Memory increases every time I resize the window - c

Question

I have created a simple Win32 Application and try to fill the Client Area with a Color. When the line "Clear RenderTarget" is included I see that the memory increases a few KB every time I resize the window.
My WindowProc:
LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
switch (uMsg)
{
case WM_SIZE:
{
if (pRenderTarget != NULL)
{
RECT rc;
GetClientRect(globalWindowHandle, &rc);
D2D1_SIZE_U size = D2D1::SizeU(rc.right, rc.bottom);
pRenderTarget->Resize(size);
InvalidateRect(globalWindowHandle, NULL, FALSE);
}
return 0;
}
break;
case WM_CREATE:
{
HRESULT dx = D2D1CreateFactory(D2D1_FACTORY_TYPE_SINGLE_THREADED, &pFactory);
if (FAILED(dx))
{
MessageBox(globalWindowHandle, "Error creating D2D1Factory", "Error", MB_ICONERROR);
return -1;
}
return 0;
}
break;
case WM_KEYDOWN:
{
int ret = HandleKeyboardInput(uMsg, wParam, lParam);
if (ret == 0)
{
return 0;
}
}
break;
case WM_PAINT:
{
HRESULT hr = CreateGraphicsResources();
if (SUCCEEDED(hr))
{
PAINTSTRUCT ps;
HDC hdc = BeginPaint(hwnd, &ps);
pRenderTarget->BeginDraw();
// Clear RenderTarget
pRenderTarget->Clear(D2D1::ColorF(D2D1::ColorF::SkyBlue));
hr = pRenderTarget->EndDraw();
if (FAILED(hr) || hr == D2DERR_RECREATE_TARGET)
{
pRenderTarget->Release();
pSolidBrush->Release();
pRenderTarget = NULL;
pSolidBrush = NULL;
}
EndPaint(hwnd, &ps);
return 0;
}
}
break;
case WM_CLOSE:
{
int box = MessageBox(hwnd, "Would you like to close the editor ?", "Question", MB_OKCANCEL);
if (box == IDOK)
{
DestroyWindow(hwnd);
}
return 0;
}
break;
case WM_DESTROY:
{
PostQuitMessage(0);
return 0;
}
break;
default:
{
return DefWindowProc(hwnd, uMsg, wParam, lParam);
}
break;
}
return 0;
}
CreateGraphicsResources
HRESULT CreateGraphicsResources()
{
HRESULT hr = S_OK;
if (pRenderTarget == NULL)
{
RECT rc;
GetClientRect(globalWindowHandle, &rc);
D2D1_SIZE_U size = D2D1::SizeU(rc.right, rc.bottom);
hr = pFactory->CreateHwndRenderTarget(
D2D1::RenderTargetProperties(),
D2D1::HwndRenderTargetProperties(globalWindowHandle, size),
&pRenderTarget);
if (SUCCEEDED(hr))
{
const D2D1_COLOR_F color = D2D1::ColorF(1.0f, 1.0f, 1.0f, 0);
hr = pRenderTarget->CreateSolidColorBrush(color, &pSolidBrush);
if (SUCCEEDED(hr))
{
}
}
}
return hr;
}
Globals:
BOOL ctrlPressed = FALSE;
HWND globalWindowHandle;
ID2D1Factory *pFactory;
ID2D1SolidColorBrush *pSolidBrush;
ID2D1HwndRenderTarget *pRenderTarget;
Do I miss something to free up memory or what could be the reason? If I resize the window e.g. 5 sec the memory goes from 4KB up to 22KB.
My OS is Windows 10 x64

Answer 1

The issue seems to be solved. In fact the memory did not go up much more so it seems the OS assigns the other memory.