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diff --git a/backend/sm3600-scanutil.c b/backend/sm3600-scanutil.c
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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
+
+$Id$
+
+====================================================================== */
+
+#include <unistd.h>
+#include "sm3600-scantool.h"
+
+/* **********************************************************************
+
+dprintf(DEBUG_XXXX, format, ...)
+
+Put a debug message on STDERR (or whatever). The message is prefixed with
+a "debug:" and given, if the current debugging flags contain the given
+flag "ulType".
+
+********************************************************************** */
+
+#ifdef INSANE_VERSION
+void DBG(int nLevel, const char *szFormat, ...)
+{
+ szFormat++;
+}
+#endif
+
+__SM3600EXPORT__
+void debug_printf(unsigned long ulType, const char *szFormat, ...)
+{
+ va_list ap;
+ if ((ulDebugMask & ulType)!=ulType) return;
+ if (*szFormat=='~')
+ szFormat++;
+ else
+ fprintf(stderr,"debug:");
+ va_start(ap,szFormat);
+ vfprintf(stderr,szFormat,ap);
+ va_end(ap);
+}
+
+/* **********************************************************************
+
+SetError(error, format, ...)
+
+The program is aborted, all handles and ressources are freed (this
+being global) and the user gets a nice panic screen :-)
+
+********************************************************************** */
+
+__SM3600EXPORT__
+int SetError(TInstance *this, int nError, const char *szFormat, ...)
+{
+ va_list ap;
+ if (this->nErrorState) return 0; /* do not overwrite error state */
+ this->nErrorState=nError;
+ this->szErrorReason=malloc(500);
+
+ if (szFormat!=NULL && this->szErrorReason)
+ {
+ va_start(ap,szFormat);
+ vsnprintf(this->szErrorReason,499,szFormat,ap);
+ va_end(ap);
+ this->szErrorReason[499]='\0';
+ }
+ return nError;
+}
+
+#ifdef INSANE_VERSION
+
+/* **********************************************************************
+
+DumpBuffer(fh,pch,cch)
+
+********************************************************************** */
+
+__SM3600EXPORT__
+void DumpBuffer(FILE *fh, const char *pch, int cch)
+{
+ int i=0;
+ while (i<cch)
+ {
+ if (!(i & 15))
+ {
+ if (i) fprintf(fh,"\n");
+ fprintf(fh,"%04X:",i);
+ }
+ fprintf(fh," %02X",(unsigned char)pch[i]);
+ i++;
+ }
+ fprintf(fh,"\n");
+}
+
+#endif
+
+/* **********************************************************************
+
+FreeState()
+
+Frees all dynamical memory for scan buffering.
+
+********************************************************************** */
+
+__SM3600EXPORT__
+TState FreeState(TInstance *this, TState nReturn)
+{
+ if (this->state.ppchLines)
+ {
+ int i;
+ for (i=0; i<this->state.cBacklog; i++)
+ {
+ if (this->state.ppchLines[i])
+ free(this->state.ppchLines[i]);
+ }
+ free(this->state.ppchLines);
+ }
+ if (this->state.pchLineOut) free(this->state.pchLineOut);
+ if (this->state.pchBuf) free(this->state.pchBuf);
+ this->state.pchBuf =NULL;
+ this->state.pchLineOut=NULL;
+ this->state.ppchLines =NULL;
+ return nReturn;
+}
+
+/* ======================================================================
+
+EndScan()
+
+====================================================================== */
+
+__SM3600EXPORT__
+TState EndScan(TInstance *this)
+{
+ if (!this->state.bScanning) return SANE_STATUS_GOOD;
+ /* move slider back to start */
+ this->state.bScanning=false;
+ FreeState(this,0);
+ INST_ASSERT();
+ return DoJog(this,-this->state.cyTotalPath);
+}
+
+/* ======================================================================
+
+TState CancelScan(TInstance *this)
+
+====================================================================== */
+
+__SM3600EXPORT__
+TState CancelScan(TInstance *this)
+{
+ TBool bCanceled;
+ DBG(DEBUG_INFO,"CancelScan() called\n");
