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Diffstat (limited to 'backend/tamarack.c')
| -rw-r--r-- | backend/tamarack.c | 1474 |
1 files changed, 1474 insertions, 0 deletions
diff --git a/backend/tamarack.c b/backend/tamarack.c new file mode 100644 index 0000000..9baec51 --- /dev/null +++ b/backend/tamarack.c @@ -0,0 +1,1474 @@ +/* sane - Scanner Access Now Easy. + Copyright (C) 1996 David Mosberger-Tang + Copyright (C) 1997 R.E.Wolff@BitWizard.nl + 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. + + Note: The exception that is mentioned in the other source files is + not here. If a case arises where you need the rights that that + exception gives you, Please do contact me, and we'll work something + out. + + R.E.Wolff@BitWizard.nl + tel: +31-152137555 + fax: +31-152138217 + + This file implements a SANE backend for Tamarack flatbed scanners. */ + +/* + This driver was written initially by changing all occurances of + "mustek" to "tamarack". This actuall worked without modification + for the manufacturer detection code! :-) + + */ + + +#include "../include/sane/config.h" + +#include <errno.h> +#include <fcntl.h> +#include <limits.h> +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/types.h> +#include <unistd.h> +#include <sys/time.h> + +#include "../include/_stdint.h" + +#include "../include/sane/sane.h" +#include "../include/sane/sanei.h" +#include "../include/sane/saneopts.h" +#include "../include/sane/sanei_scsi.h" +#include "../include/sane/sanei_thread.h" +#include "../include/sane/sanei_config.h" + +/* For timeval... */ +#ifdef DEBUG +#include <sys/time.h> +#endif + + +#define BACKEND_NAME tamarack +#include "../include/sane/sanei_backend.h" + +#include "tamarack.h" + +#ifndef PATH_MAX +# define PATH_MAX 1024 +#endif + +#define TAMARACK_CONFIG_FILE "tamarack.conf" + + +static int num_devices; +static Tamarack_Device *first_dev; +static Tamarack_Scanner *first_handle; + +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, + 0 + }; + + +static const SANE_Range u8_range = + { + 0, /* minimum */ + 255, /* maximum */ + 0 /* quantization */ + }; + + +/* David used " 100 << SANE_FIXED_SCALE_SHIFT ". This assumes that + * it is implemented that way. I want to hide the datatype. + */ +static const SANE_Range percentage_range = + { + SANE_FIX(-100), /* minimum */ + SANE_FIX( 100), /* maximum */ + SANE_FIX( 1 ) /* quantization */ + }; + +/* David used " 100 << SANE_FIXED_SCALE_SHIFT ". This assumes that + * it is implemented that way. I want to hide the datatype. + */ +static const SANE_Range abs_percentage_range = + { + SANE_FIX( 0), /* minimum */ + SANE_FIX( 100), /* maximum */ + SANE_FIX( 1 ) /* quantization */ + }; + + +#define INQ_LEN 0x60 +static const uint8_t inquiry[] = +{ + TAMARACK_SCSI_INQUIRY, 0x00, 0x00, 0x00, INQ_LEN, 0x00 +}; + +static const uint8_t test_unit_ready[] = +{ + TAMARACK_SCSI_TEST_UNIT_READY, 0x00, 0x00, 0x00, 0x00, 0x00 +}; + +static const uint8_t stop[] = +{ + TAMARACK_SCSI_START_STOP, 0x00, 0x00, 0x00, 0x00, 0x00 +}; + +static const uint8_t get_status[] = +{ + TAMARACK_SCSI_GET_DATA_STATUS, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x0c, 0x00 +}; + + + +static SANE_Status +wait_ready (int fd) +{ + SANE_Status status; + int i; + + for (i = 0; i < 1000; ++i) + { + DBG(3, "wait_ready: sending TEST_UNIT_READY\n"); + status = sanei_scsi_cmd (fd, test_unit_ready, sizeof (test_unit_ready), + 0, 0); + switch (status) + { + default: + /* Ignore errors while waiting for scanner to become ready. + Some SCSI drivers return EIO while the scanner is + returning to the home position. */ + DBG(1, "wait_ready: test unit ready failed (%s)\n", + sane_strstatus (status)); + /* fall through */ + case SANE_STATUS_DEVICE_BUSY: + usleep (100000); /* retry after 100ms */ + break; + + case SANE_STATUS_GOOD: + return status; + } + } + DBG(1, "wait_ready: timed out after %d attempts\n", i); + return SANE_STATUS_INVAL; +} + + + +static SANE_Status +sense_handler (int scsi_fd, u_char *result, void *arg) +{ + scsi_fd = scsi_fd; + arg = arg; /* silence compilation warnings */ + + switch (result[0]) + { + case 0x00: + break; + + default: + DBG(1, "sense_handler: got unknown sense code %02x\n", result[0]); + return SANE_STATUS_IO_ERROR; + } + return SANE_STATUS_GOOD; +} + + +/* XXX This might leak the memory to a TAMARACK string */ + +static SANE_Status +attach (const char *devname, Tamarack_Device **devp) +{ + char result[INQ_LEN]; + int fd; + Tamarack_Device *dev; + SANE_Status status; + size_t size; + char *mfg, *model; + char *p; + + for (dev = first_dev; dev; dev = dev->next) + if (strcmp (dev->sane.name, devname) == 0) { + if (devp) + *devp = dev; + return SANE_STATUS_GOOD; + } + + DBG(3, "attach: opening %s\n", devname); + status = sanei_scsi_open (devname, &fd, sense_handler, 0); + if (status != SANE_STATUS_GOOD) { + DBG(1, "attach: open failed (%s)\n", sane_strstatus (status)); + return SANE_STATUS_INVAL; + } + + DBG(3, "attach: sending INQUIRY\n"); + size = sizeof (result); + status = sanei_scsi_cmd (fd, inquiry, sizeof (inquiry), result, &size); + if (status != SANE_STATUS_GOOD || size != INQ_LEN) { + DBG(1, "attach: inquiry failed (%s)\n", sane_strstatus (status)); + sanei_scsi_close (fd); + return status; + } + + status = wait_ready (fd); + sanei_scsi_close (fd); + if (status != SANE_STATUS_GOOD) + return status; + + result[33]= '\0'; + p = strchr(result+16,' '); + if (p) *p = '\0'; + model = strdup (result+16); + + result[16]= '\0'; + p = strchr(result+8,' '); + if (p) *p = '\0'; + mfg = strdup (result+8); + + DBG(1, "attach: Inquiry gives mfg=%s, model=%s.\n", mfg, model); + + if (strcmp (mfg, "TAMARACK") != 0) { + DBG(1, "attach: device doesn't look like a Tamarack scanner " + "(result[0]=%#02x)\n", result[0]); + return SANE_STATUS_INVAL; + } + + dev = malloc (sizeof (*dev)); + if (!dev) + return SANE_STATUS_NO_MEM; + + memset (dev, 0, sizeof (*dev)); + + dev->sane.name = strdup (devname); + dev->sane.vendor = "Tamarack"; + dev->sane.model = model; + dev->sane.type = "flatbed scanner"; + + dev->x_range.min = 0; + dev->y_range.min = 0; + dev->x_range.quant = 0; + dev->y_range.quant = 0; + dev->dpi_range.min = SANE_FIX (1); + dev->dpi_range.quant = SANE_FIX (1); + + dev->x_range.max = SANE_FIX (8.5 * MM_PER_INCH); + dev->y_range.max = SANE_FIX (11.0 * MM_PER_INCH); + dev->dpi_range.max = SANE_FIX (600); + + DBG(3, "attach: found Tamarack scanner model %s (%s)\n", + dev->sane.model, dev->sane.type); + + ++num_devices; + dev->next = first_dev; + first_dev = dev; + + if (devp) + *devp = dev; + return SANE_STATUS_GOOD; +} + + +static size_t +max_string_size (const SANE_String_Const strings[]) +{ + size_t size, max_size = 0; + int i; + + for (i = 0; strings[i]; ++i) + { + size = strlen (strings[i]) + 1; + if (size > max_size) + max_size = size; + } + return max_size; +} + + +static SANE_Status +constrain_value (Tamarack_Scanner *s, SANE_Int option, void *value, + SANE_Int *info) +{ + return sanei_constrain_value (s->opt + option, value, info); +} + + +static unsigned char sign_mag (double val) +{ + if (val > 100) val = 100; + if (val < -100) val = -100; + if (val >= 0) return ( val); + else return ((unsigned char)(-val)) | 0x80; +} + + + +static SANE_Status +scan_area_and_windows (Tamarack_Scanner *s) +{ + struct def_win_par dwp; + + memset (&dwp,'\0',sizeof (dwp)); + dwp.dwph.opc = TAMARACK_SCSI_AREA_AND_WINDOWS; + set_triple (dwp.dwph.len,8 + sizeof (dwp.wdb)); + + set_double (dwp.wdh.wpll, sizeof (dwp.wdb)); + + dwp.wdb.winid = WINID; + set_double (dwp.wdb.xres, (int) SANE_UNFIX (s->val[OPT_RESOLUTION].w)); + set_double (dwp.wdb.yres, (int) SANE_UNFIX (s->val[OPT_RESOLUTION].w)); + + set_quad (dwp.wdb.ulx, (int) (47.2 * SANE_UNFIX (s->val[OPT_TL_X].w))); + set_quad (dwp.wdb.uly, (int) (47.2 * SANE_UNFIX (s->val[OPT_TL_Y].w))); + set_quad (dwp.wdb.width, + (int) (47.2 * SANE_UNFIX (s->val[OPT_BR_X].w - s->val[OPT_TL_X].w))); + set_quad (dwp.wdb.length, + (int) (47.2 * SANE_UNFIX (s->val[OPT_BR_Y].w - s->val[OPT_TL_Y].w))); + + dwp.wdb.brightness = sign_mag (SANE_UNFIX (s->val[OPT_BRIGHTNESS].w)); + dwp.wdb.contrast = sign_mag (SANE_UNFIX (s->val[OPT_CONTRAST].w)); + dwp.wdb.thresh = 0x80; + + + switch (s->mode) { + case THRESHOLDED: + dwp.wdb.bpp = 1; + dwp.wdb.image_comp = 0; + dwp.wdb.thresh = 1 + 2.55 * (SANE_UNFIX (s->val[OPT_THRESHOLD].w)); + break; + case DITHERED: + dwp.wdb.bpp = 1; + dwp.wdb.image_comp = 1; + break; + case GREYSCALE: + dwp.wdb.bpp = 8; + dwp.wdb.image_comp = 2; + break; + case TRUECOLOR: + dwp.wdb.bpp = 8; + dwp.wdb.image_comp = 2; + break; + default: + DBG(1, "Invalid mode. %d\n", s->mode); + return SANE_STATUS_INVAL; + } + DBG(1, "bright, thresh, contrast = %d(%5.1f), %d, %d(%5.1f)\n", + dwp.wdb.brightness, SANE_UNFIX (s->val[OPT_BRIGHTNESS].w), + dwp.wdb.thresh , + dwp.wdb.contrast , SANE_UNFIX (s->val[OPT_CONTRAST].w)); + + set_double (dwp.wdb.halftone, 1); /* XXX What does this do again ? */ + dwp.wdb.pad_type = 3; /* This is the only usable pad-type. */ + dwp.wdb.exposure = 0x6f; /* XXX Option? */ + dwp.wdb.compr_type = 0; + + /* XXX Shouldn't this be sizeof (dwp) */ + return sanei_scsi_cmd (s->fd, &dwp, (10+8+38), 0, 0); +} + + +static SANE_Status +mode_select (Tamarack_Scanner *s) +{ + struct { + struct command_header cmd; + struct page_header hdr; + struct tamarack_page page; + } c; + + memset (&c, '\0', sizeof (c)); + c.cmd.opc = TAMARACK_SCSI_MODE_SELECT; + c.cmd.pad0[0] = 0x10; /* Suddenly the pad bytes are no long pad... */ + c.cmd.pad0[1] = 0; + c.cmd.len = sizeof (struct page_header) + sizeof (struct tamarack_page); + c.hdr.code = 0; + c.hdr.length = 6; + c.page.gamma = 2; + c.page.thresh = 0x80; /* XXX Option? */ + switch (s->mode) { + case THRESHOLDED: + case DITHERED: + case GREYSCALE: + c.page.masks = 0x80; + break; + case TRUECOLOR: + c.page.masks = 0x40 >> s->pass; + break; + } + c.page.delay = 0x10; /* XXX Option? */ + c.page.features = (s->val[OPT_TRANS].w ? TAM_TRANS_ON:0) | 1; + return sanei_scsi_cmd (s->fd, &c, sizeof (c), 0, 0); +} + + +static SANE_Status +start_scan (Tamarack_Scanner *s) +{ + struct { + struct command_header cmd; + unsigned char winid[1]; + } c; + + memset (&c,'\0',sizeof (c)); + c.cmd.opc = TAMARACK_SCSI_START_STOP; + c.cmd.len = sizeof (c.winid); + c.winid[0] = WINID; + return sanei_scsi_cmd (s->fd, &c, sizeof (c), 0, 0); +} + + +static SANE_Status +stop_scan (Tamarack_Scanner *s) +{ + /* XXX I don't think a TAMARACK can stop in mid-scan. Just stop + sending it requests for data.... + */ + return sanei_scsi_cmd (s->fd, stop, sizeof (stop), 0, 0); +} + + +static SANE_Status +do_eof (Tamarack_Scanner *s) +{ + if (s->pipe >= 0) + { + close (s->pipe); + s->pipe = -1; + } + return SANE_STATUS_EOF; +} + + +static SANE_Status +do_cancel (Tamarack_Scanner *s) +{ + s->scanning = SANE_FALSE; + s->pass = 0; + + do_eof (s); + + if (s->reader_pid != -1) + { + int exit_status; + + /* ensure child knows it's time to stop: */ + sanei_thread_kill (s->reader_pid); + sanei_thread_waitpid (s->reader_pid, &exit_status); + s->reader_pid = -1; + } + + if (s->fd >= 0) + { + stop_scan (s); + sanei_scsi_close (s->fd); + s->fd = -1; + } + + return SANE_STATUS_CANCELLED; +} + + +static SANE_Status +get_image_status (Tamarack_Scanner *s) +{ + uint8_t result[12]; + SANE_Status status; + size_t len; + int busy; + +#if 1 + do + { + len = sizeof (result); + status = sanei_scsi_cmd (s->fd, get_status, sizeof (get_status), + result, &len); + if ((status != SANE_STATUS_GOOD) && (status != SANE_STATUS_DEVICE_BUSY)) + return status; + + busy = (result[2] != 8) || (status == SANE_STATUS_DEVICE_BUSY); + if (busy) + usleep (100000); + + if (!s->scanning) + return do_cancel (s); + } + while (busy); +#else + /* XXX Test if this works one day... */ + wait_ready (s); +#endif + + len = sizeof (result); + status = sanei_scsi_cmd (s->fd, get_status, sizeof (get_status), + result, &len); + if ((status != SANE_STATUS_GOOD) && (status != SANE_STATUS_DEVICE_BUSY)) + return status; + + s->params.bytes_per_line = + result[ 8] | (result[ 7] << 8) | (result[6] << 16); + s->params.lines = + result[11] | (result[10] << 8) | (result[9] << 16); + + switch (s->mode) { + case DITHERED: + case THRESHOLDED: + s->params.pixels_per_line = 8 * s->params.bytes_per_line; + break; + case