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| | ArrayHandleOffsetsToNumComponents () |
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| VTKM_CONT | ArrayHandleOffsetsToNumComponents (const Thisclass &src) |
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| VTKM_CONT | ArrayHandleOffsetsToNumComponents (Thisclass &&src) noexcept |
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| VTKM_CONT | ArrayHandleOffsetsToNumComponents (const vtkm::cont::ArrayHandle< typename Superclass::ValueType, typename Superclass::StorageTag > &src) |
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| VTKM_CONT | ArrayHandleOffsetsToNumComponents (vtkm::cont::ArrayHandle< typename Superclass::ValueType, typename Superclass::StorageTag > &&src) noexcept |
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| VTKM_CONT | ArrayHandleOffsetsToNumComponents (const std::vector< vtkm::cont::internal::Buffer > &buffers) |
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| VTKM_CONT | ArrayHandleOffsetsToNumComponents (std::vector< vtkm::cont::internal::Buffer > &&buffers) noexcept |
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| VTKM_CONT Thisclass & | operator= (const Thisclass &src) |
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| VTKM_CONT Thisclass & | operator= (Thisclass &&src) noexcept |
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| | ArrayHandleOffsetsToNumComponents (const OffsetsArray &array) |
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 Public Member Functions inherited from vtkm::cont::ArrayHandle< vtkm::IdComponent, vtkm::cont::StorageTagOffsetsToNumComponents< OffsetsArray::StorageTag > > |
| | ArrayHandle () |
| | Constructs an empty ArrayHandle. More...
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| | ArrayHandle (const vtkm::cont::ArrayHandle< ValueType, StorageTag > &src) |
| | Copy constructor. More...
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| | ArrayHandle (vtkm::cont::ArrayHandle< ValueType, StorageTag > &&src) noexcept |
| | Move constructor. More...
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| | ArrayHandle (const std::vector< vtkm::cont::internal::Buffer > &buffers) |
| | Special constructor for subclass specializations that need to set the initial state array. More...
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| | ArrayHandle (std::vector< vtkm::cont::internal::Buffer > &&buffers) noexcept |
| | Special constructor for subclass specializations that need to set the initial state array. More...
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| | ~ArrayHandle () |
| | Destructs an empty ArrayHandle. More...
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| vtkm::cont::ArrayHandle< ValueType, StorageTag > & | operator= (const vtkm::cont::ArrayHandle< ValueType, StorageTag > &src) |
| | Shallow copies an ArrayHandle. More...
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| vtkm::cont::ArrayHandle< ValueType, StorageTag > & | operator= (vtkm::cont::ArrayHandle< ValueType, StorageTag > &&src) noexcept |
| | Move and Assignment of an ArrayHandle. More...
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| bool | operator== (const ArrayHandle< ValueType, StorageTag > &rhs) const |
| | Like a pointer, two ArrayHandles are considered equal if they point to the same location in memory. More...
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| bool | operator== (const ArrayHandle< VT, ST > &) const |
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| bool | operator!= (const ArrayHandle< ValueType, StorageTag > &rhs) const |
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| bool | operator!= (const ArrayHandle< VT, ST > &) const |
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| StorageType | GetStorage () const |
| | Get the storage. More...
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| ReadPortalType | ReadPortal () const |
| | Get an array portal that can be used in the control environment. More...
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| ReadPortalType | ReadPortal (vtkm::cont::Token &token) const |
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| WritePortalType | WritePortal () const |
| | Get an array portal that can be used in the control environment. More...
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| WritePortalType | WritePortal (vtkm::cont::Token &token) const |
| | Get an array portal that can be used in the control environment. More...
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| vtkm::Id | GetNumberOfValues () const |
| | Returns the number of entries in the array. More...
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| vtkm::IdComponent | GetNumberOfComponentsFlat () const |
| | Returns the total number of components for each value in the array. More...
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| void | Allocate (vtkm::Id numberOfValues, vtkm::CopyFlag preserve, vtkm::cont::Token &token) const |
| | Allocates an array large enough to hold the given number of values. More...
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| void | Allocate (vtkm::Id numberOfValues, vtkm::CopyFlag preserve=vtkm::CopyFlag::Off) const |
| | Allocates an array large enough to hold the given number of values. More...
