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Object-Oriented Graphics Rendering Engine
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Ogre::GLES2HardwareUniformBuffer Class Reference

Specialisation of HardwareUniformBuffer for OpenGL. More...

#include <OgreGLES2HardwareUniformBuffer.h>

+ Inheritance diagram for Ogre::GLES2HardwareUniformBuffer:
+ Collaboration diagram for Ogre::GLES2HardwareUniformBuffer:

Public Types

enum  LockOptions {
  HBL_NORMAL, HBL_DISCARD, HBL_READ_ONLY, HBL_NO_OVERWRITE,
  HBL_WRITE_ONLY
}
 Locking options. More...
 
enum  Usage {
  HBU_STATIC = 1, HBU_DYNAMIC = 2, HBU_WRITE_ONLY = 4, HBU_DISCARDABLE = 8,
  HBU_STATIC_WRITE_ONLY = 5, HBU_DYNAMIC_WRITE_ONLY = 6, HBU_DYNAMIC_WRITE_ONLY_DISCARDABLE = 14
}
 Enums describing buffer usage; not mutually exclusive. More...
 

Public Member Functions

 GLES2HardwareUniformBuffer (HardwareBufferManagerBase *mgr, size_t bufferSize, HardwareBuffer::Usage usage, bool useShadowBuffer, const String &name)
 
 ~GLES2HardwareUniformBuffer ()
 
virtual void _updateFromShadow (void)
 Updates the real buffer from the shadow buffer, if required. More...
 
void copyData (HardwareBuffer &srcBuffer, size_t srcOffset, size_t dstOffset, size_t length, bool discardWholeBuffer=false)
 See HardwareBuffer. More...
 
virtual void copyData (HardwareBuffer &srcBuffer)
 Copy all data from another buffer into this one. More...
 
GLint getGLBufferBinding (void) const
 
GLuint getGLBufferId (void) const
 
HardwareBufferManagerBasegetManager () const
 Return the manager of this buffer, if any. More...
 
const StringgetName () const
 
size_t getSizeInBytes (void) const
 Returns the size of this buffer in bytes. More...
 
Usage getUsage (void) const
 Returns the Usage flags with which this buffer was created. More...
 
bool hasShadowBuffer (void) const
 Returns whether this buffer has a system memory shadow for quicker reading. More...
 
bool isLocked (void) const
 Returns whether or not this buffer is currently locked. More...
 
bool isSystemMemory (void) const
 Returns whether this buffer is held in system memory. More...
 
virtual void * lock (size_t offset, size_t length, LockOptions options)
 Lock the buffer for (potentially) reading / writing. More...
 
void * lock (LockOptions options)
 Lock the entire buffer for (potentially) reading / writing. More...
 
void operator delete (void *ptr)
 
void operator delete (void *ptr, void *)
 
void operator delete (void *ptr, const char *, int, const char *)
 
void operator delete[] (void *ptr)
 
void operator delete[] (void *ptr, const char *, int, const char *)
 
void * operator new (size_t sz, const char *file, int line, const char *func)
 operator new, with debug line info More...
 
void * operator new (size_t sz)
 
void * operator new (size_t sz, void *ptr)
 placement operator new More...
 
void * operator new[] (size_t sz, const char *file, int line, const char *func)
 array operator new, with debug line info More...
 
void * operator new[] (size_t sz)
 
void readData (size_t offset, size_t length, void *pDest)
 See HardwareBuffer. More...
 
void setGLBufferBinding (GLint binding)
 
void suppressHardwareUpdate (bool suppress)
 Pass true to suppress hardware upload of shadow buffer changes. More...
 
virtual void unlock (void)
 Releases the lock on this buffer. More...
 
void writeData (size_t offset, size_t length, const void *pSource, bool discardWholeBuffer=false)
 See HardwareBuffer. More...
 

Protected Member Functions

void * lockImpl (size_t offset, size_t length, LockOptions options)
 See HardwareBuffer. More...
 
void unlockImpl (void)
 See HardwareBuffer. More...
 

Protected Attributes

bool mIsLocked
 
size_t mLockSize
 
size_t mLockStart
 
HardwareBufferManagerBasemMgr
 
String mName
 
HardwareBuffermShadowBuffer
 
bool mShadowUpdated
 
size_t mSizeInBytes
 
bool mSuppressHardwareUpdate
 
bool mSystemMemory
 
Usage mUsage
 
bool mUseShadowBuffer
 

Private Attributes

GLint mBinding
 
GLuint mBufferId
 

Detailed Description

Specialisation of HardwareUniformBuffer for OpenGL.

