Re: [pygtk] converting an Numeric array to a Pixbuf
On Wed, 2003-07-30 at 11:45, Christian Reis wrote: On Tue, Jul 29, 2003 at 09:27:45AM +1200, Tim Evans wrote: Anthony Joseph Seward wrote: I am trying to figure out a simple way of converting a Numeric array to a gtk.gdk.Pixbuf without depending on PIL. [snip] Assuming that you have a (n,m,3) or (n,m,4) shape 'b' type array of RGB or RGBA values called 'data', you would do this: w,h = data.shape[:2] hasalpha = shape.shape[3] == 4 p = gtk.gdk.Pixbuf(gtk.gdk.COLORSPACE_RGB, hasalpha, 8, w, h) p.pixel_array[:] = data Added as FAQ 8.3, thanks: http://www.async.com.br/faq/pygtk/index.py?req=showfile=faq08.003.htp Take care, The PyGTK reference at http://www.moeraki.com/pygtkreference/pygtk2reference/class-gdkpixbuf.html says Attributes pixel_array Read A numeric ... So according to the reference pixel_array is a read only attribute. Is the reference in error? Tony -- Anthony Joseph Seward [EMAIL PROTECTED] ___ pygtk mailing list [EMAIL PROTECTED] http://www.daa.com.au/mailman/listinfo/pygtk Read the PyGTK FAQ: http://www.async.com.br/faq/pygtk/
Re: [pygtk] converting an Numeric array to a Pixbuf
On Wed, 2003-07-30 at 11:45, Christian Reis wrote: On Tue, Jul 29, 2003 at 09:27:45AM +1200, Tim Evans wrote: Anthony Joseph Seward wrote: I am trying to figure out a simple way of converting a Numeric array to a gtk.gdk.Pixbuf without depending on PIL. [snip] Assuming that you have a (n,m,3) or (n,m,4) shape 'b' type array of RGB or RGBA values called 'data', you would do this: w,h = data.shape[:2] hasalpha = shape.shape[3] == 4 p = gtk.gdk.Pixbuf(gtk.gdk.COLORSPACE_RGB, hasalpha, 8, w, h) p.pixel_array[:] = data Added as FAQ 8.3, thanks: http://www.async.com.br/faq/pygtk/index.py?req=showfile=faq08.003.htp Take care, The PyGTK reference at http://www.moeraki.com/pygtkreference/pygtk2reference/class-gdkpixbuf.html says Attributes pixel_array Read A numeric ... So according to the reference pixel_array is a read only attribute. Is the reference in error? Tony -- Anthony Joseph Seward [EMAIL PROTECTED] ___ pygtk mailing list [EMAIL PROTECTED] http://www.daa.com.au/mailman/listinfo/pygtk Read the PyGTK FAQ: http://www.async.com.br/faq/pygtk/
Re: [pygtk] converting an Numeric array to a Pixbuf
p.pixel_array[:] = data The PyGTK reference at http://www.moeraki.com/pygtkreference/pygtk2reference/class-gdkpixbuf.html says Attributes pixel_array Read A numeric ... So according to the reference pixel_array is a read only attribute. Is the reference in error? The 'pixel_array' attribute is read-only in that you can't do 'p.pixel_array = data'. But it's not immutable, so you can still change it's contents, which is what the [:] slice assignment does. The reference could probably make this more clear. -- Tim Evans Applied Research Associates NZ http://www.aranz.com/ ___ pygtk mailing list [EMAIL PROTECTED] http://www.daa.com.au/mailman/listinfo/pygtk Read the PyGTK FAQ: http://www.async.com.br/faq/pygtk/
Re: [pygtk] converting an Numeric array to a Pixbuf
On 1/08/2003 4:46 AM, Anthony Joseph Seward wrote: On Wed, 2003-07-30 at 11:45, Christian Reis wrote: On Tue, Jul 29, 2003 at 09:27:45AM +1200, Tim Evans wrote: Anthony Joseph Seward wrote: I am trying to figure out a simple way of converting a Numeric array to a gtk.gdk.Pixbuf without depending on PIL. [snip] Assuming that you have a (n,m,3) or (n,m,4) shape 'b' type array of RGB or RGBA values called 'data', you would do this: w,h = data.shape[:2] hasalpha = shape.shape[3] == 4 p = gtk.gdk.Pixbuf(gtk.gdk.COLORSPACE_RGB, hasalpha, 8, w, h) p.pixel_array[:] = data Added as FAQ 8.3, thanks: http://www.async.com.br/faq/pygtk/index.py?req=showfile=faq08.003.htp Take care, The PyGTK reference at