The issue was caused by the recent changes in the way how the
render result is drawn: the display driver now could hold an
OpenGL resources. Those resources are not shared across contexts
so whenever OpenGL context is destroyed those resources are to
be destroyed as well (and not attempted to be re-used for a next
render).
Do such destruction and entire driver re-creation since it does
simplifies things from API usage point of view without causing
measurable slowdown.
Steps to reproduce the issue:
- Set the render resolution to 2x of Full HD
- Enable persistent data
- Render (F12)
- Render again
Observe OpenGL state being corrupted. Easy to see in debug mode
where IMM abstraction level reports issues about the buffer size
not being the proper size. This was caused by the display driver
trying to use VAO from the previous OpenGL context.
Differential Revision: https://developer.blender.org/D13789
Remove prefix of filenames that is the same as the folder name. This used
to help when #includes were using individual files, but now they are always
relative to the cycles root directory and so the prefixes are redundant.
For patches and branches, git merge and rebase should be able to detect the
renames and move over code to the right file.
