What does yellow tinting represent when using "color misaligned images" on iPhone/iOS

Question

so--i switched on "color misaligned images" to improve drawing performance in our app. The documentation states:

Puts a magenta overlay over images whose source pixels aren't aligned to destination pixels

I don't know what the yellow means however. (There is a "Color Offscreen-Rendered" option that uses yellow... does "Color Misaligned Images" also turn on this option?)

Anybody know?

TIA

Wilbur Vandrsmith · Accepted Answer · 2011-06-10T20:07:35.520

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Magenta overlays are caused by subpixel misalignment, while yellow overlays are caused by stretching. Prior to iOS 4, Instruments used magenta for both.

edited Jun 10 '11 at 20:07

answered Jun 10 '11 at 04:50

Wilbur Vandrsmith

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Not in the textual documentation that I know of, but it’s mentioned about 50 minutes into _Core Animation in Practice, Part 2_ from the WWDC 2010 session videos. – Wilbur Vandrsmith Jun 10 '11 at 20:05
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Link to "Core Animation in Practice, Part 2" and Part 1: – Vincent Gable Aug 23 '11 at 16:03
Odd - noticed the Status bar shows up yellow when you do choose this option (and with no app open). – Snowcrash Jun 28 '12 at 12:20
@SnowCrash When these overlays are active they work device-wide; even in other apps or SpringBoard. – Wilbur Vandrsmith Jun 28 '12 at 23:06
@Wilbur - does that mean the Status bar has misaligned pixels? – Snowcrash Jul 16 '12 at 18:24
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@SnowCrash Not misaligned, but stretched. UI elements that repeat exactly in one direction are often stretched from a 1xN sized image. – Wilbur Vandrsmith Aug 17 '12 at 04:41

What does yellow tinting represent when using "color misaligned images" on iPhone/iOS

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