Sorry, reposting the previous message with rich-formatting enabled. Hi all.
I managed to procure the following code from http://rosettacode.org/wiki/Color_of_a_screen_pixel, that retrieves the pixel color values. This works in gtk. ####################################################### import gtk import gobject def get_pixel_colour(i_x, i_y): o_gdk_pixbuf = gtk.gdk.Pixbuf(gtk.gdk.COLORSPACE_RGB, False, 8, 1, 1) o_gdk_pixbuf.get_from_drawable(gtk.gdk.get_default_root_window(), gtk.gdk.colormap_get_system(), i_x, i_y, 0, 0, 1, 1) print tuple(o_gdk_pixbuf.get_pixels_array().tolist()[0][0]) def f(): for i in range(0, 50): get_pixel_colour(5, i) win = gtk.Window() win.show() gobject.timeout_add(5000, f) gtk.main() ####################################################### Now, as the next thing, I would require the way to "set" color in a pixel, given its x- and y-coordinates. Any ideas please? :) On Sat, Jul 6, 2013 at 7:23 PM, Ajay Garg <ajaygargn...@gmail.com> wrote: > Hi all. > > I managed to procure the following code from > http://rosettacode.org/wiki/Color_of_a_screen_pixel, that retrieves > the pixel color values. > This works in gtk. > > > ####################################################### > import gtk > import gobject > > def get_pixel_colour(i_x, i_y): > o_gdk_pixbuf = gtk.gdk.Pixbuf(gtk.gdk.COLORSPACE_RGB, False, 8, 1, 1) > o_gdk_pixbuf.get_from_drawable(gtk.gdk.get_default_root_window(), > gtk.gdk.colormap_get_system(), i_x, i_y, 0, 0, 1, 1) > print tuple(o_gdk_pixbuf.get_pixels_array().tolist()[0][0]) > > def f(): > for i in range(0, 50): > get_pixel_colour(5, i) > > win = gtk.Window() > win.show() > > gobject.timeout_add(5000, f) > > gtk.main() > ####################################################### > > > > Now, as the next thing, I would require the way to "set" color in a > pixel, given its x- and y-coordinates. > > > Any ideas please? :) > > > On Sat, Jul 6, 2013 at 6:36 PM, Ajay Garg <ajaygargn...@gmail.com> wrote: > > Hi all. > > > > How can we get the color of each pixel on the "current screen" > > (possibly beginning from > > http://www.pygtk.org/docs/pygtk/class-gdkscreen.html)? > > > > The use-case is as follows :: > > > > * Let's say, I compare two rows of pixels on the current screen. > > * The first row is "all white". > > * The second row is interspersed with "black and white". > > * For every such "black and white" row, replace it with an "all > white" row. > > > > > > > > I am a coder myself, so all I need are some pointers :) > > > > Looking forward to some help :) > > > > > > Thanks and Regards, > > Ajay > > > > Thanks and Regards, > Ajay > -- Regards, Ajay
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