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/* sane - Scanner Access Now Easy.
Copyright (C) Marian Eichholz 2001
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.
*/
/* ======================================================================
Userspace scan tool for the Microtek 3600 scanner
grayscale scan routine
(C) Marian Eichholz 2001
====================================================================== */
#include "sm3600-scantool.h"
/* **********************************************************************
DoScanGray()
********************************************************************** */
#define LINE_THRESHOLD 0x800
static unsigned char uchRegs075[]={
/*R_SPOS*/ 0xFC, /*R_SPOSH*/ 0x00, /*0x03*/ 0x20,
/*R_SWID*/ 0xB0, /*R_SWIDH*/ 0x04, /*R_STPS*/ 0x06,
/*R_STPSH*/ 0x00, /*0x08*/ 0x00, /*0x09*/ 0x3F,
/*R_LEN*/ 0x28, /*R_LENH*/ 0x07, /*0x0C*/ 0x6D,
/*0x0D*/ 0x70, /*0x0E*/ 0x69, /*0x0F*/ 0xD0,
/*0x10*/ 0x00, /*0x11*/ 0x00, /*0x12*/ 0x40,
/*0x13*/ 0x15, /*0x14*/ 0x80, /*0x15*/ 0x2A,
/*0x16*/ 0xC0, /*0x17*/ 0x40, /*0x18*/ 0xC0,
/*0x19*/ 0x40, /*0x1A*/ 0xFF, /*0x1B*/ 0x01,
/*0x1C*/ 0x88, /*0x1D*/ 0x40, /*0x1E*/ 0x4C,
/*0x1F*/ 0x50, /*0x20*/ 0x00, /*0x21*/ 0x0C,
/*0x22*/ 0x21, /*0x23*/ 0xF0, /*0x24*/ 0x40,
/*0x25*/ 0x00, /*0x26*/ 0x0A, /*0x27*/ 0xF0,
/*0x28*/ 0x00, /*0x29*/ 0x00, /*0x2A*/ 0x4E,
/*0x2B*/ 0xF0, /*0x2C*/ 0x00, /*0x2D*/ 0x00,
/*0x2E*/ 0x4E, /*R_CCAL*/ 0x80, /*R_CCAL2*/ 0x80,
/*R_CCAL3*/ 0x80, /*0x32*/ 0xC9, /*0x33*/ 0x20,
/*0x34*/ 0x83, /*0x35*/ 0x29, /*0x36*/ 0x00,
/*0x37*/ 0x00, /*0x38*/ 0x00, /*0x39*/ 0x00,
/*0x3A*/ 0x00, /*0x3B*/ 0x00, /*0x3C*/ 0xFF,
/*0x3D*/ 0x0F, /*0x3E*/ 0x00, /*0x3F*/ 0x00,
/*0x40*/ 0x01, /*0x41*/ 0x00, /*R_CSTAT*/ 0x00,
/*0x43*/ 0x03, /*R_LMP*/ 0x01, /*0x45*/ 0x00,
/*R_CTL*/ 0x39, /*0x47*/ 0xC0, /*0x48*/ 0x40,
/*0x49*/ 0x9E, /*0x4A*/ 0x8C };
static unsigned char uchRegs100[]={
/*R_SPOS*/ 0xFC, /*R_SPOSH*/ 0x00, /*0x03*/ 0x20,
/*R_SWID*/ 0xB0, /*R_SWIDH*/ 0x04, /*R_STPS*/ 0x06,
/*R_STPSH*/ 0x00, /*0x08*/ 0x00, /*0x09*/ 0x3F,
/*R_LEN*/ 0x34, /*R_LENH*/ 0x07, /*0x0C*/ 0x6D,
/*0x0D*/ 0x70, /*0x0E*/ 0x69, /*0x0F*/ 0xD0,
/*0x10*/ 0x00, /*0x11*/ 0x00, /*0x12*/ 0x42,
/*0x13*/ 0x15, /*0x14*/ 0x84, /*0x15*/ 0x2A,
/*0x16*/ 0xC2, /*0x17*/ 0x40, /*0x18*/ 0xC2,
/*0x19*/ 0x40, /*0x1A*/ 0xFF, /*0x1B*/ 0x01,
/*0x1C*/ 0x88, /*0x1D*/ 0x40, /*0x1E*/ 0x4C,
/*0x1F*/ 0x50, /*0x20*/ 0x00, /*0x21*/ 0x0C,
/*0x22*/ 0x21, /*0x23*/ 0xF0, /*0x24*/ 0x40,
