OpenVDB 11.0.0

Loading...
Searching...
No Matches
LeafBuffer.h
Go to the documentation of this file.
1// Copyright Contributors to the OpenVDB Project
2// SPDX-License-Identifier: MPL-2.0
3
4#ifndef OPENVDB_TREE_LEAFBUFFER_HAS_BEEN_INCLUDED
5#define OPENVDB_TREE_LEAFBUFFER_HAS_BEEN_INCLUDED
6
7#include <openvdb/Types.h>
8#include <openvdb/io/Compression.h> // for io::readCompressedValues(), etc
9#include <openvdb/util/NodeMasks.h>
10#include <tbb/spin_mutex.h>
11#include <algorithm> // for std::swap
12#include <atomic>
13#include <cstddef> // for offsetof()
14#include <iostream>
15#include <memory>
16#include <type_traits>
17
18
19 class TestLeaf;
20
21 namespace openvdb {
22 OPENVDB_USE_VERSION_NAMESPACE
23 namespace OPENVDB_VERSION_NAME {
24 namespace tree {
25
26
27/// @brief Array of fixed size 2<SUP>3<I>Log2Dim</I></SUP> that stores
28/// the voxel values of a LeafNode
29 template<typename T, Index Log2Dim>
30 class LeafBuffer
31{
32 public:
33 using ValueType = T;
34 using StorageType = ValueType;
35 using NodeMaskType = util::NodeMask<Log2Dim>;
36 static const Index SIZE = 1 << 3 * Log2Dim;
37
38#ifdef OPENVDB_USE_DELAYED_LOADING
39 struct FileInfo
40 {
41 FileInfo(): bufpos(0) , maskpos(0) {}
42 std::streamoff bufpos;
43 std::streamoff maskpos;
44 io::MappedFile::Ptr mapping;
45 SharedPtr<io::StreamMetadata> meta;
46 };
47#endif
48
49 /// Default constructor
50 inline LeafBuffer(): mData(new ValueType[SIZE])
51 {
52#ifdef OPENVDB_USE_DELAYED_LOADING
53 mOutOfCore = 0;
54#endif
55 }
56 /// Construct a buffer populated with the specified value.
57 explicit inline LeafBuffer(const ValueType&);
58 /// Copy constructor
59 inline LeafBuffer(const LeafBuffer&);
60 /// Construct a buffer but don't allocate memory for the full array of values.
61 LeafBuffer(PartialCreate, const ValueType&): mData(nullptr)
62 {
63#ifdef OPENVDB_USE_DELAYED_LOADING
64 mOutOfCore = 0;
65#endif
66 }
67 /// Destructor
68 inline ~LeafBuffer();
69
70 /// Return @c true if this buffer's values have not yet been read from disk.
71 bool isOutOfCore() const
72 {
73#ifdef OPENVDB_USE_DELAYED_LOADING
74 return bool(mOutOfCore);
75#else
76 return false;
77#endif
78 }
79 /// Return @c true if memory for this buffer has not yet been allocated.
80 bool empty() const { return !mData || this->isOutOfCore(); }
81 /// Allocate memory for this buffer if it has not already been allocated.
82 bool allocate() { if (mData == nullptr) mData = new ValueType[SIZE]; return true; }
83
84 /// Populate this buffer with a constant value.
85 inline void fill(const ValueType&);
86
87 /// Return a const reference to the i'th element of this buffer.
88 const ValueType& getValue(Index i) const { return this->at(i); }
89 /// Return a const reference to the i'th element of this buffer.
90 const ValueType& operator[](Index i) const { return this->at(i); }
91 /// Set the i'th value of this buffer to the specified value.
92 inline void setValue(Index i, const ValueType&);
93
94 /// Copy the other buffer's values into this buffer.
95 inline LeafBuffer& operator=(const LeafBuffer&);
96
97 /// @brief Return @c true if the contents of the other buffer
98 /// exactly equal the contents of this buffer.
99 inline bool operator==(const LeafBuffer&) const;
100 /// @brief Return @c true if the contents of the other buffer
101 /// are not exactly equal to the contents of this buffer.
102 inline bool operator!=(const LeafBuffer& other) const { return !(other == *this); }
103
104 /// Exchange this buffer's values with the other buffer's values.
