MakeScreen

Do an Intuition-integrated MakeVPort() of a screen.

This procedure allows you to do a MakeVPort() for the viewport of your custom screen in an Intuition-integrated way. This way you can do your own screen manipulations without worrying about interference with Intuition's usage of the same viewport.

The operation of this function is as follows:

• Block until the Intuition View structure is not in being changed.
  
  
• Set the view modes correctly to reflect if there is a (visible) interlaced screen.
  
  
• call MakeVPort(), passing the Intuition View and your screen's ViewPort.
  
  
• Unlocks the Intuition View.
  
  

After calling this routine, you should call RethinkDisplay() to incorporate the new viewport of your custom screen into the Intuition display.

NOTE:

Intuition may determine that because of a change in global

interlace needs that all viewports need to be remade, so it may effectively call RemakeDisplay().

Screen

address of the custom screen structure

Starting with V39, returns zero for success, non-zero for failure. Probable cause of failure is failure of graphics.library/MakeVPort(). Prior to V39, the return code is invalid. Do not interpret it when running on pre-V39 systems!

RethinkDisplay(), RemakeDisplay(), graphics.library/MakeVPort()