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sane-project-backends/backend/hp-handle.c

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16 KiB
C
Czysty Wina Historia

/* sane - Scanner Access Now Easy.
Copyright (C) 1997 Geoffrey T. Dairiki
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.
This file is part of a SANE backend for HP Scanners supporting
HP Scanner Control Language (SCL).
*/
/* #define STUBS
extern int sanei_debug_hp; */
#define DEBUG_DECLARE_ONLY
#include "sane/config.h"
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <string.h>
#include <signal.h>
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/wait.h>
#include "hp.h"
#include "sane/sanei_backend.h"
#include "hp-device.h"
#include "hp-option.h"
#include "hp-accessor.h"
#include "hp-scsi.h"
#include "hp-scl.h"
struct hp_handle_s
{
HpData data;
HpDevice dev;
SANE_Parameters scan_params;
pid_t reader_pid;
size_t bytes_left;
int pipefd;
sig_atomic_t cancelled;
};
static hp_bool_t
hp_handle_isScanning (HpHandle this)
{
return this->reader_pid != 0;
}
static SANE_Status
hp_handle_startReader (HpHandle this, HpScsi scsi, HpProcessData *procdata)
{
int fds[2];
sigset_t sig_set, old_set;
struct SIGACTION sa;
SANE_Status status;
assert(this->reader_pid == 0);
this->cancelled = 0;
if (pipe(fds))
return SANE_STATUS_IO_ERROR;
sigfillset(&sig_set);
sigprocmask(SIG_BLOCK, &sig_set, &old_set);
if ((this->reader_pid = fork()) != 0)
{
sigprocmask(SIG_SETMASK, &old_set, 0);
close(fds[1]);
if (this->reader_pid == -1)
{
close(fds[0]);
return SANE_STATUS_IO_ERROR;
}
this->pipefd = fds[0];
DBG(1, "start_reader: reader process %d started\n", this->reader_pid);
return SANE_STATUS_GOOD;
}
close(fds[0]);
memset(&sa, 0, sizeof(sa));
sa.sa_handler = SIG_DFL;
sigaction(SIGTERM, &sa, 0);
sigdelset(&sig_set, SIGTERM);
sigprocmask(SIG_SETMASK, &sig_set, 0);
/* not closing fds[1] gives an infinite loop on Digital UNIX */
status = sanei_hp_scsi_pipeout(scsi,fds[1],procdata);
close (fds[1]);
DBG(3,"hp_handle_startReader: Exiting child (%s)\n",sane_strstatus(status));
_exit(status);
}
static SANE_Status
hp_handle_stopScan (HpHandle this)
{
HpScsi scsi;
this->cancelled = 0;
this->bytes_left = 0;
if (this->reader_pid)
{
int info;
DBG(3, "hp_handle_stopScan: killing child (%d)\n", this->reader_pid);
kill(this->reader_pid, SIGTERM);
waitpid(this->reader_pid, &info, 0);
DBG(1, "hp_handle_stopScan: child %s = %d\n",
WIFEXITED(info) ? "exited, status" : "signalled, signal",
WIFEXITED(info) ? WEXITSTATUS(info) : WTERMSIG(info));
close(this->pipefd);
this->reader_pid = 0;
if (WIFSIGNALED(info)
&& !FAILED( sanei_hp_scsi_new(&scsi, this->dev->sanedev.name) ))
{
/*
sanei_hp_scl_set(scsi, SCL_CLEAR_ERRORS, 0);
sanei_hp_scl_errcheck(scsi);
*/
sanei_hp_scl_reset(scsi);
sanei_hp_scsi_destroy(scsi,0);
}
}
else
{
DBG(3, "hp_handle_stopScan: no pid for child\n");
}
return SANE_STATUS_GOOD;
}
static SANE_Status
hp_handle_uploadParameters (HpHandle this, HpScsi scsi, int *scan_depth,
hp_bool_t *soft_invert, hp_bool_t *out8)
{
SANE_Parameters * p = &this->scan_params;
int data_width;
enum hp_device_compat_e compat;
assert(scsi);
*soft_invert = 0;
*out8 = 0;
