Hi all, Now I'm drafting the patch to emit the images coded by CCITT via CairoOutputDev without reencoding it. From the surface independence and portability, I think using TIFF is good to pass CCITT image to Cairo. When I encapsulate CCITT bitstream into TIFF format, I need to put the metrics infos (CCITT bitstream itself does not have it, TIFF must have it). There are 2 different metrics infos may exist in PDF (Width/Height in Image dictionary and Columns/Rows in DecodeParms dictionary). There is a possibility that these properties are inconsistent. I'm not sure how I should deal such case.
I did a small experiments with some data with inconsistent metrics, and I found that popular PDF browsers show different behaviours for such cases. Thus I think the inconsistent metrics should cause some errors. My experiment is summarized at http://gyvern.ipc.hiroshima-u.ac.jp/~mpsuzuki/pdf-tech/ImagesWithIncorrectMetrics.html If you have a comment how inconsistent metrics should be dealt, please let me know. Regards, mpsuzuki _______________________________________________ poppler mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/poppler