+
+ this->state.cyTotalPath-=RegRead(this,R_POS,2);
+ DBG(DEBUG_JUNK,"stepping back %d steps\n",this->state.cyTotalPath);
+ /* this->state.cyTotalPath=0; */
+
+ usleep(200);
+ DoReset(this);
+ EndScan(this); /* and step back! */
+
+ DBG(DEBUG_JUNK,"cs4: %d\n",(int)this->nErrorState);
+ bCanceled=this->state.bCanceled;
+ this->state.bCanceled=false; /* re-enable Origination! */
+ if (!this->bOptSkipOriginate)
+ DoOriginate(this,false); /* have an error here... */
+ this->state.bCanceled=bCanceled;
+ DBG(DEBUG_JUNK,"cs5: %d\n",(int)this->nErrorState);
+ INST_ASSERT();
+ DBG(DEBUG_INFO,"cs6: ok.\n");
+ return SANE_STATUS_CANCELLED; /* or shall be say GOOD? */
+}
+
+
+/* ======================================================================
+
+ReadChunk()
+
+====================================================================== */
+
+__SM3600EXPORT__
+TState ReadChunk(TInstance *this, unsigned char *achOut,
+ int cchMax, int *pcchRead)
+{
+ /* have we to copy more than we have? */
+ /* can the current line fill the buffer ? */
+ int rc;
+ *pcchRead=0;
+ INST_ASSERT();
+ if (!this->state.bScanning)
+ return SANE_STATUS_CANCELLED; /* deferred cancel? */
+ if (this->state.bCanceled) /* deferred cancellation? */
+ return CancelScan(this);
+ INST_ASSERT();
+ /* 22.4.2001: This took me hard, harder, hardest:*/
+
+ /* We need to fill the line buffer with at least a *rest* of a
+ line. A single line will do. */
+ /* Thus, "iLine>0" is a suitable condition. */
+ /* Without the preread, there will a dummy line be read, if the
+ target buffer is large enough.*/
+ if (this->state.iLine)
+ rc=SANE_STATUS_GOOD;
+ else
+ rc=(*(this->state.ReadProc))(this); /* preread one line */
+ if (rc!=SANE_STATUS_GOOD) return rc;
+ dprintf(DEBUG_BUFFER,"Chunk-Init: cchMax = %d\n",cchMax);
+ while (this->state.iReadPos + cchMax > this->state.cchLineOut)
+ {
+ int cch;
+ /* copy rest of the line into target */
+ cch = this->state.cchLineOut - this->state.iReadPos;
+ memcpy(achOut,
+ this->state.pchLineOut+this->state.iReadPos,
+ cch);
+ cchMax-=cch; /* advance parameters */
+ achOut+=cch;
+ (*pcchRead)+=cch;
+ this->state.iReadPos=0;
+ rc=(*(this->state.ReadProc))(this);
+ dprintf(DEBUG_BUFFER,"Chunk-Read: cchMax = %d\n",cchMax);
+ if (rc!=SANE_STATUS_GOOD)
+ return rc; /* should be NOT(!) EOF, but then: good and away! */
+ }
+ dprintf(DEBUG_BUFFER,"Chunk-Exit: cchMax = %d\n",cchMax);
+ if (!cchMax) return SANE_STATUS_GOOD; /* now everything fits! */
+ (*pcchRead) += cchMax;
+ memcpy(achOut,
+ this->state.pchLineOut+this->state.iReadPos,
+ cchMax);
+ this->state.iReadPos += cchMax;
+ return SANE_STATUS_GOOD;
+}
+
+/* ======================================================================
+
+GetAreaSize()
+
+====================================================================== */
+
+__SM3600EXPORT__
+void GetAreaSize(TInstance *this)
+{
+ /* this->state.cxPixel : pixels, we *want* (after interpolation)
+ this->state.cxMax : pixels, we *need* (before interpolation) */
+ int nRefResX,nRefResY;
+ nRefResX=nRefResY=this->param.res;
+ switch (this->param.res)
+ {
+ case 75: nRefResX=100; this->state.nFixAspect=75; break;
+ default: this->state.nFixAspect=100; break;
+ }
+ this->state.cxPixel =this->param.cx*this->param.res/1200;
+ this->state.cyPixel =this->param.cy*this->param.res/1200;
+ this->state.cxMax =this->state.cxPixel*100/this->state.nFixAspect;
+ this->state.cxWindow =this->state.cxMax*600/nRefResX;
+ this->state.cyWindow =this->state.cyPixel*600/nRefResY;
+ dprintf(DEBUG_SCAN,"requesting %d[600] %d[real] %d[raw]\n",
+ this->state.cxWindow,this->state.cxPixel,this->state.cxMax);
+}
+
+/* ======================================================================
+
+ResetCalibration()
+
+Free calibration data. The Instance can be safely released afterwards.
