Update a part of the texture from the contents of a window.
No additional check is performed on the size of the window, passing an
invalid combination of window size and offset will lead to an undefined
behaviour.
This function does nothing if either the texture or the window was not
previously created.
Update a part of the texture from the contents of a window.
No additional check is performed on the size of the window, passing an invalid combination of window size and offset will lead to an undefined behaviour.
This function does nothing if either the texture or the window was not previously created.