GREYSCALE: + case TRUECOLOR: + s->params.pixels_per_line = s->params.bytes_per_line; + break; + } + + + DBG(1, "get_image_status: bytes_per_line=%d, lines=%d\n", + s->params.bytes_per_line, s->params.lines); + return SANE_STATUS_GOOD; +} + + +static SANE_Status +read_data (Tamarack_Scanner *s, SANE_Byte *buf, int lines, int bpl) +{ + struct command_header_10 cmd; + size_t nbytes; + SANE_Status status; +#ifdef DEBUG + int dt; + struct timeval tv_start,tv_end; +#endif + + nbytes = bpl * lines; + memset (&cmd,'\0',sizeof (cmd)); + cmd.opc = 0x28; + set_triple (cmd.len,nbytes); + +#ifdef DEBUG + if (verbose) DBG (1, "Doing read_data... \n"); + gettimeofday (&tv_start,NULL); +#endif + + status = sanei_scsi_cmd (s->fd, &cmd, sizeof (cmd), buf, &nbytes); + +#ifdef DEBUG + gettimeofday (&tv_end,NULL); + dt = tv_end.tv_usec - tv_start.tv_usec + + (tv_end.tv_sec - tv_start.tv_sec) * 1000000; + if (verbose) DBG(1, "Read took %d.%06d seconds.", + dt/1000000,dt%1000000); + dt = 1000000 * nbytes / dt; + if (verbose) DBG(1, "which is %d.%03d bytes per second.\n",dt,0); +#endif + return status; +} + + + +static SANE_Status +init_options (Tamarack_Scanner *s) +{ + int i; + + memset (s->opt, 0, sizeof (s->opt)); + memset (s->val, 0, sizeof (s->val)); + + 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].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].cap = SANE_CAP_SOFT_DETECT; + s->val[OPT_NUM_OPTS].w = NUM_OPTIONS; + + /* "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; + s->opt[OPT_MODE_GROUP].constraint_type = SANE_CONSTRAINT_NONE; + + /* 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 = "Select the scan mode"; + s->opt[OPT_MODE].type = SANE_TYPE_STRING; + s->opt[OPT_MODE].size = max_string_size (mode_list); + s->opt[OPT_MODE].constraint_type = SANE_CONSTRAINT_STRING_LIST; + s->opt[OPT_MODE].constraint.string_list = mode_list; + s->val[OPT_MODE].s = strdup (mode_list[OPT_MODE_DEFAULT]); + + /* 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_FIXED; + 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 = SANE_FIX (OPT_RESOLUTION_DEFAULT); + + /* 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; + + /* gray preview */ + s->opt[OPT_GRAY_PREVIEW].name = SANE_NAME_GRAY_PREVIEW; + s->opt[OPT_GRAY_PREVIEW].title = SANE_TITLE_GRAY_PREVIEW; + s->opt[OPT_GRAY_PREVIEW].desc = SANE_DESC_GRAY_PREVIEW; + s->opt[OPT_GRAY_PREVIEW].type = SANE_TYPE_BOOL; + s->val[OPT_GRAY_PREVIEW].w = SANE_FALSE; + + /* "Geometry" group: */ + s->opt[OPT_GEOMETRY_GROUP].title = "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; + s->opt[OPT_GEOMETRY_GROUP].constraint_type = SANE_CONSTRAINT_NONE; + + /* 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 = 0; + + /* 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 = 0; + + /* 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 = s->hw->x_range.max; + + /* 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 = s->hw->y_range.max; + + /* "Enhancement" group: */ + s->opt[OPT_ENHANCEMENT_GROUP].title = "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; + + /* transparency adapter. */ + s->opt[OPT_TRANS].name = "transparency"; + s->opt[OPT_TRANS].title = "transparency"; + s->opt[OPT_TRANS].desc = "Turn on the transparency adapter."; + s->opt[OPT_TRANS].type = SANE_TYPE_BOOL; + s->opt[OPT_TRANS].unit = SANE_UNIT_NONE; + s->val[OPT_TRANS].w = SANE_FALSE; + + /* 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 + " This option is active for lineart/halftone modes only. " + "For multibit modes (grey/color) use the gamma-table(s)."; + 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 = SANE_FIX(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 + " This option is active for lineart/halftone modes only. " + "For multibit modes (grey/color) use the gamma-table(s)."; + 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 = SANE_FIX(0); + + /* Threshold */ + s->opt[OPT_THRESHOLD].name = "Threshold"; + s->opt[OPT_THRESHOLD].title = "Threshold"; + s->opt[OPT_THRESHOLD].desc = "Threshold: below this level is black, above is white" + " This