Automatically backport shaders to earlier GLSL versions if necessary

[libs/gl.git] / source / programcompiler.h

diff --git a/source/programcompiler.h b/source/programcompiler.h
index 8681d3638a032cabd389879922fe7378c4a45a76..8ae22901e89dcbfb19bf08fc2a25929aaddf9188 100644 (file)
--- a/source/programcompiler.h
+++ b/source/programcompiler.h
@@ -38,6 +38,7 @@ private:
 
                Formatter();
 
+               virtual void apply(ProgramSyntax::Stage &);
                const std::string &get_result() const { return formatted; }
                virtual void visit(ProgramSyntax::Block &);
                virtual void visit(ProgramSyntax::Literal &);
@@ -116,14 +117,24 @@ private:
                virtual void visit(ProgramSyntax::FunctionDeclaration &);
        };
 
-       struct InterfaceGenerator: Visitor
+       struct BlockModifier: Visitor
+       {
+               bool remove_node;
+               std::list<ProgramSyntax::Node *> insert_nodes;
+
+               BlockModifier();
+
+               void flatten_block(ProgramSyntax::Block &);
+               void apply_and_increment(ProgramSyntax::Block &, std::list<ProgramSyntax::NodePtr<ProgramSyntax::Node> >::iterator &);
+               virtual void visit(ProgramSyntax::Block &);
+       };
+
+       struct InterfaceGenerator: BlockModifier
        {
                std::string in_prefix;
                std::string out_prefix;
                unsigned scope_level;
                std::map<std::string, ProgramSyntax::VariableDeclaration *> iface_declarations;
-               bool remove_node;
-               std::list<ProgramSyntax::Node *> insert_nodes;
 
                InterfaceGenerator();
 
@@ -161,12 +172,10 @@ private:
                virtual void visit(ProgramSyntax::BinaryExpression &);
        };
 
-       struct ConstantConditionEliminator: Visitor
+       struct ConstantConditionEliminator: BlockModifier
        {
                unsigned scope_level;
                ExpressionEvaluator::ValueMap variable_values;
-               bool remove_node;
-               ProgramSyntax::Block *replacement_block;
 
                ConstantConditionEliminator();
 
@@ -238,6 +247,22 @@ private:
                virtual void visit(ProgramSyntax::VariableDeclaration &);
        };
 
+       struct LegacyConverter: BlockModifier
+       {
+               Version target_version;
+               std::string type;
+               std::string frag_out_name;
+
+               LegacyConverter();
+               LegacyConverter(const Version &);
+
+               bool check_version(const Version &);
+               virtual void visit(ProgramSyntax::VariableReference &);
+               virtual void visit(ProgramSyntax::FunctionCall &);
+               virtual void visit(ProgramSyntax::VariableDeclaration &);
+               virtual void visit(ProgramSyntax::InterfaceBlock &);
+       };
+
        Resources *resources;
        ProgramParser parser;
        ProgramSyntax::Module *module;