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sane-project-backends/backend/u12-tpa.c

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/* @file u12-pp_tpa.c
* @brief Here we find some adjustments according to the scan source.
*
* based on sources acquired from Plustek Inc.
* Copyright (C) 2003-2004 Gerhard Jaeger <gerhard@gjaeger.de>
*
* History:
* - 0.01 - initial version
* - 0.02 - cleanup
* .
* <hr>
* This file is part of the SANE package.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA.
*
* As a special exception, the authors of SANE give permission for
* additional uses of the libraries contained in this release of SANE.
*
* The exception is that, if you link a SANE library with other files
* to produce an executable, this does not by itself cause the
* resulting executable to be covered by the GNU General Public
* License. Your use of that executable is in no way restricted on
* account of linking the SANE library code into it.
*
* This exception does not, however, invalidate any other reasons why
* the executable file might be covered by the GNU General Public
* License.
*
* If you submit changes to SANE to the maintainers to be included in
* a subsequent release, you agree by submitting the changes that
* those changes may be distributed with this exception intact.
*
* If you write modifications of your own for SANE, it is your choice
* whether to permit this exception to apply to your modifications.
* If you do not wish that, delete this exception notice.
* <hr>
*/
/** this function does some reshading, when scanning negatives on an ASIC 98003
* based scanner
*/
static void u12tpa_Reshading( U12_Device *dev )
{
SANE_Byte bHi[3], bHiLeft[3], bHiRight[3];
u_long i, dwR, dwG, dwB, dwSum;
u_long dwIndex, dwIndexRight, dwIndexLeft;
DataPointer RedPtr, GreenPtr, BluePtr;
TimerDef timer;
DBG( _DBG_INFO, "u12tpa_Reshading()\n" );
bHi[0] = bHi[1] = bHi[2] = 0;
dev->scan.negScan[1].exposureTime = 144;
dev->scan.negScan[1].xStepTime = 18;
dev->scan.negScan[2].exposureTime = 144;
dev->scan.negScan[2].xStepTime = 36;
dev->scan.negScan[3].exposureTime = 144;
dev->scan.negScan[3].xStepTime = 72;
dev->scan.negScan[4].exposureTime = 144;
dev->scan.negScan[4].xStepTime = 144;
dev->shade.wExposure = dev->scan.negScan[dev->scan.dpiIdx].exposureTime;
dev->shade.wXStep = dev->scan.negScan[dev->scan.dpiIdx].xStepTime;
u12io_StartTimer( &timer, _SECOND );
u12io_ResetFifoLen();
while(!(u12io_GetScanState( dev ) & _SCANSTATE_STOP) &&
(!u12io_CheckTimer(&timer)));
u12io_DataToRegister( dev, REG_XSTEPTIME,
(SANE_Byte)(dev->regs.RD_LineControl >> 4));
_DODELAY( 12 );
u12motor_PositionYProc( dev, _NEG_SHADING_OFFS );
u12io_DataToRegister( dev, REG_XSTEPTIME, dev->regs.RD_XStepTime );
