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sane-project-backends/backend/plustek.c

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43 KiB
C
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/*.............................................................................
* Project : SANE library for Plustek flatbed scanners.
*.............................................................................
* File: plustek.c - the SANE backend for the plustek driver
*.............................................................................
*
* based on Kazuhiro Sasayama previous
* Work on plustek.[ch] file from the SANE package.
* original code taken from sane-0.71
* Copyright (C) 1997 Hypercore Software Design, Ltd.
* also based on the work done by Rick Bronson
* Copyright (C) 2000 Gerhard Jaeger <g.jaeger@earthling.net>
*.............................................................................
* History:
* 0.30 - initial version
* 0.31 - no changes
* 0.32 - no changes
* 0.33 - no changes
* 0.34 - moved some definitions and typedefs to plustek.h
* 0.35 - removed Y-correction for 12000P model
* getting Y-size of scan area from driver
* 0.36 - disabled Dropout, as this does currently not work
* enabled Halftone selection only for Halftone-mode
* made the cancel button work by using a child process during read
* added version code to driver interface
* cleaned up the code
* fixed sane compatibility problems
* added multiple device support
* 12bit color-depth are now available for scanimage
*
*.............................................................................
*
* 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.
*/
#ifdef _AIX
# include <lalloca.h> /* MUST come first for AIX! */
#endif
#include "sane/config.h"
#include <lalloca.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <time.h>
#include <sys/wait.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include "sane/sane.h"
#include "sane/sanei.h"
#include "sane/saneopts.h"
#define BACKEND_NAME plustek
#include "sane/sanei_backend.h"
#include "sane/sanei_config.h"
#include "plustek.h"
#include "plustek-share.h"
/*********************** the debug levels ************************************/
#define _DBG_FATAL 0
#define _DBG_ERROR 1
#define _DBG_WARNING 3
#define _DBG_INFO 5
#define _DBG_PROC 7
#define _DBG_SANE_INIT 10
#define _DBG_READ 15
/*********************** other definitions ***********************************/
#define _MODEL_STR_LEN 255
/************************** global vars **************************************/
static int num_devices;
static Plustek_Device *first_dev;
static Plustek_Scanner *first_handle;
static unsigned long tsecs = 0;
static ModeParam mode_params[] =
{
{0, 1, COLOR_BW},
{0, 1, COLOR_HALFTONE},
{0, 8, COLOR_256GRAY},
{1, 8, COLOR_TRUE24},
{1, 16, COLOR_TRUE32},
{1, 16, COLOR_TRUE36},
};
static ModeParam mode_9636_params[] =
{
{0, 1, COLOR_BW},
{0, 1, COLOR_HALFTONE},
{0, 8, COLOR_256GRAY},
{1, 8, COLOR_TRUE24},
{1, 16, COLOR_TRUE48},
};
static const SANE_String_Const mode_list[] =
{
"Binary",
"Halftone",
"Gray",
"Color",
/* "Color30", */
NULL
};
static const SANE_String_Const mode_9636_list[] =
{
"Binary",
"Halftone",
"Gray",
"Color",
"Color36",
NULL
};
static const SANE_String_Const ext_mode_list[] =
{
"Normal",
"Transparency",
"Negative",
NULL
};
static const SANE_String_Const halftone_list[] =
{
"Dithermap 1",
"Dithermap 2",
"Randomize",
NULL
};
static const SANE_String_Const dropout_list[] =
{
"None",
"Red",
"Green",
"Blue",
NULL
};
static const SANE_Range percentage_range =
{
-100 << SANE_FIXED_SCALE_SHIFT, /* minimum */
100 << SANE_FIXED_SCALE_SHIFT, /* maximum */
1 << SANE_FIXED_SCALE_SHIFT /* quantization */
};
/*
* lens info
*/
static LensInfo lens = {{0,0,0,0,},{0,0,0,0,},{0,0,0,0,},{0,0,0,0,},0,0};
/*
* see plustek-share.h
*/
MODELSTR;
/* authorization stuff */
static SANE_Auth_Callback auth = NULL;
/*.............................................................................
* open the driver
*/
static int drvopen( const char *dev_name )
{
int result;
int handle;
unsigned short version = _PTDRV_IOCTL_VERSION;
DBG( _DBG_INFO, "drvopen()\n" );
if ((handle = open(dev_name, O_RDONLY)) < 0) {
DBG(_DBG_ERROR, "open: can't open %s as a device\n", dev_name);
return handle;
}
result = ioctl(handle, _PTDRV_OPEN_DEVICE, &version );
if( result < 0 ) {
close( handle );
DBG( _DBG_ERROR,"ioctl PT_DRV_OPEN_DEVICE failed(%d)\n", result );
return result;
}
tsecs = 0;
return handle;
}
/*.............................................................................
* close the driver
*/
static SANE_Status drvclose( int handle )
{
int int_cnt;
if( handle >= 0 ) {
DBG( _DBG_INFO, "drvclose()\n" );
if( 0 != tsecs ) {
DBG( _DBG_INFO, "TIME END 1: %lus\n", time(NULL)-tsecs);
}
/*
* don't check the return values, simply do it and close the driver
*/
int_cnt = 0;
ioctl( handle, _PTDRV_STOP_SCAN, &int_cnt );
ioctl( handle, _PTDRV_CLOSE_DEVICE, 0);
close( handle );
}
return SANE_STATUS_GOOD;
}
/*.............................................................................
* according to the mode and source we return the corresponding mode list
*/
static pModeParam getModeList( Plustek_Scanner *scanner )
{
pModeParam mp;
if((MODEL_OP_9636T == scanner->hw->model) ||
(MODEL_OP_9636P == scanner->hw->model) ||
(MODEL_OP_9636PP == scanner->hw->model)) {
mp = mode_9636_params;
} else {
mp = mode_params;
}
/*
* the transparency/negative mode supports only GRAY/COLOR/COLOR32/COLOR48
*/
if( 0 != scanner->val[OPT_EXT_MODE].w )
mp = &mp[_TPAModeSupportMin];
return mp;
}
/*.............................................................................
*
*/
static SANE_Status close_pipe( Plustek_Scanner *scanner )
{
if( scanner->pipe >= 0 ) {
DBG( _DBG_PROC, "close_pipe\n" );
close( scanner->pipe );
scanner->pipe = -1;
}
return SANE_STATUS_EOF;
}
/*.............................................................................
*
*/
static void sig_chldhandler( int signo )
{
DBG( _DBG_PROC, "Child is down (signal=%d)\n", signo );
}
/*.............................................................................
* signal handler to kill the child process
*/
static RETSIGTYPE reader_process_sigterm_handler( int signal )
{
DBG( _DBG_PROC, "reader_process: terminated by signal %d\n", signal );
_exit( SANE_STATUS_GOOD );
}
/*.............................................................................
