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sane-project-backends/backend/u12-image.c

907 wiersze
26 KiB
C
Czysty Bezpośredni odnośnik Wina Historia

/* @file u12_image.c
* @brief functions to convert scanner data into image data
*
* based on sources acquired from Plustek Inc.
* Copyright (c) 2003-2004 Gerhard Jaeger <gerhard@gjaeger.de>
*
* History:
* - 0.01 - initial version
* - 0.02 - fixed fnColor42() to return 16bit values instead of
* only 12bit (this is the maximum the scanner can)
* - added scaling function u12image_ScaleX()
* .
* <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, see <https://www.gnu.org/licenses/>.
*
* 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>
*/
/*************************** local vars **************************************/
static u_short wPreviewScanned = 0;
static ExpXStepDef negScan[5] = {
{128, 8}, {96, 12}, {96, 24}, {96, 48}, {96, 96}
};
static ExpXStepDef posScan[5] = {
{128, 8}, {96, 12}, {96, 24}, {96, 48}, {96, 96}
};
static ExpXStepDef nmlScan[5] = {
{160, 10}, {96, 12}, {96, 24}, {96, 48}, {96, 96},
};
/*************************** local functions *********************************/
/**
*/
static SANE_Bool fnReadToDriver( U12_Device *dev )
{
dev->regs.RD_ModeControl = _ModeFifoBSel;
u12io_ReadMonoData( dev, dev->scan.BufPut.blue.bp,
dev->DataInf.dwAsicBytesPerPlane );
dev->regs.RD_ModeControl = _ModeFifoGSel;
u12io_ReadMonoData( dev, dev->scan.BufPut.green.bp,
dev->DataInf.dwAsicBytesPerPlane );
if( dev->scan.gd_gk.wGreenKeep )
dev->scan.gd_gk.wGreenKeep--;
else {
dev->scan.BufPut.green.bp += dev->DataInf.dwAsicBytesPerPlane;
if( dev->scan.BufPut.green.bp >= dev->scan.BufEnd.green.bp )
dev->scan.BufPut.green.bp = dev->scan.BufBegin.green.bp;
}
dev->regs.RD_ModeControl = _ModeFifoRSel;
u12io_ReadMonoData( dev, dev->scan.BufPut.red.bp,
dev->DataInf.dwAsicBytesPerPlane );
dev->scan.BufPut.red.bp += dev->DataInf.dwAsicBytesPerPlane;
if( dev->scan.BufPut.red.bp >= dev->scan.BufEnd.red.bp )
dev->scan.BufPut.red.bp = dev->scan.BufBegin.red.bp;
if( dev->scan.bd_rk.wRedKeep ) {
dev->scan.bd_rk.wRedKeep--;
return SANE_FALSE;
} else {
dev->scan.BufData.green.bp = dev->scan.BufGet.green.bp;
dev->scan.BufData.red.bp = dev->scan.BufGet.red.bp;
dev->scan.BufData.blue.bp = dev->scan.BufGet.blue.bp;
dev->scan.BufGet.red.bp += dev->DataInf.dwAsicBytesPerPlane;
dev->scan.BufGet.green.bp += dev->DataInf.dwAsicBytesPerPlane;
if( dev->scan.BufGet.red.bp >= dev->scan.BufEnd.red.bp )
dev->scan.BufGet.red.bp = dev->scan.BufBegin.red.bp;
if( dev->scan.BufGet.green.bp >= dev->scan.BufEnd.green.bp )
dev->scan.BufGet.green.bp = dev->scan.BufBegin.green.bp;
return SANE_TRUE;
}
}
/**
*/
static SANE_Bool fnReadOutScanner( U12_Device *dev )
{
if( dev->scan.bd_rk.wBlueDiscard ) {
dev->scan.bd_rk.wBlueDiscard--;
dev->regs.RD_ModeControl = _ModeFifoBSel;
u12io_ReadMonoData( dev, dev->bufs.b1.pReadBuf,
dev->DataInf.dwAsicBytesPerPlane );
if( dev->scan.gd_gk.wGreenDiscard ) {
dev->scan.gd_gk.wGreenDiscard--;
dev->regs.RD_ModeControl = _ModeFifoGSel;
u12io_ReadMonoData( dev, dev->bufs.b1.pReadBuf,
dev->DataInf.dwAsicBytesPerPlane );
}
return SANE_FALSE;
} else {
u12io_ReadColorData( dev, dev->bufs.b1.pReadBuf,
dev->DataInf.dwAsicBytesPerPlane );
return SANE_TRUE;
}
}
/** some sampling functions
*/
static SANE_Bool fnEveryLine( U12_Device *dev )
{
_VAR_NOT_USED( dev );
return SANE_TRUE;
}
static SANE_Bool fnSampleLines( U12_Device *dev )
{
dev->DataInf.wYSum += dev->DataInf.xyAppDpi.y;
if( dev->DataInf.wYSum >= dev->DataInf.xyPhyDpi.y ) {
dev->DataInf.wYSum -= dev->DataInf.xyPhyDpi.y;
return SANE_TRUE;
}
return SANE_FALSE;
}
static SANE_Bool fnSamplePreview( U12_Device *dev )
{
dev->DataInf.wYSum += wPreviewScanned;
if( dev->DataInf.wYSum >= 150 ) {
dev->DataInf.wYSum -= 150;
return SANE_TRUE;
}
return SANE_FALSE;
}
/** this function is used when
* - the data type is B/W or GrayScale.
