[Feat] (...): Implement scissor box in frontend and backend.

MobileGL/MG_State/GLState/Core.cpp

@@ -293,6 +293,14 @@ namespace MobileGL {
                 return m_renderState.GetCullFaceMode();
             }
 
+            void GLContext::SetScissorBox(IntVec4 box) {
+                m_renderState.SetScissorBox(box);
+            }
+
+            const IntVec4& GLContext::GetScissorBox() const {
+                return m_renderState.GetScissorBox();
+            }
+
             // Framebuffer
             Vector<Uint> GLContext::GenFramebufferNames(Uint number) {
                 return m_framebufferState.GenerateNames(number);

MobileGL/MG_State/GLState/Core.h

@@ -92,6 +92,8 @@ namespace MobileGL {
                 Int GetPixelStoreParam(PixelStoreParam param) const;
                 void SetCullFaceMode(CullFaceMode mode);
                 CullFaceMode GetCullFaceMode() const;
+                void SetScissorBox(IntVec4 box);      // x, y, width, height
+                const IntVec4& GetScissorBox() const; // x, y, width, height
 
                 // Framebuffer
                 Vector<Uint> GenFramebufferNames(Uint number);

MobileGL/MG_State/GLState/RenderState/RenderState.cpp

@@ -39,6 +39,9 @@ namespace MobileGL {
                 case CapabilityInput::CullFace:
                     m_cullFaceEnabled = enabled;
                     break;
+                case CapabilityInput::ScissorTest:
+                    m_scissorTestEnabled = enabled;
+                    break;
                 default: // not supported currently
                     break;
                 }
@@ -52,6 +55,8 @@ namespace MobileGL {
                     return m_depthTestEnabled;
                 case CapabilityInput::CullFace:
                     return m_cullFaceEnabled;
+                case CapabilityInput::ScissorTest:
+                    return m_scissorTestEnabled;
                 default:
                     return false;
                 }
@@ -134,6 +139,15 @@ namespace MobileGL {
             CullFaceMode RenderState::GetCullFaceMode() const {
                 return m_cullFaceMode;
             }
+
+            // --------------------- Scissor ---------------------
+            void RenderState::SetScissorBox(IntVec4 box) {
+                m_scissorBox = box;
+            }
+
+            const IntVec4& RenderState::GetScissorBox() const {
+                return m_scissorBox;
+            }
         } // namespace GLState
     } // namespace MG_State
 } // namespace MobileGL

MobileGL/MG_State/GLState/RenderState/RenderState.h

@@ -1,5 +1,6 @@
 #pragma once
 #include "MG_Util/Math/VectorTypes.h"
+#include "MG_Util/Types.h"
 #include <Includes.h>
 
 namespace MobileGL {
@@ -151,6 +152,10 @@ namespace MobileGL {
                 void SetCullFaceMode(CullFaceMode mode);
                 CullFaceMode GetCullFaceMode() const;
 
+                // Scissor
+                void SetScissorBox(IntVec4 box);      // x, y, width, height
+                const IntVec4& GetScissorBox() const; // x, y, width, height
+
             private:
                 // Rasterization
                 IntVec4 m_viewport = IntVec4(0, 0, 0, 0); // x, y, width, height
@@ -180,6 +185,10 @@ namespace MobileGL {
                 // Cull Face
                 Bool m_cullFaceEnabled = false;
                 CullFaceMode m_cullFaceMode = CullFaceMode::Back;
+
+                // Scissor
+                Bool m_scissorTestEnabled = false;
+                IntVec4 m_scissorBox = IntVec4(0, 0, 0, 0); // x, y, width, height
             };
         } // namespace GLState
     } // namespace MG_State