On 12/07/10 00:01, Tim Evans wrote: > On 2010-07-11 4:19, Andrew wrote: >> Hi guys, >> >> In this example, a small gtk.gdk.Pixbuf is copied onto a larger pixbuf >> however where on the small pixbuf, there is transparency, this is >> converted to the gtk background colour. >> >> This means when the small pixbuf is copied 3 times and overlaid (as in >> the example), it looks incorrect. How do I make it so that the >> transparency in the small pixbuf is not replaced with the gtkbackground >> colour? > > You need to use the 'composite' method rather than copy_area. I would > provide example code, but the arguments are a bit complex and I'd be > sure to get them wrong the first time and confuse you. >
I am afraid that didn't work either. It now gives me the image shown in
the screenshot attached. Below is my code.
Is there a way to do this successfully or do I need to use cairo or
something? (I must mention that the pixbufs I retrieve from a
gtk.Icontheme are SVGs, if this makes any difference)
#!/usr/bin/env python
import gtk
from gtk import gdk as gdk
small = 16
counter = 0
offset = 4
large = 24
if __name__ == "__main__":
icon_theme = gtk.icon_theme_get_default();
small_pixbuf = icon_theme.load_icon("image", small, ());
large_pixbuf = icon_theme.load_icon("image", large, ());
large_pixbuf.fill(0x000000);
small_pixbuf_buffer = small_pixbuf.copy()
small_pixbuf.composite(large_pixbuf, 0, 0, 24, 24, 0, 0, 1, 1,
gdk.INTERP_NEAREST, 255);
small_pixbuf_buffer = small_pixbuf.copy()
small_pixbuf.composite(large_pixbuf, 0, 0, 24, 24, 4, 4, 1, 1,
gdk.INTERP_NEAREST, 255);
small_pixbuf_buffer = small_pixbuf.copy()
small_pixbuf.composite(large_pixbuf, 0, 0, 24, 24, 8, 8, 1, 1,
gdk.INTERP_NEAREST, 255);
window = gtk.Window()
image = gtk.Image()
image.set_from_pixbuf(large_pixbuf)
window.add(image)
window.show_all()
window.connect("delete-event", gtk.main_quit)
gtk.main()
--
Andrew
<<attachment: Screenshot-untitled.py.png>>
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