* - the required horizontal resolution doesn't exceed the optic spec.
* - the required vertical resolution exceeds the optic spec.
*/
static void fnDataDirect( U12_Device *dev, void *src, void *dest, u_long len )
{
_VAR_NOT_USED( dev );
memcpy( dest, src, len );
}
/** merges the color planes to pixels style without enlarge operation.
*/
static void fnColorDirect( U12_Device *dev, void *pb, void *img, u_long len )
{
SANE_Byte *src;
RGBByteDef *dest;
src = (SANE_Byte*)img;
dest = (RGBByteDef*)pb;
for ( len = dev->DataInf.dwAsicPixelsPerPlane; len; len--, src++, dest++) {
dest->Red = *src;
dest->Green = src[dev->DataInf.dwAsicPixelsPerPlane];
dest->Blue = src[dev->DataInf.dwAsicPixelsPerPlane*2];
}
}
/** merges the color planes to pixels style without enlarge operation.
* The scanner returns the pixel data in Motorola-Format, so we have to swap
* (at least on x86)
*/
static void fnColor42( U12_Device *dev, void *pb, void *img, u_long len )
{
u_short *src;
RGBUShortDef *dest;
register u_long i;
_VAR_NOT_USED( len );
src = (u_short*)img;
dest = (RGBUShortDef*)pb;
for ( i = dev->DataInf.dwAsicPixelsPerPlane; i; i--, src++, dest++) {
dest->Red = (*src) << 4;
dest->Green = (src[dev->DataInf.dwAsicPixelsPerPlane]) << 4;
dest->Blue = (src[dev->DataInf.dwAsicPixelsPerPlane * 2]) << 4;
}
}
/**
*/
static void u12image_SetupScanStateVariables( U12_Device *dev, u_long index )
{
DataType var;
DBG( _DBG_INFO, "u12image_SetupScanStateVariables(%lu)\n", index );
dev->scan.dpiIdx = index;
if(!(dev->DataInf.dwScanFlag & _SCANDEF_TPA)) {
dev->shade.wExposure = nmlScan[index].exposureTime;
dev->shade.wXStep = nmlScan[index].xStepTime;
if( dev->shade.intermediate & _ScanMode_AverageOut ) {
dev->shade.wExposure >>= 1;
dev->shade.wXStep >>= 1;
}
} else {
if( dev->DataInf.dwScanFlag & _SCANDEF_Transparency ) {
dev->shade.wExposure = posScan[index].exposureTime;
dev->shade.wXStep = posScan[index].xStepTime;
} else {
dev->shade.wExposure = dev->scan.negScan[index].exposureTime;
dev->shade.wXStep = dev->scan.negScan[index].xStepTime;
}
}
dev->scan.dwInterval = 1;
if( dev->DataInf.wPhyDataType == COLOR_BW )
var.dwValue = 0;
else {
if( dev->DataInf.wPhyDataType == COLOR_256GRAY )
var.dwValue = 2500;
else
var.dwValue = 3200;
}
/* for small size/descreen */
if((dev->DataInf.xyAppDpi.y >= 300) && var.dwValue &&
(dev->DataInf.dwAsicBytesPerPlane <= var.dwValue)) {
dev->scan.dwInterval <<= 1;
}
if( var.dwValue && dev->DataInf.dwAsicBytesPerPlane > var.dwValue ) {
if((var.dwValue << 1) > dev->DataInf.dwAsicBytesPerPlane)
dev->scan.dwInterval <<= 1;
else
if((var.dwValue << 2) > dev->DataInf.dwAsicBytesPerPlane)
