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165 lines
4.2 KiB
165 lines
4.2 KiB
13 years ago
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/*
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* Copyright (c) 2005-2006 Cyrille Berger <cberger@cberger.net>
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*
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* This program 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 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include "kis_tiff_stream.h"
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TIFFStreamContigBase::TIFFStreamContigBase( uint8* src, uint16 depth, uint32 lineSize ) : TIFFStreamBase(depth), m_src(src), m_lineSize(lineSize) { restart(); }
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void TIFFStreamContigBase::restart()
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{
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m_srcit = m_src;
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m_posinc = 8;
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}
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void TIFFStreamContigBase::moveToLine(uint32 lineNumber)
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{
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m_srcit = m_src + lineNumber * m_lineSize;
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m_posinc = 8;
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}
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uint32 TIFFStreamContigBelow16::nextValue()
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{
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register uint8 remain;
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register uint32 value;
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remain = m_depth;
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value = 0;
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while (remain > 0)
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{
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register uint8 toread;
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toread = remain;
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if (toread > m_posinc) toread = m_posinc;
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remain -= toread;
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m_posinc -= toread;
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value = (value << toread) | (( (*m_srcit) >> (m_posinc) ) & ( ( 1 << toread ) - 1 ) );
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if (m_posinc == 0)
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{
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m_srcit++;
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m_posinc=8;
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}
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}
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return value;
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}
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uint32 TIFFStreamContigBelow32::nextValue()
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{
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register uint8 remain;
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register uint32 value;
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remain = m_depth;
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value = 0;
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while (remain > 0)
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{
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register uint8 toread;
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toread = remain;
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if (toread > m_posinc) toread = m_posinc;
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remain -= toread;
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m_posinc -= toread;
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value = (value) | ( (( (*m_srcit) >> (m_posinc) ) & ( ( 1 << toread ) - 1 ) ) << ( m_depth - 8 - remain ) );
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if (m_posinc == 0)
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{
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m_srcit++;
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m_posinc=8;
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}
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}
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return value;
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}
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uint32 TIFFStreamContigAbove32::nextValue()
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{
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register uint8 remain;
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register uint32 value;
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remain = m_depth;
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value = 0;
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while (remain > 0)
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{
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register uint8 toread;
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toread = remain;
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if (toread > m_posinc) toread = m_posinc;
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remain -= toread;
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m_posinc -= toread;
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if(remain < 32 )
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{
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value = (value) | ( (( (*m_srcit) >> (m_posinc) ) & ( ( 1 << toread ) - 1 ) ) << ( 24 - remain ) );
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}
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if (m_posinc == 0)
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{
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m_srcit++;
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m_posinc=8;
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}
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}
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return value;
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}
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TIFFStreamSeperate::TIFFStreamSeperate( uint8** srcs, uint8 nb_samples ,uint16 depth, uint32* lineSize) : TIFFStreamBase(depth), m_nb_samples(nb_samples)
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{
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streams = new TIFFStreamContigBase*[nb_samples];
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if(depth < 16)
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{
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for(uint8 i = 0; i < m_nb_samples; i++)
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{
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streams[i] = new TIFFStreamContigBelow16(srcs[i], depth, lineSize[i]);
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}
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} else if( depth < 32 )
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{
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for(uint8 i = 0; i < m_nb_samples; i++)
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{
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streams[i] = new TIFFStreamContigBelow32(srcs[i], depth, lineSize[i]);
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}
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} else {
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for(uint8 i = 0; i < m_nb_samples; i++)
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{
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streams[i] = new TIFFStreamContigAbove32(srcs[i], depth, lineSize[i]);
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}
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}
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restart();
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}
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TIFFStreamSeperate::~TIFFStreamSeperate()
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{
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for(uint8 i = 0; i < m_nb_samples; i++)
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{
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delete streams[i];
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}
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delete[] streams;
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}
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uint32 TIFFStreamSeperate::nextValue()
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{
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uint32 value = streams[ m_current_sample ]->nextValue();
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if( (++m_current_sample) >= m_nb_samples)
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m_current_sample = 0;
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return value;
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}
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void TIFFStreamSeperate::restart()
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{
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m_current_sample = 0;
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for(uint8 i = 0; i < m_nb_samples; i++)
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{
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streams[i]->restart();
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}
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}
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void TIFFStreamSeperate::moveToLine(uint32 lineNumber)
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{
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for(uint8 i = 0; i < m_nb_samples; i++)
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{
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streams[i]->moveToLine(lineNumber);
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}
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}
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