On 2017-08-21 18:41, Bob Sneidar via use-livecode wrote:
Hi all.
Since acceleratedRendering is a stack property, does it only apply to
a given stack, and not, for example to a sub stack? What would the
advantage be of having it off? If none, why even have it?
It is per stack, and not inherited.
Whether you get a benefit or not from acceleratedRendering depends on
your stack. If you don't set the layerMode property on anything, then it
will generally cause a slight performance penalty (although this perhaps
needs more direct measurement to compare - particularly between desktop
and mobile which are very different graphics performance wise).
The benefits of acceleratedRendering come out when you aren't changing
how any object looks that often, and you have a lot of objects moving -
or, indeed, when you are moving large objects around, but not changing
very much of them as you do so.
So, for example, if you emulating visual effects by moving large
controls around periodically you might well find you get a better
framerate (particularly on mobile) by turning accelRendering on, setting
the layerMode of just the moving controls to dynamic, then turning it
off again.
If you are doing a game with lots of moving objects, then you will
pretty much always gain advantage from making all the moving object's
layerMode dynamic; and leaving the scenery / HUD type things as static.
Warmest Regards,
Mark.
--
Mark Waddingham ~ m...@livecode.com ~ http://www.livecode.com/
LiveCode: Everyone can create apps
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