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sane-project-backends/backend/plustek-usbimg.c

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38 KiB
C
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/*.............................................................................
* Project : SANE library for Plustek flatbed scanners.
*.............................................................................
*/
/** @file plustek-usbimg.c
* @brief Image processing functions for copying and scaling image lines.
*
* Based on sources acquired from Plustek Inc.<br>
* Copyright (C) 2001-2004 Gerhard Jaeger <gerhard@gjaeger.de>
*
* History:
* - 0.40 - starting version of the USB support
* - 0.41 - fixed the 14bit problem for LM9831 devices
* - 0.42 - no changes
* - 0.43 - no changes
* - 0.44 - added CIS parts and dumpPic function
* - 0.45 - added gray scaling functions for CIS devices
* - fixed usb_GrayScale16 function
* - fixed a bug in usb_ColorScale16_2 function
* - fixed endless loop bug
* - fixed a bug in usb_GrayScalePseudo16 function
* - fixed a bug in usb_GrayDuplicatePseudo16 function
* - removed the scaler stuff for CIS devices
* - 0.46 - minor fixes
* - 0.47 - added big-endian/little endian stuff
* .
* <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>
*/
#define _SCALER 1000
static u_char bShift, Shift;
static u_char *pbSrce, *pbDest;
static int iNext;
static u_long dwPixels, dwBitsPut;
static u_short wSum, Mask;
static u_short *pwDest;
static u_short wR, wG, wB;
static pHiLoDef pwm;
/*
*
*/
static u_char BitsReverseTable[256] =
{
0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0, 0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8, 0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4, 0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec, 0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2, 0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea, 0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6, 0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee, 0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1, 0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9, 0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5, 0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed, 0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3, 0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb, 0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7, 0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef, 0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff
};
#if 0
inline void ReverseBits(int b, u_charPBYTE &pTar, int &iByte, int &iWeightSum,
int iSrcWeight = 0, int iTarWeight = 0, int cMax = 8);
#endif
static void ReverseBits( int b, u_char **pTar, int *iByte, int *iWeightSum,
int iSrcWeight, int iTarWeight, int cMax )
{
int bit;
cMax = (1 << cMax);
if(iSrcWeight == iTarWeight)
{
for( bit = 1; bit < cMax; bit <<= 1) {
*iByte <<= 1;
if(b & bit)
*iByte |= 1;
if(*iByte >= 0x100) {
**pTar++ = (u_char)*iByte;
*iByte = 1;
}
}
}
else
{
for( bit = 1; bit < cMax; bit <<= 1 ) {
*iWeightSum += iTarWeight;
while(*iWeightSum >= iSrcWeight)
{
*iWeightSum -= iSrcWeight;
*iByte <<= 1;
if(b & bit)
*iByte |= 1;
if(*iByte >= 0x100)
{
**pTar++ = (u_char)*iByte;
*iByte = 1;
}
}
}
}
}
#if 0
void ReverseBitStream(PBYTE pSrc, PBYTE pTar, int iPixels, int iBufSize,
int iSrcWeight = 0, int iTarWeight = 0, int iPadBit = 1);
#endif
static void usb_ReverseBitStream( u_char *pSrc, u_char *pTar, int iPixels,
int iBufSize, int iSrcWeight/* = 0*/,
int iTarWeight/* = 0*/, int iPadBit/* = 1*/)
{
int i;
int iByte = 1;
int cBytes = iPixels / 8;
int cBits = iPixels % 8;
u_char bPad = iPadBit? 0xff: 0;
u_char *pTarget = pTar;
int iWeightSum = 0;
if(iSrcWeight == iTarWeight)
{
if(cBits)
{
int cShift = 8 - cBits;
for(i = cBytes, pSrc = pSrc + cBytes - 1; i > 0; i--, pSrc--, pTar++)
*pTar = BitsReverseTable[(u_char)((*pSrc << cBits) | (*(pSrc+1) >> cShift))];
ReverseBits(*(pSrc+1) >> cShift, &pTar, &iByte, &iWeightSum, iSrcWeight, iTarWeight, cBits);
}
else /* byte boundary */
{
for(i = cBytes, pSrc = pSrc + cBytes - 1; i > 0; i--, pSrc--, pTar++)
*pTar = BitsReverseTable[*pSrc];
}
}
else /* To shrink or enlarge */
{
if(cBits)
{
int cShift = 8 - cBits;
for(i = cBytes, pSrc = pSrc + cBytes - 1; i > 0; i--, pSrc--)
