Add default image provider

libs/ui/include/psemek/ui/default_image_provider.hpp

@@ -0,0 +1,30 @@
+#pragma once
+
+#include <psemek/ui/image_provider.hpp>
+#include <psemek/util/hstring.hpp>
+
+#include <unordered_map>
+
+namespace psemek::ui
+{
+
+	struct default_image_provider
+		: image_provider
+	{
+		void put(std::string id, gfx::texture_view_2d view)
+		{
+			images_[std::move(id)] = view;
+		}
+
+		gfx::texture_view_2d get(std::string_view const & id) const override
+		{
+			if (auto it = images_.find(id); it != images_.end())
+				return it->second;
+			return {};
+		}
+
+	private:
+		std::unordered_map<util::hstring, gfx::texture_view_2d> images_;
+	};
+
+}

libs/ui/include/psemek/ui/image_provider.hpp

@@ -9,7 +9,7 @@ namespace psemek::ui
 
 	struct image_provider
 	{
-		virtual gfx::texture_view_2d get(std::string_view const & id) = 0;
+		virtual gfx::texture_view_2d get(std::string_view const & id) const = 0;
 
 		virtual ~ image_provider() {}
 	};