Exception when creating surface with collapsed swapchainpanel and fixed scale

[teshca]

In demo app

1. add visibility collapsed to xaml
   <SwapChainPanel x:Name="swapChainPanel" Visibility="Collapsed" >
2. specify any scale in CreateRenderSurface
   float customResolutionScale = 1.0f;
mRenderSurface = mOpenGLES->CreateSurface(swapChainPanel, nullptr, &customResolutionScale);

Run application after this two steps, you will get an exception "Can't create surface"

The problem is that in function

HRESULT SwapChainPanelNativeWindow::scaleSwapChain(const SIZE &windowSize, const RECT &clientRect)

we do not check size fo zero and get NaN in here

Size renderScale = {(float)windowSize.cx / (float)clientRect.right, (float)windowSize.cy / (float)clientRect.bottom};

[teshca]

This is only valid for surface creation. We also call this fuction when sizeChanged event fired but we never check if the result was a SUCCESS in that case

[austinkinross]

Hi there, thanks for reporting this!

We've been snowed under with other work recently, but we will try to investigate this soon.

[austinkinross]

Hi there, apologies for the delay here. If you are still having trouble with this then please consider contacting the master ANGLE mailing list: https://groups.google.com/forum/#!forum/angleproject

Thanks
Austin