[Feat] (MG_State/GLState): Implement BufferObject.

MobileGL/MG_State/GLState/BufferState/BufferState.h

@@ -0,0 +1,34 @@
+#pragma once
+
+namespace MobileGL {
+	namespace MG_State {
+		namespace GLState {
+			class BufferState {
+			public:
+				SharedPtr<BufferObject> GetBufferObjectByIndex(Uint index) {
+					auto it = m_bufferObjects.find(index);
+					if (it != m_bufferObjects.end()) {
+						return it->second;
+					}
+					return nullptr;
+				}
+
+				Vector<Uint> GenerateByNum(Uint number) {
+					Vector<Uint> buffers;
+					m_indexGenerator.Generate(number, reinterpret_cast<Uint*>(&buffers));
+					return buffers;
+				}
+
+				SharedPtr<BufferObject> CreateBufferObject(Uint index) {
+					auto bufferObject = MakeShared<BufferObject>();
+					m_bufferObjects[index] = bufferObject;
+					return bufferObject;
+				}
+
+			private:
+				UnorderedMap<Uint, SharedPtr<BufferObject>> m_bufferObjects;
+				IndexGenerator<Uint> m_indexGenerator;
+			};
+		}
+	}
+}