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535 lines
11 KiB
535 lines
11 KiB
/* This file is part of the KDE project
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Copyright (C) 2002-2005 Nadeem Hasan <nhasan@kde.org>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License (LGPL) as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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*/
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#include "pcx.h"
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#include <qimage.h>
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#include <kdebug.h>
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static QDataStream &operator>>( QDataStream &s, RGB &rgb )
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{
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s >> rgb.r >> rgb.g >> rgb.b;
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return s;
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}
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static QDataStream &operator>>( QDataStream &s, Palette &pal )
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{
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for ( int i=0; i<16; ++i )
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s >> pal.rgb[ i ];
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return s;
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}
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static QDataStream &operator>>( QDataStream &s, PCXHEADER &ph )
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{
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s >> ph.Manufacturer;
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s >> ph.Version;
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s >> ph.Encoding;
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s >> ph.Bpp;
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s >> ph.XMin >> ph.YMin >> ph.XMax >> ph.YMax;
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s >> ph.HDpi >> ph.YDpi;
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s >> ph.ColorMap;
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s >> ph.Reserved;
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s >> ph.NPlanes;
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s >> ph.BytesPerLine;
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s >> ph.PaletteInfo;
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s >> ph.HScreenSize;
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s >> ph.VScreenSize;
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// Skip the rest of the header
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Q_UINT8 byte;
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while ( s.device()->at() < 128 )
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s >> byte;
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return s;
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}
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static QDataStream &operator<<( QDataStream &s, const RGB &rgb )
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{
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s << rgb.r << rgb.g << rgb.b;
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return s;
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}
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static QDataStream &operator<<( QDataStream &s, const Palette &pal )
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{
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for ( int i=0; i<16; ++i )
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s << pal.rgb[ i ];
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return s;
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}
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static QDataStream &operator<<( QDataStream &s, const PCXHEADER &ph )
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{
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s << ph.Manufacturer;
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s << ph.Version;
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s << ph.Encoding;
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s << ph.Bpp;
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s << ph.XMin << ph.YMin << ph.XMax << ph.YMax;
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s << ph.HDpi << ph.YDpi;
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s << ph.ColorMap;
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s << ph.Reserved;
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s << ph.NPlanes;
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s << ph.BytesPerLine;
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s << ph.PaletteInfo;
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s << ph.HScreenSize;
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s << ph.VScreenSize;
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Q_UINT8 byte = 0;
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for ( int i=0; i<54; ++i )
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s << byte;
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return s;
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}
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PCXHEADER::PCXHEADER()
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{
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// Initialize all data to zero
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QByteArray dummy( 128 );
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dummy.fill( 0 );
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QDataStream s( dummy, IO_ReadOnly );
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s >> *this;
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}
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static void readLine( QDataStream &s, QByteArray &buf, const PCXHEADER &header )
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{
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Q_UINT32 i=0;
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Q_UINT32 size = buf.size();
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Q_UINT8 byte, count;
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if ( header.isCompressed() )
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{
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// Uncompress the image data
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while ( i < size )
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{
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count = 1;
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s >> byte;
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if ( byte > 0xc0 )
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{
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count = byte - 0xc0;
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s >> byte;
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}
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while ( count-- && i < size )
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buf[ i++ ] = byte;
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}
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}
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else
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{
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// Image is not compressed (possible?)
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while ( i < size )
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{
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s >> byte;
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buf[ i++ ] = byte;
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}
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}
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}
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static void readImage1( QImage &img, QDataStream &s, const PCXHEADER &header )
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{
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QByteArray buf( header.BytesPerLine );
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if(!img.create( header.width(), header.height(), 1, 2, QImage::BigEndian ))
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return;
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for ( int y=0; y<header.height(); ++y )
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{
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if ( s.atEnd() )
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{
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img.reset();
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return;
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}
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readLine( s, buf, header );
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uchar *p = img.scanLine( y );
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unsigned int bpl = QMIN((header.width()+7)/8, header.BytesPerLine);
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for ( unsigned int x=0; x< bpl; ++x )
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p[ x ] = buf[x];
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}
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// Set the color palette
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img.setColor( 0, qRgb( 0, 0, 0 ) );
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img.setColor( 1, qRgb( 255, 255, 255 ) );
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}
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static void readImage4( QImage &img, QDataStream &s, const PCXHEADER &header )
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{
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QByteArray buf( header.BytesPerLine*4 );
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QByteArray pixbuf( header.width() );
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if(!img.create( header.width(), header.height(), 8, 16 ))
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return;
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for ( int y=0; y<header.height(); ++y )
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{
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if ( s.atEnd() )
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{
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img.reset();
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return;
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}
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pixbuf.fill( 0 );
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readLine( s, buf, header );
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for ( int i=0; i<4; i++ )
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{
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Q_UINT32 offset = i*header.BytesPerLine;
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for ( unsigned int x=0; x<header.width(); ++x )
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if ( buf[ offset + ( x/8 ) ] & ( 128 >> ( x%8 ) ) )
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pixbuf[ x ] += ( 1 << i );
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}
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uchar *p = img.scanLine( y );
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for ( unsigned int x=0; x<header.width(); ++x )
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p[ x ] = pixbuf[ x ];
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}
