Old-style JPEG compression support is not configured.

[atesz17]

Hi!

I'd like to open tiff files using your library, however I face the following error message. Could you tell me how I can configure your library to use this old-style JPEG compression?

Thanks in advance

[seikichi]

Hi @atesz17,

Sorry, this library does not support JPEG-based compressed TIFF files (
I failed to link a JPEG library ... ;-p)

[atesz17]

Okay, thanks for the answer :)

Do you have any tips on dealing with JPEG-based compressed tiff files maybe?

[aabdelsamad]

Hi Seiichi.
Could you please tell me the problems that you faced when linking a JPEG library. I will could also try to do the linking ?
Perhaps me and @atesz17 can both contribute this part.

[seikichi]

@aabdelsamad @atesz17

Sorry for the too late response.

To be honest, I don't remember well what was the problem. Sorry...
I've tried to link libjpeg library as with zlib library in build.sh, but failed (I can't remember what problem had occured).

I think that by using the latest libjpeg and emscripten, it might be different results ...

[Tetedeiench]

Hello,

I had the same issue and could make a working version of the build.sh script linked against the latest libJPEG. I could successfully load JPEG-encoded TIFF files using it.

I sent the build script to seikichi by email, and i'm putting it here.

It isn't 100% working : the automatic build of the libjpeg library fails for some reason i haven't been able to find.

Until then, just run the script, and if it fails at building the jpeg library, run "emmake make clean", then the emconfigure / emmake lines manually, they'll work. Next, Comment those two lines in the script, and restart - you'll get through.

I included the output i had in the zip file if you want to try it out.

Keep in mind i learned about emscripten yesterday, and that you should thoroughly test this script out before using it.

tiff.jpeg.zip

[seikichi]

Thanks @Tetedeiench !!!!! 🙇 🙇 (cc: @aabdelsamad @atesz17 )

Thanks to your scripts, I could successfully build LibTIFF with libjpeg.
I updated demo pages with new tiff.js (demo1, demo2).

I'll update this library on this weekend (working branch is here). Thank you!

[Tetedeiench]

I just did the compiling of libjpeg, you're the one to thank for the project as a whole... Thank you friend !

I'm just happy my work can be of use to others !