compositor: add weston_surface_to_global_float helper

src/compositor.c

@@ -424,15 +424,22 @@ weston_surface_update_transform(struct weston_surface *surface)
 	weston_compositor_schedule_repaint(surface->compositor);
 }
 
+WL_EXPORT void
+weston_surface_to_global_float(struct weston_surface *surface,
+			       int32_t sx, int32_t sy, GLfloat *x, GLfloat *y)
+{
+	weston_surface_update_transform(surface);
+
+	surface_to_global_float(surface, sx, sy, x, y);
+}
+
 WL_EXPORT void
 weston_surface_to_global(struct weston_surface *surface,
 			 int32_t sx, int32_t sy, int32_t *x, int32_t *y)
 {
 	GLfloat xf, yf;
 
-	weston_surface_update_transform(surface);
+	weston_surface_to_global_float(surface, sx, sy, &xf, &yf);
-
-	surface_to_global_float(surface, sx, sy, &xf, &yf);
 	*x = floorf(xf);
 	*y = floorf(yf);
 }

src/compositor.h

@@ -342,6 +342,9 @@ weston_surface_update_transform(struct weston_surface *surface);
 void
 weston_surface_to_global(struct weston_surface *surface,
 			 int32_t sx, int32_t sy, int32_t *x, int32_t *y);
+void
+weston_surface_to_global_float(struct weston_surface *surface,
+			       int32_t sx, int32_t sy, GLfloat *x, GLfloat *y);
 
 void
 weston_surface_from_global(struct weston_surface *surface,