572 lines
16 KiB
C++
572 lines
16 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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//===========================================================================//
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#include "bitmap/psd.h"
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#include "tier0/dbg.h"
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#include "tier1/utlbuffer.h"
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#include "filesystem.h"
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#include "tier2/tier2.h"
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#include "tier2/utlstreambuffer.h"
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#include "bitmap/imageformat.h"
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#include "bitmap/bitmap.h"
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// memdbgon must be the last include file in a .cpp file!!!
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#include "tier0/memdbgon.h"
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//-----------------------------------------------------------------------------
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// The PSD signature bytes
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//-----------------------------------------------------------------------------
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#define PSD_SIGNATURE 0x38425053
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#define PSD_IMGRES_SIGNATURE 0x3842494D
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//-----------------------------------------------------------------------------
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// Format of the PSD header on disk
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// NOTE: PSD file header, everything is bigendian
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//-----------------------------------------------------------------------------
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#pragma pack (1)
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enum PSDMode_t
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{
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MODE_GREYSCALE = 1,
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MODE_PALETTIZED = 2,
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MODE_RGBA = 3,
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MODE_CMYK = 4,
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MODE_MULTICHANNEL = 7,
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MODE_LAB = 9,
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MODE_COUNT = 10,
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};
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//////////////////////////////////////////////////////////////////////////
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//
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// BEGIN PSD FILE:
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//
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// PSDHeader_t
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// unsigned int numBytesPalette;
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// byte palette[ numBytesPalette ]; = { (all red palette entries), (all green palette entries), (all blue palette entries) }, where numEntries = numBytesPalette/3;
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// unsigned int numBytesImgResources;
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// byte imgresources[ numBytesImgResources ]; = { sequence of PSDImgResEntry_t }
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// unsigned int numBytesLayers;
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// byte layers[ numBytesLayers ];
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// unsigned short uCompressionInfo;
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// < ~ image data ~ >
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//
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// END PSD FILE
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//
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//////////////////////////////////////////////////////////////////////////
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struct PSDHeader_t
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{
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unsigned int m_nSignature;
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unsigned short m_nVersion;
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unsigned char m_pReserved[6];
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unsigned short m_nChannels;
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unsigned int m_nRows;
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unsigned int m_nColumns;
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unsigned short m_nDepth;
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unsigned short m_nMode;
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};
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struct PSDPalette_t
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{
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unsigned char *m_pRed;
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unsigned char *m_pGreen;
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unsigned char *m_pBlue;
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};
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//-----------------------------------------------------------------------------
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// NOTE: This is how we could load files using file mapping
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//-----------------------------------------------------------------------------
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//HANDLE File = CreateFile(FileName,GENERIC_READ,0,0,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,0);
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//Assert(File != INVALID_HANDLE_VALUE);
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//HANDLE FileMap = CreateFileMapping(File,0,PAGE_READONLY,0,0,0);
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//Assert(FileMap != INVALID_HANDLE_VALUE);
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//void *FileData = MapViewOfFile(FileMap,FILE_MAP_READ,0,0,0);
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//-----------------------------------------------------------------------------
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// Is it a PSD file?
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//-----------------------------------------------------------------------------
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bool IsPSDFile( CUtlBuffer &buf )
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{
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int nGet = buf.TellGet();
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PSDHeader_t header;
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buf.Get( &header, sizeof(header) );
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buf.SeekGet( CUtlBuffer::SEEK_HEAD, nGet );
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if ( BigLong( header.m_nSignature ) != PSD_SIGNATURE )
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return false;
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if ( BigShort( header.m_nVersion ) != 1 )
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return false;
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return ( BigShort( header.m_nDepth ) == 8 );
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}
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bool IsPSDFile( const char *pFileName, const char *pPathID )
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{
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CUtlBuffer buf;
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if ( !g_pFullFileSystem->ReadFile( pFileName, pPathID, buf, sizeof(PSDHeader_t) ) )
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{
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Warning( "Unable to read file %s\n", pFileName );
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return false;
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}
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return IsPSDFile( buf );
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}
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//-----------------------------------------------------------------------------
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// Returns information about the PSD file
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//-----------------------------------------------------------------------------
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bool PSDGetInfo( CUtlBuffer &buf, int *pWidth, int *pHeight, ImageFormat *pImageFormat, float *pSourceGamma )
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{
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int nGet = buf.TellGet();
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PSDHeader_t header;
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buf.Get( &header, sizeof(header) );
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buf.SeekGet( CUtlBuffer::SEEK_HEAD, nGet );
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if ( BigLong( header.m_nSignature ) != PSD_SIGNATURE )
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return false;
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if ( BigShort( header.m_nVersion ) != 1 )
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return false;
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if ( BigShort( header.m_nDepth ) != 8 )
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return false;
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*pWidth = BigLong( header.m_nColumns );
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*pHeight = BigLong( header.m_nRows );
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*pImageFormat = BigShort( header.m_nChannels ) == 3 ? IMAGE_FORMAT_RGB888 : IMAGE_FORMAT_RGBA8888;
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*pSourceGamma = ARTWORK_GAMMA;
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return true;
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}
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bool PSDGetInfo( const char *pFileName, const char *pPathID, int *pWidth, int *pHeight, ImageFormat *pImageFormat, float *pSourceGamma )
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{
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CUtlBuffer buf;
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if ( !g_pFullFileSystem->ReadFile( pFileName, pPathID, buf, sizeof(PSDHeader_t) ) )
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{
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Warning( "Unable to read file %s\n", pFileName );
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return false;
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}
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return PSDGetInfo( buf, pWidth, pHeight, pImageFormat, pSourceGamma );
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}
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//-----------------------------------------------------------------------------
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// Get PSD file image resources
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//-----------------------------------------------------------------------------
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PSDImageResources PSDGetImageResources( CUtlBuffer &buf )
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{
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int nGet = buf.TellGet();
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// Header
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PSDHeader_t header;
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buf.Get( &header, sizeof( header ) );
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// Then palette
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unsigned int numBytesPalette = BigLong( buf.GetUnsignedInt() );
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buf.SeekGet( CUtlBuffer::SEEK_CURRENT, numBytesPalette );
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// Then image resources
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unsigned int numBytesImgResources = BigLong( buf.GetUnsignedInt() );
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PSDImageResources imgres( numBytesImgResources, ( unsigned char * ) buf.PeekGet() );
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// Restore the seek
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buf.SeekGet( CUtlBuffer::SEEK_HEAD, nGet );
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return imgres;
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}
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//-----------------------------------------------------------------------------
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// Converts from CMYK to RGB
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//-----------------------------------------------------------------------------
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static inline void CMYKToRGB( RGBA8888_t &color )
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{
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unsigned char nCyan = 255 - color.r;
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unsigned char nMagenta = 255 - color.g;
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unsigned char nYellow = 255 - color.b;
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unsigned char nBlack = 255 - color.a;
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int nCyanBlack = (int)nCyan + (int)nBlack;
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int nMagentaBlack = (int)nMagenta + (int)nBlack;
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int nYellowBlack = (int)nYellow + (int)nBlack;
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color.r = ( nCyanBlack < 255 ) ? 255 - nCyanBlack : 0;
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color.g = ( nMagentaBlack < 255 ) ? 255 - nMagentaBlack : 0;
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color.b = ( nYellowBlack < 255 ) ? 255 - nYellowBlack : 0;
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color.a = 255;
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}