* executed as a child process
* read the data from the driver and send the to the parent process
*/
static int reader_process( Plustek_Scanner *scanner, int pipe_fd )
{
unsigned long status;
unsigned long data_length;
struct SIGACTION act;
DBG( _DBG_PROC, "reader_process started\n" );
/* install the signal handler */
memset (&act, 0, sizeof(act));
act.sa_handler = reader_process_sigterm_handler;
sigaction (SIGTERM, &act, 0);
data_length = scanner->params.lines * scanner->params.bytes_per_line;
DBG( _DBG_PROC, "reader_process:"
"starting to READ data (%lu bytes)\n", data_length );
DBG( _DBG_PROC, "buf = 0x%08lx\n", (unsigned long)scanner->buf );
if( NULL == scanner->buf ) {
DBG( _DBG_FATAL, "NULL Pointer !!!!\n" );
return SANE_STATUS_IO_ERROR;
}
/* here we read all data from the driver... */
status = (unsigned long)read( scanner->hw->fd, scanner->buf, data_length );
/* on error, there's no need to clean up, as this is done by the parent */
if((int)status < 0 ) {
DBG( _DBG_ERROR, "read failed, error %i\n", errno );
if( errno == EBUSY )
return SANE_STATUS_DEVICE_BUSY;
return SANE_STATUS_IO_ERROR;
}
/* send to parent */
DBG( _DBG_PROC, "sending %lu bytes to parent\n", status );
write( pipe_fd, scanner->buf, status );
pipe_fd = -1;
DBG( _DBG_PROC, "reader_process: finished reading data\n" );
return SANE_STATUS_GOOD;
}
/*.............................................................................
* stop the current scan process
*/
static SANE_Status do_cancel( Plustek_Scanner *scanner, SANE_Bool closepipe )
{
pid_t res;
int int_cnt;
DBG( _DBG_PROC,"do_cancel\n" );
scanner->scanning = SANE_FALSE;
if (scanner->reader_pid > 0) {
DBG( _DBG_PROC,"killing reader_process\n" );
/* tell the driver to stop scanning */
if( -1 != scanner->hw->fd ) {
int_cnt = 1;
ioctl(scanner->hw->fd, _PTDRV_STOP_SCAN, &int_cnt );
}
/* kill our child process and wait until done */
kill( scanner->reader_pid, SIGTERM );
res = waitpid( scanner->reader_pid, 0, 0 );
if( res != scanner->reader_pid )
DBG( _DBG_PROC,"waitpid() failed !\n");
scanner->reader_pid = 0;
DBG( _DBG_PROC,"reader_process killed\n");
}
if( SANE_TRUE == closepipe ) {
close_pipe( scanner );
}
drvclose( scanner->hw->fd );
if( tsecs != 0 ) {
DBG( _DBG_INFO, "TIME END 2: %lus\n", time(NULL)-tsecs);
tsecs = 0;
}
scanner->hw->fd = -1;
return SANE_STATUS_CANCELLED;
}
/*.............................................................................
*
*/
static SANE_Status limitResolution( Plustek_Device *dev )
{
dev->dpi_range.min = _DEF_DPI;
/*
* CHANGE: limit resolution to max. physical available one
* Note: the limit for the Asic 96001/3 models is limited to the
* X-Resolution
*/
if( _ASIC_IS_98001 == dev->asic ) {
dev->dpi_range.max = lens.rDpiY.wPhyMax;
} else {
dev->dpi_range.max = lens.rDpiX.wPhyMax;
}
dev->dpi_range.quant = 0;
dev->x_range.min = 0;
dev->x_range.max = SANE_FIX(_NORMAL_X);
dev->x_range.quant = 0;
dev->y_range.min = 0;
dev->y_range.max = SANE_FIX(dev->max_y);
dev->y_range.quant = 0;
return SANE_STATUS_GOOD;
}
/*.............................................................................
* initialize the options for the backend according to the device we have
*/
static SANE_Status init_options( Plustek_Scanner *s )
{
int i;
memset( s->opt, 0, sizeof(s->opt));
for (i = 0; i < NUM_OPTIONS; ++i) {
s->opt[i].size = sizeof (SANE_Word);
s->opt[i].cap = SANE_CAP_SOFT_SELECT | SANE_CAP_SOFT_DETECT;
}
s->opt[OPT_NUM_OPTS].name = SANE_NAME_NUM_OPTIONS;
s->opt[OPT_NUM_OPTS].title = SANE_TITLE_NUM_OPTIONS;
s->opt[OPT_NUM_OPTS].desc = SANE_DESC_NUM_OPTIONS;
s->opt[OPT_NUM_OPTS].type = SANE_TYPE_INT;
s->opt[OPT_NUM_OPTS].unit = SANE_UNIT_NONE;
s->opt[OPT_NUM_OPTS].size = sizeof(SANE_Word);
s->opt[OPT_NUM_OPTS].cap = SANE_CAP_SOFT_DETECT;
s->opt[OPT_NUM_OPTS].constraint_type = SANE_CONSTRAINT_NONE;
s->val[OPT_NUM_OPTS].w = NUM_OPTIONS;
/* "Scan Mode" group: */
s->opt[OPT_MODE_GROUP].name = "Scan Mode group";
s->opt[OPT_MODE_GROUP].title = "Scan Mode";
s->opt[OPT_MODE_GROUP].desc = "";
s->opt[OPT_MODE_GROUP].type = SANE_TYPE_GROUP;
s->opt[OPT_MODE_GROUP].cap = 0;
/* scan mode */
s->opt[OPT_MODE].name = SANE_NAME_SCAN_MODE;
s->opt[OPT_MODE].title = SANE_TITLE_SCAN_MODE;
s->opt[OPT_MODE].desc = SANE_DESC_SCAN_MODE;
s->opt[OPT_MODE].type = SANE_TYPE_STRING;
s->opt[OPT_MODE].size = 32;
s->opt[OPT_MODE].constraint_type = SANE_CONSTRAINT_STRING_LIST;
if((MODEL_OP_9636T == s->hw->model) ||
(MODEL_OP_9636P == s->hw->model) ||
(MODEL_OP_9636PP == s->hw->model)) {
s->opt[OPT_MODE].constraint.string_list = mode_9636_list;
} else {
s->opt[OPT_MODE].constraint.string_list = mode_list;
}
s->val[OPT_MODE].w = 3; /* Color */
/* scan source */
s->opt[OPT_EXT_MODE].name = SANE_NAME_SCAN_SOURCE;
