Process existing inputs in passthrough

Vertex shader inputs are not linked to any outputs so they weren't being
recognized for passthrough.  Also, some inputs might have already been
declared either explicitly or implicitly so those declarations should be
preferred over creating new ones.

diff --git a/source/programcompiler.cpp b/source/programcompiler.cpp
index d518ef3aa5fb6d8fd93c8cace2cc71502f771eba..79031e41eeda0cc970162d3632c31eaadd253ae5 100644 (file)
--- a/source/programcompiler.cpp
+++ b/source/programcompiler.cpp
@@ -452,7 +452,7 @@ void ProgramCompiler::InterfaceGenerator::visit(Block &block)
 
                if(scope_level==1)
                {
-                       for(map<string, Node *>::iterator j=iface_declarations.begin(); j!=iface_declarations.end(); ++j)
+                       for(map<string, VariableDeclaration *>::iterator j=iface_declarations.begin(); j!=iface_declarations.end(); ++j)
                        {
                                list<NodePtr<Node> >::iterator k = block.body.insert(i, j->second);
                                (*k)->visit(*this);
@@ -478,22 +478,22 @@ string ProgramCompiler::InterfaceGenerator::change_prefix(const string &name, co
        return prefix+name.substr(offset);
 }
 
-bool ProgramCompiler::InterfaceGenerator::generate_interface(VariableDeclaration &out, const string &iface, const string &name)
+bool ProgramCompiler::InterfaceGenerator::generate_interface(VariableDeclaration &var, const string &iface, const string &name)
 {
        const map<string, VariableDeclaration *> &stage_vars = (iface=="in" ? stage->in_variables : stage->out_variables);
        if(stage_vars.count(name) || iface_declarations.count(name))
                return false;
 
        VariableDeclaration* iface_var = new VariableDeclaration;
-       iface_var->sampling = out.sampling;
+       iface_var->sampling = var.sampling;
        iface_var->interface = iface;
-       iface_var->type = out.type;
-       iface_var->type_declaration = out.type_declaration;
+       iface_var->type = var.type;
+       iface_var->type_declaration = var.type_declaration;
        iface_var->name = name;
-       iface_var->array = (out.array || (stage->type==GEOMETRY && iface=="in"));
-       iface_var->array_size = out.array_size;
+       iface_var->array = (var.array || (stage->type==GEOMETRY && iface=="in"));
+       iface_var->array_size = var.array_size;
        if(iface=="in")
-               iface_var->linked_declaration = &out;
+               iface_var->linked_declaration = &var;
        iface_declarations[name] = iface_var;
 
        return true;
@@ -564,31 +564,48 @@ void ProgramCompiler::InterfaceGenerator::visit(VariableDeclaration &var)
 
 void ProgramCompiler::InterfaceGenerator::visit(Passthrough &pass)
 {
+       vector<VariableDeclaration *> pass_vars;
+
+       for(map<string, VariableDeclaration *>::const_iterator i=stage->in_variables.begin(); i!=stage->in_variables.end(); ++i)
+               pass_vars.push_back(i->second);
+       for(map<string, VariableDeclaration *>::const_iterator i=iface_declarations.begin(); i!=iface_declarations.end(); ++i)
+               if(i->second->interface=="in")
+                       pass_vars.push_back(i->second);
+
        if(stage->previous)
        {
                const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
                for(map<string, VariableDeclaration *>::const_iterator i=prev_out.begin(); i!=prev_out.end(); ++i)
                {
-                       string out_name = change_prefix(i->second->name, out_prefix);
-                       generate_interface(*i->second, "in", i->second->name);
-                       generate_interface(*i->second, "out", out_name);
+                       bool linked = false;
+                       for(vector<VariableDeclaration *>::const_iterator j=pass_vars.begin(); (!linked && j!=pass_vars.end()); ++j)
+                               linked = ((*j)->linked_declaration==i->second);
 
-                       VariableReference *ref = new VariableReference;
-                       ref->name = i->first;
-                       if(pass.subscript)
-                       {
-                               BinaryExpression *subscript = new BinaryExpression;
-                               subscript->left = ref;
-                               subscript->oper = "[";
-                               subscript->right = pass.subscript;
-                               subscript->after = "]";
-                               insert_assignment(out_name, subscript);
-                       }
-                       else
-                               insert_assignment(out_name, ref);
+                       if(!linked && generate_interface(*i->second, "in", i->second->name))
+                               pass_vars.push_back(i->second);
                }
        }
 
+       for(vector<VariableDeclaration *>::const_iterator i=pass_vars.begin(); i!=pass_vars.end(); ++i)
+       {
+               string out_name = change_prefix((*i)->name, out_prefix);
+               generate_interface(**i, "out", out_name);
+
+               VariableReference *ref = new VariableReference;
+               ref->name = (*i)->name;
+               if(pass.subscript)
+               {
+                       BinaryExpression *subscript = new BinaryExpression;
+                       subscript->left = ref;
+                       subscript->oper = "[";
+                       subscript->right = pass.subscript;
+                       subscript->after = "]";
+                       insert_assignment(out_name, subscript);
+               }
+               else
+                       insert_assignment(out_name, ref);
+       }
+
        remove_node = true;
 }
 

diff --git a/source/programcompiler.h b/source/programcompiler.h
index db7aefe9ac3762a9234cd88d4b614dfc4c56ccd0..3b63c5e906bd257bdd568a6d89527e5fd2e01fb1 100644 (file)
--- a/source/programcompiler.h
+++ b/source/programcompiler.h
@@ -72,7 +72,7 @@ private:
                std::string in_prefix;
                std::string out_prefix;
                unsigned scope_level;
-               std::map<std::string, ProgramSyntax::Node *> iface_declarations;
+               std::map<std::string, ProgramSyntax::VariableDeclaration *> iface_declarations;
                bool remove_node;
                std::list<ProgramSyntax::Node *> insert_nodes;