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Diffstat (limited to 'backend/plustek_pp.c')
| -rw-r--r-- | backend/plustek_pp.c | 2180 |
1 files changed, 2180 insertions, 0 deletions
diff --git a/backend/plustek_pp.c b/backend/plustek_pp.c new file mode 100644 index 0000000..bf4c0d0 --- /dev/null +++ b/backend/plustek_pp.c @@ -0,0 +1,2180 @@ +/** @file plustek_pp.c + * @brief SANE backend for Plustek parallelport scanner + * + * Based on Kazuhiro Sasayama previous work on + * plustek.[ch] file from the SANE package.<br> + * Original code taken from sane-0.71<br> + * Copyright (C) 1997 Hypercore Software Design, Ltd.<br> + * Also based on the work done by Rick Bronson<br> + * Copyright (C) 2000-2013 Gerhard Jaeger <gerhard@gjaeger.de><br> + * + * History: + * - 0.01 - initial version, imported from the kernel-module 0.42-11 + * - 0.43 - bumped up version to reflect the former module code version + * - 0.44 - bumped up version to reflect the recent changes + * - minor cleanup + *. + * <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> + */ + +/** @mainpage + * @verbinclude Plustek-PARPORT.txt + */ + +#ifdef _AIX +# include "../include/lalloca.h" /* MUST come first for AIX! */ +#endif + +#include "../include/sane/config.h" +#include "../include/lalloca.h" + +#include <errno.h> +#include <fcntl.h> +#include <limits.h> +#include <signal.h> +#include <stdlib.h> +#include <string.h> +#include <ctype.h> +#include <unistd.h> +#include <time.h> +#include <math.h> +#include <stdint.h> + +#include <sys/time.h> +#include <sys/types.h> +#include <sys/ioctl.h> + +#include "../include/sane/sane.h" +#include "../include/sane/sanei.h" +#include "../include/sane/saneopts.h" + +#define BACKEND_VERSION "0.44-1" +#define BACKEND_NAME plustek_pp +#include "../include/sane/sanei_backend.h" +#include "../include/sane/sanei_config.h" +#include "../include/sane/sanei_thread.h" +#include "../include/sane/sanei_pp.h" + +#define _BACKEND_ENABLED +#define _USER_MODE + +#include "plustek-pp.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_INFO2 13 +#define _DBG_DUMP 20 +#define _DBG_READ 25 + +/*****************************************************************************/ + +/* + * see plustek-share.h + */ +MODELSTR; + +#ifdef _BACKEND_ENABLED +#ifndef NDEBUG +# define DEBUG +#endif + +/* I know this is in general no good idea, but it works */ +# include "plustek-pp_io.c" +# include "plustek-pp_dac.c" +# include "plustek-pp_detect.c" +# include "plustek-pp_genericio.c" +# include "plustek-pp_image.c" +# include "plustek-pp_map.c" +# include "plustek-pp_misc.c" +# include "plustek-pp_models.c" +# include "plustek-pp_motor.c" +# include "plustek-pp_p12.c" +# include "plustek-pp_p12ccd.c" +# include "plustek-pp_p48xx.c" +# include "plustek-pp_p9636.c" +# include "plustek-pp_procfs.c" +# include "plustek-pp_scale.c" +# include "plustek-pp_tpa.c" + +#define _DEFAULT_DEVICE "0x378" +#else +#define _DEFAULT_DEVICE "/dev/pt_drv" +#endif + +#ifdef _BACKEND_ENABLED +# include "plustek-pp_ptdrv.c" +#endif + +#include "plustek-pp_wrapper.c" + + +/************************** global vars **************************************/ + +static int num_devices; +static Plustek_Device *first_dev; +static Plustek_Scanner *first_handle; +static const SANE_Device **devlist = 0; +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_9800x_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[] = +{ + SANE_VALUE_SCAN_MODE_LINEART, + SANE_VALUE_SCAN_MODE_HALFTONE, + SANE_VALUE_SCAN_MODE_GRAY, + SANE_VALUE_SCAN_MODE_COLOR, + NULL +}; + +static const SANE_String_Const mode_9800x_list[] = +{ + SANE_VALUE_SCAN_MODE_LINEART, + SANE_VALUE_SCAN_MODE_HALFTONE, + SANE_VALUE_SCAN_MODE_GRAY, + SANE_VALUE_SCAN_MODE_COLOR, + SANE_I18N("Color36"), + NULL +}; + +static const SANE_String_Const ext_mode_list[] = +{ + SANE_I18N("Normal"), + SANE_I18N("Transparency"), + SANE_I18N("Negative"), + NULL +}; + +static const SANE_String_Const halftone_list[] = +{ + SANE_I18N("Dithermap 1"), + SANE_I18N("Dithermap 2"), + SANE_I18N("Randomize"), + 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}; + +/* authorization stuff */ +static SANE_Auth_Callback auth = NULL; + +/****************************** the backend... *******************************/ + +#define _YN(x) (x?"yes":"no") + +/** + * function to display the configuration options for the current device + * @param cnf - pointer to the configuration structure whose content should be + * displayed + */ +static void show_cnf( pCnfDef cnf ) +{ + DBG( _DBG_SANE_INIT,"Device configuration:\n" ); + DBG( _DBG_SANE_INIT,"device name : >%s<\n", cnf->devName ); + DBG( _DBG_SANE_INIT,"direct I/O : %s\n", _YN(cnf->adj.direct_io )); + DBG( _DBG_SANE_INIT,"warmup : %ds\n", cnf->adj.warmup ); + DBG( _DBG_SANE_INIT,"lampOff : %d\n", cnf->adj.lampOff ); + DBG( _DBG_SANE_INIT,"lampOffOnEnd : %s\n", _YN(cnf->adj.lampOffOnEnd )); + DBG( _DBG_SANE_INIT,"model override: %d\n", cnf->adj.mov ); + DBG( _DBG_SANE_INIT,"---------------------\n" ); +} + +/** open the device specific driver and reset the internal timing stuff + * @param dev - pointer to the device specific structure + * @return the function returns the result of the open call, on success + * of course the handle + */ +static int drvopen( Plustek_Device *dev ) +{ + int handle; + + DBG( _DBG_INFO, "drvopen()\n" ); + + handle = dev->open((const char*)dev->name, (void *)dev ); + + tsecs = 0; + + return handle; +} + +/** Calls the device specific stop and close functions. + * @param dev - pointer to the device specific structure + * @return The function always returns SANE_STATUS_GOOD + */ +static SANE_Status drvclose( Plustek_Device *dev ) +{ + short int_cnt; + + if( dev->fd >= 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; + dev->stopScan( dev, &int_cnt ); + dev->close( dev ); + } + dev->fd = -1; + + 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((_ASIC_IS_98003 == scanner->hw->caps.AsicID) || + (_ASIC_IS_98001 == scanner->hw->caps.AsicID)) { + mp = mode_9800x_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->r_pipe >= 0 ) { + + DBG( _DBG_PROC, "close r_pipe\n" ); + close( scanner->r_pipe ); + scanner->r_pipe = -1; + } + if( scanner->w_pipe >= 0 ) { + + DBG( _DBG_PROC, "close w_pipe\n" ); + close( scanner->w_pipe ); + scanner->w_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 signo ) +{ + DBG( _DBG_PROC, "reader_process: terminated by signal %d\n", signo ); + _exit( SANE_STATUS_GOOD ); +} + +static RETSIGTYPE sigalarm_handler( int signo ) +{ + _VAR_NOT_USED( signo ); + DBG( _DBG_PROC, "ALARM!!!\n" ); +} + +/** executed as a child process + * read the data from the driver and send them to the parent process + */ +static int reader_process( void *args ) +{ + int line; + unsigned long status; + unsigned long data_length; + struct SIGACTION act; + sigset_t ignore_set; + Plustek_Scanner *scanner = (Plustek_Scanner *)args; + + if( sanei_thread_is_forked()) { + DBG( _DBG_PROC, "reader_process started (forked)\n" ); + close( scanner->r_pipe ); + scanner->r_pipe = -1; + } else { + DBG( _DBG_PROC, "reader_process started (as thread)\n" ); + } + + sigfillset ( &ignore_set ); + sigdelset ( &ignore_set, SIGTERM ); +#if defined (__APPLE__) && defined (__MACH__) + sigdelset ( &ignore_set, SIGUSR2 ); +#endif + sigprocmask( SIG_SETMASK, &ignore_set, 0 ); + + memset ( &act, 0, sizeof (act)); + sigaction( SIGTERM, &act, 0 ); + + /* install the signal handler */ + sigemptyset(&(act.sa_mask)); + act.sa_flags = 0; + + 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... */ + if( scanner->hw->readImage ) { + + status = (unsigned long)scanner->hw->readImage( scanner->hw, + scanner->buf, data_length); + } else { + + unsigned char *buf = scanner->buf; + + + status = scanner->hw->prepare( scanner->hw, buf ); + + if( 0 == status ) { + + for( line = 0; line < scanner->params.lines; line++ ) { + + status = scanner->hw->readLine( scanner->hw ); + if((int)status < 0 ) { + break; + } + + write( scanner->w_pipe, buf, scanner->params.bytes_per_line ); + + buf += scanner->params.bytes_per_line; + } + } + } + + /* 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, status = %i, errno %i\n", + (int)status, errno ); + if( -9009 == (int)status ) + return SANE_STATUS_CANCELLED; + + if( errno == EBUSY ) + return SANE_STATUS_DEVICE_BUSY; + + return SANE_STATUS_IO_ERROR; + } + + /* send to parent */ + if( scanner->hw->readImage ) { + DBG( _DBG_PROC, "sending %lu bytes to parent\n", status ); + write( scanner->w_pipe, scanner->buf, status ); + } + + 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 ) +{ + struct SIGACTION act; + SANE_Pid res; + short int_cnt; + + DBG( _DBG_PROC,"do_cancel\n" ); + + scanner->scanning = SANE_FALSE; + + if( scanner->reader_pid != -1 ) { + + DBG( _DBG_PROC, ">>>>>>>> killing reader_process <<<<<<<<\n" ); + + /* tell the driver to stop scanning */ + if( -1 != scanner->hw->fd ) { + int_cnt = 1; + scanner->hw->stopScan( scanner->hw, &int_cnt ); + } + + sigemptyset(&(act.sa_mask)); + act.sa_flags = 0; + + act.sa_handler = sigalarm_handler; + sigaction( SIGALRM, &act, 0 ); + + /* kill our child process and wait until done */ + sanei_thread_kill( scanner->reader_pid ); + + /* give'em 10 seconds 'til done...*/ + alarm(10); + res = sanei_thread_waitpid( scanner->reader_pid, 0 ); + alarm(0); + + if( res != scanner->reader_pid ) { + DBG( _DBG_PROC,"sanei_thread_waitpid() failed !\n"); + + /* do it the hard way...*/ +#ifdef USE_PTHREAD + sanei_thread_kill( scanner->reader_pid ); +#else + sanei_thread_sendsig( scanner->reader_pid, SIGKILL ); +#endif + } + + scanner->reader_pid = -1; + DBG( _DBG_PROC,"reader_process killed\n"); + } + + if( SANE_TRUE == closepipe ) { + close_pipe( scanner ); + } + + drvclose( scanner->hw ); + + if( tsecs != 0 ) { + DBG( _DBG_INFO, "TIME END 2: %lus\n", time(NULL)-tsecs); + tsecs = 0; + } + + return SANE_STATUS_CANCELLED; +} + +/** because of some internal problems (inside the parport driver), we have to + * limit the max resolution to optical resolution. This is done by this + * function + * @param dev - pointer to the device specific structure + * @return The function always returns SANE_STATUS_GOOD + */ +static void limitResolution( Plustek_Device *dev ) +{ + dev->dpi_range.min = _DEF_DPI; + if( dev->dpi_range.min < _DEF_DPI ) + dev->dpi_range.min = _DEF_DPI; + + /* + * CHANGE: limit resolution to max. physical available one + * Note: the resolution for the Asic 96001/3 models is limited to + * the X-Resolution + */ + if((_ASIC_IS_96003 == dev->caps.AsicID) || + (_ASIC_IS_96001 == dev->caps.AsicID)) { + dev->dpi_range.max = lens.rDpiX.wPhyMax; + } else { + dev->dpi_range.max = lens.rDpiY.wPhyMax; + } + + dev->dpi_range.quant = 0; + dev->x_range.min = 0; + dev->x_range.max = SANE_FIX(dev->max_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; +} + +/** Currently we support only LM9831/2/3 chips and these use the same + * sizes... + * @param s - pointer to the scanner specific structure + * @return The function always returns SANE_STATUS_GOOD + */ +static SANE_Status initGammaSettings( Plustek_Scanner *s ) +{ + int i, j, val; + double gamma; + + /* + * this setting is common to the ASIC98001/3 and + * LM9831/2/3 based devices + * older parallelport devices use 256 entries + */ + s->gamma_length = 4096; + s->gamma_range.min = 0; + s->gamma_range.max = 255; + s->gamma_range.quant = 0; + + if((_ASIC_IS_96003 == s->hw->caps.AsicID) || + (_ASIC_IS_96001 == s->hw->caps.AsicID)) { + + s->gamma_length = 256; + } + + DBG( _DBG_INFO, "Presetting Gamma tables (len=%u)\n", s->gamma_length ); + DBG( _DBG_INFO, "----------------------------------\n" ); + + /* + * preset the gamma maps + */ + for( i = 0; i < 4; i++ ) { + + switch( i ) { + case 1: gamma = s->hw->adj.rgamma; break; + case 2: gamma = s->hw->adj.ggamma; break; + case 3: gamma = s->hw->adj.bgamma; break; + default: gamma = s->hw->adj.graygamma; break; + } + + for( j = 0; j < s->gamma_length; j++ ) { + + val = (s->gamma_range.max * + pow((double) j / ((double)s->gamma_length - 1.0), + 1.0 / gamma )); + + if( val > s->gamma_range.max ) + val = s->gamma_range.max; + + s->gamma_table[i][j] = val; + } + } + + return SANE_STATUS_GOOD; +} + +/** Check the gamma vectors we got back and limit if necessary + * @param s - pointer to the scanner specific structure + * @return nothing + */ +static void checkGammaSettings( Plustek_Scanner *s ) +{ + int i, j; + + for( i = 0; i < 4 ; i++ ) { + for( j = 0; j < s->gamma_length; j++ ) { + if( s->gamma_table[i][j] > s->gamma_range.max ) { + s->gamma_table[i][j] = s->gamma_range.max; + } + } + } +} + +/** 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].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 = "scanmode-group"; + s->opt[OPT_MODE_GROUP].title = SANE_I18N("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((_ASIC_IS_98001 == s->hw->caps.AsicID) || + (_ASIC_IS_98003 == s->hw->caps.AsicID)) { + s->opt[OPT_MODE].constraint.string_list = mode_9800x_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 = SANE_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_PATTERN; + s->opt[OPT_HALFTONE].title = SANE_TITLE_HALFTONE; + s->opt[OPT_HALFTONE].desc = SANE_DESC_HALFTONE_PATTERN; + 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; + + /* brightness */ + s->opt[OPT_BRIGHTNESS].name = SANE_NAME_BRIGHTNESS; + s->opt[OPT_BRIGHTNESS].title = SANE_TITLE_BRIGHTNESS; + s->opt[OPT_BRIGHTNESS].desc = SANE_DESC_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; + + /* custom-gamma table */ + s->opt[OPT_CUSTOM_GAMMA].name = SANE_NAME_CUSTOM_GAMMA; + s->opt[OPT_CUSTOM_GAMMA].title = SANE_TITLE_CUSTOM_GAMMA; + s->opt[OPT_CUSTOM_GAMMA].desc = SANE_DESC_CUSTOM_GAMMA; + s->opt[OPT_CUSTOM_GAMMA].type = SANE_TYPE_BOOL; + s->val[OPT_CUSTOM_GAMMA].w = SANE_FALSE; + + /* preview */ + s->opt[OPT_PREVIEW].name = SANE_NAME_PREVIEW; + s->opt[OPT_PREVIEW].title = SANE_TITLE_PREVIEW; + s->opt[OPT_PREVIEW].desc = SANE_DESC_PREVIEW; + s->opt[OPT_PREVIEW].cap = SANE_CAP_SOFT_DETECT | SANE_CAP_SOFT_SELECT; + s->val[OPT_PREVIEW].w = 0; + + /* "Geometry" group: */ + s->opt[OPT_GEOMETRY_GROUP].name = "geometry-group"; + s->opt[OPT_GEOMETRY_GROUP].title = SANE_I18N("Geometry"); + 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); + + /* "Enhancement" group: */ + s->opt[OPT_ENHANCEMENT_GROUP].title = SANE_I18N("Enhancement"); + s->opt[OPT_ENHANCEMENT_GROUP].desc = ""; + s->opt[OPT_ENHANCEMENT_GROUP].type = SANE_TYPE_GROUP; + s->opt[OPT_ENHANCEMENT_GROUP].cap = 0; + s->opt[OPT_ENHANCEMENT_GROUP].constraint_type = SANE_CONSTRAINT_NONE; + + initGammaSettings( s ); + + /* grayscale gamma vector */ + s->opt[OPT_GAMMA_VECTOR].name = SANE_NAME_GAMMA_VECTOR; + s->opt[OPT_GAMMA_VECTOR].title = SANE_TITLE_GAMMA_VECTOR; + s->opt[OPT_GAMMA_VECTOR].desc = SANE_DESC_GAMMA_VECTOR; + s->opt[OPT_GAMMA_VECTOR].type = SANE_TYPE_INT; + s->opt[OPT_GAMMA_VECTOR].unit = SANE_UNIT_NONE; + s->opt[OPT_GAMMA_VECTOR].constraint_type = SANE_CONSTRAINT_RANGE; + s->val[OPT_GAMMA_VECTOR].wa = &(s->gamma_table[0][0]); + s->opt[OPT_GAMMA_VECTOR].constraint.range = &(s->gamma_range); + s->opt[OPT_GAMMA_VECTOR].size = s->gamma_length * sizeof(SANE_Word); + + /* red gamma vector */ + s->opt[OPT_GAMMA_VECTOR_R].name = SANE_NAME_GAMMA_VECTOR_R; + s->opt[OPT_GAMMA_VECTOR_R].title = SANE_TITLE_GAMMA_VECTOR_R; + s->opt[OPT_GAMMA_VECTOR_R].desc = SANE_DESC_GAMMA_VECTOR_R; + s->opt[OPT_GAMMA_VECTOR_R].type = SANE_TYPE_INT; + s->opt[OPT_GAMMA_VECTOR_R].unit = SANE_UNIT_NONE; + s->opt[OPT_GAMMA_VECTOR_R].constraint_type = SANE_CONSTRAINT_RANGE; + s->val[OPT_GAMMA_VECTOR_R].wa = &(s->gamma_table[1][0]); + s->opt[OPT_GAMMA_VECTOR_R].constraint.range = &(s->gamma_range); + s->opt[OPT_GAMMA_VECTOR_R].size = s->gamma_length * sizeof(SANE_Word); + + /* green gamma vector */ + s->opt[OPT_GAMMA_VECTOR_G].name = SANE_NAME_GAMMA_VECTOR_G; + s->opt[OPT_GAMMA_VECTOR_G].title = SANE_TITLE_GAMMA_VECTOR_G; + s->opt[OPT_GAMMA_VECTOR_G].desc = SANE_DESC_GAMMA_VECTOR_G; + s->opt[OPT_GAMMA_VECTOR_G].type = SANE_TYPE_INT; + s->opt[OPT_GAMMA_VECTOR_G].unit = SANE_UNIT_NONE; + s->opt[OPT_GAMMA_VECTOR_G].constraint_type = SANE_CONSTRAINT_RANGE; + s->val[OPT_GAMMA_VECTOR_G].wa = &(s->gamma_table[2][0]); + s->opt[OPT_GAMMA_VECTOR_G].constraint.range = &(s->gamma_range); + s->opt[OPT_GAMMA_VECTOR_G].size = s->gamma_length * sizeof(SANE_Word); + + /* blue gamma vector */ + s->opt[OPT_GAMMA_VECTOR_B].name = SANE_NAME_GAMMA_VECTOR_B; + s->opt[OPT_GAMMA_VECTOR_B].title = SANE_TITLE_GAMMA_VECTOR_B; + s->opt[OPT_GAMMA_VECTOR_B].desc = SANE_DESC_GAMMA_VECTOR_B; + s->opt[OPT_GAMMA_VECTOR_B].type = SANE_TYPE_INT; + s->opt[OPT_GAMMA_VECTOR_B].unit = SANE_UNIT_NONE; + s->opt[OPT_GAMMA_VECTOR_B].constraint_type = SANE_CONSTRAINT_RANGE; + s->val[OPT_GAMMA_VECTOR_B].wa = &(s->gamma_table[3][0]); + s->opt[OPT_GAMMA_VECTOR_B].constraint.range = &(s->gamma_range); + s->opt[OPT_GAMMA_VECTOR_B].size = s->gamma_length * sizeof(SANE_Word); + + /* GAMMA stuff is disabled per default */ + s->opt[OPT_GAMMA_VECTOR].cap |= SANE_CAP_INACTIVE; + s->opt[OPT_GAMMA_VECTOR_R].cap |= SANE_CAP_INACTIVE; + s->opt[OPT_GAMMA_VECTOR_G].cap |= SANE_CAP_INACTIVE; + s->opt[OPT_GAMMA_VECTOR_B].cap |= SANE_CAP_INACTIVE; + + /* disable extended mode list for devices without TPA */ + if( 0 == (s->hw->caps.dwFlag & SFLAG_TPA)) { + s->opt[OPT_EXT_MODE].cap |= SANE_CAP_INACTIVE; + } + + /* disable custom gamma, if not supported by the driver... */ + if( 0 == (s->hw->caps.dwFlag & SFLAG_CUSTOM_GAMMA)) { + s->opt[OPT_CUSTOM_GAMMA].cap |= SANE_CAP_INACTIVE; + } + + return SANE_STATUS_GOOD; +} + +#define _INT 0 +#define _FLOAT 1 + +/** function to decode an value and give it back to the caller. + * @param src - pointer to the source string to check + * @param opt - string that keeps the option name to check src for + * @param what - _FLOAT or _INT + * @param result - pointer to the var that should receive our result + * @param def - default value that result should be in case of any error + * @return The function returns SANE_TRUE if the option has been found, + * if not, it returns SANE_FALSE + */ +static SANE_Bool decodeVal( char *src, char *opt, + int what, void *result, void *def ) +{ + char *tmp, *tmp2; + const char *name; + + /* skip the option string */ + name = (const char*)&src[strlen("option")]; + + /* get the name of the option */ + name = sanei_config_get_string( name, &tmp ); + + if( tmp ) { + + /* on success, compare wiht the given one */ + if( 0 == strcmp( tmp, opt )) { + + DBG( _DBG_SANE_INIT, "Decoding option >%s<\n", opt ); + + if( _INT == what ) { + + /* assign the default value for this option... */ + *((int*)result) = *((int*)def); + + if( *name ) { + + /* get the configuration value and decode it */ + name = sanei_config_get_string( name, &tmp2 ); + + if( tmp2 ) { + *((int*)result) = strtol( tmp2, 0, 0 ); + free( tmp2 ); + } + } + free( tmp ); + return SANE_TRUE; + + } else if( _FLOAT == what ) { + + /* assign the default value for this option... */ + *((double*)result) = *((double*)def); + + if( *name ) { + + /* get the configuration value and decode it */ + name = sanei_config_get_string( name, &tmp2 ); + + if( tmp2 ) { + *((double*)result) = strtod( tmp2, 0 ); + free( tmp2 ); + } + } + free( tmp ); + return SANE_TRUE; + } + } + free( tmp ); + } + + return SANE_FALSE; +} + +/** function to retrive the device name of a given string + * @param src - string that keeps the option name to check src for + * @param dest - pointer to the string, that should receive the detected + * devicename + * @return The function returns SANE_TRUE if the devicename has been found, + * if not, it returns SANE_FALSE + */ +static SANE_Bool decodeDevName( char *src, char *dest ) +{ + char *tmp; + const char *name; + + if( 0 == strncmp( "device", src, 6 )) { + + name = (const char*)&src[strlen("device")]; + name = sanei_config_skip_whitespace( name ); + + DBG( _DBG_SANE_INIT, "Decoding device name >%s<\n", name ); + + if( *name ) { + name = sanei_config_get_string( name, &tmp ); + if( tmp ) { + + strcpy( dest, tmp ); + free( tmp ); + return SANE_TRUE; + } + } + } + + return SANE_FALSE; +} + +/** attach a device to the backend + */ +static SANE_Status attach( const char *dev_name, pCnfDef cnf, + Plustek_Device **devp ) +{ + int cntr; + int result; + int handle; + Plustek_Device *dev; + + DBG( _DBG_SANE_INIT, "attach (%s, %p, %p)\n", + dev_name, (void *)cnf, (void *)devp); + + /* already attached ?