New upstream version 1.2.1upstream/1.2.1

1 files changed, 37 insertions, 19 deletions

diff --git a/backend/fujitsu.c b/backend/fujitsu.c
index d17e015..52d0988 100644
--- a/backend/fujitsu.c
+++ b/backend/fujitsu.c
@@ -6,7 +6,7 @@
    Copyright (C) 2000 Randolph Bentson
    Copyright (C) 2001 Frederik Ramm
    Copyright (C) 2001-2004 Oliver Schirrmeister
-   Copyright (C) 2003-2021 m. allan noah
+   Copyright (C) 2003-2022 m. allan noah
 
    JPEG output and low memory usage support funded by:
      Archivista GmbH, www.archivista.ch
@@ -15,7 +15,7 @@
    Automatic length detection support funded by:
      Martin G. Miller, mgmiller at optonline.net
    Software image enhancement routines and recent scanner support funded by:
-     Fujitsu Computer Products of America, Inc. www.fcpa.com
+     PFU America, Inc., fujitsuscanners.com
 
    --------------------------------------------------------------------------
 
@@ -611,6 +611,11 @@
          - fix JPEG duplex memory corruption
          - change window_gamma init (fixes bright/contrast for iX1500)
          - only call send_lut after set_window (remove late_lut)
+      v138 2022-06-01, MAN
+         - minor updates to company name (FCPA -> PFU)
+      v139 2022-11-15, MAN
+         - move updated window_gamma logic to set_window
+         - use internal gamma table if possible (fixes #618)
 
    SANE FLOW DIAGRAM
 
@@ -660,7 +665,7 @@
 #include "fujitsu.h"
 
 #define DEBUG 1
-#define BUILD 137
+#define BUILD 139
 
 /* values for SANE_DEBUG_FUJITSU env var:
  - errors           5
@@ -764,7 +769,7 @@ static struct fujitsu *fujitsu_devList = NULL;
 SANE_Status
 sane_init (SANE_Int * version_code, SANE_Auth_Callback authorize)
 {
-  authorize = authorize;        /* get rid of compiler warning */
+  (void) authorize;             /* get rid of compiler warning */
 
   DBG_INIT ();
   DBG (10, "sane_init: start\n");
@@ -819,7 +824,7 @@ sane_get_devices (const SANE_Device *** device_list, SANE_Bool local_only)
   int num_devices=0;
   int i=0;
 
-  local_only = local_only;        /* get rid of compiler warning */
+  (void) local_only;            /* get rid of compiler warning */
 
   DBG (10, "sane_get_devices: start\n");
 
@@ -2107,12 +2112,6 @@ init_model (struct fujitsu *s)
   s->ppl_mod_by_mode[MODE_GRAYSCALE] = 1;
   s->ppl_mod_by_mode[MODE_COLOR] = 1;
 
-  /* we prefer to use the downloaded (LUT) gamma table (0x80) if possible.
-   * but if scanner has only built-in gamma tables, we use the first one (0) */
-  if (s->num_download_gamma){
-    s->window_gamma = 0x80;
-  }
-
   /* endorser type tells string length (among other things) */
   if(s->has_endorser_b){
     /*old-style is 40 bytes*/
@@ -2206,7 +2205,10 @@ init_model (struct fujitsu *s)
     s->color_interlace = COLOR_INTERLACE_3091;
     s->duplex_interlace = DUPLEX_INTERLACE_3091;
     s->ghs_in_rs = 1;
-    s->window_gamma = 0;
+
+    /* might be inaccurate */
+    s->num_internal_gamma = 1;
+    s->num_download_gamma = 0;
 
     s->reverse_by_mode[MODE_LINEART] = 1;
     s->reverse_by_mode[MODE_HALFTONE] = 1;
@@ -7055,12 +7057,11 @@ sane_start (SANE_Handle handle)
         goto errors;
       }
 
-      /* send lut if scanner has no hardware brightness/contrast,
-       * or we are going to ask it to use a downloaded gamma table */
-      if (!s->brightness_steps || !s->contrast_steps || s->window_gamma & 0x80){
+      /* send lut if set_window said we would */
+      if ( s->window_gamma ){
         ret = send_lut(s);
         if (ret != SANE_STATUS_GOOD)
-          DBG (5, "sane_start: WARNING: cannot late send_lut %d\n", ret);
+          DBG (5, "sane_start: WARNING: cannot send_lut %d\n", ret);
       }
 
       /* some scanners need the q table sent, even when not scanning jpeg */
@@ -7614,6 +7615,23 @@ set_window (struct fujitsu *s)
   /* the remainder of the block varies based on model and mode,
    * except for gamma and paper size, those are in the same place */
 
+  /* determine if we need to send gamma LUT.
+   * send lut if scanner supports it and any of:
+   * has no hardware brightness but user changed it
+   * has no hardware contrast but user changed it
+   * has no internal gamma table */
+  if ( s->num_download_gamma && (
+       (!s->brightness_steps && s->brightness != 0)
+    || (!s->contrast_steps && s->contrast != 0 )
+    || !s->num_internal_gamma
+  ) ){
+    s->window_gamma = 0x80;
+  }
+  /* otherwise, use the internal table */
+  else{
+    s->window_gamma = 0;
+  }
+
   /*vuid c0*/
   if(s->has_vuid_3091){
     set_WD_vendor_id_code (desc1, WD_VUID_3091);
@@ -9270,7 +9288,7 @@ sense_handler (int fd, unsigned char * sensed_data, void *arg)
   DBG (5, "sense_handler: start\n");
 
   /* kill compiler warning */
-  fd = fd;
+  (void) fd;
 
   /* copy the rs return data into the scanner struct
      so that the caller can use it if he wants */
@@ -9605,8 +9623,8 @@ do_scsi_cmd(struct fujitsu *s, int runRS, int shortTime,
   int ret;
 
   /*shut up compiler*/
-  runRS=runRS;
-  shortTime=shortTime;
+  (void) runRS;
+  (void) shortTime;
 
   DBG(10, "do_scsi_cmd: start\n");