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//-----------------------------------------------------------------------------
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// Deals with uncompressed channels
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//-----------------------------------------------------------------------------
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static void PSDConvertToRGBA8888( int nChannelsCount, PSDMode_t mode, PSDPalette_t &palette, Bitmap_t &bitmap )
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{
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bool bShouldFillInAlpha = false;
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unsigned char *pDest = bitmap.GetBits();
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switch( mode )
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{
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case MODE_RGBA:
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bShouldFillInAlpha = ( nChannelsCount == 3 );
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break;
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case MODE_PALETTIZED:
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{
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// Convert from palette
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bShouldFillInAlpha = ( nChannelsCount == 1 );
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for( int j=0; j < bitmap.Height(); ++j )
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{
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for ( int k = 0; k < bitmap.Width(); ++k, pDest += 4 )
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{
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unsigned char nPaletteIndex = pDest[0];
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pDest[0] = palette.m_pRed[nPaletteIndex];
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pDest[1] = palette.m_pGreen[nPaletteIndex];
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pDest[2] = palette.m_pBlue[nPaletteIndex];
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}
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}
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}
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break;
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case MODE_GREYSCALE:
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{
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// Monochrome
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bShouldFillInAlpha = ( nChannelsCount == 1 );
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for( int j=0; j < bitmap.Height(); ++j )
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{
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for ( int k = 0; k < bitmap.Width(); ++k, pDest += 4 )
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{
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pDest[1] = pDest[0];
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pDest[2] = pDest[0];
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}
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}
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}
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break;
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case MODE_CMYK:
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{
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// NOTE: The conversion will fill in alpha by default
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bShouldFillInAlpha = false;
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for( int j=0; j < bitmap.Height(); ++j )
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{
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for ( int k = 0; k < bitmap.Width(); ++k, pDest += 4 )
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{
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CMYKToRGB( *((RGBA8888_t*)pDest) );
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}
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}
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}
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break;
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}
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if ( bShouldFillInAlpha )
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{
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// No alpha channel, fill in white
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unsigned char *pDestAlpha = bitmap.GetBits();
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for( int j=0; j < bitmap.Height(); ++j )
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{
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for ( int k = 0; k < bitmap.Width(); ++k, pDestAlpha += 4 )
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{
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pDestAlpha[3] = 0xFF;
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}
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}
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}
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}
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//-----------------------------------------------------------------------------
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// Deals with uncompressed channels
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//-----------------------------------------------------------------------------
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static int s_pChannelIndex[MODE_COUNT+1][4] =
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{
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{ -1, -1, -1, -1 },
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{ 0, 3, -1, -1 }, // MODE_GREYSCALE
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{ 0, 3, -1, -1 }, // MODE_PALETTIZED
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{ 0, 1, 2, 3 }, // MODE_RGBA
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{ 0, 1, 2, 3 }, // MODE_CMYK
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{ -1, -1, -1, -1 },
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{ -1, -1, -1, -1 },
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{ -1, -1, -1, -1 }, // MODE_MULTICHANNEL
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{ -1, -1, -1, -1 },
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{ -1, -1, -1, -1 }, // MODE_LAB
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{ 3, -1, -1, -1 }, // Secret second pass mode for CMYK
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};
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static void PSDReadUncompressedChannels( CUtlBuffer &buf, int nChannelsCount, PSDMode_t mode, PSDPalette_t &palette, Bitmap_t &bitmap )
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{
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unsigned char *pChannelRow = (unsigned char*)_alloca( bitmap.Width() );
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for ( int i=0; i<nChannelsCount; ++i )
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{
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int nIndex = s_pChannelIndex[mode][i];
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Assert( nIndex != -1 );
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unsigned char *pDest = bitmap.GetBits();
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for( int j=0; j < bitmap.Height(); ++j )
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{
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buf.Get( pChannelRow, bitmap.Width() );
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// Collate the channels together
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for ( int k = 0; k < bitmap.Width(); ++k, pDest += 4 )
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{
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pDest[nIndex] = pChannelRow[k];
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}
