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Why do they need 3D?

Why do they need 3D?

Posted Nov 6, 2011 17:56 UTC (Sun) by endecotp (guest, #36428)
In reply to: Why do they need 3D? by rleigh
Parent article: Rawhide gets GNOME Shell for all display types

> Cairo can use OpenVG for rendering

Well if you have HW OpenVG then you must surely have HW OpenGL too, so that's not so interesting. The question is, when you don't have (supported) 3D hardware, is it faster to do software rendering with Cairo or emulated OpenGL. (Or I suppose Cairo with an emulated OpenVG backend.)

If this new faster OpenGL emulation is really fast, then that could rationalise the requirements for the upper layers.

> I've just started looking into using either Cairo or OpenVG for
> producing OpenGL textures on the fly

I've been using AGG for this, but am now starting to use OpenGL. From what I've seen OpenVG doesn't give me much beyond OpenGL for the features I need.


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Why do they need 3D?

Posted Nov 6, 2011 20:01 UTC (Sun) by jlokier (guest, #52227) [Link]

From a brief look at OpenVG, there seeem to be chips that support hardware OpenVG and not hardware OpenGL. That seems to be much of the point of OpenVG: So low-end devices can acceperate graphics, without being powerful GL-capable GPUs. As far as I can tell, those chips are used only in phones, not desktops.


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