*/ + for( dev = first_dev; dev; dev = dev->next ) { + + if( 0 == strcmp( dev->sane.name, dev_name )) { + if( devp ) + *devp = dev; + + return SANE_STATUS_GOOD; + } + } + + /* allocate some memory for the device */ + dev = malloc( sizeof (*dev)); + if( NULL == dev ) + return SANE_STATUS_NO_MEM; + + /* assign all the stuff we need fo this device... */ + + memset(dev, 0, sizeof (*dev)); + + dev->fd = -1; + dev->name = strdup(dev_name); /* hold it double to avoid */ + dev->sane.name = dev->name; /* compiler warnings */ + dev->sane.vendor = "Plustek"; + dev->initialized = -1; /* will be used as index too */ + + memcpy( &dev->adj, &cnf->adj, sizeof(AdjDef)); + + show_cnf( cnf ); + + dev->sane.type = SANE_I18N ("flatbed scanner"); + dev->open = ppDev_open; + dev->close = ppDev_close; + dev->getCaps = ppDev_getCaps; + dev->getLensInfo = ppDev_getLensInfo; + dev->getCropInfo = ppDev_getCropInfo; + dev->putImgInfo = ppDev_putImgInfo; + dev->setScanEnv = ppDev_setScanEnv; + dev->startScan = ppDev_startScan; + dev->stopScan = ppDev_stopScan; + dev->setMap = ppDev_setMap; + dev->readImage = ppDev_readImage; + dev->shutdown = NULL; + dev->readLine = NULL; + dev->prepare = NULL; + + /* + * go ahead and open the scanner device + */ + handle = drvopen( dev ); + if( handle < 0 ) { + DBG( _DBG_ERROR,"open failed: %d\n", handle ); + return SANE_STATUS_IO_ERROR; + } + + /* okay, so assign the handle... */ + dev->fd = handle; + + result = dev->getCaps( dev ); + if( result < 0 ) { + DBG( _DBG_ERROR, "dev->getCaps() failed(%d)\n", result); + dev->close(dev); + return SANE_STATUS_IO_ERROR; + } + + result = dev->getLensInfo( dev, &lens ); + if( result < 0 ) { + DBG( _DBG_ERROR, "dev->getLensInfo() failed(%d)\n", result ); + dev->close(dev); + return SANE_STATUS_IO_ERROR; + } + + /* did we fail on connection? */ + if( _NO_BASE == dev->caps.wIOBase ) { + DBG( _DBG_ERROR, "failed to find Plustek scanner\n" ); + dev->close(dev); + return SANE_STATUS_INVAL; + } + + /* save the info we got from the driver */ + DBG( _DBG_INFO, "Scanner information:\n" ); + if( dev->caps.Model < MODEL_UNKNOWN ) { + dev->sane.model = ModelStr[dev->caps.Model]; + } else { + dev->sane.model = ModelStr[0]; + } + + DBG( _DBG_INFO, "Vendor : %s\n", dev->sane.vendor ); + DBG( _DBG_INFO, "Model : %s\n", dev->sane.model ); + DBG( _DBG_INFO, "Asic : 0x%02x\n", dev->caps.AsicID ); + DBG( _DBG_INFO, "Flags : 0x%08lx\n", dev->caps.dwFlag ); + + dev->max_x = dev->caps.wMaxExtentX*MM_PER_INCH/_MEASURE_BASE; + dev->max_y = dev->caps.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" ); + dev->close(dev); + return SANE_STATUS_INVAL; + } + + /* build up the resolution table */ + 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; + } + + limitResolution( dev ); + + dev->fd = handle; + drvclose( dev ); + + 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; +} + +/** function to preset a configuration structure + * @param cnf - pointer to the structure that should be initialized + */ +static void init_config_struct( pCnfDef cnf, SANE_Bool direct_io ) +{ + memset( cnf, 0, sizeof(CnfDef)); + + cnf->adj.direct_io = direct_io; + + cnf->adj.warmup = -1; + cnf->adj.lampOff = -1; + cnf->adj.lampOffOnEnd = -1; + + cnf->adj.graygamma = 1.0; + cnf->adj.rgamma = 1.0; + cnf->adj.ggamma = 1.0; + cnf->adj.bgamma = 1.0; +} + +/** intialize the backend + */ +SANE_Status sane_init( SANE_Int *version_code, SANE_Auth_Callback authorize ) +{ + char str[PATH_MAX] = _DEFAULT_DEVICE; + CnfDef config; + size_t len; + FILE *fp; + SANE_Status res; + + DBG_INIT(); + sanei_thread_init(); + + res = sanei_pp_init(); + if( SANE_STATUS_GOOD != res ) { + DBG( _DBG_ERROR, "Could not initialize Parport library!\n" ); + return res; + } + +#if defined PACKAGE && defined VERSION + DBG( _DBG_SANE_INIT, "PlustekPP backend V"BACKEND_VERSION", part of " + PACKAGE " " VERSION "\n"); +#else + DBG( _DBG_INFO, "PlustekPP backend V"BACKEND_VERSION"\n" ); +#endif + + /* do some presettings... */ + auth = authorize; + first_dev = NULL; + first_handle = NULL; + num_devices = 0; + + /* initialize the configuration structure */ +#ifdef _BACKEND_ENABLED + init_config_struct( &config, SANE_TRUE ); +#else + init_config_struct( &config, SANE_FALSE ); +#endif + + if( version_code != NULL ) + *version_code = SANE_VERSION_CODE(SANE_CURRENT_MAJOR, V_MINOR, 0); + + fp = sanei_config_open( PLUSTEK_CONFIG_FILE ); + + /* default to _DEFAULT_DEVICE instead of insisting on config file */ + if( NULL == fp ) { + return attach( _DEFAULT_DEVICE, &config, 0 ); + } + + while( sanei_config_read( str, sizeof(str), fp)) { + + DBG( _DBG_SANE_INIT, ">%s<\n", str ); + if( str[0] == '#') /* ignore line comments */ + continue; + + len = strlen(str); + if( 0 == len ) + continue; /* ignore empty lines */ + + /* check for options */ + if( 0 == strncmp(str, "option", 6)) { + + int ival; + + ival = -1; + decodeVal( str, "warmup", _INT, &config.adj.warmup, &ival); + decodeVal( str, "lampOff", _INT, &config.adj.lampOff, &ival); + decodeVal( str, "lOffOnEnd", _INT, &config.adj.lampOffOnEnd,&ival); + + ival = 0; + decodeVal( str, "mov", _INT, &config.adj.mov, &ival ); + continue; + + /* check for sections: */ + } else if( 0 == strncmp( str, "[direct]", 8)) { + + /* new section, try and attach previous device */ + if( config.devName[0] != '\0' ) + attach( config.devName, &config, 0 ); + + /* re-initialize the configuration structure */ + init_config_struct( &config, SANE_TRUE ); + continue; + + } else if( 0 == strncmp( str, "[kernel]", 8 )) { + + /* new section, try and attach previous device */ + if( config.devName[0] != '\0' ) + attach( config.devName, &config, 0 ); + + /* re-initialize the configuration structure */ + init_config_struct( &config, SANE_FALSE ); + continue; + + } else if( SANE_TRUE == decodeDevName( str, config.devName )) { + continue; + } + + /* ignore other stuff... */ + DBG( _DBG_SANE_INIT, "ignoring >%s<\n", str ); + } + fclose (fp); + + /* try to attach the last device in the config file... */ + if( config.devName[0] != '\0' ) + attach( config.devName, &config, 0 ); + + 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; ) { + + next = dev->next; + + /* call the shutdown function of each device... */ + if( dev->shutdown ) + dev->shutdown( dev ); + + /* + * we're doin' this to avoid compiler warnings as dev->sane.name + * is defined as const char* + */ + if( dev->sane.name ) + free( dev->name ); + + if( dev->res_list ) + free( dev->res_list ); + free( dev ); + + dev = next; + } + + if( devlist ) + free( devlist ); + + /* call driver specific shutdown function... */ + PtDrvShutdown(); + + devlist = NULL; + 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 ) +{ + int i; + Plustek_Device *dev; + + 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; + CnfDef config; + + DBG( _DBG_SANE_INIT, "sane_open - %s\n", devicename ); + + if( devicename[0] ) { + for( dev = first_dev; dev; dev = dev->next ) { + if( strcmp( dev->sane.name, devicename ) == 0 ) + break; + } + + if( !dev ) { + + memset( &config, 0, sizeof(CnfDef)); + + /* check if a valid parport-device is meant... */ + status = attach( devicename, &config, &dev ); + if( SANE_STATUS_GOOD != status ) + return status; + } + } else { + /* empty devicename -> use first device */ + dev = first_dev; + } + + if( !dev ) + return SANE_STATUS_INVAL; + + s = malloc (sizeof (*s)); + if( NULL == s ) + return SANE_STATUS_NO_MEM; + + memset(s, 0, sizeof (*s)); + s->r_pipe = -1; + s->w_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 ); + + if (prev) + prev->next = s->next; + else + first_handle = s->next; + + free(s); +} + +/** goes through a string list and returns the start-address of the string + * that has been found, or NULL on error + */ +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; + pModeParam mp; + int scanmode; + + if ( s->scanning ) + return SANE_STATUS_DEVICE_BUSY; + + if((option < 0) || (option >= NUM_OPTIONS)) + return SANE_STATUS_INVAL; + + if( NULL != info ) + *info = 0; + + switch( action ) { + + case SANE_ACTION_GET_VALUE: + switch (option) { + case OPT_PREVIEW: + case OPT_NUM_OPTS: + case OPT_RESOLUTION: + case OPT_TL_X: + case OPT_TL_Y: + case OPT_BR_X: + case OPT_BR_Y: + case OPT_CUSTOM_GAMMA: + *(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: + strcpy ((char *) value, + s->opt[option].constraint.string_list[s->val[option].w]); + break; + + /* word array options: */ + case OPT_GAMMA_VECTOR: + case OPT_GAMMA_VECTOR_R: + case OPT_GAMMA_VECTOR_G: + case OPT_GAMMA_VECTOR_B: + memcpy( value, s->val[option].wa, s->opt[option].size ); + break; + + default: + return SANE_STATUS_INVAL; + } + break; + + case SANE_ACTION_SET_VALUE: + status = sanei_constrain_value( s->opt + option, value, info ); + if( SANE_STATUS_GOOD != status ) + return status; + + optval = NULL; + if( SANE_CONSTRAINT_STRING_LIST == s->opt[option].constraint_type ) { + + optval = search_string_list( s->opt[option].constraint.string_list, + (char *) value); + if( NULL == optval ) + 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( v != best ) + *(SANE_Word *)value = best; + + if( NULL != info ) { + if( v != best ) + *info |= SANE_INFO_INEXACT; + *info |= SANE_INFO_RELOAD_PARAMS; + } + break; + + } + + case OPT_PREVIEW: + case OPT_TL_X: + case OPT_TL_Y: + case OPT_BR_X: + case OPT_BR_Y: + s->val[option].w = *(SANE_Word *)value; + if( NULL != info ) + *info |= SANE_INFO_RELOAD_PARAMS; + break; + + case OPT_CUSTOM_GAMMA: + s->val[option].w = *(SANE_Word *)value; + if( NULL != info ) + *info |= SANE_INFO_RELOAD_PARAMS | SANE_INFO_RELOAD_OPTIONS; + + mp = getModeList( s ); + scanmode = mp[s->val[OPT_MODE].w].scanmode; + + s->opt[OPT_GAMMA_VECTOR].cap |= SANE_CAP_INACTIVE; + s->opt[OPT_GAMMA_VECTOR_R].cap |= SANE_CAP_INACTIVE; + s->opt[OPT_GAMMA_VECTOR_G].cap |= SANE_CAP_INACTIVE; + s->opt[OPT_GAMMA_VECTOR_B].cap |= SANE_CAP_INACTIVE; + + if( SANE_TRUE == s->val[option].w ) { + + if((scanmode == COLOR_256GRAY) || + (scanmode == COLOR_GRAY16)) { + s->opt[OPT_GAMMA_VECTOR].cap &= ~SANE_CAP_INACTIVE; + } else { + s->opt[OPT_GAMMA_VECTOR_R].cap &= ~SANE_CAP_INACTIVE; + s->opt[OPT_GAMMA_VECTOR_G].cap &= ~SANE_CAP_INACTIVE; + s->opt[OPT_GAMMA_VECTOR_B].cap &= ~SANE_CAP_INACTIVE; + } + + } else { + + initGammaSettings( s ); + + if((scanmode == COLOR_256GRAY) || + (scanmode == COLOR_GRAY16)) { + s->opt[OPT_GAMMA_VECTOR].cap |= SANE_CAP_INACTIVE; + } else { + s->opt[OPT_GAMMA_VECTOR_R].cap |= SANE_CAP_INACTIVE; + s->opt[OPT_GAMMA_VECTOR_G].cap |= SANE_CAP_INACTIVE; + s->opt[OPT_GAMMA_VECTOR_B].cap |= SANE_CAP_INACTIVE; + } + } + break; + + case OPT_CONTRAST: + case OPT_BRIGHTNESS: + s->val[option].w = + ((*(SANE_Word *)value) >> SANE_FIXED_SCALE_SHIFT); + break; + + case OPT_MODE: { + + int idx = (optval - mode_list); + + if((_ASIC_IS_98001 == s->hw->caps.AsicID) || + (_ASIC_IS_98003 == s->hw->caps.AsicID)) { + idx = optval - mode_9800x_list; + } + + mp = getModeList( s ); + + if( mp[idx].scanmode != COLOR_HALFTONE ){ + s->opt[OPT_HALFTONE].cap |= SANE_CAP_INACTIVE; + s->opt[OPT_CONTRAST].cap &= ~SANE_CAP_INACTIVE; + s->opt[OPT_CUSTOM_GAMMA].cap &= ~SANE_CAP_INACTIVE; + } else { + s->opt[OPT_HALFTONE].cap &= ~SANE_CAP_INACTIVE; + s->opt[OPT_CONTRAST].cap |= SANE_CAP_INACTIVE; + s->opt[OPT_CUSTOM_GAMMA].cap |= SANE_CAP_INACTIVE; + } + + if( mp[idx].scanmode == COLOR_BW ) { + s->opt[OPT_CONTRAST].cap |= SANE_CAP_INACTIVE; + s->opt[OPT_CUSTOM_GAMMA].cap |= SANE_CAP_INACTIVE; + } + + s->opt[OPT_GAMMA_VECTOR].cap |= SANE_CAP_INACTIVE; + s->opt[OPT_GAMMA_VECTOR_R].cap |= SANE_CAP_INACTIVE; + s->opt[OPT_GAMMA_VECTOR_G].cap |= SANE_CAP_INACTIVE; + s->opt[OPT_GAMMA_VECTOR_B].cap |= SANE_CAP_INACTIVE; + + if( s->val[OPT_CUSTOM_GAMMA].w && + !(s->opt[OPT_CUSTOM_GAMMA].cap & SANE_CAP_INACTIVE)) { + + if((mp[idx].scanmode == COLOR_256GRAY) || + (mp[idx].scanmode == COLOR_GRAY16)) { + s->opt[OPT_GAMMA_VECTOR].cap &= ~SANE_CAP_INACTIVE; + } else { + s->opt[OPT_GAMMA_VECTOR_R].cap &= ~SANE_CAP_INACTIVE; + s->opt[OPT_GAMMA_VECTOR_G].cap &= ~SANE_CAP_INACTIVE; + s->opt[OPT_GAMMA_VECTOR_B].cap &= ~SANE_CAP_INACTIVE; + } + } + + if( NULL != info ) + *info |= SANE_INFO_RELOAD_OPTIONS | SANE_INFO_RELOAD_PARAMS; + } + + /* fall through to OPT_HALFTONE */ + case OPT_HALFTONE: + 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(s->hw->max_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); + s->val[OPT_MODE].w = 3; /* COLOR_TRUE24 */ + + if((_ASIC_IS_98001 == s->hw->caps.AsicID) || + (_ASIC_IS_98003 == s->hw->caps.AsicID)) { + s->opt[OPT_MODE].constraint.string_list = mode_9800x_list; + } else { + s->opt[OPT_MODE].constraint.string_list = mode_list; + } + + } 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( s->hw->caps.dwFlag & SFLAG_TPA ) { + + s->opt[OPT_MODE].constraint.string_list = + &mode_9800x_list[_TPAModeSupportMin]; + } else { + s->opt[OPT_MODE].constraint.string_list = + &mode_list[_TPAModeSupportMin]; + } + s->val[OPT_MODE].w = 0; /* COLOR_24 is the default */ + } + + s->opt[OPT_HALFTONE].cap |= SANE_CAP_INACTIVE; + s->opt[OPT_CONTRAST].cap &= ~SANE_CAP_INACTIVE; + + if( NULL != info ) + *info |= SANE_INFO_RELOAD_OPTIONS | SANE_INFO_RELOAD_PARAMS; + break; + } + case OPT_GAMMA_VECTOR: + case OPT_GAMMA_VECTOR_R: + case OPT_GAMMA_VECTOR_G: + case OPT_GAMMA_VECTOR_B: + memcpy( s->val[option].wa, value, s->opt[option].size ); + checkGammaSettings(s); + if( NULL != info ) + *info |= SANE_INFO_RELOAD_PARAMS; + break; + + default: + return SANE_STATUS_INVAL; + } + break; + + + default: + return SANE_STATUS_INVAL; + } + + return SANE_STATUS_GOOD; +} + +/** according to the option number, return a pointer to a descriptor + */ +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]); +} + +/** 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 + * do the same, if sane_get_parameters() is called + * by a frontend before sane_start() is called + */ + if((NULL == params) || (s->scanning != SANE_TRUE)) { + + 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; + } + + /* if sane_get_parameters() was called before sane_start() */ + /* pass new values to the caller */ + if ((NULL != params) && (s->scanning != SANE_TRUE)) + *params = s->params; + } 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]; + StartScan start; + CropInfo crop; + ScanInfo sinfo; + SANE_Status status; + SANE_Word tmp; + + 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 ); + 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 = s->hw->getCaps( s->hw ); + if( result < 0 ) { + DBG( _DBG_ERROR, "dev->getCaps() failed(%d)\n", result); + s->hw->close( s->hw ); + return SANE_STATUS_IO_ERROR; + } + + result = s->hw->getLensInfo( s->hw, &lens ); + if( result < 0 ) { + DBG( _DBG_ERROR, "dev->getLensInfo() failed(%d)\n", result ); + s->hw->close( s->hw ); + return SANE_STATUS_IO_ERROR; + } + + /* did we fail on connection? */ + if ( s->hw->caps.wIOBase == _NO_BASE ) { + DBG( _DBG_ERROR, "failed to find Plustek scanner\n" ); + s->hw->close( s->hw ); + return SANE_STATUS_INVAL; + } + + /* All ready to go. Set image def and see what the scanner + * says for crop info. + */ + ndpi = s->val[OPT_RESOLUTION].w; + + /* exchange the values as we can't deal with negative heights and so on...