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Adding new caching mechanism.

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This commit is contained in:
David Williams 2013-07-11 14:50:06 +02:00
parent a589c6e4ac
commit abd1920d80
2 changed files with 22 additions and 0 deletions
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1
library/PolyVoxCore/include/PolyVoxCore/LargeVolume.h
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@ -334,6 +334,7 @@ namespace PolyVox
void eraseBlock(typename std::map<Vector3DInt32, Block<VoxelType>, BlockPositionCompare>::iterator itBlock) const;
// The block data
mutable std::map<Vector3DInt32, VoxelType*, BlockPositionCompare> m_pUncompressedBlockCache;
mutable std::map<Vector3DInt32, Block<VoxelType>, BlockPositionCompare> m_pBlocks;
// The cache of uncompressed blocks. The uncompressed block data and the timestamps are stored here rather

21
library/PolyVoxCore/include/PolyVoxCore/LargeVolume.inl
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@ -638,6 +638,27 @@ namespace PolyVox
//Get the block and mark that we accessed it
Block<VoxelType>* block = getCompressedBlock(uBlockX, uBlockY, uBlockZ);
typename std::map<Vector3DInt32, VoxelType*, BlockPositionCompare>::iterator itUncompressedBlock = m_pUncompressedBlockCache.find(v3dBlockPos);
// check whether the block is already loaded
if(itUncompressedBlock == m_pUncompressedBlockCache.end())
{
VoxelType* pUncompressedBlock = new VoxelType[m_uBlockSideLength * m_uBlockSideLength * m_uBlockSideLength];
void* pSrcData = reinterpret_cast<void*>(block->m_pCompressedData);
void* pDstData = reinterpret_cast<void*>(pUncompressedBlock);
uint32_t uSrcLength = block->m_uCompressedDataLength;
uint32_t uDstLength = m_uBlockSideLength * m_uBlockSideLength * m_uBlockSideLength * sizeof(VoxelType);
//MinizCompressor compressor;
//RLECompressor<VoxelType, uint16_t> compressor;
uint32_t uUncompressedLength = m_pCompressor->decompress(pSrcData, uSrcLength, pDstData, uDstLength);
POLYVOX_ASSERT(uUncompressedLength == m_uBlockSideLength * m_uBlockSideLength * m_uBlockSideLength * sizeof(VoxelType), "Destination length has changed.");
itUncompressedBlock = m_pUncompressedBlockCache.insert(std::make_pair(v3dBlockPos, pUncompressedBlock)).first;
}
if(block->hasUncompressedData())
{
return block;