105 inline void swap(LeafBuffer&);
106
107 /// Return the memory footprint of this buffer in bytes.
108 inline Index memUsage() const;
109 inline Index memUsageIfLoaded() const;
110 /// Return the number of values contained in this buffer.
111 static Index size() { return SIZE; }
112
113 /// @brief Return a const pointer to the array of voxel values.
114 /// @details This method guarantees that the buffer is allocated and loaded.
115 /// @warning This method should only be used by experts seeking low-level optimizations.
116 const ValueType* data() const;
117 /// @brief Return a pointer to the array of voxel values.
118 /// @details This method guarantees that the buffer is allocated and loaded.
119 /// @warning This method should only be used by experts seeking low-level optimizations.
120 ValueType* data();
121
122 private:
123 /// If this buffer is empty, return zero, otherwise return the value at index @ i.
124 inline const ValueType& at(Index i) const;
125
126 /// @brief Return a non-const reference to the value at index @a i.
127 /// @details This method is private since it makes assumptions about the
128 /// buffer's memory layout. LeafBuffers associated with custom leaf node types
129 /// (e.g., a bool buffer implemented as a bitmask) might not be able to
130 /// return non-const references to their values.
131 ValueType& operator[](Index i) { return const_cast<ValueType&>(this->at(i)); }
132
133 bool deallocate();
134
135 inline void setOutOfCore(bool b)
136 {
137 (void) b;
138#ifdef OPENVDB_USE_DELAYED_LOADING
139 mOutOfCore = b;
140#endif
141 }
142 // To facilitate inlining in the common case in which the buffer is in-core,
143 // the loading logic is split into a separate function, doLoad().
144 inline void loadValues() const
145 {
146#ifdef OPENVDB_USE_DELAYED_LOADING
147 if (this->isOutOfCore()) this->doLoad();
148#endif
149 }
150 inline void doLoad() const;
151 inline bool detachFromFile();
152
153 using FlagsType = std::atomic<Index32>;
154
155#ifdef OPENVDB_USE_DELAYED_LOADING
156 union {
157 ValueType* mData;
158 FileInfo* mFileInfo;
159 };
160#else
161 ValueType* mData;
162#endif
163 FlagsType mOutOfCore; // interpreted as bool; extra bits reserved for future use
164 tbb::spin_mutex mMutex; // 1 byte
165 //int8_t mReserved[3]; // padding for alignment
166
167 friend class ::TestLeaf;
168 // Allow the parent LeafNode to access this buffer's data pointer.
169 template<typename, Index> friend class LeafNode;
170}; // class LeafBuffer
171
172
173////////////////////////////////////////
174
175
176 template<typename T, Index Log2Dim>
177 inline
178 LeafBuffer<T, Log2Dim>::LeafBuffer(const ValueType& val)
179 : mData(new ValueType[SIZE])
180{
181#ifdef OPENVDB_USE_DELAYED_LOADING
182 mOutOfCore = 0;
183#endif
184 this->fill(val);
185}
186
187
188 template<typename T, Index Log2Dim>
189 inline
190 LeafBuffer<T, Log2Dim>::~LeafBuffer()
191{
192#ifdef OPENVDB_USE_DELAYED_LOADING
193 if (this->isOutOfCore()) {
194 this->detachFromFile();
195 } else {
196 this->deallocate();
197 }
198#else
199 this->deallocate();
200#endif
201}
202
203
204 template<typename T, Index Log2Dim>
205 inline
206 LeafBuffer<T, Log2Dim>::LeafBuffer(const LeafBuffer& other)
207 : mData(nullptr)
208#ifdef OPENVDB_USE_DELAYED_LOADING
209 , mOutOfCore(other.mOutOfCore.load())
210#endif
211{
212#ifdef OPENVDB_USE_DELAYED_LOADING
213 if (other.isOutOfCore()) {
214 mFileInfo = new FileInfo(*other.mFileInfo);
215 } else {
216#endif
217 if (other.mData != nullptr) {
218 this->allocate();
219 ValueType* target = mData;