option is active for bitmap modes only. "; + s->opt[OPT_THRESHOLD].type = SANE_TYPE_FIXED; + s->opt[OPT_THRESHOLD].unit = SANE_UNIT_PERCENT; + s->opt[OPT_THRESHOLD].constraint_type = SANE_CONSTRAINT_RANGE; + s->opt[OPT_THRESHOLD].constraint.range = &abs_percentage_range; + s->val[OPT_THRESHOLD].w = SANE_FIX(50); + s->opt[OPT_THRESHOLD].cap |= SANE_CAP_INACTIVE; + +#if 0 + /* 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->opt[OPT_CUSTOM_GAMMA].cap |= SANE_CAP_INACTIVE; + s->val[OPT_CUSTOM_GAMMA].w = SANE_FALSE; + + /* 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].cap |= SANE_CAP_INACTIVE; + s->opt[OPT_GAMMA_VECTOR].unit = SANE_UNIT_NONE; + s->opt[OPT_GAMMA_VECTOR].size = 256 * sizeof (SANE_Word); + s->opt[OPT_GAMMA_VECTOR].constraint_type = SANE_CONSTRAINT_RANGE; + s->opt[OPT_GAMMA_VECTOR].constraint.range = &u8_range; + s->val[OPT_GAMMA_VECTOR].wa = &s->gamma_table[0][0]; + + /* 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].cap |= SANE_CAP_INACTIVE; + s->opt[OPT_GAMMA_VECTOR_R].unit = SANE_UNIT_NONE; + s->opt[OPT_GAMMA_VECTOR_R].size = 256 * sizeof (SANE_Word); + s->opt[OPT_GAMMA_VECTOR_R].constraint_type = SANE_CONSTRAINT_RANGE; + s->opt[OPT_GAMMA_VECTOR_R].constraint.range = &u8_range; + s->val[OPT_GAMMA_VECTOR_R].wa = &s->gamma_table[1][0]; + + /* 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].cap |= SANE_CAP_INACTIVE; + s->opt[OPT_GAMMA_VECTOR_G].unit = SANE_UNIT_NONE; + s->opt[OPT_GAMMA_VECTOR_G].size = 256 * sizeof (SANE_Word); + s->opt[OPT_GAMMA_VECTOR_G].constraint_type = SANE_CONSTRAINT_RANGE; + s->opt[OPT_GAMMA_VECTOR_G].constraint.range = &u8_range; + s->val[OPT_GAMMA_VECTOR_G].wa = &s->gamma_table[2][0]; + + /* 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].cap |= SANE_CAP_INACTIVE; + s->opt[OPT_GAMMA_VECTOR_B].unit = SANE_UNIT_NONE; + s->opt[OPT_GAMMA_VECTOR_B].size = 256 * sizeof (SANE_Word); + s->opt[OPT_GAMMA_VECTOR_B].constraint_type = SANE_CONSTRAINT_RANGE; + s->opt[OPT_GAMMA_VECTOR_B].constraint.range = &u8_range; + s->val[OPT_GAMMA_VECTOR_B].wa = &s->gamma_table[3][0]; +#endif + return SANE_STATUS_GOOD; +} + + +/* This function is executed as a child process. The reason this is + executed as a subprocess is because some (most?) generic SCSI + interfaces block a SCSI request until it has completed. With a + subprocess, we can let it block waiting for the request to finish + while the main process can go about to do more important things + (such as recognizing when the user presses a cancel button). + + WARNING: Since this is executed as a subprocess, it's NOT possible + to update any of the variables in the main process (in particular + the scanner state cannot be updated). */ +static int +reader_process (void *scanner) +{ + Tamarack_Scanner *s = (Tamarack_Scanner *) scanner; + int fd = s->reader_pipe; + + SANE_Byte *data; + int lines_per_buffer, bpl; + SANE_Status status; + sigset_t sigterm_set; + sigset_t ignore_set; + struct SIGACTION act; + FILE *fp; + + if (sanei_thread_is_forked()) close (s->pipe); + + 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); + + sigemptyset (&sigterm_set); + sigaddset (&sigterm_set, SIGTERM); + + fp = fdopen (fd, "w"); + if (!fp) + return 1; + + bpl = s->params.bytes_per_line; + + lines_per_buffer = sanei_scsi_max_request_size / bpl; + if (!lines_per_buffer) + return 2; /* resolution is too high */ + + /* Limit the size of a single transfer to one inch. + XXX Add a stripsize option. */ + if (lines_per_buffer > SANE_UNFIX (s->val[OPT_RESOLUTION].w)) + lines_per_buffer = SANE_UNFIX (s->val[OPT_RESOLUTION].w); + + DBG(3, "lines_per_buffer=%d, bytes_per_line=%d\n", lines_per_buffer, bpl); + + data = malloc (lines_per_buffer * bpl); + + for (s->line = 0; s->line < s->params.lines; s->line += lines_per_buffer) { + if (s->line + lines_per_buffer > s->params.lines) + /* do the last few lines: */ + lines_per_buffer = s->params.lines - s->line; + + sigprocmask (SIG_BLOCK, &sigterm_set, 0); + status = read_data (s, data, lines_per_buffer, bpl); + sigprocmask (SIG_UNBLOCK, &sigterm_set, 0); + if (status != SANE_STATUS_GOOD) { + DBG(1, "reader_process: read_data failed with status=%d\n", status); + return 3; + } + DBG(3, "reader_process: read %d lines\n", lines_per_buffer); + + if ((s->mode == TRUECOLOR) || (s->mode == GREYSCALE)) { + fwrite (data, lines_per_buffer, bpl, fp); + } else { + /* in singlebit mode, the scanner returns 1 for black. ;-( --DM */ + /* Hah! Same for Tamarack... -- REW */ + int i; + + for (i = 0; i < lines_per_buffer * bpl; ++i) + fputc (~data[i], fp); + } + } + fclose (fp); + return 0; +} + + +static SANE_Status +attach_one (const char *dev) +{ + attach (dev, 0); + return SANE_STATUS_GOOD; +} + + +SANE_Status +sane_init (SANE_Int *version_code, SANE_Auth_Callback authorize) +{ + char dev_name[PATH_MAX]; + size_t len; + FILE *fp; + + authorize = authorize; /* silence compilation warnings */ + + DBG_INIT(); + + sanei_thread_init(); + + if (version_code) + *version_code = SANE_VERSION_CODE (SANE_CURRENT_MAJOR, V_MINOR, 0); + + fp = sanei_config_open (TAMARACK_CONFIG_FILE); + if (!fp) { + /* default to /dev/scanner instead of insisting on config file */ + attach ("/dev/scanner", 0); + return SANE_STATUS_GOOD; + } + + while (sanei_config_read (dev_name, sizeof (dev_name), fp)) { + if (dev_name[0] == '#') /* ignore line comments */ + continue; + len = strlen (dev_name); + + if (!len) + continue; /* ignore empty lines */ + + sanei_config_attach_matching_devices (dev_name, attach_one); + } + fclose (fp); + return SANE_STATUS_GOOD; +} + + +void +sane_exit (void) +{ + Tamarack_Device *dev, *next; + + for (dev = first_dev; dev; dev = next) { + next = dev->next; + free ((void *) dev->sane.name); + free ((void *) dev->sane.model); + free (dev); + } +} + +SANE_Status +sane_get_devices (const SANE_Device ***device_list, SANE_Bool local_only) +{ + static const SANE_Device **devlist = 0; + Tamarack_Device *dev; + int i; + + local_only = local_only; /* silence compilation warnings */ + + if (devlist) + free (devlist); + + devlist = malloc ((num_devices + 1) * sizeof (devlist[0])); + if (!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; +} + + +SANE_Status +sane_open (SANE_String_Const devicename, SANE_Handle *handle) +{ + Tamarack_Device *dev; + SANE_Status status; + Tamarack_Scanner *s; + int i, j; + + 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 devicname -> 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->fd = -1; + s->pipe = -1; + s->hw = dev; + for (i = 0; i < 4; ++i) + for (j = 0; j < 256; ++j) + s->gamma_table[i][j] = j; + + 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) +{ + Tamarack_Scanner *prev, *s; + + /* 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(1, "close: invalid handle %p\n", handle); + return; /* oops, not a handle we know about */ + } + + if (s->scanning) + do_cancel (handle); + + if (prev) + prev->next = s->next; + else + first_handle = s->next; + + free (handle); +} + + +const SANE_Option_Descriptor * +sane_get_option_descriptor (SANE_Handle handle, SANE_Int option) +{ + Tamarack_Scanner *s = handle; + + if ((unsigned) option >= NUM_OPTIONS) + return 0; + return s->opt + option; +} + + + +static int make_mode (char *mode) +{ + if (strcmp (mode, SANE_VALUE_SCAN_MODE_LINEART) == 0) + return THRESHOLDED; + if (strcmp (mode, SANE_VALUE_SCAN_MODE_HALFTONE) == 0) + return DITHERED; + else if (strcmp (mode, SANE_VALUE_SCAN_MODE_GRAY) == 0) + return GREYSCALE; + else if (strcmp (mode, SANE_VALUE_SCAN_MODE_COLOR) == 0) + return TRUECOLOR; + + return -1; +} + + +SANE_Status +sane_control_option (SANE_Handle handle, SANE_Int option, + SANE_Action action, void *val, SANE_Int *info) +{ + Tamarack_Scanner *s = handle; + SANE_Status status; + SANE_Word cap; + + if (info) + *info = 0; + + if (s->scanning) + return SANE_STATUS_DEVICE_BUSY; + + if (option >= NUM_OPTIONS) + return SANE_STATUS_INVAL; + + cap = s->opt[option].cap; + + if (!SANE_OPTION_IS_ACTIVE (cap)) + return SANE_STATUS_INVAL; + + if (action == SANE_ACTION_GET_VALUE) { + switch (option) { + /* word options: */ + case OPT_PREVIEW: + case OPT_GRAY_PREVIEW: + case OPT_RESOLUTION: + case OPT_TL_X: + case