X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fprogramcompiler.cpp;h=c35fa275c2b1bbadbcfbfb8f113cf68d165d4a8a;hp=fd27839da25e1f7cb377a7fdf46079bfb1e862f3;hb=6dc2da27f0831d4172fcfeba4900616fd6c844b8;hpb=f02b9bf0834d2a9422cfd812159352b428b46bb6

diff --git a/source/programcompiler.cpp b/source/programcompiler.cpp
index fd27839d..c35fa275 100644
--- a/source/programcompiler.cpp
+++ b/source/programcompiler.cpp
@@ -122,6 +122,8 @@ void ProgramCompiler::process()
 		else
 			++i;
 	}
+	for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
+		finalize(*i);
 }
 
 void ProgramCompiler::import(const string &name)
@@ -185,6 +187,14 @@ bool ProgramCompiler::optimize(Stage &stage)
 	return !unused.empty();
 }
 
+void ProgramCompiler::finalize(Stage &stage)
+{
+	if(get_gl_api()==OPENGL_ES2)
+		apply<DefaultPrecisionGenerator>(stage);
+	else
+		apply<PrecisionRemover>(stage);
+}
+
 void ProgramCompiler::inject_block(Block &target, const Block &source)
 {
 	list<RefPtr<Node> >::iterator insert_point = target.body.begin();
@@ -220,6 +230,38 @@ void ProgramCompiler::Visitor::apply(Stage &s)
 }
 
 
+ProgramCompiler::BlockModifier::BlockModifier():
+	remove_node(false)
+{ }
+
+void ProgramCompiler::BlockModifier::flatten_block(Block &block)
+{
+	insert_nodes.insert(insert_nodes.end(), block.body.begin(), block.body.end());
+	remove_node = true;
+}
+
+void ProgramCompiler::BlockModifier::apply_and_increment(Block &block, list<RefPtr<Node> >::iterator &i)
+{
+	block.body.insert(i, insert_nodes.begin(), insert_nodes.end());
+	insert_nodes.clear();
+
+	if(remove_node)
+		block.body.erase(i++);
+	else
+		++i;
+	remove_node = false;
+}
+
+void ProgramCompiler::BlockModifier::visit(Block &block)
+{
+	for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
+	{
+		(*i)->visit(*this);
+		apply_and_increment(block, i);
+	}
+}
+
+
 ProgramCompiler::Formatter::Formatter():
 	indent(0),
 	parameter_list(false),
@@ -228,9 +270,17 @@ ProgramCompiler::Formatter::Formatter():
 
 void ProgramCompiler::Formatter::apply(ProgramSyntax::Stage &s)
 {
+	GLApi api = get_gl_api();
 	const Version &ver = s.required_version;
-	if(ver.major)
-		formatted += format("#version %d%d\n", ver.major, ver.minor);
+
+	if(ver)
+	{
+		formatted += format("#version %d%02d", ver.major, ver.minor);
+		if(api==OPENGL_ES2 && ver>=Version(3, 0))
+			formatted += " es";
+		formatted += '\n';
+	}
+
 	Visitor::apply(s);
 }
 
@@ -329,6 +379,11 @@ void ProgramCompiler::Formatter::visit(Import &import)
 	formatted += format("import %s;", import.module);
 }
 
+void ProgramCompiler::Formatter::visit(Precision &prec)
+{
+	formatted += format("precision %s %s;", prec.precision, prec.type);
+}
+
 void ProgramCompiler::Formatter::visit(Layout &layout)
 {
 	formatted += "layout(";
@@ -379,6 +434,8 @@ void ProgramCompiler::Formatter::visit(VariableDeclaration &var)
 		}
 		formatted += format("%s ", interface);
 	}
+	if(!var.precision.empty())
+		formatted += format("%s ", var.precision);
 	formatted += format("%s %s", var.type, var.name);
 	if(var.array)
 	{
@@ -471,8 +528,7 @@ void ProgramCompiler::Formatter::visit(Jump &jump)
 