ReverseBits((*pSrc << cBits) | (*(pSrc+1) >> cShift), &pTar, &iByte, &iWeightSum, iSrcWeight, iTarWeight, 8);
ReverseBits(*(pSrc+1) >> cShift, &pTar, &iByte, &iWeightSum, iSrcWeight, iTarWeight, cBits);
}
else /* byte boundary */
{
for(i = cBytes, pSrc = pSrc + cBytes - 1; i > 0; i--, pSrc--)
ReverseBits(*pSrc, &pTar, &iByte, &iWeightSum, iSrcWeight, iTarWeight, 8);
}
}
if(iByte != 1)
{
while(iByte < 0x100)
{
iByte <<= 1;
iByte |= iPadBit;
}
*pTar++ = (u_char)iByte;
}
cBytes = (int)(pTar - pTarget);
for(i = iBufSize - cBytes; i > 0; i--, pTar++)
*pTar = bPad;
}
/**
*/
static void usb_AverageColorByte( struct Plustek_Device *dev )
{
u_long dw;
pScanDef scanning = &dev->scanning;
if((scanning->sParam.bSource == SOURCE_Negative ||
scanning->sParam.bSource == SOURCE_Transparency) &&
scanning->sParam.PhyDpi.x > 800) {
for (dw = 0; dw < (scanning->sParam.Size.dwPhyPixels - 1); dw++)
{
scanning->Red.pcb[dw].a_bColor[0] =
(u_char)(((u_short)scanning->Red.pcb[dw].a_bColor[0] +
(u_short)scanning->Red.pcb[dw + 1].a_bColor[0]) / 2);
scanning->Green.pcb[dw].a_bColor[0] =
(u_char)(((u_short)scanning->Green.pcb[dw].a_bColor[0] +
(u_short)scanning->Green.pcb[dw + 1].a_bColor[0]) / 2);
scanning->Blue.pcb[dw].a_bColor[0] =
(u_char)(((u_short)scanning->Blue.pcb[dw].a_bColor[0] +
(u_short)scanning->Blue.pcb[dw + 1].a_bColor[0]) / 2);
}
}
}
/**
*/
static void usb_AverageColorWord( struct Plustek_Device *dev )
{
u_char ls = 2;
u_long dw;
pScanDef scan = &dev->scanning;
if((scan->sParam.bSource == SOURCE_Negative ||
scan->sParam.bSource == SOURCE_Transparency) &&
scan->sParam.PhyDpi.x > 800) {
scan->Red.pcw[0].Colors[0] = _HILO2WORD(scan->Red.pcw[0].HiLo[0]) >> ls;
scan->Green.pcw[0].Colors[0] = _HILO2WORD(scan->Green.pcw[0].HiLo[0]) >> ls;
scan->Blue.pcw[0].Colors[0] = _HILO2WORD(scan->Blue.pcw[0].HiLo[0]) >> ls;
for (dw = 0; dw < (scan->sParam.Size.dwPhyPixels - 1); dw++)
{
scan->Red.pcw[dw + 1].Colors[0] = _HILO2WORD(scan->Red.pcw[dw + 1].HiLo[0]) >> ls;
scan->Green.pcw[dw + 1].Colors[0] = _HILO2WORD(scan->Green.pcw[dw + 1].HiLo[0]) >> ls;
scan->Blue.pcw[dw + 1].Colors[0] = _HILO2WORD(scan->Blue.pcw[dw + 1].HiLo[0]) >> ls;
scan->Red.pcw[dw].Colors[0] = (u_short)(((u_long)scan->Red.pcw[dw].Colors[0] +
(u_long)scan->Red.pcw[dw + 1].Colors[0]) / 2);
scan->Green.pcw[dw].Colors[0] = (u_short)(((u_long)scan->Green.pcw[dw].Colors[0] +
(u_long)scan->Green.pcw[dw + 1].Colors[0]) / 2);
scan->Blue.pcw[dw].Colors[0] = (u_short)(((u_long)scan->Blue.pcw[dw].Colors[0] +
(u_long)scan->Blue.pcw[dw + 1].Colors[0]) / 2);
scan->Red.pcw[dw].Colors[0] = _HILO2WORD(scan->Red.pcw[dw].HiLo[0]) << ls;
scan->Green.pcw[dw].Colors[0] = _HILO2WORD(scan->Green.pcw[dw].HiLo[0]) << ls;
scan->Blue.pcw[dw].Colors[0] = _HILO2WORD(scan->Blue.pcw[dw].HiLo[0]) << ls;
}
scan->Red.pcw[dw].Colors[0] = _HILO2WORD(scan->Red.pcw[dw].HiLo[0]) << ls;
scan->Green.pcw[dw].Colors[0] = _HILO2WORD(scan->Green.pcw[dw].HiLo[0]) << ls;
scan->Blue.pcw[dw].Colors[0] = _HILO2WORD(scan->Blue.pcw[dw].HiLo[0]) << ls;
}
}
/**
*/
static void usb_AverageGrayByte( struct Plustek_Device *dev )
{
u_long dw;
pScanDef scanning = &dev->scanning;
if((scanning->sParam.bSource == SOURCE_Negative ||
scanning->sParam.bSource == SOURCE_Transparency) &&
scanning->sParam.PhyDpi.x > 800)
{
for (dw = 0; dw < (scanning->sParam.Size.dwPhyPixels - 1); dw++)
scanning->Green.pb[dw] = (u_char)(((u_short)scanning->Green.pb[dw]+
(u_short)scanning->Green.pb[dw+1]) / 2);
}
}
/**
*/
static void usb_AverageGrayWord( struct Plustek_Device *dev )
{
u_long dw;
pScanDef scanning = &dev->scanning;
if((scanning->sParam.bSource == SOURCE_Negative ||
scanning->sParam.bSource == SOURCE_Transparency) &&
scanning->sParam.PhyDpi.x > 800)
{
scanning->Green.pw[0] = _HILO2WORD(scanning->Green.philo[0]) >> 2;
for (dw = 0; dw < (scanning->sParam.Size.dwPhyPixels - 1); dw++)
{
scanning->Green.pw[dw + 1] = _HILO2WORD(scanning->Green.philo[dw+1]) >> 2;
scanning->Green.pw[dw] = (u_short)(((u_long)scanning->Green.pw[dw]+
(u_long)scanning->Green.pw[dw+1]) / 2);
scanning->Green.pw[dw] = _HILO2WORD(scanning->Green.philo[dw]) << 2;
}
scanning->Green.pw[dw] = _HILO2WORD(scanning->Green.philo[dw]) << 2;
}
}
/**
* returns the zoom value, used for our scaling algorithm (DDA algo
* digital differential analyzer).
*/
static int usb_GetScaler( pScanDef scanning )
{
double ratio;
ratio = (double)scanning->sParam.UserDpi.x/
(double)scanning->sParam.PhyDpi.x;
return (int)(1.0/ratio * _SCALER);
}
/**
*
*/
static void usb_ColorScaleGray( struct Plustek_Device *dev )
{
int izoom, ddax;
u_long dw;
pScanDef scanning = &dev->scanning;
usb_AverageColorByte( dev );
dw = scanning->sParam.Size.dwPixels;
if( scanning->sParam.bSource == SOURCE_ADF ) {
iNext = -1;
dwPixels = scanning->sParam.Size.dwPixels - 1;
} else {
iNext = 1;
dwPixels = 0;
}
izoom = usb_GetScaler( scanning );
switch( scanning->fGrayFromColor ) {
case 1:
for( dwBitsPut = 0, ddax = 0; dw; dwBitsPut++ ) {
ddax -= _SCALER;
while((ddax < 0) && (dw > 0)) {
scanning->UserBuf.pb[dwPixels] =
scanning->Red.pcb[dwBitsPut].a_bColor[0];
dwPixels = dwPixels + iNext;
ddax += izoom;
dw--;
}
}
break;
case 2:
for( dwBitsPut = 0, ddax = 0; dw; dwBitsPut++ ) {
ddax -= _SCALER;
while((ddax < 0) && (dw > 0)) {
scanning->UserBuf.pb[dwPixels] =
scanning->Green.pcb[dwBitsPut].a_bColor[0];
dwPixels = dwPixels + iNext;
ddax += izoom;
dw--;
}
}
break;
case 3:
for( dwBitsPut = 0, ddax = 0; dw; dwBitsPut++ ) {
ddax -= _SCALER;
while((ddax < 0) && (dw > 0)) {
scanning->UserBuf.pb[dwPixels] =
scanning->Blue.pcb[dwBitsPut].a_bColor[0];
dwPixels = dwPixels + iNext;
ddax += izoom;
dw--;
}
}
break;
}
}
/**
*
*/
static void usb_ColorScaleGray_2( struct Plustek_Device *dev )
{
int izoom, ddax;
u_long dw;
pScanDef scanning = &dev->scanning;
usb_AverageColorByte( dev );
dw = scanning->sParam.Size.dwPixels;
if( scanning->sParam.bSource == SOURCE_ADF ) {
iNext = -1;
dwPixels = scanning->sParam.Size.dwPixels - 1;
} else {
iNext = 1;
dwPixels = 0;
}
izoom = usb_GetScaler( scanning );
switch( scanning->fGrayFromColor ) {
case 1:
for( dwBitsPut = 0, ddax = 0; dw; dwBitsPut++ ) {
ddax -= _SCALER;
while((ddax < 0) && (dw > 0)) {
scanning->UserBuf.pb[dwPixels] =
scanning->Red.pb[dwBitsPut];
dwPixels = dwPixels + iNext;
ddax += izoom;
dw--;
}
}
break;
case 2:
for( dwBitsPut = 0, ddax = 0; dw; dwBitsPut++ ) {
ddax -= _SCALER;
while((ddax < 0) && (dw > 0)) {
scanning->UserBuf.pb[dwPixels] =
scanning->Green.pb[dwBitsPut];
dwPixels = dwPixels + iNext;
ddax += izoom;
dw--;
}
}
break;
case 3:
for( dwBitsPut = 0, ddax = 0; dw; dwBitsPut++ ) {
ddax -= _SCALER;
while((ddax < 0) && (dw > 0)) {
scanning->UserBuf.pb[dwPixels] = scanning->Blue.pb[dwBitsPut];
dwPixels = dwPixels + iNext;
ddax += izoom;
dw--;
}
}
break;
}
}
/*.............................................................................
* here we copy and scale from scanner world to user world...
*/
static void usb_ColorScale8( struct Plustek_Device *dev )
{
int izoom, ddax;
u_long dw;
pScanDef scanning = &dev->scanning;
usb_AverageColorByte( dev );
dw = scanning->sParam.Size.dwPixels;
if( scanning->sParam.bSource == SOURCE_ADF ) {
iNext = -1;
dwPixels = scanning->sParam.Size.dwPixels - 1;
} else {
iNext = 1;
dwPixels = 0;
}
izoom = usb_GetScaler( scanning );
for( dwBitsPut = 0, ddax = 0; dw; dwBitsPut++ ) {
ddax -= _SCALER;
while((ddax < 0) && (dw > 0)) {
scanning->UserBuf.pb_rgb[dwPixels].Red =
scanning->Red.pcb[dwBitsPut].a_bColor[0];
scanning->UserBuf.pb_rgb[dwPixels].Green =
scanning->Green.pcb[dwBitsPut].a_bColor[0];
scanning->UserBuf.pb_rgb[dwPixels].Blue =
scanning->Blue.pcb[dwBitsPut].a_bColor[0];
dwPixels = dwPixels + iNext;
ddax += izoom;
dw--;
}
}
}
static void usb_ColorScale8_2( struct Plustek_Device *dev )
{
int izoom, ddax;
u_long dw;
pScanDef scanning = &dev->scanning;
dw = scanning->sParam.Size.dwPixels;
if( scanning->sParam.bSource == SOURCE_ADF ) {
iNext = -1;
dwPixels = scanning->sParam.Size.dwPixels - 1;
} else {
iNext = 1;
dwPixels = 0;
}
izoom = usb_GetScaler( scanning );
for( dwBitsPut = 0, ddax = 0; dw; dwBitsPut++ ) {
ddax -= _SCALER;
while((ddax < 0) && (dw > 0)) {
scanning->UserBuf.pb_rgb[dwPixels].Red =
scanning->Red.pb[dwBitsPut];
scanning->UserBuf.pb_rgb[dwPixels].Green =
scanning->Green.pb[dwBitsPut];
scanning->UserBuf.pb_rgb[dwPixels].Blue =
scanning->Blue.pb[dwBitsPut];
dwPixels = dwPixels + iNext;
ddax += izoom;
dw--;
}
}
}
/**
*
*/
static void usb_ColorScale16( struct Plustek_Device *dev )
