[texworks] JPEG rendering problem

[Alain Delmotte]

Hi!

I retested with the different versions I have (working under Windows XP):
r132, r161 and r238 give a ping background for the images in the preview,
r252 (which I compiled following the instructions of Stefan) doesn't.

*But* the background is only for .jpeg images, a .png will not have the 
background in the different releases.

This background appears only within TeXworks and not in a viewer (Adobe 
Reader, PDFXChange tested) as it shouldn't because the picture has no 
background (well perhaps a white one for the graph).
In my point of view there should not be a background, unless one finds 
some use (size of the area used by the picture?) for it in developing a 
document.

Herb Sculz:
 > Hmmmm... Opening the pdf file produced by compiling the test file shows
 > Black and the correct background color in both Preview (& TeXShop) and
 > Adobe Reader. But it shows the distorted colors in TeXWorks (last 
released binary).

What is the "correct background"?
I think the background should be white or none (the paper behind); the 
picture files themself do not have a background colour and there are no 
instructions to get a background in the file received:
\begin{document}

\centering

\includegraphics[width=5cm]{lines-part} \\[\bigskipamount]

\includegraphics[width=10cm]{D62A60Z144}

\end{document}


Alain

 
Jonathan Kew a écrit :
> I believe this is an issue of the poppler library version; the problem 
> exists with the version in the "libraries" download but has been fixed 
> in more recent poppler source. So a library update is needed.
>
> JK
>
> On 26 Jan 2009, at 17:47, Herbert Schulz wrote:
>
>>
>> On Jan 26, 2009, at 10:44 AM, Alain Delmotte wrote:
>>
>>> Hi,
>>>
>>> Testing with the files in the archive it is normal to get the 
>>> TeXworks result.
>>> I got exactly the same under Windows with r252.
>>> In fact the two pictures you sent have the colours seen with 
>>> TeXworks; the TeXshop result is apparently not created with the sent 
>>> .jpeg files.
>>> Try to open the .jpeg files with a viewer.
>>>
>>> Alain
>>>
>>
>>
>> Howdy,
>>
>> Hmmmm... Opening the pdf file produced by compiling the test file 
>> shows Black and the correct background color in both Preview (& 
>> TeXShop) and Adobe Reader. But it shows the distorted colors in 
>> TeXWorks (last released binary).
>>
>> Good Luck,
>>
>> Herb Schulz
>> (herbs at wideopenwest dot com)
>>
>>
>>
>
>