[Feat] (GL_State/RenderState): implement ClearStencil

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

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) {

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);
             }

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;

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)                                                       \

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);