Hi,
I made a QC plugin that changes its outputImage (@property(assign)
id<QCPlugInOutputImageProvider> outputImage) port each frame.
This image is then used by Sprite patch as its input Image.
The whole composition is played by application that is basically the
Quartz Composer Texture sample, except that it is capable of playing
multiple compositions at once and uses Core Video Display Link.
The problem is, when playing more than 3 of these compositions with my
custom plugin, the performance goes down and there is a frequent
stutter.
This is from Instruments:
Apparently, 42.9% of the time is being spent in gleTextureImagePut
function. I presume that the system isn't all too happy with changing
multiple textures each frame or something...
How can I optimize this?
Thanks,
Miso
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