dev->scan.dwInterval <<= 2;
else
dev->scan.dwInterval <<= 3;
}
if( dev->DataInf.wPhyDataType >= COLOR_TRUE24 ) {
if( dev->DataInf.xyPhyDpi.y > 75U ) {
if( dev->f0_8_16 ) {
dev->scan.gd_gk.wGreenDiscard = dev->DataInf.xyPhyDpi.y / 75U;
} else {
dev->scan.gd_gk.wGreenDiscard = dev->DataInf.xyPhyDpi.y / 150U;
}
} else {
dev->scan.gd_gk.wGreenDiscard = 1;
}
dev->scan.bd_rk.wBlueDiscard = dev->scan.gd_gk.wGreenDiscard << 1;
} else {
dev->scan.bd_rk.wBlueDiscard = dev->scan.gd_gk.wGreenDiscard = 0;
}
}
/** limit the resolution
*/
static u_short
u12image_GetPhysDPI( U12_Device *dev, ImgDef *img, SANE_Bool fDpiX )
{
if( fDpiX ) {
if( img->xyDpi.x > dev->dpi_max_x )
return dev->dpi_max_x;
else
return img->xyDpi.x;
} else {
if( img->xyDpi.y > dev->dpi_max_y )
return dev->dpi_max_y;
else
return img->xyDpi.y;
}
}
/** calculate the image properties according to the scanmode
* set all internally needed information
*/
static void u12image_GetImageInfo( U12_Device *dev, ImgDef *image )
{
DBG( _DBG_INFO, "u12image_GetImageInfo()\n" );
dev->DataInf.xyPhyDpi.x = u12image_GetPhysDPI(dev, image, SANE_TRUE );
dev->DataInf.xyPhyDpi.y = u12image_GetPhysDPI(dev, image, SANE_FALSE);
DBG( _DBG_INFO, "* xyPhyDpi.x = %u, xyPhyDpi.y = %u\n",
dev->DataInf.xyPhyDpi.x, dev->DataInf.xyPhyDpi.y );
DBG( _DBG_INFO, "* crArea.x = %u, crArea.y = %u\n",
image->crArea.x, image->crArea.y );
DBG( _DBG_INFO, "* crArea.cx = %u, crArea.cy = %u\n",
image->crArea.cx, image->crArea.cy );
dev->DataInf.xyRatio = (double)dev->DataInf.xyPhyDpi.y/
(double)dev->DataInf.xyPhyDpi.x;
dev->DataInf.dwAppLinesPerArea = (u_long)image->crArea.cy *
image->xyDpi.y / _MEASURE_BASE;
dev->DataInf.dwAppPixelsPerLine = (u_long)image->crArea.cx *
image->xyDpi.x / _MEASURE_BASE;
dev->DataInf.dwPhysBytesPerLine = (u_long)image->crArea.cx *
dev->DataInf.xyPhyDpi.x / _MEASURE_BASE;
if( image->wDataType <= COLOR_BW ) {
dev->DataInf.dwAsicPixelsPerPlane =
(dev->DataInf.dwAppPixelsPerLine+7UL) & 0xfffffff8UL;
dev->DataInf.dwAppPhyBytesPerLine =
dev->DataInf.dwAppBytesPerLine =
dev->DataInf.dwAsicBytesPerLine =
dev->DataInf.dwAsicBytesPerPlane = dev->DataInf.dwAsicPixelsPerPlane>>3;
} else {
dev->DataInf.dwAsicBytesPerPlane =
dev->DataInf.dwAsicPixelsPerPlane = dev->DataInf.dwAppPixelsPerLine;
}
if( COLOR_TRUE42 == image->wDataType ) {
dev->DataInf.dwAsicBytesPerPlane *= 2;
}
switch( image->wDataType ) {
case COLOR_BW:
dev->scan.DataProcess = fnDataDirect;
dev->DataInf.wPhyDataType = COLOR_BW;
dev->shade.intermediate = _ScanMode_Mono;
break;
case COLOR_256GRAY:
dev->scan.DataProcess = fnDataDirect;
dev->DataInf.dwAsicBytesPerLine =
