Hi Alek_ it turns out that the Python bindings for GIMP had not been updated to deal with higher precision images as of yet. Don't despair - since you had built GIMP master, this is as good time as any to get it going. :-) You can get to know the image precision (and even set it) thorugh the PDB, though, with a call to: pdb.gimp_image_get_precision Now - for the actual business: I think there are two ways to go - one short term, with a "get" and "set" buffer method on Python drawables that will just copy the inner image data and make it available in a Python array. That would suffice for most needs like yours, I guess. The other, longer term and proper way, is to write calls to get the proper GEGL Buffer objects in Python, using GEGL Python bindings - that will allow the use of any of GEGL's operations on GIMP Image data and commit it back - but it will also require the python-gegl package. Those bindings are currently living in my personal repo, and could work for you right now, as they do allow access to the buffer data - but you have to build GEGL with the extra "--enable-introspection" switich to get then going. (http://github.com/jsbueno/python-gegl ) But -- let's focus in enabling one to get the high-depth pixel contents from GIMP without need for those for now. Feel free to poke me again in 24 hours if there are no news on this subject. js -><- On 19 February 2015 at 23:06, Alek _ <spectatoe@xxxxxxxxxxx> wrote: > > > > I'm using Gimp 2.9 experimental build, which I downloaded from > partha.com, to specifically have edit ability with 16-bit per channel > images. I originally posted in gimpforums.com and was told I should try here. > > > > I'm trying to write a Python plugin to export an image as a raw file > (just data, no header). The current option to export as raw image data > (File -> Export as -> Raw image data) seems to only support writing out as 8-bit even when the image precision > is greater than 8-bit. So I wanted to write a plugin so I could export > my 16-bit per channel image to a raw file with the 16-bit data > preserved. > > My image is a 16-bit grayscale 3x3 image with a checkerboard pattern of alternating white and black pixels. > > > > I used the sample script 'test-discolour-layer-v4.py' from http://registry.gimp.org/node/28124 > as a guide on how to iterate through every pixel. I have some > questions and ran into some problems. What I have so far can be seen here (http://pastebin.com/U49VZYVT). It just iterates through the pixels and outputs values to the > error console. > > > > 1. How do I query for the precision? That is, I want to know if the > current image is 8-bit gamma integer, or 16-bit linear integer, or > something else. I looked at the image object's attributes and didn't > find anything. > > > > 2. When I get the pixel value from srcTile[x,y], the value is always > 8-bit. With the white pixels, the value should be 65535 but I got 255. How do I get the > proper value? When I use the Color Picker tool with info window, it says 65535 for white. How do I get that value? > > > > 3. My code creates a new layer from visible and then queries the pixels from that. In my image, all values returned are 255 even for the black pixels. When I put my checkboard pattern on the Background layer and query that layer, I get correct values (though in 8-bit). For any other layer other than Background, the values are always 255. I don't know what I'm doing wrong. > > > Can someone help me or point me in the right direction? > > Thanks. > > _______________________________________________ > gimp-developer-list mailing list > List address: gimp-developer-list@xxxxxxxxx > List membership: https://mail.gnome.org/mailman/listinfo/gimp-developer-list > List archives: https://mail.gnome.org/archives/gimp-developer-list _______________________________________________ gimp-developer-list mailing list List address: gimp-developer-list@xxxxxxxxx List membership: https://mail.gnome.org/mailman/listinfo/gimp-developer-list List archives: https://mail.gnome.org/archives/gimp-developer-list
