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comparison Framework/Viewport/IViewport.h @ 1203:f3bb9a6dd949 broker

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locking abstraction in IViewport
author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 29 Nov 2019 21:22:21 +0100
parents 5e164c629923
children 6009c59d8676
comparison
equal deleted inserted replaced
1200:54cbffabdc45 1203:f3bb9a6dd949
27 namespace OrthancStone 27 namespace OrthancStone
28 { 28 {
29 /** 29 /**
30 * Class that combines a Scene2D with a canvas where to draw the 30 * Class that combines a Scene2D with a canvas where to draw the
31 * scene. A call to "Refresh()" will update the content of the 31 * scene. A call to "Refresh()" will update the content of the
32 * canvas. 32 * canvas. A "IViewport" can possibly be accessed from several
33 * threads depending on the rendering back-end (e.g. in SDL or Qt):
34 * The "ILock" subclass implements the locking mechanism to modify
35 * the content of the scene.
36 *
37 * NB: The lock must be a "recursive_mutex", as the viewport
38 * controller can lock it a second time (TODO - Why so?).
33 **/ 39 **/
34 class IViewport : public boost::noncopyable 40 class IViewport : public boost::noncopyable
35 { 41 {
36 public: 42 public:
43 class ILock : public boost::noncopyable
44 {
45 public:
46 virtual ~ILock()
47 {
48 }
49
50 virtual Scene2D& GetScene() = 0;
51
52 virtual ScenePoint2D GetPixelCenterCoordinates(int x, int y) = 0;
53
54 virtual bool HasCompositor() const = 0;
55
56 virtual ICompositor& GetCompositor() = 0;
57 };
58
37 virtual ~IViewport() 59 virtual ~IViewport()
38 { 60 {
39 } 61 }
40 62
41 virtual Scene2D& GetScene() = 0;
42
43 virtual void Refresh() = 0; 63 virtual void Refresh() = 0;
44 64
45 virtual ScenePoint2D GetPixelCenterCoordinates(int x, int y) const = 0; 65 virtual ILock* Lock() = 0;
46
47 virtual bool HasCompositor() const = 0;
48
49 virtual ICompositor& GetCompositor() = 0;
50
51 virtual const ICompositor& GetCompositor() const = 0;
52 }; 66 };
53 } 67 }