In D3D11, const buffers can't be bound by offset. More...

#include <OgreD3D11CompatBufferInterface.h>

Inheritance diagram for Ogre::D3D11CompatBufferInterface:

Public Member Functions
	D3D11CompatBufferInterface (size_t vboPoolIdx, ID3D11Buffer *d3dBuffer, D3D11Device &device)

	~D3D11CompatBufferInterface () override

void	advanceFrame () override

void *RESTRICT_ALIAS_RETURN	map (size_t elementStart, size_t elementCount, MappingState prevMappingState, bool advanceFrame=true) override

void	regressFrame () override

void	unmap (UnmapOptions unmapOption, size_t flushStartElem=0, size_t flushSizeElem=0) override

Public Member Functions inherited from Ogre::D3D11BufferInterfaceBase
	D3D11BufferInterfaceBase (size_t vboPoolIdx, ID3D11Buffer *d3dBuffer)

	~D3D11BufferInterfaceBase () override

void	_ensureDelayedImmutableBuffersAreReady () override

void	copyTo (BufferInterface *dstBuffer, size_t dstOffsetBytes, size_t srcOffsetBytes, size_t sizeBytes) override

ID3D11Buffer *	getVboName () const

size_t	getVboPoolIndex ()

Public Member Functions inherited from Ogre::BufferInterface
	BufferInterface ()

virtual	~BufferInterface ()

virtual void	_notifyBuffer (BufferPacked *buffer)

BufferPacked *	getBufferPacked ()

void	upload (const void *data, size_t elementStart, size_t elementCount)

Detailed Description

In D3D11, const buffers can't be bound by offset.

Their size at creation defines the size to be bound to the shader, and the max limit is 64kb. This is unless we're using D3D11.1 on Windows 8.1; which for simplicity we treat it the same as D3D11.

: This limitation prevents us from allocating 3x size for triple buffering.

: Therefore we need the traditional scheme of mapping with NO_OVERWRITE and then use DISCARD when we've filled the buffer.

: In D3D11.0, only index and vertex buffers can be mapped with NO_OVERWRITE. That leaves only DISCARD to be used on those systems. NO_OVERWRITE is used if used D3D 11.1 though.

: This buffer interface is for compatibility with these systems.

Constructor & Destructor Documentation

◆ D3D11CompatBufferInterface()

Ogre::D3D11CompatBufferInterface::D3D11CompatBufferInterface	(	size_t	vboPoolIdx,
		ID3D11Buffer *	d3dBuffer,
		D3D11Device &	device
	)

◆ ~D3D11CompatBufferInterface()

Ogre::D3D11CompatBufferInterface::~D3D11CompatBufferInterface ( )

override

Member Function Documentation

◆ advanceFrame()

void Ogre::D3D11CompatBufferInterface::advanceFrame ( )

overridevirtual

Implements Ogre::BufferInterface.

◆ map()

void* RESTRICT_ALIAS_RETURN Ogre::D3D11CompatBufferInterface::map	(	size_t	elementStart,
		size_t	elementCount,
		MappingState	prevMappingState,
		bool	advanceFrame = `true`
	)