formatsFloatRGBABitmapsAsARGB?
formatsFloatRGBABitmapsAsARGB?
- Subject: formatsFloatRGBABitmapsAsARGB?
- From: Stonewall Ballard <email@hidden>
- Date: Tue, 18 Nov 2008 11:55:56 -0500
What does it mean for Motion 3 to return YES for [_hostCapabilities
formatsFloatRGBABitmapsAsARGB]? That makes no sense to me. I thought
this was supposed to return NO for hosts that labeled their float
bitmaps correctly, which Motion 3 apparently does.
This section from the SDK overview is ambiguous, since it doesn't say
how Motion corrected this problem:
Float Images pixelFormat Correction
Motion 2.1 ordered pixel components RGBA in floating-point images, but
the -pixelFormat method
returned ARGB. Motion 3 corrects this problem. You can determine
whether floating-point images
are mislabeled by querying [FxHostCapabilities
formatsFloatRGBABitmapsAsARGB].
I assume that Motion 3 corrected this problem by changing the
component order to ARGB, since that's what I'm seeing in the
FxBitmaps, but I don't see any mislabeling. As in my previous message,
it seems very odd to me that Motion would switch from RGBA to ARGB
float pixels, especially since Quartz doesn't support float ARGB.
Any explanations would be greatly appreciated.
- Stoney
--
Stonewall Ballard
email@hidden http://stoney.sb.org/
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