On 10/02/2010 11:17 AM, Piscium wrote: > 2010/10/1 Vladimir 'φ-coder/phcoder' Serbinenko <phco...@gmail.com>: > > >> On 10/01/2010 08:55 PM, Piscium wrote: >> > >>> The conclusion appears to be that the jpeg module in grub2 is very >>> fussy about the files that it displays. Note there was nothing special >>> about the files I wanted to display. The "green_mountains" was taken >>> from a blog, and the two 1280x1024 images were taken from the Gnome >>> Art website. >>> >>> > >> It's not really "nothing particular". With pictures taken by my camera >> it works fine. >> > The site I mentioned, Gnome Art is this: > http://art.gnome.org/backgrounds > > It is where some people come to get nice background images, and not > just Gnome users. For example, in my Windows PC at work I have a > background from this site. This isn't a place for advertisement. > So it would be good if pictures from this > site could be displayed with grub2. They are just normal pictures. > > In fact I think the site could be used as a test resource for the > grub2 background image feature, as it has images created by various > people in various sizes and with various cameras and software > packages. > > > >>> There is a file grub-core/video/readers/jpeg.c. It has plenty of debug >>> statements like: >>> "grub_error (GRUB_ERR_BAD_FILE_TYPE, "jpeg: huffman decode fails"); >>> >>> Is there some easy way to read the text of these messages? (I have no >>> JTAG and my hardware does not support virtualization). >>> >>> >>> >> They aren't debug messages but error messages which are shown if you >> call background_image manually. >> > By loading the image files manually on the command line I got this > error message for both problem files: > "jpeg: invalid 0xFF in data stream" > > This is very insightful. The issue is because of optional (and useless) padding in jpeg. I know how to fix it but is too tired right now (admiring beauties of my country takes sometimes effort) > This comes from jpeg.c, line 124. > > I have created a bug report as you requested, unfortunately I could > not attach the said files as they exceed the site limit. If you want I > can email the files to you or upload to some temporary place of your > choice. (The file sizes are 2.1 Mb and 577 Kb). > > _______________________________________________ > Grub-devel mailing list > Grub-devel@gnu.org > http://lists.gnu.org/mailman/listinfo/grub-devel > >
-- Regards Vladimir 'φ-coder/phcoder' Serbinenko
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