dev->DataInf.dwAppPhyBytesPerLine = dev->DataInf.dwAppPixelsPerLine;
dev->DataInf.wPhyDataType = COLOR_256GRAY;
dev->shade.intermediate = _ScanMode_Mono;
break;
case COLOR_TRUE24:
dev->scan.DataProcess = fnColorDirect;
dev->DataInf.dwAsicBytesPerLine =
dev->DataInf.dwAppPhyBytesPerLine = dev->DataInf.dwAppPixelsPerLine * 3;
dev->DataInf.wPhyDataType = COLOR_TRUE24;
dev->shade.intermediate = _ScanMode_Color;
break;
case COLOR_TRUE42:
dev->scan.DataProcess = fnColor42;
dev->DataInf.dwAsicBytesPerLine =
dev->DataInf.dwAppPhyBytesPerLine = dev->DataInf.dwAppPixelsPerLine * 6;
dev->DataInf.wPhyDataType = COLOR_TRUE42;
dev->shade.intermediate = _ScanMode_Color;
break;
}
/* raus mit einem von beiden!!!!*/
dev->DataInf.dwAppBytesPerLine = dev->DataInf.dwAppPhyBytesPerLine;
DBG( _DBG_INFO, "AppLinesPerArea = %lu\n", dev->DataInf.dwAppLinesPerArea );
DBG( _DBG_INFO, "AppPixelsPerLine = %lu\n", dev->DataInf.dwAppPixelsPerLine );
DBG( _DBG_INFO, "AppPhyBytesPerLine = %lu\n", dev->DataInf.dwAppPhyBytesPerLine );
DBG( _DBG_INFO, "AppBytesPerLine = %lu\n", dev->DataInf.dwAppBytesPerLine );
DBG( _DBG_INFO, "AsicPixelsPerPlane = %lu\n", dev->DataInf.dwAsicPixelsPerPlane );
DBG( _DBG_INFO, "AsicBytesPerPlane = %lu\n", dev->DataInf.dwAsicBytesPerPlane );
DBG( _DBG_INFO, "AsicBytesPerLine = %lu\n", dev->DataInf.dwAsicBytesPerLine );
DBG( _DBG_INFO, "Physical Bytes = %lu\n", dev->DataInf.dwPhysBytesPerLine );
}
/**
*/
static int imageSetupScanSettings( U12_Device *dev, ImgDef *img )
{
u_short brightness;
DBG( _DBG_INFO, "imageSetupScanSettings()\n" );
dev->DataInf.dwScanFlag = img->dwFlag;
dev->DataInf.crImage = img->crArea;
DBG( _DBG_INFO,"* DataInf.dwScanFlag = 0x%08lx\n",dev->DataInf.dwScanFlag);
dev->DataInf.crImage.x <<= 1;
dev->DataInf.xyAppDpi = img->xyDpi;
dev->DataInf.wAppDataType = img->wDataType;
u12image_GetImageInfo( dev, img );
dev->scan.lBufferAdjust = (long)dev->DataInf.dwAppBytesPerLine;
DBG( _DBG_INFO, "* Scan settings:\n" );
DBG( _DBG_INFO, "* ImageInfo: (x=%u,y=%u,dx=%u,dy=%u)\n",
dev->DataInf.crImage.x, dev->DataInf.crImage.y,
dev->DataInf.crImage.cx, dev->DataInf.crImage.cy );
/*
* 0 _DEF_BW_THRESHOLD 255
* +-------------------------+--------------------------------+
* |<------- Black --------->|<----------- White ------------>|
* So, if user wish to make image darker, the threshold value should be
* higher than _defBwThreshold, otherwise it should lower than the
* _DefBwThreshold.
* Darker = _DEF_BW_THRESHOLD + White * Input / 127;
* Input < 0, and White = 255 - _DEF_BW_THRESHOLD, so
* = _DEF_BW_THRESHOLD - (255 - _DEF_BW_THRESHOLD) * Input / 127;
* The brighter is the same idea.
