[Fix] (MG_State/RenderState): track front face mode

MobileGL/MG_State/GLState/Core.cpp

@@ -405,6 +405,14 @@ namespace MobileGL::MG_State {
             return m_renderState.GetCullFaceMode();
         }
 
+        void GLContext::SetFrontFaceMode(FrontFaceMode mode) {
+            m_renderState.SetFrontFaceMode(mode);
+        }
+
+        FrontFaceMode GLContext::GetFrontFaceMode() const {
+            return m_renderState.GetFrontFaceMode();
+        }
+
         void GLContext::SetScissorBox(IntVec4 box) {
             m_renderState.SetScissorBox(box);
         }

MobileGL/MG_State/GLState/Core.h

@@ -134,6 +134,8 @@ namespace MobileGL {
                 PixelStoreParameters GetPixelStoreParameters(Bool isUnpack) const;
                 void SetCullFaceMode(CullFaceMode mode);
                 CullFaceMode GetCullFaceMode() const;
+                void SetFrontFaceMode(FrontFaceMode mode);
+                FrontFaceMode GetFrontFaceMode() const;
                 void SetScissorBox(IntVec4 box);      // x, y, width, height
                 const IntVec4& GetScissorBox() const; // x, y, width, height
 

MobileGL/MG_State/GLState/RenderState/RenderState.cpp

@@ -349,6 +349,17 @@ namespace MobileGL {
                 return m_parameters.CullFaceModeSetting;
             }
 
+            void RenderState::SetFrontFaceMode(FrontFaceMode mode) {
+                if (m_parameters.FrontFaceModeSetting == mode) return;
+
+                m_parameters.FrontFaceModeSetting = mode;
+                ++m_version;
+            }
+
+            FrontFaceMode RenderState::GetFrontFaceMode() const {
+                return m_parameters.FrontFaceModeSetting;
+            }
+
             // --------------------- Scissor ---------------------
             void RenderState::SetScissorBox(IntVec4 box) {
                 if (m_parameters.ScissorBox == box) return;

MobileGL/MG_State/GLState/RenderState/RenderState.h

@@ -87,6 +87,13 @@ namespace MobileGL {
         Unknown = -1
     };
 
+    enum class FrontFaceMode {
+        CounterClockwise,
+        Clockwise,
+        FrontFaceModeCount,
+        Unknown = -1
+    };
+
     enum class CapabilityInput {
         Blend,
         ClipDistance0,
@@ -171,6 +178,7 @@ namespace MobileGL {
         // Cull Face
         Bool CullFaceEnabled = false;
         CullFaceMode CullFaceModeSetting = CullFaceMode::Back;
+        FrontFaceMode FrontFaceModeSetting = FrontFaceMode::CounterClockwise;
 
         // Scissor
         Bool ScissorTestEnabled = false;
@@ -235,6 +243,8 @@ namespace MobileGL {
                 // Cull Face
                 void SetCullFaceMode(CullFaceMode mode);
                 CullFaceMode GetCullFaceMode() const;
+                void SetFrontFaceMode(FrontFaceMode mode);
+                FrontFaceMode GetFrontFaceMode() const;
 
                 // Scissor
                 void SetScissorBox(IntVec4 box);      // x, y, width, height