s->opt[OPT_EXT_MODE].title = SANE_TITLE_SCAN_SOURCE;
s->opt[OPT_EXT_MODE].desc = PLUSTEK_DESC_SCAN_SOURCE;
s->opt[OPT_EXT_MODE].type = SANE_TYPE_STRING;
s->opt[OPT_EXT_MODE].size = 32;
s->opt[OPT_EXT_MODE].constraint_type = SANE_CONSTRAINT_STRING_LIST;
s->opt[OPT_EXT_MODE].constraint.string_list = ext_mode_list;
s->val[OPT_EXT_MODE].w = 0; /* Normal */
/* halftone */
s->opt[OPT_HALFTONE].name = SANE_NAME_HALFTONE;
s->opt[OPT_HALFTONE].title = SANE_TITLE_HALFTONE;
s->opt[OPT_HALFTONE].desc = "Selects the halftone.";
s->opt[OPT_HALFTONE].type = SANE_TYPE_STRING;
s->opt[OPT_HALFTONE].size = 32;
s->opt[OPT_HALFTONE].constraint_type = SANE_CONSTRAINT_STRING_LIST;
s->opt[OPT_HALFTONE].constraint.string_list = halftone_list;
s->val[OPT_HALFTONE].w = 0; /* Standard dithermap */
s->opt[OPT_HALFTONE].cap |= SANE_CAP_INACTIVE;
/* dropout */
s->opt[OPT_DROPOUT].name = "dropout";
s->opt[OPT_DROPOUT].title = "Dropout";
s->opt[OPT_DROPOUT].desc = "Selects the dropout.";
s->opt[OPT_DROPOUT].type = SANE_TYPE_STRING;
s->opt[OPT_DROPOUT].size = 32;
s->opt[OPT_DROPOUT].cap |= SANE_CAP_ADVANCED;
s->opt[OPT_DROPOUT].constraint_type = SANE_CONSTRAINT_STRING_LIST;
s->opt[OPT_DROPOUT].constraint.string_list = dropout_list;
s->val[OPT_DROPOUT].w = 0; /* None */
s->opt[OPT_DROPOUT].cap |= SANE_CAP_INACTIVE;
/* brightness */
s->opt[OPT_BRIGHTNESS].name = SANE_NAME_BRIGHTNESS;
s->opt[OPT_BRIGHTNESS].title = SANE_TITLE_BRIGHTNESS;
s->opt[OPT_BRIGHTNESS].desc = "Selects the brightness.";
s->opt[OPT_BRIGHTNESS].type = SANE_TYPE_FIXED;
s->opt[OPT_BRIGHTNESS].unit = SANE_UNIT_PERCENT;
s->opt[OPT_BRIGHTNESS].constraint_type = SANE_CONSTRAINT_RANGE;
s->opt[OPT_BRIGHTNESS].constraint.range = &percentage_range;
s->val[OPT_BRIGHTNESS].w = 0;
/* contrast */
s->opt[OPT_CONTRAST].name = SANE_NAME_CONTRAST;
s->opt[OPT_CONTRAST].title = SANE_TITLE_CONTRAST;
s->opt[OPT_CONTRAST].desc = SANE_DESC_CONTRAST;
s->opt[OPT_CONTRAST].type = SANE_TYPE_FIXED;
s->opt[OPT_CONTRAST].unit = SANE_UNIT_PERCENT;
s->opt[OPT_CONTRAST].constraint_type = SANE_CONSTRAINT_RANGE;
s->opt[OPT_CONTRAST].constraint.range = &percentage_range;
s->val[OPT_CONTRAST].w = 0;
/* resolution */
s->opt[OPT_RESOLUTION].name = SANE_NAME_SCAN_RESOLUTION;
s->opt[OPT_RESOLUTION].title = SANE_TITLE_SCAN_RESOLUTION;
s->opt[OPT_RESOLUTION].desc = SANE_DESC_SCAN_RESOLUTION;
s->opt[OPT_RESOLUTION].type = SANE_TYPE_INT;
s->opt[OPT_RESOLUTION].unit = SANE_UNIT_DPI;
s->opt[OPT_RESOLUTION].constraint_type = SANE_CONSTRAINT_RANGE;
s->opt[OPT_RESOLUTION].constraint.range = &s->hw->dpi_range;
s->val[OPT_RESOLUTION].w = s->hw->dpi_range.min;
/* "Geometry" group: */
s->opt[OPT_GEOMETRY_GROUP].title = "Geometry";
s->opt[OPT_GEOMETRY_GROUP].name = "Geometry Group";
s->opt[OPT_GEOMETRY_GROUP].desc = "";
s->opt[OPT_GEOMETRY_GROUP].type = SANE_TYPE_GROUP;
s->opt[OPT_GEOMETRY_GROUP].cap = SANE_CAP_ADVANCED;
/* top-left x */
s->opt[OPT_TL_X].name = SANE_NAME_SCAN_TL_X;
s->opt[OPT_TL_X].title = SANE_TITLE_SCAN_TL_X;
s->opt[OPT_TL_X].desc = SANE_DESC_SCAN_TL_X;
s->opt[OPT_TL_X].type = SANE_TYPE_FIXED;
s->opt[OPT_TL_X].unit = SANE_UNIT_MM;
s->opt[OPT_TL_X].constraint_type = SANE_CONSTRAINT_RANGE;
s->opt[OPT_TL_X].constraint.range = &s->hw->x_range;
s->val[OPT_TL_X].w = SANE_FIX(_DEFAULT_TLX);
/* top-left y */
s->opt[OPT_TL_Y].name = SANE_NAME_SCAN_TL_Y;
s->opt[OPT_TL_Y].title = SANE_TITLE_SCAN_TL_Y;
s->opt[OPT_TL_Y].desc = SANE_DESC_SCAN_TL_Y;
s->opt[OPT_TL_Y].type = SANE_TYPE_FIXED;
s->opt[OPT_TL_Y].unit = SANE_UNIT_MM;
s->opt[OPT_TL_Y].constraint_type = SANE_CONSTRAINT_RANGE;
s->opt[OPT_TL_Y].constraint.range = &s->hw->y_range;
s->val[OPT_TL_Y].w = SANE_FIX(_DEFAULT_TLY);
/* bottom-right x */
s->opt[OPT_BR_X].name = SANE_NAME_SCAN_BR_X;
s->opt[OPT_BR_X].title = SANE_TITLE_SCAN_BR_X;
s->opt[OPT_BR_X].desc = SANE_DESC_SCAN_BR_X;
s->opt[OPT_BR_X].type = SANE_TYPE_FIXED;
s->opt[OPT_BR_X].unit = SANE_UNIT_MM;
s->opt[OPT_BR_X].constraint_type = SANE_CONSTRAINT_RANGE;
s->opt[OPT_BR_X].constraint.range = &s->hw->x_range;
s->val[OPT_BR_X].w = SANE_FIX(_DEFAULT_BRX);
/* bottom-right y */
s->opt[OPT_BR_Y].name = SANE_NAME_SCAN_BR_Y;
s->opt[OPT_BR_Y].title = SANE_TITLE_SCAN_BR_Y;
s->opt[OPT_BR_Y].desc = SANE_DESC_SCAN_BR_Y;
s->opt[OPT_BR_Y].type = SANE_TYPE_FIXED;
s->opt[OPT_BR_Y].unit = SANE_UNIT_MM;
s->opt[OPT_BR_Y].constraint_type = SANE_CONSTRAINT_RANGE;
s->opt[OPT_BR_Y].constraint.range = &s->hw->y_range;
s->val[OPT_BR_Y].w = SANE_FIX(_DEFAULT_BRY);
/* CHANGE: disable some settings for the 9636T and the other models */
if(MODEL_OP_9636T != s->hw->model) {
s->opt[OPT_EXT_MODE].cap |= SANE_CAP_INACTIVE;
}
return SANE_STATUS_GOOD;
}
/*.............................................................................
