Initial import of sane-backends version 1.0.24-1.2

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_ */