/* sane - Scanner Access Now Easy. Copyright (C) 1996, 1997 David Mosberger-Tang 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. This file implements a dynamic linking based SANE meta backend. It allows managing an arbitrary number of SANE backends by using dynamic linking to load backends on demand. */ /* ====================================================================== 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 (iWritestate.cxMax) /* max 1 time in reality */ { while (iWritestate.cxMax && this->state.iBulkReadPosstate.cchBulk) this->state.ppchLines[0][iWrite++] += /* add! */ this->state.pchBuf[this->state.iBulkReadPos++]<<4; if (iWritestate.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(); FixExposure(this->state.pchBuf,this->state.cchBulk, this->param.nBrightness, this->param.nContrast); 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; iReadstate.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]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 && iWritestate.cchLineOut) { this->state.pchLineOut[iWrite++]=chBits; iDot=0; chBits=0; } } /* gray pixel postprocessing */ } /* line postprocessing */ if (iDot && iWritestate.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() ====================================================================== */ static 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(); /* upload gamma table */ RegWrite(this,0x41,1,0x01); /* gamma, gray */ RegWrite(this,0x40,1,0x08); /* offset FIFO 8 KB spared */ UploadGammaTable(this,0,this->agammaGray); 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; istate.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; }