220 const ValueType* source = other.mData;
221 Index n = SIZE;
222 while (n--) *target++ = *source++;
223 }
224#ifdef OPENVDB_USE_DELAYED_LOADING
225 }
226#endif
227}
228
229
230 template<typename T, Index Log2Dim>
231 inline void
232 LeafBuffer<T, Log2Dim>::setValue(Index i, const ValueType& val)
233{
234 assert(i < SIZE);
235 this->loadValues();
236 if (mData) mData[i] = val;
237}
238
239
240 template<typename T, Index Log2Dim>
241 inline LeafBuffer<T, Log2Dim>&
242 LeafBuffer<T, Log2Dim>::operator=(const LeafBuffer& other)
243{
244 if (&other != this) {
245#ifdef OPENVDB_USE_DELAYED_LOADING
246 if (this->isOutOfCore()) {
247 this->detachFromFile();
248 } else {
249 if (other.isOutOfCore()) this->deallocate();
250 }
251 if (other.isOutOfCore()) {
252 mOutOfCore.store(other.mOutOfCore.load(std::memory_order_acquire),
253 std::memory_order_release);
254 mFileInfo = new FileInfo(*other.mFileInfo);
255 } else {
256#endif
257 if (other.mData != nullptr) {
258 this->allocate();
259 ValueType* target = mData;
260 const ValueType* source = other.mData;
261 Index n = SIZE;
262 while (n--) *target++ = *source++;
263 }
264#ifdef OPENVDB_USE_DELAYED_LOADING
265 }
266#endif
267 }
268 return *this;
269}
270
271
272 template<typename T, Index Log2Dim>
273 inline void
274 LeafBuffer<T, Log2Dim>::fill(const ValueType& val)
275{
276 this->detachFromFile();
277 if (mData != nullptr) {
278 ValueType* target = mData;
279 Index n = SIZE;
280 while (n--) *target++ = val;
281 }
282}
283
284
285 template<typename T, Index Log2Dim>
286 inline bool
287 LeafBuffer<T, Log2Dim>::operator==(const LeafBuffer& other) const
288{
289 this->loadValues();
290 other.loadValues();
291 const ValueType *target = mData, *source = other.mData;
292 if (!target && !source) return true;
293 if (!target || !source) return false;
294 Index n = SIZE;
295 while (n && math::isExactlyEqual(*target++, *source++)) --n;
296 return n == 0;
297}
298
299
300 template<typename T, Index Log2Dim>
301 inline void
302 LeafBuffer<T, Log2Dim>::swap(LeafBuffer& other)
303{
304 std::swap(mData, other.mData);
305#ifdef OPENVDB_USE_DELAYED_LOADING
306 // Two atomics can't be swapped because it would require hardware support:
307 // https://en.wikipedia.org/wiki/Double_compare-and-swap
308 // Note that there's a window in which other.mOutOfCore could be written
309 // between our load from it and our store to it.
310 auto tmp = other.mOutOfCore.load(std::memory_order_acquire);
311 tmp = mOutOfCore.exchange(std::move(tmp));
312 other.mOutOfCore.store(std::move(tmp), std::memory_order_release);
313#endif
314}
315
316
317 template<typename T, Index Log2Dim>
318 inline Index
319 LeafBuffer<T, Log2Dim>::memUsage() const
320{
321 size_t n = sizeof(*this);
322#ifdef OPENVDB_USE_DELAYED_LOADING
323 if (this->isOutOfCore()) n += sizeof(FileInfo);
324 else {
325#endif
326 if (mData) n += SIZE * sizeof(ValueType);
327#ifdef OPENVDB_USE_DELAYED_LOADING
328 }
329#endif
330 return static_cast<Index>(n);
331}
332
333
334 template<typename T, Index Log2Dim>
335 inline Index
336 LeafBuffer<T, Log2Dim>::memUsageIfLoaded() const
337{
338 size_t n = sizeof(*this);
339 n += SIZE * sizeof(ValueType);
340 return static_cast<Index>(n);
341}
342
343
344 template<typename T, Index Log2Dim>
345 inline const typename LeafBuffer<T, Log2Dim>::ValueType*
346 LeafBuffer<T, Log2Dim>::data() const
347{
348 this->loadValues();
349 if (mData == nullptr) {
350 LeafBuffer* self = const_cast<LeafBuffer*>(this);
351#ifdef OPENVDB_USE_DELAYED_LOADING
352 // This lock will be contended at most once.