*/
/* CHECK: We have now two methods for setting the brightness...
*/
DBG( _DBG_INFO, "* brightness = %i\n", dev->DataInf.siBrightness );
if ( dev->DataInf.siBrightness < 0) {
brightness = (u_short)(_DEF_BW_THRESHOLD -
(255 - _DEF_BW_THRESHOLD) * dev->DataInf.siBrightness /127);
} else {
brightness = (u_short)(_DEF_BW_THRESHOLD -
_DEF_BW_THRESHOLD * dev->DataInf.siBrightness /127);
}
dev->regs.RD_ThresholdControl = brightness;
DBG( _DBG_INFO, "* RD_ThresholdControl = %i\n", brightness );
return 0;
}
/** PrepareScanningVariables() !!!
*/
static SANE_Status u12image_SetupScanSettings( U12_Device *dev, ImgDef *img )
{
DBG( _DBG_INFO, "u12image_SetupScanSettings()\n" );
wPreviewScanned = 0;
dev->scan.dpiIdx = 0;
dev->scan.negScan = negScan;
imageSetupScanSettings( dev, img );
if( !(dev->DataInf.dwScanFlag & _SCANDEF_TPA )) {
dev->scan.dwScanOrigin = dev->adj.upNormal * 4 + _RFT_SCANNING_ORG;
} else if( dev->DataInf.dwScanFlag & _SCANDEF_Transparency) {
dev->scan.dwScanOrigin = dev->adj.upPositive * 4 + _POS_SCANNING_ORG;
} else {
dev->scan.dwScanOrigin = dev->adj.upNegative * 4 + _NEG_SCANNING_ORG;
}
dev->scan.dwScanOrigin += 64 /*dev->dwModelOriginY*/;
if( dev->DataInf.xyAppDpi.y <= 75 ) {
if( dev->DataInf.dwScanFlag & _SCANDEF_PREVIEW ) {
dev->scan.bDiscardAll = 0;
dev->DataInf.xyPhyDpi.y = 150;
dev->shade.intermediate |= _ScanMode_AverageOut;
u12image_SetupScanStateVariables( dev, 1 );
dev->scan.gd_gk.wGreenDiscard = 0;
if( dev->DataInf.xyAppDpi.y >= 38 )
dev->scan.bd_rk.wBlueDiscard = 1;
else
dev->scan.bd_rk.wBlueDiscard = 0;
if( dev->DataInf.wPhyDataType >= COLOR_256GRAY ) {
dev->shade.wXStep = 6;
dev->shade.wExposure = 8 * dev->shade.wXStep;
}
} else {
if(!(dev->DataInf.dwScanFlag & _SCANDEF_TPA) &&
(dev->DataInf.xyAppDpi.y <= 50) &&
(dev->DataInf.wPhyDataType >= COLOR_TRUE24)) {
dev->shade.intermediate |= _ScanMode_AverageOut;
}
if((dev->DataInf.wPhyDataType<COLOR_TRUE24) || dev->f0_8_16 ||
(dev->shade.intermediate & _ScanMode_AverageOut)) {
dev->scan.bDiscardAll = 1;
dev->DataInf.xyPhyDpi.y = 75;
u12image_SetupScanStateVariables( dev, 0 );
} else {
dev->scan.bDiscardAll = 2;
dev->DataInf.xyPhyDpi.y = 150;
u12image_SetupScanStateVariables( dev, 1 );
}
}
} else {
if( dev->DataInf.xyAppDpi.y <= 150 ) {
dev->scan.bDiscardAll = 2;
dev->DataInf.xyPhyDpi.y = 150;
u12image_SetupScanStateVariables( dev, 1 );
} else if( dev->DataInf.xyAppDpi.y <= 300 ) {
dev->scan.bDiscardAll = 4;
dev->DataInf.xyPhyDpi.y = 300;
u12image_SetupScanStateVariables( dev, 2 );
} else if( dev->DataInf.xyAppDpi.y <= 600 ) {
dev->scan.bDiscardAll = 8;
dev->DataInf.xyPhyDpi.y = 600;
u12image_SetupScanStateVariables( dev, 3 );
} else {
dev->scan.bDiscardAll = 16;
dev->DataInf.xyPhyDpi.y = 1200;
u12image_SetupScanStateVariables( dev, 4 );
}
}
