buffered_graphics_context.hpp

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#pragma once
#include "buffered_graphics.hpp"
#include "graphics.hpp"
#include "point.hpp"
#include "size.hpp"
#include <xtd/optional>
#include <xtd/object>
#include <xtd/types>

namespace xtd {
  namespace drawing {
    class drawing_export_ buffered_graphics_context : public xtd::object {
    public:
      
      buffered_graphics_context() = default;
      
      
      [[nodiscard]] auto maximum_buffer() const noexcept -> const xtd::drawing::size&;
      auto maximum_buffer(const xtd::drawing::size& value) -> buffered_graphics_context&;
      
      
      auto allocate(const xtd::drawing::graphics& target_graphics, const xtd::drawing::rectangle& targat_rectangle) -> void;
      auto allocate(intptr target_dc, const xtd::drawing::rectangle& targat_rectangle) -> void;
      
      void invalidate();
      
    private:
      //xtd::drawing::buffered_graphics alloc_buffer_in_temp_manager(const xtd::drawing::graphics* target_graphics, intptr target_dc, const xtd::drawing::rectangle& target_rectangle);
      //xtd::drawing::buffered_graphics allocate_buffer(const xtd::drawing::graphics* target_graphics, intptr target_dc, const xtd::drawing::rectangle& target_rectangle);
      auto destroy() -> void;
      
      inline static const int BUFFER_FREE = 0; //the graphics buffer is free to use
      inline static const int BUFFER_BUSY_PAINTING = 1; //graphics buffer is busy being created/painting
      inline static const int BUFFER_BUSY_DESTROYING = 2; //graphics buffer is busy destroying
      
      xtd::ptr<xtd::drawing::buffered_graphics> buffer_;
      xtd::drawing::size buffered_size_;
      int busy_ = BUFFER_FREE;
      xtd::ptr<xtd::drawing::graphics> compat_graphics_;
      bool invalidate_when_free_ = false;
      xtd::drawing::size maximum_buffer_ {75 * 3, 32 * 3}; //by defualt, the size of our maxbuffer will be 3 x standard button size.
      xtd::drawing::point target_location_;
      xtd::drawing::size virtual_size_;
    };
  }
}