[Pull Request] Glamor: A 2D rendering acceleration implementation based on OpenGL

[Alon Levy]

On Tue, Sep 27, 2011 at 11:00:50PM -0700, Eric Anholt wrote:
> On Tue, 27 Sep 2011 20:41:19 +0300, Alon Levy <alevy at redhat.com> wrote:
> > On Tue, Sep 27, 2011 at 09:50:06PM +0800, zhigang gong wrote:
> > > Hi Keith,
> > > 
> > > Here is the pull request to merge glamor. Basically, it has three parts.
> > > The first part is the 2D rendering acceleration implementation in
> > > glamor directory. It supports both OpenGL/GLESv2. The second part is
> > > in hw/kdrive/xephyr. This part integrate glamor into Xephyr. And by
> > > specify a "-glamor" when invoke the Xephyr then you can use glamor
> > > to accelerate the rendering operations. The third part is in
> > > hw/xfree86/glamor. This part implements a standalone ddx driver based
> > > on glamor, egl and kms. With this glamor driver, you can start up
> > > a Xserver over Mesa/EGL directly, without any native window system.
> > > 
> > 
> > I am not very familiar with either cairo/pixman, just know that it is
> > used in spice, and it has a GL backend. There is also clutter, and some
> > other open source 2D GL rendering libraries (qt canvas is also interesting,
> > although I guess it's C++). How is glamor related to them? (I guess some
> > of them don't support EGL, but looking at those who do - clutter certainly,
> > runs on my n900, and qt as well I think).
> 
> It's similar in that it's using GL, but it's not similar in that it's
> implementing a different rendering API, so all the GL code that matters
> is different.  It's like saying "Quake uses GL, how is glamor related to
> Quake?"

Well, I was assuming that there is a possible common area that is larger then GL,
but I guess I was wrong.

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