There is a verb readimg in jgtk. It shows how to read the pixels using memr.
Пт, 26 апр 2013, Emir Ustamujic писал(а): > Hello, > > I have been looking at a tutorial for image processing (implemented in C and > GTK : http://gtkbook.sourceforge.net/improc/node6.html) and have some jgtk > code which works fine for getting some information from an image : > > //FUNCTIONS > > gdk_pixbuf_new_from_file =: ((>libgtk), ' gdk_pixbuf_new_from_file > x *c > x')&cd > gdk_pixbuf_get_height =: ((>libgtk), ' gdk_pixbuf_get_height > x x')&cd > gdk_pixbuf_get_width =: ((>libgtk), ' gdk_pixbuf_get_width > x x')&cd > gdk_pixbuf_get_bits_per_sample =: ((>libgtk), ' > gdk_pixbuf_get_bits_per_sample > x x')&cd > gdk_pixbuf_get_rowstride =: ((>libgtk), ' gdk_pixbuf_get_rowstride > x x')&cd > gdk_pixbuf_get_n_channels =: ((>libgtk), ' gdk_pixbuf_get_n_channels > x > x')&cd > gdk_pixbuf_get_pixels =: ((>libgtk), ' gdk_pixbuf_get_pixels > x x')&cd > > > //CODE > > mypixbuf =: gdk_pixbuf_new_from_file > '/home/emir/j701/addons/demos/gtk/felidae/data/lion.jpg';0 > > imgheight =: gdk_pixbuf_get_height mypixbuf > smoutput 'Image Height:' > smoutput imgheight > > imgwidth =: gdk_pixbuf_get_width mypixbuf > smoutput 'Image Width:' > smoutput imgwidth > > bps =: gdk_pixbuf_get_bits_per_sample mypixbuf > smoutput 'Bits Per Sample:' > smoutput bps > > rowstride =: gdk_pixbuf_get_rowstride mypixbuf > smoutput 'Rowstride:' > smoutput rowstride > > n_channels =: gdk_pixbuf_get_n_channels mypixbuf > smoutput 'n_channels:' > smoutput n_channels > > pixelspointer =: gdk_pixbuf_get_pixels mypixbuf > smoutput 'Pixels pointer:' > smoutput pixelspointer > > > And it produces the following > > //OUTPUT : > > > Image Height: > 188 > Image Width: > 250 > Bits Per Sample: > 8 > Rowstride: > 752 > n_channels: > 3 > Pixels pointer: > 176889768 > > But I don't know how to read the pixelspointer in J (which is returned by > gdk_pixbuf_get_pixels), I tried some things with memr but didnt get anything > that looks meaningful. Does someone know how this could be converted to an > array of integers ? > > Thanks, > Emir > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm -- regards, ==================================================== GPG key 1024D/4434BAB3 2008-08-24 gpg --keyserver subkeys.pgp.net --recv-keys 4434BAB3 ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
