From 00f5741f7f23e1c4f725752eede7da1e3061ec3a Mon Sep 17 00:00:00 2001
From: Swung0x48 <swung0x48@outlook.com>
Date: Wed, 13 Aug 2025 14:19:37 +0800
Subject: [PATCH] [Feat] (MG_Util/ShaderCompiler): add new item to
 ShaderCompileBits and implement it

---
 .../MG_Util/ShaderTranspiler/ShaderCompiler.cpp   | 15 +++++++++++----
 MobileGL/MG_Util/ShaderTranspiler/Types.h         |  3 ++-
 2 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/MobileGL/MG_Util/ShaderTranspiler/ShaderCompiler.cpp b/MobileGL/MG_Util/ShaderTranspiler/ShaderCompiler.cpp
index d9f8e370..f98faf69 100644
--- a/MobileGL/MG_Util/ShaderTranspiler/ShaderCompiler.cpp
+++ b/MobileGL/MG_Util/ShaderTranspiler/ShaderCompiler.cpp
@@ -131,15 +131,22 @@ namespace MobileGL {
                 const char* src[] = {sourceStr.data()};
                 tshader->setStrings(src, 1);
                 tshader->setInvertY(true);
-                tshader->setEnvInput(glslang::EShSourceGlsl, lang, glslang::EShClientVulkan, 450);
-                tshader->setEnvClient(glslang::EShClientVulkan, glslang::EShTargetVulkan_1_3);
-                tshader->setEnvTarget(glslang::EShTargetSpv, glslang::EShTargetSpv_1_5);
+                if (attrib.flags & ShaderCompileBits::CompileForOpenGL) {
+                    tshader->setEnvInput(glslang::EShSourceGlsl, lang, glslang::EShClientOpenGL, 450);
+                    tshader->setEnvClient(glslang::EShClientOpenGL, glslang::EShTargetOpenGL_450);
+                    tshader->setEnvTarget(glslang::EShTargetSpv, glslang::EShTargetSpv_1_5);
+                } else {
+                    tshader->setEnvInput(glslang::EShSourceGlsl, lang, glslang::EShClientVulkan, 450);
+                    tshader->setEnvClient(glslang::EShClientVulkan, glslang::EShTargetVulkan_1_3);
+                    tshader->setEnvTarget(glslang::EShTargetSpv,
+                        ((attrib.flags & ShaderCompileBits::EmitDiscardAsDemote) ? glslang::EShTargetSpv_1_6 : glslang::EShTargetSpv_1_5));
+                }
                 tshader->setAutoMapLocations(true);
                 tshader->setAutoMapBindings(true);
                 tshader->setEnvInputVulkanRulesRelaxed(); // using EXT_vulkan_glsl_relaxed for gl_VertexID and
                                                           // gl_InstanceID?
                 tshader->setGlobalUniformBlockName(GLOBAL_UBO_NAME);
-                if (!tshader->parse(&GetTBuiltInResourceInstance(), 150, ECoreProfile,
+                if (!tshader->parse(&GetTBuiltInResourceInstance(), 460, ECoreProfile,
                                     /*forceDefaultVersionAndProfile: */ false,
                                     /*forwardCompatible: */ true, EShMsgDefault)) {
                     ResultInfo r;
diff --git a/MobileGL/MG_Util/ShaderTranspiler/Types.h b/MobileGL/MG_Util/ShaderTranspiler/Types.h
index 90761a66..dc0fc2c8 100644
--- a/MobileGL/MG_Util/ShaderTranspiler/Types.h
+++ b/MobileGL/MG_Util/ShaderTranspiler/Types.h
@@ -9,7 +9,8 @@ namespace MobileGL {
             struct EmptyType {};
 
             enum class ShaderCompileBits : Uint {
-                EmitDiscardAsDemote = 1 << 0,
+                CompileForOpenGL = 1 << 0,
+                EmitDiscardAsDemote = 1 << 1,
             };
 
             struct ShaderAttrib {