Add support for custom resource parameters

And allow users to skip a precise loader using them


Former-commit-id: 297af2e4a24ad67c343aae5d89352abf4ea05f63

src/Nazara/Utility/Formats/PCXLoader.cpp

@@ -47,7 +47,9 @@ namespace Nz
 
 		Ternary Check(Stream& stream, const ImageParams& parameters)
 		{
-			NazaraUnused(parameters);
+			bool skip;
+			if (parameters.custom.GetBooleanParameter("NativePCXLoader_Skip", &skip) && skip)
+				return Ternary_False;
 
 			UInt8 manufacturer;
 			if (stream.Read(&manufacturer, 1) == 1)