Initial import of sane-backends version 1.0.24-1.2

1 files changed, 210 insertions, 0 deletions

diff --git a/backend/plustek-usbmap.c b/backend/plustek-usbmap.c
new file mode 100644
index 0000000..1e54789
--- /dev/null
+++ b/backend/plustek-usbmap.c
@@ -0,0 +1,210 @@
+/*.............................................................................
+ * Project : SANE library for Plustek flatbed scanners.
+ *.............................................................................
+ */
+
+/** @file plustek-usbmap.c
+ *  @brief Creating and manipulating lookup tables.
+ *
+ * Based on sources acquired from Plustek Inc.<br>
+ * Copyright (C) 2001-2007 Gerhard Jaeger <gerhard@gjaeger.de>
+ *
+ * History:
+ * - 0.40 - starting version of the USB support
+ * - 0.41 - fixed brightness problem for lineart mode
+ * - 0.42 - removed preset of linear gamma tables
+ * - 0.43 - no changes
+ * - 0.44 - map inversion for negatatives now only upon user request
+ * - 0.45 - no changes
+ * - 0.46 - no changes
+ * - 0.47 - cleanup work
+ * - 0.48 - added support for binary from color scans
+ * - 0.49 - changed usb_MapDownload
+ * - 0.50 - cleanup
+ * - 0.51 - no changes
+ * - 0.52 - no changes
+ * .
+ * <hr>
+ * 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.
+ * <hr>
+ */
+
+#define _MAP_SIZE 4096
+
+static SANE_Byte a_bMap[_MAP_SIZE * 3];
+
+/** adjust acording to brightness and contrast
+ */
+static void usb_MapAdjust( Plustek_Device *dev )
+{
+	int    i, tabLen;
+	double b, c, tmp;
+	
+	tabLen = _MAP_SIZE;
+
+	/* adjust brightness (b) and contrast (c) using the function:
+	 *
+	 * s(x,y) = (s(x,y) + b) * c
+	 * b = [-127, 127]
+	 * c = [0,2]
+	 */
+	b = ((double)dev->scanning.sParam.brightness * 192.0)/100.0;
+	c = ((double)dev->scanning.sParam.contrast   + 100.0)/100.0;
+
+	DBG( _DBG_INFO, "* brightness = %i -> %i\n",
+	                dev->scanning.sParam.brightness, (u_char)b);
+	DBG( _DBG_INFO, "* contrast   = %i -> %.3f\n",
+	                dev->scanning.sParam.contrast, c);
+
+	if( dev->scanning.sParam.brightness == 0 && dev->scanning.sParam.contrast )
+		return;
+
+	for( i = 0; i < tabLen; i++ ) {
+
+		tmp = ((double)(a_bMap[i] + b)) * c;
+		if( tmp < 0 )   tmp = 0;
+		if( tmp > 255 ) tmp = 255;
+		a_bMap[i] = (u_char)tmp;
+
+		tmp = ((double)(a_bMap[tabLen+i] + b)) * c;
+		if( tmp < 0 )   tmp = 0;
+		if( tmp > 255 ) tmp = 255;
+		a_bMap[tabLen+i] = (u_char)tmp;
+
+		tmp = ((double)(a_bMap[tabLen*2+i] + b)) * c;
+		if( tmp < 0 )   tmp = 0;
+		if( tmp > 255 ) tmp = 255;
+		a_bMap[tabLen*2+i] = (u_char)tmp;
+	}
+}
+
+/**
+ */
+static SANE_Bool usb_MapDownload( Plustek_Device *dev )
+{
+	ScanDef  *scanning = &dev->scanning;
+	DCapsDef *sc       = &dev->usbDev.Caps;
+
+	int       color;
+	int       i, threshold;
+	SANE_Byte value;
+	SANE_Bool fInverse = 0;
+	
+	DBG( _DBG_INFO, "usb_MapDownload()\n" );
+
+	/* the maps are have been already set */
+	
+	/* do the brightness and contrast adjustment ... */
+	if( scanning->sParam.bDataType != SCANDATATYPE_BW )
+		usb_MapAdjust( dev );
+
+	if( !usbio_WriteReg( dev->fd, 7, 0))
+		return SANE_FALSE;
+
+	/* we download all the time all three color maps, as we run
+	 * into trouble elsewhere on CanoScan models using gray mode
+	 */
+	for( color = 0; color < 3; color++) {
+	
+		/* select color */
+		value = (color << 2)+2;
+
+		/* set gamma color selector */
+		usbio_WriteReg( dev->fd, 0x03, value );
+		usbio_WriteReg( dev->fd, 0x04, 0 );
+		usbio_WriteReg( dev->fd, 0x05, 0 );
+
+		/* write the gamma table entry to merlin */
+		if((scanning->sParam.bDataType == SCANDATATYPE_BW) ||
+		   (scanning->fGrayFromColor > 7 )) {
+
+			threshold = (int)((double)scanning->sParam.brightness *
+			                                (_MAP_SIZE/200.0)) + (_MAP_SIZE/2);
+			threshold = _MAP_SIZE - threshold;
+			if(threshold < 0)
+				threshold = 0;
+			if(threshold > (int)_MAP_SIZE)
+				threshold = _MAP_SIZE;
+	
+			DBG(_DBG_INFO, "* Threshold is at %u brightness=%i\n",
+			               threshold, scanning->sParam.brightness );
+
+			for(i = 0; i < threshold; i++)
+				a_bMap[color*_MAP_SIZE + i] = 0;
+				
+			for(i = threshold; i < _MAP_SIZE; i++)
+				a_bMap[color*_MAP_SIZE + i] = 255;
+
+			fInverse = 1;
+
+		} else {
+			fInverse = 0;
+		}
+
+		if( /*scanning->dwFlag & SCANFLAG_Pseudo48 && */
+			(scanning->sParam.bSource == SOURCE_Negative) &&
+			(sc->workaroundFlag &_WAF_INV_NEGATIVE_MAP)) {
+			fInverse ^= 1;
+		}
+
+		if( fInverse ) {
+		
+			u_char  map[_MAP_SIZE];
+			u_char *pMap = a_bMap+color*_MAP_SIZE;
+			
+			DBG( _DBG_INFO, "* Inverting Map\n" );
+			
+			for( i = 0; i < _MAP_SIZE; i++, pMap++ )
+				map[i] = ~*pMap;
+			
+			sanei_lm983x_write( dev->fd,  0x06, map, _MAP_SIZE, SANE_FALSE );
+			
+		} else {
+			DBG( _DBG_INFO, "* downloading map %u...\n", color );
+			sanei_lm983x_write( dev->fd, 0x06, a_bMap+color*_MAP_SIZE,
+			                    _MAP_SIZE, SANE_FALSE );
+		}
+	
+	} /* for each color */
+
+	DBG( _DBG_INFO, "usb_MapDownload() done.\n" );
+	return SANE_TRUE;
+}
+
+/* END PLUSTEK-USBMAP.C .....................................................*/