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ChangeResolution - Dynamically change the display resolution if the driver supports it

Description

Project Oberon assumes a monochrome display with fixed resolution. Various progress has been made to provide multiple resolutions (or even multiple color depths). However, at the moment the resolution needs to be chosen at boot time and cannot be changed.

This modification modifies Display.Mod to provide a SetSize procedure that receives the desired screen size and returns whether switching was successful (the default implementation always returns FALSE). A command System.SetScreenSize will read the desired resolution, try to set it in the display driver, and then inform the system by calling Oberon.UpdateScreenSize, which will in turn inform Input (to update the mouse bounds) and Viewers (to resize all open viewers and tracks).

Installation

  • Apply ChangeResolution.patch to Display.Mod, Viewers.Mod, Oberon.Mod and System.Mod.

  • Probably use a different `Display´ driver that actually supports multiple resolutions.

  • Recompile Display.Mod, Viewers.Mod and all dependencies (including the compiler):

    ORP.Compile Display.Mod/s Viewers.Mod/s ~
ORP.Compile Oberon.Mod/s ~
ORP.Compile MenuViewers.Mod/s ~
ORP.Compile TextFrames.Mod/s ~
ORP.Compile System.Mod/s ~
ORP.Compile Edit.Mod/s ~
ORP.Compile ORS.Mod/s ORB.Mod/s ~
ORP.Compile ORG.Mod/s ORP.Mod/s ~

  • Restart the system.