Music XML

src/vamp_zero/ui.cpp

@@ -60,6 +60,19 @@ struct vamp_zero::score_draw_cache {
   }
 
   std::unordered_map<std::string, entry> entries{};
+  std::shared_ptr<vamp_zero::score_document const> page_document{};
+  std::size_t page_index{};
+  std::optional<vamp_zero::score_page_layout> page{};
+
+  auto draw(luma::draw_context& context, luma::rect bounds, std::shared_ptr<vamp_zero::score_document const> document, std::size_t index) -> void {
+    if (!page || page_document != document || index != page_index
+      || page->bounds.x != bounds.x || page->bounds.y != bounds.y || page->bounds.width != bounds.width || page->bounds.height != bounds.height) {
+      page = vamp_zero::layout_score_page(bounds, *document, index);
+      page_document = std::move(document);
+      page_index = index;
+    }
+    vamp_zero::draw_score_layout(context, *page);
+  }
 };
 
 namespace {
@@ -353,7 +366,7 @@ auto draw_score(luma::draw_context& context, luma::rect bounds, vamp_zero::app_s
     .width = bounds.width - 48.0F,
     .height = bounds.height - 36.0F,
   };
-  vamp_zero::draw_score_page(context, paper_bounds, **parsed, state.page_index);
+  score_cache.draw(context, paper_bounds, *parsed, state.page_index);
 }
 
 class vamp_root_control final : public luma::control {