From 427e069085ba943e03b01e1780af7b5c734b15f3 Mon Sep 17 00:00:00 2001
From: BZLZHH <admin@bzlzhh.top>
Date: Mon, 25 Aug 2025 15:11:56 +0800
Subject: [PATCH] [Feat] (MG_State/TextureState): Implement GetMipmap for
 TextureObject.

---
 MobileGL/MG_State/GLState/TextureState/TextureObject.cpp | 8 ++++++++
 MobileGL/MG_State/GLState/TextureState/TextureObject.h   | 2 ++
 2 files changed, 10 insertions(+)

diff --git a/MobileGL/MG_State/GLState/TextureState/TextureObject.cpp b/MobileGL/MG_State/GLState/TextureState/TextureObject.cpp
index 7da5a935..9f9eac08 100644
--- a/MobileGL/MG_State/GLState/TextureState/TextureObject.cpp
+++ b/MobileGL/MG_State/GLState/TextureState/TextureObject.cpp
@@ -34,6 +34,14 @@ namespace MobileGL {
                 return m_mipmaps;
             }
 
+            MipmapLevelInternal& TextureObjectBase::GetMipmap(Int index) {
+                if (index > m_mipmaps.size()) {
+                    // fallback to the last mipmap
+                    index = static_cast<Int>(m_mipmaps.size() - 1);
+                }
+                return m_mipmaps[index];
+            }
+
             void TextureObjectBase::SetInternalFormat(TextureInternalFormat format) {
                 m_internalFormat = format;
             }
diff --git a/MobileGL/MG_State/GLState/TextureState/TextureObject.h b/MobileGL/MG_State/GLState/TextureState/TextureObject.h
index 0b5a2178..fdbad224 100644
--- a/MobileGL/MG_State/GLState/TextureState/TextureObject.h
+++ b/MobileGL/MG_State/GLState/TextureState/TextureObject.h
@@ -207,6 +207,7 @@ namespace MobileGL {
                 virtual IntVec3 GetBaseSize() const = 0;
                 virtual SharedPtr<SamplerObject> GetSamplerObject() const = 0;
                 virtual const Vector<MipmapLevelInternal>& GetMipmaps() const = 0;
+                virtual MipmapLevelInternal& GetMipmap(Int index) = 0;
                 virtual void SetInternalFormat(TextureInternalFormat format) = 0;
             };
 
@@ -221,6 +222,7 @@ namespace MobileGL {
                 IntVec3 GetBaseSize() const override;
                 SharedPtr<SamplerObject> GetSamplerObject() const override;
                 const Vector<MipmapLevelInternal>& GetMipmaps() const override;
+                MipmapLevelInternal& GetMipmap(Int index) override;
                 void SetInternalFormat(TextureInternalFormat format) override;
 
             protected: