kopia lustrzana https://gitlab.com/sane-project/backends
311 wiersze
12 KiB
C
311 wiersze
12 KiB
C
/* sane - Scanner Access Now Easy.
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Copyright (C) Marian Eichholz 2001
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This file is part of the SANE package.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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As a special exception, the authors of SANE give permission for
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additional uses of the libraries contained in this release of SANE.
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The exception is that, if you link a SANE library with other files
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to produce an executable, this does not by itself cause the
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resulting executable to be covered by the GNU General Public
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License. Your use of that executable is in no way restricted on
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account of linking the SANE library code into it.
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This exception does not, however, invalidate any other reasons why
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the executable file might be covered by the GNU General Public
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License.
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If you submit changes to SANE to the maintainers to be included in
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a subsequent release, you agree by submitting the changes that
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those changes may be distributed with this exception intact.
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If you write modifications of your own for SANE, it is your choice
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whether to permit this exception to apply to your modifications.
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If you do not wish that, delete this exception notice.
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*/
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/* ======================================================================
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Userspace scan tool for the Microtek 3600 scanner
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color scan routine
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(C) Marian Eichholz 2001
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====================================================================== */
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#include "sm3600-scantool.h"
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#define ORDER_RGB "012"
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#define ORDER_BRG "120"
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/* **********************************************************************
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ReadNextColorLine()
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********************************************************************** */
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static TState ReadNextColorLine(PTInstance this)
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{
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int iWrite,i;
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int iRead; /* read position in raw line */
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int nInterpolator;
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int iOffsetR,iOffsetG,iOffsetB;
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short *pchLineSwap;
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TBool bVisible;
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bVisible=false;
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do {
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iWrite=0;
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while (iWrite<3*this->state.cxMax) /* max 1 time in reality */
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{
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while (iWrite<3*this->state.cxMax &&
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this->state.iBulkReadPos<this->state.cchBulk)
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this->state.ppchLines[0][iWrite++] =
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this->state.pchBuf[this->state.iBulkReadPos++];
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if (iWrite<3*this->state.cxMax) /* we need an additional chunk */
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{
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if (this->state.bLastBulk)
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return SANE_STATUS_EOF;
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this->state.cchBulk=BulkReadBuffer(this,this->state.pchBuf,
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USB_CHUNK_SIZE);
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dprintf(DEBUG_SCAN,"bulk read: %d byte(s), line #%d\n",
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this->state.cchBulk, this->state.iLine);
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if (this->bWriteRaw)
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fwrite(this->state.pchBuf,1,this->state.cchBulk,this->fhScan);
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INST_ASSERT();
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if (this->state.cchBulk!=USB_CHUNK_SIZE)
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this->state.bLastBulk=true;
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this->state.iBulkReadPos=0;
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}
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} /* while raw line buffer acquiring */
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this->state.iLine++;
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if (this->state.iLine>2*this->state.ySensorSkew)
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{
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bVisible=true;
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iOffsetR=(this->state.szOrder[0]-'0')*this->state.cxMax;
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iOffsetG=(this->state.szOrder[1]-'0')*this->state.cxMax;
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iOffsetB=(this->state.szOrder[2]-'0')*this->state.cxMax;
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for (nInterpolator=100, iWrite=0, iRead=0;
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iRead<3*this->state.cxMax && iWrite<this->state.cchLineOut;
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iRead++)
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{
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nInterpolator+=this->state.nFixAspect;
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if (nInterpolator<100) continue; /* res. reduction */
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nInterpolator-=100;
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/* dprintf(DEBUG_SCAN," i=%d",iTo); */
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/* the first scan lines only fill the line backlog buffer */
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{
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/* dprintf(DEBUG_SCAN,"assembling line %d\n",++this->state.iLine); */
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this->state.pchLineOut[iWrite++]=
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this->state.ppchLines[2*this->state.ySensorSkew][iRead+iOffsetR];
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this->state.pchLineOut[iWrite++]=
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this->state.ppchLines[1*this->state.ySensorSkew][iRead+iOffsetG];
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this->state.pchLineOut[iWrite++]=
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this->state.ppchLines[0*this->state.ySensorSkew][iRead+iOffsetB];
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}
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}
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} /* if visible line */
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/* cycle backlog buffers */
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pchLineSwap=this->state.ppchLines[this->state.cBacklog-1];
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for (i=this->state.cBacklog-2; i>=0; i--)
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this->state.ppchLines[i+1]=this->state.ppchLines[i];
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this->state.ppchLines[0]=pchLineSwap;
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} while (!bVisible);