p->last_frame = SANE_TRUE;
/* inquire resulting size of image after setting it up */
RETURN_IF_FAIL( sanei_hp_scl_inquire(scsi, SCL_PIXELS_PER_LINE,
&p->pixels_per_line,0,0) );
RETURN_IF_FAIL( sanei_hp_scl_inquire(scsi, SCL_BYTES_PER_LINE,
&p->bytes_per_line,0,0) );
RETURN_IF_FAIL( sanei_hp_scl_inquire(scsi, SCL_NUMBER_OF_LINES,
&p->lines,0,0));
RETURN_IF_FAIL( sanei_hp_scl_inquire(scsi, SCL_DATA_WIDTH,
&data_width,0,0));
switch (sanei_hp_optset_scanmode(this->dev->options, this->data)) {
case HP_SCANMODE_LINEART: /* Lineart */
case HP_SCANMODE_HALFTONE: /* Halftone */
p->format = SANE_FRAME_GRAY;
p->depth = 1;
*scan_depth = 1;
/* The OfficeJets don't seem to handle SCL_INVERSE_IMAGE, so we'll
* have to invert in software. */
if ((sanei_hp_device_probe (&compat, scsi) == SANE_STATUS_GOOD)
&& (compat & HP_COMPAT_OJ_1150C)) {
*soft_invert=1;
}
break;
case HP_SCANMODE_GRAYSCALE: /* Grayscale */
p->format = SANE_FRAME_GRAY;
p->depth = (data_width > 8) ? 16 : 8;
*scan_depth = data_width;
/* 8 bit output forced ? */
if ( *scan_depth > 8 )
{
*out8 = sanei_hp_optset_output_8bit (this->dev->options, this->data);
DBG(1,"hp_handle_uploadParameters: out8=%d\n", (int)*out8);
if (*out8)
{
p->depth = 8;
p->bytes_per_line /= 2;
}
}
break;
case HP_SCANMODE_COLOR: /* RGB */
p->format = SANE_FRAME_RGB;
p->depth = (data_width > 24) ? 16 : 8;
*scan_depth = data_width / 3;
/* 8 bit output forced ? */
if ( *scan_depth > 8 )
{
*out8 = sanei_hp_optset_output_8bit (this->dev->options, this->data);
DBG(1,"hp_handle_uploadParameters: out8=%d\n", (int)*out8);
if (*out8)
{
p->depth = 8;
p->bytes_per_line /= 2;
}
}
/* HP PhotoSmart does not invert when depth > 8. Lets do it by software */
if ( (*scan_depth > 8)
&& (sanei_hp_device_probe (&compat, scsi) == SANE_STATUS_GOOD)
&& (compat & HP_COMPAT_PS) )
*soft_invert = 1;
DBG(1, "hp_handle_uploadParameters: data width %d\n", data_width);
break;
default:
assert(!"Aack");
return SANE_STATUS_INVAL;
}
return SANE_STATUS_GOOD;
}
HpHandle
sanei_hp_handle_new (HpDevice dev)
{
HpHandle new = sanei_hp_allocz(sizeof(*new));
if (!new)
return 0;
if (!(new->data = sanei_hp_data_dup(dev->data)))
{
sanei_hp_free(new);
return 0;
}
new->dev = dev;
return new;
}
void
sanei_hp_handle_destroy (HpHandle this)
{
HpScsi scsi=0;
DBG(3,"sanei_hp_handle_destroy: stop scan\n");
hp_handle_stopScan(this);
if (sanei_hp_scsi_new(&scsi,this->dev->sanedev.name)==SANE_STATUS_GOOD &&
scsi) {
sanei_hp_scsi_destroy(scsi,1);
}
sanei_hp_data_destroy(this->data);
sanei_hp_free(this);
}
const SANE_Option_Descriptor *
sanei_hp_handle_saneoption (HpHandle this, SANE_Int optnum)
{
if (this->cancelled)
{
DBG(1, "sanei_hp_handle_saneoption: cancelled. Stop scan\n");
hp_handle_stopScan(this);
}
return sanei_hp_optset_saneoption(this->dev->options, this->data, optnum);
}
SANE_Status
sanei_hp_handle_control(HpHandle this, SANE_Int optnum,
SANE_Action action, void *valp, SANE_Int *info)
{
SANE_Status status;
HpScsi scsi;
hp_bool_t immediate;
if (this->cancelled)
{
DBG(1, "sanei_hp_handle_control: cancelled. Stop scan\n");
RETURN_IF_FAIL( hp_handle_stopScan(this) );
}
if (hp_handle_isScanning(this))
return SANE_STATUS_DEVICE_BUSY;