/*0x25*/ 0x00, /*0x26*/ 0x0A, /*0x27*/ 0xF0,
/*0x28*/ 0x00, /*0x29*/ 0x00, /*0x2A*/ 0x4E,
/*0x2B*/ 0xF0, /*0x2C*/ 0x00, /*0x2D*/ 0x00,
/*0x2E*/ 0x4E, /*R_CCAL*/ 0x80, /*R_CCAL2*/ 0x80,
/*R_CCAL3*/ 0x80, /*0x32*/ 0xC9, /*0x33*/ 0x20,
/*0x34*/ 0x63, /*0x35*/ 0x29, /*0x36*/ 0x00,
/*0x37*/ 0x00, /*0x38*/ 0x00, /*0x39*/ 0x00,
/*0x3A*/ 0x00, /*0x3B*/ 0x00, /*0x3C*/ 0xFF,
/*0x3D*/ 0x0F, /*0x3E*/ 0x00, /*0x3F*/ 0x00,
/*0x40*/ 0x01, /*0x41*/ 0x00, /*R_CSTAT*/ 0x80,
/*0x43*/ 0x03, /*R_LMP*/ 0x01, /*0x45*/ 0x00,
/*R_CTL*/ 0x39, /*0x47*/ 0xC2, /*0x48*/ 0x40,
/*0x49*/ 0x9E, /*0x4A*/ 0x8C };
static unsigned char uchRegs200[]={
/*R_SPOS*/ 0xFC, /*R_SPOSH*/ 0x00, /*0x03*/ 0x24,
/*R_SWID*/ 0xB0, /*R_SWIDH*/ 0x04, /*R_STPS*/ 0x06,
/*R_STPSH*/ 0x00, /*0x08*/ 0x00, /*0x09*/ 0x3F,
/*R_LEN*/ 0x22, /*R_LENH*/ 0x07, /*0x0C*/ 0x6D,
/*0x0D*/ 0x70, /*0x0E*/ 0x69, /*0x0F*/ 0xD0,
/*0x10*/ 0x00, /*0x11*/ 0x00, /*0x12*/ 0x42,
/*0x13*/ 0x15, /*0x14*/ 0x42, /*0x15*/ 0x15,
/*0x16*/ 0x42, /*0x17*/ 0x15, /*0x18*/ 0x42,
/*0x19*/ 0x15, /*0x1A*/ 0x07, /*0x1B*/ 0x00,
/*0x1C*/ 0x08, /*0x1D*/ 0x12, /*0x1E*/ 0x4C,
/*0x1F*/ 0x50, /*0x20*/ 0x00, /*0x21*/ 0x0C,
/*0x22*/ 0x21, /*0x23*/ 0xF0, /*0x24*/ 0x40,
/*0x25*/ 0x00, /*0x26*/ 0x0A, /*0x27*/ 0xF0,
/*0x28*/ 0x00, /*0x29*/ 0x00, /*0x2A*/ 0x4E,
/*0x2B*/ 0xF0, /*0x2C*/ 0x00, /*0x2D*/ 0x00,
/*0x2E*/ 0x4E, /*R_CCAL*/ 0x80, /*R_CCAL2*/ 0x80,
/*R_CCAL3*/ 0x80, /*0x32*/ 0xC9, /*0x33*/ 0x20,
/*0x34*/ 0x43, /*0x35*/ 0x29, /*0x36*/ 0x00,
/*0x37*/ 0x00, /*0x38*/ 0x00, /*0x39*/ 0x00,
/*0x3A*/ 0x00, /*0x3B*/ 0x00, /*0x3C*/ 0xFF,
/*0x3D*/ 0x0F, /*0x3E*/ 0x00, /*0x3F*/ 0x00,
/*0x40*/ 0x01, /*0x41*/ 0x00, /*R_CSTAT*/ 0x80,
/*0x43*/ 0x03, /*R_LMP*/ 0x01, /*0x45*/ 0x00,
/*R_CTL*/ 0x39, /*0x47*/ 0x42, /*0x48*/ 0x15,
/*0x49*/ 0x9E, /*0x4A*/ 0x8C };
static unsigned char uchRegs300[]={
/*R_SPOS*/ 0xFC, /*R_SPOSH*/ 0x00, /*0x03*/ 0x2A,
/*R_SWID*/ 0xB0, /*R_SWIDH*/ 0x04, /*R_STPS*/ 0x06,
/*R_STPSH*/ 0x00, /*0x08*/ 0x00, /*0x09*/ 0x2A,
/*R_LEN*/ 0x16, /*R_LENH*/ 0x07, /*0x0C*/ 0x6D,
/*0x0D*/ 0x70, /*0x0E*/ 0x69, /*0x0F*/ 0xD0,
/*0x10*/ 0x00, /*0x11*/ 0x00, /*0x12*/ 0x40,
/*0x13*/ 0x15, /*0x14*/ 0x40, /*0x15*/ 0x15,
/*0x16*/ 0x40, /*0x17*/ 0x15, /*0x18*/ 0x40,
/*0x19*/ 0x15, /*0x1A*/ 0x07, /*0x1B*/ 0x00,
/*0x1C*/ 0x08, /*0x1D*/ 0x12, /*0x1E*/ 0x4C,
/*0x1F*/ 0x50, /*0x20*/ 0x00, /*0x21*/ 0x0C,
/*0x22*/ 0x21, /*0x23*/ 0xF0, /*0x24*/ 0x40,
/*0x25*/ 0x00, /*0x26*/ 0x0A, /*0x27*/ 0xF0,
/*0x28*/ 0x00, /*0x29*/ 0x00, /*0x2A*/ 0x4E,
