X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fglsl%2Fcompatibility.h;h=212007131e80a3d0e37173364005d68f3b8d1166;hb=4fb346536bfefd612635a248f558b1f1471deae6;hp=a391aab0f20f7dbcb8bd0a4477434570437e7697;hpb=ab5f2e6f1ddd35f8f117460530d76c0ba0c9bc87;p=libs%2Fgl.git

diff --git a/source/glsl/compatibility.h b/source/glsl/compatibility.h
index a391aab0..21200713 100644
--- a/source/glsl/compatibility.h
+++ b/source/glsl/compatibility.h
@@ -8,6 +8,8 @@ namespace Msp {
 namespace GL {
 namespace SL {
 
+/** Generates default precision declarations if they are missing, to satisfy
+GLSL ES requirements. */
 class DefaultPrecisionGenerator: private TraversingVisitor
 {
 private:
@@ -24,9 +26,10 @@ private:
 	virtual void visit(Block &);
 	virtual void visit(Precision &);
 	virtual void visit(VariableDeclaration &);
-	using TraversingVisitor::visit;
 };
 
+/** Removes precision qualifiers from variable declarations, as well as
+default precision declarations. */
 class PrecisionRemover: private TraversingVisitor
 {
 private:
@@ -38,16 +41,16 @@ public:
 private:
 	virtual void visit(Precision &);
 	virtual void visit(VariableDeclaration &);
-	using TraversingVisitor::visit;
 };
 
+/** Converts structures of the syntax tree to match a particular set of
+features. */
 class LegacyConverter: private TraversingVisitor
 {
 private:
 	Stage *stage;
-	GLApi target_api;
-	Version target_version;
-	std::string type;
+	Features features;
+	std::string r_type;
 	VariableDeclaration *frag_out;
 	NodeList<Statement>::iterator uniform_insert_point;
 	std::set<Node *> nodes_to_remove;
@@ -55,12 +58,15 @@ private:
 public:
 	LegacyConverter();
 
-	virtual void apply(Stage &);
+	virtual void apply(Stage &, const Features &);
 
 private:
+	void unsupported(const std::string &);
+
 	virtual void visit(Block &);
 	bool check_version(const Version &) const;
-	bool check_extension(const Extension &) const;
+	bool check_extension(bool Features::*) const;
+	bool supports_stage(Stage::Type) const;
 	bool supports_unified_interface_syntax() const;
 	virtual void visit(VariableReference &);
 	virtual void visit(Assignment &);
@@ -72,7 +78,6 @@ private:
 	virtual void visit(VariableDeclaration &);
 	bool supports_interface_blocks(const std::string &) const;
 	virtual void visit(InterfaceBlock &);
-	using TraversingVisitor::visit;
 };
 
 } // namespace SL