Emit warnings if an extension can't be fully supported

diff --git a/scripts/extgen.py b/scripts/extgen.py
index fbb66815ae1de93102485065bace98bde781b05f..c5bc219a392e35db1d823a61df8dc3b927e28c88 100755 (executable)
--- a/scripts/extgen.py
+++ b/scripts/extgen.py
@@ -341,6 +341,33 @@ else:
        else:
                source_ext = None
 
+if funcs or enums:
+       any_supported = False
+       all_supported = True
+       for t in itertools.chain(funcs, enums):
+               if target_api in t.supported_apis:
+                       any_supported = True
+               else:
+                       all_supported = False
+
+       if not any_supported:
+               print "Warning: %s is not supported by the target API"%target_ext.name
+       elif not all_supported:
+               print "Warning: %s is only partially supported by the target API"%target_ext.name
+               unsupported = ""
+               label = "Warning: Unsupported tokens: "
+               for t in itertools.chain(funcs, enums):
+                       if target_api not in t.supported_apis:
+                               if unsupported and len(label)+len(unsupported)+2+len(t.name)>78:
+                                       print label+unsupported
+                                       label = " "*len(label)
+                                       unsupported = ""
+                               if unsupported:
+                                       unsupported += ", "
+                               unsupported += t.name
+               if unsupported:
+                       print label+unsupported
+
 ### Output ###
 
 out = file(out_base+".h", "w")
@@ -424,7 +451,7 @@ if core_version:
                out.write(" || is_supported(\"GL_%s\")"%backport_ext.name)
        out.write(")\n\t{\n")
        for f in funcs:
-               if f.version or target_api in f.supported_apis:
+               if target_api in f.supported_apis:
                        out.write("\t\t%s = reinterpret_cast<%s>(GET_PROC_ADDRESS(%s));\n"%(f.name, f.typedef, f.name))
        out.write("\t\treturn Extension::CORE;\n")
        out.write("\t}\n")
@@ -434,7 +461,7 @@ if source_ext and source_ext!=backport_ext:
                s = f
                if f.sources:
                        s = f.sources[0]
-               if s.version or target_api in s.supported_apis:
+               if target_api in s.supported_apis:
                        out.write("\t\t%s = reinterpret_cast<%s>(GET_PROC_ADDRESS(%s));\n"%(f.name, f.typedef, s.name))
        out.write("\t\treturn Extension::EXTENSION;\n")
        out.write("\t}\n")