RETURN_IF_FAIL( sanei_hp_scsi_new(&scsi, this->dev->sanedev.name) );
immediate = sanei_hp_optset_isImmediate(this->dev->options, optnum);
status = sanei_hp_optset_control(this->dev->options, this->data,
optnum, action, valp, info, scsi,
immediate);
sanei_hp_scsi_destroy ( scsi,0 );
return status;
}
SANE_Status
sanei_hp_handle_getParameters (HpHandle this, SANE_Parameters *params)
{
SANE_Status status;
if (!params)
return SANE_STATUS_GOOD;
if (this->cancelled)
{
DBG(1, "sanei_hp_handle_getParameters: cancelled. Stop scan\n");
RETURN_IF_FAIL( hp_handle_stopScan(this) );
}
if (hp_handle_isScanning(this))
{
*params = this->scan_params;
return SANE_STATUS_GOOD;
}
status = sanei_hp_optset_guessParameters(this->dev->options,
this->data, params);
#ifdef INQUIRE_AFTER_SCAN
/* Photosmart: this gives the correct number of lines when doing
an update of the SANE parameters right after a preview */
if (!strcmp("C5100A", this->dev->sanedev.model)) {
HpScsi scsi;
SANE_Parameters * p = &this->scan_params;
if (!FAILED( sanei_hp_scsi_new(&scsi, this->dev->sanedev.name) )) {
RETURN_IF_FAIL( sanei_hp_scl_inquire(scsi, SCL_NUMBER_OF_LINES,
&p->lines,0,0));
sanei_hp_scsi_destroy(scsi,0);
*params = this->scan_params;
}
}
#endif
return status;
}
SANE_Status
sanei_hp_handle_startScan (HpHandle this)
{
SANE_Status status;
HpScsi scsi;
HpScl scl;
HpProcessData procdata;
int adfscan;
/* FIXME: setup preview mode stuff? */
if (hp_handle_isScanning(this))
{
DBG(3,"sanei_hp_handle_startScan: Stop current scan\n");
RETURN_IF_FAIL( hp_handle_stopScan(this) );
}
RETURN_IF_FAIL( sanei_hp_scsi_new(&scsi, this->dev->sanedev.name) );
status = sanei_hp_optset_download(this->dev->options, this->data, scsi);
if (!FAILED(status))
status = hp_handle_uploadParameters(this, scsi,
&(procdata.bits_per_channel),
&(procdata.invert),
&(procdata.out8));
if (FAILED(status))
{
sanei_hp_scsi_destroy(scsi,0);
return status;
}
procdata.mirror_vertical =
sanei_hp_optset_mirror_vert (this->dev->options, this->data, scsi);
DBG(1, "start: %s to mirror image vertically\n", procdata.mirror_vertical ?
"Request" : "No request" );
scl = sanei_hp_optset_scan_type (this->dev->options, this->data);
adfscan = (scl == SCL_ADF_SCAN);
/* For ADF scan we should check if there is paper available */
if ( adfscan )
{int adfstat = 0;
int minval, maxval;
/* HP ScanJet IIp does not support commands ADF scan window */
/* and unload document. We have to use the usual scan window. */
if ( sanei_hp_device_support_get (this->dev->sanedev.name,
SCL_UNLOAD, &minval, &maxval)
!= SANE_STATUS_GOOD )
{
DBG(1, "start: Request for ADF scan without support of unload doc.\n");
DBG(1, " Seems to be a IIp. Use standard scan window command.\n");
scl = SCL_START_SCAN;
}
/* Check if the ADF is ready */
if ( sanei_hp_scl_inquire(scsi, SCL_ADF_READY, &adfstat, 0, 0)
!= SANE_STATUS_GOOD )
{
DBG(1, "start: Error checking if ADF is ready\n");
sanei_hp_scsi_destroy(scsi,0);
return SANE_STATUS_UNSUPPORTED;
}
if ( adfstat != 1 )
{
DBG(1, "start: ADF scan requested without paper. Finished.\n");
sanei_hp_scsi_destroy(scsi,0);
return SANE_STATUS_NO_DOCS;
}
}
DBG(1, "start: %s to mirror image vertically\n", procdata.mirror_vertical ?