/*0x2B*/ 0xF0, /*0x2C*/ 0x00, /*0x2D*/ 0x00,
/*0x2E*/ 0x4E, /*R_CCAL*/ 0x80, /*R_CCAL2*/ 0x80,
/*R_CCAL3*/ 0x80, /*0x32*/ 0xC9, /*0x33*/ 0x20,
/*0x34*/ 0x03, /*0x35*/ 0x29, /*0x36*/ 0x00,
/*0x37*/ 0x00, /*0x38*/ 0x00, /*0x39*/ 0x00,
/*0x3A*/ 0x00, /*0x3B*/ 0x00, /*0x3C*/ 0xFF,
/*0x3D*/ 0x0F, /*0x3E*/ 0x00, /*0x3F*/ 0x00,
/*0x40*/ 0x01, /*0x41*/ 0x00, /*R_CSTAT*/ 0x80,
/*0x43*/ 0x03, /*R_LMP*/ 0x01, /*0x45*/ 0x00,
/*R_CTL*/ 0x39, /*0x47*/ 0x40, /*0x48*/ 0x15,
/*0x49*/ 0x96, /*0x4A*/ 0x8C };
static unsigned char uchRegs600[]={
/*R_SPOS*/ 0xFC, /*R_SPOSH*/ 0x00, /*0x03*/ 0x3F,
/*R_SWID*/ 0xB0, /*R_SWIDH*/ 0x04, /*R_STPS*/ 0x06,
/*R_STPSH*/ 0x00, /*0x08*/ 0x00, /*0x09*/ 0x3F,
/*R_LEN*/ 0x16, /*R_LENH*/ 0x07, /*0x0C*/ 0x6D,
/*0x0D*/ 0x70, /*0x0E*/ 0x69, /*0x0F*/ 0xD0,
/*0x10*/ 0x00, /*0x11*/ 0x00, /*0x12*/ 0x42,
/*0x13*/ 0x15, /*0x14*/ 0x42, /*0x15*/ 0x15,
/*0x16*/ 0x42, /*0x17*/ 0x15, /*0x18*/ 0x42,
/*0x19*/ 0x15, /*0x1A*/ 0x07, /*0x1B*/ 0x00,
/*0x1C*/ 0x08, /*0x1D*/ 0x12, /*0x1E*/ 0x4C,
/*0x1F*/ 0x50, /*0x20*/ 0x00, /*0x21*/ 0x0C,
/*0x22*/ 0x21, /*0x23*/ 0xF0, /*0x24*/ 0x40,
/*0x25*/ 0x00, /*0x26*/ 0x0A, /*0x27*/ 0xF0,
/*0x28*/ 0x00, /*0x29*/ 0x00, /*0x2A*/ 0x4E,
/*0x2B*/ 0xF0, /*0x2C*/ 0x00, /*0x2D*/ 0x00,
/*0x2E*/ 0x4E, /*R_CCAL*/ 0x80, /*R_CCAL2*/ 0x80,
/*R_CCAL3*/ 0x80, /*0x32*/ 0xC9, /*0x33*/ 0x20,
/*0x34*/ 0x03, /*0x35*/ 0x29, /*0x36*/ 0x00,
/*0x37*/ 0x00, /*0x38*/ 0x00, /*0x39*/ 0x00,
/*0x3A*/ 0x00, /*0x3B*/ 0x00, /*0x3C*/ 0xFF,
/*0x3D*/ 0x0F, /*0x3E*/ 0x00, /*0x3F*/ 0x00,
/*0x40*/ 0x01, /*0x41*/ 0x00, /*R_CSTAT*/ 0x80,
/*0x43*/ 0x03, /*R_LMP*/ 0x01, /*0x45*/ 0x00,
/*R_CTL*/ 0x39, /*0x47*/ 0x42, /*0x48*/ 0x15,
/*0x49*/ 0x96, /*0x4A*/ 0x8C };
/* ======================================================================
ReadNextGrayLine()
====================================================================== */
static TState ReadNextGrayLine(PTInstance this)
{
int iWrite;
int iDot;
unsigned char chBits;
int iRead; /* read position in raw line */
int nInterpolator;
iWrite=0;
while (iWrite<this->state.cxMax) /* max 1 time in reality */
{
while (iWrite<this->state.cxMax &&
this->state.iBulkReadPos<this->state.cchBulk)
this->state.ppchLines[0][iWrite++] += /* add! */
this->state.pchBuf[this->state.iBulkReadPos++]<<4;
if (iWrite<this->state.cxMax) /* we need an additional chunk */
{
if (this->state.bLastBulk)
return SANE_STATUS_EOF;
this->state.cchBulk=BulkReadBuffer(this,this->state.pchBuf,
