Hi João, What's your timeframe for modifying pygimp to use introspection? I have not yet built glib and friends with introspection because it's a pain and it's finicky. :) Thanks, Partha On Fri, Feb 20, 2015 at 11:54 PM, Joao S. O. Bueno <gwidion@xxxxxxxxx> wrote: > Hi - > I've actually comitted the above method - but beware it is subject to > some changes. > > I've added the "precision" read-only property to gimp-images, and the > "get_data" method > to drawables (layers and channels) - > get_data returns a Python array.array object - it even features > conveninent methods > to write itself to a file (https://docs.python.org/2/library/array.html) - > For now, it takes an optional string argument representing a BABL pixel format > (http://gegl.org/babl/BablFishPath.html) and will return an array of > the apropriate data type. > The default is "RGBA float" - but I think it would be better to change > it to default to the > drawable native data type- still allowing an explicit format to be passed. > > > I will probably keep it the return type an array, but possibly > subclass it to an object that can > take in 2D indexes to ease pixel access, as currently existing python > "pixel_region" object allows > (thus: data[100, 50] will be as valid as data[50 * drawable.width + > 100] to get to a single pixels. > > On the short term roadmap there is a "set_data" - (or maybe "blit ")? > > And at the point in time it is possible to use gobject introspection along > pygimp (it can't be done in a straightforward way), make > drawable.get_buffer directly available and returning a Gegl buffer > wrapped in a convenient Python object. > > On 21 February 2015 at 00:49, Joao S. O. Bueno <gwidion@xxxxxxxxx> wrote: >> Getting there... no need to poke me for now - >> >> GIMP 2.9.1 Python Console >> Python 2.7.5 (default, Nov 3 2014, 14:26:24) >> [GCC 4.8.3 20140911 (Red Hat 4.8.3-7)] >>>>> img = gimp.image_list()[0] >>>>> a = img.layers[0].get_data() >>>>> len(a) >> 1228800 >>>>> a[0:300] >> array('f', [0.0003035269910469651, 0.0003035269910469651, >> 0.0003035269910469651, 0.6235294342041016, 0.0003035269910469651, >> 0.0003035269910469651, 0.0003035269910469651, 0.6235294342041016, >> 0.0003035269910469651,...] >> >> On 20 February 2015 at 09:50, Joao S. O. Bueno <gwidion@xxxxxxxxx> wrote: >>> 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 _______________________________________________ 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