*
*/
static SANE_Status attach( const char *dev_name, Plustek_Device **devp )
{
char *str;
int cntr;
int result;
int handle;
SANE_Status status;
Plustek_Device *dev;
ScannerCaps scaps;
DBG(_DBG_SANE_INIT, "attach (%s, %p)\n", dev_name, (void *)devp);
/* already attached ?*/
for( dev = first_dev; dev; dev = dev->next )
if (strcmp (dev->sane.name, dev_name) == 0) {
if (devp)
*devp = dev;
return SANE_STATUS_GOOD;
}
/*
* go ahead and open the scanner device
*/
handle = drvopen( dev_name );
if( handle < 0 ) {
return SANE_STATUS_IO_ERROR;
}
result = ioctl( handle, _PTDRV_GET_CAPABILITIES, &scaps);
if( result < 0 ) {
DBG( _DBG_ERROR, "ioctl _PTDRV_GET_CAPABILITIES failed(%d)\n", result);
close(handle);
return SANE_STATUS_IO_ERROR;
}
result = ioctl( handle, _PTDRV_GET_LENSINFO, &lens);
if( result < 0 ) {
DBG( _DBG_ERROR, "ioctl _PTDRV_GET_LENSINFO failed(%d)\n", result );
close(handle);
return SANE_STATUS_IO_ERROR;
}
/* did we fail on connection? */
if (scaps.wIOBase == _NO_BASE ) {
DBG( _DBG_ERROR, "failed to find Plustek scanner\n" );
close(handle);
return SANE_STATUS_INVAL;
}
/* allocate some memory for the device */
dev = malloc( sizeof (*dev));
if (!dev)
return SANE_STATUS_NO_MEM;
memset (dev, 0, sizeof (*dev));
dev->fd = -1;
dev->sane.name = strdup (dev_name);
dev->sane.vendor = "Plustek";
dev->sane.type = "flatbed scanner";
/* save the info we got from the driver */
dev->model = scaps.Model;
dev->asic = scaps.AsicID;
dev->max_y = scaps.wMaxExtentY*MM_PER_INCH/_MEASURE_BASE;
dev->res_list = (SANE_Int *) calloc(((lens.rDpiX.wMax -_DEF_DPI)/25 + 1),
sizeof (SANE_Int)); /* one more to avoid a buffer overflow */
if (NULL == dev->res_list) {
DBG( _DBG_ERROR, "alloc fail, resolution problem\n" );
close(handle);
return SANE_STATUS_INVAL;
}
dev->res_list_size = 0;
for (cntr = _DEF_DPI; cntr <= lens.rDpiX.wMax; cntr += 25) {
dev->res_list_size++;
dev->res_list[dev->res_list_size - 1] = (SANE_Int) cntr;
}
status = limitResolution( dev );
drvclose( handle );
str = malloc(_MODEL_STR_LEN);
if( NULL == str ) {
DBG(_DBG_ERROR,"attach: out of memory\n");
return SANE_STATUS_NO_MEM;
}
str[(_MODEL_STR_LEN-1)] = '\0';
str[0] = '\0';
/* error, give asic # */
if (scaps.Model > sizeof (ModelStr) / sizeof (*ModelStr)) {
sprintf (str, "ASIC ID = 0x%x", scaps.AsicID);
} else {
sprintf (str, ModelStr[scaps.Model]); /* lookup model string */
}
dev->sane.model = str;
dev->fd = handle;
DBG( _DBG_SANE_INIT, "attach: model = >%s<\n", dev->sane.model );
++num_devices;
dev->next = first_dev;
first_dev = dev;
if (devp)
*devp = dev;
return SANE_STATUS_GOOD;
}
/*.............................................................................
*
*/
static SANE_Status attach_one( const char *dev )
{
DBG( _DBG_SANE_INIT, "attach_one: >%s<\n", dev );
return attach(dev, 0);
}
/*.............................................................................
* intialize the backend
*/
SANE_Status sane_init( SANE_Int *version_code, SANE_Auth_Callback authorize )
{
char dev_name[PATH_MAX] = "/dev/pt_drv";
size_t len;
FILE *fp;
DBG_INIT();
#if defined PACKAGE && defined VERSION
DBG( _DBG_SANE_INIT, "sane_init: " PACKAGE " " VERSION "\n");
#endif
auth = authorize;
first_dev = NULL;
first_handle = NULL;
num_devices = 0;
if( version_code != NULL )
*version_code = SANE_VERSION_CODE(V_MAJOR, V_MINOR, 0);
fp = sanei_config_open( PLUSTEK_CONFIG_FILE );
/* default to /dev/pt_drv instead of insisting on config file */
if( NULL == fp ) {
return attach("/dev/pt_drv", 0);
}
while (sanei_config_read( dev_name, sizeof(dev_name), fp)) {
DBG( _DBG_SANE_INIT, "sane_init, >%s<\n", dev_name);
if( dev_name[0] == '#') /* ignore line comments */
continue;
len = strlen(dev_name);
if( dev_name[len - 1] == '\n' )
dev_name[--len] = '\0';
if( !len)
continue; /* ignore empty lines */
DBG( _DBG_SANE_INIT, "sane_init, >%s<\n", dev_name);
sanei_config_attach_matching_devices( dev_name, attach_one );
}
fclose (fp);
return SANE_STATUS_GOOD;
}
/*.............................................................................
* cleanup the backend...
*/
void sane_exit( void )
{
Plustek_Device *dev, *next;
DBG( _DBG_SANE_INIT, "sane_exit\n" );
for( dev = first_dev; dev; dev = next ) {
next = dev->next;
if( dev->sane.name )
free ((void *) dev->sane.name);
if( dev->sane.model )
free ((void *) dev->sane.model);
free (dev);
}
auth = NULL;
first_dev = NULL;
first_handle = NULL;
}
/*.............................................................................
* return a list of all devices
*/
SANE_Status sane_get_devices (const SANE_Device ***device_list,
SANE_Bool local_only )
{
static const SANE_Device **devlist = 0;
Plustek_Device *dev;
int i;
DBG(_DBG_SANE_INIT, "sane_get_devices (%p, %ld)\n", (void *) device_list,
(long) local_only);
/* already called, so cleanup */
if( devlist )
free( devlist );
devlist = malloc((num_devices + 1) * sizeof (devlist[0]));
if ( NULL == devlist )
return SANE_STATUS_NO_MEM;
i = 0;
for (dev = first_dev; i < num_devices; dev = dev->next)
devlist[i++] = &dev->sane;
devlist[i++] = 0;
*device_list = devlist;
return SANE_STATUS_GOOD;
}
/*.............................................................................
* open the sane device
*/
SANE_Status sane_open( SANE_String_Const devicename, SANE_Handle * handle )
{
SANE_Status status;
Plustek_Device *dev;
Plustek_Scanner *s;
DBG( _DBG_SANE_INIT, "sane_open\n" );
if (devicename[0]) {
for (dev = first_dev; dev; dev = dev->next)
if (strcmp (dev->sane.name, devicename) == 0)
break;
if (!dev) {
status = attach (devicename, &dev);
if (status != SANE_STATUS_GOOD)
return status;
}
} else {
/* empty devicename -> use first device */
dev = first_dev;
}
if (!dev)
return SANE_STATUS_INVAL;
s = malloc (sizeof (*s));
if (!s)
return SANE_STATUS_NO_MEM;
memset(s, 0, sizeof (*s));
s->pipe = -1;
s->hw = dev;
s->scanning = SANE_FALSE;
init_options(s);
/* insert newly opened handle into list of open handles: */
s->next = first_handle;
first_handle = s;
*handle = s;
return SANE_STATUS_GOOD;
}
/*.............................................................................
*
*/
void sane_close (SANE_Handle handle)
{
Plustek_Scanner *prev, *s;
DBG( _DBG_SANE_INIT, "sane_close\n" );
/* remove handle from list of open handles: */
prev = 0;
for( s = first_handle; s; s = s->next ) {
if( s == handle )
break;
prev = s;
}
if (!s) {
DBG( _DBG_ERROR, "close: invalid handle %p\n", handle);
return;
}
close_pipe( s );
if( NULL != s->buf )
free(s->buf);
drvclose( s->hw->fd );
s->hw->fd = -1;
if (prev)
prev->next = s->next;
else
first_handle = s->next;
free(s);
}
/*.............................................................................
*
*/
const SANE_Option_Descriptor *
sane_get_option_descriptor (SANE_Handle handle, SANE_Int option)
{
Plustek_Scanner *s = (Plustek_Scanner *) handle;
if (option < 0 || option >= NUM_OPTIONS)
return NULL;
return &(s->opt[option]);
}
/*.............................................................................
*
*/
static const SANE_String_Const *
search_string_list (const SANE_String_Const * list, SANE_String value)
{
while (*list != NULL && strcmp (value, *list) != 0)
++list;
if (*list == NULL)
return NULL;
return list;
}
/*.............................................................................
* return or set the parameter values, also do some checks
*/
SANE_Status sane_control_option( SANE_Handle handle, SANE_Int option,
SANE_Action action, void *value,
SANE_Int * info)
{
Plustek_Scanner *s = (Plustek_Scanner *)handle;
SANE_Status status;
const SANE_String_Const *optval;
if ( s->scanning ) {
return SANE_STATUS_DEVICE_BUSY;
}
if (option < 0 || option >= NUM_OPTIONS)
return SANE_STATUS_INVAL;
if (info != NULL)
*info = 0;
switch (action) {
case SANE_ACTION_GET_VALUE:
switch (option) {
case OPT_NUM_OPTS:
case OPT_RESOLUTION:
case OPT_TL_X:
case OPT_TL_Y:
case OPT_BR_X:
case OPT_BR_Y:
*(SANE_Word *)value = s->val[option].w;
break;
case OPT_CONTRAST:
case OPT_BRIGHTNESS:
*(SANE_Word *)value =
(s->val[option].w << SANE_FIXED_SCALE_SHIFT);
break;
case OPT_MODE:
case OPT_EXT_MODE:
case OPT_HALFTONE:
case OPT_DROPOUT:
strcpy ((char *) value,
s->opt[option].constraint.string_list[s->val[option].w]);
break;
default:
return SANE_STATUS_INVAL;
}
break;
case SANE_ACTION_SET_VALUE:
status = sanei_constrain_value( s->opt + option, value, info );
if (status != SANE_STATUS_GOOD) {
return status;
}
optval = NULL;
if (s->opt[option].constraint_type == SANE_CONSTRAINT_STRING_LIST) {
optval = search_string_list (s->opt[option].constraint.string_list,
(char *) value);
if (optval == NULL)
return SANE_STATUS_INVAL;
}
switch (option) {
case OPT_RESOLUTION: {
int n;
int min_d = s->hw->res_list[s->hw->res_list_size - 1];
int v = *(SANE_Word *)value;
int best = v;
for (n = 0; n < s->hw->res_list_size; n++) {
int d = abs (v - s->hw->res_list[n]);
if (d < min_d) {
min_d = d;
best = s->hw->res_list[n];
}
}
s->val[option].w = (SANE_Word)best;
if (info != NULL)
*info |= SANE_INFO_RELOAD_PARAMS;
break;
}
case OPT_TL_X:
case OPT_TL_Y:
case OPT_BR_X:
case OPT_BR_Y:
if( OPT_BR_Y == option ) {
if( *(SANE_Word *)value < s->val[OPT_TL_Y].w ) {
*(SANE_Word *)value = s->val[OPT_TL_Y].w;
if (info != NULL)
*info |= SANE_INFO_RELOAD_OPTIONS;