USB_CHUNK_SIZE);
dprintf(DEBUG_SCAN,"bulk read: %d byte(s), line #%d\n",
this->state.cchBulk, this->state.iLine);
if (this->bWriteRaw)
fwrite(this->state.pchBuf,1,this->state.cchBulk,this->fhScan);
INST_ASSERT();
if (this->state.cchBulk!=USB_CHUNK_SIZE)
this->state.bLastBulk=true;
this->state.iBulkReadPos=0;
}
} /* while raw line buffer acquiring */
this->state.iLine++;
iDot=0; chBits=0; /* init pixelbuffer */
for (nInterpolator=50, iWrite=0, iRead=0;
iRead<this->state.cxMax;
iRead++)
{
nInterpolator+=this->state.nFixAspect;
if (nInterpolator<100) continue; /* res. reduction */
nInterpolator-=100;
if (iWrite>=this->state.cchLineOut) continue;
/* dprintf(DEBUG_SCAN," i=%d",iTo); */
if (this->mode==gray)
this->state.pchLineOut[iWrite++]=
this->state.ppchLines[0][iRead]>>4;
else
{
unsigned char chBit; /* 1=white */
if (this->mode==line)
chBit=(this->state.ppchLines[0][iRead]<LINE_THRESHOLD);
else
{
short nError=this->state.ppchLines[0][iRead];
/* printf("(%d)",nError); */
if (nError>=0xFF0)
{
nError-=0xFF0;
chBit=0;
}
else
chBit=1;
/* since I sketched the Floyd-Steinberg
algorithm from heart, I have no idea, if
there is room for improvement in the
coefficients. If You know, please drop
me a line (eichholz@computer.org, 1.4.2001) */
#define FASTDITHER
#ifdef FASTDITHER
this->state.ppchLines[0][iRead+1]+=(nError>>2); /* 8/16 */
this->state.ppchLines[1][iRead+1]+=(nError>>1);
this->state.ppchLines[1][iRead] +=(nError>>2); /* 8/16 */
#else
this->state.ppchLines[0][iRead+1]+=(nError*5)>>4;
this->state.ppchLines[1][iRead+1]+=(nError*8)>>4;
this->state.ppchLines[1][iRead] +=(nError*3)>>4;
#endif
}
chBits=(chBits<<1)|chBit;
iDot++;
if (iDot==8 && iWrite<this->state.cchLineOut)
{
this->state.pchLineOut[iWrite++]=chBits;
iDot=0; chBits=0;
}
} /* gray pixel postprocessing */
} /* line postprocessing */
if (iDot && iWrite<this->state.cchLineOut)
this->state.pchLineOut[iWrite++]=chBits;
/* cycle the history lines and clear the preread buffer*/
{
short *p=this->state.ppchLines[0];
this->state.ppchLines[0]=this->state.ppchLines[1];
this->state.ppchLines[1]=p;
memset(this->state.ppchLines[1],0,(this->state.cxMax+1)*sizeof(short));
}
return SANE_STATUS_GOOD;
}
/* ======================================================================
StartScanGray()
====================================================================== */
__SM3600EXPORT__
TState StartScanGray(TInstance *this)
{
unsigned char *puchRegs;