353 tbb::spin_mutex::scoped_lock lock(self->mMutex);
354#endif
355 if (mData == nullptr) self->mData = new ValueType[SIZE];
356 }
357 return mData;
358}
359
360 template<typename T, Index Log2Dim>
361 inline typename LeafBuffer<T, Log2Dim>::ValueType*
362 LeafBuffer<T, Log2Dim>::data()
363{
364 this->loadValues();
365 if (mData == nullptr) {
366#ifdef OPENVDB_USE_DELAYED_LOADING
367 // This lock will be contended at most once.
368 tbb::spin_mutex::scoped_lock lock(mMutex);
369#endif
370 if (mData == nullptr) mData = new ValueType[SIZE];
371 }
372 return mData;
373}
374
375
376 template<typename T, Index Log2Dim>
377 inline const typename LeafBuffer<T, Log2Dim>::ValueType&
378 LeafBuffer<T, Log2Dim>::at(Index i) const
379{
380 static const ValueType sZero = zeroVal<T>();
381 assert(i < SIZE);
382 this->loadValues();
383 // We can't use the ternary operator here, otherwise Visual C++ returns
384 // a reference to a temporary.
385 if (mData) return mData[i]; else return sZero;
386}
387
388
389 template<typename T, Index Log2Dim>
390 inline bool
391LeafBuffer<T, Log2Dim>::deallocate()
392{
393
394 if (mData != nullptr) {
395#ifdef OPENVDB_USE_DELAYED_LOADING
396 if (this->isOutOfCore()) return false;
397#endif
398 delete[] mData;
399 mData = nullptr;
400 return true;
401 }
402 return false;
403}
404
405
406 template<typename T, Index Log2Dim>
407 inline void
408LeafBuffer<T, Log2Dim>::doLoad() const
409{
410#ifdef OPENVDB_USE_DELAYED_LOADING
411 if (!this->isOutOfCore()) return;
412
413 LeafBuffer<T, Log2Dim>* self = const_cast<LeafBuffer<T, Log2Dim>*>(this);
414
415 // This lock will be contended at most once, after which this buffer
416 // will no longer be out-of-core.
417 tbb::spin_mutex::scoped_lock lock(self->mMutex);
418 if (!this->isOutOfCore()) return;
419
420 std::unique_ptr<FileInfo> info(self->mFileInfo);
421 assert(info.get() != nullptr);
422 assert(info->mapping.get() != nullptr);
423 assert(info->meta.get() != nullptr);
424
425 /// @todo For now, we have to clear the mData pointer in order for allocate() to take effect.
426 self->mData = nullptr;
427 self->allocate();
428
429 SharedPtr<std::streambuf> buf = info->mapping->createBuffer();
430 std::istream is(buf.get());
431
432 io::setStreamMetadataPtr(is, info->meta, /*transfer=*/true);
433
434 NodeMaskType mask;
435 is.seekg(info->maskpos);
436 mask.load(is);
437
438 is.seekg(info->bufpos);
439 io::readCompressedValues(is, self->mData, SIZE, mask, io::getHalfFloat(is));
440
441 self->setOutOfCore(false);
442#endif
443}
444
445
446 template<typename T, Index Log2Dim>
447 inline bool
448LeafBuffer<T, Log2Dim>::detachFromFile()
449{
450#ifdef OPENVDB_USE_DELAYED_LOADING
451 if (this->isOutOfCore()) {
452 delete mFileInfo;
453 mFileInfo = nullptr;
454 this->setOutOfCore(false);
455 return true;
456 }
457#endif
458 return false;
459}
460
461
462////////////////////////////////////////
463
464
465// Partial specialization for bool ValueType
466 template<Index Log2Dim>
467 class LeafBuffer<bool, Log2Dim>
468{
469 public:
470 using NodeMaskType = util::NodeMask<Log2Dim>;
471 using WordType = typename NodeMaskType::Word;
472 using ValueType = bool;
473 using StorageType = WordType;
474
475 static const Index WORD_COUNT = NodeMaskType::WORD_COUNT;
476 static const Index SIZE = 1 << 3 * Log2Dim;
477
478 static inline const bool sOn = true;
479 static inline const bool sOff = false;
480
481 LeafBuffer() {}
482 LeafBuffer(bool on): mData(on) {}
483 LeafBuffer(const NodeMaskType& other): mData(other) {}
484 LeafBuffer(const LeafBuffer& other): mData(other.mData) {}
485 ~LeafBuffer() {}
486 void fill(bool val) { mData.set(val); }
487 LeafBuffer& operator=(const LeafBuffer& b) { if (&b != this) { mData=b.mData; } return *this; }
488
489 const bool& getValue(Index i) const
490 {
491 assert(i < SIZE);
492 // We can't use the ternary operator here, otherwise Visual C++ returns
493 // a reference to a temporary.
