private void ResizeSwapchain()
{
var dpiScale = GetDpiScale();
var width = (uint)(ActualWidth < 0 ? 0 : Math.Ceiling(ActualWidth * dpiScale));
var height = (uint)(ActualHeight < 0 ? 0 : Math.Ceiling(ActualHeight * dpiScale));
_sc.Resize(width, height);
}
public VeldridImGuiWindow(GraphicsDevice gd, ImGuiViewportPtr vp)
{
_gcHandle = GCHandle.Alloc(this);
_gd = gd;
_vp = vp;
SDL_WindowFlags flags = SDL_WindowFlags.Hidden;
if ((vp.Flags & ImGuiViewportFlags.NoTaskBarIcon) != 0)
{
flags |= SDL_WindowFlags.SkipTaskbar;
}
if ((vp.Flags & ImGuiViewportFlags.NoDecoration) != 0)
{
flags |= SDL_WindowFlags.Borderless;
}
else
{
flags |= SDL_WindowFlags.Resizable;
}
if ((vp.Flags & ImGuiViewportFlags.TopMost) != 0)
{
flags |= SDL_WindowFlags.AlwaysOnTop;
}
_window = new Sdl2Window(
"No Title Yet",
(int)vp.Pos.X, (int)vp.Pos.Y,
(int)vp.Size.X, (int)vp.Size.Y,
flags,
false);
_window.Resized += () => _vp.PlatformRequestResize = true;
_window.Moved += p => _vp.PlatformRequestMove = true;
_window.Closed += () => _vp.PlatformRequestClose = true;
SwapchainSource scSource = VeldridStartup.GetSwapchainSource(_window);
SwapchainDescription scDesc = new SwapchainDescription(scSource, (uint)_window.Width, (uint)_window.Height, null, true, false);
_sc = _gd.ResourceFactory.CreateSwapchain(scDesc);
_window.Resized += () => _sc.Resize((uint)_window.Width, (uint)_window.Height);
unsafe
{
ViewportDataPtr data = new ViewportDataPtr(Marshal.AllocHGlobal(Unsafe.SizeOf <ViewportDataPtr>()));
vp.PlatformUserData = new HandleRef(data, (IntPtr)data.NativePtr).Handle;
}
vp.PlatformUserData = (IntPtr)_gcHandle;
}
public void Resize(uint width, uint height)
{
if (Swapchain is object &&
Camera is object &&
rendering.WaitOne())
{
try
{
Swapchain.Resize(width, height);
Camera.AspectRatio = AspectRatio;
}
finally
{
_ = rendering.Release();
}
}
}
// Called whenever view changes orientation or layout is changed
public override void ViewDidLayoutSubviews()
{
base.ViewDidLayoutSubviews();
_sc.Resize((uint)View.Frame.Width, (uint)View.Frame.Height);
Resized?.Invoke();
}
