PDF does not render correctly with OSR and Surfaces Disabled

[amaitland]

Testing with cef_binary_3.2785.1480.g162e9a9_windows32_client the PDF viewer is not working with OSR rendering and GPU Acceleration Enabled.

Same behavior as demonstrated in https://bitbucket.org/chromiumembedded/cef/issues/1689 (resize to get the PDF to draw).

1. Run cefclient.exe --multi-threaded-message-loop --off-screen-rendering-enabled --enable-gpu --disable-surfaces
2. Load a PDF example like http://tests/pdf

Disable GPU acceleration and the problem PDF renders correctly. Previous it was enough to just Disable Surfaces.

I've only tested on Windows. Can someone else confirm they're seeing a problem?

[magreenblatt]

Disable-surfaces support has been removed in Chromium. The fix will be tracked by https://bitbucket.org/chromiumembedded/ ... -correctly. A temporary workaround is to call Invalidate() on a timer.

[amaitland]

Thanks for the prompt reply! Any guidance for calling Invalidate? Times per second? Only when PDF is showing?

[magreenblatt]

20 to 30 fps is probably fine. It's only necessary when a PDF is showing.

[amaitland]

20 to 30 fps is probably fine. It's only necessary when a PDF is showing.

Thanks, I'll give it a test at some point and see how it goes.

I added some additional formation at https://bitbucket.org/chromiumembedded/ ... t-30699066 feel free to add/edit/delete as you see fit.

Thanks again for the quick reply.