Introduce internal and normal GPU functions

include/PSX/GPU/GPU.h

@@ -0,0 +1,17 @@
+#ifndef __JABYENGINE_GPU_H__
+#define __JABYENGINE_GPU_H__
+#include "../System/IOPorts/GPU_IO.hpp"
+
+namespace GPU {
+    namespace Display {
+        static void enable() {
+            Port::GP1.write(Port::Command::GP1::SetDisplayState(Port::DisplayState::On));
+        }
+
+        static void disable() {
+            Port::GP1.write(Port::Command::GP1::SetDisplayState(Port::DisplayState::Off));
+        }
+    }
+}
+
+#endif //!__JABYENGINE_GPU_H__

include/PSX/GPU/GPU_Types.hpp

@@ -16,6 +16,32 @@ namespace GPU {
             return ((this->blue << 16) | (this->green << 8) | this->red);
         }
     };
+
+    template<typename T>
+    struct Position {
+        T x = 0;
+        T y = 0;
+
+        constexpr Position() = default;
+        constexpr Position(T x, T y) : x(x), y(y) {
+        }
+    };
+
+    template<typename T>
+    struct Size {
+        T width  = 0;
+        T height = 0;
+
+        constexpr Size() = default;
+        constexpr Size(T w, T h) : width(w), height(h) {
+        }
+    };
+
+    typedef Position<int16_t>  PositionI16;
+    typedef Position<uint16_t> PositionU16;
+
+    typedef Size<int16_t>  SizeI16;
+    typedef Size<uint16_t> SizeU16;
 }
 
 #endif //!__JABYENGINE_GPU_TYPES_HPP__

include/PSX/System/IOPorts/GPU_IO.hpp

@@ -55,7 +55,7 @@ namespace GPU {
                 }
 
                 static constexpr GP0 WidthHeight(uint16_t w, uint16_t h) {
-                    return {(h << 16) | h};
+                    return {(h << 16) | w};
                 }
             };