Running an example like hellogles3 with eglfs and the mouse cursor visible
breaks due to the cursor implementation not being aware of vertex array
objects. The cursor drawing code uses client side pointers and having a
VAO bound breaks this. Instead, the VAO should be reset to 0.
In addition, the same applies to all touched state: naive applications
doing custom OpenGL rendering expect the state to be unchanged between
frames and this is not unreasonable. So introduce saving and restoring
for all touched state, with the exception of Quick where there is no
need to waste time with this.
Change-Id: Ib79039e80993ab5fc8368357fc1147ee7863d055
Reviewed-by: Andy Nichols <andy.nichols@theqtcompany.com>
4d39da8734