X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=scripts%2Fextgen.py;h=fbb66815ae1de93102485065bace98bde781b05f;hb=67538c60b8baa6816b8ae2d343ae62d881e6c58d;hp=eef6475adbdad5506ad39068286e2efa03b3922a;hpb=710418caebcbcb9ed22bb828cb1dcd88d6b99aa1;p=libs%2Fgl.git

diff --git a/scripts/extgen.py b/scripts/extgen.py
index eef6475a..fbb66815 100755
--- a/scripts/extgen.py
+++ b/scripts/extgen.py
@@ -10,8 +10,8 @@ import itertools
 
 if len(sys.argv)<2:
 	print """Usage:
-  extgen.py <extension> [<core_version>] [<secondary> ...]
-  extgen.py <extfile> [<outfile>]
+  extgen.py [api] <extension> [<core_version>] [<secondary> ...]
+  extgen.py [api] <extfile> [<outfile>]
 
 Reads gl.xml and generates files to use <extension>.  Any promoted functions
 are exposed with their promoted names.  If <secondary> extensions are given,
@@ -23,34 +23,45 @@ absent, the extension's lowercased name is used.  Anything after the last dot
 in <outfile> is removed and replaced with cpp and h."""
 	sys.exit(0)
 
-ext = sys.argv[1]
+target_api = "gl"
+
+i = 1
+if sys.argv[i].startswith("gl"):
+	target_api = sys.argv[i]
+	i += 1
+
+target_ext = sys.argv[i]
 out_base = None
-if ext.endswith(".glext"):
-	fn = ext
-	ext = None
-	ver = None
+if target_ext.endswith(".glext"):
+	fn = target_ext
+	target_ext = None
+	core_version = None
 	secondary = []
 	for line in open(fn):
 		parts = line.split()
 		if parts[0]=="extension":
-			ext = parts[1]
+			target_ext = parts[1]
 		elif parts[0]=="core_version":
-			ver = parts[1]
+			if parts[1]==target_api:
+				core_version = parts[2]
 		elif parts[0]=="secondary":
 			secondary.append(parts[1])
-	if len(sys.argv)>=3:
-		out_base = os.path.splitext(sys.argv[2])[0]
+	if i+1<len(sys.argv):
+		out_base = os.path.splitext(sys.argv[i+1])[0]
 else:
-	secondary = sys.argv[2:]
-	ver = None
+	secondary = sys.argv[i+1:]
+	core_version = None
 	if secondary and secondary[0][0].isdigit():
-		ver = secondary.pop(0)
+		core_version = secondary.pop(0)
 
-exttype = ext.split('_')[0]
+ext_type = target_ext.split('_')[0]
 backport_ext = None
 
+if core_version:
+	core_version = map(int, core_version.split('.'))
+
 if not out_base:
-	out_base = ext.lower()
+	out_base = target_ext.lower()
 
 ### XML file parsing ###
 
@@ -63,31 +74,49 @@ class Thing:
 		self.kind = kind
 		self.version = None
 		self.extension = None
+		self.supported_apis = {}
 		self.aliases = []
-		self.source = None
+		self.sources = []
 
 class Function(Thing):
 	def __init__(self, name):
 		Thing.__init__(self, name, Thing.FUNCTION)
+		self.return_type = "void"
+		self.params = []
 		self.typedef = None
-		self.vectorequiv = None
 
 class Enum(Thing):
 	def __init__(self, name):
 		Thing.__init__(self, name, Thing.ENUM)
 		self.value = 0
+		self.bitmask = (name.endswith("_BIT") or "_BIT_" in name)
 
