[Feat]: (MG_Util/ShaderTranspiler): the skeleton of defining a custom TIoResolver

CMakeLists.txt

@@ -34,6 +34,8 @@ if (MSVC)
     set(CMAKE_CXX_FLAGS "/EHsc ${CMAKE_CXX_FLAGS}")
 endif()
 
+set(ENABLE_RTTI                ON  CACHE BOOL "Enables RTTI (will be took by glslang)" FORCE)
+
 set(ENABLE_GLSLANG_BINARIES    OFF CACHE BOOL "Disable glslangValidator/spirv-remap" FORCE)
 set(ENABLE_SPVREMAPPER         OFF CACHE BOOL "Disable SPVRemapper" FORCE)
 set(ENABLE_OPT                 OFF CACHE BOOL "Disable SPIRV-Tools opt usage in glslang" FORCE)
@@ -86,6 +88,7 @@ set(SOURCE_FILES
     MobileGL/MG_Util/ShaderTranspiler/ShaderCompiler.cpp
     MobileGL/MG_Util/ShaderTranspiler/SpvcSession.cpp
     MobileGL/MG_Util/ShaderTranspiler/ShaderSourceProcessor.cpp
+    MobileGL/MG_Util/ShaderTranspiler/glslang/TMglGlslIoResolver.cpp
 
     MobileGL/MG_Util/BackendLoaders/OpenGL/Loader.cpp
 

MobileGL/Includes.h

@@ -56,7 +56,6 @@
 // Include glslang headers
 #include <glslang/Include/Types.h>
 #include <glslang/Public/ShaderLang.h>
-#include <glslang/Public/ShaderLang.h>
 #include <glslang/SPIRV/GlslangToSpv.h>
 #include <glslang/Include/intermediate.h>
 #include <glslang/MachineIndependent/localintermediate.h>

MobileGL/MG_Util/ShaderTranspiler/ShaderCompiler.h

@@ -1,6 +1,8 @@
 #pragma once
 #include <Includes.h>
 #include "SpvcSession.h"
+#include "glslang/TVarEntryInfo.h"
+#include "glslang/TMglGlslIoResolver.h"
 
 namespace MobileGL {
     namespace MG_Util {

MobileGL/MG_Util/ShaderTranspiler/glslang/TMglGlslIoResolver.cpp

@@ -0,0 +1,13 @@
+//
+// Created by Swung 0x48 on 2025/11/10.
+//
+
+#include "TMglGlslIoResolver.h"
+
+int TMglGlslIoResolver::resolveInOutLocation(EShLanguage stage, glslang::TVarEntryInfo &ent) {
+    return glslang::TDefaultGlslIoResolver::resolveInOutLocation(stage, ent);
+}
+
+int TMglGlslIoResolver::resolveUniformLocation(EShLanguage stage, glslang::TVarEntryInfo &ent) {
+    return glslang::TDefaultGlslIoResolver::resolveUniformLocation(stage, ent);
+}

MobileGL/MG_Util/ShaderTranspiler/glslang/TMglGlslIoResolver.h

@@ -0,0 +1,20 @@
+//
+// Created by Swung 0x48 on 2025/11/10.
+//
+
+#pragma once
+
+#include <vector>
+#include <unordered_map>
+#include <glslang/Public/ShaderLang.h>
+#include <glslang/Include/Types.h>
+#include <glslang/Include/intermediate.h>
+#include <glslang/MachineIndependent/iomapper.h>
+#include "TVarEntryInfo.h"
+
+class TMglGlslIoResolver: public glslang::TDefaultGlslIoResolver {
+    int resolveInOutLocation(EShLanguage stage, glslang::TVarEntryInfo& ent) override;
+    int resolveUniformLocation(EShLanguage /*stage*/, glslang::TVarEntryInfo& ent) override;
+};
+
+

MobileGL/MG_Util/ShaderTranspiler/glslang/TVarEntryInfo.h

@@ -0,0 +1,29 @@
+//
+// Created by Swung 0x48 on 2025/11/10.
+//
+
+#pragma once
+#include <glslang/Include/Types.h>
+
+/*
+ * This file is ripped from glslang/MachineIndependent/iomapper.cpp
+ * As an temporary solution to define a custom glslang::TIoMapResolver
+ * with previously public APIs
+ */
+
+namespace glslang {
+    struct TVarEntryInfo {
+        long long id;
+        TIntermSymbol *symbol;
+        bool live;
+        TLayoutPacking upgradedToPushConstantPacking; // ElpNone means it hasn't been upgraded
+        int newBinding;
+        int newSet;
+        int newLocation;
+        int newComponent;
+        int newIndex;
+        EShLanguage stage;
+
+        void clearNewAssignments();
+    };
+}