X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fglsl%2Freflect.h;h=d48fbec156506f31fda79fd86aa676b8257a128d;hp=a48ad53f8cfa9b960665af6a61cd66e2a475d686;hb=38712d8ecc57d043a2419ffbaeeb57f7a6586f14;hpb=70d9d2d28e5fe723c6b46894276e4c935f578e2d

diff --git a/source/glsl/reflect.h b/source/glsl/reflect.h
index a48ad53f..d48fbec1 100644
--- a/source/glsl/reflect.h
+++ b/source/glsl/reflect.h
@@ -7,15 +7,47 @@ namespace Msp {
 namespace GL {
 namespace SL {
 
+bool is_scalar(const BasicTypeDeclaration &);
+bool is_vector_or_matrix(const BasicTypeDeclaration &);
+BasicTypeDeclaration *get_element_type(BasicTypeDeclaration &);
+bool can_convert(const BasicTypeDeclaration &, const BasicTypeDeclaration &);
+
+/** Compares two types for equality.  Struct types are compared recursively. */
+class TypeComparer: private NodeVisitor
+{
+private:
+	Node *first = 0;
+	Node *second = 0;
+	unsigned first_tag = 0;
+	bool r_result = false;
+
+	static unsigned next_tag;
+
+public:
+	bool apply(TypeDeclaration &t1, TypeDeclaration &t2) { compare(t1, t2); return r_result; }
+
+private:
+	void compare(Node &, Node &);
+	template<typename T>
+	T *multi_visit(T &);
+	virtual void visit(Literal &);
+	virtual void visit(VariableReference &);
+	virtual void visit(UnaryExpression &);
+	virtual void visit(BinaryExpression &);
+	virtual void visit(TernaryExpression &);
+	virtual void visit(BasicTypeDeclaration &);
+	virtual void visit(ImageTypeDeclaration &);
+	virtual void visit(StructDeclaration &);
+	virtual void visit(VariableDeclaration &);
+};
+
 /** Determines the number of interface locations required by a variable. */
 class LocationCounter: private NodeVisitor
 {
 private:
-	unsigned r_count;
+	unsigned r_count = 0;
 
 public:
-	LocationCounter();
-
 	unsigned apply(VariableDeclaration &v) { v.visit(*this); return r_count; }
 
 private:
@@ -25,6 +57,53 @@ private:
 	virtual void visit(VariableDeclaration &);
 };
 
+/** Determines the size and alignment of a variable or a type, in bytes. */
+class MemoryRequirementsCalculator: private NodeVisitor
+{
+public:
+	struct Result
+	{
+		unsigned size;
+		unsigned alignment;
+		unsigned stride;
+
+		Result(unsigned s, unsigned a): size(s), alignment(a), stride(s+a-1-(s+a-1)%a) { }
+	};
+private:
+	unsigned r_size = 0;
+	unsigned r_alignment = 1;
+	int r_offset = -1;
+
+public:
+	Result apply(VariableDeclaration &v) { v.visit(*this); return Result(r_size, r_alignment); }
+	Result apply(TypeDeclaration &t) { t.visit(*this); return Result(r_size, r_alignment); }
+
+private:
+	virtual void visit(BasicTypeDeclaration &);
+	virtual void visit(StructDeclaration &);
+	virtual void visit(VariableDeclaration &);
+};
+
+/** Collects dependencies of a function.  This includes global variables,
+interface blocks, other functions and types. */
+class DependencyCollector: private TraversingVisitor
+{
+private:
+	std::set<Node *> dependencies;
+	std::set<Node *> locals;
+	std::set<FunctionDeclaration *> visited_functions;
+
+public:
+	std::set<Node *> apply(FunctionDeclaration &);
+
+private:
+	virtual void visit(VariableReference &);
+	virtual void visit(InterfaceBlockReference &);
+	virtual void visit(FunctionCall &);
+	virtual void visit(VariableDeclaration &);
+	virtual void visit(FunctionDeclaration &);
+};
+
 } // namespace SL
 } // namespace GL
 } // namespace Msp