Hi,
I am trying to get a screenshot of the desktop by using a transparent
GtkWidget and then using gdk_pixbuf_get_from_drawable. When I check the
saved GdkPixbuf I am getting a valid image, but the image does not include
the background of the desktop but just the GtkWidget itself. Is there any
way of working around this?
I am simply creating a GtkWidget and then controlling the paint events, the
code for the paint and saving the image is below:
static gboolean on_window_expose_event(GtkWidget *widget, GdkEventExpose
*event, gpointer data)
{
cairo_t *cr;
cr = gdk_cairo_create(widget->window); // create cairo context
cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 0.7);
cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
cairo_paint(cr); // paint source
cairo_destroy(cr);
static int once = 0;
if ( once == 0 )
{
GdkPixbuf * pixbuf;
pixbuf = gdk_pixbuf_get_from_drawable( NULL, widget->window, colormap, 0,
0, 0, 0, 300, 200 );
if ( pixbuf != NULL )
{
GError * err = NULL;
gdk_pixbuf_save( pixbuf, "image.png", "png", &err, NULL );
}
once++;
}
return FALSE;
}
Thanks, Andy.
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