Mobile Safari scales grayscale png incorrectly

Originator:dairgrant
Number:rdar://9653945 Date Originated:22-Jun-2011
Status:Open Resolved:
Product:Mobile Safari Product Version:iOS 4.3.3
Classification:Other Bug Reproducible:Always
 
Summary:
The attached image (a gray+alpha png) renders incorrectly when reduced in size by Mobile Safari (iPad 1 running iOS 4.3.3).

Steps to Reproduce:
View the attached grayscale.png image on a web page using Safari on the iPad.

Expected Results:
The image should look the same when reduced in size, at its normal size, and when expanded in size.

Actual Results:
The image looks incorrect when reduced in size (examples included in attachment).

Regression:

Notes:
The bug can be seen by viewing this page on an iPad:

  http://www.refnum.com/personal/radar/9653945/index.html

The effects of the bug can be seen by viewing these two images on any platform:

  http://www.refnum.com/personal/radar/9653945/error1.png
  http://www.refnum.com/personal/radar/9653945/error2.png

Comments


Please note: Reports posted here will not necessarily be seen by Apple. All problems should be submitted at bugreport.apple.com before they are posted here. Please only post information for Radars that you have filed yourself, and please do not include Apple confidential information in your posts. Thank you!