From 77aa26661dace8f342c63d52a49d0cd881acf726 Mon Sep 17 00:00:00 2001
From: Swung0x48 <swung0x48@outlook.com>
Date: Thu, 29 Jan 2026 16:48:01 +0800
Subject: [PATCH] [Feat] (MG_Util/BackendLoaders/OpenGL, MG_Impl/Getter):
 retrieve real `GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT` from backend

---
 MobileGL/MG_Impl/GLImpl/Getter/GL_Getter.cpp      | 7 ++++++-
 MobileGL/MG_Util/BackendLoaders/OpenGL/Loader.cpp | 4 ++++
 MobileGL/MG_Util/BackendLoaders/OpenGL/Loader.h   | 2 ++
 3 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/MobileGL/MG_Impl/GLImpl/Getter/GL_Getter.cpp b/MobileGL/MG_Impl/GLImpl/Getter/GL_Getter.cpp
index c27ca8b8..b23b8e66 100644
--- a/MobileGL/MG_Impl/GLImpl/Getter/GL_Getter.cpp
+++ b/MobileGL/MG_Impl/GLImpl/Getter/GL_Getter.cpp
@@ -18,6 +18,7 @@
 #include <MG_State/GLState/FramebufferState/FramebufferObject.h>
 #if MOBILEGL_BACKEND == MOBILEGL_BACKEND_TYPE_DIRECT_GLES
 #include <MG_Backend/DirectGLES/DirectGLES.h>
+#include "MG_Util/BackendLoaders/OpenGL/Loader.h"
 #endif
 
 namespace MobileGL {
@@ -817,7 +818,11 @@ namespace MobileGL {
                 *params = 0; // TODO
                 break;
             case GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT:
-                *params = 256; // TODO: get real value from backend
+#if MOBILEGL_BACKEND == MOBILEGL_BACKEND_TYPE_DIRECT_GLES
+                *params = MG_External::GLES::g_glesCaps.uniformBufferOffsetAlignment; // TODO: get real value from backend
+#else
+                *params = 256;
+#endif
                 break;
             case GL_UNIFORM_BUFFER_SIZE:
                 *params = 0; // TODO
diff --git a/MobileGL/MG_Util/BackendLoaders/OpenGL/Loader.cpp b/MobileGL/MG_Util/BackendLoaders/OpenGL/Loader.cpp
index 8866acec..2a3be359 100644
--- a/MobileGL/MG_Util/BackendLoaders/OpenGL/Loader.cpp
+++ b/MobileGL/MG_Util/BackendLoaders/OpenGL/Loader.cpp
@@ -529,6 +529,10 @@ namespace MobileGL {
                         }
                     }
                 }
+
+                MGLOG_I("OpenGL ES capabilities:");
+                MG_External::GLES::glGetIntegerv(GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT, &MG_External::GLES::g_glesCaps.uniformBufferOffsetAlignment);
+                MGLOG_I("    GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT: %d", MG_External::GLES::g_glesCaps.uniformBufferOffsetAlignment);
             }
 
             void InitGLES() {
diff --git a/MobileGL/MG_Util/BackendLoaders/OpenGL/Loader.h b/MobileGL/MG_Util/BackendLoaders/OpenGL/Loader.h
index 1676641f..2f7b49f0 100644
--- a/MobileGL/MG_Util/BackendLoaders/OpenGL/Loader.h
+++ b/MobileGL/MG_Util/BackendLoaders/OpenGL/Loader.h
@@ -576,6 +576,8 @@ namespace MobileGL {
                     Version version;
                     Bool hasPersistentMapping;
                     Bool hasNorm16Texture;
+
+                    Int uniformBufferOffsetAlignment;
                 };
             } // namespace Caps