}
}
if( OPT_TL_Y == option ) {
if( *(SANE_Word *)value > s->val[OPT_BR_Y].w ) {
*(SANE_Word *)value = s->val[OPT_BR_Y].w;
if (info != NULL)
*info |= SANE_INFO_RELOAD_OPTIONS;
}
}
if( OPT_BR_X == option ) {
if( *(SANE_Word *)value < s->val[OPT_TL_X].w ) {
*(SANE_Word *)value = s->val[OPT_TL_X].w;
if (info != NULL)
*info |= SANE_INFO_RELOAD_OPTIONS;
}
}
if( OPT_TL_X == option ) {
if( *(SANE_Word *)value > s->val[OPT_BR_X].w ) {
*(SANE_Word *)value = s->val[OPT_BR_X].w;
if (info != NULL)
*info |= SANE_INFO_RELOAD_OPTIONS;
}
}
s->val[option].w = *(SANE_Word *)value;
if (info != NULL)
*info |= SANE_INFO_RELOAD_PARAMS;
break;
case OPT_CONTRAST:
case OPT_BRIGHTNESS:
s->val[option].w =
((*(SANE_Word *)value) >> SANE_FIXED_SCALE_SHIFT);
break;
case OPT_MODE:
if(mode_params[optval - mode_list].scanmode != COLOR_HALFTONE){
s->opt[OPT_HALFTONE].cap |= SANE_CAP_INACTIVE;
s->opt[OPT_CONTRAST].cap &= ~SANE_CAP_INACTIVE;
} else {
s->opt[OPT_HALFTONE].cap &= ~SANE_CAP_INACTIVE;
s->opt[OPT_CONTRAST].cap |= SANE_CAP_INACTIVE;
}
#if 0
if (mode_params[optval - mode_list].color) {
s->opt[OPT_DROPOUT].cap |= SANE_CAP_INACTIVE;
} else {
s->opt[OPT_DROPOUT].cap &= ~SANE_CAP_INACTIVE;
}
#endif
if (info != NULL)
*info |= SANE_INFO_RELOAD_OPTIONS | SANE_INFO_RELOAD_PARAMS;
/* fall through */
case OPT_HALFTONE:
case OPT_DROPOUT:
s->val[option].w = optval - s->opt[option].constraint.string_list;
break;
case OPT_EXT_MODE:
s->val[option].w = optval - s->opt[option].constraint.string_list;
/*
* change the area and mode_list when changing the source
*/
if( s->val[option].w == 0 ) {
s->hw->dpi_range.min = _DEF_DPI;
s->hw->x_range.max = SANE_FIX(_NORMAL_X);
s->hw->y_range.max = SANE_FIX(s->hw->max_y);
s->val[OPT_TL_X].w = SANE_FIX(_DEFAULT_TLX);
s->val[OPT_TL_Y].w = SANE_FIX(_DEFAULT_TLY);
s->val[OPT_BR_X].w = SANE_FIX(_DEFAULT_BRX);
s->val[OPT_BR_Y].w = SANE_FIX(_DEFAULT_BRY);
if((MODEL_OP_9636T == s->hw->model) ||
(MODEL_OP_9636P == s->hw->model) ||
(MODEL_OP_9636PP == s->hw->model)) {
s->opt[OPT_MODE].constraint.string_list = mode_9636_list;
} else {
s->opt[OPT_MODE].constraint.string_list = mode_list;
}
s->val[OPT_MODE].w = 3; /* _COLOR_TRUE24 */
} else {
s->hw->dpi_range.min = _TPAMinDpi;
if( s->val[option].w == 1 ) {
s->hw->x_range.max = SANE_FIX(_TP_X);
s->hw->y_range.max = SANE_FIX(_TP_Y);
s->val[OPT_TL_X].w = SANE_FIX(_DEFAULT_TP_TLX);
s->val[OPT_TL_Y].w = SANE_FIX(_DEFAULT_TP_TLY);
s->val[OPT_BR_X].w = SANE_FIX(_DEFAULT_TP_BRX);
s->val[OPT_BR_Y].w = SANE_FIX(_DEFAULT_TP_BRY);
} else {
s->hw->x_range.max = SANE_FIX(_NEG_X);
s->hw->y_range.max = SANE_FIX(_NEG_Y);
s->val[OPT_TL_X].w = SANE_FIX(_DEFAULT_NEG_TLX);
s->val[OPT_TL_Y].w = SANE_FIX(_DEFAULT_NEG_TLY);
s->val[OPT_BR_X].w = SANE_FIX(_DEFAULT_NEG_BRX);
s->val[OPT_BR_Y].w = SANE_FIX(_DEFAULT_NEG_BRY);
}
if( MODEL_OP_9636T == s->hw->model ) {
s->opt[OPT_MODE].constraint.string_list =
&mode_9636_list[_TPAModeSupportMin];
} else {
s->opt[OPT_MODE].constraint.string_list =
&mode_list[_TPAModeSupportMin];
}
s->val[OPT_MODE].w = 1; /* _COLOR_TRUE24 */
}
s->opt[OPT_HALFTONE].cap |= SANE_CAP_INACTIVE;
/* s->opt[OPT_DROPOUT].cap |= SANE_CAP_INACTIVE;
*/
s->opt[OPT_CONTRAST].cap &= ~SANE_CAP_INACTIVE;
if (info != NULL)
*info |= SANE_INFO_RELOAD_OPTIONS | SANE_INFO_RELOAD_PARAMS;
break;
default:
return SANE_STATUS_INVAL;
}
break;
default:
return SANE_STATUS_INVAL;
}
return SANE_STATUS_GOOD;
}
/*.............................................................................
* return the current parameter settings
*/
SANE_Status sane_get_parameters (SANE_Handle handle, SANE_Parameters * params)
{
int ndpi;
pModeParam mp;
Plustek_Scanner *s = (Plustek_Scanner *)handle;
/* if we're calling from within, calc best guess */
if (NULL == params) {
mp = getModeList( s );
memset( &s->params, 0, sizeof (SANE_Parameters));
ndpi = s->val[OPT_RESOLUTION].w;
s->params.pixels_per_line = SANE_UNFIX(s->val[OPT_BR_X].w -
s->val[OPT_TL_X].w) / MM_PER_INCH * ndpi;
s->params.lines = SANE_UNFIX( s->val[OPT_BR_Y].w -
s->val[OPT_TL_Y].w) / MM_PER_INCH * ndpi;
/* pixels_per_line seems to be 8 * n. */
/* s->params.pixels_per_line = s->params.pixels_per_line & ~7; debug only */
s->params.last_frame = SANE_TRUE;
s->params.depth = mp[s->val[OPT_MODE].w].depth;
if (mp[s->val[OPT_MODE].w].color) {
s->params.format = SANE_FRAME_RGB;
s->params.bytes_per_line = 3 * s->params.pixels_per_line;
} else {
s->params.format = SANE_FRAME_GRAY;
if (s->params.depth == 1)
s->params.bytes_per_line = (s->params.pixels_per_line + 7) / 8;
else
s->params.bytes_per_line = s->params.pixels_per_line *
s->params.depth / 8;
}
} else
*params = s->params;
return SANE_STATUS_GOOD;
}
/*.............................................................................
