[Fix] (MG_State/Buffer): pass PingPong test

MobileGL/MG_State/GLState/BufferState/BufferObject.h

@@ -15,7 +15,8 @@ namespace MobileGL {
 		AtomicCounter,
 		DispatchIndirect,
 		DrawIndirect,
-		ShaderStorage
+		ShaderStorage,
+        BufferTargetCount
 	};
 
 	enum class BufferUsage {

MobileGL/MG_State/GLState/BufferState/BufferState.cpp

@@ -18,7 +18,7 @@ namespace MobileGL {
 				// m_size = data.size;
 				memcpy(m_data.data() + atOffset, data.data, data.size);
 				// m_dirtyRange = MakeUnique<Range1D>(0, m_size);
-                m_dirtyRange.UnionUpdate(atOffset, atOffset + data.size - 1);
+                m_dirtyRange.UnionUpdate(atOffset, atOffset + data.size);
 			}
 
 			void* BufferObject::AcquireMemory(Bool markMapped, Bool read, Bool write) {
@@ -78,13 +78,7 @@ namespace MobileGL {
 			}
 
 			BindingSlot<BufferObject>& BufferState::GetBindingSlot(BufferTarget target) {
-				for (auto& slot : m_bindingSlots) {
-					if (slot.GetTarget() == target) {
-						return slot;
-					}
-				}
-				m_bindingSlots.emplace_back(target);
-				return m_bindingSlots.back();
+                return m_bindingSlots[(SizeT)target];
 			}
 		}
 	}

MobileGL/MG_State/GLState/BufferState/BufferState.h

@@ -5,6 +5,12 @@ namespace MobileGL {
 		namespace GLState {
 			class BufferState {
 			public:
+                BufferState() {
+                    for (SizeT i = 0; i < (SizeT)BufferTarget::BufferTargetCount; ++i) {
+                        m_bindingSlots[i] = BindingSlot<BufferObject>((BufferTarget)i);
+                    }
+                }
+
 				SharedPtr<BufferObject> GetBufferObject(Uint index);
 				Vector<Uint> GenerateNames(Uint number);
 				SharedPtr<BufferObject> CreateBufferObject(Uint index);
@@ -13,7 +19,7 @@ namespace MobileGL {
 			private:
 				UnorderedMap<Uint, SharedPtr<BufferObject>> m_bufferObjects;
 				IndexGenerator<Uint> m_indexGenerator;
-				Vector<BindingSlot<BufferObject>> m_bindingSlots;
+				Array<BindingSlot<BufferObject>, (SizeT)BufferTarget::BufferTargetCount> m_bindingSlots;
 			};
 		}
 	}