From b0f1a00a02e9f92f8a3c42ec90806ba4e4e532ec Mon Sep 17 00:00:00 2001
From: Zdenek Dohnal <zdohnal@redhat.com>
Date: Mon, 20 Jun 2022 18:17:58 +0200
Subject: [PATCH] Don't override color settings from print dialog

When we put print-color-mode as a default attribute, it always overrides
settings from print dialog. We need to respect those settings and transform
the known PPD options into print-color-mode options.
---
 cups/ppd-cache.c | 39 +++++++++++++++++++++++++++++++++++----
 scheduler/ipp.c  |  3 +++
 2 files changed, 38 insertions(+), 4 deletions(-)

diff --git a/cups/ppd-cache.c b/cups/ppd-cache.c
index 886181319..f72d834f5 100644
--- a/cups/ppd-cache.c
+++ b/cups/ppd-cache.c
@@ -259,15 +259,46 @@ _cupsConvertOptions(
 
   color_attr_name = print_color_mode_sup ? "print-color-mode" : "output-mode";
 
-  if ((keyword = cupsGetOption("print-color-mode", num_options, options)) == NULL)
+ /*
+  * If we use PPD with standardized PPD option for color support - ColorModel,
+  * prefer it to don't break color/grayscale support for PPDs, either classic
+  * or the ones generated from IPP Get-Printer-Attributes response.
+  */
+
+  if ((keyword = cupsGetOption("ColorModel", num_options, options)) == NULL)
   {
+   /*
+    * No ColorModel in options...
+    */
+
     if ((choice = ppdFindMarkedChoice(ppd, "ColorModel")) != NULL)
     {
-      if (!_cups_strcasecmp(choice->choice, "Gray"))
-	keyword = "monochrome";
+     /*
+      * ColorModel is taken from PPD as its default option.
+      */
+
+      if (!strcmp(choice->choice, "Gray") || !strcmp(choice->choice, "FastGray") || !strcmp(choice->choice, "DeviceGray"))
+        keyword = "monochrome";
       else
-	keyword = "color";
+        keyword = "color";
     }
+    else
+     /*
+      * print-color-mode is a default option since 2.4.1, use it as a fallback if there is no
+      * ColorModel in options or PPD...
+      */
+      keyword = cupsGetOption("print-color-mode", num_options, options);
+  }
+  else
+  {
+   /*
+    * ColorModel found in options...
+    */
+
+    if (!strcmp(keyword, "Gray") || !strcmp(keyword, "FastGray") || !strcmp(keyword, "DeviceGray"))
+      keyword = "monochrome";
+    else
+      keyword = "color";
   }
 
   if (keyword && !strcmp(keyword, "monochrome"))
diff --git a/scheduler/ipp.c b/scheduler/ipp.c
index 56bd8b304..3a849bdb5 100644
--- a/scheduler/ipp.c
+++ b/scheduler/ipp.c
@@ -2937,6 +2937,9 @@ apply_printer_defaults(
       if (!strcmp(option->name, "print-quality") && ippFindAttribute(job->attrs, "cupsPrintQuality", IPP_TAG_NAME))
         continue;                     /* Don't override cupsPrintQuality */
 
+      if (!strcmp(option->name, "print-color-mode") && ippFindAttribute(job->attrs, "ColorModel", IPP_TAG_NAME))
+        continue;                     /* Don't override ColorModel */
+
       cupsdLogJob(job, CUPSD_LOG_DEBUG, "Adding default %s=%s", option->name, option->value);
 
       num_options = cupsAddOption(option->name, option->value, num_options, &options);
-- 
2.39.2