*/ + tmp = s->val[OPT_TL_X].w; + if( tmp > s->val[OPT_BR_X].w ) { + DBG( _DBG_INFO, "exchanging BR-X - TL-X\n" ); + s->val[OPT_TL_X].w = s->val[OPT_BR_X].w; + s->val[OPT_BR_X].w = tmp; + } + + tmp = s->val[OPT_TL_Y].w; + if( tmp > s->val[OPT_BR_Y].w ) { + DBG( _DBG_INFO, "exchanging BR-Y - TL-Y\n" ); + s->val[OPT_TL_Y].w = s->val[OPT_BR_Y].w; + s->val[OPT_BR_Y].w = tmp; + } + + /* 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; + DBG( _DBG_INFO, "scanmode = %u\n", scanmode ); + + /* clear it out just in case */ + memset (&sinfo, 0, sizeof(sinfo)); + sinfo.ImgDef.xyDpi.x = ndpi; + sinfo.ImgDef.xyDpi.y = ndpi; + sinfo.ImgDef.crArea.x = left; /* offset from left edge to area you want to scan */ + sinfo.ImgDef.crArea.y = top; /* offset from top edge to area you want to scan */ + sinfo.ImgDef.crArea.cx = width; /* always relative to 300 dpi */ + sinfo.ImgDef.crArea.cy = height; + sinfo.ImgDef.wDataType = scanmode; + +/* + * CHECK: what about the 10 bit mode? + */ +#if 0 + if( COLOR_TRUE48 == scanmode ) + sinfo.ImgDef.wBits = OUTPUT_12Bits; + else if( COLOR_TRUE32 == scanmode ) + sinfo.ImgDef.wBits = OUTPUT_10Bits; + else + sinfo.ImgDef.wBits = OUTPUT_8Bits; +#endif + sinfo.ImgDef.dwFlag = SCANDEF_QualityScan; + + switch( s->val[OPT_EXT_MODE].w ) { + case 1: sinfo.ImgDef.dwFlag |= SCANDEF_Transparency; break; + case 2: sinfo.ImgDef.dwFlag |= SCANDEF_Negative; break; + default: break; + } + + /* only for parallel-port devices */ + if( s->hw->putImgInfo ) { + result = s->hw->putImgInfo( s->hw, &sinfo.ImgDef ); + if( result < 0 ) { + DBG( _DBG_ERROR, "dev->putImgInfo failed(%d)\n", result ); + s->hw->close( s->hw ); + return SANE_STATUS_IO_ERROR; + } + } else { + + memcpy( &(crop.ImgDef), &sinfo.ImgDef, sizeof(ImgDef)); + + } + + result = s->hw->getCropInfo( s->hw, &crop ); + if( result < 0 ) { + DBG( _DBG_ERROR, "dev->getCropInfo() failed(%d)\n", result ); + s->hw->close( s->hw ); + return SANE_STATUS_IO_ERROR; + } + + /* DataInf.dwAppPixelsPerLine = crop.dwPixelsPerLine; */ + s->params.pixels_per_line = crop.dwPixelsPerLine; + s->params.bytes_per_line = crop.dwBytesPerLine; + s->params.lines = crop.dwLinesPerArea; + + /* build a SCANINFO block and get ready to scan it */ + sinfo.ImgDef.dwFlag |= (SCANDEF_BuildBwMap | SCANDEF_QualityScan); + + /* set adjustments for brightness and contrast */ + sinfo.siBrightness = s->val[OPT_BRIGHTNESS].w; + sinfo.siContrast = s->val[OPT_CONTRAST].w; + sinfo.wDither = s->val[OPT_HALFTONE].w; + + DBG( _DBG_SANE_INIT, "bright %i contrast %i\n", sinfo.siBrightness, + sinfo.siContrast); + + result = s->hw->setScanEnv( s->hw, &sinfo ); + if( result < 0 ) { + DBG( _DBG_ERROR, "dev->setEnv() failed(%d)\n", result ); + s->hw->close( s->hw ); + return SANE_STATUS_IO_ERROR; + } + + /* download gamma correction tables... */ + if( scanmode <= COLOR_256GRAY || scanmode == COLOR_GRAY16 ) { + s->hw->setMap( s->hw, s->gamma_table[0], s->gamma_length, _MAP_MASTER); + } else { + s->hw->setMap( s->hw, s->gamma_table[1], s->gamma_length, _MAP_RED ); + s->hw->setMap( s->hw, s->gamma_table[2], s->gamma_length, _MAP_GREEN ); + s->hw->setMap( s->hw, s->gamma_table[3], s->gamma_length, _MAP_BLUE ); + } + /* work-around for USB... */ + start.dwLinesPerScan = s->params.lines; + + result = s->hw->startScan( s->hw, &start ); + if( result < 0 ) { + DBG( _DBG_ERROR, "dev->startScan() failed(%d)\n", result ); + s->hw->close( s->hw ); + 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" ); + s->hw->close( s->hw ); + 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; + s->hw->close( s->hw ); + return SANE_STATUS_IO_ERROR; + } + + /* create reader routine as new process */ + s->bytes_read = 0; + s->r_pipe = fds[0]; + s->w_pipe = fds[1]; + s->reader_pid = sanei_thread_begin( reader_process, s ); + + if( s->reader_pid == -1 ) { + DBG( _DBG_ERROR, "ERROR: could not create child process\n" ); + s->scanning = SANE_FALSE; + s->hw->close( s->hw ); + return SANE_STATUS_IO_ERROR; + } + + /* reader_pid = 0 ===> child process */ +#if 0 + 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 ); + } +#endif + signal( SIGCHLD, sig_chldhandler ); + + if( sanei_thread_is_forked()) { + close( s->w_pipe ); + s->w_pipe = -1; + } + + 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; + + /* here we read all data from the driver... */ + nread = read( s->r_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( EAGAIN == errno ) { + + /* if we had already red the picture, so it's okay and stop */ + if( s->bytes_read == + (unsigned long)(s->params.lines * s->params.bytes_per_line)) { + sanei_thread_waitpid( s->reader_pid, 0 ); + s->reader_pid = -1; + drvclose( s->hw ); + return close_pipe(s); + } + + /* else force the frontend to try again*/ + 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; + + /* nothing red means that we're finished OR we had a problem...*/ + if( 0 == nread ) { + + drvclose( s->hw ); + s->exit_code = sanei_thread_get_status( s->reader_pid ); + + if( SANE_STATUS_GOOD != s->exit_code ) { + close_pipe(s); + return s->exit_code; + } + s->reader_pid = -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( -1 == s->r_pipe ) { + DBG( _DBG_ERROR, "ERROR: not supported !\n" ); + return SANE_STATUS_UNSUPPORTED; + } + + if( fcntl (s->r_pipe, F_SETFL, non_blocking ? O_NONBLOCK : 0) < 0) { + DBG( _DBG_ERROR, "ERROR: canīt 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->r_pipe; + + DBG( _DBG_SANE_INIT, "sane_get_select_fd done\n" ); + return SANE_STATUS_GOOD; +} + +/* END PLUSTEK_PP.C .........................................................*/ |