+class Extension:
+	def __init__(self, name):
+		self.name = name
+		self.supported_apis = []
+		self.ext_type = name[0:name.find('_')]
+
+extensions = {}
 things = {}
 
 def get_nested_elements(elem, path):
+	childElements = [c for c in elem.childNodes if c.nodeType==xml.dom.Node.ELEMENT_NODE]
 	if '/' in path:
 		head, tail = path.split('/', 1)
 		result = []
-		for e in elem.getElementsByTagName(head):
-			result += get_nested_elements(e, tail)
+		for c in childElements:
+			if c.tagName==head:
+				result += get_nested_elements(c, tail)
 		return result
 	else:
-		return elem.getElementsByTagName(path)
+		return [c for c in childElements if c.tagName==path]
+
+def get_first_child(elem, tag):
+	for c in elem.childNodes:
+		if c.nodeType==xml.dom.Node.ELEMENT_NODE and c.tagName==tag:
+			return c
+	return None
 
 def get_text_contents(node):
 	result = ""
@@ -98,137 +127,225 @@ def get_text_contents(node):
 			result += get_text_contents(c)
 	return result
 
+def parse_command(cmd):
+	proto = get_first_child(cmd, "proto")
+	name = get_text_contents(get_first_child(proto, "name"))
+	func = things.get(name)
+	if not func:
+		func = Function(name)
+		things[name] = func
+
+	aliases = get_nested_elements(cmd, "alias")
+	func.aliases = [a.getAttribute("name") for a in aliases]
+
+	ptype = get_first_child(proto, "ptype")
+	if ptype:
+		func.return_type = get_text_contents(ptype)
+	else:
+		for c in proto.childNodes:
+			if c.nodeType==xml.dom.Node.TEXT_NODE and c.data.strip():
+				func.return_type = c.data.strip()
+				break
+
+	params = get_nested_elements(cmd, "param")
+	func.params = map(get_text_contents, params)
+
+def parse_enum(en):
+	name = en.getAttribute("name")
+	enum = things.get(name)
+	if not enum:
+		enum = Enum(name)
+		things[name] = enum
+
+	enum.value = int(en.getAttribute("value"), 16)
+
+def parse_feature(feat):
+	api = feat.getAttribute("api")
+	version = feat.getAttribute("number")
+	if version:
+		version = map(int, version.split('.'))
+	else:
+		version = None
+
+	requires = get_nested_elements(feat, "require")
+	for req in requires:
+		commands = get_nested_elements(req, "command")
+		enums = get_nested_elements(req, "enum")
+		for t in itertools.chain(commands, enums):
+			name = t.getAttribute("name")
+			thing = things.get(name)
+			if thing:
+				thing.supported_apis.setdefault(api, version)
+
+	if not api or api==target_api:
+		removes = get_nested_elements(feat, "remove")
+		for rem in removes:
+			profile = rem.getAttribute("profile")
+			commands = get_nested_elements(rem, "command")
+			enums = get_nested_elements(rem, "enum")
+
+			for t in itertools.chain(commands, enums):
+				name = t.getAttribute("name")
+				if profile!="core" and name in things:
+					del things[name]
+
+def parse_extension(ext):
+	ext_name = ext.getAttribute("name")
+	if ext_name.startswith("GL_"):
+		ext_name = ext_name[3:]
+
+	supported = ext.getAttribute("supported").split('|')
+	if target_api not in supported and ext_name!=target_ext:
+		return
+
+	extension = extensions.get(ext_name)
+	if not extension:
+		extension = Extension(ext_name)
+		extensions[ext_name] = extension
+
+	extension.supported_apis = supported
+
+	requires = get_nested_elements(ext, "require")
+	for req in requires:
+		api = req.getAttribute("api")
+		if api:
+			supported = [api]
+		else:
+			supported = extension.supported_apis
+
+		commands = get_nested_elements(req, "command")
+		enums = get_nested_elements(req, "enum")
+		for t in itertools.chain(commands, enums):
+			name = t.getAttribute("name")
+			thing = things.get(name)
+			if thing:
+				if thing.extension and extension.name!=target_ext:
+					if thing.extension.ext_type=="ARB" or thing.extension.name==target_ext:
+						continue
+					if thing.extension.ext_type=="EXT" and extension.ext_type!="ARB":
+						continue
+
+				thing.extension = extension
+				for a in supported:
+					thing.supported_apis.setdefault(a, "ext")
+
 def parse_file(fn):
 	doc = xml.dom.minidom.parse(fn)
 	root = doc.documentElement
+
 	commands = get_nested_elements(root, "commands/command")
 	for cmd in commands:
-		name = get_text_contents(get_nested_elements(cmd, "proto/name")[0])
-		func = things.get(name)
-		if not func:
-			func = Function(name)
-			things[name] = func
-
-		aliases = cmd.getElementsByTagName("alias")
-		for a in aliases:
-			func.aliases.append(a.getAttribute("name"))
-
-		vec = cmd.getElementsByTagName("vecequiv")
-		if vec:
-			func.vectorequiv = vec[0].getAttribute("name")
+		parse_command(cmd)
 
