remove direct use of rtt and dirty area from the layer

src/canvas_layer.h

@@ -3,9 +3,16 @@
 #include "log.h"
 #include "texture.h"
 
-class LayerFrame
+struct LayerFrame
 {
-
+    std::array<RTT, 6> m_rtt;
+    std::array<glm::vec4, 6> m_dirty_box = SIXPLETTE(glm::vec4(0));
+    std::array<bool, 6> m_dirty_face = SIXPLETTE(false);
+    int m_duration = 1;
+    int w = 0, h = 0;
+    LayerFrame() = default;
+    bool create(int width, int height, int duration = 1);
+    bool resize(int width, int height);
 };
 
 class Layer
@@ -14,11 +21,9 @@ class Layer
 public:
     Layer() { id = s_count++; }
     Layer(const Layer&) = delete;
-    ~Layer() { LOG("LAYER AUTO DESTROY"); destroy(); }
     uint32_t id;
-    RTT m_rtt[6];
-    std::array<glm::vec4, 6> m_dirty_box = SIXPLETTE(glm::vec4(0));
-    std::array<bool, 6> m_dirty_face = SIXPLETTE(false);
+    std::vector<LayerFrame> m_frames;
+    int m_frame_index = 0;
     bool m_visible = true;
     bool m_alpha_locked = false;
     float m_opacity = 1.f;
@@ -39,8 +44,13 @@ public:
         void optimize();
         int memsize() const;
     };
+    RTT& rtt(int i);
+    glm::vec4& box(int i);
+    bool& face(int i);
+    LayerFrame& frame();
     void resize(int width, int height);
     bool create(int width, int height, std::string name);
+    bool add_frame();
     void clear(const glm::vec4& c);
     Snapshot snapshot(std::array<glm::vec4, 6>* dirty_box = nullptr, std::array<bool, 6>* dirty_face = nullptr);
     TextureCube gen_cube();