Add canvas UI node

src/graphics/ui/elements/Canvas.hpp

@@ -0,0 +1,25 @@
+#pragma once
+
+#include "UINode.hpp"
+#include "graphics/core/ImageData.hpp"
+#include "graphics/core/Texture.hpp"
+
+class Texture;
+
+namespace gui {
+    class Canvas final : public UINode {
+    public:
+        explicit Canvas(ImageFormat inFormat, glm::uvec2 inSize);
+
+        ~Canvas() override = default;
+
+        void draw(const DrawContext& pctx, const Assets& assets) override;
+
+        [[nodiscard]] std::shared_ptr<::Texture> texture() const {
+            return mTexture;
+        }
+    private:
+        std::shared_ptr<::Texture> mTexture;
+        std::unique_ptr<ImageData> mData;
+    };
+}