[Interest] redirecting Qt pixel data to designated buffer

[Thiago Macieira]

On Tuesday 06 January 2015 17:10:35 Selmeci, Tamás wrote:
> On Tue, 2015-01-06 at 07:56 -0800, Thiago Macieira wrote:
> > > Maybe the best would be to refactor 'linuxfb' so it doesn't write
> > > to /dev/fb*, but to my buffer. I'm just hesitating to begin this work
> > > until someone says there's no simpler solution...
> > 
> > You'll probably need that and patching Mesa too.
> 
> At this phase of development my intention is to disable any OpenGL etc.
> extension of Qt to force it to use software rendering/blitting. Why do I
> have to patch Mesa (which is a kind of OpenGL implementation if I'm not
> wrong) if my Qt doesn't use OpenGL/EGL at all?

See what Shawn said:

"QtQuick 2 items have no built-in support for rendering via QPainter, so it 
normally doesn’t work without OpenGL."

Qt as a whole doesn't require OpenGL. Qt Quick 2 does and you mentioned Qt 
Quick 2 classes that you wanted to use. So you have to make a choice here.

> In a very simplyfied approach, what I only have to do in 'linuxfb'
> platform plugin is copying the buffer data not to /dev/fb*, but into my
> buffer... is it correct?

I don't know.

-- 
Thiago Macieira - thiago.macieira (AT) intel.com
  Software Architect - Intel Open Source Technology Center