* initiate the scan process
*/
SANE_Status sane_start( SANE_Handle handle )
{
Plustek_Scanner *s = (Plustek_Scanner *) handle;
pModeParam mp;
int result;
int ndpi;
int left, top;
int width, height;
int scanmode;
int fds[2];
ScannerCaps scaps;
StartScan start;
CmdBlk cb;
CropInfo crop;
SANE_Status status;
DBG( _DBG_SANE_INIT, "sane_start\n" );
if( s->scanning ) {
return SANE_STATUS_DEVICE_BUSY;
}
status = sane_get_parameters (handle, NULL);
if (status != SANE_STATUS_GOOD) {
DBG( _DBG_ERROR, "sane_get_parameters failed\n" );
return status;
}
/*
* open the driver and get some information about the scanner
*/
s->hw->fd = drvopen ( s->hw->sane.name );
if( s->hw->fd < 0 ) {
DBG( _DBG_ERROR,"sane_start: open failed: %d\n", errno );
if( errno == EBUSY )
return SANE_STATUS_DEVICE_BUSY;
return SANE_STATUS_IO_ERROR;
}
result = ioctl( s->hw->fd, _PTDRV_GET_CAPABILITIES, &scaps);
if( result < 0 ) {
DBG( _DBG_ERROR, "ioctl _PTDRV_GET_CAPABILITIES failed(%d)\n", result);
close( s->hw->fd );
return SANE_STATUS_IO_ERROR;
}
result = ioctl( s->hw->fd, _PTDRV_GET_LENSINFO, &lens);
if( result < 0 ) {
DBG( _DBG_ERROR, "ioctl _PTDRV_GET_LENSINFO failed(%d)\n", result );
close(s->hw->fd);
return SANE_STATUS_IO_ERROR;
}
/* did we fail on connection? */
if (scaps.wIOBase == _NO_BASE ) {
DBG( _DBG_ERROR, "failed to find Plustek scanner\n" );
close(s->hw->fd);
return SANE_STATUS_INVAL;
}
/* All ready to go. Set and image def and see what the scanner
* says for crop info. Of course I ignore this, too...
*/
ndpi = s->val[OPT_RESOLUTION].w;
/* position and extent are always relative to 300 dpi */
left = (int)(SANE_UNFIX (s->val[OPT_TL_X].w)*(double)lens.rDpiX.wPhyMax/
(MM_PER_INCH*((double)lens.rDpiX.wPhyMax/300.0)));
top = (int)(SANE_UNFIX (s->val[OPT_TL_Y].w)*(double)lens.rDpiY.wPhyMax/
(MM_PER_INCH*((double)lens.rDpiY.wPhyMax/300.0)));
width = (int)(SANE_UNFIX (s->val[OPT_BR_X].w - s->val[OPT_TL_X].w) *
(double)lens.rDpiX.wPhyMax /
(MM_PER_INCH *((double)lens.rDpiX.wPhyMax/300.0)));
height = (int)(SANE_UNFIX (s->val[OPT_BR_Y].w - s->val[OPT_TL_Y].w) *
(double)lens.rDpiY.wPhyMax /
(MM_PER_INCH *((double)lens.rDpiY.wPhyMax/300.0)));
/*
* adjust mode list according to the model we use and the
* source we have
*/
mp = getModeList( s );
scanmode = mp[s->val[OPT_MODE].w].scanmode;
/* clear it out just in case */
memset (&cb, 0, sizeof (cb));
cb.ucmd.cInf.ImgDef.xyDpi.x = ndpi;
cb.ucmd.cInf.ImgDef.xyDpi.y = ndpi;
cb.ucmd.cInf.ImgDef.crArea.x = left; /* offset from left edge to area you want to scan */
cb.ucmd.cInf.ImgDef.crArea.y = top; /* offset from top edge to area you want to scan */
cb.ucmd.cInf.ImgDef.crArea.cx = width; /* always relative to 300 dpi */
cb.ucmd.cInf.ImgDef.crArea.cy = height;
cb.ucmd.cInf.ImgDef.wDataType = scanmode;
/*
* CHECK: what about the 10 bit mode
*/
if( COLOR_TRUE48 == scanmode )
cb.ucmd.cInf.ImgDef.wBits = OUTPUT_12Bits;
else if( COLOR_TRUE32 == scanmode )
cb.ucmd.cInf.ImgDef.wBits = OUTPUT_10Bits;
else
cb.ucmd.cInf.ImgDef.wBits = OUTPUT_8Bits;
cb.ucmd.cInf.ImgDef.dwFlag = SCANDEF_QualityScan;
switch( s->val[OPT_EXT_MODE].w ) {
case 1: cb.ucmd.cInf.ImgDef.dwFlag |= SCANDEF_Transparency; break;
case 2: cb.ucmd.cInf.ImgDef.dwFlag |= SCANDEF_Negative; break;
default: break;
}
cb.ucmd.cInf.ImgDef.wLens = scaps.wLens;
result = ioctl( s->hw->fd, _PTDRV_PUT_IMAGEINFO, &cb);
if( result < 0 ) {
DBG( _DBG_ERROR, "ioctl _PTDRV_PUT_IMAGEINFO failed(%d)\n", result );
close(s->hw->fd);
return SANE_STATUS_IO_ERROR;
}
result = ioctl(s->hw->fd, _PTDRV_GET_CROPINFO, &crop);
if( result < 0 ) {
DBG( _DBG_ERROR, "ioctl _PTDRV_GET_CROPINFO failed(%d)\n", result );
close(s->hw->fd);
return SANE_STATUS_IO_ERROR;
}
/* DataInf.dwAppPixelsPerLine = crop.dwPixelsPerLine; get calc'd pixels per line */
s->params.pixels_per_line = crop.dwPixelsPerLine;
s->params.bytes_per_line = crop.dwBytesPerLine; /* get calc'd bytes per line */
s->params.lines = crop.dwLinesPerArea; /* get calc'd lines per area */
/* build a SCANINFO block and get ready to scan it */
cb.ucmd.sInf.ImgDef.xyDpi.x = ndpi;
cb.ucmd.sInf.ImgDef.xyDpi.y = ndpi;
cb.ucmd.sInf.ImgDef.crArea.x = left;
cb.ucmd.sInf.ImgDef.crArea.y = top;
cb.ucmd.sInf.ImgDef.crArea.cx = width;
cb.ucmd.sInf.ImgDef.crArea.cy = height;
cb.ucmd.sInf.ImgDef.wDataType = scanmode;
if( COLOR_TRUE48 == scanmode )
cb.ucmd.sInf.ImgDef.wBits = OUTPUT_12Bits;
else if( COLOR_TRUE32 == scanmode )
cb.ucmd.sInf.ImgDef.wBits = OUTPUT_10Bits;
else
cb.ucmd.sInf.ImgDef.wBits = OUTPUT_8Bits;
cb.ucmd.sInf.ImgDef.dwFlag = (SCANDEF_BuildBwMap | SCANDEF_QualityScan);
/*
* cb.ucmd.sInf.ImgDef.dwFlag |= SCANDEF_Inverse;
*/
switch( s->val[OPT_EXT_MODE].w ) {
case 1: cb.ucmd.sInf.ImgDef.dwFlag |= SCANDEF_Transparency; break;
case 2: cb.ucmd.sInf.ImgDef.dwFlag |= SCANDEF_Negative; break;
default: break;
}
cb.ucmd.sInf.ImgDef.wLens = 1;
