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_defn_ex_vdicontr.def
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1988-04-24
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DEFINITION MODULE VDIControls;
FROM GEMVDIbase IMPORT VDIWorkInType, VDIWorkOutType, PxyArrayType;
PROCEDURE OpenWorkstation (VAR WorkIn: VDIWorkInType;
VAR Handle: INTEGER;
VAR WorkOut: VDIWorkOutType);
(* loads a device driver, and initialises device with parameters passed *)
PROCEDURE CloseWorkstation (Handle: INTEGER);
(* closes graphics device properly, and returns to alpha mode *)
PROCEDURE OpenVirtualWorkstation (VAR WorkIn: VDIWorkInType;
VAR Handle: INTEGER;
VAR WorkOut: VDIWorkOutType);
(* open virtual screen workstation *)
PROCEDURE CloseVirtualWorkstation (Handle: INTEGER);
(* close virtual device, preventing further output to it *)
PROCEDURE ClearWorkstation (Handle: INTEGER);
(* clear workstation. Erases the screen *)
PROCEDURE UpdateWorkstation (Handle: INTEGER);
(* execute immediately all pending graphics commands *)
PROCEDURE LoadFonts (Handle, Select: INTEGER): INTEGER;
(* loads fonts and makes them available *)
PROCEDURE UnloadFonts (Handle, Select: INTEGER);
(* dissociates fonts and removes them from memory *)
PROCEDURE SetClipping (Handle, ClipFlag: INTEGER;
VAR PxyArray: PxyArrayType);
(* enable/disable clipping of all ouput by GEM VDI *)
END VDIControls.