protected sealed override void CreateNativeResources(EvasObject parent)
{
if (glEvas == IntPtr.Zero)
{
// initialize the OpenGL (the EFL way)
glEvas = Evas.evas_gl_new(Evas.evas_object_evas_get(parent));
// copy the configuration to the native side
glConfigPtr = Marshal.AllocHGlobal(Marshal.SizeOf(glConfig));
Marshal.StructureToPtr(glConfig, glConfigPtr, false);
// try initialize the context with Open GL ES 3.x first
glContext = Evas.evas_gl_context_version_create(glEvas, IntPtr.Zero, Evas.GLContextVersion.EVAS_GL_GLES_3_X);
// if we could not get 3.x, try 2.x
if (glContext == IntPtr.Zero)
{
Log.Debug("SKGLSurfaceView", "OpenGL ES 3.x was not available, trying 2.x.");
glContext = Evas.evas_gl_context_version_create(glEvas, IntPtr.Zero, Evas.GLContextVersion.EVAS_GL_GLES_2_X);
}
// if that is not available, the default
if (glContext == IntPtr.Zero)
{
Log.Debug("SKGLSurfaceView", "OpenGL ES 2.x was not available, trying the default.");
glContext = Evas.evas_gl_context_create(glEvas, IntPtr.Zero);
}
}
}