 
 ProgramCompiler::DeclarationCombiner::DeclarationCombiner():
-	toplevel(true),
-	remove_node(false)
+	toplevel(true)
 { }
 
 void ProgramCompiler::DeclarationCombiner::visit(Block &block)
@@ -481,15 +537,7 @@ void ProgramCompiler::DeclarationCombiner::visit(Block &block)
 		return;
 
 	SetForScope<bool> set(toplevel, false);
-	for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
-	{
-		remove_node = false;
-		(*i)->visit(*this);
-		if(remove_node)
-			block.body.erase(i++);
-		else
-			++i;
-	}
+	BlockModifier::visit(block);
 }
 
 void ProgramCompiler::DeclarationCombiner::visit(FunctionDeclaration &func)
@@ -689,38 +737,6 @@ void ProgramCompiler::FunctionResolver::visit(FunctionDeclaration &func)
 }
 
 
-ProgramCompiler::BlockModifier::BlockModifier():
-	remove_node(false)
-{ }
-
-void ProgramCompiler::BlockModifier::flatten_block(Block &block)
-{
-	insert_nodes.insert(insert_nodes.end(), block.body.begin(), block.body.end());
-	remove_node = true;
-}
-
-void ProgramCompiler::BlockModifier::apply_and_increment(Block &block, list<RefPtr<Node> >::iterator &i)
-{
-	block.body.insert(i, insert_nodes.begin(), insert_nodes.end());
-	insert_nodes.clear();
-
-	if(remove_node)
-		block.body.erase(i++);
-	else
-		++i;
-	remove_node = false;
-}
-
-void ProgramCompiler::BlockModifier::visit(Block &block)
-{
-	for(list<RefPtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
-	{
-		(*i)->visit(*this);
-		apply_and_increment(block, i);
-	}
-}
-
-
 ProgramCompiler::InterfaceGenerator::InterfaceGenerator():
 	scope_level(0)
 { }
@@ -1493,17 +1509,78 @@ void ProgramCompiler::NodeRemover::visit(VariableDeclaration &var)
 }
 
 
+void ProgramCompiler::PrecisionRemover::visit(Precision &)
+{
+	remove_node = true;
+}
+
+void ProgramCompiler::PrecisionRemover::visit(VariableDeclaration &var)
+{
+	var.precision.clear();
+}
+
+
+ProgramCompiler::DefaultPrecisionGenerator::DefaultPrecisionGenerator():
+	toplevel(true)
+{ }
+
+void ProgramCompiler::DefaultPrecisionGenerator::visit(Block &block)
+{
+	if(toplevel)
+	{
+		SetForScope<bool> set(toplevel, false);
+		BlockModifier::visit(block);
+	}
+	else
+		Visitor::visit(block);
+}
+
+void ProgramCompiler::DefaultPrecisionGenerator::visit(Precision &prec)
+{
+	have_default.insert(prec.type);
+}
+
+void ProgramCompiler::DefaultPrecisionGenerator::visit(VariableDeclaration &var)
+{
+	if(var.type_declaration)
+		return;
+
+	string type = var.type;
+	if(!type.compare(0, 3, "vec") || !type.compare(0, 3, "mat"))
+		type = "float";
+	else if(!type.compare(0, 3, "ivec") || type=="uint")
+		type = "int";
+
+	if(!have_default.count(type))
+	{
+		Precision *prec = new Precision;
+		if(!type.compare(0, 7, "sampler"))
+			prec->precision = "lowp";
+		else if(stage->type==FRAGMENT)
+			prec->precision = "mediump";
+		else
+			prec->precision = "highp";
+		prec->type = type;
+		insert_nodes.push_back(prec);
+
+		have_default.insert(type);
+	}
+}
+
+
 ProgramCompiler::LegacyConverter::LegacyConverter():
+	target_api(get_gl_api()),
 	target_version(get_glsl_version()),
 	frag_out(0)
 { }
 
 ProgramCompiler::LegacyConverter::LegacyConverter(const Version &v):
+	target_api(get_gl_api()),
 	target_version(v),
 	frag_out(0)
 { }
 
