Extract stroke draw pad face callback body

src/canvas.cpp

@@ -882,6 +882,21 @@ void Canvas::stroke_draw_pad_face_orchestration(
     bool copy_stroke_destination,
     const pp::renderer::Extent2D& stroke_extent,
     const glm::vec4& pad_color)
+{
+    stroke_draw_pad_face_callback_body(
+        box_dirty,
+        box_face,
+        copy_stroke_destination,
+        stroke_extent,
+        pad_color);
+}
+
+void Canvas::stroke_draw_pad_face_callback_body(
+    const std::array<bool, 6>& box_dirty,
+    const std::array<glm::vec4, 6>& box_face,
+    bool copy_stroke_destination,
+    const pp::renderer::Extent2D& stroke_extent,
+    const glm::vec4& pad_color)
 {
     pp::panopainter::setup_legacy_stroke_pad_shader(
         pp::panopainter::LegacyStrokePadUniforms {

src/canvas.h

@@ -253,6 +253,12 @@ private:
         bool copy_stroke_destination,
         const pp::renderer::Extent2D& stroke_extent,
         const glm::vec4& pad_color);
+    void stroke_draw_pad_face_callback_body(
+        const std::array<bool, 6>& box_dirty,
+        const std::array<glm::vec4, 6>& box_face,
+        bool copy_stroke_destination,
+        const pp::renderer::Extent2D& stroke_extent,
+        const glm::vec4& pad_color);
     void stroke_draw_dual_pass(
         const std::vector<StrokeFrame>& frames_dual,
         const std::array<pp::panopainter::LegacyCanvasStrokeTextureBinding, 1>& dual_pass_texture_bindings,