commit 8d6c1b6981f01bbc0057234f53fd139e87a5f010
author Michael Meeks <michael.meeks@collabora.com> Tue Jan 12 21:02:01 2016 +0000
committer Tor Lillqvist <tml@collabora.com> Tue Jan 12 22:02:00 2016 +0000
tree 13aaeb573ecf06214a8c7a9bc76d2a93d518089f
parent ab95fb7a19d7847dd1cbfad0059cc175a809a50f

tdf#96385 - opengl: dynamically adjust priority of swap buffers.

Initially we start with a very low priority, so that the lame
bits of code that do eg. focus, and cursor rendering before the
document is visible do not cause a swap, flash. Then after we've
processed a REPAINT priority idle (hopefully our first paint) we
adjust the swap priority to highest.

Essentially a fusion of Tor's approach and mine.

Change-Id: Ib9b78a18fb9359ac8c3dee1cfeb30177c08fe162
Reviewed-on: https://gerrit.libreoffice.org/21405
Reviewed-by: Tor Lillqvist <tml@collabora.com>
Tested-by: Tor Lillqvist <tml@collabora.com>

vcl/opengl/gdiimpl.cxx

diff --git a/vcl/opengl/gdiimpl.cxx b/vcl/opengl/gdiimpl.cxx
index d01d66b..73804c7 100644
--- a/vcl/opengl/gdiimpl.cxx
+++ b/vcl/opengl/gdiimpl.cxx
@@ -47,7 +47,8 @@ public:
        : Idle( "gl idle swap" )
        , m_pImpl( pImpl )
    {
        SetPriority( SchedulerPriority::HIGHEST );
        // We don't want to be swapping before we've painted.
        SetPriority( SchedulerPriority::POST_PAINT );
    }
    virtual ~OpenGLFlushIdle()
    {
@@ -55,6 +56,7 @@ public:
    virtual void Invoke() override
    {
        m_pImpl->doFlush();
        SetPriority( SchedulerPriority::HIGHEST );
        Stop();
    }
};