Tuesday, May 24, 2011

eglTerminate example c c++ java

Name

eglTerminate - terminate an EGL display connection

C Specification

EGLBoolean eglTerminate(EGLDisplay display)

Parameters

display
Specifies the EGL display connection to terminate.

Description

eglTerminate releases resources associated with an EGL display connection. Termination marks all EGL resources associated with the EGL display connection for deletion. If contexts or surfaces associated with display is current to any thread, they are not released until they are no longer current as a result of eglMakeCurrent.
Terminating an already terminated EGL display connection has no effect. A terminated display may be re-initialized by calling eglInitialize again.

Errors

EGL_FALSE is returned if eglTerminate fails, EGL_TRUE otherwise.
EGL_BAD_DISPLAY is generated if display is not an EGL display connection.

Copyright

Copyright © 2003 Silicon Graphics, Inc.
This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.

See Also

eglInitialize, eglMakeCurrent

Example of eglTerminate

void CXXXView::OnInitialUpdate()
{
 CView::OnInitialUpdate();
 // TODO: Add your specialized code here and/or call the base class
 if (m_eglDisplay != EGL_NO_DISPLAY)
  return;
 const EGLint attrs[] = {
  EGL_LEVEL, 0,
  EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
  EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
  EGL_NATIVE_RENDERABLE, EGL_FALSE,
  EGL_DEPTH_SIZE, EGL_DONT_CARE,
  EGL_NONE
 };
 EGLint numConfig =0;
 m_eglDisplay = eglGetDisplay(GetDC()->GetSafeHdc());
 if (m_eglDisplay == EGL_NO_DISPLAY)
  if ((m_eglDisplay = eglGetDisplay((EGLNativeDisplayType) EGL_DEFAULT_DISPLAY)) == EGL_NO_DISPLAY)
   return;
 // Initialize the display
 EGLint major = 0;
 EGLint minor = 0;
 if (!eglInitialize(m_eglDisplay, &major, &minor))
  return;
 if (major < 1 || minor < 3)
 {
  // Does not support EGL 1.3
  printf("System does not support at least EGL 1.3 \n");
  return;
 }
 EGLConfig eglConfig;
 // Obtain the first configuration with a depth buffer
 if (!eglChooseConfig(m_eglDisplay, attrs, &eglConfig, 1, &numConfig))
  return;
 // Create a surface for the main window
 if ((m_eglSurface = eglCreateWindowSurface(m_eglDisplay, eglConfig, (EGLNativeWindowType) GetSafeHwnd(), NULL)) == EGL_NO_SURFACE)
  return;
 // Bind the API (It could be OpenGLES or OpenVG)
 // eglBindAPI(EGL_OPENGL_ES_API);
 EGLint ai32ContextAttribs[] = { EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE };
 // Create an OpenGL ES context
 if ((m_eglContext = eglCreateContext(m_eglDisplay, eglConfig, EGL_NO_CONTEXT, ai32ContextAttribs)) == EGL_NO_CONTEXT)
  return;
 // Make the context and surface current
 if (!eglMakeCurrent(m_eglDisplay, m_eglSurface, m_eglSurface, m_eglContext))
  return;
 ///
 glClearColor(0.5f, 0.5f, 0.5f, 0.0f);
}
void CXXXView::PostNcDestroy()
{
 // TODO: Add your specialized code here and/or call the base class
 eglMakeCurrent(EGL_NO_DISPLAY, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
 eglDestroyContext(m_eglDisplay, m_eglContext);
 eglDestroySurface(m_eglDisplay, m_eglSurface);
 eglTerminate(m_eglDisplay);
 CView::PostNcDestroy();
}
void CXXXView::onDraw(void)
{
 glClear(GL_COLOR_BUFFER_BIT);
 ///
 IGameImporter * gameImport = NULL;
 auto pDoc = GetDocument();
 if (pDoc && pDoc->IsKindOf(RUNTIME_CLASS(CXXXDoc)))
  gameImport = dynamic_cast<cxxxdoc *=""> (pDoc)->getGameImport();
 ///
 eglSwapBuffers(m_eglDisplay, m_eglSurface);
}
BOOL CXXXView::OnEraseBkgnd(CDC* pDC)
{
 // TODO: Add your message handler code here and/or call default
 /// return CView::OnEraseBkgnd(pDC);
 return FALSE;
}
void CXXXView::OnSize(UINT nType, int cx, int cy)
{
 CView::OnSize(nType, cx, cy);
 // TODO: Add your message handler code here
 glViewport(0, 0, cx, cy);
}
/// CXXXApp.cpp
BOOL CXXXApp::OnIdle(LONG lCount)
{
 // TODO: Add your specialized code here and/or call the base class
// return CWinAppEx::OnIdle(lCount);
 CMainFrame * pFrame = (CMainFrame *) AfxGetMainWnd();
 CView * pView = pFrame->GetActiveView();
 if (pView && pView->IsKindOf(RUNTIME_CLASS(CXXXView)))
  dynamic_cast<cxxxview *=""> (pView)->onDraw();
 return TRUE;
}
/// CViewTree.h
#define WM_TVN_SELCHANGED (WM_USER+3)
class CViewTree : public CTreeCtrl
{
public:
 afx_msg void OnTvnSelchanged(NMHDR *pNMHDR, LRESULT *pResult);
};
/// CViewTree.cpp
BEGIN_MESSAGE_MAP(CViewTree, CTreeCtrl)
 ON_NOTIFY_REFLECT(TVN_SELCHANGED, &CViewTree::OnTvnSelchanged)
END_MESSAGE_MAP()
void CViewTree::OnTvnSelchanged(NMHDR *pNMHDR, LRESULT *pResult)
{
 LPNMTREEVIEW pNMTreeView = reinterpret_cast<lpnmtreeview>(pNMHDR);
 // TODO: Add your control notification handler code here
 GetParent()->SendNotifyMessage(WM_TVN_SELCHANGED, (WPARAM) pNMTreeView, (LPARAM) pResult);
 *pResult = 0;
}