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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#include "vtkDataCompressor.h"
#include "vtkUnsignedCharArray.h"
//------------------------------------------------------------------------------
VTK_ABI_NAMESPACE_BEGIN
vtkDataCompressor::vtkDataCompressor() = default;
//------------------------------------------------------------------------------
vtkDataCompressor::~vtkDataCompressor() = default;
//------------------------------------------------------------------------------
void vtkDataCompressor::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
//------------------------------------------------------------------------------
size_t vtkDataCompressor::Compress(unsigned char const* uncompressedData, size_t uncompressedSize,
unsigned char* compressedData, size_t compressionSpace)
{
return this->CompressBuffer(uncompressedData, uncompressedSize, compressedData, compressionSpace);
}
//------------------------------------------------------------------------------
size_t vtkDataCompressor::Uncompress(unsigned char const* compressedData, size_t compressedSize,
unsigned char* uncompressedData, size_t uncompressedSize)
{
return this->UncompressBuffer(compressedData, compressedSize, uncompressedData, uncompressedSize);
}
//------------------------------------------------------------------------------
vtkUnsignedCharArray* vtkDataCompressor::Compress(
unsigned char const* uncompressedData, size_t uncompressedSize)
{
// Get the amount of space needed for compressed data.
size_t compressionSpace = this->GetMaximumCompressionSpace(uncompressedSize);
// Allocate a buffer.
vtkUnsignedCharArray* outputArray = vtkUnsignedCharArray::New();
outputArray->SetNumberOfComponents(1);
outputArray->SetNumberOfTuples(static_cast<vtkIdType>(compressionSpace));
unsigned char* compressedData = outputArray->GetPointer(0);
// Compress the data.
size_t compressedSize =
this->CompressBuffer(uncompressedData, uncompressedSize, compressedData, compressionSpace);
// Make sure compression succeeded.
if (!compressedSize)
{
outputArray->Delete();
return nullptr;
}
// Store the actual size.
outputArray->SetNumberOfTuples(static_cast<vtkIdType>(compressedSize));
return outputArray;
}
//------------------------------------------------------------------------------
vtkUnsignedCharArray* vtkDataCompressor::Uncompress(
unsigned char const* compressedData, size_t compressedSize, size_t uncompressedSize)
{
// Allocate a buffer.
vtkUnsignedCharArray* outputArray = vtkUnsignedCharArray::New();
outputArray->SetNumberOfComponents(1);
outputArray->SetNumberOfTuples(static_cast<vtkIdType>(uncompressedSize));
unsigned char* uncompressedData = outputArray->GetPointer(0);
// Decompress the data.
size_t decSize =
this->UncompressBuffer(compressedData, compressedSize, uncompressedData, uncompressedSize);
// Make sure the decompression succeeded.
if (!decSize)
{
outputArray->Delete();
return nullptr;
}
// Store the actual size.
outputArray->SetNumberOfTuples(static_cast<vtkIdType>(decSize));
return outputArray;
}
VTK_ABI_NAMESPACE_END
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