-bool ProgramCompiler::LegacyConverter::check_version(const Version &feature_version)
+bool ProgramCompiler::LegacyConverter::check_version(const Version &feature_version) const
 {
 	if(target_version<feature_version)
 		return false;
@@ -1513,9 +1590,17 @@ bool ProgramCompiler::LegacyConverter::check_version(const Version &feature_vers
 	return true;
 }
 
+bool ProgramCompiler::LegacyConverter::supports_unified_interface_syntax() const
+{
+	if(target_api==OPENGL_ES2)
+		return check_version(Version(3, 0));
+	else
+		return check_version(Version(1, 30));
+}
+
 void ProgramCompiler::LegacyConverter::visit(VariableReference &var)
 {
-	if(var.declaration==frag_out && !check_version(Version(1, 30)))
+	if(var.declaration==frag_out && !supports_unified_interface_syntax())
 	{
 		var.name = "gl_FragColor";
 		var.declaration = 0;
@@ -1530,13 +1615,21 @@ void ProgramCompiler::LegacyConverter::visit(VariableReference &var)
 void ProgramCompiler::LegacyConverter::visit(Assignment &assign)
 {
 	TraversingVisitor::visit(assign);
-	if(assign.target_declaration==frag_out && !check_version(Version(1, 30)))
+	if(assign.target_declaration==frag_out && !supports_unified_interface_syntax())
 		assign.target_declaration = 0;
 }
 
+bool ProgramCompiler::LegacyConverter::supports_unified_sampling_functions() const
+{
+	if(target_api==OPENGL_ES2)
+		return check_version(Version(3, 0));
+	else
+		return check_version(Version(1, 30));
+}
+
 void ProgramCompiler::LegacyConverter::visit(FunctionCall &call)
 {
-	if(call.name=="texture" && !call.declaration && !check_version(Version(1, 30)))
+	if(call.name=="texture" && !call.declaration && !supports_unified_sampling_functions())
 	{
 		vector<RefPtr<Expression> >::iterator i = call.arguments.begin();
 		if(i!=call.arguments.end())
@@ -1561,9 +1654,17 @@ void ProgramCompiler::LegacyConverter::visit(FunctionCall &call)
 		TraversingVisitor::visit(call);
 }
 
+bool ProgramCompiler::LegacyConverter::supports_interface_layouts() const
+{
+	if(target_api==OPENGL_ES2)
+		return check_version(Version(3, 0));
+	else
+		return check_version(Version(3, 30));
+}
+
 void ProgramCompiler::LegacyConverter::visit(VariableDeclaration &var)
 {
-	if(var.layout && !check_version(Version(3, 30)))
+	if(var.layout && !supports_interface_layouts())
 	{
 		vector<Layout::Qualifier>::iterator i;
 		for(i=var.layout->qualifiers.begin(); (i!=var.layout->qualifiers.end() && i->identifier!="location"); ++i) ;
@@ -1586,7 +1687,7 @@ void ProgramCompiler::LegacyConverter::visit(VariableDeclaration &var)
 		}
 	}
 
-	if((var.interface=="in" || var.interface=="out") && !check_version(Version(1, 30)))
+	if((var.interface=="in" || var.interface=="out") && !supports_unified_interface_syntax())
 	{
 		if(stage->type==FRAGMENT && var.interface=="out")
 		{
@@ -1598,9 +1699,22 @@ void ProgramCompiler::LegacyConverter::visit(VariableDeclaration &var)
 	TraversingVisitor::visit(var);
 }
 
+bool ProgramCompiler::LegacyConverter::supports_interface_blocks(const string &iface) const
+{
+	if(target_api==OPENGL_ES2)
+	{
+		if(iface=="uniform")
+			return check_version(Version(3, 0));
+		else
+			return check_version(Version(3, 20));
+	}
+	else
+		return check_version(Version(1, 50));
+}
+
 void ProgramCompiler::LegacyConverter::visit(InterfaceBlock &iface)
 {
-	if(!check_version(Version(1, 50)))
+	if(!supports_interface_blocks(iface.interface))
 		flatten_block(iface.members);
 }