dev->regs.RD_ScanControl = _SCAN_BYTEMODE;
u12hw_SelectLampSource( dev );
u12io_DataToRegister( dev, REG_LINECONTROL, _LOBYTE(dev->shade.wExposure));
u12io_DataToRegister( dev, REG_XSTEPTIME, _LOBYTE(dev->shade.wXStep));
dev->regs.RD_LineControl = _LOBYTE(dev->shade.wExposure);
dev->regs.RD_ExtLineControl = _HIBYTE(dev->shade.wExposure);
dev->regs.RD_XStepTime = (SANE_Byte)(dev->shade.wExposure);
dev->regs.RD_ModeControl = _ModeScan;
dev->regs.RD_Motor0Control = _FORWARD_MOTOR;
dev->regs.RD_Origin = (u_short)dev->scan.negBegin;
dev->regs.RD_Pixels = _NEG_PAGEWIDTH600;
memset( dev->scanStates, 0, _SCANSTATE_BYTES );
/* put 9 scan states to make sure there are 8 lines available at least */
for( i = 0; i <= 12; i++)
dev->scanStates[i] = 0x8f;
u12io_PutOnAllRegisters( dev );
_DODELAY( 70 );
/* prepare the buffers... */
memset( dev->bufs.TpaBuf.pb, 0, _SIZE_TPA_DATA_BUF );
RedPtr.pb = dev->bufs.b1.pShadingMap;
GreenPtr.pb = RedPtr.pb + _NEG_PAGEWIDTH600;
BluePtr.pb = GreenPtr.pb + _NEG_PAGEWIDTH600;
for( dwSum = 8; dwSum--; ) {
u12io_ReadOneShadingLine( dev, dev->bufs.b1.pShadingMap, _NEG_PAGEWIDTH600 );
for( i = 0; i < _NEG_PAGEWIDTH600; i++) {
dev->bufs.TpaBuf.pusrgb[i].Red += RedPtr.pb[i];
dev->bufs.TpaBuf.pusrgb[i].Green += GreenPtr.pb[i];
dev->bufs.TpaBuf.pusrgb[i].Blue += BluePtr.pb[i];
}
}
for( i = 0; i < (_NEG_PAGEWIDTH600 * 3UL); i++ )
dev->bufs.TpaBuf.pb[i] = dev->bufs.TpaBuf.pw[i] >> 3;
RedPtr.pb = dev->bufs.TpaBuf.pb;
/* Convert RGB to gray scale (Brightness), and average 16 pixels */
for( bHiRight[1] = 0, i = dwIndexRight = 0;
i < _NEG_PAGEWIDTH600 / 2; i += 16 ) {
bHiRight [0] =
(SANE_Byte)(((((u_long) RedPtr.pbrgb [i].Red +
(u_long) RedPtr.pbrgb[i + 1].Red +
(u_long) RedPtr.pbrgb[i + 2].Red +
(u_long) RedPtr.pbrgb[i + 3].Red +
(u_long) RedPtr.pbrgb[i + 4].Red +
(u_long) RedPtr.pbrgb[i + 5].Red +
(u_long) RedPtr.pbrgb[i + 6].Red +
(u_long) RedPtr.pbrgb[i + 7].Red +
(u_long) RedPtr.pbrgb[i + 8].Red +
(u_long) RedPtr.pbrgb[i + 9].Red +
(u_long) RedPtr.pbrgb[i + 10].Red +
(u_long) RedPtr.pbrgb[i + 11].Red +
(u_long) RedPtr.pbrgb[i + 12].Red +
(u_long) RedPtr.pbrgb[i + 13].Red +
(u_long) RedPtr.pbrgb[i + 14].Red +
(u_long) RedPtr.pbrgb[i + 15].Red) >> 4) * 30UL +
(((u_long) RedPtr.pbrgb[i].Green +
(u_long) RedPtr.pbrgb[i + 1].Green +
(u_long) RedPtr.pbrgb[i + 2].Green +
(u_long) RedPtr.pbrgb[i + 3].Green +
(u_long) RedPtr.pbrgb[i + 4].Green +
(u_long) RedPtr.pbrgb[i + 5].Green +
(u_long) RedPtr.pbrgb[i + 6].Green +
(u_long) RedPtr.pbrgb[i + 7].Green +
(u_long) RedPtr.pbrgb[i + 8].Green +
(u_long) RedPtr.pbrgb[i + 9].Green +
(u_long) RedPtr.pbrgb[i + 10].Green +
(u_long) RedPtr.pbrgb[i + 11].Green +
(u_long) RedPtr.pbrgb[i + 12].Green +
