I want to set the alpha transparency of an image with this code, but
it does nothing.
Could anyone tell me the correct way to do it?
bool on_expose_event(GdkEventExpose* ev)
{
img_->add_alpha(false, 0, 0, 0);
img_->composite(img_, 0, 0, img_->get_width(),
img_->get_height()
, 0, 0, 1, 1,
Gdk::INTERP_BILINEAR, 10);
img_->render_to_drawable(get_window(),
get_style()->get_black_gc(),
0, 0, 100, 80, img_->get_width(), img_->get_height(), // draw
the
whole image (from 0,0 to the full width,height) at 100,80 in the
window
Gdk::RGB_DITHER_NONE, 0, 0);
return true;
}
img_ is a Glib::RefPtr<Gdk::Pixbuf>.
Thanks in advance.
_______________________________________________
gtkmm-list mailing list
[email protected]
http://mail.gnome.org/mailman/listinfo/gtkmm-list
