- 1 year ago
IDXGISwapChain->ResizeBuffers does not work as expected with WM_SIZING
When using IDXGISwapChain->ResizeBuffers
with WM_SIZING
in Windows, it may not work as expected because WM_SIZING
is a continuous message that is sent repeatedly while resizing the window. Calling ResizeBuffers
directly within the WM_SIZING
message handler can result in flickering or incorrect rendering.
To handle window resizing properly with IDXGISwapChain
, you can use the WM_SIZE
message instead of WM_SIZING
. Here's a suggested approach:
Register a
WM_SIZE
message handler: Register aWM_SIZE
message handler in your window procedure to handle window resizing events.Handle
WM_SIZE
: In theWM_SIZE
message handler, callIDXGISwapChain->ResizeBuffers
to resize the swap chain's buffers appropriately based on the new window size. Make sure to handle any errors or return values correctly.cppcase WM_SIZE:
{
UINT width = LOWORD(lParam);
UINT height = HIWORD(lParam);
// Resize the swap chain buffers
HRESULT hr = pSwapChain->ResizeBuffers(1, width, height, DXGI_FORMAT_UNKNOWN, 0);
// Handle the return value and any errors
if (FAILED(hr))
{
// Handle the error condition
}
// Continue with further processing
break;
}
Redraw or update the window contents: After calling
ResizeBuffers
, you may need to update or redraw the contents of the window to reflect the new size. This typically involves invalidating the window area and triggering a repaint or refreshing of the graphics content.cppInvalidateRect(hWnd, nullptr, TRUE);
UpdateWindow(hWnd);
By using WM_SIZE
instead of WM_SIZING
, you can ensure that IDXGISwapChain->ResizeBuffers
is called once after the resizing operation is complete, avoiding unnecessary flickering and incorrect rendering during the resizing process.
Make sure to handle other necessary message processing in your window procedure and handle any errors or additional operations specific to your application's requirements.