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}
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}
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PSDConvertToRGBA8888( nChannelsCount, mode, palette, bitmap );
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}
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//-----------------------------------------------------------------------------
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// Deals with compressed channels
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//-----------------------------------------------------------------------------
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static void PSDReadCompressedChannels( CUtlBuffer &buf, int nChannelsCount, PSDMode_t mode, PSDPalette_t &palette, Bitmap_t &bitmap )
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{
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unsigned char *pChannelRow = (unsigned char*)_alloca( bitmap.Width() );
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for ( int i=0; i<nChannelsCount; ++i )
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{
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int nIndex = s_pChannelIndex[mode][i];
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Assert( nIndex != -1 );
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unsigned char *pDest = bitmap.GetBits();
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for( int j=0; j < bitmap.Height(); ++j )
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{
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unsigned char *pSrc = pChannelRow;
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unsigned int nPixelsRemaining = bitmap.Width();
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while ( nPixelsRemaining > 0 )
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{
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int nCount = buf.GetChar();
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if ( nCount >= 0 )
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{
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// If nCount is between 0 + 7F, it means copy the next nCount+1 bytes directly
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++nCount;
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Assert( (unsigned int)nCount <= nPixelsRemaining );
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buf.Get( pSrc, nCount );
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}
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else
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{
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// If nCount is between 80 and FF, it means replicate the next byte -Count+1 times
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nCount = -nCount + 1;
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Assert( (unsigned int)nCount <= nPixelsRemaining );
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unsigned char nPattern = buf.GetUnsignedChar();
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memset( pSrc, nPattern, nCount );
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}
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pSrc += nCount;
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nPixelsRemaining -= nCount;
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}
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Assert( nPixelsRemaining == 0 );
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// Collate the channels together
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for ( int k = 0; k < bitmap.Width(); ++k, pDest += 4 )
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{
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pDest[nIndex] = pChannelRow[k];
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}
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}
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}
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PSDConvertToRGBA8888( nChannelsCount, mode, palette, bitmap );
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}
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//-----------------------------------------------------------------------------
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// Reads the PSD file into the specified buffer
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//-----------------------------------------------------------------------------
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bool PSDReadFileRGBA8888( CUtlBuffer &buf, Bitmap_t &bitmap )
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{
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PSDHeader_t header;
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buf.Get( &header, sizeof(header) );
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if ( BigLong( header.m_nSignature ) != PSD_SIGNATURE )
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return false;
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if ( BigShort( header.m_nVersion ) != 1 )
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return false;
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if ( BigShort( header.m_nDepth ) != 8 )
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return false;
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PSDMode_t mode = (PSDMode_t)BigShort( header.m_nMode );
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int nChannelsCount = BigShort( header.m_nChannels );
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if ( mode == MODE_MULTICHANNEL || mode == MODE_LAB )
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return false;
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switch ( mode )
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{
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case MODE_RGBA:
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if ( nChannelsCount < 3 )
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return false;
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break;
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case MODE_GREYSCALE:
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case MODE_PALETTIZED:
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if ( nChannelsCount != 1 && nChannelsCount != 2 )
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return false;
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break;
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case MODE_CMYK:
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if ( nChannelsCount < 4 )
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return false;
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break;
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default:
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Warning( "Unsupported PSD color mode!\n" );
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return false;
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}
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int nWidth = BigLong( header.m_nColumns );
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int nHeight = BigLong( header.m_nRows );
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// Skip parts of memory we don't care about
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int nColorModeSize = BigLong( buf.GetUnsignedInt() );
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Assert( nColorModeSize % 3 == 0 );
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unsigned char *pPaletteBits = (unsigned char*)_alloca( nColorModeSize );
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PSDPalette_t palette;
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palette.m_pRed = palette.m_pGreen = palette.m_pBlue = 0;
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if ( nColorModeSize )
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{
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int nPaletteSize = nColorModeSize / 3;
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buf.Get( pPaletteBits, nColorModeSize );
