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Source/Engine/ShadersCompilation/Parser/IShaderParser.h

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+// Copyright (c) 2012-2020 Wojciech Figat. All rights reserved.
+
+#pragma once
+
+#include "Config.h"
+
+#if COMPILE_WITH_SHADER_COMPILER
+
+namespace ShaderProcessing
+{
+    struct ParserMacros
+    {
+        const Array<ShaderMacro>* Data;
+
+        ParserMacros(const Array<ShaderMacro>& data)
+        {
+            Data = &data;
+        }
+
+        Token GetValue(Token& token) const
+        {
+            for (int32 i = 0; i < Data->Count(); i++)
+            {
+                if (token == Data->At(i).Name)
+                {
+                    // Use macro value
+                    return Token(Data->At(i).Definition);
+                }
+            }
+
+            // Fallback to token
+            return token;
+        }
+    };
+
+    /// <summary>
+    /// Interface describing shader source code parser
+    /// </summary>
+    class IShaderParser
+    {
+    public:
+
+        /// <summary>
+        /// Virtual destructor
+        /// </summary>
+        virtual ~IShaderParser()
+        {
+        }
+
+    public:
+
+        /// <summary>
+        /// Gets the parser feature level of the target platform graphics backend.
+        /// </summary>
+        /// <returns>The graphics feature level</returns>
+        virtual FeatureLevel GetFeatureLevel() const = 0;
+
+        /// <summary>
+        /// Gets the parser macros.
+        /// </summary>
+        /// <returns>The macros</returns>
+        virtual ParserMacros GetMacros() const = 0;
+
+        /// <summary>
+        /// Gets value indicating that shader processing operation failed
+        /// </summary>
+        /// <returns>True if shader processing failed, otherwise false</returns>
+        virtual bool Failed() const = 0;
+
+        /// <summary>
+        /// Gets source code reader
+        /// </summary>
+        /// <returns>Source code reader</returns>
+        virtual Reader& GetReader() = 0;
+
+        /// <summary>
+        /// Event send to the parser on reading shader source code error
+        /// </summary>
+        /// <param name="message">Message to send</param>
+        virtual void OnError(const String& message) = 0;
+
+        /// <summary>
+        /// Event send to the parser on reading shader source code warning
+        /// </summary>
+        /// <param name="message">Message to send</param>
+        virtual void OnWarning(const String& message) = 0;
+    };
+}
+
+#endif