Re: Checking Quartz Extreme & Altivec Relationship?
Re: Checking Quartz Extreme & Altivec Relationship?
- Subject: Re: Checking Quartz Extreme & Altivec Relationship?
- From: Scott Stevenson <email@hidden>
- Date: Tue, 9 Jan 2007 05:58:58 -0800
On Jan 9, 2007, at 5:17 AM, Matt R wrote:
my concern, as I mentioned, is that on my iMac G5, with Quartz Extreme
enabled, I have managed to push out an acceptable framerate using
NSImage
calls. However, if i turn off Quartz Extreme via the Quartz Debug
app my
framerate drops to the floor. I'm worried that on other machines
(ie the
Intel Macs), there may be hardware differences that will make
Quartz Extreme
function differently, and thus basically make my game unplayable
speed-wise.
Quartz Extreme works fine on Intel.
As for whether it's available, it appeared in Jaguar (4.5 years ago)
and requires a 16MB video card. Unless you believe your target
audience isn't running Jaguar or hardware that doesn't fit this
description, you don't have to worry about it.
I don't think anyone has any real reason to disable it unless they're
doing testing or development. I think that checkbox is now mostly
historical.
AltiVec is PowerPC-specific. I'm not anything near an expert with
this, but I think the idea is to use the Accelerate framework instead
to support both architectures:
http://developer.apple.com/performance/accelerateframework.html
Hope that helps,
- Scott
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