BitmapWindowSystem.h

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// ----------------------------------------------------------------------------
// -                        Open3D: www.open3d.org                            -
// ----------------------------------------------------------------------------
// Copyright (c) 2018-2023 www.open3d.org
// SPDX-License-Identifier: MIT
// ----------------------------------------------------------------------------
 
#pragma once
 
#include <functional>
#include <memory>
 
#include "open3d/visualization/gui/WindowSystem.h"
 
namespace open3d {
 
namespace core {
class Tensor;
}
 
namespace visualization {
namespace gui {
 
struct MouseEvent;
struct KeyEvent;
struct TextInputEvent;
 
class BitmapWindowSystem : public WindowSystem {
public:
    enum class Rendering {
        NORMAL,   // normal OpenGL rendering, requires X11, Win32, or Cocoa
        HEADLESS  // uses EGL, does not require the OS to have a window system.
                  // (Linux only)
    };
    BitmapWindowSystem(Rendering mode = Rendering::NORMAL);
    ~BitmapWindowSystem();
 
    void Initialize() override;
    void Uninitialize() override;
 
    using OnDrawCallback =
            std::function<void(Window*, std::shared_ptr<core::Tensor>)>;
    void SetOnWindowDraw(OnDrawCallback callback);
 
    void WaitEventsTimeout(double timeout_secs) override;
 
    OSWindow CreateOSWindow(Window* o3d_window,
                            int width,
                            int height,
                            const char* title,
                            int flags) override;
    void DestroyWindow(OSWindow w) override;
 
    Size GetScreenSize(OSWindow w) override;
 
    void PostRedrawEvent(OSWindow w) override;
    void PostMouseEvent(OSWindow w, const MouseEvent& e);
    void PostKeyEvent(OSWindow w, const KeyEvent& e);
    void PostTextInputEvent(OSWindow w, const TextInputEvent& e);
 
    bool GetWindowIsVisible(OSWindow w) const override;
    void ShowWindow(OSWindow w, bool show) override;
 
    void RaiseWindowToTop(OSWindow w) override;
    bool IsActiveWindow(OSWindow w) const override;
 
    Point GetWindowPos(OSWindow w) const override;
    void SetWindowPos(OSWindow w, int x, int y) override;
 
    Size GetWindowSize(OSWindow w) const override;
    void SetWindowSize(OSWindow w, int width, int height) override;
 
    Size GetWindowSizePixels(OSWindow w) const override;
    void SetWindowSizePixels(OSWindow w, const Size& size) override;
 
    float GetWindowScaleFactor(OSWindow w) const override;
    float GetUIScaleFactor(OSWindow w) const override;
 
    void SetWindowTitle(OSWindow w, const char* title) override;
 
    Point GetMousePosInWindow(OSWindow w) const override;
    int GetMouseButtons(OSWindow w) const override;
 
    void CancelUserClose(OSWindow w) override;
 
    void* GetNativeDrawable(OSWindow w) override;
 
    rendering::FilamentRenderer* CreateRenderer(OSWindow w) override;
 
    void ResizeRenderer(OSWindow w,
                        rendering::FilamentRenderer* renderer) override;
 
    MenuBase* CreateOSMenu() override;
 
private:
    struct Impl;
    std::unique_ptr<Impl> impl_;
};
 
}  // namespace gui
}  // namespace visualization
}  // namespace open3d