Definition at line 39 of file OgreGLES2HardwareUniformBuffer.h.

Member Enumeration Documentation

Locking options.

Enumerator
HBL_NORMAL 

Normal mode, ie allows read/write and contents are preserved.

HBL_DISCARD 

Discards the entire buffer while locking; this allows optimisation to be performed because synchronisation issues are relaxed.

Only allowed on buffers created with the HBU_DYNAMIC flag.

HBL_READ_ONLY 

Lock the buffer for reading only.

Not allowed in buffers which are created with HBU_WRITE_ONLY. Mandatory on static buffers, i.e. those created without the HBU_DYNAMIC flag.

HBL_NO_OVERWRITE 

As HBL_DISCARD, except the application guarantees not to overwrite any region of the buffer which has already been used in this frame, can allow some optimisation on some APIs.

HBL_WRITE_ONLY 

Lock the buffer for writing only.

Definition at line 121 of file OgreHardwareBuffer.h.

Enums describing buffer usage; not mutually exclusive.

Enumerator
HBU_STATIC 

Static buffer which the application rarely modifies once created.

Modifying the contents of this buffer will involve a performance hit.

HBU_DYNAMIC 

Indicates the application would like to modify this buffer with the CPU fairly often.

Buffers created with this flag will typically end up in AGP memory rather than video memory.

HBU_WRITE_ONLY 

Indicates the application will never read the contents of the buffer back, it will only ever write data.

Locking a buffer with this flag will ALWAYS return a pointer to new, blank memory rather than the memory associated with the contents of the buffer; this avoids DMA stalls because you can write to a new memory area while the previous one is being used.

HBU_DISCARDABLE 

Indicates that the application will be refilling the contents of the buffer regularly (not just updating, but generating the contents from scratch), and therefore does not mind if the contents of the buffer are lost somehow and need to be recreated.

This allows and additional level of optimisation on the buffer. This option only really makes sense when combined with HBU_DYNAMIC_WRITE_ONLY.

HBU_STATIC_WRITE_ONLY 

Combination of HBU_STATIC and HBU_WRITE_ONLY.

HBU_DYNAMIC_WRITE_ONLY 

Combination of HBU_DYNAMIC and HBU_WRITE_ONLY.

If you use this, strongly consider using HBU_DYNAMIC_WRITE_ONLY_DISCARDABLE instead if you update the entire contents of the buffer very regularly.

HBU_DYNAMIC_WRITE_ONLY_DISCARDABLE 

Combination of HBU_DYNAMIC, HBU_WRITE_ONLY and HBU_DISCARDABLE.

Definition at line 79 of file OgreHardwareBuffer.h.

Constructor & Destructor Documentation

Ogre::GLES2HardwareUniformBuffer::GLES2HardwareUniformBuffer ( HardwareBufferManagerBase mgr,
size_t  bufferSize,
HardwareBuffer::Usage  usage,
bool  useShadowBuffer,
const String name 
)
Ogre::GLES2HardwareUniformBuffer::~GLES2HardwareUniformBuffer ( )

Member Function Documentation

virtual void Ogre::HardwareBuffer::_updateFromShadow ( void  )
inlinevirtualinherited

Updates the real buffer from the shadow buffer, if required.

Reimplemented in Ogre::GL3PlusHardwareVertexBuffer, Ogre::GL3PlusHardwareIndexBuffer, Ogre::GLHardwareVertexBuffer, and Ogre::GLHardwareIndexBuffer.

Definition at line 305 of file OgreHardwareBuffer.h.

void Ogre::GLES2HardwareUniformBuffer::copyData ( HardwareBuffer srcBuffer,
size_t  srcOffset,
size_t  dstOffset,
size_t  length,
bool  discardWholeBuffer = false 
)
virtual

See HardwareBuffer.

Reimplemented from Ogre::HardwareBuffer.

virtual void Ogre::HardwareBuffer::copyData ( HardwareBuffer srcBuffer)
inlinevirtualinherited

Copy all data from another buffer into this one.

Remarks
Normally these buffers should be of identical size, but if they're not, the routine will use the smallest of the two sizes.

