# [texworks] JPEG rendering problem

Alain Delmotte esperanto at swing.be
Tue Jan 27 15:31:50 CET 2009

Hi!

Sorry for my comments, I took the picture of Bruno Voisin the wrong way:
the TeXworks is on the *right* with a background (as he mentioned in his
message) and TeXshop on the left normal without background (but above
it, is the menu bar showing TeXworks - so I took the left part as TeXworks).

Would you like to have the files which work for me on Windows XP to
Sorry I can not compile for the Mac.

Alain

Jonathan Kew a écrit :
> On 27 Jan 2009, at 13:42, Alain Delmotte wrote:
>
>> 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.
>
> I believe this is because you are using a different (newer) version of
> the poppler library with your self-compiled version.
>
> JK
>
>>
>>
>> *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
>> 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)
>>>>
>>>>
>>>>
>>>
>>>
>>
>
>