340175 - PNG8 with tRNS is misrendered

Status: RESOLVED WORKSFORME

(Core :: Graphics: ImageLib, defect)

Description

[[e-mail]]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.1) Gecko/20060111 Firefox/1.5.0.1
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.1) Gecko/20060111 Firefox/1.5.0.1

I just lost an hour of my life because of this damn bug. It seems ff uses only the tRNS palette when rendering PNGs that include them. That is, the image is transparent and black... no color.

Reproducible: Always

Actual Results:  
A 2-bit image with transparent background
http://web.mit.edu/belg4mit/Public/tRNS.png

Expected Results:  
A color image with transparent background

I don't have root here so I could not upgrade to 1.5.0.4 to test, although I have report of the image displaying correctly under 1.5.0.3 on Linux.

Comment 1

[[e-mail]]

Attachment: PNG with tRNS

Comment 2

[[e-mail]]

Attachment: Screenshot of misrendering

Comment 3

[[e-mail]]

> Actual Results:  
> A 2-bit image with transparent background
> http://web.mit.edu/belg4mit/Public/tRNS.png
This should have been http://web.mit.edu/belg4mit/Public/tRNSshot.png

Comment 4

[Jesse Ruderman]

WFM Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.9a1) Gecko/20060602 Minefield/3.0a1, I see colored rectangles when I load the PNG.

Comment 5

[Alfred Kayser]

This is probably fixed somewhere in the dark ages... Marking as WORKSFORME.