+
+====================================================================== */
+
+__SM3600EXPORT__
+void ResetCalibration(TInstance *this)
+{
+ if (this->calibration.achStripeY)
+ free(this->calibration.achStripeY);
+ if (this->calibration.achStripeR)
+ free(this->calibration.achStripeR);
+ if (this->calibration.achStripeG)
+ free(this->calibration.achStripeG);
+ if (this->calibration.achStripeB)
+ free(this->calibration.achStripeB);
+ /* reset all handles, pointers, flags */
+ memset(&(this->calibration),0,sizeof(this->calibration));
+ /* TODO: type specific margins */
+ this->calibration.xMargin=200;
+ this->calibration.yMargin=0x019D;
+ this->calibration.nHoleGray=10;
+ this->calibration.rgbBias=0x888884;
+ this->calibration.nBarGray=0xC0;
+}
+
+/* ======================================================================
+
+InitGammaTables()
+
+Init gammy tables and gain tables within controller memory.
+
+====================================================================== */
+
+__SM3600EXPORT__
+TState InitGammaTables(TInstance *this, int nBrightness, int nContrast)
+{
+ long i;
+ long lOffset;
+ long lScale;
+ /* the rescaling is done with temporary zero translation to 2048 */
+ lOffset=(nBrightness-128)*16; /* signed! */
+ lScale=(nContrast+128)*100; /* in percent */
+ for (i=0; i<4096; i++)
+ {
+ int n=(int)((i+lOffset)*lScale/12800L+2048L);
+ if (n<0) n=0;
+ else if (n>4095) n=4095;
+ this->agammaY[i]=n;
+ this->agammaR[i]=n;
+ this->agammaG[i]=n;
+ this->agammaB[i]=n;
+ }
+ return SANE_STATUS_GOOD;
+}
+
+#ifdef INSANE_VERSION
+
+/* ======================================================================
+
+DoScanFile()
+
+Top level caller for scantool.
+
+====================================================================== */
+
+#define APP_CHUNK_SIZE 0x8000
+
+__SM3600EXPORT__
+TState DoScanFile(TInstance *this)
+{
+ int cx,cy;
+ long lcchRead;
+ TState rc;
+ char *achBuf;
+
+ achBuf=malloc(APP_CHUNK_SIZE);
+ rc=SANE_STATUS_GOOD; /* make compiler happy */
+ rc=InitGammaTables(this, this->param.nBrightness, this->param.nContrast);
+ if (rc!=SANE_STATUS_GOOD) return rc;
+ if (this->mode==color)
+ rc=StartScanColor(this);
+ else
+ rc=StartScanGray(this);
+ cx=this->state.cxPixel;
+ cy=this->state.cyPixel;
+ if (this->bVerbose)
+ fprintf(stderr,"scanning %d by %d\n",cx,cy);
+ if (this->fhScan && !this->bWriteRaw && !this->pchPageBuffer)
+ {
+ switch (this->mode)
+ {
+ case color: fprintf(this->fhScan,"P6\n%d %d\n255\n",cx,cy);
+ break;
+ case gray: fprintf(this->fhScan,"P5\n%d %d\n255\n",cx,cy);
+ break;
+ default: fprintf(this->fhScan,"P4\n%d %d\n",cx,cy);
+ break;
+ }
+ }
+ lcchRead=0L;
+ while (!rc)
+ {
+ int cch;
+ cch=0;
+ rc=ReadChunk(this,achBuf,APP_CHUNK_SIZE,&cch);
+ if (cch>0 && this->fhScan && cch<=APP_CHUNK_SIZE)
+ {
+ if (this->pchPageBuffer)
+ {
+#ifdef SM3600_DEBUGPAGEBUFFER
+ if (this->bVerbose)
+ fprintf(stderr,"ichPageBuffer:%d, cch:%d, cchPageBuffer:%d\n",
+ this->ichPageBuffer,cch,this->cchPageBuffer);
+#endif
+ CHECK_ASSERTION(this->ichPageBuffer+cch<=this->cchPageBuffer);
+ memcpy(this->pchPageBuffer+this->ichPageBuffer,
+ achBuf,cch);
+ this->ichPageBuffer+=cch;
+ }
+ else if (!this->bWriteRaw)
+ fwrite(achBuf,1,cch,this->fhScan);
+ lcchRead+=cch;
+ }
+ }
+ free(achBuf);
+ if (this->bVerbose)
+ fprintf(stderr,"read %ld image byte(s)\n",lcchRead);
+ EndScan(this);
+ INST_ASSERT();
+ return SANE_STATUS_GOOD;
+}
+
+#endif
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