{
u_char ls;
int izoom, ddax;
u_long dw;
SANE_Bool swap = usb_HostSwap();
pScanDef scanning = &dev->scanning;
usb_AverageColorWord( dev );
dw = scanning->sParam.Size.dwPixels;
if( scanning->sParam.bSource == SOURCE_ADF ) {
iNext = -1;
dwPixels = scanning->sParam.Size.dwPixels - 1;
} else {
iNext = 1;
dwPixels = 0;
}
izoom = usb_GetScaler( scanning );
if( scanning->dwFlag & SCANFLAG_RightAlign )
ls = Shift;
else
ls = 0;
for( dwBitsPut = 0, ddax = 0; dw; dwBitsPut++ ) {
ddax -= _SCALER;
while((ddax < 0) && (dw > 0)) {
if( swap ) {
scanning->UserBuf.pw_rgb[dwPixels].Red =
_HILO2WORD(scanning->Red.pcw[dwBitsPut].HiLo[0]) >> ls;
scanning->UserBuf.pw_rgb[dwPixels].Green =
_HILO2WORD(scanning->Green.pcw[dwBitsPut].HiLo[0]) >> ls;
scanning->UserBuf.pw_rgb[dwPixels].Blue =
_HILO2WORD(scanning->Blue.pcw[dwBitsPut].HiLo[0]) >> ls;
} else {
scanning->UserBuf.pw_rgb[dwPixels].Red =
scanning->Red.pw[dwBitsPut] >> ls;
scanning->UserBuf.pw_rgb[dwPixels].Green =
scanning->Green.pw[dwBitsPut] >> ls;
scanning->UserBuf.pw_rgb[dwPixels].Blue =
scanning->Blue.pw[dwBitsPut] >> ls;
}
dwPixels = dwPixels + iNext;
ddax += izoom;
dw--;
}
}
}
/**
*
*/
static void usb_ColorScale16_2( struct Plustek_Device *dev )
{
u_char ls;
HiLoDef tmp;
int izoom, ddax;
u_long dw;
SANE_Bool swap = usb_HostSwap();
pScanDef scanning = &dev->scanning;
usb_AverageColorWord( dev );
dw = scanning->sParam.Size.dwPixels;
if( scanning->sParam.bSource == SOURCE_ADF ) {
iNext = -1;
dwPixels = scanning->sParam.Size.dwPixels - 1;
} else {
iNext = 1;
dwPixels = 0;
}
izoom = usb_GetScaler( scanning );
if( scanning->dwFlag & SCANFLAG_RightAlign )
ls = Shift;
else
ls = 0;
for( dwBitsPut = 0, ddax = 0; dw; dwBitsPut++ ) {
ddax -= _SCALER;
while((ddax < 0) && (dw > 0)) {
if( swap ) {
tmp = *((pHiLoDef)&scanning->Red.pw[dwBitsPut]);
scanning->UserBuf.pw_rgb[dwPixels].Red = _HILO2WORD(tmp) >> ls;
tmp = *((pHiLoDef)&scanning->Green.pw[dwBitsPut]);
scanning->UserBuf.pw_rgb[dwPixels].Green = _HILO2WORD(tmp) >> ls;
tmp = *((pHiLoDef)&scanning->Blue.pw[dwBitsPut]);
scanning->UserBuf.pw_rgb[dwPixels].Blue = _HILO2WORD(tmp) >> ls;
} else {
scanning->UserBuf.pw_rgb[dwPixels].Red =
scanning->Red.pw[dwBitsPut] >> ls;
scanning->UserBuf.pw_rgb[dwPixels].Green =
scanning->Green.pw[dwBitsPut] >> ls;
scanning->UserBuf.pw_rgb[dwPixels].Blue =
scanning->Blue.pw[dwBitsPut] >> ls;
}
dwPixels = dwPixels + iNext;
ddax += izoom;
dw--;
}
}
}
/**
*/
static void usb_ColorScalePseudo16( struct Plustek_Device *dev )
{
int izoom, ddax;
u_long dw;
pScanDef scanning = &dev->scanning;
usb_AverageColorByte( dev );
dw = scanning->sParam.Size.dwPixels;
if( scanning->sParam.bSource == SOURCE_ADF ) {
iNext = -1;
dwPixels = scanning->sParam.Size.dwPixels - 1;
} else {
iNext = 1;
dwPixels = 0;
}
izoom = usb_GetScaler( scanning );
wR = (u_short)scanning->Red.pcb[0].a_bColor[0];
wG = (u_short)scanning->Green.pcb[0].a_bColor[1];
wB = (u_short)scanning->Blue.pcb[0].a_bColor[2];
for( dwBitsPut = 0, ddax = 0; dw; dwBitsPut++ ) {
ddax -= _SCALER;
while((ddax < 0) && (dw > 0)) {
scanning->UserBuf.pw_rgb[dwPixels].Red =
(wR + scanning->Red.pcb[dwBitsPut].a_bColor[0]) << bShift;
scanning->UserBuf.pw_rgb[dwPixels].Green =
(wG + scanning->Green.pcb[dwBitsPut].a_bColor[0]) << bShift;
scanning->UserBuf.pw_rgb[dwPixels].Blue =
(wB + scanning->Blue.pcb[dwBitsPut].a_bColor[0]) << bShift;
dwPixels = dwPixels + iNext;
ddax += izoom;
dw--;
}
wR = (u_short)scanning->Red.pcb[dwBitsPut].a_bColor[0];
wG = (u_short)scanning->Green.pcb[dwBitsPut].a_bColor[0];
wB = (u_short)scanning->Blue.pcb[dwBitsPut].a_bColor[0];
}
}
/** do a simple memcopy from "driver-space" to "user-space"
*/
static void usb_ColorDuplicate8( struct Plustek_Device *dev )
{
u_long dw;
pScanDef scanning = &dev->scanning;
usb_AverageColorByte( dev );
if( scanning->sParam.bSource == SOURCE_ADF ) {
iNext = -1;
dwPixels = scanning->sParam.Size.dwPixels - 1;
} else {
iNext = 1;
dwPixels = 0;
}
for( dw = 0; dw < scanning->sParam.Size.dwPixels;
dw++, dwPixels = dwPixels + iNext ) {
scanning->UserBuf.pb_rgb[dwPixels].Red =
scanning->Red.pcb[dw].a_bColor[0];
scanning->UserBuf.pb_rgb[dwPixels].Green =
