mirror of
https://github.com/ptitSeb/Serious-Engine
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83 lines
3.0 KiB
C++
83 lines
3.0 KiB
C++
/* Copyright (c) 2002-2012 Croteam Ltd. All rights reserved. */
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#ifndef SE_INCL_COMPRESSION_H
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#define SE_INCL_COMPRESSION_H
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#ifdef PRAGMA_ONCE
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#pragma once
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#endif
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/*
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* Abstract base class for objects that can compress memory blocks.
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*/
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class CCompressor {
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public:
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/* Calculate needed size for destination buffer when packing memory with given compression. */
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virtual SLONG NeededDestinationSize(SLONG slSourceSize) = 0;
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// on entry, slDstSize holds maximum size of output buffer,
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// on exit, it is filled with resulting size
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/* Pack a chunk of data using given compression. */
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virtual BOOL Pack(const void *pvSrc, SLONG slSrcSize, void *pvDst, SLONG &slDstSize) = 0;
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/* Unpack a chunk of data using given compression. */
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virtual BOOL Unpack(const void *pvSrc, SLONG slSrcSize, void *pvDst, SLONG &slDstSize) = 0;
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/* Pack/unpack from stream to stream. */
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void UnpackStream_t(CTMemoryStream &strmSrc, CTStream &strmDst); // throw char *
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void PackStream_t(CTMemoryStream &strmSrc, CTStream &strmDst); // throw char *
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};
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/*
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* Compressor for compressing memory blocks using RLE BYTE-BYTE compression
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*/
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class CRLEBBCompressor : public CCompressor {
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public:
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/* Calculate needed size for destination buffer when packing memory. */
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SLONG NeededDestinationSize(SLONG slSourceSize);
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// on entry, slDstSize holds maximum size of output buffer,
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// on exit, it is filled with resulting size
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/* Pack a chunk of data using given compression. */
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BOOL Pack(const void *pvSrc, SLONG slSrcSize, void *pvDst, SLONG &slDstSize);
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/* Unpack a chunk of data using given compression. */
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BOOL Unpack(const void *pvSrc, SLONG slSrcSize, void *pvDst, SLONG &slDstSize);
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};
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/*
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* Compressor for compressing memory blocks using LZ compression
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* (uses LZRW1 - a modification by Ross Williams)
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*/
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class CLZCompressor : public CCompressor {
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public:
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/* Calculate needed size for destination buffer when packing memory. */
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SLONG NeededDestinationSize(SLONG slSourceSize);
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// on entry, slDstSize holds maximum size of output buffer,
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// on exit, it is filled with resulting size
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/* Pack a chunk of data using given compression. */
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BOOL Pack(const void *pvSrc, SLONG slSrcSize, void *pvDst, SLONG &slDstSize);
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/* Unpack a chunk of data using given compression. */
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BOOL Unpack(const void *pvSrc, SLONG slSrcSize, void *pvDst, SLONG &slDstSize);
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};
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/*
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* Compressor for compressing memory blocks using zlib compression
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* (zlib uses LZ77 - algorithm)
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*/
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class CzlibCompressor : public CCompressor {
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public:
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/* Calculate needed size for destination buffer when packing memory. */
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SLONG NeededDestinationSize(SLONG slSourceSize);
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// on entry, slDstSize holds maximum size of output buffer,
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// on exit, it is filled with resulting size
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/* Pack a chunk of data using given compression. */
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BOOL Pack(const void *pvSrc, SLONG slSrcSize, void *pvDst, SLONG &slDstSize);
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/* Unpack a chunk of data using given compression. */
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BOOL Unpack(const void *pvSrc, SLONG slSrcSize, void *pvDst, SLONG &slDstSize);
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};
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#endif /* include-once check. */
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