From: Mikko Rasa Date: Wed, 2 Oct 2013 17:43:24 +0000 (+0300) Subject: Deal with extensions that are not present at compile time X-Git-Url: http://git.tdb.fi/?a=commitdiff_plain;h=9705e1a5f1b6065c2cfa0cc987d65b332fdde5ce;p=libs%2Fgl.git Deal with extensions that are not present at compile time --- diff --git a/scripts/extgen.py b/scripts/extgen.py index 0bf6bd67..4333cf37 100755 --- a/scripts/extgen.py +++ b/scripts/extgen.py @@ -4,6 +4,7 @@ import sys import os import xml.dom import xml.dom.minidom +import itertools ### Command line processing ### @@ -53,17 +54,30 @@ if not out_base: ### XML file parsing ### -class Function: - def __init__(self, name): +class Thing: + FUNCTION = 1 + ENUM = 2 + + def __init__(self, name, kind): self.name = name - self.typedef = None + self.kind = kind self.version = None self.extension = None - self.vectorequiv = None self.aliases = [] - self.extfunc = None + self.source = None + +class Function(Thing): + def __init__(self, name): + Thing.__init__(self, name, Thing.FUNCTION) + self.typedef = None + self.vectorequiv = None + +class Enum(Thing): + def __init__(self, name): + Thing.__init__(self, name, Thing.ENUM) + self.value = 0 -funcs = {} +things = {} def get_nested_elements(elem, path): if '/' in path: @@ -90,10 +104,10 @@ def parse_file(fn): commands = get_nested_elements(root, "commands/command") for cmd in commands: name = get_text_contents(get_nested_elements(cmd, "proto/name")[0]) - func = funcs.get(name) + func = things.get(name) if not func: func = Function(name) - funcs[name] = func + things[name] = func aliases = cmd.getElementsByTagName("alias") for a in aliases: @@ -103,6 +117,16 @@ def parse_file(fn): if vec: func.vectorequiv = vec[0].getAttribute("name") + 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 + + enum.value = int(en.getAttribute("value"), 16) + features = root.getElementsByTagName("feature") for feat in features: api = feat.getAttribute("api") @@ -110,18 +134,20 @@ def parse_file(fn): version = feat.getAttribute("number") commands = get_nested_elements(feat, "require/command") - for c in commands: - name = c.getAttribute("name") - func = funcs.get(name) - if func: - func.version = version + 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") - for c in commands: - name = c.getAttribute("name") - if name in funcs: - del funcs[name] + 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] extensions = get_nested_elements(root, "extensions/extension") for ext in extensions: @@ -131,53 +157,67 @@ def parse_file(fn): supported = ext.getAttribute("supported").split('|') if "gl" in supported: commands = get_nested_elements(ext, "require/command") - for c in commands: - name = c.getAttribute("name") - func = funcs.get(name) - if func: - func.extension = ext_name + 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_file("gl.xml") parse_file("gl.fixes.xml") ### Additional processing ### -# Create references from core functions to their extension counterparts -for f in funcs.itervalues(): - if f.extension==ext or f.extension in secondary: - for a in f.aliases: - aliasfunc = funcs.get(a) - if aliasfunc: - aliasfunc.extfunc = f - -def is_relevant(f): - # Unpromoted extension functions are relevant - if f.extension==ext and not f.aliases: +# 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) + +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) + +# Create references from core things to their extension counterparts +for t in things.itervalues(): + if t.extension==ext or t.extension in secondary: + for a in t.aliases: + alias = things.get(a) + if alias: + alias.source = t + +def is_relevant(t): + # Unpromoted extension things are relevant + if t.extension==ext and not t.aliases: return True - # Core functions promoted from the extension are also relevant - if f.extfunc: - e = f.extfunc + # Core things promoted from the extension are also relevant + if t.source: + e = t.source if e.extension==ext or e.extension in secondary: return True return False -funcs = [f for f in funcs.itervalues() if is_relevant(f)] +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.sort(key=(lambda e: e.value)) -for f in funcs: +for t in itertools.chain(funcs, enums): if not ver: - ver = f.version + ver = t.version - # Functions in backport extensions don't acquire an extension suffix - if f.extension and not f.name.endswith(exttype): - backport_ext = f.extension + # Things in backport extensions don't acquire an extension suffix + if t.extension and not t.name.endswith(exttype): + backport_ext = t.extension - if f.extfunc: +for f in funcs: + if f.source: # Typedefs for early core functions are not available in all # implementations - f.typedef = "PFN%sPROC"%f.extfunc.name.upper() + f.typedef = "PFN%sPROC"%f.source.name.upper() else: f.typedef = "PFN%sPROC"%f.name.upper() @@ -198,10 +238,17 @@ namespace Msp { namespace GL { """) -if funcs: - out.write("\n") -for f in funcs: - out.write("extern %s %s;\n"%(f.typedef, f.name)) +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: + out.write("\n") + for e in enums: + out.write("#define %s 0x%04X\n"%(e.name, e.value)) + out.write("#endif\n\n") + for f in funcs: + out.write("extern %s %s;\n"%(f.typedef, f.name)) out.write("\nextern Extension %s;\n"%ext) @@ -226,6 +273,7 @@ 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)) if backport_ext: @@ -239,11 +287,12 @@ if ext!=backport_ext: out.write("\tif(is_supported(\"GL_%s\"))\n\t{\n"%(ext)) for f in funcs: n = f.name - if f.extfunc: - n = f.extfunc.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("\t\treturn Extension::EXTENSION;\n") out.write("\t}\n") +out.write("#endif\n") out.write("\treturn Extension::UNSUPPORTED;\n") out.write("}\n")