Viewport drawing has moved to offscreen buffers, and we no longer need to have
depth, stencil, aa samples, sRGB buffers as part of the window. So all that
code is removed now. The depth buffer was the only one still being allocated,
its removal save a bit of memory.
Code by Germano and Brecht.
Differential Revision: https://developer.blender.org/D4708
BF-admins agree to remove header information that isn't useful,
to reduce noise.
- BEGIN/END license blocks
Developers should add non license comments as separate comment blocks.
No need for separator text.
- Contributors
This is often invalid, outdated or misleading
especially when splitting files.
It's more useful to git-blame to find out who has developed the code.
See P901 for script to perform these edits.
We use a hidden window for each offscreen context we need.
On X11 (linux) it does not show any other windows in the OS task bar
but it might be the case on other operating systems (untested).
Offscreen contexts are not attached to a window and can only be used for rendering to frambuffer objects.
CGL implementation : Brecht Van Lommel (brecht)
GLX implementation : Clément Foucault (fclem)
WGL implementation : Germano Cavalcante (mano-wii)
Other implementation are just place holder for now.
MX (Multiple conteXt) support was dropped from the GLEW 2.0 library to make core profile support cleaner.
Our WITH_GLEW_MX build option was OFF by default already; this commit removes the inactive code paths.
I'm working on a plan for multiple GPUs, contexts, resource sharing, etc. This commit gives us a cleaner starting point for that upcoming work.
Tested on Mac, will test on Linux & Windows immediately after pushing.