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// Read the palette
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for ( int i=0; i<16; ++i )
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img.setColor( i, header.ColorMap.color( i ) );
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}
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static void readImage8( QImage &img, QDataStream &s, const PCXHEADER &header )
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{
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QByteArray buf( header.BytesPerLine );
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if(!img.create( header.width(), header.height(), 8, 256 ))
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return;
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for ( int y=0; y<header.height(); ++y )
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{
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if ( s.atEnd() )
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{
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img.reset();
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return;
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}
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readLine( s, buf, header );
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uchar *p = img.scanLine( y );
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unsigned int bpl = QMIN(header.BytesPerLine, header.width());
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for ( unsigned int x=0; x<bpl; ++x )
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p[ x ] = buf[ x ];
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}
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Q_UINT8 flag;
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s >> flag;
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kdDebug( 399 ) << "Palette Flag: " << flag << endl;
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if ( flag == 12 && ( header.Version == 5 || header.Version == 2 ) )
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{
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// Read the palette
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Q_UINT8 r, g, b;
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for ( int i=0; i<256; ++i )
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{
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s >> r >> g >> b;
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img.setColor( i, qRgb( r, g, b ) );
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}
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}
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}
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static void readImage24( QImage &img, QDataStream &s, const PCXHEADER &header )
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{
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QByteArray r_buf( header.BytesPerLine );
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QByteArray g_buf( header.BytesPerLine );
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QByteArray b_buf( header.BytesPerLine );
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if(!img.create( header.width(), header.height(), 32 ))
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return;
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for ( int y=0; y<header.height(); ++y )
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{
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if ( s.atEnd() )
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{
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img.reset();
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return;
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}
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readLine( s, r_buf, header );
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readLine( s, g_buf, header );
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readLine( s, b_buf, header );
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uint *p = ( uint * )img.scanLine( y );
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for ( unsigned int x=0; x<header.width(); ++x )
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p[ x ] = qRgb( r_buf[ x ], g_buf[ x ], b_buf[ x ] );
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}
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}
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KDE_EXPORT void kimgio_pcx_read( QImageIO *io )
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{
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QDataStream s( io->ioDevice() );
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s.setByteOrder( QDataStream::LittleEndian );
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if ( s.device()->size() < 128 )
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{
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io->setStatus( -1 );
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return;
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}
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PCXHEADER header;
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s >> header;
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if ( header.Manufacturer != 10 || s.atEnd())
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{
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io->setStatus( -1 );
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return;
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}
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int w = header.width();
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int h = header.height();
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kdDebug( 399 ) << "Manufacturer: " << header.Manufacturer << endl;
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kdDebug( 399 ) << "Version: " << header.Version << endl;
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kdDebug( 399 ) << "Encoding: " << header.Encoding << endl;
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kdDebug( 399 ) << "Bpp: " << header.Bpp << endl;
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kdDebug( 399 ) << "Width: " << w << endl;
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kdDebug( 399 ) << "Height: " << h << endl;
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kdDebug( 399 ) << "Window: " << header.XMin << "," << header.XMax << ","
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<< header.YMin << "," << header.YMax << endl;
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kdDebug( 399 ) << "BytesPerLine: " << header.BytesPerLine << endl;
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kdDebug( 399 ) << "NPlanes: " << header.NPlanes << endl;
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QImage img;
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if ( header.Bpp == 1 && header.NPlanes == 1 )
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{
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readImage1( img, s, header );
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}
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else if ( header.Bpp == 1 && header.NPlanes == 4 )
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{
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readImage4( img, s, header );
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}
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else if ( header.Bpp == 8 && header.NPlanes == 1 )
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{
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readImage8( img, s, header );
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}
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else if ( header.Bpp == 8 && header.NPlanes == 3 )
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{
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readImage24( img, s, header );
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}
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kdDebug( 399 ) << "Image Bytes: " << img.numBytes() << endl;
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kdDebug( 399 ) << "Image Bytes Per Line: " << img.bytesPerLine() << endl;
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kdDebug( 399 ) << "Image Depth: " << img.depth() << endl;
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if ( !img.isNull() )
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{
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io->setImage( img );
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io->setStatus( 0 );
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}
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else
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{
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io->setStatus( -1 );
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}
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}
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static void writeLine( QDataStream &s, QByteArray &buf )
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{
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Q_UINT32 i = 0;
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Q_UINT32 size = buf.size();
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Q_UINT8 count, data;
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char byte;
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while ( i < size )
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{
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count = 1;
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byte = buf[ i++ ];
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while ( ( i < size ) && ( byte == buf[ i ] ) && ( count < 63 ) )
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{
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++i;
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++count;
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}
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data = byte;
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if ( count > 1 || data >= 0xc0 )
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{
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count |= 0xc0;
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s << count;
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}
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s << data;
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}
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}
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static void writeImage1( QImage &img, QDataStream &s, PCXHEADER &header )
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{
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img = img.convertBitOrder( QImage::BigEndian );
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header.Bpp = 1;
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header.NPlanes = 1;
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header.BytesPerLine = img.bytesPerLine();
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s << header;
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QByteArray buf( header.BytesPerLine );
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for ( int y=0; y<header.height(); ++y )
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{
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Q_UINT8 *p = img.scanLine( y );
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// Invert as QImage uses reverse palette for monochrome images?
