X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fprogramparser.cpp;h=16299d20cf157f8281fc2face34d55a21712eee1;hb=a29cc14162e911b36d18d1d1896216697c7dc0c1;hp=c6cdfd06246f1c14683919fcfec637b8adf85058;hpb=a36992487d018d8801ead6980b362b00a2f5f5c5;p=libs%2Fgl.git

diff --git a/source/programparser.cpp b/source/programparser.cpp
index c6cdfd06..16299d20 100644
--- a/source/programparser.cpp
+++ b/source/programparser.cpp
@@ -58,11 +58,20 @@ ProgramParser::Operator ProgramParser::operators[] =
 	{ { 0 }, 18, NO_OPERATOR, LEFT_TO_RIGHT }
 };
 
+ProgramParser::ProgramParser():
+	module(0)
+{ }
+
+ProgramParser::~ProgramParser()
+{
+	delete module;
+}
+
 Module &ProgramParser::parse(const string &s)
 {
 	source = s;
-	parse_source(main_module);
-	return main_module;
+	parse_source();
+	return *module;
 }
 
 Module &ProgramParser::parse(IO::Base &io)
@@ -74,35 +83,37 @@ Module &ProgramParser::parse(IO::Base &io)
 		unsigned len = io.read(buffer, sizeof(buffer));
 		source.append(buffer, len);
 	}
-	parse_source(main_module);
-	return main_module;
+	parse_source();
+	return *module;
 }
 
-void ProgramParser::parse_source(Module &module)
+void ProgramParser::parse_source()
 {
-	cur_module = &module;
+	delete module;
+	module = new Module;
+	cur_stage = &module->shared;
 	iter = source.begin();
-	Context *cur_context = &module.global_context;
 	while(1)
 	{
 		while(Node *statement = parse_global_declaration())
-			cur_context->content.body.push_back(statement);
-		cur_context->present = !cur_context->content.body.empty();
+			cur_stage->content.body.push_back(statement);
 
 		parse_token();
 		string token = parse_token();
 		if(token.empty())
 			break;
-		else if(token=="global")
-			cur_context = &module.global_context;
 		else if(token=="vertex")
-			cur_context = &module.vertex_context;
+			module->stages.push_back(VERTEX);
 		else if(token=="geometry")
-			cur_context = &module.geometry_context;
+			module->stages.push_back(GEOMETRY);
 		else if(token=="fragment")
-			cur_context = &module.fragment_context;
+			module->stages.push_back(FRAGMENT);
 		else
-			throw runtime_error(format("Parse error at '%s': expected context identifier", token));
+			throw runtime_error(format("Parse error at '%s': expected stage identifier", token));
+
+		if(cur_stage->type!=SHARED)
+			module->stages.back().previous = cur_stage;
+		cur_stage = &module->stages.back();
 
 		for(; (iter!=source.end() && *iter!='\n'); ++iter) ;
 	}
@@ -355,6 +366,8 @@ Node *ProgramParser::parse_statement()
 		return parse_conditional();
 	else if(token=="for")
 		return parse_iteration();
+	else if(token=="passthrough")
+		return parse_passthrough();
 	else if(token=="return")
 		return parse_return();
 	else if(is_qualifier(token) || is_type(token))
@@ -693,6 +706,20 @@ Iteration *ProgramParser::parse_iteration()
 	return loop.release();
 }
 
+Passthrough *ProgramParser::parse_passthrough()
+{
+	expect("passthrough");
+	RefPtr<Passthrough> pass = new Passthrough;
+	if(cur_stage->type==GEOMETRY)
+	{
+		expect("[");
+		pass->subscript = parse_expression();
+		expect("]");
+	}
+	expect(";");
+	return pass.release();
+}
+
 Return *ProgramParser::parse_return()
 {
 	expect("return");