mirror of
https://github.com/id-Software/DOOM-3-BFG.git
synced 2024-12-13 05:50:51 +00:00
214 lines
5.4 KiB
C++
214 lines
5.4 KiB
C++
/*
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===========================================================================
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Doom 3 BFG Edition GPL Source Code
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Copyright (C) 1993-2012 id Software LLC, a ZeniMax Media company.
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This file is part of the Doom 3 BFG Edition GPL Source Code ("Doom 3 BFG Edition Source Code").
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Doom 3 BFG Edition Source Code is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Doom 3 BFG Edition Source Code is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Doom 3 BFG Edition Source Code. If not, see <http://www.gnu.org/licenses/>.
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In addition, the Doom 3 BFG Edition Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 BFG Edition Source Code. If not, please request a copy in writing from id Software at the address below.
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If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
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===========================================================================
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*/
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#ifndef __SWF_BITSTREAM_H__
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#define __SWF_BITSTREAM_H__
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class idSWFBitStream
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{
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public:
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idSWFBitStream();
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idSWFBitStream( const byte* data, uint32 len, bool copy )
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{
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free = false;
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Load( data, len, copy );
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}
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~idSWFBitStream()
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{
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Free();
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}
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idSWFBitStream& operator=( idSWFBitStream& other );
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void Load( const byte* data, uint32 len, bool copy );
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void Free();
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const byte* Ptr()
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{
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return startp;
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}
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uint32 Length() const
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{
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return ( uint32 )( endp - startp );
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}
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uint32 Tell() const
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{
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return ( uint32 )( readp - startp );
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}
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void Seek( int32 offset )
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{
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readp += offset;
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}
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void Rewind()
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{
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readp = startp;
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}
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void ResetBits();
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int ReadS( unsigned int numBits );
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unsigned int ReadU( unsigned int numBits );
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bool ReadBool();
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const byte* ReadData( int size );
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template< typename T >
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void ReadLittle( T& val );
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uint8 ReadU8();
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uint16 ReadU16();
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uint32 ReadU32();
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int16 ReadS16();
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int32 ReadS32();
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uint32 ReadEncodedU32();
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float ReadFixed8();
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float ReadFixed16();
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float ReadFloat();
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double ReadDouble();
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const char* ReadString();
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void ReadRect( swfRect_t& rect );
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void ReadMatrix( swfMatrix_t& matrix );
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void ReadColorXFormRGBA( swfColorXform_t& cxf );
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void ReadColorRGB( swfColorRGB_t& color );
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void ReadColorRGBA( swfColorRGBA_t& color );
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void ReadGradient( swfGradient_t& grad, bool rgba );
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void ReadMorphGradient( swfGradient_t& grad );
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private:
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bool free;
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const byte* startp;
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const byte* endp;
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const byte* readp;
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uint64 currentBit;
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uint64 currentByte;
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int ReadInternalS( uint64& regCurrentBit, uint64& regCurrentByte, unsigned int numBits );
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unsigned int ReadInternalU( uint64& regCurrentBit, uint64& regCurrentByte, unsigned int numBits );
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};
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/*
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========================
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idSWFBitStream::ResetBits
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========================
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*/
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ID_INLINE void idSWFBitStream::ResetBits()
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{
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currentBit = 0;
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currentByte = 0;
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}
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/*
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========================
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idSWFBitStream::ReadLittle
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========================
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*/
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template< typename T >
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void idSWFBitStream::ReadLittle( T& val )
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{
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val = *( T* )ReadData( sizeof( val ) );
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idSwap::Little( val );
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}
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/*
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========================
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Wrappers for the most basic types
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========================
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*/
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ID_INLINE bool idSWFBitStream::ReadBool()
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{
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return ( ReadU( 1 ) != 0 );
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}
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ID_INLINE uint8 idSWFBitStream::ReadU8()
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{
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ResetBits();
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return *readp++;
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}
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ID_INLINE uint16 idSWFBitStream::ReadU16()
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{
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ResetBits();
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readp += 2;
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return ( readp[-2] | ( readp[-1] << 8 ) );
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}
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ID_INLINE uint32 idSWFBitStream::ReadU32()
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{
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ResetBits();
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readp += 4;
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return ( readp[-4] | ( readp[-3] << 8 ) | ( readp[-2] << 16 ) | ( readp[-1] << 24 ) );
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}
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ID_INLINE int16 idSWFBitStream::ReadS16()
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{
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ResetBits();
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readp += 2;
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return ( readp[-2] | ( readp[-1] << 8 ) );
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}
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ID_INLINE int32 idSWFBitStream::ReadS32()
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{
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ResetBits();
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readp += 4;
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return ( readp[-4] | ( readp[-3] << 8 ) | ( readp[-2] << 16 ) | ( readp[-1] << 24 ) );
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}
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ID_INLINE float idSWFBitStream::ReadFixed8()
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{
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ResetBits();
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readp += 2;
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return SWFFIXED8( ( readp[-2] | ( readp[-1] << 8 ) ) );
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}
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ID_INLINE float idSWFBitStream::ReadFixed16()
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{
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ResetBits();
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readp += 4;
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return SWFFIXED16( ( readp[-4] | ( readp[-3] << 8 ) | ( readp[-2] << 16 ) | ( readp[-1] << 24 ) ) );
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}
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ID_INLINE float idSWFBitStream::ReadFloat()
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{
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ResetBits();
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readp += 4;
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uint32 i = ( readp[-4] | ( readp[-3] << 8 ) | ( readp[-2] << 16 ) | ( readp[-1] << 24 ) );
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return ( float& )i;
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}
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ID_INLINE double idSWFBitStream::ReadDouble()
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{
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const byte* swfIsRetarded = ReadData( 8 );
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byte buffer[8];
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buffer[0] = swfIsRetarded[4];
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buffer[1] = swfIsRetarded[5];
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buffer[2] = swfIsRetarded[6];
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buffer[3] = swfIsRetarded[7];
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buffer[4] = swfIsRetarded[0];
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buffer[5] = swfIsRetarded[1];
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buffer[6] = swfIsRetarded[2];
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buffer[7] = swfIsRetarded[3];
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double d = *( double* )buffer;
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idSwap::Little( d );
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return d;
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}
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#endif // !__SWF_BITSTREAM_H__
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