scanning->Green.pcb[dw].a_bColor[0];
scanning->UserBuf.pb_rgb[dwPixels].Blue =
scanning->Blue.pcb[dw].a_bColor[0];
}
}
/** reorder from rgb line to rgb pixel (CIS scanner)
*/
static void usb_ColorDuplicate8_2( struct Plustek_Device *dev )
{
u_long dw;
pScanDef scanning = &dev->scanning;
if( scanning->sParam.bSource == SOURCE_ADF ) {
iNext = -1;
dwPixels = scanning->sParam.Size.dwPixels - 1;
} else {
iNext = 1;
dwPixels = 0;
}
for( dw = 0; dw < scanning->sParam.Size.dwPixels;
dw++, dwPixels = dwPixels + iNext ) {
scanning->UserBuf.pb_rgb[dwPixels].Red = (u_char)scanning->Red.pb[dw];
scanning->UserBuf.pb_rgb[dwPixels].Green = (u_char)scanning->Green.pb[dw];
scanning->UserBuf.pb_rgb[dwPixels].Blue = (u_char)scanning->Blue.pb[dw];
}
}
/**
*/
static void usb_ColorDuplicate16( struct Plustek_Device *dev )
{
u_char ls;
u_long dw;
pScanDef scan = &dev->scanning;
SANE_Bool swap = usb_HostSwap();
usb_AverageColorWord( dev );
if( scan->sParam.bSource == SOURCE_ADF ) {
iNext = -1;
dwPixels = scan->sParam.Size.dwPixels - 1;
} else {
iNext = 1;
dwPixels = 0;
}
if( scan->dwFlag & SCANFLAG_RightAlign )
ls = Shift;
else
ls = 0;
for (dw = 0; dw < scan->sParam.Size.dwPixels; dw++,
dwPixels = dwPixels + iNext) {
if( swap ) {
scan->UserBuf.pw_rgb[dwPixels].Red =
_HILO2WORD(scan->Red.pcw[dw].HiLo[0]) >> ls;
scan->UserBuf.pw_rgb[dwPixels].Green =
_HILO2WORD(scan->Green.pcw[dw].HiLo[0]) >> ls;
scan->UserBuf.pw_rgb[dwPixels].Blue =
_HILO2WORD(scan->Blue.pcw[dw].HiLo[0]) >> ls;
} else {
scan->UserBuf.pw_rgb[dwPixels].Red = scan->Red.pw[dw] >> ls;
scan->UserBuf.pw_rgb[dwPixels].Green= scan->Green.pw[dw] >> ls;
scan->UserBuf.pw_rgb[dwPixels].Blue = scan->Blue.pw[dw] >> ls;
}
}
}
/**
*/
static void usb_ColorDuplicate16_2( struct Plustek_Device *dev )
{
u_char ls;
HiLoDef tmp;
u_long dw;
pScanDef scan = &dev->scanning;
SANE_Bool swap = usb_HostSwap();
usb_AverageColorWord( dev );
if( scan->sParam.bSource == SOURCE_ADF ) {
iNext = -1;
dwPixels = scan->sParam.Size.dwPixels - 1;
} else {
iNext = 1;
dwPixels = 0;
}
if( scan->dwFlag & SCANFLAG_RightAlign )
ls = Shift;
else
ls = 0;
for( dw = 0; dw < scan->sParam.Size.dwPixels;
dw++, dwPixels = dwPixels + iNext) {
if( swap ) {
tmp = *((pHiLoDef)&scan->Red.pw[dw]);
scan->UserBuf.pw_rgb[dwPixels].Red = _HILO2WORD(tmp) >> ls;
tmp = *((pHiLoDef)&scan->Green.pw[dw]);
scan->UserBuf.pw_rgb[dwPixels].Green = _HILO2WORD(tmp) >> ls;
tmp = *((pHiLoDef)&scan->Blue.pw[dw]);
scan->UserBuf.pw_rgb[dwPixels].Blue = _HILO2WORD(tmp) >> ls;
} else {
scan->UserBuf.pw_rgb[dwPixels].Red = scan->Red.pw[dw] >> ls;
scan->UserBuf.pw_rgb[dwPixels].Green = scan->Green.pw[dw] >> ls;
scan->UserBuf.pw_rgb[dwPixels].Blue = scan->Blue.pw[dw] >> ls;
}
}
}
/**
*/
static void usb_ColorDuplicatePseudo16( struct Plustek_Device *dev )
{
u_long dw;
pScanDef scanning = &dev->scanning;
usb_AverageColorByte( dev );
if (scanning->sParam.bSource == SOURCE_ADF)
{
iNext = -1;
dwPixels = scanning->sParam.Size.dwPixels - 1;
}
else
{
iNext = 1;
dwPixels = 0;
}
wR = (u_short)scanning->Red.pcb[0].a_bColor[0];
wG = (u_short)scanning->Green.pcb[0].a_bColor[0];
wB = (u_short)scanning->Blue.pcb[0].a_bColor[0];
for (dw = 0; dw < scanning->sParam.Size.dwPixels; dw++, dwPixels = dwPixels + iNext)
{
scanning->UserBuf.pw_rgb[dwPixels].Red =
(wR + scanning->Red.pcb[dw].a_bColor[0]) << bShift;
scanning->UserBuf.pw_rgb[dwPixels].Green =
(wG + scanning->Green.pcb[dw].a_bColor[0]) << bShift;
scanning->UserBuf.pw_rgb[dwPixels].Blue =
(wB + scanning->Blue.pcb[dw].a_bColor[0]) << bShift;
wR = (u_short)scanning->Red.pcb[dw].a_bColor[0];
wG = (u_short)scanning->Green.pcb[dw].a_bColor[0];
wB = (u_short)scanning->Blue.pcb[dw].a_bColor[0];
}
}
/**
*
*/
static void usb_ColorDuplicateGray( struct Plustek_Device *dev )
{
u_long dw;
pScanDef scan = &dev->scanning;
usb_AverageColorByte( dev );
if (scan->sParam.bSource == SOURCE_ADF) {
iNext = -1;
dwPixels = scan->sParam.Size.dwPixels - 1;
} else {
iNext = 1;
dwPixels = 0;
}
switch(scan->fGrayFromColor) {
case 1:
for (dw = 0; dw < scan->sParam.Size.dwPixels; dw++, dwPixels = dwPixels + iNext)
scan->UserBuf.pb[dwPixels] = scan->Red.pcb[dw].a_bColor[0];
