2012/7/17 <marius.storm-ol...@nokia.com> > > (2D accelerators are often bundled with GPUs and perform 2D rendering > > ops faster than GPUs, but are unusable with QML 2 / SceneGraph; see > > pvr2d). > 2D accelerators bundled with GPUs perform 2D rendering ops faster than > GPUs? Uhmm... that sentence is conflicting in my head, unless you mean > that you are using highly specialized boards with multiple GPUs (n*PVR) > on them to do things really really fast in parallel. >
[OT] No, I really mean dedicated 2D hardware chips outperform GPUs by far. It's easy to do certain common simple 2D graphics faster than most embedded GPUs I know of, even using the CPU. GPUs are built for (1) 3D transformations on textures, (2) vertex-heavy objects and (3) per-pixel shading operations. But it's easily beat for simple 2D operations like blit (e.g., DMA), filtering/scaling (e.g., FPGAs). Most mobiles / tablet UIs are 90% 2D. My point is simply that Qt 5 is best served with a painting backend for QML 2 that can support non-OpenGL technologies. -- Andreas Aardal Hanssen
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