Definition at line 298 of file OgreHardwareBuffer.h.

References Ogre::HardwareBuffer::getSizeInBytes().

GLint Ogre::GLES2HardwareUniformBuffer::getGLBufferBinding ( void  ) const
inline

Definition at line 69 of file OgreGLES2HardwareUniformBuffer.h.

GLuint Ogre::GLES2HardwareUniformBuffer::getGLBufferId ( void  ) const
inline

Definition at line 67 of file OgreGLES2HardwareUniformBuffer.h.

size_t Ogre::HardwareBuffer::getSizeInBytes ( void  ) const
inlineinherited

Returns the size of this buffer in bytes.

Definition at line 330 of file OgreHardwareBuffer.h.

Referenced by Ogre::HardwareBuffer::copyData().

Usage Ogre::HardwareBuffer::getUsage ( void  ) const
inlineinherited

Returns the Usage flags with which this buffer was created.

Definition at line 332 of file OgreHardwareBuffer.h.

bool Ogre::HardwareBuffer::hasShadowBuffer ( void  ) const
inlineinherited

Returns whether this buffer has a system memory shadow for quicker reading.

Definition at line 336 of file OgreHardwareBuffer.h.

bool Ogre::HardwareBuffer::isLocked ( void  ) const
inlineinherited

Returns whether or not this buffer is currently locked.

Definition at line 338 of file OgreHardwareBuffer.h.

bool Ogre::HardwareBuffer::isSystemMemory ( void  ) const
inlineinherited

Returns whether this buffer is held in system memory.

Definition at line 334 of file OgreHardwareBuffer.h.

void* Ogre::HardwareBuffer::lock ( LockOptions  options)
inlineinherited

Lock the entire buffer for (potentially) reading / writing.

Parameters
optionsLocking options
Returns
Pointer to the locked memory

Definition at line 220 of file OgreHardwareBuffer.h.

void* Ogre::GLES2HardwareUniformBuffer::lockImpl ( size_t  offset,
size_t  length,
LockOptions  options 
)
protectedvirtual
template<class Alloc >
void Ogre::AllocatedObject< Alloc >::operator delete ( void *  ptr)
inlineinherited

Definition at line 96 of file OgreMemoryAllocatedObject.h.

template<class Alloc >
void Ogre::AllocatedObject< Alloc >::operator delete ( void *  ptr,
void *   
)
inlineinherited

Definition at line 102 of file OgreMemoryAllocatedObject.h.

template<class Alloc >
void Ogre::AllocatedObject< Alloc >::operator delete ( void *  ptr,
const char *  ,
int  ,
const char *   
)
inlineinherited

Definition at line 108 of file OgreMemoryAllocatedObject.h.

template<class Alloc >
void Ogre::AllocatedObject< Alloc >::operator delete[] ( void *  ptr)
inlineinherited

Definition at line 113 of file OgreMemoryAllocatedObject.h.

template<class Alloc >
void Ogre::AllocatedObject< Alloc >::operator delete[] ( void *  ptr,
const char *  ,
int  ,
const char *   
)
inlineinherited

Definition at line 119 of file OgreMemoryAllocatedObject.h.

template<class Alloc >
void* Ogre::AllocatedObject< Alloc >::operator new ( size_t  sz,
const char *  file,
int  line,
const char *  func 
)
inlineinherited

operator new, with debug line info

Definition at line 68 of file OgreMemoryAllocatedObject.h.

template<class Alloc >
void* Ogre::AllocatedObject< Alloc >::operator new ( size_t  sz)
inlineinherited

Definition at line 73 of file OgreMemoryAllocatedObject.h.

template<class Alloc >
void* Ogre::AllocatedObject< Alloc >::operator new ( size_t  sz,
void *  ptr 
)
inlineinherited

placement operator new

Definition at line 79 of file OgreMemoryAllocatedObject.h.

template<class Alloc >
void* Ogre::AllocatedObject< Alloc >::operator new[] ( size_t  sz,
const char *  file,
int  line,
const char *  func 
)
inlineinherited

array operator new, with debug line info

Definition at line 86 of file OgreMemoryAllocatedObject.h.

template<class Alloc >
void* Ogre::AllocatedObject< Alloc >::operator new[] ( size_t  sz)
inlineinherited

Definition at line 91 of file OgreMemoryAllocatedObject.h.

void Ogre::GLES2HardwareUniformBuffer::readData ( size_t  offset,
size_t  length,
void *  pDest 
)
virtual
void Ogre::GLES2HardwareUniformBuffer::setGLBufferBinding ( GLint  binding)
void Ogre::HardwareBuffer::suppressHardwareUpdate ( bool  suppress)
inlineinherited

Pass true to suppress hardware upload of shadow buffer changes.