(u_long) RedPtr.pbrgb[i + 13].Green +
(u_long) RedPtr.pbrgb[i + 14].Green +
(u_long) RedPtr.pbrgb[i + 15].Green) >> 4) * 59UL +
(((u_long) RedPtr.pbrgb[i].Blue +
(u_long) RedPtr.pbrgb[i + 1].Blue +
(u_long) RedPtr.pbrgb[i + 2].Blue +
(u_long) RedPtr.pbrgb[i + 3].Blue +
(u_long) RedPtr.pbrgb[i + 4].Blue +
(u_long) RedPtr.pbrgb[i + 5].Blue +
(u_long) RedPtr.pbrgb[i + 6].Blue +
(u_long) RedPtr.pbrgb[i + 7].Blue +
(u_long) RedPtr.pbrgb[i + 8].Blue +
(u_long) RedPtr.pbrgb[i + 9].Blue +
(u_long) RedPtr.pbrgb[i + 10].Blue +
(u_long) RedPtr.pbrgb[i + 11].Blue +
(u_long) RedPtr.pbrgb[i + 12].Blue +
(u_long) RedPtr.pbrgb[i + 13].Blue +
(u_long) RedPtr.pbrgb[i + 14].Blue +
(u_long) RedPtr.pbrgb[i + 15].Blue) >> 4) * 11UL) / 100UL);
if( bHiRight[1] < bHiRight[0] ) {
bHiRight[1] = bHiRight[0];
dwIndexRight = i;
}
}
/* Convert RGB to gray scale (Brightness), and average 16 pixels */
for( bHiLeft[1] = 0, i = dwIndexLeft = _NEG_PAGEWIDTH / 2;
i < _NEG_PAGEWIDTH600; i += 16 ) {
bHiLeft [0] =
(SANE_Byte)(((((u_long) RedPtr.pbrgb[i].Red +
(u_long) RedPtr.pbrgb[i + 1].Red +
(u_long) RedPtr.pbrgb[i + 2].Red +
(u_long) RedPtr.pbrgb[i + 3].Red +
(u_long) RedPtr.pbrgb[i + 4].Red +
(u_long) RedPtr.pbrgb[i + 5].Red +
(u_long) RedPtr.pbrgb[i + 6].Red +
(u_long) RedPtr.pbrgb[i + 7].Red +
(u_long) RedPtr.pbrgb[i + 8].Red +
(u_long) RedPtr.pbrgb[i + 9].Red +
(u_long) RedPtr.pbrgb[i + 10].Red +
(u_long) RedPtr.pbrgb[i + 11].Red +
(u_long) RedPtr.pbrgb[i + 12].Red +
(u_long) RedPtr.pbrgb[i + 13].Red +
(u_long) RedPtr.pbrgb[i + 14].Red +
(u_long) RedPtr.pbrgb[i + 15].Red) >> 4) * 30UL +
(((u_long) RedPtr.pbrgb[i].Green +
(u_long) RedPtr.pbrgb[i + 1].Green +
(u_long) RedPtr.pbrgb[i + 2].Green +
(u_long) RedPtr.pbrgb[i + 3].Green +
(u_long) RedPtr.pbrgb[i + 4].Green +
(u_long) RedPtr.pbrgb[i + 5].Green +
(u_long) RedPtr.pbrgb[i + 6].Green +
(u_long) RedPtr.pbrgb[i + 7].Green +
(u_long) RedPtr.pbrgb[i + 8].Green +
(u_long) RedPtr.pbrgb[i + 9].Green +
(u_long) RedPtr.pbrgb[i + 10].Green +
(u_long) RedPtr.pbrgb[i + 11].Green +
(u_long) RedPtr.pbrgb[i + 12].Green +
(u_long) RedPtr.pbrgb[i + 13].Green +
(u_long) RedPtr.pbrgb[i + 14].Green +
(u_long) RedPtr.pbrgb[i + 15].Green) >> 4) * 59UL +
(((u_long) RedPtr.pbrgb[i].Blue +
(u_long) RedPtr.pbrgb[i + 1].Blue +
(u_long) RedPtr.pbrgb[i + 2].Blue +
(u_long) RedPtr.pbrgb[i + 3].Blue +
(u_long) RedPtr.pbrgb[i + 4].Blue +
(u_long) RedPtr.pbrgb[i + 5].Blue +
(u_long) RedPtr.pbrgb[i + 6].Blue +
(u_long) RedPtr.pbrgb[i + 7].Blue +
(u_long) RedPtr.pbrgb[i + 8].Blue +
(u_long) RedPtr.pbrgb[i + 9].Blue +
(u_long) RedPtr.pbrgb[i + 10].Blue +
(u_long) RedPtr.pbrgb[i + 11].Blue +
(u_long) RedPtr.pbrgb[i + 12].Blue +
(u_long) RedPtr.pbrgb[i + 13].Blue +
(u_long) RedPtr.pbrgb[i + 14].Blue +
(u_long) RedPtr.pbrgb[i + 15].Blue) >> 4) * 11UL) / 100UL);
if( bHiLeft[1] < bHiLeft[0] ) {
bHiLeft[1] = bHiLeft[0];
dwIndexLeft = i;
}
}
if((bHiLeft[1] < 200) && (bHiRight[1] < 200)) {
if( bHiLeft[1] < bHiRight[1] )
dwIndex = dwIndexRight;
else
dwIndex = dwIndexLeft;
} else {
if( bHiLeft[1] > 200 )
dwIndex = dwIndexRight;
else
dwIndex = dwIndexLeft;
}
/* Get the hilight */
RedPtr.pusrgb = dev->bufs.b2.pSumRGB + dwIndex +
dev->regs.RD_Origin + _SHADING_BEGINX;
for( dwR = dwG = dwB = 0, i = 16; i--; RedPtr.pusrgb++ ) {
dwR += RedPtr.pusrgb->Red;
dwG += RedPtr.pusrgb->Green;
dwB += RedPtr.pusrgb->Blue;
}
dwR >>= 8;
dwG >>= 8;
dwB >>= 8;
if( dwR > dwG && dwR > dwB )
dev->shade.bGainHigh = (SANE_Byte)dwR; /* >> 4 for average, >> 4 to 8-bit */
else {
if( dwG > dwR && dwG > dwB )
dev->shade.bGainHigh = (SANE_Byte)dwG;
else
dev->shade.bGainHigh = (SANE_Byte)dwB;
}
dev->shade.bGainHigh = (SANE_Byte)(dev->shade.bGainHigh - 0x18);
dev->shade.bGainLow = (SANE_Byte)(dev->shade.bGainHigh - 0x10);
/* Reshading to get the new gain */
dev->shade.Hilight.Colors.Red = 0;
dev->shade.Hilight.Colors.Green = 0;
dev->shade.Hilight.Colors.Blue = 0;
dev->shade.Gain.Colors.Red++;
dev->shade.Gain.Colors.Green++;
dev->shade.Gain.Colors.Blue++;
dev->shade.fStop = SANE_FALSE;
RedPtr.pb = dev->bufs.b1.pShadingMap + dwIndex;
GreenPtr.pb = RedPtr.pb + _NEG_PAGEWIDTH600;
BluePtr.pb = GreenPtr.pb + _NEG_PAGEWIDTH600;
for( i = 16; i-- && !dev->shade.fStop;) {
dev->shade.fStop = SANE_TRUE;
u12shading_FillToDAC( dev, &dev->RegDACGain, &dev->shade.Gain );
u12io_DataToRegister( dev, REG_MODECONTROL, _ModeIdle );
dev->regs.RD_ScanControl = _SCAN_BYTEMODE;
u12hw_SelectLampSource( dev );
dev->regs.RD_ModeControl = _ModeScan;
dev->regs.RD_StepControl = _MOTOR0_SCANSTATE;
dev->regs.RD_Motor0Control = _FORWARD_MOTOR;
memset( dev->scanStates, 0, _SCANSTATE_BYTES );
dev->scanStates[1] = 0x77;
u12io_PutOnAllRegisters( dev );
_DODELAY( 50 );
if(u12io_ReadOneShadingLine( dev,
dev->bufs.b1.pShadingMap,_NEG_PAGEWIDTH600)) {
bHi[0] = u12shading_SumGains( RedPtr.pb, 32 );
bHi[1] = u12shading_SumGains( GreenPtr.pb, 32 );
bHi[2] = u12shading_SumGains( BluePtr.pb, 32 );
if( !bHi[0] || !bHi[1] || !bHi[2]) {
dev->shade.fStop = SANE_FALSE;
} else {
u12shading_AdjustGain( dev, _CHANNEL_RED, bHi[0] );
u12shading_AdjustGain( dev, _CHANNEL_GREEN, bHi[1] );
u12shading_AdjustGain( dev, _CHANNEL_BLUE, bHi[2] );
}
} else {
dev->shade.fStop = SANE_FALSE;
}
}
u12shading_FillToDAC( dev, &dev->RegDACGain, &dev->shade.Gain );
/* Set RGB Gain */
if( dwR && dwG && dwB ) {
if(dev->CCDID == _CCD_3797 || dev->DACType == _DA_ESIC ) {
dev->shade.pCcdDac->GainResize.Colors.Red =
