output: don't redraw if there's nothing to animate

src/output.c

@@ -371,15 +371,22 @@ static void redraw(struct dp_output *output) {
 			}
 
 			cairo_stroke(buffer->cairo);
+
+			if (config->border_gradient != DP_BORDER_GRADIENT_NONE &&
+					config->animation_duration != 0) {
+				bool whole = selection->x == 0 && selection->y == 0 &&
+						selection->width == output->effective_width &&
+						selection->height == output->effective_height;
+				if (!whole) {
+					// The border is animated and visible
+					output->needs_redraw = true;
+				}
+			}
 		}
 
 		cairo_rectangle(buffer->cairo, x, y, width, height);
 		set_cairo_color(buffer->cairo, config->selected_color);
 		cairo_fill(buffer->cairo);
-
-		if (config->border_gradient != DP_BORDER_GRADIENT_NONE && config->animation_duration != 0) {
-			output->needs_redraw = true;
-		}
 	}
 
 	wl_surface_attach(output->select_surface, buffer->wl_buffer, 0, 0);