break;
case 2:
for (dw = 0; dw < scan->sParam.Size.dwPixels; dw++, dwPixels = dwPixels + iNext)
scan->UserBuf.pb[dwPixels] = scan->Green.pcb[dw].a_bColor[0];
break;
case 3:
for (dw = 0; dw < scan->sParam.Size.dwPixels; dw++, dwPixels = dwPixels + iNext)
scan->UserBuf.pb[dwPixels] = scan->Blue.pcb[dw].a_bColor[0];
break;
}
}
/**
*/
static void usb_ColorDuplicateGray_2( struct Plustek_Device *dev )
{
u_long dw;
pScanDef scanning = &dev->scanning;
usb_AverageColorByte( dev );
if (scanning->sParam.bSource == SOURCE_ADF)
{
iNext = -1;
dwPixels = scanning->sParam.Size.dwPixels - 1;
}
else
{
iNext = 1;
dwPixels = 0;
}
switch(scanning->fGrayFromColor)
{
case 1:
for (dw = 0; dw < scanning->sParam.Size.dwPixels; dw++, dwPixels = dwPixels + iNext)
scanning->UserBuf.pb[dwPixels] = scanning->Red.pb[dw];
break;
case 2:
for (dw = 0; dw < scanning->sParam.Size.dwPixels; dw++, dwPixels = dwPixels + iNext)
scanning->UserBuf.pb[dwPixels] = scanning->Green.pb[dw];
break;
case 3:
for (dw = 0; dw < scanning->sParam.Size.dwPixels; dw++, dwPixels = dwPixels + iNext)
scanning->UserBuf.pb[dwPixels] = scanning->Blue.pb[dw];
break;
}
}
/**
*/
static void usb_BWScale( struct Plustek_Device *dev )
{
u_char tmp;
int izoom, ddax;
u_long i, dw;
pScanDef scanning = &dev->scanning;
pbSrce = scanning->Green.pb;
if( scanning->sParam.bSource == SOURCE_ADF ) {
int iSum = wSum;
usb_ReverseBitStream(scanning->Green.pb, scanning->UserBuf.pb,
scanning->sParam.Size.dwValidPixels,
scanning->dwBytesLine,
scanning->sParam.PhyDpi.x,
scanning->sParam.UserDpi.x, 1 );
wSum = iSum;
return;
} else {
pbDest = scanning->UserBuf.pb;
iNext = 1;
}
izoom = usb_GetScaler( scanning );
memset( pbDest, 0, scanning->dwBytesLine );
ddax = 0;
dw = 0;
for( i = 0; i < scanning->sParam.Size.dwValidPixels; i++ ) {
ddax -= _SCALER;
while( ddax < 0 ) {
tmp = pbSrce[(i>>3)];
if((dw>>3) < scanning->sParam.Size.dwValidPixels ) {
if( 0 != (tmp &= (1 << ((~(i & 0x7))&0x7))))
pbDest[dw>>3] |= (1 << ((~(dw & 0x7))&0x7));
}
dw++;
ddax += izoom;
}
}
}
/**
*/
static void usb_BWDuplicate( struct Plustek_Device *dev )
{
pScanDef scanning = &dev->scanning;
if(scanning->sParam.bSource == SOURCE_ADF)
{
usb_ReverseBitStream( scanning->Green.pb, scanning->UserBuf.pb,
scanning->sParam.Size.dwValidPixels,
scanning->dwBytesLine, 0, 0, 1 );
} else {
memcpy( scanning->UserBuf.pb,
scanning->Green.pb, scanning->sParam.Size.dwBytes );
}
}
/**
*/
static void usb_GrayScale8( struct Plustek_Device *dev )
{
int izoom, ddax;
pScanDef scanning = &dev->scanning;
usb_AverageGrayByte( dev );
pbSrce = scanning->Green.pb;
if( scanning->sParam.bSource == SOURCE_ADF ) {
pbDest = scanning->UserBuf.pb + scanning->sParam.Size.dwPixels - 1;
iNext = -1;
} else {
pbDest = scanning->UserBuf.pb;
iNext = 1;
}
izoom = usb_GetScaler( scanning );
ddax = 0;
for( dwPixels = scanning->sParam.Size.dwPixels; dwPixels; pbSrce++ ) {
ddax -= _SCALER;
while((ddax < 0) && (dwPixels > 0)) {
*pbDest = *pbSrce;
pbDest = pbDest + iNext;
ddax += izoom;
dwPixels--;
}
}
}
/**
*/
static void usb_GrayScale16( struct Plustek_Device *dev )
{
u_char ls;
int izoom, ddax;
pScanDef scanning = &dev->scanning;
SANE_Bool swap = usb_HostSwap();
usb_AverageGrayWord( dev);
pwm = scanning->Green.philo;
wSum = scanning->sParam.PhyDpi.x;
if( scanning->sParam.bSource == SOURCE_ADF ) {
iNext = -1;
pwDest = scanning->UserBuf.pw + scanning->sParam.Size.dwPixels - 1;
} else {
iNext = 1;
pwDest = scanning->UserBuf.pw;
}
izoom = usb_GetScaler( scanning );
ddax = 0;
if( scanning->dwFlag & SCANFLAG_RightAlign )
ls = Shift;
else
ls = 0;
for( dwPixels = scanning->sParam.Size.dwPixels; dwPixels; pwm++ ) {
ddax -= _SCALER;
while((ddax < 0) && (dwPixels > 0)) {
if( swap )
*pwDest = _PHILO2WORD( pwm ) >> ls;
else
*pwDest = *((u_short*)pwm) >> ls;
pwDest = pwDest + iNext;
ddax += izoom;
dwPixels--;
}
}
}
/**
*/
static void usb_GrayScalePseudo16( struct Plustek_Device *dev )
{
int izoom, ddax;
pScanDef scanning = &dev->scanning;
usb_AverageGrayByte( dev );
if( scanning->sParam.bSource == SOURCE_ADF ) {
iNext = -1;
pwDest = scanning->UserBuf.pw + scanning->sParam.Size.dwPixels - 1;
} else {
iNext = 1;