Definition at line 342 of file OgreHardwareBuffer.h.

virtual void Ogre::HardwareBuffer::unlock ( void  )
inlinevirtualinherited

Releases the lock on this buffer.

Remarks
Locking and unlocking a buffer can, in some rare circumstances such as switching video modes whilst the buffer is locked, corrupt the contents of a buffer. This is pretty rare, but if it occurs, this method will throw an exception, meaning you must re-upload the data.
Note that using the 'read' and 'write' forms of updating the buffer does not suffer from this problem, so if you want to be 100% sure your data will not be lost, use the 'read' and 'write' forms instead.

Reimplemented in Ogre::DefaultHardwareCounterBuffer, Ogre::GL3PlusDefaultHardwareCounterBuffer, Ogre::DefaultHardwareUniformBuffer, Ogre::GL3PlusDefaultHardwareUniformBuffer, Ogre::GLES2DefaultHardwareUniformBuffer, Ogre::DefaultHardwareIndexBuffer, Ogre::GLDefaultHardwareIndexBuffer, Ogre::GL3PlusDefaultHardwareIndexBuffer, Ogre::GLESDefaultHardwareIndexBuffer, Ogre::GLES2DefaultHardwareIndexBuffer, Ogre::DefaultHardwareVertexBuffer, Ogre::GL3PlusDefaultHardwareVertexBuffer, Ogre::GLDefaultHardwareVertexBuffer, Ogre::GLESDefaultHardwareVertexBuffer, Ogre::GLES2DefaultHardwareVertexBuffer, Ogre::D3D11HardwareIndexBuffer, Ogre::D3D11HardwareUniformBuffer, and Ogre::D3D11HardwareVertexBuffer.

Definition at line 236 of file OgreHardwareBuffer.h.

Referenced by Ogre::HardwareBuffer::copyData().

void Ogre::GLES2HardwareUniformBuffer::unlockImpl ( void  )
protectedvirtual
void Ogre::GLES2HardwareUniformBuffer::writeData ( size_t  offset,
size_t  length,
const void *  pSource,
bool  discardWholeBuffer = false 
)
virtual

Member Data Documentation

GLint Ogre::GLES2HardwareUniformBuffer::mBinding
private

Definition at line 43 of file OgreGLES2HardwareUniformBuffer.h.

GLuint Ogre::GLES2HardwareUniformBuffer::mBufferId
private

Definition at line 42 of file OgreGLES2HardwareUniformBuffer.h.

bool Ogre::HardwareBuffer::mIsLocked
protectedinherited

Definition at line 145 of file OgreHardwareBuffer.h.

size_t Ogre::HardwareBuffer::mLockSize
protectedinherited

Definition at line 147 of file OgreHardwareBuffer.h.

size_t Ogre::HardwareBuffer::mLockStart
protectedinherited

Definition at line 146 of file OgreHardwareBuffer.h.

HardwareBuffer* Ogre::HardwareBuffer::mShadowBuffer
protectedinherited

Definition at line 150 of file OgreHardwareBuffer.h.

bool Ogre::HardwareBuffer::mShadowUpdated
protectedinherited

Definition at line 151 of file OgreHardwareBuffer.h.

size_t Ogre::HardwareBuffer::mSizeInBytes
protectedinherited

Definition at line 143 of file OgreHardwareBuffer.h.

bool Ogre::HardwareBuffer::mSuppressHardwareUpdate
protectedinherited

Definition at line 152 of file OgreHardwareBuffer.h.

bool Ogre::HardwareBuffer::mSystemMemory
protectedinherited

Definition at line 148 of file OgreHardwareBuffer.h.

Usage Ogre::HardwareBuffer::mUsage
protectedinherited

Definition at line 144 of file OgreHardwareBuffer.h.

bool Ogre::HardwareBuffer::mUseShadowBuffer
protectedinherited

Definition at line 149 of file OgreHardwareBuffer.h.


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