More flexible system for customizing generated shaders

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

diff --git a/source/programbuilder.h b/source/programbuilder.h
index a6eb3fde8522dc097b19032c972cab399c078685..7840ecf00a2ef993a3590b6dd802f798b3d5878e 100644 (file)
--- a/source/programbuilder.h
+++ b/source/programbuilder.h
@@ -11,6 +11,13 @@ namespace GL {
 
 class Program;
 
+class invalid_variable_definition: public std::invalid_argument
+{
+public:
+       invalid_variable_definition(const std::string &w): std::invalid_argument(w) { }
+       virtual ~invalid_variable_definition() throw() { }
+};
+
 class ProgramBuilder
 {
 public:
@@ -29,14 +36,15 @@ public:
                bool normalmap;
                bool shadow;
                bool reflection;
-               bool transform;
-               bool colorify;
+               bool legacy;
+               std::string custom;
 
                StandardFeatures();
 
                std::string create_flags() const;
        };
 
+private:
        enum VariableScope
        {
                NO_SCOPE,
@@ -46,8 +54,7 @@ public:
                FRAGMENT
        };
 
-private:
-       struct StandardVariable
+       struct VariableDefinition
        {
                VariableScope scope;
                const char *name;
@@ -59,7 +66,7 @@ private:
        struct ShaderVariable
        {
                std::string name;
-               const StandardVariable *variable;
+               const VariableDefinition *variable;
                std::string resolved_name;
                bool fuzzy_space;
                std::string resolved_space;
@@ -70,12 +77,12 @@ private:
 
                ShaderVariable(const std::string &);
 
-               void resolve(const StandardVariable &);
+               void resolve(const VariableDefinition &);
                void resolve(ShaderVariable &);
                void resolve_space(const std::string &);
                void add_reference(ShaderVariable &);
                void update_reference(ShaderVariable &, ShaderVariable &);
-               void check_inline();
+               void check_inline(bool);
                bool is_referenced_from(VariableScope) const;
                std::string get_expression() const;
        };
@@ -88,10 +95,11 @@ private:
        };
 
        StandardFeatures features;
+       std::list<VariableDefinition> custom_variables;
        std::string feature_flags;
        bool optimize;
 
-       static const StandardVariable standard_variables[];
+       static const VariableDefinition standard_variables[];
 
 public:
        ProgramBuilder(const StandardFeatures &);