OPT_TL_Y: + case OPT_BR_X: + case OPT_BR_Y: + case OPT_NUM_OPTS: + case OPT_TRANS: + case OPT_BRIGHTNESS: + case OPT_CONTRAST: + case OPT_THRESHOLD: +#if 0 + case OPT_CUSTOM_GAMMA: +#endif + *(SANE_Word *) val = s->val[option].w; + return SANE_STATUS_GOOD; + +#if 0 + /* word-array options: */ + case OPT_GAMMA_VECTOR: + case OPT_GAMMA_VECTOR_R: + case OPT_GAMMA_VECTOR_G: + case OPT_GAMMA_VECTOR_B: + memcpy (val, s->val[option].wa, s->opt[option].size); + return SANE_STATUS_GOOD; +#endif + + /* string options: */ + case OPT_MODE: + strcpy (val, s->val[option].s); + return SANE_STATUS_GOOD; + } + } else if (action == SANE_ACTION_SET_VALUE) { + if (!SANE_OPTION_IS_SETTABLE (cap)) + return SANE_STATUS_INVAL; + + status = constrain_value (s, option, val, info); + if (status != SANE_STATUS_GOOD) + return status; + + switch (option) + { + /* (mostly) side-effect-free word options: */ + case OPT_RESOLUTION: + case OPT_TL_X: + case OPT_TL_Y: + case OPT_BR_X: + case OPT_BR_Y: + if (info) + *info |= SANE_INFO_RELOAD_PARAMS; + /* fall through */ + case OPT_PREVIEW: + case OPT_GRAY_PREVIEW: + case OPT_BRIGHTNESS: + case OPT_CONTRAST: + case OPT_THRESHOLD: + case OPT_TRANS: + s->val[option].w = *(SANE_Word *) val; + return SANE_STATUS_GOOD; + +#if 0 + /* side-effect-free word-array options: */ + case OPT_GAMMA_VECTOR: + case OPT_GAMMA_VECTOR_R: + case OPT_GAMMA_VECTOR_G: + case OPT_GAMMA_VECTOR_B: + memcpy (s->val[option].wa, val, s->opt[option].size); + return SANE_STATUS_GOOD; + + /* options with side-effects: */ + + case OPT_CUSTOM_GAMMA: + w = *(SANE_Word *) val; + if (w == s->val[OPT_CUSTOM_GAMMA].w) + return SANE_STATUS_GOOD; /* no change */ + + s->val[OPT_CUSTOM_GAMMA].w = w; + if (w) { + s->mode = make_mode (s->val[OPT_MODE].s); + + if (s->mode == GREYSCALE) { + s->opt[OPT_GAMMA_VECTOR].cap &= ~SANE_CAP_INACTIVE; + } else if (s->mode == TRUECOLOR) { + 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; + } + } else { + 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 (info) + *info |= SANE_INFO_RELOAD_OPTIONS; + return SANE_STATUS_GOOD; +#endif + + case OPT_MODE: + { + + if (s->val[option].s) + free (s->val[option].s); + s->val[option].s = strdup (val); + + s->mode = make_mode (s->val[OPT_MODE].s); + + if (info) + *info |= SANE_INFO_RELOAD_OPTIONS | SANE_INFO_RELOAD_PARAMS; + + s->opt[OPT_BRIGHTNESS].cap |= SANE_CAP_INACTIVE; + s->opt[OPT_CONTRAST].cap |= SANE_CAP_INACTIVE; + s->opt[OPT_THRESHOLD].cap |= SANE_CAP_INACTIVE; +#if 0 + 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; +#endif + + + if (strcmp (val, SANE_VALUE_SCAN_MODE_LINEART) == 0) + s->opt[OPT_THRESHOLD].cap &= ~SANE_CAP_INACTIVE; + else { + s->opt[OPT_BRIGHTNESS].cap &= ~SANE_CAP_INACTIVE; + s->opt[OPT_CONTRAST].cap &= ~SANE_CAP_INACTIVE; + } +#if 0 + if (!binary) + s->opt[OPT_CUSTOM_GAMMA].cap &= ~SANE_CAP_INACTIVE; + + if (s->val[OPT_CUSTOM_GAMMA].w) { + if (strcmp (val, SANE_VALUE_SCAN_MODE_GRAY) == 0) + s->opt[OPT_GAMMA_VECTOR].cap &= ~SANE_CAP_INACTIVE; + else if (strcmp (val, SANE_VALUE_SCAN_MODE_COLOR) == 0) { + 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; + } + } +#endif + return SANE_STATUS_GOOD; + } + } + } + return SANE_STATUS_INVAL; +} + + +SANE_Status +sane_get_parameters (SANE_Handle handle, SANE_Parameters *params) +{ + Tamarack_Scanner *s = handle; + + if (!s->scanning) { + double width, height, dpi; + + + memset (&s->params, 0, sizeof (s->params)); + + width = SANE_UNFIX (s->val[OPT_BR_X].w - s->val[OPT_TL_X].w); + height = SANE_UNFIX (s->val[OPT_BR_Y].w - s->val[OPT_TL_Y].w); + dpi = SANE_UNFIX (s->val[OPT_RESOLUTION].w); + s->mode = make_mode (s->val[OPT_MODE].s); + DBG(1, "got mode '%s' -> %d.