On 5/24/13, Mukund Sivaraman <muks@xxxxxxxx> wrote: > The following file plug-ins have been revised to use GIMP's new API. > I feel they need more testing as the changes are intrusive and the file > types can support a variety of pixel formats. I have tested these to my > satisfaction. Please test these if you can (master branch). > * file-tiff-save (test saving grayscale, RGB and indexed TIFF files > incl. 16-bits per channel in the case of non-indexed) Tiff vary a bit in their internal structure, depending on which software generates the tiff, yes? So I'm planning on testing tiffs from several sources. I'm using Gentoo Linux. I rebuilt babl, gegl, and Gimp 2.9 from git this morning. So far I've tested some old 8-bit and 16-bit single layer tiffs that were created using Photoshop CS2 under Windows 2K (I did say old!): *8-bit and 16-bit color tiffs opened and exported properly; I was able to open the exported files with showFoto and each file looked right and had its appropriate bit depth. *converting 8-bit tiff to 16-bit tiff and exporting worked. *converting tiff to indexed and exporting worked. *converting 8-bit and 16-bit color tiffs to grayscale and exporting worked; the exported file opened with showFoto and looked exactly as expected. However, opening the exported 8-bit and 16-bit color-to-grayscale tiffs (that Gimp has just exported) with Gimp instead of showFoto didn't work. The images were too light in tonality, looked like they had been given a gamma 2.2ish correction. Upon exporting the newly opened grayscale image under a new name, the exported image then was also wrong in showFoto (showFoto can't actually work with or save grayscale image, instead converts to RGB before displaying the image). *Tiffs can support multiple layers and higher than 16-bit precision, which is not to say that Gimp is obligated to support these options. Exporting a two-layer tiff didn't work. Only one layer was exported and only about a third of the image on that layer was exported properly. Also changing precision to 32-bit floating point and exporting as a tiff resulted in a 16-bit tiff. Elle _______________________________________________ gimp-developer-list mailing list gimp-developer-list@xxxxxxxxx https://mail.gnome.org/mailman/listinfo/gimp-developer-list
