Brecht Van Lommel
f17dcf58c8
* Viewer node could free image while it is being redrawn, viewer image buffers now need acquire/release to be accessed as was already the case for render results. * The Composite node could free the image buffers outside of a lock, also causing simultaneous redraw to crash. * Especially on Windows, re-rendering could crash when drawing an image that was freed. When RE_RenderInProgress was true it would access the image buffer and simply return it while it could still contain a pointer to a render result buffer that was already freed. I don't understand why this case was there in the first place, so I've removed it. Possibly fixes bugs #20174, #21418, #21391, #21394.