69 lines
1.9 KiB
C++
69 lines
1.9 KiB
C++
#include "PolyVoxCore/MinizCompressor.h"
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// Diable things we don't need, and in particular the zlib compatible names which
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// would cause conflicts if a user application is using both PolyVox and zlib.
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#define MINIZ_NO_STDIO
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#define MINIZ_NO_ARCHIVE_APIS
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#define MINIZ_NO_TIME
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//#define MINIZ_NO_ZLIB_APIS
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#define MINIZ_NO_ZLIB_COMPATIBLE_NAMES
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//#define MINIZ_NO_MALLOC
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#include "PolyVoxCore/Impl/ErrorHandling.h"
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// For some unknown reason the miniz library is supplied only as a
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// single .c file without a header. Apparently the only way to use
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// it is then to #include it directly which is what the examples do.
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#include "PolyVoxCore/Impl/miniz.c"
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#include <sstream>
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using namespace std;
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namespace PolyVox
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{
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MinizCompressor::MinizCompressor()
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{
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}
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MinizCompressor::~MinizCompressor()
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{
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}
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uint32_t MinizCompressor::getMaxCompressedSize(uint32_t uUncompressedInputSize)
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{
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return static_cast<uint32_t>(mz_compressBound(static_cast<mz_ulong>(uUncompressedInputSize)));
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}
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uint32_t MinizCompressor::compress(void* pSrcData, uint32_t uSrcLength, void* pDstData, uint32_t uDstLength)
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{
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mz_ulong ulDstLength = uDstLength;
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// Do the compression
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int result = mz_compress((unsigned char*)pDstData, &ulDstLength, (const unsigned char*) pSrcData, uSrcLength);
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if(result != MZ_OK)
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{
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stringstream ss;
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ss << "mz_compress() failed with return code '" << result << "'";
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POLYVOX_THROW(std::runtime_error, ss.str());
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}
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// Return the number of bytes written to the output.
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return ulDstLength;
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}
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uint32_t MinizCompressor::decompress(void* pSrcData, uint32_t uSrcLength, void* pDstData, uint32_t uDstLength)
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{
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mz_ulong ulDstLength = uDstLength;
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int result = mz_uncompress((unsigned char*) pDstData, &ulDstLength, (const unsigned char*) pSrcData, uSrcLength);
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if(result != MZ_OK)
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{
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stringstream ss;
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ss << "mz_uncompress() failed with return code '" << result << "'";
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POLYVOX_THROW(std::runtime_error, ss.str());
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}
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return ulDstLength;
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}
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}
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