/* ------- lines to sample or not? ------- */
if( dev->DataInf.xyAppDpi.y == dev->DataInf.xyPhyDpi.y ) {
DBG( _DBG_INFO, "* Sample every line\n" );
dev->scan.DoSample = fnEveryLine;
} else {
if( dev->DataInf.dwScanFlag & _SCANDEF_PREVIEW ) {
DBG( _DBG_INFO, "* Sample preview\n" );
dev->scan.DoSample = fnSamplePreview;
dev->DataInf.wYSum = 150;
if( dev->DataInf.xyAppDpi.y >= 38 )
wPreviewScanned = dev->DataInf.xyAppDpi.y * 2;
else if( dev->DataInf.xyAppDpi.y >= 19 )
wPreviewScanned = dev->DataInf.xyAppDpi.y * 4;
else
wPreviewScanned = dev->DataInf.xyAppDpi.y * 8;
} else {
DBG( _DBG_INFO, "* Sample lines (%u - %u)...\n",
dev->DataInf.xyPhyDpi.y, dev->DataInf.xyAppDpi.y );
dev->scan.DoSample = fnSampleLines;
dev->DataInf.wYSum = dev->DataInf.xyPhyDpi.y - dev->DataInf.xyAppDpi.y;
}
}
/* now assign the buffer pointers for image acquisition
*/
dev->scan.p48BitBuf.pb = NULL;
if( dev->DataInf.wPhyDataType >= COLOR_TRUE24 ) {
u_long r, g, b;
r = (u_long)_SIZE_REDFIFO /
dev->DataInf.dwAsicBytesPerPlane - dev->scan.bd_rk.wRedKeep;
g = (u_long)_SIZE_GREENFIFO /
dev->DataInf.dwAsicBytesPerPlane - dev->scan.gd_gk.wGreenKeep;
if((int)r < 16 || (int)g < 16) {
b = (u_long)(dev->scan.bd_rk.wRedKeep +
dev->scan.gd_gk.wGreenKeep + 2U) *
dev->DataInf.dwAsicBytesPerPlane;
DBG( _DBG_INFO, "48Bit buffer request: "
"len=%lu bytes, available=%lu\n", b, _SIZE_TOTAL_BUF_TPA );
if( b > _SIZE_TOTAL_BUF_TPA ) {
DBG( _DBG_ERROR, "Not that much FIFO memory available!\n" );
return SANE_STATUS_NO_MEM;
}
dev->scan.p48BitBuf.pb = dev->bufs.b1.pReadBuf;
}
}
if( dev->scan.p48BitBuf.pb ){
dev->scan.DataRead = fnReadToDriver;
dev->scan.BufGet.red.bp =
dev->scan.BufPut.red.bp =
dev->scan.BufBegin.red.bp = dev->scan.p48BitBuf.pb;
dev->scan.BufEnd.red.bp =
dev->scan.BufBegin.green.bp =
dev->scan.BufGet.green.bp =
dev->scan.BufPut.green.bp = dev->scan.p48BitBuf.pb +
dev->DataInf.dwAsicBytesPerLine *
(dev->scan.bd_rk.wRedKeep + 1U);
dev->scan.BufEnd.green.bp = dev->scan.BufBegin.green.bp +
dev->DataInf.dwAsicBytesPerLine *
(dev->scan.gd_gk.wGreenKeep + 1U);
dev->scan.BufPut.blue.bp =
dev->scan.BufGet.blue.bp = dev->bufs.b1.pReadBuf +
dev->DataInf.dwAsicBytesPerLine * 2;
} else {
dev->scan.DataRead = fnReadOutScanner;
dev->scan.BufPut.red.bp = dev->bufs.b1.pReadBuf;
dev->scan.BufData.green.bp =
dev->scan.BufPut.green.bp = dev->scan.BufPut.red.bp +
dev->DataInf.dwAsicBytesPerLine;
dev->scan.BufPut.blue.bp = dev->scan.BufPut.green.bp +
dev->DataInf.dwAsicBytesPerLine;
dev->scan.BufData.red.bp = dev->scan.BufPut.red.bp;
dev->scan.BufData.blue.bp = dev->scan.BufPut.blue.bp;
}
/* CHECK: maybe remove this stuff */
#if 0
if( ps->DataInf.dwScanFlag & _SCANDEF_Transparency) {
posScan[1].exposureTime = 96;
posScan[1].xStepTime = 12;
posScan[2].exposureTime = 96;
posScan[2].xStepTime = 24;
