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Compression.h File Reference
`#include <openvdb/Types.h>`
`#include <openvdb/MetaMap.h>`
`#include <openvdb/math/Math.h>`
`#include "io.h"`
`#include "DelayedLoadMetadata.h"`
`#include <algorithm>`
`#include <iostream>`
`#include <memory>`
`#include <string>`
`#include <vector>`

Go to the source code of this file.

## Classes

struct | MaskCompress< ValueT, MaskT >
struct | RealToHalf< T >
| RealToHalf and its specializations define a mapping from floating-point data types to analogous half float types. More...
struct | RealToHalf< float >
struct | RealToHalf< double >
struct | RealToHalf< Vec2s >
struct | RealToHalf< Vec2d >
struct | RealToHalf< Vec3s >
struct | RealToHalf< Vec3d >
struct | HalfReader< false, T >
| Partial specialization for non-floating-point types (no half to float promotion) More...
struct | HalfReader< true, T >
| Partial specialization for floating-point types. More...
struct | HalfWriter< false, T >
| Partial specialization for non-floating-point types (no float to half quantization) More...
struct | HalfWriter< true, T >
| Partial specialization for floating-point types. More...

## Namespaces

namespace | openvdb
namespace | openvdb::v11_0
namespace | openvdb::v11_0::io

## Enumerations

enum | { COMPRESS_NONE = 0 , COMPRESS_ZIP = 0x1 , COMPRESS_ACTIVE_MASK = 0x2 , COMPRESS_BLOSC = 0x4 }
| OR-able bit flags for compression options on input and output streams. More...
enum | { NO_MASK_OR_INACTIVE_VALS , NO_MASK_AND_MINUS_BG , NO_MASK_AND_ONE_INACTIVE_VAL , MASK_AND_NO_INACTIVE_VALS , MASK_AND_ONE_INACTIVE_VAL , MASK_AND_TWO_INACTIVE_VALS , NO_MASK_AND_ALL_VALS }

## Functions

OPENVDB_API std::string | compressionToString (uint32_t flags)
| Return a string describing the given compression flags.
template<typename T>
T | truncateRealToHalf (const T &val)
| Return the given value truncated to 16-bit float precision.
OPENVDB_API size_t | zipToStreamSize (const char *data, size_t numBytes)
OPENVDB_API void | zipToStream (std::ostream &, const char *data, size_t numBytes)
OPENVDB_API void | unzipFromStream (std::istream &, char *data, size_t numBytes)
OPENVDB_API size_t | bloscToStreamSize (const char *data, size_t valSize, size_t numVals)
OPENVDB_API void | bloscToStream (std::ostream &, const char *data, size_t valSize, size_t numVals)
OPENVDB_API void | bloscFromStream (std::istream &, char *data, size_t numBytes)
template<typename T>
void | readData (std::istream &is, T *data, Index count, uint32_t compression, DelayedLoadMetadata *metadata=nullptr, size_t metadataOffset=size_t(0))
| Read data from a stream.
template<>
void | readData< std::string > (std::istream &is, std::string *data, Index count, uint32_t, DelayedLoadMetadata *, size_t)
| Specialization for std::string input.
template<typename T>
size_t | writeDataSize (const T *data, Index count, uint32_t compression)
template<>
size_t | writeDataSize< std::string > (const std::string *data, Index count, uint32_t)
| Specialization for std::string output.
template<typename T>
void | writeData (std::ostream &os, const T *data, Index count, uint32_t compression)
template<>
void | writeData< std::string > (std::ostream &os, const std::string *data, Index count, uint32_t)
| Specialization for std::string output.
template<typename ValueT, typename MaskT>
void | readCompressedValues (std::istream &is, ValueT *destBuf, Index destCount, const MaskT &valueMask, bool fromHalf)
template<typename ValueT, typename MaskT>
size_t | writeCompressedValuesSize (ValueT *srcBuf, Index srcCount, const MaskT &valueMask, uint8_t maskMetadata, bool toHalf, uint32_t compress)
template<typename ValueT, typename MaskT>
void | writeCompressedValues (std::ostream &os, ValueT *srcBuf, Index srcCount, const MaskT &valueMask, const MaskT &childMask, bool toHalf)