Update some comments of the Layer class.

include/tgfx/layers/Layer.h

@@ -223,7 +223,7 @@ class Layer {
    * not create a new offscreen image to replace the original layer content. Instead, they add
    * visual elements either below or above the layer content, blending directly with the existing
    * content on the canvas. Each layer style uses the same layer content as input and draws on the
-   * canvas.
+   * canvas. Layer styles are applied before filters. The default value is an empty list.
    */
   const std::vector<std::shared_ptr<LayerStyle>>& layerStyles() const {
     return _layerStyles;
@@ -237,7 +237,8 @@ class Layer {
   /**
    * Returns the list of filters applied to the layer. Layer filters create new offscreen images
    * to replace the original layer content. Each filter takes the output of the previous filter as
-   * input, and the final output is drawn on the canvas.
+   * input, and the final output is drawn on the canvas. Layer filters are applied after layer
+   * styles. The default value is an empty list.
    */
   const std::vector<std::shared_ptr<LayerFilter>>& filters() const {
     return _filters;