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for ( int i=0; i<header.BytesPerLine; ++i )
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buf[ i ] = ~p[ i ];
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writeLine( s, buf );
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}
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}
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static void writeImage4( QImage &img, QDataStream &s, PCXHEADER &header )
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{
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header.Bpp = 1;
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header.NPlanes = 4;
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header.BytesPerLine = header.width()/8;
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for ( int i=0; i<16; ++i )
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header.ColorMap.setColor( i, img.color( i ) );
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s << header;
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QByteArray buf[ 4 ];
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for ( int i=0; i<4; ++i )
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buf[ i ].resize( header.BytesPerLine );
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for ( int y=0; y<header.height(); ++y )
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{
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Q_UINT8 *p = img.scanLine( y );
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for ( int i=0; i<4; ++i )
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buf[ i ].fill( 0 );
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for ( unsigned int x=0; x<header.width(); ++x )
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{
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for ( int i=0; i<4; ++i )
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if ( *( p+x ) & ( 1 << i ) )
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buf[ i ][ x/8 ] |= 1 << ( 7-x%8 );
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}
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for ( int i=0; i<4; ++i )
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writeLine( s, buf[ i ] );
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}
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}
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static void writeImage8( QImage &img, QDataStream &s, PCXHEADER &header )
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{
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header.Bpp = 8;
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header.NPlanes = 1;
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header.BytesPerLine = img.bytesPerLine();
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s << header;
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QByteArray buf( header.BytesPerLine );
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for ( int y=0; y<header.height(); ++y )
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{
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Q_UINT8 *p = img.scanLine( y );
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for ( int i=0; i<header.BytesPerLine; ++i )
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buf[ i ] = p[ i ];
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writeLine( s, buf );
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}
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// Write palette flag
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Q_UINT8 byte = 12;
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s << byte;
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// Write palette
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for ( int i=0; i<256; ++i )
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s << RGB( img.color( i ) );
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}
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static void writeImage24( QImage &img, QDataStream &s, PCXHEADER &header )
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{
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header.Bpp = 8;
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header.NPlanes = 3;
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header.BytesPerLine = header.width();
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s << header;
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QByteArray r_buf( header.width() );
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QByteArray g_buf( header.width() );
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QByteArray b_buf( header.width() );
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for ( int y=0; y<header.height(); ++y )
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{
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uint *p = ( uint * )img.scanLine( y );
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for ( unsigned int x=0; x<header.width(); ++x )
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{
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QRgb rgb = *p++;
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r_buf[ x ] = qRed( rgb );
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g_buf[ x ] = qGreen( rgb );
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b_buf[ x ] = qBlue( rgb );
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}
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writeLine( s, r_buf );
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writeLine( s, g_buf );
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writeLine( s, b_buf );
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}
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}
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KDE_EXPORT void kimgio_pcx_write( QImageIO *io )
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{
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QDataStream s( io->ioDevice() );
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s.setByteOrder( QDataStream::LittleEndian );
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QImage img = io->image();
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int w = img.width();
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int h = img.height();
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kdDebug( 399 ) << "Width: " << w << endl;
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kdDebug( 399 ) << "Height: " << h << endl;
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kdDebug( 399 ) << "Depth: " << img.depth() << endl;
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kdDebug( 399 ) << "BytesPerLine: " << img.bytesPerLine() << endl;
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kdDebug( 399 ) << "Num Colors: " << img.numColors() << endl;
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PCXHEADER header;
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header.Manufacturer = 10;
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header.Version = 5;
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header.Encoding = 1;
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header.XMin = 0;
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header.YMin = 0;
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header.XMax = w-1;
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header.YMax = h-1;
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header.HDpi = 300;
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header.YDpi = 300;
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header.Reserved = 0;
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header.PaletteInfo =1;
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if ( img.depth() == 1 )
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{
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writeImage1( img, s, header );
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}
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else if ( img.depth() == 8 && img.numColors() <= 16 )
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{
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writeImage4( img, s, header );
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}
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else if ( img.depth() == 8 )
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{
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writeImage8( img, s, header );
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}
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else if ( img.depth() == 32 )
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{
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writeImage24( img, s, header );
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}
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io->setStatus( 0 );
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}
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/* vim: et sw=2 ts=2
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*/
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