http://www.moeraki.com/pygtkreference/pygtk2reference/class-gdkpixbuf.html says Attributes pixel_array Read A numeric ... So according to the reference pixel_array is a read only attribute. Is the reference in error? You can't set the pixel_array attribute, but you can modify the existing value. Note however that modifying the pixel data of some GdkPixbufs will cause a segfault (ones that are backed by a const string, such as the stock icons). Pixbufs you create yourself are safe to modify though. James. -- Email: [EMAIL PROTECTED] WWW: http://www.daa.com.au/~james/ ___ pygtk mailing list [EMAIL PROTECTED] http://www.daa.com.au/mailman/listinfo/pygtk Read the PyGTK FAQ: http://www.async.com.br/faq/pygtk/
Re: [pygtk] converting an Numeric array to a Pixbuf
Tim Evans wrote: [snip] I'm not sure about 1.99.14, but 1.99.16 can be compiled with Numeric support. If it is you can create a Pixbuf by modifying the array returned be accessing the 'pixel_array' attribute of an existing pixbuf. Assuming that you have a (n,m,3) or (n,m,4) shape 'b' type array of RGB or RGBA values called 'data', you would do this: w,h = data.shape[:2] hasalpha = shape.shape[3] == 4 p = gtk.gdk.Pixbuf(gtk.gdk.COLORSPACE_RGB, hasalpha, 8, w, h) p.pixel_array[:] = data I just noticed that the above is only working because of luck. The width and height of the pixbuf were being put in the array dimensions in the wrong order. In some cases this can even cause a segfault. See http://bugzilla.gnome.org/show_bug.cgi?id=118839 for a patch. -- Tim Evans Applied Research Associates NZ http://www.aranz.com/ ___ pygtk mailing list [EMAIL PROTECTED] http://www.daa.com.au/mailman/listinfo/pygtk Read the PyGTK FAQ: http://www.async.com.br/faq/pygtk/
Re: [pygtk] converting an Numeric array to a Pixbuf
On Tue, Jul 29, 2003 at 09:27:45AM +1200, Tim Evans wrote: Anthony Joseph Seward wrote: I am trying to figure out a simple way of converting a Numeric array to a gtk.gdk.Pixbuf without depending on PIL. [snip] Assuming that you have a (n,m,3) or (n,m,4) shape 'b' type array of RGB or RGBA values called 'data', you would do this: w,h = data.shape[:2] hasalpha = shape.shape[3] == 4 p = gtk.gdk.Pixbuf(gtk.gdk.COLORSPACE_RGB, hasalpha, 8, w, h) p.pixel_array[:] = data Added as FAQ 8.3, thanks: http://www.async.com.br/faq/pygtk/index.py?req=showfile=faq08.003.htp Take care, -- Christian Reis, Senior Engineer, Async Open Source, Brazil. http://async.com.br/~kiko/ | [+55 16] 261 2331 | NMFL ___ pygtk mailing list [EMAIL PROTECTED] http://www.daa.com.au/mailman/listinfo/pygtk Read the PyGTK FAQ: http://www.async.com.br/faq/pygtk/
[pygtk] converting an Numeric array to a Pixbuf
I am trying to figure out a simple way of converting a Numeric array to a gtk.gdk.Pixbuf without depending on PIL. I am having a hard time finding documentation on how to make an RGB XPM file or even if it is possible. gdk_pixbuf_new_from_data seems like is what I want, but it does not appear to be wrapped in pygtk 1.99.14. Any suggestions? Tony -- Anthony Joseph Seward [EMAIL PROTECTED] ___ pygtk mailing list [EMAIL PROTECTED] http://www.daa.com.au/mailman/listinfo/pygtk Read the PyGTK FAQ: http://www.async.com.br/faq/pygtk/
Re: [pygtk] converting an Numeric array to a Pixbuf
On Mon, Jul 28, 2003 at 01:55:42PM -0600, Anthony Joseph Seward wrote: gdk_pixbuf_new_from_data seems like is what I want, but it does not appear to be wrapped in pygtk 1.99.14. Any suggestions? IIRC it's wrapped in CVS HEAD. Give it a go. Take care, -- Christian Reis, Senior Engineer, Async Open Source, Brazil. http://async.com.br/~kiko/ | [+55 16] 261 2331 | NMFL ___ pygtk mailing list [EMAIL PROTECTED] http://www.daa.com.au/mailman/listinfo/pygtk Read the PyGTK FAQ: http://www.async.com.br/faq/pygtk/
