lib for rotating jpeg's

[uli]

Hi all!

I'm searching for a (small) free library for handling JPEG's. Especially I
want to load one JPG figure and just rotate it.
I have seen the 'Independent JPEG Group' in the Web, but their lib seemed a
little overcharged for me. I didn't take a closer look on it yet.

Before that I want to ask, if someone of you knows of small and free jpeg
libs?!
(Also other lib's like for C++ or perhaps Fortran would be interesting, but
OS independed)
Thanx in advance for any link!

Regards,
uli

 

[Arthur J. O'Dwyer]

I'm searching for a (small) free library for handling JPEG's. Especially I
want to load one JPG figure and just rotate it.
I have seen the 'Independent JPEG Group' in the Web, but their lib seemed a
little overcharged for me. I didn't take a closer look on it yet.

Before that I want to ask, if someone of you knows of small and free jpeg
libs?!

http://www.google.com/search?q=jpeg+library+c+source.code
http://www.google.com/search?q=small+free+jpeg+library

Try asking in a group where image manipulation is topical. If
you really can't find one AFTER LOOKING FOR ONE, then try
comp.programming. comp.lang.c is for questions about the C
programming language only; we don't do JPEG libraries.

-Arthur

 

[Jim]

Hi all!

I'm searching for a (small) free library for handling JPEG's. Especially I
want to load one JPG figure and just rotate it.

After loading a JPG (or any other type of file) in memory, what you have is
a bitmap. So, you don't need a JPG library to rotate, but
you definitely need a library to do the decompression.
Jim

 

[Arthur J. O'Dwyer]

After loading a JPG (or any other type of file) in memory, what you have
is a bitmap. So, you don't need a JPG library to rotate, but
you definitely need a library to do the decompression.

See, this is why you aren't supposed to post OT stuff to comp.lang.c:
because *invariably* somebody will take it upon themselves to give a
wrong answer. FYI, JPEG is a lossy image format, and it has support for
lossless rotation (so decompressing to an approximated "bitmap" is
precisely what the OP does *NOT* want to do).

The OP needs to post to an appropriate newsgroup.

-Arthur

 

[Martin Dickopp]

I'm searching for a (small) free library for handling JPEG's. Especially I
want to load one JPG figure and just rotate it.
I have seen the 'Independent JPEG Group' in the Web, but their lib seemed a
little overcharged for me. I didn't take a closer look on it yet.

Your question is not about the C language and therefore off-topic here.

<OT>
That said, I would indeed recommend the library from the Independent
JPEG Group. Note that it comes with code to rotate JPEGs by an integer
multiple of pi/2 (i.e. 90 degrees) *losslessly*.
</OT>

Martin