Reduce scroll cpu usage from 10% to 1-2% by load image files in another thread but load the texture in the main thread

1 files changed, 4 insertions, 2 deletions

diff --git a/include/ImageViewer.hpp b/include/ImageViewer.hpp
index 93e7d7c..0ca64e9 100644
--- a/include/ImageViewer.hpp
+++ b/include/ImageViewer.hpp
@@ -18,13 +18,15 @@ namespace QuickMedia {
         WAITING,
         LOADING,
         FAILED_TO_LOAD,
-        LOADED
+        LOADED,
+        APPLIED_TO_TEXTURE
     };
 
     struct ImageData {
         sf::Texture texture;
         sf::Sprite sprite;
         ImageStatus image_status;
+        std::unique_ptr<std::string> image_data_str;
         bool visible_on_screen;
     };
 
@@ -47,7 +49,7 @@ namespace QuickMedia {
         int get_focused_page() const;
         int get_num_pages() const { return num_pages; }
     private:
-        void load_image_async(const Path &path, std::shared_ptr<ImageData> image_data, int page);
+        void load_image_async(const Path &path, std::shared_ptr<ImageData> image_data);
         bool render_page(sf::RenderWindow &window, int page, double offset_y);
         sf::Vector2<double> get_page_size(int page);
     private: