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-rw-r--r--backend/u12-tpa.c441
1 files changed, 441 insertions, 0 deletions
diff --git a/backend/u12-tpa.c b/backend/u12-tpa.c
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+++ b/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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