From f8f3d6e657184db3530ac5edbf4ddff5e5f18133 Mon Sep 17 00:00:00 2001
From: Swung0x48 <swung0x48@outlook.com>
Date: Tue, 17 Feb 2026 08:17:26 +0800
Subject: [PATCH] [Feat] (GL_State/RenderState): implement ClearStencil

---
 MobileGL/MG_Impl/GLImpl/Getter/GL_Getter.cpp          |  4 ++--
 .../MG_Impl/GLImpl/RenderState/GL_RenderState.cpp     |  2 +-
 MobileGL/MG_State/GLState/Core.cpp                    | 10 +++++++++-
 MobileGL/MG_State/GLState/Core.h                      |  4 +++-
 MobileGL/MG_State/GLState/RenderState/RenderState.cpp | 11 +++++++++++
 MobileGL/MG_State/GLState/RenderState/RenderState.h   |  5 ++++-
 6 files changed, 30 insertions(+), 6 deletions(-)

diff --git a/MobileGL/MG_Impl/GLImpl/Getter/GL_Getter.cpp b/MobileGL/MG_Impl/GLImpl/Getter/GL_Getter.cpp
index 14957df5..10cdf8dd 100644
--- a/MobileGL/MG_Impl/GLImpl/Getter/GL_Getter.cpp
+++ b/MobileGL/MG_Impl/GLImpl/Getter/GL_Getter.cpp
@@ -721,7 +721,7 @@ namespace MobileGL {
                 *params = 0; // TODO
                 break;
             case GL_STENCIL_CLEAR_VALUE:
-                *params = 0; // TODO
+                *params = MG_State::pGLContext->GetClearStencil();
                 break;
             case GL_STENCIL_FAIL:
                 *params = 0; // TODO
@@ -922,4 +922,4 @@ namespace MobileGL {
             return MG_Util::ConvertErrorCodeToGLEnum(errorCode);
         }
     } // namespace MG_Impl::GLImpl
-} // namespace MobileGL
\ No newline at end of file
+} // namespace MobileGL
diff --git a/MobileGL/MG_Impl/GLImpl/RenderState/GL_RenderState.cpp b/MobileGL/MG_Impl/GLImpl/RenderState/GL_RenderState.cpp
index 3f4f2b55..bc3b9150 100644
--- a/MobileGL/MG_Impl/GLImpl/RenderState/GL_RenderState.cpp
+++ b/MobileGL/MG_Impl/GLImpl/RenderState/GL_RenderState.cpp
@@ -261,7 +261,7 @@ namespace MobileGL {
         }
 
         void ClearStencil_State(GLint s) {
-            // TODO: implement
+            MG_State::pGLContext->SetClearStencil(static_cast<Int>(s));
         }
 
         void ClearDepth_State(GLclampd depth) {
diff --git a/MobileGL/MG_State/GLState/Core.cpp b/MobileGL/MG_State/GLState/Core.cpp
index 93008e65..dc91933a 100644
--- a/MobileGL/MG_State/GLState/Core.cpp
+++ b/MobileGL/MG_State/GLState/Core.cpp
@@ -312,6 +312,14 @@ namespace MobileGL {
                 return m_renderState.GetClearDepth();
             }
 
+            void GLContext::SetClearStencil(Int stencil) {
+                m_renderState.SetClearStencil(stencil);
+            }
+
+            Int GLContext::GetClearStencil() const {
+                return m_renderState.GetClearStencil();
+            }
+
             void GLContext::SetPixelStoreParam(PixelStoreParam param, Int value) {
                 m_renderState.SetPixelStoreParam(param, value);
             }
@@ -432,4 +440,4 @@ namespace MobileGL {
 
         GLState::GLContext* pGLContext;
     } // namespace MG_State
-} // namespace MobileGL
\ No newline at end of file
+} // namespace MobileGL
diff --git a/MobileGL/MG_State/GLState/Core.h b/MobileGL/MG_State/GLState/Core.h
index 3ac2eeac..3bc61ea6 100644
--- a/MobileGL/MG_State/GLState/Core.h
+++ b/MobileGL/MG_State/GLState/Core.h
@@ -111,6 +111,8 @@ namespace MobileGL {
                 const FloatVec4& GetClearColor() const;
                 void SetClearDepth(Float depth);
                 Float GetClearDepth() const;
+                void SetClearStencil(Int stencil);
+                Int GetClearStencil() const;
                 void SetPixelStoreParam(PixelStoreParam param, Int value);
                 Int GetPixelStoreParam(PixelStoreParam param) const;
                 PixelStoreParameters GetPixelStoreParameters(Bool isUnpack) const;
@@ -161,4 +163,4 @@ namespace MobileGL {
 
         extern GLState::GLContext* pGLContext;
     } // namespace MG_State
-} // namespace MobileGL
\ No newline at end of file
+} // namespace MobileGL
diff --git a/MobileGL/MG_State/GLState/RenderState/RenderState.cpp b/MobileGL/MG_State/GLState/RenderState/RenderState.cpp
index b23f5c34..434af714 100644
--- a/MobileGL/MG_State/GLState/RenderState/RenderState.cpp
+++ b/MobileGL/MG_State/GLState/RenderState/RenderState.cpp
@@ -222,6 +222,17 @@ namespace MobileGL {
                 return m_parameters.ClearDepth;
             }
 
+            void RenderState::SetClearStencil(Int stencil) {
+                if (m_parameters.ClearStencil == stencil) return;
+
+                m_parameters.ClearStencil = stencil;
+                ++m_version;
+            }
+
+            Int RenderState::GetClearStencil() const {
+                return m_parameters.ClearStencil;
+            }
+
             // -------------------- Pixel Store --------------------
             void RenderState::SetPixelStoreParam(PixelStoreParam param, Int value) {
 #define SET_PIXEL_STORE_PARAM(paramNameHead, paramNameTail, val)                                                       \
diff --git a/MobileGL/MG_State/GLState/RenderState/RenderState.h b/MobileGL/MG_State/GLState/RenderState/RenderState.h
index 0b1a3214..6f7b4096 100644
--- a/MobileGL/MG_State/GLState/RenderState/RenderState.h
+++ b/MobileGL/MG_State/GLState/RenderState/RenderState.h
@@ -154,6 +154,7 @@ namespace MobileGL {
         // Clear State
         FloatVec4 ClearColor = FloatVec4(0.0f, 0.0f, 0.0f, 1.0f);
         Float ClearDepth = 1.0f;
+        Int ClearStencil = 0;
 
         // Cull Face
         Bool CullFaceEnabled = false;
@@ -207,6 +208,8 @@ namespace MobileGL {
                 const FloatVec4& GetClearColor() const;
                 void SetClearDepth(Float depth);
                 Float GetClearDepth() const;
+                void SetClearStencil(Int stencil);
+                Int GetClearStencil() const;
 
                 // Pixel Store
                 void SetPixelStoreParam(PixelStoreParam param, Int value);
@@ -231,4 +234,4 @@ namespace MobileGL {
             };
         } // namespace GLState
     } // namespace MG_State
-} // namespace MobileGL
\ No newline at end of file
+} // namespace MobileGL