Systems::render_map now holds the logic to render the map, and it's working well enough to use for displaying.

systems.cpp

@@ -565,3 +565,35 @@ bool System::inventory_occupied(GameLevel& level, Entity container_id, const std
   auto& inventory = level.world->get<inventory::Model>(container_id);
   return inventory.has(name);
 }
+
+
+void System::render_map(Matrix& tiles, EntityGrid& entity_map, sf::RenderTexture& render) {
+  sf::Vector2i size{MAP_TILE_DIM,MAP_TILE_DIM};
+  unsigned int width = matrix::width(tiles);
+  unsigned int height = matrix::height(tiles);
+  sf::Vector2u dim{width * size.x, height * size.y};
+  auto render_size = render.getSize();
+
+  if(render_size.x != width || render_size.y != height) {
+    bool worked = render.resize(dim);
+    dbc::check(worked, "Failed to resize map render target.");
+  }
+
+  render.clear({0,0,0,0});
+
+  for(matrix::each_row it{tiles}; it.next();) {
+    wchar_t display = tiles[it.y][it.x];
+    if(display == L' ') continue; // skip for now
+    auto& sprite = textures::get_map_sprite(display);
+    sprite.setPosition({float(it.x * size.x), float(it.y * size.y)});
+    render.draw(sprite);
+  }
+
+  for(auto [point, display] : entity_map) {
+    auto& sprite = textures::get_map_sprite(display);
+    sprite.setPosition({float(point.x * size.x), float(point.y * size.y)});
+    render.draw(sprite);
+  }
+
+  render.display();
+}