494 if (mData.isOn(i)) return sOn; else return sOff;
495 }
496 const bool& operator[](Index i) const { return this->getValue(i); }
497
498 bool operator==(const LeafBuffer& other) const { return mData == other.mData; }
499 bool operator!=(const LeafBuffer& other) const { return mData != other.mData; }
500
501 void setValue(Index i, bool val) { assert(i < SIZE); mData.set(i, val); }
502
503 void swap(LeafBuffer& other) { if (&other != this) std::swap(mData, other.mData); }
504
505 Index memUsage() const { return sizeof(*this); }
506 Index memUsageIfLoaded() const { return sizeof(*this); }
507 static Index size() { return SIZE; }
508
509 /// @brief Return a pointer to the C-style array of words encoding the bits.
510 /// @warning This method should only be used by experts seeking low-level optimizations.
511 WordType* data() { return &(mData.template getWord<WordType>(0)); }
512 /// @brief Return a const pointer to the C-style array of words encoding the bits.
513 /// @warning This method should only be used by experts seeking low-level optimizations.
514 const WordType* data() const { return const_cast<LeafBuffer*>(this)->data(); }
515
516 private:
517 // Allow the parent LeafNode to access this buffer's data.
518 template<typename, Index> friend class LeafNode;
519
520 NodeMaskType mData;
521}; // class LeafBuffer
522
523} // namespace tree
524} // namespace OPENVDB_VERSION_NAME
525} // namespace openvdb
526
527#endif // OPENVDB_TREE_LEAFBUFFER_HAS_BEEN_INCLUDED
Compression.h
NodeMasks.h
Types.h
openvdb::v11_0::PartialCreate
Tag dispatch class that distinguishes constructors during file input.
Definition Types.h:689
openvdb::v11_0::tree::LeafBuffer< bool, Log2Dim >::LeafBuffer
LeafBuffer(const NodeMaskType &other)
Definition LeafBuffer.h:483
openvdb::v11_0::tree::LeafBuffer< bool, Log2Dim >::~LeafBuffer
~LeafBuffer()
Definition LeafBuffer.h:485
openvdb::v11_0::tree::LeafBuffer< bool, Log2Dim >::StorageType
WordType StorageType
Definition LeafBuffer.h:473
openvdb::v11_0::tree::LeafBuffer< bool, Log2Dim >::operator!=
bool operator!=(const LeafBuffer &other) const
Definition LeafBuffer.h:499
openvdb::v11_0::tree::LeafBuffer< bool, Log2Dim >::WordType
typename NodeMaskType::Word WordType
Definition LeafBuffer.h:471
openvdb::v11_0::tree::LeafBuffer< bool, Log2Dim >::memUsage
Index memUsage() const
Definition LeafBuffer.h:505
openvdb::v11_0::tree::LeafBuffer< bool, Log2Dim >::swap
void swap(LeafBuffer &other)
Definition LeafBuffer.h:503
openvdb::v11_0::tree::LeafBuffer< bool, Log2Dim >::data
const WordType * data() const
Return a const pointer to the C-style array of words encoding the bits.