(u_short)((u_long)bHi[0] * 100UL / dwR);
dev->shade.pCcdDac->GainResize.Colors.Green =
(u_short)((u_long)bHi[1] * 100UL / dwG);
dev->shade.pCcdDac->GainResize.Colors.Blue =
(u_short)((u_long)bHi[2] * 100UL / dwB);
} else {
dev->shade.pCcdDac->GainResize.Colors.Red =
(u_short)((u_long)bHi[0] * 90UL / dwR);
dev->shade.pCcdDac->GainResize.Colors.Green =
(u_short)((u_long)bHi[1] * 77UL / dwG);
dev->shade.pCcdDac->GainResize.Colors.Blue =
(u_short)((u_long)bHi[2] * 73UL / dwB);
}
dev->shade.DarkOffset.Colors.Red +=
(u_short)((dwR > bHi[0]) ? dwR - bHi[0] : 0);
dev->shade.DarkOffset.Colors.Green +=
(u_short)((dwG > bHi[1]) ? dwG - bHi[1] : 0);
dev->shade.DarkOffset.Colors.Blue +=
(u_short)((dwB > bHi[2]) ? dwB - bHi[2] : 0);
if( dev->DACType != _DA_ESIC && dev->CCDID != _CCD_3799 ) {
dev->shade.DarkOffset.Colors.Red =
(u_short)(dev->shade.DarkOffset.Colors.Red *
dev->shade.pCcdDac->GainResize.Colors.Red / 100UL);
dev->shade.DarkOffset.Colors.Green =
(u_short)(dev->shade.DarkOffset.Colors.Green *
dev->shade.pCcdDac->GainResize.Colors.Green / 100UL);
dev->shade.DarkOffset.Colors.Blue =
(u_short)(dev->shade.DarkOffset.Colors.Blue *
dev->shade.pCcdDac->GainResize.Colors.Blue / 100UL);
}
}
/* AdjustDark () */
dev->regs.RD_Origin = _SHADING_BEGINX;
dev->regs.RD_Pixels = 5400;
}
/** perform some adjustments according to the source (normal, transparency etc)
*/
static void u12tpa_FindCenterPointer( U12_Device *dev )
{
u_long i;
u_long width;
u_long left;
u_long right;
RGBUShortDef *pwSum = dev->bufs.b2.pSumRGB;
if( dev->DataInf.dwScanFlag & _SCANDEF_Negative )
width = _NEG_PAGEWIDTH600;
else
width = _NEG_PAGEWIDTH600 - 94;
/* 2.54 cm tolerance */
left = _DATA_ORIGIN_X + _NEG_ORG_OFFSETX * 2 - 600;
right = _DATA_ORIGIN_X + _NEG_ORG_OFFSETX * 2 +
_NEG_PAGEWIDTH600 + 600;
for( i = 5400UL - left, pwSum = dev->bufs.b2.pSumRGB; i--; left++)
if( pwSum[left].Red > _NEG_EDGE_VALUE &&
pwSum[left].Green > _NEG_EDGE_VALUE &&
pwSum[left].Blue > _NEG_EDGE_VALUE)
break;
for( i = 5400UL - left, pwSum = dev->bufs.b2.pSumRGB; i--; right--)
if( pwSum[right].Red > _NEG_EDGE_VALUE &&
pwSum[right].Green > _NEG_EDGE_VALUE &&
pwSum[right].Blue > _NEG_EDGE_VALUE)
break;
if((right <= left) || ((right - left) < width)) {
if( dev->DataInf.dwScanFlag & _SCANDEF_Negative )
dev->scan.negBegin = _DATA_ORIGIN_X + _NEG_ORG_OFFSETX * 2;
else
dev->scan.posBegin = _DATA_ORIGIN_X + _POS_ORG_OFFSETX * 2;
} else {
if( dev->DataInf.dwScanFlag & _SCANDEF_Negative )
dev->scan.negBegin = (right + left) / 2UL - _NEG_PAGEWIDTH;
else
dev->scan.posBegin = (right + left) / 2UL - _POS_PAGEWIDTH;
}
}
/* END U12_TPA.C ............................................................*/
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