posScan[3].exposureTime = 96;
posScan[3].xStepTime = 48;
posScan[4].exposureTime = 96;
posScan[4].xStepTime = 96;
/* Reset shading Exposure Time & xStep Time */
ps->Shade.wExposure = posScan[ps->Scan.dpiIdx].exposureTime;
ps->Shade.wXStep = posScan[ps->Scan.dpiIdx].xStepTime;
}
else if( ps->DataInf.dwScanFlag & _SCANDEF_Negative) {
ps->Scan.negScan[1].exposureTime = 96;
ps->Scan.negScan[1].xStepTime = 12;
ps->Scan.negScan[2].exposureTime = 96;
ps->Scan.negScan[2].xStepTime = 24;
ps->Scan.negScan[3].exposureTime = 96;
ps->Scan.negScan[3].xStepTime = 48;
ps->Scan.negScan[4].exposureTime = 96;
ps->Scan.negScan[4].xStepTime = 96;
/* Reset shading Exposure Time & xStep Time */
ps->Shade.wExposure = ps->Scan.negScan[ps->Scan.dpiIdx].exposureTime;
ps->Shade.wXStep = ps->Scan.negScan[ps->Scan.dpiIdx].xStepTime;
}
#endif
return SANE_STATUS_GOOD;
}
/**
*/
static SANE_Bool u12image_DataIsReady( U12_Device *dev, void* buf )
{
DBG( _DBG_READ, "* DataIsReady()\n" );
if( dev->scan.bDiscardAll ) {
dev->scan.bDiscardAll--;
if( dev->DataInf.wPhyDataType <= COLOR_256GRAY ) {
dev->regs.RD_ModeControl = _ModeFifoGSel;
u12io_ReadMonoData( dev, dev->bufs.b1.pReadBuf,
dev->DataInf.dwAsicBytesPerPlane );
} else {
u12io_ReadColorData( dev, dev->bufs.b1.pReadBuf,
dev->DataInf.dwAsicBytesPerPlane );
}
return SANE_FALSE;
}
if( dev->DataInf.wPhyDataType <= COLOR_256GRAY ) {
dev->regs.RD_ModeControl = _ModeFifoGSel;
u12io_ReadMonoData( dev, buf, dev->DataInf.dwAsicBytesPerPlane );
} else {
if( !dev->scan.DataRead( dev )) {
return SANE_FALSE;
}
}
if( dev->scan.DoSample( dev )) {
/* direct is done here without copying...*/
if( fnDataDirect != dev->scan.DataProcess ) {
(*dev->scan.DataProcess)(dev, buf, (void*)(dev->scan.BufPut.red.bp),
dev->DataInf.dwAppPhyBytesPerLine);
}
return SANE_TRUE;
}
return SANE_FALSE;
}
/**
*/
static SANE_Status u12image_ReadOneImageLine( U12_Device *dev, void* buf )
{
SANE_Byte b, state;
TimerDef timer, t2;
DBG( _DBG_READ, "u12image_ReadOneImageLine()\n" );
u12io_StartTimer( &timer, _LINE_TIMEOUT );
u12io_StartTimer( &t2, _SECOND*2 );
do {
state = u12io_GetScanState( dev );
dev->scan.bNowScanState = (state & _SCANSTATE_MASK);
if( state & _SCANSTATE_STOP ) {
DBG( _DBG_READ, "* SCANSTATE_STOP\n" );
u12motor_ModuleForwardBackward( dev );
if( u12io_GetFifoLength( dev ) >= dev->scan.dwMinReadFifo )
if( u12image_DataIsReady( dev, buf ))
return SANE_STATUS_GOOD;
} else {
dev->scan.bModuleState = _MotorInNormalState;
b = dev->scan.bNowScanState - dev->scan.oldScanState;
if((char) b < 0)
b += _NUMBER_OF_SCANSTEPS;
if( b >= dev->scan.bRefresh ) {
u12io_RegisterToScanner( dev, REG_REFRESHSCANSTATE );
dev->scan.oldScanState = u12io_GetScanState( dev );
dev->scan.oldScanState &= _SCANSTATE_MASK;
}
if( u12io_GetFifoLength( dev ) >= dev->scan.dwMaxReadFifo ) {
