1 files changed, 75 insertions, 18 deletions
diff --git a/platform/winrt/include/GLSLANG/ShaderVars.h b/platform/winrt/include/GLSLANG/ShaderVars.h
index 03ddf956f1..dc452b0cf4 100644
--- a/platform/winrt/include/GLSLANG/ShaderVars.h
+++ b/platform/winrt/include/GLSLANG/ShaderVars.h
@@ -15,6 +15,7 @@
 #include <algorithm>
 
 // Assume ShaderLang.h is included before ShaderVars.h, for sh::GLenum
+// Note: make sure to increment ANGLE_SH_VERSION when changing ShaderVars.h
 
 namespace sh
 {
@@ -39,7 +40,7 @@ enum BlockLayoutType
 // Note: we must override the copy constructor and assignment operator so we can
 // work around excessive GCC binary bloating:
 // See https://code.google.com/p/angleproject/issues/detail?id=697
-struct ShaderVariable
+struct COMPILER_EXPORT ShaderVariable
 {
     ShaderVariable();
     ShaderVariable(GLenum typeIn, unsigned int arraySizeIn);
@@ -49,6 +50,22 @@ struct ShaderVariable
 
     bool isArray() const { return arraySize > 0; }
     unsigned int elementCount() const { return std::max(1u, arraySize); }
+    bool isStruct() const { return !fields.empty(); }
+
+    // All of the shader's variables are described using nested data
+    // structures. This is needed in order to disambiguate similar looking
+    // types, such as two structs containing the same fields, but in
+    // different orders. "findInfoByMappedName" provides an easy query for
+    // users to dive into the data structure and fetch the unique variable
+    // instance corresponding to a dereferencing chain of the top-level
+    // variable.
+    // Given a mapped name like 'a[0].b.c[0]', return the ShaderVariable
+    // that defines 'c' in |leafVar|, and the original name 'A[0].B.C[0]'
+    // in |originalName|, based on the assumption that |this| defines 'a'.
+    // If no match is found, return false.
+    bool findInfoByMappedName(const std::string &mappedFullName,
+                              const ShaderVariable **leafVar,
+                              std::string* originalFullName) const;
 
     GLenum type;
     GLenum precision;
@@ -56,58 +73,97 @@ struct ShaderVariable
     std::string mappedName;
     unsigned int arraySize;
     bool staticUse;
+    std::vector<ShaderVariable> fields;
+    std::string structName;
+
+  protected:
+    bool isSameVariableAtLinkTime(const ShaderVariable &other,
+                                  bool matchPrecision) const;
+
+    bool operator==(const ShaderVariable &other) const;
+    bool operator!=(const ShaderVariable &other) const
+    {
+        return !operator==(other);
+    }
 };
 
-struct Uniform : public ShaderVariable
+struct COMPILER_EXPORT Uniform : public ShaderVariable
 {
     Uniform();
     ~Uniform();
     Uniform(const Uniform &other);
     Uniform &operator=(const Uniform &other);
-
-    bool isStruct() const { return !fields.empty(); }
-
-    std::vector<Uniform> fields;
+    bool operator==(const Uniform &other) const;
+    bool operator!=(const Uniform &other) const
+    {
+        return !operator==(other);
+    }
+
+    // Decide whether two uniforms are the same at shader link time,
+    // assuming one from vertex shader and the other from fragment shader.
+    // See GLSL ES Spec 3.00.3, sec 4.3.5.
+    bool isSameUniformAtLinkTime(const Uniform &other) const;
 };
 
-struct Attribute : public ShaderVariable
+struct COMPILER_EXPORT Attribute : public ShaderVariable
 {
     Attribute();
     ~Attribute();
     Attribute(const Attribute &other);
     Attribute &operator=(const Attribute &other);
+    bool operator==(const Attribute &other) const;
+    bool operator!=(const Attribute &other) const
+    {
+        return !operator==(other);
+    }
 
     int location;
 };
 
-struct InterfaceBlockField : public ShaderVariable
+struct COMPILER_EXPORT InterfaceBlockField : public ShaderVariable
 {
     InterfaceBlockField();
     ~InterfaceBlockField();
     InterfaceBlockField(const InterfaceBlockField &other);
     InterfaceBlockField &operator=(const InterfaceBlockField &other);
+    bool operator==(const InterfaceBlockField &other) const;
+    bool operator!=(const InterfaceBlockField &other) const
+    {
+        return !operator==(other);
+    }
+
+    // Decide whether two InterfaceBlock fields are the same at shader
+    // link time, assuming one from vertex shader and the other from
+    // fragment shader.
+    // See GLSL ES Spec 3.00.3, sec 4.3.7.
+    bool isSameInterfaceBlockFieldAtLinkTime(
+        const InterfaceBlockField &other) const;
 
-    bool isStruct() const { return !fields.empty(); }
-
-    bool isRowMajorMatrix;
-    std::vector<InterfaceBlockField> fields;
+    bool isRowMajorLayout;
 };
 
-struct Varying : public ShaderVariable
+struct COMPILER_EXPORT Varying : public ShaderVariable
 {
     Varying();
     ~Varying();
-    Varying(const Varying &other);
+    Varying(const Varying &otherg);
     Varying &operator=(const Varying &other);
+    bool operator==(const Varying &other) const;
+    bool operator!=(const Varying &other) const
+    {
+        return !operator==(other);
+    }
 
-    bool isStruct() const { return !fields.empty(); }
+    // Decide whether two varyings are the same at shader link time,
+    // assuming one from vertex shader and the other from fragment shader.
+    // See GLSL ES Spec 3.00.3, sec 4.3.9.
+    bool isSameVaryingAtLinkTime(const Varying &other) const;
 
     InterpolationType interpolation;
-    std::vector<Varying> fields;
-    std::string structName;
+    bool isInvariant;
 };
 
-struct InterfaceBlock
+struct COMPILER_EXPORT InterfaceBlock
 {
     InterfaceBlock();
     ~InterfaceBlock();
@@ -116,6 +172,7 @@ struct InterfaceBlock
 
     std::string name;
     std::string mappedName;
+    std::string instanceName;
     unsigned int arraySize;
     BlockLayoutType layout;
     bool isRowMajorLayout;