchVertexBufferCopy ( const HardwareVertexBufferSharedPtr & bufferCopy )

inlinevirtualinherited

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.

Reimplemented from Ogre::HardwareBufferManagerBase.

References Ogre::HardwareBufferManagerBase::touchVertexBufferCopy().

◆ _freeUnusedBufferCopies()

virtual void Ogre::HardwareBufferManager::_freeUnusedBufferCopies ( void )

inlinevirtualinherited

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).

Reimplemented from Ogre::HardwareBufferManagerBase.

References Ogre::HardwareBufferManagerBase::_freeUnusedBufferCopies().

◆ _releaseBufferCopies()

virtual void Ogre::HardwareBufferManager::_releaseBufferCopies ( bool forceFreeUnused = false )

inlinevirtualinherited

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.

Reimplemented from Ogre::HardwareBufferManagerBase.

References Ogre::HardwareBufferManagerBase::_releaseBufferCopies().

◆ _forceReleaseBufferCopies() [1/2]

virtual void Ogre::HardwareBufferManager::_forceReleaseBufferCopies ( const HardwareVertexBufferSharedPtr & sourceBuffer )

inlinevirtualinherited

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.

Reimplemented from Ogre::HardwareBufferManagerBase.

References Ogre::HardwareBufferManagerBase::_forceReleaseBufferCopies().

◆ _forceReleaseBufferCopies() [2/2]

virtual void Ogre::HardwareBufferManager::_forceReleaseBufferCopies ( HardwareVertexBuffer * sourceBuffer )

inlinevirtualinherited

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.

Reimplemented from Ogre::HardwareBufferManagerBase.

References Ogre::HardwareBufferManagerBase::_forceReleaseBufferCopies().

◆ _notifyVertexBufferDestroyed()

void Ogre::HardwareBufferManager::_notifyVertexBufferDestroyed ( HardwareVertexBuffer * buf )

inlineinherited

Notification that a hardware vertex buffer has been destroyed.

References Ogre::HardwareBufferManagerBase::_notifyVertexBufferDestroyed().

◆ _notifyIndexBufferDestroyed()

void Ogre::HardwareBufferManager::_notifyIndexBufferDestroyed ( HardwareIndexBuffer * buf )

inlineinherited

Notification that a hardware index buffer has been destroyed.

References Ogre::HardwareBufferManagerBase::_notifyIndexBufferDestroyed().

◆ _notifyUniformBufferDestroyed()

void Ogre::HardwareBufferManager::_notifyUniformBufferDestroyed ( HardwareUniformBuffer * buf )

inlineinherited

Notification that at hardware uniform buffer has been destroyed.

References Ogre::HardwareBufferManagerBase::_notifyUniformBufferDestroyed().

◆ _notifyConterBufferDestroyed()

void Ogre::HardwareBufferManager::_notifyConterBufferDestroyed ( HardwareCounterBuffer * buf )

inlineinherited

Notification that at hardware counter buffer has been destroyed.

References Ogre::HardwareBufferManagerBase::_notifyCounterBufferDestroyed().

◆ getSingleton()

static HardwareBufferManager& Ogre::HardwareBufferManager::getSingleton ( void )

staticinherited

Get the singleton instance.

Referenced by Ogre::Lod0Stripifier::~Lod0Stripifier().

◆ getSingletonPtr()

static HardwareBufferManager* Ogre::HardwareBufferManager::getSingletonPtr ( void )

staticinherited

Get the singleton instance.

◆ _notifyCounterBufferDestroyed()

void Ogre::HardwareBufferManagerBase::_notifyCounterBufferDestroyed ( HardwareCounterBuffer * buf )

inherited

Notification that at hardware counter buffer has been destroyed.

Referenced by Ogre::HardwareBufferManager::_notifyConterBufferDestroyed().

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

OgreGLHardwareBufferManager.h

Public Types

Public Member Functions

Static Public Member Functions

Detailed Description

Member Enumeration Documentation

◆ BufferLicenseType

Constructor & Destructor Documentation

◆ GLHardwareBufferManager()

◆ ~GLHardwareBufferManager()

Member Function Documentation

◆ getGLUsage()

◆ getGLType()

◆ allocateScratch()

◆ deallocateScratch()

◆ getGLMapBufferThreshold()

◆ setGLMapBufferThreshold()

◆ createVertexBuffer()

◆ createIndexBuffer()

◆ createRenderToVertexBuffer()

◆ createUniformBuffer()

◆ createCounterBuffer()

◆ createVertexDeclaration()

◆ destroyVertexDeclaration()

◆ createVertexBufferBinding()

◆ destroyVertexBufferBinding()

◆ registerVertexBufferSourceAndCopy()

◆ allocateVertexBufferCopy()

◆ releaseVertexBufferCopy()

◆ touchVertexBufferCopy()

◆ _freeUnusedBufferCopies()

◆ _releaseBufferCopies()

◆ _forceReleaseBufferCopies() [1/2]

◆ _forceReleaseBufferCopies() [2/2]

◆ _notifyVertexBufferDestroyed()

◆ _notifyIndexBufferDestroyed()

◆ _notifyUniformBufferDestroyed()

◆ _notifyConterBufferDestroyed()

◆ getSingleton()

◆ getSingletonPtr()

◆ _notifyCounterBufferDestroyed()