cb.ucmd.sInf.siBrightness = s->val[OPT_BRIGHTNESS].w;
cb.ucmd.sInf.siContrast = s->val[OPT_CONTRAST].w;
cb.ucmd.sInf.wDither = s->val[OPT_HALFTONE].w;
DBG( _DBG_SANE_INIT, "bright %i contrast %i\n", cb.ucmd.sInf.siBrightness,
cb.ucmd.sInf.siContrast);
result = ioctl(s->hw->fd, _PTDRV_SET_ENV, &cb.ucmd.sInf);
if( result < 0 ) {
DBG( _DBG_ERROR, "ioctl _PTDRV_SET_ENV failed(%d)\n", result );
close(s->hw->fd);
return SANE_STATUS_IO_ERROR;
}
result = ioctl(s->hw->fd, _PTDRV_START_SCAN, &start);
if( result < 0 ) {
DBG( _DBG_ERROR, "ioctl _PTDRV_START_SCAN failed(%d)\n", result );
close(s->hw->fd);
return SANE_STATUS_IO_ERROR;
}
DBG( _DBG_SANE_INIT, "dwflag = 0x%lx dwBytesPerLine = %ld, "
"dwLinesPerScan = %ld\n",
start.dwFlag, start.dwBytesPerLine, start.dwLinesPerScan);
s->buf = realloc( s->buf, (s->params.lines) * s->params.bytes_per_line );
if( NULL == s->buf ) {
DBG( _DBG_ERROR, "realloc failed\n" );
close(s->hw->fd);
return SANE_STATUS_NO_MEM;
}
s->scanning = SANE_TRUE;
tsecs = (unsigned long)time(NULL);
DBG( _DBG_INFO, "TIME START\n" );
/*
* everything prepared, so start the child process and a pipe to communicate
* pipe --> fds[0]=read-fd, fds[1]=write-fd
*/
if( pipe(fds) < 0 ) {
DBG( _DBG_ERROR, "ERROR: could not create pipe\n" );
s->scanning = SANE_FALSE;
close(s->hw->fd);
return SANE_STATUS_IO_ERROR;
}
/* create reader routine as new process */
s->bytes_read = 0;
s->reader_pid = fork();
if( s->reader_pid < 0 ) {
DBG( _DBG_ERROR, "ERROR: could not create child process\n" );
s->scanning = SANE_FALSE;
close(s->hw->fd);
return SANE_STATUS_IO_ERROR;
}
/* reader_pid = 0 ===> child process */
if ( 0 == s->reader_pid ) {
sigset_t ignore_set;
struct SIGACTION act;
DBG( _DBG_SANE_INIT, "reader process...\n" );
close(fds[0]);
sigfillset ( &ignore_set );
sigdelset ( &ignore_set, SIGTERM );
sigprocmask( SIG_SETMASK, &ignore_set, 0 );
memset ( &act, 0, sizeof (act));
sigaction( SIGTERM, &act, 0 );
status = reader_process( s, fds[1] );
DBG( _DBG_SANE_INIT, "reader process done, status = %i\n", status );
/* don't use exit() since that would run the atexit() handlers */
_exit( status );
}
signal( SIGCHLD, sig_chldhandler );
close(fds[1]);
s->pipe = fds[0];
DBG( _DBG_SANE_INIT, "sane_start done\n" );
return SANE_STATUS_GOOD;
}
/*.............................................................................
* function to read the data from our child process
*/
SANE_Status sane_read( SANE_Handle handle, SANE_Byte *data,
SANE_Int max_length, SANE_Int *length )
{
Plustek_Scanner *s = (Plustek_Scanner *)handle;
ssize_t nread;
*length = 0;
nread = read( s->pipe, data, max_length );
DBG( _DBG_READ, "sane_read - read %ld bytes\n", (long)nread );
if (!(s->scanning)) {
return do_cancel( s, SANE_TRUE );
}
if (nread < 0) {
if (errno == EAGAIN) {
if( s->bytes_read ==
(unsigned long)(s->params.lines * s->params.bytes_per_line)) {
waitpid( s->reader_pid, 0, 0 );
s->reader_pid = -1;
drvclose( s->hw->fd );
s->hw->fd = -1;
return close_pipe(s);
}
return SANE_STATUS_GOOD;
} else {
DBG( _DBG_ERROR, "ERROR: errno=%d\n", errno );
do_cancel( s, SANE_TRUE );
return SANE_STATUS_IO_ERROR;
}
}
*length = nread;
s->bytes_read += nread;
if (0 == nread) {
drvclose( s->hw->fd );
s->hw->fd = -1;
return close_pipe(s);
}
return SANE_STATUS_GOOD;
}
/*.............................................................................
* cancel the scanning process
*/
void sane_cancel (SANE_Handle handle)
{
Plustek_Scanner *s = (Plustek_Scanner *)handle;
DBG( _DBG_SANE_INIT, "sane_cancel\n" );
if( s->scanning ) {
do_cancel( s, SANE_FALSE );
}
}
/*.............................................................................
* set the pipe to blocking/non blocking mode
*/
SANE_Status sane_set_io_mode (SANE_Handle handle, SANE_Bool non_blocking)
{
Plustek_Scanner *s = (Plustek_Scanner *)handle;
DBG( _DBG_SANE_INIT, "sane_set_io_mode: non_blocking=%d\n",non_blocking );
if ( !s->scanning ) {
DBG( _DBG_ERROR, "ERROR: not scanning !\n" );
return SANE_STATUS_INVAL;
}
if (fcntl (s->pipe, F_SETFL, non_blocking ? O_NONBLOCK : 0) < 0) {
DBG( _DBG_ERROR, "ERROR: can<61>t set to non-blocking mode !\n" );
return SANE_STATUS_IO_ERROR;
}
DBG( _DBG_SANE_INIT, "sane_set_io_mode done\n" );
return SANE_STATUS_GOOD;
}
/*.............................................................................
* return the descriptor if available
*/
SANE_Status sane_get_select_fd( SANE_Handle handle, SANE_Int * fd )
{
Plustek_Scanner *s = (Plustek_Scanner *)handle;
DBG( _DBG_SANE_INIT, "sane_get_select_fd\n" );
if ( !s->scanning ) {
DBG( _DBG_ERROR, "ERROR: not scanning !\n" );
return SANE_STATUS_INVAL;
}
*fd = s->pipe;
DBG( _DBG_SANE_INIT, "sane_get_select_fd done\n" );
return SANE_STATUS_GOOD;
}
/* END PLUSTEK.C ............................................................*/
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