 	enums = get_nested_elements(root, "enums/enum")
 	for en in enums:
-		name = en.getAttribute("name")
-		enum = things.get(name)
-		if not enum:
-			enum = Enum(name)
-			things[name] = enum
+		parse_enum(en)
 
-		enum.value = int(en.getAttribute("value"), 16)
-
-	features = root.getElementsByTagName("feature")
+	features = get_nested_elements(root, "feature")
 	for feat in features:
-		api = feat.getAttribute("api")
-		if api=="gl":
-			version = feat.getAttribute("number")
-
-			commands = get_nested_elements(feat, "require/command")
-			enums = get_nested_elements(feat, "require/enum")
-			for t in itertools.chain(commands, enums):
-				name = t.getAttribute("name")
-				thing = things.get(name)
-				if thing:
-					thing.version = version
-
-			if feat.getAttribute("name")=="MSPGL_REMOVE":
-				commands = get_nested_elements(feat, "remove/command")
-				enums = get_nested_elements(feat, "require/enum")
-				for t in itertools.chain(commands, enums):
-					name = t.getAttribute("name")
-					if name in things:
-						del things[name]
+		parse_feature(feat)
 
 	extensions = get_nested_elements(root, "extensions/extension")
 	for ext in extensions:
-		ext_name = ext.getAttribute("name")
-		if ext_name.startswith("GL_"):
-			ext_name = ext_name[3:]
-		supported = ext.getAttribute("supported").split('|')
-		if "gl" in supported:
-			commands = get_nested_elements(ext, "require/command")
-			enums = get_nested_elements(ext, "require/enum")
-			for t in itertools.chain(commands, enums):
-				name = t.getAttribute("name")
-				thing = things.get(name)
-				if thing:
-					thing.extension = ext_name
+		parse_extension(ext)
 
 parse_file("gl.xml")
 parse_file("gl.fixes.xml")
 
 ### Additional processing ###
 
+if target_ext in extensions:
+	target_ext = extensions[target_ext]
+else:
+	print "Extension %s not found"%target_ext
+	sys.exit(1)
+
 # Find aliases for enums
 enums = [t for t in things.itervalues() if t.kind==Thing.ENUM]
-core_enums_by_value = dict((e.value, e) for e in enums if e.version)
+core_enums = [e for e in enums if any(v!="ext" for v in e.supported_apis.itervalues())]
+core_enums_by_value = dict((e.value, None) for e in core_enums)
+
+def get_key_api(things):
+	common_apis = set(target_ext.supported_apis)
+	for t in things:
+		common_apis.intersection_update(t.supported_apis.keys())
+	if common_apis:
+		return common_apis.pop()
+	else:
+		return target_api
 
 for e in enums:
-	if e.kind==t.ENUM and e.extension:
-		ce = core_enums_by_value.get(e.value)
-		if ce and ce!=e:
-			e.aliases.append(ce.name)
+	if all(v=="ext" for v in e.supported_apis.values()) and e.value in core_enums_by_value:
+		if core_enums_by_value[e.value] is None:
+			candidates = [ce for ce in core_enums if ce.value==e.value]
+			key_api = get_key_api(candidates)
+			core_enums_by_value[e.value] = list(sorted(candidates, key=(lambda x: x.supported_apis.get(key_api, "ext"))))
+		for ce in core_enums_by_value[e.value]:
+			if ce.bitmask==e.bitmask:
+				e.aliases.append(ce.name)
+				break
 