Definition LeafBuffer.h:514
openvdb::v11_0::tree::LeafBuffer< bool, Log2Dim >::operator=
LeafBuffer & operator=(const LeafBuffer &b)
Definition LeafBuffer.h:487
openvdb::v11_0::tree::LeafBuffer< bool, Log2Dim >::operator==
bool operator==(const LeafBuffer &other) const
Definition LeafBuffer.h:498
openvdb::v11_0::tree::LeafBuffer< bool, Log2Dim >::memUsageIfLoaded
Index memUsageIfLoaded() const
Definition LeafBuffer.h:506
openvdb::v11_0::tree::LeafBuffer< bool, Log2Dim >::ValueType
bool ValueType
Definition LeafBuffer.h:472
openvdb::v11_0::tree::LeafBuffer< bool, Log2Dim >::LeafBuffer
LeafBuffer(const LeafBuffer &other)
Definition LeafBuffer.h:484
openvdb::v11_0::tree::LeafBuffer< bool, Log2Dim >::LeafBuffer
LeafBuffer(bool on)
Definition LeafBuffer.h:482
openvdb::v11_0::tree::LeafBuffer< bool, Log2Dim >::operator[]
const bool & operator[](Index i) const
Definition LeafBuffer.h:496
openvdb::v11_0::tree::LeafBuffer< bool, Log2Dim >::fill
void fill(bool val)
Definition LeafBuffer.h:486
openvdb::v11_0::tree::LeafBuffer< bool, Log2Dim >::getValue
const bool & getValue(Index i) const
Definition LeafBuffer.h:489
openvdb::v11_0::tree::LeafBuffer< bool, Log2Dim >::size
static Index size()
Definition LeafBuffer.h:507
openvdb::v11_0::tree::LeafBuffer< bool, Log2Dim >::data
WordType * data()
Return a pointer to the C-style array of words encoding the bits.
Definition LeafBuffer.h:511
openvdb::v11_0::tree::LeafBuffer< bool, Log2Dim >::LeafBuffer
LeafBuffer()
Definition LeafBuffer.h:481
openvdb::v11_0::tree::LeafBuffer< bool, Log2Dim >::setValue
void setValue(Index i, bool val)
Definition LeafBuffer.h:501
openvdb::v11_0::tree::LeafBuffer
Array of fixed size 23Log2Dim that stores the voxel values of a LeafNode.
Definition LeafBuffer.h:31
openvdb::v11_0::tree::LeafBuffer::operator=
LeafBuffer & operator=(const LeafBuffer &)
Copy the other buffer's values into this buffer.
Definition LeafBuffer.h:242
openvdb::v11_0::tree::LeafBuffer::~LeafBuffer
~LeafBuffer()
Destructor.
Definition LeafBuffer.h:190
openvdb::v11_0::tree::LeafBuffer::LeafBuffer
LeafBuffer(PartialCreate, const ValueType &)
Construct a buffer but don't allocate memory for the full array of values.
Definition LeafBuffer.h:61
openvdb::v11_0::tree::LeafBuffer::StorageType
ValueType StorageType
Definition LeafBuffer.h:34
openvdb::v11_0::tree::LeafBuffer::LeafBuffer
LeafBuffer(const ValueType &)
Construct a buffer populated with the specified value.
Definition LeafBuffer.h:178
openvdb::v11_0::tree::LeafBuffer::LeafBuffer
LeafBuffer(const LeafBuffer &)
Copy constructor.
Definition LeafBuffer.h:206
openvdb::v11_0::tree::LeafBuffer::fill
void fill(const ValueType &)
Populate this buffer with a constant value.
Definition LeafBuffer.h:274
openvdb::v11_0::tree::LeafBuffer::operator!=
bool operator!=(const LeafBuffer &other) const
Return true if the contents of the other buffer are not exactly equal to the contents of this buffer.
Definition LeafBuffer.h:102
openvdb::v11_0::tree::LeafBuffer::swap
void swap(LeafBuffer &)
Exchange this buffer's values with the other buffer's values.
Definition LeafBuffer.h:302
openvdb::v11_0::tree::LeafBuffer::isOutOfCore
bool isOutOfCore() const
Return true if this buffer's values have not yet been read from disk.
Definition LeafBuffer.h:71
openvdb::v11_0::tree::LeafBuffer::memUsage
Index memUsage() const
Return the memory footprint of this buffer in bytes.
Definition LeafBuffer.h:319
openvdb::v11_0::tree::LeafBuffer::empty
bool empty() const
Return true if memory for this buffer has not yet been allocated.