pwDest = scanning->UserBuf.pw;
}
pbSrce = scanning->Green.pb;
wG = (u_short)*pbSrce;
izoom = usb_GetScaler( scanning );
ddax = 0;
for( dwPixels = scanning->sParam.Size.dwPixels; dwPixels; pbSrce++ ) {
ddax -= _SCALER;
while((ddax < 0) && (dwPixels > 0)) {
*pwDest = (wG + *pbSrce) << bShift;
pwDest = pwDest + iNext;
ddax += izoom;
dwPixels--;
}
wG = (u_short)*pbSrce;
}
}
/**
*
*/
static void usb_GrayDuplicate8( struct Plustek_Device *dev )
{
pScanDef scanning = &dev->scanning;
usb_AverageGrayByte( dev );
if( scanning->sParam.bSource == SOURCE_ADF ) {
dwPixels = scanning->sParam.Size.dwPixels;
pbSrce = scanning->Green.pb;
pbDest = scanning->UserBuf.pb + dwPixels - 1;
for(; dwPixels; dwPixels--, pbSrce++, pbDest--)
*pbDest = *pbSrce;
} else
memcpy( scanning->UserBuf.pb,
scanning->Green.pb, scanning->sParam.Size.dwBytes );
}
/**
*/
static void usb_GrayDuplicate16( struct Plustek_Device *dev )
{
u_char ls;
pScanDef scanning = &dev->scanning;
SANE_Bool swap = usb_HostSwap();
usb_AverageGrayWord( dev );
if( scanning->sParam.bSource == SOURCE_ADF ) {
iNext = -1;
pwDest = scanning->UserBuf.pw + scanning->sParam.Size.dwPixels - 1;
} else {
iNext = 1;
pwDest = scanning->UserBuf.pw;
}
if( scanning->dwFlag & SCANFLAG_RightAlign )
ls = Shift;
else
ls = 0;
pwm = scanning->Green.philo;
for ( dwPixels = scanning->sParam.Size.dwPixels; dwPixels--;
pwm++, pwDest = pwDest + iNext) {
if( swap )
*pwDest = (_PHILO2WORD(pwm)) >> ls;
else
*pwDest = *((u_short*)pwm) >> ls;
}
}
/**
*/
static void usb_GrayDuplicatePseudo16( struct Plustek_Device *dev )
{
pScanDef scanning = &dev->scanning;
usb_AverageGrayByte( dev );
if (scanning->sParam.bSource == SOURCE_ADF)
{
iNext = -1;
pwDest = scanning->UserBuf.pw + scanning->sParam.Size.dwPixels - 1;
}
else
{
iNext = 1;
pwDest = scanning->UserBuf.pw;
}
pbSrce = scanning->Green.pb;
wG = (u_short)*pbSrce;
for( dwPixels = scanning->sParam.Size.dwPixels;
dwPixels--; pbSrce++, pwDest = pwDest + iNext ) {
*pwDest = (wG + *pbSrce) << bShift;
wG = (u_short)*pbSrce;
}
}
/** function to select the apropriate pixel copy function
*/
static void usb_GetImageProc( struct Plustek_Device *dev )
{
pScanDef scanning = &dev->scanning;
pDCapsDef sc = &dev->usbDev.Caps;
pHWDef hw = &dev->usbDev.HwSetting;
bShift = 0;
if( scanning->sParam.UserDpi.x != scanning->sParam.PhyDpi.x ) {
/* Pixel scaling... */
switch( scanning->sParam.bDataType ) {
case SCANDATATYPE_Color:
if (scanning->sParam.bBitDepth > 8) {
if( hw->bReg_0x26 & _ONE_CH_COLOR ) {
scanning->pfnProcess = usb_ColorScale16_2;
DBG( _DBG_INFO, "ImageProc is: ColorScale16_2\n" );
} else {
scanning->pfnProcess = usb_ColorScale16;
DBG( _DBG_INFO, "ImageProc is: ColorScale16\n" );
}
} else if (scanning->dwFlag & SCANFLAG_Pseudo48) {
scanning->pfnProcess = usb_ColorScalePseudo16;
DBG( _DBG_INFO, "ImageProc is: ColorScalePseudo16\n" );
} else if (scanning->fGrayFromColor) {
if( hw->bReg_0x26 & _ONE_CH_COLOR ) {
scanning->pfnProcess = usb_ColorScaleGray_2;
DBG( _DBG_INFO, "ImageProc is: ColorScaleGray_2\n" );
} else {
scanning->pfnProcess = usb_ColorScaleGray;
DBG( _DBG_INFO, "ImageProc is: ColorScaleGray\n" );
}
} else {
if( hw->bReg_0x26 & _ONE_CH_COLOR ) {
scanning->pfnProcess = usb_ColorScale8_2;
DBG( _DBG_INFO, "ImageProc is: ColorScale8_2\n" );
} else {
scanning->pfnProcess = usb_ColorScale8;
DBG( _DBG_INFO, "ImageProc is: ColorScale8\n" );
}
}
break;
case SCANDATATYPE_Gray:
if (scanning->sParam.bBitDepth > 8) {
scanning->pfnProcess = usb_GrayScale16;
DBG( _DBG_INFO, "ImageProc is: GrayScale16\n" );
} else {
if (scanning->dwFlag & SCANFLAG_Pseudo48) {
scanning->pfnProcess = usb_GrayScalePseudo16;
DBG( _DBG_INFO, "ImageProc is: GrayScalePseudo16\n" );
} else {
scanning->pfnProcess = usb_GrayScale8;
DBG( _DBG_INFO, "ImageProc is: GrayScale8\n" );
}
}
break;
default:
scanning->pfnProcess = usb_BWScale;
DBG( _DBG_INFO, "ImageProc is: BWScale\n" );
break;
}
} else {
/* Pixel copy */
switch( scanning->sParam.bDataType ) {
case SCANDATATYPE_Color:
if (scanning->sParam.bBitDepth > 8) {
if( hw->bReg_0x26 & _ONE_CH_COLOR ) {
scanning->pfnProcess = usb_ColorDuplicate16_2;
DBG( _DBG_INFO, "ImageProc is: ColorDuplicate16_2\n" );