 # Create references from core things to their extension counterparts
 for t in things.itervalues():
-	if t.extension==ext or t.extension in secondary:
+	if t.extension:
 		for a in t.aliases:
 			alias = things.get(a)
 			if alias:
-				alias.source = t
+				if target_api in t.supported_apis:
+					alias.sources.insert(0, t)
+				else:
+					alias.sources.append(t)
 
+# Find the things we want to include in this extension
 def is_relevant(t):
 	# Unpromoted extension things are relevant
-	if t.extension==ext and not t.aliases:
+	if t.extension and t.extension==target_ext and not t.aliases:
 		return True
 
 	# Core things promoted from the extension are also relevant
-	if t.source:
-		e = t.source
-		if e.extension==ext or e.extension in secondary:
+	for s in t.sources:
+		if s.extension==target_ext or s.extension.name in secondary:
 			return True
 
 	return False
 
 funcs = [t for t in things.itervalues() if t.kind==Thing.FUNCTION and is_relevant(t)]
 funcs.sort(key=(lambda f: f.name))
-enums = [e for e in enums if is_relevant(e)]
+enums = filter(is_relevant, enums)
 enums.sort(key=(lambda e: e.value))
 
+# Some final preparations for creating the files
 for t in itertools.chain(funcs, enums):
-	if not ver:
-		ver = t.version
+	if target_api in t.supported_apis and t.supported_apis[target_api]!="ext":
+		t.version = t.supported_apis[target_api]
+	if not core_version:
+		core_version = t.version
 
 	# Things in backport extensions don't acquire an extension suffix
-	if t.extension and not t.name.endswith(exttype):
+	if t.extension and not t.name.endswith(ext_type) and target_api in t.supported_apis:
 		backport_ext = t.extension
 
 for f in funcs:
-	if f.source:
-		# Typedefs for early core functions are not available in all
-		# implementations
-		f.typedef = "PFN%sPROC"%f.source.name.upper()
-	else:
-		f.typedef = "PFN%sPROC"%f.name.upper()
+	f.typedef = "FPtr_%s"%f.name
 
-if ver:
-	ver = map(int, ver.split('.'))
+if target_api in target_ext.supported_apis:
+	source_ext = target_ext
+else:
+	candidates = {}
+	for t in itertools.chain(funcs, enums):
+		for s in t.sources:
+			if target_api in s.supported_apis:
+				candidates[s.extension.name] = candidates.get(s.extension.name, 0)+1
+	if candidates:
+		source_ext = extensions[max(candidates.iteritems(), key=(lambda x: x[1]))[0]]
+	else:
+		source_ext = None
 
 ### Output ###
 
 out = file(out_base+".h", "w")
-out.write("#ifndef MSP_GL_%s_\n"%ext.upper())
-out.write("#define MSP_GL_%s_\n"%ext.upper())
+out.write("#ifndef MSP_GL_%s_\n"%target_ext.name.upper())
+out.write("#define MSP_GL_%s_\n"%target_ext.name.upper())
 
 out.write("""
 #include <msp/gl/extension.h>
@@ -236,26 +353,42 @@ out.write("""
 
 namespace Msp {
 namespace GL {
+
 """)
 
 if funcs or enums:
-	out.write("\n#ifndef GL_%s\n"%ext)
-	for f in funcs:
-		out.write("typedef int (*%s)(...);\n"%f.typedef)
-	if funcs and enums:
+	if funcs:
+		for f in funcs:
+			out.write("typedef %s (*%s)(%s);\n"%(f.return_type, f.typedef, ", ".join(f.params)))
 		out.write("\n")
-	for e in enums:
-		out.write("#define %s 0x%04X\n"%(e.name, e.value))
-	out.write("#endif\n\n")
 
