cups/trunk/0002_do_not_set_RGB_default_on_monochrome_printers.patch

   1 From ebf3bb82593e5f49093ed7b9e52452333240d225 Mon Sep 17 00:00:00 2001
   2 From: Till Kamppeter <till.kamppeter@gmail.com>
   3 Date: Wed, 15 Feb 2023 22:01:05 +0100
   4 Subject: [PATCH] In auto-generated PPDs do not set RGB default on mono
   5  printers
   6
   7 When a PPD for a driverless printer is generated by the
   8 _ppdCreateFromIPP2() function and the get-printer-attributes IPP
   9 response gives "print-color-mode-default=auto" the PPD's default
  10 setting for "ColorModel" is always "RGB", even on monochrome printers,
  11 which makes printing fail on most devices.
  12
  13 Now we ignore the "print-color-mode-default" if set to "auto" and
  14 proceed as if no default was given, finding the default by selecting
  15 the most desirable of the existing "ColorModel" choices.
  16 ---
  17  cups/ppd-cache.c | 3 ++-
  18  1 file changed, 2 insertions(+), 1 deletion(-)
  19
  20 diff --git a/cups/ppd-cache.c b/cups/ppd-cache.c
  21 index 3c53f510d..2489ee313 100644
  22 --- a/cups/ppd-cache.c
  23 +++ b/cups/ppd-cache.c
  24 @@ -4129,7 +4129,8 @@ _ppdCreateFromIPP2(
  25      int wrote_color = 0;
  26      const char *default_color = NULL;  /* Default */
  27
  28 -    if ((keyword = ippGetString(defattr, 0, NULL)) != NULL)
  29 +    if ((keyword = ippGetString(defattr, 0, NULL)) != NULL &&
  30 +       strcmp(keyword, "auto"))
  31      {
  32        if (!strcmp(keyword, "bi-level"))
  33          default_color = "FastGray";