[Libreoffice-commits] core.git: Changes to 'feature/opengl-backbuffer'

[Michael Meeks]

New branch 'feature/opengl-backbuffer' available with the following commits:
commit 8b2536ee734c2d1b7a96017e498cde8e97ac70a3
Author: Michael Meeks <michael.meeks at collabora.com>
Date:   Fri Nov 13 12:00:59 2015 +0000

    tdf#93529 - move to a Mac-like double-buffered OpenGL model.
    
    This moves us to always rendering to an off-screen texture, and then
    (at idle) blitting this to the screen & swapping buffers. Ideally we
    should never see any rendering, or flicker again with this approach.
    
    Several fixes are included:
       + avoid multiple OpenGL contexts being created for the same window,
         created excessive flicker problems.
       + de-virtualize UseContext - which context we use is less critical.
       + kill 'mbOffscreen' distinction - all VCL rendering is offscreen.
       + implement 'doFlush' and high priority idle flushing.
       + bind stencil buffer for clipping vs. textures - fixing complex
         clopping when rendering to virtual-devices, and off-screen.
       + document environment. variables.
       + use white as default background glClear color, but red for DBGUTIL.
    
    Change-Id: I6be08595b6c8deb7e6db0dbd81308b2c97d2b4ff