int i;
if (this->state.bScanning)
return SetError(this,SANE_STATUS_DEVICE_BUSY,"scan active");
memset(&(this->state),0,sizeof(TScanState));
this->state.ReadProc =ReadNextGrayLine;
puchRegs=NULL;
switch (this->param.res)
{
case 75: puchRegs=uchRegs075; break;
case 100: puchRegs=uchRegs100; break;
case 200: puchRegs=uchRegs200; break;
case 300: puchRegs=uchRegs300; break;
case 600: puchRegs=uchRegs600; break;
}
GetAreaSize(this);
this->state.cyTotalPath = this->param.y/2;
DoJog(this,this->state.cyTotalPath);
INST_ASSERT();
this->state.cyTotalPath += this->param.cy/2; /* for jogging back */
/*
regular scan is asynchronously, that is,
the scanning is issued, and the driver does bulk reads,
until there are no data left.
*/
RegWriteArray(this,R_ALL, NUM_SCANREGS, puchRegs); INST_ASSERT();
RegWrite(this,R_SPOS, 2,
this->param.x/2+this->calibration.xMargin); INST_ASSERT();
RegWrite(this,R_SLEN, 2, this->state.cyWindow); INST_ASSERT();
RegWrite(this,R_SWID, 2, this->state.cxWindow); INST_ASSERT();
RegWrite(this,R_STPS, 2, 0); INST_ASSERT();
/* upload gamma table */
RegWrite(this,0x41,1,0x01); /* gamma, gray */
RegWrite(this,0x40,1,0x20); /* FIFO at 0x08000 */
UploadGammaTable(this,0,this->agammaY); INST_ASSERT();
UploadGainCorrection(this, 0x2000);
INST_ASSERT();
/* for halftone dithering we need one history line */
this->state.pchBuf=malloc(USB_CHUNK_SIZE);
this->state.cBacklog=2;
this->state.ppchLines=calloc(this->state.cBacklog,sizeof(short *));
if (!this->state.pchBuf || !this->state.ppchLines)
return FreeState(this,SetError(this,
SANE_STATUS_NO_MEM,"no buffers available"));
for (i=0; i<this->state.cBacklog; i++)
{
this->state.ppchLines[i]=calloc(this->state.cxMax+1,
sizeof(short)); /* 1 dummy at right edge */
if (!this->state.ppchLines[i])
return FreeState(this,SetError(this,
SANE_STATUS_NO_MEM,"no buffers available"));
}
/* calculate and prepare intermediate line transfer buffer */
this->state.cchLineOut=(this->mode==gray)
? this->state.cxPixel
: (this->state.cxPixel+7)/8;
this->state.pchLineOut = malloc(this->state.cchLineOut);
if (!this->state.pchLineOut)
return FreeState(this,SetError(this,
SANE_STATUS_NO_MEM,
"no buffers available"));
/* start the unit, when all buffers are available */
RegWrite(this,R_CTL, 1, 0x39); INST_ASSERT();
RegWrite(this,R_CTL, 1, 0x79); INST_ASSERT();
RegWrite(this,R_CTL, 1, 0xF9); INST_ASSERT();
this->state.bScanning = true;
return SANE_STATUS_GOOD;
}
|