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| void | AllocateAndFill (vtkm::Id numberOfValues, const ValueType &fillValue, vtkm::CopyFlag preserve, vtkm::cont::Token &token) const |
| | Allocates an array and fills it with an initial value. More...
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| void | AllocateAndFill (vtkm::Id numberOfValues, const ValueType &fillValue, vtkm::CopyFlag preserve=vtkm::CopyFlag::Off) const |
| | Allocates an array and fills it with an initial value. More...
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| void | Fill (const ValueType &fillValue, vtkm::Id startIndex, vtkm::Id endIndex, vtkm::cont::Token &token) const |
| | Fills the array with a given value. More...
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| void | Fill (const ValueType &fillValue, vtkm::Id startIndex, vtkm::Id endIndex) const |
| | Fills the array with a given value. More...
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| void | Fill (const ValueType &fillValue, vtkm::Id startIndex=0) const |
| | Fills the array with a given value. More...
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| void | ReleaseResourcesExecution () const |
| | Releases any resources being used in the execution environment (that are not being shared by the control environment). More...
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| void | ReleaseResources () const |
| | Releases all resources in both the control and execution environments. More...
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| ReadPortalType | PrepareForInput (vtkm::cont::DeviceAdapterId device, vtkm::cont::Token &token) const |
| | Prepares this array to be used as an input to an operation in the execution environment. More...
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| WritePortalType | PrepareForInPlace (vtkm::cont::DeviceAdapterId device, vtkm::cont::Token &token) const |
| | Prepares this array to be used in an in-place operation (both as input and output) in the execution environment. More...
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| WritePortalType | PrepareForOutput (vtkm::Id numberOfValues, vtkm::cont::DeviceAdapterId device, vtkm::cont::Token &token) const |
| | Prepares (allocates) this array to be used as an output from an operation in the execution environment. More...
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| bool | IsOnDevice (vtkm::cont::DeviceAdapterId device) const |
| | Returns true if the ArrayHandle's data is on the given device. More...
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| bool | IsOnHost () const |
| | Returns true if the ArrayHandle's data is on the host. More...
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| void | SyncControlArray () const |
| | Synchronizes the control array with the execution array. More...
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| void | Enqueue (const vtkm::cont::Token &token) const |
| | Enqueue a token for access to this ArrayHandle. More...
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| void | DeepCopyFrom (const vtkm::cont::ArrayHandle< ValueType, StorageTag > &source) const |
| | Deep copies the data in the array. More...
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| const std::vector< vtkm::cont::internal::Buffer > & | GetBuffers () const |
| | Returns the internal Buffer structures that hold the data. More...
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| std::vector< vtkm::cont::internal::Buffer > & | GetBuffers () |
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template<class OffsetsArray>
class vtkm::cont::ArrayHandleOffsetsToNumComponents< OffsetsArray >
An ArrayHandle that converts an array of offsets to an array of Vec sizes.
It is common in VTK-m to pack small vectors of variable sizes into a single contiguous array. For example, cells in an explicit cell set can each have a different amount of vertices (triangles = 3, quads = 4, tetra = 4, hexa = 8, etc.). Generally, to access items in this list, you need an array of components in each entry and the offset for each entry. However, if you have just the array of offsets in sorted order, you can easily derive the number of components for each entry by subtracting adjacent entries. This works best if the offsets array has a size that is one more than the number of packed vectors with the first entry set to 0 and the last entry set to the total size of the packed array (the offset to the end).
ArrayHandleOffsetsToNumComponents decorates an array in exactly this manner. It takes an offsets array and makes it behave like an array of counts. Note that the offsets array must conform to the conditions described above: the offsets are in sorted order and there is one additional entry in the offsets (ending in an offset pointing past the end of the array).
When packing data of this nature, it is common to start with an array that is the number of components. You can convert that to an offsets array using the vtkm::cont::ConvertNumComponentsToOffsets function. This will create an offsets array with one extra entry as previously described. You can then throw out the original number of components array and use the offsets with ArrayHandleOffsetsToNumComponents to represent both the offsets and num components while storing only one array.