\n", s->val[OPT_MODE].s, s->mode); + /* make best-effort guess at what parameters will look like once + scanning starts. */ + if (dpi > 0.0 && width > 0.0 && height > 0.0) { + double dots_per_mm = dpi / MM_PER_INCH; + + s->params.pixels_per_line = width * dots_per_mm; + s->params.lines = height * dots_per_mm; + } + if ((s->mode == THRESHOLDED) || (s->mode == DITHERED)) { + s->params.format = SANE_FRAME_GRAY; + s->params.bytes_per_line = (s->params.pixels_per_line + 7) / 8; + s->params.depth = 1; + } else if (s->mode == GREYSCALE) { + s->params.format = SANE_FRAME_GRAY; + s->params.bytes_per_line = s->params.pixels_per_line; + s->params.depth = 8; + } else { + s->params.format = SANE_FRAME_RED + s->pass; + s->params.bytes_per_line = s->params.pixels_per_line; + s->params.depth = 8; + } + s->pass = 0; + } else { + if (s->mode == TRUECOLOR) + s->params.format = SANE_FRAME_RED + s->pass; + } + + s->params.last_frame = (s->mode != TRUECOLOR) || (s->pass == 2); + + if (params) + *params = s->params; + + DBG(1, "Got parameters: format:%d, ppl: %d, bpl:%d, depth:%d, " + "last %d pass %d\n", + s->params.format, s->params.pixels_per_line, + s->params.bytes_per_line, s->params.depth, + s->params.last_frame, s->pass); + return SANE_STATUS_GOOD; +} + + +SANE_Status +sane_start (SANE_Handle handle) +{ + Tamarack_Scanner *s = handle; + SANE_Status status; + int fds[2]; + + /* First make sure we have a current parameter set. Some of the + parameters will be overwritten below, but that's OK. */ + status = sane_get_parameters (s, 0); + + if (status != SANE_STATUS_GOOD) + return status; + + if (s->fd < 0) { + /* translate options into s->mode for convenient access: */ + s->mode = make_mode (s->val[OPT_MODE].s); + + if (s->mode == TRUECOLOR) + { + if (s->val[OPT_PREVIEW].w && s->val[OPT_GRAY_PREVIEW].w) { + /* Force gray-scale mode when previewing. */ + s->mode = GREYSCALE; + s->params.format = SANE_FRAME_GRAY; + s->params.bytes_per_line = s->params.pixels_per_line; + s->params.last_frame = SANE_TRUE; + } + } + + status = sanei_scsi_open (s->hw->sane.name, &s->fd, sense_handler, 0); + if (status != SANE_STATUS_GOOD) { + DBG(1, "open: open of %s failed: %s\n", + s->hw->sane.name, sane_strstatus (status)); + return status; + } + } + + status = wait_ready (s->fd); + if (status != SANE_STATUS_GOOD) { + DBG(1, "open: wait_ready() failed: %s\n", sane_strstatus (status)); + goto stop_scanner_and_return; + } + + status = scan_area_and_windows (s); + if (status != SANE_STATUS_GOOD) { + DBG(1, "open: set scan area command failed: %s\n", + sane_strstatus (status)); + goto stop_scanner_and_return; + } + + status = mode_select (s); + if (status != SANE_STATUS_GOOD) + goto stop_scanner_and_return; + + s->scanning = SANE_TRUE; + + status = start_scan (s); + if (status != SANE_STATUS_GOOD) + goto stop_scanner_and_return; + + status = get_image_status (s); + if (status != SANE_STATUS_GOOD) + goto stop_scanner_and_return; + + s->line = 0; + + if (pipe (fds) < 0) + return SANE_STATUS_IO_ERROR; + + s->pipe = fds[0]; + s->reader_pipe = fds[1]; + s->reader_pid = sanei_thread_begin (reader_process, (void *) s); + + if (sanei_thread_is_forked()) close (s->reader_pipe); + + return SANE_STATUS_GOOD; + +stop_scanner_and_return: + do_cancel (s); + return status; +} + + +SANE_Status +sane_read (SANE_Handle handle, SANE_Byte *buf, SANE_Int max_len, SANE_Int *len) +{ + Tamarack_Scanner *s = handle; + ssize_t nread; + + *len = 0; + + nread = read (s->pipe, buf, max_len); + DBG(3, "read %ld bytes\n", (long) nread); + + if (!s->scanning) + return do_cancel (s); + + if (nread < 0) { + if (errno == EAGAIN) { + return SANE_STATUS_GOOD; + } else { + do_cancel (s); + return SANE_STATUS_IO_ERROR; + } + } + + *len = nread; + + if (nread == 0) { + s->pass++; + return do_eof (s); + } + return SANE_STATUS_GOOD; +} + + +void +sane_cancel (SANE_Handle handle) +{ + Tamarack_Scanner *s = handle; + + if (s->reader_pid != -1) + sanei_thread_kill (s->reader_pid); + s->scanning = SANE_FALSE; +} + + +SANE_Status +sane_set_io_mode (SANE_Handle handle, SANE_Bool non_blocking) +{ + Tamarack_Scanner *s = handle; + + if (!s->scanning) + return SANE_STATUS_INVAL; + + if (fcntl (s->pipe, F_SETFL, non_blocking ? O_NONBLOCK : 0) < 0) + return SANE_STATUS_IO_ERROR; + + return SANE_STATUS_GOOD; +} + + +SANE_Status +sane_get_select_fd (SANE_Handle handle, SANE_Int *fd) +{ + Tamarack_Scanner *s = handle; + + if (!s->scanning) + return SANE_STATUS_INVAL; + + *fd = s->pipe; + return SANE_STATUS_GOOD; +} + |