if( u12image_DataIsReady( dev, buf ))
return SANE_STATUS_GOOD;
}
else {
b = dev->scan.bNowScanState - dev->scan.oldScanState;
if((char) b < 0)
b += _NUMBER_OF_SCANSTEPS;
if( b >= dev->scan.bRefresh ) {
u12io_RegisterToScanner( dev, REG_REFRESHSCANSTATE );
dev->scan.oldScanState = u12io_GetScanState( dev );
dev->scan.oldScanState &= _SCANSTATE_MASK;
}
if( u12io_GetFifoLength( dev ) >= dev->scan.dwMinReadFifo ) {
if( u12image_DataIsReady( dev, buf ))
return SANE_STATUS_GOOD;
}
}
}
} while( !u12io_CheckTimer( &timer ));
DBG( _DBG_ERROR, "Timeout - Scanner malfunction !!\n" );
u12motor_ToHomePosition( dev, SANE_TRUE );
/* timed out, scanner malfunction */
return SANE_STATUS_IO_ERROR;
}
/**
*/
static void u12image_PrepareScaling( U12_Device *dev )
{
int step;
double ratio;
dev->scaleBuf = NULL;
DBG( _DBG_INFO, "APP-DPIX=%u, MAX-DPIX=%u\n",
dev->DataInf.xyAppDpi.x, dev->dpi_max_x );
if( dev->DataInf.xyAppDpi.x > dev->dpi_max_x ) {
dev->scaleBuf = malloc( dev->DataInf.dwAppBytesPerLine );
ratio = (double)dev->DataInf.xyAppDpi.x/(double)dev->dpi_max_x;
dev->scaleIzoom = (int)(1.0/ratio * 1000);
switch( dev->DataInf.wAppDataType ) {
case COLOR_BW : step = 0; break;
case COLOR_256GRAY : step = 1; break;
case COLOR_TRUE24 : step = 3; break;
case COLOR_TRUE42 : step = 6; break;
default : step = 99; break;
}
dev->scaleStep = step;
DBG( _DBG_INFO, "u12image_PrepareScaling: izoom=%i, step=%u\n",
dev->scaleIzoom, step );
} else {
DBG( _DBG_INFO, "u12image_PrepareScaling: DISABLED\n" );
}
}
/** scaling picture data in x-direction, using a DDA algorithm
* (digital differential analyzer).
*/
static void u12image_ScaleX( U12_Device *dev, SANE_Byte *ib, SANE_Byte *ob )
{
SANE_Byte tmp;
int ddax;
u_long i, j, x;
/* when not supported, only copy the data */
if( 99 == dev->scaleStep ) {
memcpy( ob, ib, dev->DataInf.dwAppBytesPerLine );
return;
}
/* now scale... */
if( 0 == dev->scaleStep ) {
/* binary scaling */
ddax = 0;
x = 0;
memset( ob, 0, dev->DataInf.dwAppBytesPerLine );
for( i = 0; i < dev->DataInf.dwPhysBytesPerLine*8; i++ ) {
ddax -= 1000;
while( ddax < 0 ) {
tmp = ib[(i>>3)];
if((x>>3) < dev->DataInf.dwAppBytesPerLine ) {
if( 0 != (tmp &= (1 << ((~(i & 0x7))&0x7))))
ob[x>>3] |= (1 << ((~(x & 0x7))&0x7));
}
x++;
ddax += dev->scaleIzoom;
}
}
} else {
/* color and gray scaling */
ddax = 0;
x = 0;
for( i = 0; i < dev->DataInf.dwPhysBytesPerLine*dev->scaleStep;
i+=dev->scaleStep ) {
ddax -= 1000;
while( ddax < 0 ) {
for( j = 0; j < (u_long)dev->scaleStep; j++ ) {
if((x+j) < dev->DataInf.dwAppBytesPerLine ) {
ob[x+j] = ib[i+j];
}
}
x += dev->scaleStep;
ddax += dev->scaleIzoom;
}
}
}
}
/* END U12_IMAGE.C ..........................................................*/
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