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authorJörg Frings-Fürst <debian@jff-webhosting.net>2014-10-06 14:00:40 +0200
committerJörg Frings-Fürst <debian@jff-webhosting.net>2014-10-06 14:00:40 +0200
commit6e9c41a892ed0e0da326e0278b3221ce3f5713b8 (patch)
tree2e301d871bbeeb44aa57ff9cc070fcf3be484487 /backend/niash_core.h
Initial import of sane-backends version 1.0.24-1.2
Diffstat (limited to 'backend/niash_core.h')
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diff --git a/backend/niash_core.h b/backend/niash_core.h
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+/*
+ 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_ */