141 lines
4.4 KiB
C++
141 lines
4.4 KiB
C++
/*******************************************************************************
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Copyright (c) 2005-2009 David Williams
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source
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distribution.
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*******************************************************************************/
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#ifndef __PolyVox_FilePager_H__
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#define __PolyVox_FilePager_H__
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#include "PolyVoxCore/Impl/TypeDef.h"
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#include "PolyVoxCore/Pager.h"
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#include <fstream>
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#include <stdexcept>
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#include <string>
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namespace PolyVox
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{
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/**
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* Provides an interface for performing paging of data.
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*/
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template <typename VoxelType>
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class FilePager : public Pager<typename VoxelType>
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{
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public:
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/// Constructor
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FilePager(const std::string& strFolderName)
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:Pager()
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,m_strFolderName(strFolderName)
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{
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}
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/// Destructor
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virtual ~FilePager() {};
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virtual void pageIn(const Region& region, Block<VoxelType>* pBlockData)
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{
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POLYVOX_ASSERT(pBlockData, "Attempting to page in NULL block");
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POLYVOX_ASSERT(pBlockData->m_bIsCompressed, "Attempting to page in uncompressed block");
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std::stringstream ss;
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ss << region.getLowerX() << "_" << region.getLowerY() << "_" << region.getLowerZ() << "_"
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<< region.getUpperX() << "_" << region.getUpperY() << "_" << region.getUpperZ();
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std::string filename = m_strFolderName + ss.str();
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// FIXME - This should be replaced by C++ style IO, but currently this causes problems with
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// the gameplay-cubiquity integration. See: https://github.com/blackberry/GamePlay/issues/919
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FILE* pFile = fopen(filename.c_str(), "rb");
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if(pFile)
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{
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logTrace() << "Paging in data for " << region;
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fseek(pFile, 0L, SEEK_END);
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pBlockData->m_uCompressedDataLength = ftell(pFile);
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fseek(pFile, 0L, SEEK_SET);
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delete[] pBlockData->m_pCompressedData;
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pBlockData->m_pCompressedData = new uint8_t[pBlockData->m_uCompressedDataLength];
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fread(pBlockData->m_pCompressedData, sizeof(uint8_t), pBlockData->m_uCompressedDataLength, pFile);
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if(ferror(pFile))
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{
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POLYVOX_THROW(std::runtime_error, "Error reading in block data, even though a file exists.");
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}
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fclose(pFile);
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}
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else
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{
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logTrace() << "No data found for " << region << " during paging in.";
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}
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}
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virtual void pageOut(const Region& region, Block<VoxelType>* pBlockData)
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{
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POLYVOX_ASSERT(pBlockData, "Attempting to page out NULL block");
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POLYVOX_ASSERT(pBlockData->m_bIsCompressed, "Attempting to page out uncompressed block");
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logTrace() << "Paging out data for " << region;
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std::stringstream ss;
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ss << region.getLowerX() << "_" << region.getLowerY() << "_" << region.getLowerZ() << "_"
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<< region.getUpperX() << "_" << region.getUpperY() << "_" << region.getUpperZ();
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std::string filename = m_strFolderName + ss.str();
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// FIXME - This should be replaced by C++ style IO, but currently this causes problems with
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// the gameplay-cubiquity integration. See: https://github.com/blackberry/GamePlay/issues/919
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FILE* pFile = fopen(filename.c_str(), "wb");
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if(!pFile)
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{
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POLYVOX_THROW(std::runtime_error, "Unable to open file to write out block data.");
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}
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fwrite(pBlockData->m_pCompressedData, sizeof(uint8_t), pBlockData->m_uCompressedDataLength, pFile);
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if(ferror(pFile))
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{
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POLYVOX_THROW(std::runtime_error, "Error writing out block data.");
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}
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fclose(pFile);
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}
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virtual void dataRequiredHandler(const ConstVolumeProxy<VoxelType>& volumeProxy, const Region& region)
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{
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}
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virtual void dataOverflowHandler(const ConstVolumeProxy<VoxelType>& volumeProxy, const Region& region)
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{
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}
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protected:
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std::string m_strFolderName;
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};
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}
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#endif //__PolyVox_FilePager_H__
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