+ region = gdk_cairo_region_create_from_surface (surface);
+ cairo_region_translate (region, -extents.x, -extents.y);
+
+ gtk_widget_shape_combine_region (window, region);
+ cairo_region_destroy (region);
+
+ /* Need to saturate the colors, so it doesn't look like semi-transparent
+ * pixels were painted on black. */
+ saturated = gdk_window_create_similar_surface (gtk_widget_get_window (window),
+ CAIRO_CONTENT_COLOR,
+ extents.width,
+ extents.height);
+
+ cr = cairo_create (saturated);
+ cairo_push_group_with_content (cr, CAIRO_CONTENT_COLOR_ALPHA);
+ cairo_set_source_surface (cr, surface, -extents.x, -extents.y);
+ cairo_paint (cr);
+ cairo_set_operator (cr, CAIRO_OPERATOR_SATURATE);
+ cairo_paint (cr);
+ cairo_pop_group_to_source (cr);
+ cairo_paint (cr);
+ cairo_destroy (cr);
+
+ pattern = cairo_pattern_create_for_surface (saturated);
+
+ cairo_surface_destroy (saturated);
+ }
+ else
+ {
+ cairo_matrix_t matrix;
+
+ pattern = cairo_pattern_create_for_surface (surface);
+ cairo_matrix_init_translate (&matrix, extents.x, extents.y);
+ cairo_pattern_set_matrix (pattern, &matrix);
+ }
+
+ gdk_window_set_background_pattern (gtk_widget_get_window (window), pattern);
+
+ gtk_drag_set_icon_window (context, window, extents.x, extents.y, TRUE);