} else {
scanning->pfnProcess = usb_ColorDuplicate16;
DBG( _DBG_INFO, "ImageProc is: ColorDuplicate16\n" );
}
} else if (scanning->dwFlag & SCANFLAG_Pseudo48) {
scanning->pfnProcess = usb_ColorDuplicatePseudo16;
DBG( _DBG_INFO, "ImageProc is: ColorDuplicatePseudo16\n" );
} else if (scanning->fGrayFromColor) {
if( hw->bReg_0x26 & _ONE_CH_COLOR ) {
scanning->pfnProcess = usb_ColorDuplicateGray_2;
DBG( _DBG_INFO, "ImageProc is: ColorDuplicateGray_2\n" );
} else {
scanning->pfnProcess = usb_ColorDuplicateGray;
DBG( _DBG_INFO, "ImageProc is: ColorDuplicateGray\n" );
}
} else {
if( hw->bReg_0x26 & _ONE_CH_COLOR ) {
scanning->pfnProcess = usb_ColorDuplicate8_2;
DBG( _DBG_INFO, "ImageProc is: ColorDuplicate8_2\n" );
} else {
scanning->pfnProcess = usb_ColorDuplicate8;
DBG( _DBG_INFO, "ImageProc is: ColorDuplicate8\n" );
}
}
break;
case SCANDATATYPE_Gray:
if (scanning->sParam.bBitDepth > 8) {
scanning->pfnProcess = usb_GrayDuplicate16;
DBG( _DBG_INFO, "ImageProc is: GrayDuplicate16\n" );
} else {
if (scanning->dwFlag & SCANFLAG_Pseudo48) {
scanning->pfnProcess = usb_GrayDuplicatePseudo16;
DBG( _DBG_INFO, "ImageProc is: GrayDuplicatePseudo16\n" );
} else {
scanning->pfnProcess = usb_GrayDuplicate8;
DBG( _DBG_INFO, "ImageProc is: GrayDuplicate8\n" );
}
}
break;
default:
scanning->pfnProcess = usb_BWDuplicate;
DBG( _DBG_INFO, "ImageProc is: BWDuplicate\n" );
break;
}
}
if( scanning->sParam.bBitDepth == 8 ) {
if( scanning->dwFlag & SCANFLAG_Pseudo48 ) {
if( scanning->dwFlag & SCANFLAG_RightAlign ) {
bShift = 5;
} else {
/*
* this should fix the Bearpaw/U12 discrepancy
* in general the fix is needed, but not for the U12
* why? - no idea!
*/
if(_WAF_BSHIFT7_BUG == (_WAF_BSHIFT7_BUG & sc->workaroundFlag))
bShift = 0; /* Holger Bischof 16.12.2001 */
else
bShift = 7;
}
DBG( _DBG_INFO, "bShift adjusted: %u\n", bShift );
}
}
if( _LM9833 == hw->chip ) {
Shift = 0;
Mask = 0xFFFF;
} else {
Shift = 2;
Mask = 0xFFFC;
}
}
/**
* here we read the image data into our intermediate buffer (in the NT version
* the function was implemented as thread)
*/
static SANE_Int usb_ReadData( struct Plustek_Device *dev )
{
u_long dw, dwRet, dwBytes, pl;
pScanDef scanning = &dev->scanning;
pHWDef hw = &dev->usbDev.HwSetting;
DBG( _DBG_READ, "usb_ReadData()\n" );
pl = a_bRegs[0x4e] * hw->wDRAMSize/128;
while( scanning->sParam.Size.dwTotalBytes ) {
if( usb_IsEscPressed()) {
DBG( _DBG_INFO, "usb_ReadData() - Cancel detected...\n" );
return 0;
}
if( scanning->sParam.Size.dwTotalBytes > scanning->dwBytesScanBuf )
dw = scanning->dwBytesScanBuf;
else
dw = scanning->sParam.Size.dwTotalBytes;
scanning->sParam.Size.dwTotalBytes -= dw;
if(!scanning->sParam.Size.dwTotalBytes && dw < (pl * 1024))
{
if(!(a_bRegs[0x4e] = (u_char)ceil((double)dw /
(4.0 * hw->wDRAMSize)))) {
a_bRegs[0x4e] = 1;
}
a_bRegs[0x4f] = 0;
sanei_lm983x_write( dev->fd, 0x4e, &a_bRegs[0x4e], 2, SANE_TRUE );
}
while( scanning->bLinesToSkip ) {
DBG( _DBG_READ, "Skipping %u lines\n", scanning->bLinesToSkip );
dwBytes = scanning->bLinesToSkip*scanning->sParam.Size.dwPhyBytes;
if (dwBytes > scanning->dwBytesScanBuf) {
dwBytes = scanning->dwBytesScanBuf;
scanning->bLinesToSkip -= scanning->dwLinesScanBuf;
} else {
scanning->bLinesToSkip = 0;
}
if( !usb_ScanReadImage( dev, scanning->pbGetDataBuf, dwBytes ))
return 0;
}
if( usb_ScanReadImage( dev, scanning->pbGetDataBuf, dw )) {
dumpPic( "plustek-pic.raw", scanning->pbGetDataBuf, dw );
if( scanning->dwLinesDiscard ) {
DBG( _DBG_READ, "Discarding %lu lines\n",
scanning->dwLinesDiscard );
dwRet = dw / scanning->sParam.Size.dwPhyBytes;
if (scanning->dwLinesDiscard > dwRet) {
scanning->dwLinesDiscard -= dwRet;
dwRet = 0;
} else {
dwRet -= scanning->dwLinesDiscard;
scanning->dwLinesDiscard = 0;
}
} else {
dwRet = dw / scanning->sParam.Size.dwPhyBytes;
}
scanning->pbGetDataBuf += scanning->dwBytesScanBuf;
if( scanning->pbGetDataBuf >= scanning->pbScanBufEnd ) {
scanning->pbGetDataBuf = scanning->pbScanBufBegin;
}
if( dwRet )
return dwRet;
}
}
return 0;
}
/* END PLUSTEK-USBIMG.C .....................................................*/
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