OpenVDB: GridHandle< BufferT > Class Template Reference

OpenVDB 10.1.0

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Public Types | Public Member Functions | List of all members
GridHandle< BufferT > Class Template Reference

This class serves to manage a raw memory buffer of a NanoVDB Grid. More...

`#include <nanovdb/util/GridHandle.h>`

Inheritance diagram for GridHandle< BufferT >:

## Public Types
using | BufferType = BufferT

## Public Member Functions
| GridHandle (BufferT &&buffer)
| Move constructor from a buffer.
| GridHandle ()=default
| Empty ctor.
| GridHandle (const GridHandle &)=delete
| Disallow copy-construction.
GridHandle & | operator= (const GridHandle &)=delete
| Disallow copy assignment operation.
GridHandle & | operator= (GridHandle &&other) noexcept
| Move copy assignment operation.
| GridHandle (GridHandle &&other) noexcept
| Move copy-constructor.
| ~GridHandle () override
| Default destructor.
void | reset ()
| clear the buffer
BufferT & | buffer ()
| Return a reference to the buffer.
const BufferT & | buffer () const
| Return a const reference to the buffer.
uint8_t * | data () override
| Returns a non-const pointer to the data.
const uint8_t * | data () const override
| Returns a const pointer to the data.
uint64_t | size () const override
| Returns the size in bytes of the raw memory buffer managed by this GridHandle's allocator.
template<typename ValueT >
const NanoGrid< ValueT > * | grid (uint32_t n=0) const
| Returns a const pointer to the n'th NanoVDB grid encoded in this GridHandle.
template<typename ValueT >
NanoGrid< ValueT > * | grid (uint32_t n=0)
| Returns a pointer to the n'th NanoVDB grid encoded in this GridHandle.
template<typename ValueT , typename U = BufferT>
std::enable_if< BufferTraits< U >::hasDeviceDual, constNanoGrid< ValueT > * >::type | deviceGrid (uint32_t n=0) const
| Return a const pointer to the n'th grid encoded in this GridHandle on the device, e.g. GPU.
template<typename ValueT , typename U = BufferT>
std::enable_if< BufferTraits< U >::hasDeviceDual, NanoGrid< ValueT > * >::type | deviceGrid (uint32_t n=0)
| Return a const pointer to the n'th grid encoded in this GridHandle on the device, e.g. GPU.
template<typename U = BufferT>
std::enable_if< BufferTraits< U >::hasDeviceDual, void >::type | deviceUpload (void *stream=nullptr, bool sync=true)
| Upload the grid to the device, e.g. from CPU to GPU.
template<typename U = BufferT>
std::enable_if< BufferTraits< U >::hasDeviceDual, void >::type | deviceDownload (void *stream=nullptr, bool sync=true)
| Download the grid to from the device, e.g. from GPU to CPU.
bool | empty () const
| Return true if this handle is empty, i.e. has no allocated memory.
| operator bool () const
| Return true if this handle contains a grid.
const GridMetaData * | gridMetaData () const
| Returns a const point to the grid meta data (see definition above).
GridType | gridType () const
| Returns the GridType handled by this instance, and GridType::End if empty.
uint32_t | gridCount () const
| Return the number of grids contained in this buffer.

## Detailed Description

template<typename BufferT = HostBuffer>
class nanovdb::GridHandle< BufferT >

This class serves to manage a raw memory buffer of a NanoVDB Grid.

Note
  It is important to note that this class does NOT depend on OpenVDB.

## Member Typedef Documentation

## ◆ BufferType

template<typename BufferT = HostBuffer>

using BufferType = BufferT

## Constructor & Destructor Documentation

## ◆ GridHandle() [1/4]

template<typename BufferT = HostBuffer>

GridHandle | ( | BufferT && | buffer | ) |
| inline

Move constructor from a buffer.

## ◆ GridHandle() [2/4]

template<typename BufferT = HostBuffer>

GridHandle | ( |  | ) |
| default

Empty ctor.

## ◆ GridHandle() [3/4]

template<typename BufferT = HostBuffer>

GridHandle | ( | const GridHandle< BufferT > & |  | ) |
| delete

Disallow copy-construction.

## ◆ GridHandle() [4/4]

template<typename BufferT = HostBuffer>

GridHandle | ( | GridHandle< BufferT > && | other | ) |
| inlinenoexcept

Move copy-constructor.

## ◆ ~GridHandle()

template<typename BufferT = HostBuffer>

~GridHandle | ( |  | ) |
| inlineoverride

Default destructor.

## Member Function Documentation

## ◆ buffer() [1/2]

template<typename BufferT = HostBuffer>

BufferT & buffer | ( |  | ) |
| inline

Return a reference to the buffer.

## ◆ buffer() [2/2]

template<typename BufferT = HostBuffer>

const BufferT & buffer | ( |  | ) | const
| inline

Return a const reference to the buffer.