Definition LeafBuffer.h:80
openvdb::v11_0::tree::LeafBuffer::memUsageIfLoaded
Index memUsageIfLoaded() const
Definition LeafBuffer.h:336
openvdb::v11_0::tree::LeafBuffer::setValue
void setValue(Index i, const ValueType &)
Set the i'th value of this buffer to the specified value.
Definition LeafBuffer.h:232
openvdb::v11_0::tree::LeafBuffer::size
static Index size()
Return the number of values contained in this buffer.
Definition LeafBuffer.h:111
openvdb::v11_0::tree::LeafBuffer::data
const ValueType * data() const
Return a const pointer to the array of voxel values.
Definition LeafBuffer.h:346
openvdb::v11_0::tree::LeafBuffer::SIZE
static const Index SIZE
Definition LeafBuffer.h:36
openvdb::v11_0::tree::LeafBuffer::data
ValueType * data()
Return a pointer to the array of voxel values.
Definition LeafBuffer.h:362
openvdb::v11_0::tree::LeafBuffer::getValue
const ValueType & getValue(Index i) const
Return a const reference to the i'th element of this buffer.
Definition LeafBuffer.h:88
openvdb::v11_0::tree::LeafBuffer::allocate
bool allocate()
Allocate memory for this buffer if it has not already been allocated.
Definition LeafBuffer.h:82
openvdb::v11_0::tree::LeafBuffer::LeafBuffer
LeafBuffer()
Default constructor.
Definition LeafBuffer.h:50
openvdb::v11_0::tree::LeafBuffer::ValueType
T ValueType
Definition LeafBuffer.h:33
openvdb::v11_0::tree::LeafBuffer::operator[]
const ValueType & operator[](Index i) const
Return a const reference to the i'th element of this buffer.
Definition LeafBuffer.h:90
openvdb::v11_0::tree::LeafBuffer::operator==
bool operator==(const LeafBuffer &) const
Return true if the contents of the other buffer exactly equal the contents of this buffer.
Definition LeafBuffer.h:287
openvdb::v11_0::tree::LeafNode
Templated block class to hold specific data types and a fixed number of values determined by Log2Dim....
Definition LeafNode.h:38
openvdb::v11_0::util::NodeMask
Bit mask for the internal and leaf nodes of VDB. This is a 64-bit implementation.
Definition NodeMasks.h:308
openvdb::v11_0::util::NodeMask::Word
Index64 Word
Definition NodeMasks.h:316
openvdb::v11_0::util::NodeMask::WORD_COUNT
static const Index32 WORD_COUNT
Definition NodeMasks.h:315
openvdb::v11_0::io::getHalfFloat
OPENVDB_API bool getHalfFloat(std::ios_base &)
Return true if floating-point values should be quantized to 16 bits when writing to the given stream ...
openvdb::v11_0::io::readCompressedValues
void readCompressedValues(std::istream &is, ValueT *destBuf, Index destCount, const MaskT &valueMask, bool fromHalf)
Definition Compression.h:465
openvdb::v11_0::io::setStreamMetadataPtr
OPENVDB_API void setStreamMetadataPtr(std::ios_base &, SharedPtr< StreamMetadata > &, bool transfer=true)
Associate the given stream with (a shared pointer to) an object that stores metadata (file format,...
openvdb::v11_0::math::isExactlyEqual
bool isExactlyEqual(const T0 &a, const T1 &b)
Return true if a is exactly equal to b.
Definition Math.h:443
openvdb::v11_0::Index
Index32 Index
Definition Types.h:54
openvdb::v11_0::SharedPtr
std::shared_ptr< T > SharedPtr
Definition Types.h:114
openvdb
Definition Exceptions.h:13
allocate
static pnanovdb_uint32_t allocate(pnanovdb_uint32_t *poffset, pnanovdb_uint32_t size, pnanovdb_uint32_t alignment)
Definition pnanovdb_validate_strides.h:20
OPENVDB_VERSION_NAME
#define OPENVDB_VERSION_NAME
The version namespace name for this library version.
Definition version.h.in:121
OPENVDB_USE_VERSION_NAMESPACE
#define OPENVDB_USE_VERSION_NAMESPACE
Definition version.h.in:212
OPENVDB_USE_DELAYED_LOADING
#define OPENVDB_USE_DELAYED_LOADING
Definition version.h.in:143