foo2zjs: Fix AirPrint color printing for Dell1250c

pkgs/misc/drivers/foo2zjs/default.nix

@@ -13,11 +13,15 @@ stdenv.mkDerivation rec {
 
   patches = [
     ./no-hardcode-fw.diff
-    # Support HBPL1 printers https://www.dechifro.org/hbpl/
+    # Support HBPL1 printers. Updated patch based on
+    # https://www.dechifro.org/hbpl/
     ./hbpl1.patch
     # Fix "Unimplemented paper code" error for hbpl1 printers
     # https://github.com/mikerr/foo2zjs/pull/2
     ./papercode-format-fix.patch
+    # Fix AirPrint color printing for Dell 1250c
+    # See https://github.com/OpenPrinting/cups/issues/272
+    ./dell1250c-color-fix.patch
   ];
 
   makeFlags = [

pkgs/misc/drivers/foo2zjs/dell1250c-color-fix.patch

@@ -0,0 +1,13 @@
+diff --git a/PPD/Dell-1250c.ppd b/PPD/Dell-1250c.ppd
+index 828ecd6..7e78ce4 100644
+--- a/PPD/Dell-1250c.ppd
++++ b/PPD/Dell-1250c.ppd
+@@ -95,7 +95,7 @@
+ *OpenUI *ColorMode/Color Mode: PickOne
+ *FoomaticRIPOption ColorMode: enum CmdLine A
+ *OrderDependency: 120 AnySetup *ColorMode
+-*DefaultColorMode: Monochrome
++*DefaultColorMode: Color
+ *ColorMode Color/Color: "%% FoomaticRIPOptionSetting: ColorMode=Color"
+ *FoomaticRIPOptionSetting ColorMode=Color: "-c "
+ *ColorMode Monochrome/Monochrome: "%% FoomaticRIPOptionSetting: ColorMode=Monochrome"