OGRE-Next  4.0.0unstable
Object-Oriented Graphics Rendering Engine
Ogre::D3D11CompatBufferInterface Class Referencefinal

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)
BufferPackedgetBufferPacked ()
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 ( )

Member Function Documentation

◆ advanceFrame()

void Ogre::D3D11CompatBufferInterface::advanceFrame ( )

Implements Ogre::BufferInterface.

◆ map()

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

Implements Ogre::BufferInterface.

◆ regressFrame()

void Ogre::D3D11CompatBufferInterface::regressFrame ( )

Implements Ogre::BufferInterface.

◆ unmap()

void Ogre::D3D11CompatBufferInterface::unmap ( UnmapOptions  unmapOption,
size_t  flushStartElem = 0,
size_t  flushSizeElem = 0 

Implements Ogre::BufferInterface.

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