AnotherFoxGuy/polyvox
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Looks like RLECompressor works as well.

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This commit is contained in:
Daviw Williams 2013-01-30 16:58:13 +01:00
parent a1cdf78250
commit 924744c5e6
3 changed files with 8 additions and 61 deletions
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64
library/PolyVoxCore/include/PolyVoxCore/Impl/Block.inl
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@ -25,6 +25,7 @@ freely, subject to the following restrictions:
#include "PolyVoxCore/Impl/Utility.h"
#include "PolyVoxCore/MinizCompressor.h"
#include "PolyVoxCore/RLECompressor.h"
#include "PolyVoxCore/Vector.h"
#include "PolyVoxCore/Impl/ErrorHandling.h"
@ -156,7 +157,8 @@ namespace PolyVox
uint32_t uSrcLength = m_uSideLength * m_uSideLength * m_uSideLength * sizeof(VoxelType);
uint32_t uDstLength = 1000000;
MinizCompressor compressor;
//MinizCompressor compressor;
RLECompressor<VoxelType, uint16_t> compressor;
uint32_t uCompressedLength = compressor.compress(pSrcData, uSrcLength, pDstData, uDstLength);
m_pCompressedData = reinterpret_cast<void*>( new uint8_t[uCompressedLength] );
@ -164,45 +166,6 @@ namespace PolyVox
m_uCompressedDataLength = uCompressedLength;
delete pDstData;
/*Data src;
src.ptr = reinterpret_cast<uint8_t*>(m_tUncompressedData);
src.length = m_uSideLength * m_uSideLength * m_uSideLength * sizeof(VoxelType);
Data compressedResult = polyvox_compress(src);
m_pCompressedData = compressedResult.ptr;
m_uCompressedDataLength = compressedResult.length;*/
/*uint32_t uNoOfVoxels = m_uSideLength * m_uSideLength * m_uSideLength;
m_vecCompressedData.clear();
RunlengthEntry<uint16_t> entry;
entry.length = 1;
entry.value = m_tUncompressedData[0];
for(uint32_t ct = 1; ct < uNoOfVoxels; ++ct)
{
VoxelType value = m_tUncompressedData[ct];
if((value == entry.value) && (entry.length < entry.maxRunlength()))
{
entry.length++;
}
else
{
m_vecCompressedData.push_back(entry);
entry.value = value;
entry.length = 1;
}
}
m_vecCompressedData.push_back(entry);
//Shrink the vectors to their contents (maybe slow?):
//http://stackoverflow.com/questions/1111078/reduce-the-capacity-of-an-stl-vector
//C++0x may have a shrink_to_fit() function?
std::vector< RunlengthEntry<uint16_t> >(m_vecCompressedData).swap(m_vecCompressedData);*/
}
//Flag the uncompressed data as no longer being used.
@ -216,14 +179,6 @@ namespace PolyVox
{
POLYVOX_ASSERT(m_bIsCompressed == true, "Attempted to uncompress block which is not flagged as compressed.");
POLYVOX_ASSERT(m_tUncompressedData == 0, "Uncompressed data already exists.");
/*m_tUncompressedData = new VoxelType[m_uSideLength * m_uSideLength * m_uSideLength];
VoxelType* pUncompressedData = m_tUncompressedData;
for(uint32_t ct = 0; ct < m_vecCompressedData.size(); ++ct)
{
std::fill(pUncompressedData, pUncompressedData + m_vecCompressedData[ct].length, m_vecCompressedData[ct].value);
pUncompressedData += m_vecCompressedData[ct].length;
}*/
m_tUncompressedData = new VoxelType[m_uSideLength * m_uSideLength * m_uSideLength];
@ -232,19 +187,10 @@ namespace PolyVox
uint32_t uSrcLength = m_uCompressedDataLength;
uint32_t uDstLength = m_uSideLength * m_uSideLength * m_uSideLength * sizeof(VoxelType);
MinizCompressor compressor;
//MinizCompressor compressor;
RLECompressor<VoxelType, uint16_t> compressor;
uint32_t uUncompressedLength = compressor.decompress(pSrcData, uSrcLength, pDstData, uDstLength);
/*Data src;
src.ptr = m_pCompressedData;
src.length = m_uCompressedDataLength;
Data dst;
dst.ptr = reinterpret_cast<uint8_t*>(m_tUncompressedData);
dst.length = m_uSideLength * m_uSideLength * m_uSideLength * sizeof(VoxelType);
polyvox_decompress(src, dst);*/
POLYVOX_ASSERT(uUncompressedLength == m_uSideLength * m_uSideLength * m_uSideLength * sizeof(VoxelType), "Destination length has changed.");
//m_tUncompressedData = reinterpret_cast<VoxelType*>(uncompressedResult.ptr);

2
library/PolyVoxCore/include/PolyVoxCore/RLECompressor.h
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@ -1,7 +1,7 @@
#ifndef __PolyVox_RLECompressor_H__
#define __PolyVox_RLECompressor_H__
#include <cstdint>
#include "PolyVoxCore/Impl/TypeDef.h"
template<typename ValueType, typename LengthType>
class RLECompressor

3
library/PolyVoxCore/include/PolyVoxCore/RLECompressor.inl
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@ -1,5 +1,6 @@
#include <algorithm>
#include <cassert>
#include <limits>
template<typename ValueType, typename LengthType>
RLECompressor<ValueType, LengthType>::RLECompressor()
@ -35,7 +36,7 @@ uint32_t RLECompressor<ValueType, LengthType>::compress(void* pSrcData, uint32_t
while(pSrcDataAsInt < pSrcDataEnd)
{
if((*pSrcDataAsInt == pDstDataAsRun->value) && (pDstDataAsRun->length < std::numeric_limits<LengthType>::max()))
if((*pSrcDataAsInt == pDstDataAsRun->value) && (pDstDataAsRun->length < (std::numeric_limits<LengthType>::max)()))
{
pDstDataAsRun->length++;
}