My question belongs on the quartz-dev list, but while we're at it:
Can I tell Core Image to use the GPU from an application so the user
can choose depending on the quartz composition? My program uses the
CPU quite heavily for compressing and streaming to DV, so I believe
using the GPU would be faster in this case. Another solution would be
using the other CPU (when I learn to use multithreading methods), but
that obviously wouldn't do for the iMac.
Kjetil Valen
email@hidden
On Jun 19, 2005, at 9:23 PM, Pierre-Olivier Latour wrote:
I try the tutorial on Quartz Composer Programming Guide
(qc_howto.pdf). At page 42, before "Increase the Glow Effect", in
the viewer, i have 2-3 fps on the rotating cube.
I have an iMac G5 1.8 GHz GeForce FX 5200, but the OpenGL Info
patch say this : "Core Image accelerated" : FALSE (the name for my
video card is "NVIDIA NV34MAP OpenGL Engine" in the openGL Info
patch).
Why?
iMac G5 is Core Image Ready.
Is 2-3 fps a normal performance on iMac G5 ?
That is the correct behavior: the FX5200 can potentially support
Core Image in hardware, but does not by default, as in many cases,
rendering on the CPU gives better performances.
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