Arch Linux

Since libjpeg-turbo 1.5.2, tiff2pdf can no longer create PDF files, failing with the error "Backing store not supported". libjpeg-turbo 1.5.1 works fine.

I raised a bug upstream[1] and this is an issue where libtiff is setting a hard memory limit of 10MB, which until 1.5.2 libjpeg-turbo was ignoring. Now it is respecting the option, tiff2pdf can't create PDFs as there isn't enough memory.

libjpeg-turbo doesn't consider it their problem (they are doing what was asked) so the solution is to raise the libtiff limit, which looks like it can be done[2] by defining TIFF_JPEG_MAX_MEMORY_TO_USE to be a value larger than 10MB.

I would like to request Arch set it to 128MB or larger during compilation so that large PDF files can be created, restoring the previous behaviour (which was to ignore any memory limit.)

Steps to reproduce:

tiff2pdf -j -q 75 scan.tif > out.pdf

[1]: https://github.com/libjpeg-turbo/libjpeg-turbo/issues/162
[2]: https://github.com/vadz/libtiff/blob/master/libtiff/tif_jpeg.c#L2434-L2443