VTK  9.1.0
vtkOpenGLResourceFreeCallback.h
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1/*=========================================================================
2
3 Program: Visualization Toolkit
4
5 Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
6 All rights reserved.
7 See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
8
9 This software is distributed WITHOUT ANY WARRANTY; without even
10 the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
11 PURPOSE. See the above copyright notice for more information.
12
13=========================================================================*/
14
15#ifndef vtkOpenGLResourceFreeCallback_h
16#define vtkOpenGLResourceFreeCallback_h
17
18// Description:
19// Provide a mechanism for making sure graphics resources are
20// freed properly.
21
23class vtkWindow;
24
26{
27public:
29 {
30 this->VTKWindow = nullptr;
31 this->Releasing = false;
32 }
34
35 // Called when the event is invoked
36 virtual void Release() = 0;
37
39
40 bool IsReleasing() { return this->Releasing; }
41
42protected:
45};
46
47// Description:
48// Templated member callback.
49template <class T>
51{
52public:
53 vtkOpenGLResourceFreeCallback(T* handler, void (T::*method)(vtkWindow*))
54 {
55 this->Handler = handler;
56 this->Method = method;
57 }
58
59 ~vtkOpenGLResourceFreeCallback() override = default;
60
62 {
63 if (this->VTKWindow == rw)
64 {
65 return;
66 }
67 if (this->VTKWindow)
68 {
69 this->Release();
70 }
71 this->VTKWindow = rw;
72 if (this->VTKWindow)
73 {
75 }
76 }
77
78 // Called when the event is invoked
79 void Release() override
80 {
81 if (this->VTKWindow && this->Handler && !this->Releasing)
82 {
83 this->Releasing = true;
84 this->VTKWindow->PushContext();
85 (this->Handler->*this->Method)(this->VTKWindow);
87 this->VTKWindow->PopContext();
88 this->VTKWindow = nullptr;
89 this->Releasing = false;
90 }
91 }
92
93protected:
95 void (T::*Method)(vtkWindow*);
96};
97
98#endif
99// VTK-HeaderTest-Exclude: vtkOpenGLResourceFreeCallback.h
virtual void RegisterGraphicsResources(vtkOpenGLRenderWindow *rw)=0
virtual ~vtkGenericOpenGLResourceFreeCallback()=default
OpenGL rendering window.
void RegisterGraphicsResources(vtkGenericOpenGLResourceFreeCallback *cb)
void UnregisterGraphicsResources(vtkGenericOpenGLResourceFreeCallback *cb)
virtual void PushContext()
Ability to push and pop this window's context as the current context.
void RegisterGraphicsResources(vtkOpenGLRenderWindow *rw) override
vtkOpenGLResourceFreeCallback(T *handler, void(T::*method)(vtkWindow *))
~vtkOpenGLResourceFreeCallback() override=default
window superclass for vtkRenderWindow
Definition: vtkWindow.h:39