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palette.m_pRed = pPaletteBits;
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palette.m_pGreen = palette.m_pRed + nPaletteSize;
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palette.m_pBlue = palette.m_pGreen + nPaletteSize;
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}
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int nImageResourcesSize = BigLong( buf.GetUnsignedInt() );
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buf.SeekGet( CUtlBuffer::SEEK_CURRENT, nImageResourcesSize );
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int nLayersSize = BigLong( buf.GetUnsignedInt() );
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buf.SeekGet( CUtlBuffer::SEEK_CURRENT, nLayersSize );
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unsigned short nCompressionType = BigShort( buf.GetShort() );
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bitmap.Init( nWidth, nHeight, IMAGE_FORMAT_RGBA8888 );
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bool bSecondPassCMYKA = ( nChannelsCount > 4 && mode == MODE_CMYK );
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if ( nCompressionType == 0 )
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{
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PSDReadUncompressedChannels( buf, ( nChannelsCount > 4 ) ? 4 : nChannelsCount, mode, palette, bitmap );
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}
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else
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{
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// Skip the data that indicates the length of each compressed row in bytes
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// NOTE: There are two bytes per row per channel
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unsigned int nLineLengthData = sizeof(unsigned short) * bitmap.Height() * nChannelsCount;
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buf.SeekGet( CUtlBuffer::SEEK_CURRENT, nLineLengthData );
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PSDReadCompressedChannels( buf, ( nChannelsCount > 4 ) ? 4 : nChannelsCount, mode, palette, bitmap );
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}
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// Read the alpha in a second pass for CMYKA
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if ( bSecondPassCMYKA )
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{
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if ( nCompressionType == 0 )
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{
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PSDReadUncompressedChannels( buf, 1, MODE_COUNT, palette, bitmap );
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}
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else
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{
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PSDReadCompressedChannels( buf, 1, MODE_COUNT, palette, bitmap );
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}
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}
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return true;
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}
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//-----------------------------------------------------------------------------
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// Loads the heightfield from a file
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//-----------------------------------------------------------------------------
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bool PSDReadFileRGBA8888( const char *pFileName, const char *pPathID, Bitmap_t &bitmap )
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{
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CUtlStreamBuffer buf( pFileName, pPathID, CUtlBuffer::READ_ONLY );
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if ( !g_pFullFileSystem->ReadFile( pFileName, pPathID, buf, sizeof(PSDHeader_t) ) )
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{
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Warning( "Unable to read file %s\n", pFileName );
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return false;
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}
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return PSDReadFileRGBA8888( buf, bitmap );
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}
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//////////////////////////////////////////////////////////////////////////
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//
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// PSD Helper structs implementation
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//
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//////////////////////////////////////////////////////////////////////////
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PSDImageResources::ResElement PSDImageResources::FindElement( Resource eType ) const
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{
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ResElement res;
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memset( &res, 0, sizeof( res ) );
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unsigned char const *pvBuffer = m_pvBuffer, * const pvBufferEnd = m_pvBuffer + m_numBytes;
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while ( pvBuffer < pvBufferEnd )
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{
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// 4 : signature
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// 2 : type
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// 4 : reserved
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// 2 : length
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// bytes[ length ]
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unsigned long uSignature = BigLong( *( unsigned long * )( pvBuffer ) );
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pvBuffer += 4;
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if ( uSignature != PSD_IMGRES_SIGNATURE )
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break;
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unsigned short uType = BigShort( *( unsigned short * )( pvBuffer ) );
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pvBuffer += 6;
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unsigned short uLength = BigShort( *( unsigned short * )( pvBuffer ) );
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pvBuffer += 2;
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if ( uType == eType )
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{
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res.m_eType = eType;
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res.m_numBytes = uLength;
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res.m_pvData = pvBuffer;
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
pvBuffer += ( ( uLength + 1 ) &~1 );
|
|
}
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
PSDResFileInfo::ResFileInfoElement PSDResFileInfo::FindElement( ResFileInfo eType ) const
|
|
{
|
|
ResFileInfoElement res;
|
|
memset( &res, 0, sizeof( res ) );
|
|
|
|
unsigned char const *pvBuffer = m_res.m_pvData, * const pvBufferEnd = pvBuffer + m_res.m_numBytes;
|
|
while ( pvBuffer < pvBufferEnd )
|
|
{
|
|
// 2 : = 0x1C02
|
|
// 1 : type
|
|
// 2 : length
|
|
// bytes[ length ]
|
|
|
|
unsigned short uResLabel = BigShort( *( unsigned short * )( pvBuffer ) );
|
|
pvBuffer += 2;
|
|
|
|
unsigned char uType = *pvBuffer;
|
|
pvBuffer += 1;
|
|
|
|
unsigned short uLength = BigShort( *( unsigned short * )( pvBuffer ) );
|
|
pvBuffer += 2;
|
|
|
|
if ( uType == eType && uResLabel == 0x1C02 )
|
|
{
|
|
res.m_eType = eType;
|
|
res.m_numBytes = uLength;
|
|
res.m_pvData = pvBuffer;
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
pvBuffer += uLength;
|
|
}
|
|
}
|
|
|
|
return res;
|
|
}
|