-	# Apple's OpenGL implementation doesn't have a GetProcAddress function; link
-	# directly to the OpenGL library
-	out.write("\n#if !defined(__APPLE__) || !defined(GL_%s)\n"%ext)
+	if enums:
+		api_prefix = "GL"
+		if target_api=="gles2":
+			api_prefix = "GL_ES"
+
+		enums_by_category = {}
+		for e in enums:
+			cat = None
+			if e.version:
+				cat = api_prefix+"_VERSION_"+"_".join(map(str, e.version))
+			elif e.extension:
+				cat = "GL_"+e.extension.name
+			enums_by_category.setdefault(cat, []).append(e)
+
+		for cat in sorted(enums_by_category.keys()):
+			if cat:
+				out.write("#ifndef %s\n"%cat)
+			for e in enums_by_category[cat]:
+				out.write("#define %s 0x%04X\n"%(e.name, e.value))
+			if cat:
+				out.write("#endif\n")
+			out.write("\n")
+
 	for f in funcs:
 		out.write("extern %s %s;\n"%(f.typedef, f.name))
-	out.write("#endif\n")
 
-out.write("\nextern Extension %s;\n"%ext)
+out.write("extern Extension %s;\n"%target_ext.name)
 
 out.write("""
 } // namespace GL
@@ -265,50 +398,50 @@ out.write("""
 """)
 
 out = file(out_base+".cpp", "w")
-out.write("#include \"%s.h\"\n"%ext.lower())
+out.write("#include \"%s.h\"\n"%target_ext.name.lower())
 
+if funcs:
+	out.write("""
+#ifdef __APPLE__
+#define GET_PROC_ADDRESS(x) ::x
+#else
+#define GET_PROC_ADDRESS(x) get_proc_address(#x)
+#endif
+""")
 out.write("""
 namespace Msp {
 namespace GL {
+
 """)
 
-if funcs:
-	out.write("\n#if !defined(__APPLE__) || !defined(GL_%s)\n"%ext)
-	for f in funcs:
-		out.write("%s %s = 0;\n"%(f.typedef, f.name))
-	out.write("\n#endif\n")
+for f in funcs:
+	out.write("%s %s = 0;\n"%(f.typedef, f.name))
 
-out.write("\nExtension::SupportLevel init_%s()\n{\n"%ext.lower())
-out.write("#ifdef GL_%s\n"%ext)
-if ver:
-	out.write("\tif(is_version_at_least(%d, %d)"%tuple(ver))
+out.write("\nExtension::SupportLevel init_%s()\n{\n"%target_ext.name.lower())
+if core_version:
+	out.write("\tif(is_version_at_least(%d, %d)"%tuple(core_version))
 	if backport_ext:
-		out.write(" || is_supported(\"GL_%s\")"%backport_ext)
+		out.write(" || is_supported(\"GL_%s\")"%backport_ext.name)
 	out.write(")\n\t{\n")
-	if funcs:
-		out.write("#ifndef __APPLE__\n")
-		for f in funcs:
-			out.write("\t\t%s = reinterpret_cast<%s>(get_proc_address(\"%s\"));\n"%(f.name, f.typedef, f.name))
-		out.write("#endif\n")
+	for f in funcs:
+		if f.version or 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")
-if ext!=backport_ext:
-	out.write("\tif(is_supported(\"GL_%s\"))\n\t{\n"%(ext))
-	if funcs:
-		out.write("#ifndef __APPLE__\n")
-		for f in funcs:
-			n = f.name
-			if f.source:
-				n = f.source.name
-			out.write("\t\t%s = reinterpret_cast<%s>(get_proc_address(\"%s\"));\n"%(f.name, f.typedef, n))
-		out.write("#endif\n")
+if source_ext and source_ext!=backport_ext:
+	out.write("\tif(is_supported(\"GL_%s\"))\n\t{\n"%(source_ext.name))
+	for f in funcs:
+		s = f
+		if f.sources:
+			s = f.sources[0]
+		if s.version or 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")
-out.write("#endif\n")
 out.write("\treturn Extension::UNSUPPORTED;\n")
 out.write("}\n")
 
-out.write("\nExtension %s(\"GL_%s\", init_%s);\n"%(ext, ext, ext.lower()))
+out.write("\nExtension %s(\"GL_%s\", init_%s);\n"%(target_ext.name, target_ext.name, target_ext.name.lower()))
 
 out.write("""
 } // namespace GL