184430 - transparency of png-images (probably gif, too) is ignored while printing

Status: VERIFIED DUPLICATE of bug 141656

(Core :: Printing: Output, defect)

Description

[joern.huxhorn]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.2.1) Gecko/20021130
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.2.1) Gecko/20021130

The transparent pixels of png's are always white instead of the color of the
underlying background. The images I used are palette-based.

Reproducible: Always

Steps to Reproduce:
<div class="example">
<img src="imgs/someImage.png" alt="someDescription" />
</div>

with the following style-information:
div.example
{
	clear: both;
	float: right;
	margin-left: 10px;
	margin-top: 10px;
	margin-right: 0px;
	margin-bottom: 10px;
	padding-top: 0em;
	padding-right: 1em;
	padding-left: 1em;
	padding-bottom: 1em;
	border: solid medium;
	color: #000000;
	background-color: #dddddd;
}

Actual Results:  
The div itself has a gray background but the background of the image is white
instead (probably just in my case... could be that some other color may be
choosen for different png's).

Expected Results:  
The transparent pixels should have the same color as the background of the div
like in the ordinary view of the page. It's only wrong while printing.

A workaround would be to change the background-color of the div for media="print"

Comment 1

[rods (gone)]

-->

Comment 2

[Bryan Roseberry]

I also have similar problems with this when printing transparent GIFs. The
background image (CSS-rendered background image) shows up onscreen and in the
Print Preview, but not on the printed hard copy.

Go to http://www.public.asu.edu/~aubjr/one/temp_a.html and print the template
(including background images) for a sample of this problem.

Comment 3

[Boris Zbarsky [:bzbarsky]]

*** This bug has been marked as a duplicate of 141656 ***

Comment 4

[sujay]

verified.