private bool ElgInitialize()
{
prevEglContext = EGL14.EglGetCurrentContext();
prevEglDisplay = EGL14.EglGetCurrentDisplay();
prevEglSurfaceRead = EGL14.EglGetCurrentSurface(EGL14.EglRead);
prevEglSurfaceDraw = EGL14.EglGetCurrentSurface(EGL14.EglDraw);
eglDisplay = EGL14.EglGetDisplay(EGL14.EglDefaultDisplay);
if (eglDisplay == EGL14.EglNoDisplay)
{
return(false);
}
int[] version = new int[2];
if (!EGL14.EglInitialize(eglDisplay, version, 0, version, 1))
{
return(false);
}
// Configure EGL for recording and OpenGL ES 2.0.
int[] attribList =
{
EGL14.EglRedSize, 8,
EGL14.EglGreenSize, 8,
EGL14.EglBlueSize, 8,
EGL14.EglAlphaSize, 8,
EGL14.EglRenderableType, EGL14.EglOpenglEsBit,
EGL_RECORDABLE_ANDROID, 1,
EGL14.EglNone
};
EGLConfig[] configs = new EGLConfig[1];
int[] numConfigs = new int[1];
EGL14.EglChooseConfig(eglDisplay, attribList, 0, configs, 0, configs.Length, numConfigs, 0);
CheckEglError();
// Configure context for OpenGL ES 2.0.
int[] attrib_list =
{
EGL14.EglContextClientVersion, 1,
EGL14.EglNone
};
eglContext = EGL14.EglCreateContext(eglDisplay, configs[0], EGL14.EglNoContext, attrib_list, 0);
CheckEglError();
int[] surfaceAttribs = { EGL14.EglNone };
eglSurface = EGL14.EglCreateWindowSurface(eglDisplay, configs[0], surface, surfaceAttribs, 0);
CheckEglError();
EGL14.EglMakeCurrent(eglDisplay, eglSurface, eglSurface, eglContext);
CheckEglError();
return(true);
}
/**
* Discard all resources held by this class, notably the EGL context. Also releases the
* Surface that was passed to our constructor.
*/
public void Release()
{
if (EGL14.EglGetCurrentContext().Equals(_EGLContext))
{
// Clear the current context and surface to ensure they are discarded immediately.
EGL14.EglMakeCurrent(_EGLDisplay, EGL14.EglNoSurface, EGL14.EglNoSurface,
EGL14.EglNoContext);
}
EGL14.EglDestroySurface(_EGLDisplay, _EGLSurface);
EGL14.EglDestroyContext(_EGLDisplay, _EGLContext);
//EGL14.eglTerminate(mEGLDisplay);
_surface.Release();
// null everything out so future attempts to use this object will cause an NPE
_EGLDisplay = null;
_EGLContext = null;
_EGLSurface = null;
_surface = null;
}