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return SANE_STATUS_GOOD;
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}
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/* ======================================================================
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StartScanColor()
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====================================================================== */
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/* Parameter are in resolution units! */
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__SM3600EXPORT__
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TState StartScanColor(TInstance *this)
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{
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/* live could be easy: Simple calculate a window, start the scan,
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get the data and get off. It dimply does not work. We have to
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deal with the fact, that the pixels are reported with color scan
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line by color scan line, and have to be rearranged to RGB
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triples. They even ar enot always in RGB order, but mostly in BRG
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order. And they have a skew of 2/300 inch , given by the slider
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construction. Thus, we have to deal with several buffers, some
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interpolation, and related management stuff. */
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int i;
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if (this->state.bScanning)
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return SetError(this,SANE_STATUS_DEVICE_BUSY,"scan active");
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memset(&(this->state),0,sizeof(this->state));
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this->state.ReadProc =ReadNextColorLine;
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this->state.ySensorSkew=0;
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GetAreaSize(this);
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switch (this->param.res)
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{
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case 200: this->state.ySensorSkew=1; break;
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case 300: this->state.ySensorSkew=2; break;
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case 600: this->state.ySensorSkew=4; break;
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default: break;
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}
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/* since we need 2*this->state.ySensorSkew additional scan lines for de-skewing of
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the sensor lines, we enlarge the window and shorten the initial movement
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accordingly */
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this->state.cyTotalPath =
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this->param.y/2-(2*this->state.ySensorSkew)*600/this->param.res;
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DoJog(this,this->state.cyTotalPath); INST_ASSERT();
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this->state.cyTotalPath +=
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(this->state.cyPixel+2*this->state.ySensorSkew)
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*600/this->param.res; /* for jogging back */
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/*
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regular scan is asynchronously, that is,
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the scanning is issued, and the driver does bulk reads,
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until there are no data left.
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Each line has a full R, G and B subline, 8bit each sample.
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*/
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{
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unsigned char uchRegs[]={
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0xFC /*!!R_SPOS!!*/, 0x00 /*R_SPOSH*/, 0x24 /*!!0x03!!*/,
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0xB0 /*!!R_SWID!!*/, 0xC4 /*!!R_SWIDH!!*/,
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1,0,
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0xFF /*!!0x08!!*/, 0xFF /*!!0x09!!*/,
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0x22 /*!!R_LEN!!*/, 0x07 /*!!R_LENH!!*/, 0x6D /*0x0C*/,
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0x70 /*0x0D*/, 0x69 /*0x0E*/, 0xD0 /*0x0F*/,
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0x00 /*0x10*/, 0x00 /*0x11*/, 0x42 /*!!0x12!!*/,
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0x15 /*0x13*/, 0x84 /*!!0x14!!*/, 0x2A /*0x15*/,
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0xC5 /*!!0x16!!*/, 0x40 /*0x17*/, 0xC5 /*!!0x18!!*/,
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0x40 /*0x19*/, 0xFF /*0x1A*/, 0x01 /*0x1B*/,
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0x88 /*0x1C*/, 0x40 /*0x1D*/, 0x4C /*0x1E*/,
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0x50 /*0x1F*/, 0x00 /*0x20*/, 0x0C /*0x21*/,
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0x21 /*0x22*/, 0xF0 /*0x23*/, 0x40 /*0x24*/,
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0x00 /*0x25*/, 0x0A /*0x26*/, 0xF0 /*0x27*/,
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0x00 /*0x28*/, 0x00 /*0x29*/, 0x4E /*0x2A*/,
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0xF0 /*0x2B*/, 0x00 /*0x2C*/, 0x00 /*0x2D*/,
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0x4E /*0x2E*/, 0x80 /*R_CCAL*/, 0x80 /*R_CCAL2*/,
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0x80 /*R_CCAL3*/, 0x0B /*0x32*/, 0x2D /*0x33*/,
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0x43 /*!!0x34!!*/, 0x29 /*0x35*/, 0x00 /*0x36*/,
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0x00 /*0x37*/, 0x00 /*0x38*/, 0x00 /*0x39*/,
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0x00 /*0x3A*/, 0x00 /*0x3B*/, 0xFF /*0x3C*/,
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0x0F /*0x3D*/, 0x00 /*0x3E*/, 0x00 /*0x3F*/,
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0x01 /*0x40*/, 0x00 /*0x41*/, 0x80 /*R_CSTAT*/,
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0x03 /*0x43*/, 0x01 /*R_LMP*/, 0x00 /*0x45*/,
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0x39 /*R_CTL*/, 0xC5 /*!!0x47!!*/, 0x40 /*0x48*/,
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0x9E /*0x49*/, 0x8C /*0x4A*/ };
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RegWriteArray(this,R_ALL, NUM_SCANREGS, uchRegs);
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RegWrite(this,R_SPOS, 2, this->param.x/2 + this->calibration.xMargin);
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RegWrite(this,R_SLEN, 2,
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this->state.cyWindow+
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(2*this->state.ySensorSkew)*600/this->param.res);
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this->state.szOrder=ORDER_BRG;
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RegWrite(this,R_CCAL, 3, this->calibration.rgbBias); INST_ASSERT(); /* 0xBBGGRR */
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switch (this->param.res)
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{
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case 75:
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RegWrite(this,R_XRES,1, 0x20); /* ups, can do only 100 dpi horizontal */
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RegWrite(this,R_SWID, 2, 0xC000 | this->state.cxWindow);
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RegWrite(this,0x34, 1, 0x83); /* halves the vertical resolution */
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RegWrite(this,0x47,1,0xC0); /* reduces the speed a bit */
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break;
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case 100:
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RegWrite(this,R_XRES,1, 0x20);
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RegWrite(this,R_SWID, 2, 0xC000 | this->state.cxWindow);
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RegWrite(this,0x34, 1, 0x63); /* halves the vertical resolution */
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RegWrite(this,0x47,1,0xC0); /* reduces the speed a bit */
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/* I have no idea, what these differences are good for. The seem to produce
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a slight blue presence.
