user32: Track the number of GL surfaces for a window rather than the pixel format.

Alexandre Julliard julliard at
Tue May 6 08:42:10 CDT 2014

Ken Thomases <ken at> writes:

> The specific pixel format was never used.  It was effectively just a flag
> indicating if the window had a GL surface.  This generalizes it from a flag
> to a count, to allow for multiple GL surfaces.

I'm not convinced that the concept of multiple surfaces makes sense,
except maybe as a driver implementation detail.

Alexandre Julliard
julliard at

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