kopia lustrzana https://gitlab.com/sane-project/backends
137 wiersze
4.7 KiB
C
137 wiersze
4.7 KiB
C
/*
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Copyright (C) 2001 Bertrik Sikken (bertrik@zonnet.nl)
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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
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU 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, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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$Id$
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*/
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/*
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Core NIASH chip functions.
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*/
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#ifndef _NIASH_CORE_H_
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#define _NIASH_CORE_H_
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#include <unistd.h>
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#include "niash_xfer.h" /* for EScannerModel */
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#define HP3300C_RIGHT 330
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#define HP3300C_TOP 452
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#define HP3300C_BOTTOM (HP3300C_TOP + 14200UL)
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#define HW_PIXELS 5300 /* number of pixels supported by hardware */
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#define HW_DPI 600 /* horizontal resolution of hardware */
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#define HW_LPI 1200 /* vertical resolution of hardware */
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#define BYTES_PER_PIXEL 3
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typedef struct
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{
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int iXferHandle; /* handle used for data transfer to HW */
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int iTopLeftX; /* in mm */
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int iTopLeftY; /* in mm */
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int iSensorSkew; /* in units of 1/1200 inch */
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int iSkipLines; /* lines of garbage to skip */
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SANE_Bool fReg07; /* NIASH00019 */
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SANE_Bool fGamma16; /* if TRUE, gamma entries are 16 bit */
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int iExpTime;
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SANE_Bool iReversedHead; /* Head is reversed */
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int iBufferSize; /* Size of internal scan buffer */
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EScannerModel eModel;
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} THWParams;
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typedef struct
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{
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int iDpi; /* horizontal resolution */
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int iLpi; /* vertical resolution */
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int iTop; /* in HW coordinates */
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int iLeft; /* in HW coordinates */
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int iWidth; /* pixels */
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int iHeight; /* lines */
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int iBottom;
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int fCalib; /* if TRUE, disable backtracking? */
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} TScanParams;
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typedef struct
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{
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unsigned char *pabXferBuf; /* transfer buffer */
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int iCurLine; /* current line in the transfer buffer */
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int iBytesPerLine; /* unsigned chars in one scan line */
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int iLinesPerXferBuf; /* number of lines held in the transfer buffer */
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int iLinesLeft; /* transfer (down) counter for pabXFerBuf */
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int iSaneBytesPerLine; /* how many unsigned chars to be read by SANE per line */
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int iScaleDownDpi; /* factors used to emulate lower resolutions */
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int iScaleDownLpi; /* than those offered by hardware */
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int iSkipLines; /* line to skip at the start of scan */
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int iWidth; /* number of pixels expected by SANE */
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unsigned char *pabCircBuf; /* circular buffer */
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int iLinesPerCircBuf; /* lines held in the circular buffer */
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int iRedLine, iGrnLine, /* start indices for the color information */
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iBluLine; /* in the circular buffer */
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unsigned char *pabLineBuf; /* buffer used to pass data to SANE */
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} TDataPipe;
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STATIC int NiashOpen (THWParams * pHWParams, const char *pszName);
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STATIC void NiashClose (THWParams * pHWParams);
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/* more sof. method that also returns the values of the white (RGB) value */
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STATIC SANE_Bool SimpleCalibExt (THWParams * pHWPar,
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unsigned char *pabCalibTable,
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unsigned char *pabCalWhite);
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STATIC SANE_Bool GetLamp (THWParams * pHWParams, SANE_Bool * pfLampIsOn);
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STATIC SANE_Bool SetLamp (THWParams * pHWParams, SANE_Bool fLampOn);
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STATIC SANE_Bool InitScan (TScanParams * pParams, THWParams * pHWParams);
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STATIC void FinishScan (THWParams * pHWParams);
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STATIC void CalcGamma (unsigned char *pabTable, double Gamma);
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STATIC void WriteGammaCalibTable (unsigned char *pabGammaR,
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unsigned char *pabGammaG,
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unsigned char *pabGammaB,
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unsigned char *pabCalibTable, int iGain,
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int iOffset, THWParams * pHWPar);
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/* set -1 for iHeight to disable all checks on buffer transfers */
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/* iWidth is in pixels of SANE */
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/* iHeight is lines in scanner resolution */
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STATIC void CircBufferInit (int iHandle, TDataPipe * p,
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int iWidth, int iHeight,
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int iMisAlignment, SANE_Bool iReversedHead,
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int iScaleDownDpi, int iScaleDownLpi);
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/* returns false, when trying to read after end of buffer */
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STATIC SANE_Bool CircBufferGetLine (int iHandle, TDataPipe * p,
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unsigned char *pabLine,
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SANE_Bool iReversedHead);
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/* returns false, when trying to read after end of buffer
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if fReturn==SANE_TRUE, the head will return automatically on an end of scan */
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STATIC SANE_Bool
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CircBufferGetLineEx (int iHandle, TDataPipe * p, unsigned char *pabLine,
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SANE_Bool iReversedHead, SANE_Bool fReturn);
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STATIC void CircBufferExit (TDataPipe * p);
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#endif /* _NIASH_CORE_H_ */
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