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RegWrite(this,0x16, 1, 0xC0); RegWrite(this,0x18, 1, 0xC0);
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RegWrite(this,0x12, 1, 0x40); RegWrite(this,0x10, 2, 0x0728);
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RegWrite(this,0x14, 1, 0x80); */
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break;
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case 200:
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RegWrite(this,R_XRES,1, 0x24);
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RegWrite(this,R_SWID, 2, 0xC000 | this->state.cxWindow);
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break;
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case 300:
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RegWrite(this,0x08,2, 0x6A6A);
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RegWrite(this,R_XRES,1, 0x2A);
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RegWrite(this,R_SWID, 2, 0x4000 | this->state.cxWindow);
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RegWrite(this,0x34, 1, 0x03); /* halves the vertical resolution */
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RegWrite(this,0x47,1,0xC0); /* reduces the speed a bit */
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this->state.szOrder=ORDER_RGB;
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break;
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case 600:
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RegWrite(this,R_XRES,1, 0x3F);
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RegWrite(this,R_SWID, 2, 0xC000 | this->state.cxWindow);
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RegWrite(this,0x34, 1, 0x03); /* halves the vertical resolution */
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RegWrite(this,0x47,1,0xC2); /* reduces the speed a bit */
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break;
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case 1200:
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/* not supported, since the driver supports only 600 dpi in color */
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break;
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}
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}
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/* setup gamma tables */
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RegWrite(this,0x41,1,0x03); /* gamma, RGB */
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RegWrite(this,0x40,1,0x28); /* offset FIFO 8*3 (GAMMA)+16 KB(gain) spared */
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/*
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hey, surprise: Although the color lines are sent in a strange order,
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the gamma tables are mapped constantly to the sensors (i.e. RGB)
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*/
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UploadGammaTable(this,0x0000,this->agammaR);
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UploadGammaTable(this,0x2000,this->agammaG);
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UploadGammaTable(this,0x4000,this->agammaB);
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INST_ASSERT();
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UploadGainCorrection(this,0x6000);
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INST_ASSERT();
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/* enough for 1/100 inch sensor distance */
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this->state.cBacklog=1+2*this->state.ySensorSkew;
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/* allocate raw line buffers */
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this->state.ppchLines=calloc(this->state.cBacklog,sizeof(short*));
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this->state.pchBuf=malloc(0x8000);
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if (!this->state.ppchLines || !this->state.pchBuf)
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return FreeState(this,SetError(this,
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SANE_STATUS_NO_MEM,"no buffers available"));
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for (i=0; i<this->state.cBacklog; i++)
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{
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this->state.ppchLines[i]=calloc(1,3*this->state.cxMax*sizeof(short)); /* must be less than 0x8000 */
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if (!this->state.ppchLines[i])
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return FreeState(this,
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SetError(this,SANE_STATUS_NO_MEM,
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"no line buffer available"));
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}
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/* calculate and prepare intermediate line transfer buffer */
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this->state.cchLineOut=3*this->state.cxPixel;
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this->state.pchLineOut = malloc(this->state.cchLineOut);
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if (!this->state.pchLineOut)
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return FreeState(this,SetError(this,
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SANE_STATUS_NO_MEM,
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"no buffers available"));
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RegWrite(this,R_CTL, 1, 0x39); /* #1532[005.0] */
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RegWrite(this,R_CTL, 1, 0x79); /* #1533[005.0] */
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RegWrite(this,R_CTL, 1, 0xF9); /* #1534[005.0] */
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INST_ASSERT();
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this->state.bScanning = true;
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return SANE_STATUS_GOOD;
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}
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