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75e7b137d6
Also simplified .zga texture and .aqs savegame loading. Dropped support for "crunched" .sav files (those were never used), and the corresponding crunch functions. To be done: Temp files are still used when compressing files, will address this in a later commit.
59 lines
1.7 KiB
C++
59 lines
1.7 KiB
C++
#ifndef DEFLATE_COMPRESSOR_H
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#define DEFLATE_COMPRESSOR_H
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#include "ByteBuffer.h"
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// implements a raw deflate stream, not zlib wrapped, and not checksummed.
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class DeflateCompressor : public ByteBuffer
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{
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public:
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DeflateCompressor();
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DeflateCompressor(void *buf, uint32 size, Mode mode = COPY, delete_func del = NULL, uint32 extra = 0);
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virtual ~DeflateCompressor() {}
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virtual void Compress(uint8 level = 1);
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virtual void Decompress(void);
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bool Compressed(void) const { return _iscompressed; }
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void Compressed(bool b) { _iscompressed = b; }
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uint32 RealSize(void) const { return _iscompressed ? _real_size : size(); }
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void RealSize(uint32 realsize) { _real_size = realsize; }
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void clear(void) // not required to be strictly virtual; be careful not to mess up static types!
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{
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ByteBuffer::clear();
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_real_size = 0;
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_iscompressed = false;
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}
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protected:
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int _windowBits; // read zlib docs to know what this means
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unsigned int _real_size;
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bool _forceCompress;
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bool _iscompressed;
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private:
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static void decompress(void *dst, uint32 *origsize, const void *src, uint32 size, int wbits);
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static void compress(void* dst, uint32 *dst_size, const void* src, uint32 src_size,
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uint8 level, int wbits);
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int decompressBlockwise();
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};
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// implements deflate stream, zlib wrapped
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class ZlibCompressor : public DeflateCompressor
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{
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public:
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ZlibCompressor();
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virtual ~ZlibCompressor() {}
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};
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// the output produced by this stream contains a minimal gzip header,
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// and can be directly written to a .gz file.
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class GzipCompressor : public DeflateCompressor
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{
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public:
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GzipCompressor();
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virtual ~GzipCompressor() {}
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virtual void Decompress(void);
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};
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#endif
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