40916 - PNG + alpha channels

Status: VERIFIED DUPLICATE of bug 36694

(Core :: Graphics: ImageLib, enhancement, P3)

Description

[Turbo]

Hi there...

I'm using Mozilla 5.0.16.2000052921. I tested the 8-bit transparency channel in 
PNG-image. Maybe Corel saves the transparency in a wrong way - the 
transparency-channel should be 8-bit but image itself is 24-bit - maybe Corel 
can't handle this difference. (I supposed that the transparent areas for PNG 
work like those for GIF - what is selected in Corel is transparent in browser.)
Can You make the alpha-blended images go work ?

Good luck

Comment 1

[rubydoo123]

I believe this should go to pnunn -- Pam, if I'm wrong, please reassign as 
appropriate.

Comment 2

[pnunn]

Michal: 
I'm not sure what your question is.
If you are having a problem with png
alpha channels, could you attach a test
image? or give me an url that has test images?

thanks,
pn

Comment 3

[pnunn]

Can't continue with out more info.
-P

Comment 4

[Eli Goldberg]

No follow-up received from reporter. Verifying as invalid. 

Comment 5

[Eli Goldberg]

Michal apparently e-mailed images to Pam, rather than attaching the files here, 
so nobody saw the images or knew they were being sent.

I'm re-opening the bug.

Comment 6

[Turbo]

Attachment: Test Image (Alpha-Blended PNG file)

Comment 7

[Turbo]

Attachment: What i see in mozilla...

Comment 8

[Turbo]

Attachment: What I wanna see :) "please" :)

Comment 9

[pnunn]

duplicate of 36694.
Try a build after 07-10-00. 
-p

*** This bug has been marked as a duplicate of 36694 ***

Comment 10

[Eli Goldberg]

Verifying as duplicate. I'll be sure to check this test case when verifying 
36694, of course.

Comment 11

[tor]

Attachment: correct output of test case

Comment 12

[tor]

Your desired output doesn't match the PNG used in the testcase, but seems to
be produced from a PNG with an inverted alpha channel.  The output of running
mozilla on X11 with the test is attached.  This also matches what gimp thinks
the alpha composite of that PNG should be.

Comment 13

[Hixie (not reading bugmail)]

The Image Conversion Library component is going away.