## ◆ data() [1/2]

template<typename BufferT = HostBuffer>

const uint8_t * data | ( |  | ) | const
| inlineoverridevirtual

Returns a const pointer to the data.

Warning
  Note that the return pointer can be NULL if the GridHandle was not initialized

Implements GridHandleBase.

## ◆ data() [2/2]

template<typename BufferT = HostBuffer>

uint8_t * data | ( |  | ) |
| inlineoverridevirtual

Returns a non-const pointer to the data.

Warning
  Note that the return pointer can be NULL if the GridHandle was not initialized

Implements GridHandleBase.

## ◆ deviceDownload()

template<typename BufferT = HostBuffer>
template<typename U = BufferT>

std::enable_if< BufferTraits< U >::hasDeviceDual, void >::type deviceDownload | ( | void * | stream = `nullptr`,
|  | bool | sync = `true`
| ) |  |
| inline

Download the grid to from the device, e.g. from GPU to CPU.

Note
  This method is only available if the buffer supports devices

## ◆ deviceGrid() [1/2]

template<typename BufferT = HostBuffer>
template<typename ValueT , typename U = BufferT>

std::enable_if< BufferTraits< U >::hasDeviceDual, NanoGrid< ValueT > * >::type deviceGrid | ( | uint32_t | n = `0` | ) |
| inline

Return a const pointer to the n'th grid encoded in this GridHandle on the device, e.g. GPU.

Warning
  Note that the return pointer can be NULL if the GridHandle was not initialized, n is invalid or if the template parameter does not match the specified grid!

## ◆ deviceGrid() [2/2]

template<typename BufferT = HostBuffer>
template<typename ValueT , typename U = BufferT>

std::enable_if< BufferTraits< U >::hasDeviceDual, constNanoGrid< ValueT > * >::type deviceGrid | ( | uint32_t | n = `0` | ) | const
| inline

Return a const pointer to the n'th grid encoded in this GridHandle on the device, e.g. GPU.

Warning
  Note that the return pointer can be NULL if the GridHandle was not initialized, n is invalid or if the template parameter does not match the specified grid!

## ◆ deviceUpload()

template<typename BufferT = HostBuffer>
template<typename U = BufferT>

std::enable_if< BufferTraits< U >::hasDeviceDual, void >::type deviceUpload | ( | void * | stream = `nullptr`,
|  | bool | sync = `true`
| ) |  |
| inline

Upload the grid to the device, e.g. from CPU to GPU.

Note
  This method is only available if the buffer supports devices

## ◆ empty()

bool empty | ( |  | ) | const
| inlineinherited

Return true if this handle is empty, i.e. has no allocated memory.

## ◆ grid() [1/2]

template<typename BufferT = HostBuffer>
template<typename ValueT >

NanoGrid< ValueT > * grid | ( | uint32_t | n = `0` | ) |
| inline

Returns a pointer to the n'th NanoVDB grid encoded in this GridHandle.

Warning
  Note that the return pointer can be NULL if the GridHandle was not initialized, n is invalid or if the template parameter does not match the specified grid!

## ◆ grid() [2/2]

template<typename BufferT = HostBuffer>
template<typename ValueT >

const NanoGrid< ValueT > * grid | ( | uint32_t | n = `0` | ) | const
| inline

Returns a const pointer to the n'th NanoVDB grid encoded in this GridHandle.

Warning
  Note that the return pointer can be NULL if the GridHandle was not initialized, n is invalid or if the template parameter does not match the specified grid!

## ◆ gridCount()

uint32_t gridCount | ( |  | ) | const
| inlineinherited

Return the number of grids contained in this buffer.

## ◆ gridMetaData()

const GridMetaData * gridMetaData | ( |  | ) | const
| inlineinherited

Returns a const point to the grid meta data (see definition above).

Warning
  Note that the return pointer can be NULL if the GridHandle was not initialized

## ◆ gridType()

GridType gridType | ( |  | ) | const
| inlineinherited

Returns the GridType handled by this instance, and GridType::End if empty.

## ◆ operator bool()

operator bool | ( |  | ) | const
| inlineinherited

Return true if this handle contains a grid.

## ◆ operator=() [1/2]

template<typename BufferT = HostBuffer>

GridHandle & operator= | ( | const GridHandle< BufferT > & |  | ) |
| delete

Disallow copy assignment operation.

## ◆ operator=() [2/2]

template<typename BufferT = HostBuffer>

GridHandle & operator= | ( | GridHandle< BufferT > && | other | ) |
| inlinenoexcept

Move copy assignment operation.

## ◆ reset()

template<typename BufferT = HostBuffer>

void reset | ( |  | ) |
| inline

clear the buffer

## ◆ size()

template<typename BufferT = HostBuffer>

uint64_t size | ( |  | ) | const
| inlineoverridevirtual

Returns the size in bytes of the raw memory buffer managed by this GridHandle's allocator.

Implements GridHandleBase.