improving actions history

src/canvas_actions.h

@@ -0,0 +1,20 @@
+#pragma once
+#include "action.h"
+
+class ActionStroke : public Action
+{
+public:
+    //std::unique_ptr<Stroke> m_stroke;
+    std::unique_ptr<uint8_t[]> m_image[6] = SIXPLETTE(nullptr);
+    glm::ivec4 m_old_box[6] = SIXPLETTE(glm::ivec4(0));
+    bool m_old_dirty[6] = SIXPLETTE(false);
+    glm::ivec4 m_box[6] = SIXPLETTE(glm::ivec4(0));
+    bool clear_layer = false;
+    int m_layer_idx = 0;
+    class Canvas* m_canvas;
+    virtual ~ActionStroke() = default;
+    virtual void run() override { }
+    virtual Action* get_redo() override;
+    virtual void undo() override;
+    virtual size_t memory() override;
+};