Now Sprite can do either aspect_ratio scaling or stretching and Icon is just a subclass.

demos/clicker_game.cpp

@@ -101,7 +101,7 @@ struct ClickerUI {
     }
 
     $clicker = $gui.entity("clicker");
-    $gui.set<guecs::Sprite>($clicker, {"clicker_the_dog"});
+    $gui.set<guecs::Sprite>($clicker, {"clicker_the_dog", 0, true});
     $gui.set<guecs::Sound>($clicker, {"clicker_bark"});
     $gui.set<guecs::Clickable>($clicker, {
         [&](auto, auto) { handle_button(Event::CLICKER); }

include/guecs/sfml/components.hpp

@@ -40,6 +40,7 @@ namespace guecs {
   struct Sprite {
     string name;
     int padding = THEME.PADDING;
+    bool stretch = false;
     std::shared_ptr<sf::Sprite> sprite = nullptr;
 
     void init(lel::Cell &cell);
@@ -47,15 +48,7 @@ namespace guecs {
     void render(sf::RenderWindow& window, sf::Shader *shader_ptr);
   };
 
-  struct Icon {
-    string name;
-    int padding = THEME.PADDING;
-    std::shared_ptr<sf::Sprite> sprite = nullptr;
-
-    void init(lel::Cell &cell);
-    void update(const string& new_name);
-    void render(sf::RenderWindow& window, sf::Shader *shader_ptr);
-  };
+  struct Icon : public Sprite { };
 
   struct Rectangle {
     int padding = THEME.PADDING;

src/guecs/sfml/components.cpp

@@ -52,42 +52,19 @@ namespace guecs {
 
     sprite->setPosition({float(cell.x + padding), float(cell.y + padding)});
 
+    if(stretch) {
       sprite->setScale({
           float(cell.w - padding * 2) / float(bounds.x),
           float(cell.h - padding * 2) / float(bounds.y)});
-  }
-
-  void Sprite::render(sf::RenderWindow& window, sf::Shader *shader_ptr) {
-    window.draw(*sprite, shader_ptr);
-  }
-
-  void Icon::update(const string& new_name) {
-    if(new_name != name) {
-      name = new_name;
-      auto sprite_texture = BACKEND->get_icon(name);
-      sprite->setTexture(*sprite_texture.texture);
-      sprite->setTextureRect({{0,0},sprite_texture.frame_size});
+    } else {
+      float box_width = float(cell.w - padding * 2);
+      float box_height = float(cell.h - padding * 2);
+      float scale = std::min(box_width / float(bounds.x), box_height / float(bounds.y));
+      sprite->setScale({scale, scale});
     }
   }
 
-  void Icon::init(lel::Cell &cell) {
-    auto sprite_texture = BACKEND->get_icon(name);
-    auto bounds = sprite_texture.frame_size;
-
-    sf::IntRect rect{{0,0}, bounds};
-    sprite = make_shared<sf::Sprite>(*sprite_texture.texture, rect);
-
-    sprite->setPosition({ float(cell.x + padding), float(cell.y + padding)});
-
-    float a_ratio = float(bounds.x) / float(bounds.y);
-    float x_scale = float(cell.w - padding * 2) / float(bounds.x);
-    float y_new_size = (float(bounds.x) * x_scale) / a_ratio;
-    float y_scale = float(cell.h - padding * 2) / y_new_size;
-
-    sprite->setScale({x_scale, y_scale});
-  }
-
-  void Icon::render(sf::RenderWindow& window, sf::Shader *shader_ptr) {
+  void Sprite::render(sf::RenderWindow& window, sf::Shader *shader_ptr) {
     window.draw(*sprite, shader_ptr);
   }