"Request" : "No request" );
this->bytes_left = ( this->scan_params.bytes_per_line
* this->scan_params.lines );
DBG(1, "start: %d pixels per line, %d bytes per line, %d lines high\n",
this->scan_params.pixels_per_line, this->scan_params.bytes_per_line,
this->scan_params.lines);
procdata.bytes_per_line = (int)this->scan_params.bytes_per_line;
if (procdata.out8)
{
procdata.bytes_per_line *= 2;
DBG(1,"(scanner will send %d bytes per line, 8 bit output forced)\n",
procdata.bytes_per_line);
}
procdata.lines = this->scan_params.lines;
/* Wait for front-panel button push ? */
status = sanei_hp_optset_start_wait(this->dev->options, this->data, scsi);
if (status) /* Wait for front button push ? Start scan in reader process */
{
procdata.startscan = scl;
status = SANE_STATUS_GOOD;
}
else
{
procdata.startscan = 0;
status = sanei_hp_scl_startScan(scsi, scl);
}
if (!FAILED( status ))
{
status = hp_handle_startReader(this, scsi, &procdata);
}
sanei_hp_scsi_destroy(scsi,0);
return status;
}
SANE_Status
sanei_hp_handle_read (HpHandle this, void * buf, size_t *lengthp)
{
ssize_t nread;
SANE_Status status;
DBG(3, "sanei_hp_handle_read: trying to read %lu bytes\n",
(unsigned long) *lengthp);
if (!hp_handle_isScanning(this))
{
DBG(1, "sanei_hp_handle_read: not scanning\n");
return SANE_STATUS_INVAL;
}
if (this->cancelled)
{
DBG(1, "sanei_hp_handle_read: cancelled. Stop scan\n");
RETURN_IF_FAIL( hp_handle_stopScan(this) );
return SANE_STATUS_CANCELLED;
}
if (*lengthp == 0)
return SANE_STATUS_GOOD;
if (*lengthp > this->bytes_left)
*lengthp = this->bytes_left;
if ((nread = read(this->pipefd, buf, *lengthp)) < 0)
{
*lengthp = 0;
if (errno == EAGAIN)
return SANE_STATUS_GOOD;
DBG(1, "sanei_hp_handle_read: read from pipe: %s. Stop scan\n",
strerror(errno));
hp_handle_stopScan(this);
return SANE_STATUS_IO_ERROR;
}
this->bytes_left -= (*lengthp = nread);
if (nread > 0)
{
DBG(3, "sanei_hp_handle_read: read %lu bytes\n", (unsigned long) nread);
return SANE_STATUS_GOOD;
}
DBG(1, "sanei_hp_handle_read: EOF from pipe. Stop scan\n");
status = this->bytes_left ? SANE_STATUS_IO_ERROR : SANE_STATUS_EOF;
RETURN_IF_FAIL( hp_handle_stopScan(this) );
/* Check unload after scan */
if (status == SANE_STATUS_EOF)
{
const HpDeviceInfo *hpinfo;
hpinfo = sanei_hp_device_info_get ( this->dev->sanedev.name );
if ( hpinfo && hpinfo->unload_after_scan )
{
HpScsi scsi;
if ( sanei_hp_scsi_new(&scsi, this->dev->sanedev.name)
== SANE_STATUS_GOOD )
{
sanei_hp_scl_set(scsi, SCL_UNLOAD, 0);
sanei_hp_scsi_destroy(scsi,0);
}
}
}
return status;
}
void
sanei_hp_handle_cancel (HpHandle this)
{
this->cancelled = 1;
/* The OfficeJet K series may not deliver enough data. */
/* Therefore the read might not return until it is interrupted. */
DBG(3,"sanei_hp_handle_cancel: compat flags: 0x%04x\n",
(int)this->dev->compat);
if ( (this->reader_pid)
&& (this->dev->compat & HP_COMPAT_OJ_1150C) )
{
DBG(3,"sanei_hp_handle_cancel: send SIGTERM to child (%d)\n",
this->reader_pid);
kill(this->reader_pid, SIGTERM);
}
}
SANE_Status
sanei_hp_handle_setNonblocking (HpHandle this, hp_bool_t non_blocking)
{
if (!hp_handle_isScanning(this))
return SANE_STATUS_INVAL;
if (this->cancelled)
{
DBG(3,"sanei_hp_handle_setNonblocking: cancelled. Stop scan\n");
RETURN_IF_FAIL( hp_handle_stopScan(this) );
return SANE_STATUS_CANCELLED;
}
if (fcntl(this->pipefd, F_SETFL, non_blocking ? O_NONBLOCK : 0) < 0)
return SANE_STATUS_IO_ERROR;
return SANE_STATUS_GOOD;
}
SANE_Status
sanei_hp_handle_getPipefd (HpHandle this, SANE_Int *fd)
{
if (! hp_handle_isScanning(this))
return SANE_STATUS_INVAL;
if (this->cancelled)
{
DBG(3,"sanei_hp_handle_getPipefd: cancelled. Stop scan\n");
RETURN_IF_FAIL( hp_handle_stopScan(this) );
return SANE_STATUS_CANCELLED;
}
*fd = this->pipefd;
return SANE_STATUS_GOOD;
}
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