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Diffstat (limited to 'backend/niash_core.h')
| -rw-r--r-- | backend/niash_core.h | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/backend/niash_core.h b/backend/niash_core.h new file mode 100644 index 0000000..9bd6b91 --- /dev/null +++ b/backend/niash_core.h @@ -0,0 +1,136 @@ +/* + Copyright (C) 2001 Bertrik Sikken (bertrik@zonnet.nl) + + 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. + + $Id$ +*/ + +/* + Core NIASH chip functions. +*/ + + +#ifndef _NIASH_CORE_H_ +#define _NIASH_CORE_H_ + +#include <unistd.h> + +#include "niash_xfer.h" /* for EScannerModel */ + +#define HP3300C_RIGHT 330 +#define HP3300C_TOP 452 +#define HP3300C_BOTTOM (HP3300C_TOP + 14200UL) + +#define HW_PIXELS 5300 /* number of pixels supported by hardware */ +#define HW_DPI 600 /* horizontal resolution of hardware */ +#define HW_LPI 1200 /* vertical resolution of hardware */ + +#define BYTES_PER_PIXEL 3 + +typedef struct +{ + int iXferHandle; /* handle used for data transfer to HW */ + int iTopLeftX; /* in mm */ + int iTopLeftY; /* in mm */ + int iSensorSkew; /* in units of 1/1200 inch */ + int iSkipLines; /* lines of garbage to skip */ + SANE_Bool fReg07; /* NIASH00019 */ + SANE_Bool fGamma16; /* if TRUE, gamma entries are 16 bit */ + int iExpTime; + SANE_Bool iReversedHead; /* Head is reversed */ + int iBufferSize; /* Size of internal scan buffer */ + EScannerModel eModel; +} THWParams; + + +typedef struct +{ + int iDpi; /* horizontal resolution */ + int iLpi; /* vertical resolution */ + int iTop; /* in HW coordinates */ + int iLeft; /* in HW coordinates */ + int iWidth; /* pixels */ + int iHeight; /* lines */ + int iBottom; + + int fCalib; /* if TRUE, disable backtracking? */ +} TScanParams; + + +typedef struct +{ + unsigned char *pabXferBuf; /* transfer buffer */ + int iCurLine; /* current line in the transfer buffer */ + int iBytesPerLine; /* unsigned chars in one scan line */ + int iLinesPerXferBuf; /* number of lines held in the transfer buffer */ + int iLinesLeft; /* transfer (down) counter for pabXFerBuf */ + int iSaneBytesPerLine; /* how many unsigned chars to be read by SANE per line */ + int iScaleDownDpi; /* factors used to emulate lower resolutions */ + int iScaleDownLpi; /* than those offered by hardware */ + int iSkipLines; /* line to skip at the start of scan */ + int iWidth; /* number of pixels expected by SANE */ + unsigned char *pabCircBuf; /* circular buffer */ + int iLinesPerCircBuf; /* lines held in the circular buffer */ + int iRedLine, iGrnLine, /* start indices for the color information */ + iBluLine; /* in the circular buffer */ + unsigned char *pabLineBuf; /* buffer used to pass data to SANE */ +} TDataPipe; + + +STATIC int NiashOpen (THWParams * pHWParams, const char *pszName); +STATIC void NiashClose (THWParams * pHWParams); + +/* more sof. method that also returns the values of the white (RGB) value */ +STATIC SANE_Bool SimpleCalibExt (THWParams * pHWPar, + unsigned char *pabCalibTable, + unsigned char *pabCalWhite); + +STATIC SANE_Bool GetLamp (THWParams * pHWParams, SANE_Bool * pfLampIsOn); +STATIC SANE_Bool SetLamp (THWParams * pHWParams, SANE_Bool fLampOn); + +STATIC SANE_Bool InitScan (TScanParams * pParams, THWParams * pHWParams); +STATIC void FinishScan (THWParams * pHWParams); + +STATIC void CalcGamma (unsigned char *pabTable, double Gamma); +STATIC void WriteGammaCalibTable (unsigned char *pabGammaR, + unsigned char *pabGammaG, + unsigned char *pabGammaB, + unsigned char *pabCalibTable, int iGain, + int iOffset, THWParams * pHWPar); + +/* set -1 for iHeight to disable all checks on buffer transfers */ +/* iWidth is in pixels of SANE */ +/* iHeight is lines in scanner resolution */ +STATIC void CircBufferInit (int iHandle, TDataPipe * p, + int iWidth, int iHeight, + int iMisAlignment, SANE_Bool iReversedHead, + int iScaleDownDpi, int iScaleDownLpi); + +/* returns false, when trying to read after end of buffer */ +STATIC SANE_Bool CircBufferGetLine (int iHandle, TDataPipe * p, + unsigned char *pabLine, + SANE_Bool iReversedHead); + +/* returns false, when trying to read after end of buffer + if fReturn==SANE_TRUE, the head will return automatically on an end of scan */ + +STATIC SANE_Bool +CircBufferGetLineEx (int iHandle, TDataPipe * p, unsigned char *pabLine, + SANE_Bool iReversedHead, SANE_Bool fReturn); + +STATIC void CircBufferExit (TDataPipe * p); + +#endif /* _NIASH_CORE_H_ */ |