Copyright (C) 1994, Digital Equipment Corp.
Digital Internal Use Only
Created on Mon Mar 7 13:05:12 PST 1994 by najork
MODULE ObWin_OpenGL_Base;
IMPORT GraphicsBase, ObAux, ObCommand, ObGraphicsBase, ObInt, ObLib,
ObProtoLoader, ObText, ObValue, Obliq, ProxiedObj, SynLocation,
Win_OpenGL_Base, Win_OpenGL_BaseProxy;
CONST
pkgname = "Win`OpenGL`Base";
***************************************************************************
Wrapper for RootGO.T
***************************************************************************
TYPE
T = ObGraphicsBase.T BRANDED "ObWin_OpenGL_Base.T" OBJECT END;
PROCEDURE AddTObj (base : Win_OpenGL_Base.T) =
<* FATAL ObValue.Error, ObValue.Exception *>
BEGIN
WITH obj = Obliq.ObjectClone (Obliq.Vals {TProto}),
raw = NEW (T, what := "<a Win_OpenGL_Base.T>", po := base) DO
Obliq.ObjectUpdate (obj, "raw", raw);
base.proxy := NEW (ProxiedObj.Proxy, obj := obj);
END;
END AddTObj;
PROCEDURE GetArg (args : ObValue.ArgArray;
idx : INTEGER;
package : ObLib.T;
opCode : ObLib.OpCode;
loc : SynLocation.T) : Win_OpenGL_Base.T
RAISES {ObValue.Error, ObValue.Exception} =
BEGIN
WITH raw = Obliq.ObjectSelect (args[idx], "raw") DO
TYPECASE raw OF
| T (node) =>
RETURN node.po;
ELSE
ObValue.BadArgType (idx, pkgname, package.name, opCode.name, loc);
<* ASSERT FALSE *>
END;
END;
END GetArg;
***************************************************************************
Setup procedures
***************************************************************************
PROCEDURE SetupPackage () =
PROCEDURE NewOpCode (name : TEXT; arity : INTEGER; code : Code) : OpCode =
BEGIN
RETURN NEW (OpCode, name := name, arity := arity, code := code);
END NewOpCode;
TYPE
OpCodes = ARRAY OF ObLib.OpCode;
VAR
opCodes: REF OpCodes;
BEGIN
opCodes := NEW (REF OpCodes, NUMBER (Code));
opCodes^ :=
OpCodes {
NewOpCode ("New", 5, Code.New),
NewOpCode ("NewStd", 0, Code.NewStd),
NewOpCode ("ChangeTitle", 2, Code.ChangeTitle),
NewOpCode ("AwaitDelete", 1, Code.AwaitDelete),
NewOpCode ("Destroy", 1, Code.Destroy)
};
ObLib.Register (NEW (Package, name := pkgname, opCodes := opCodes));
ObLib.RegisterHelp (pkgname, Help);
END SetupPackage;
VAR
TProto : ObValue.Val;
PROCEDURE SetupModule (loader : ObProtoLoader.T) =
BEGIN
(*** retrieve the prototype ***)
loader.load ("Win_OpenGL_Base.obl");
TProto := loader.get ("Win`OpenGL`Base_TProto");
(*** Register the proxy maker ***)
Win_OpenGL_BaseProxy.MkProxyT := AddTObj;
END SetupModule;
***************************************************************************
Execution machinery
***************************************************************************
TYPE
Code = {New, NewStd, ChangeTitle, AwaitDelete, Destroy};
OpCode = ObLib.OpCode OBJECT
code: Code;
END;
Package = ObLib.T OBJECT
OVERRIDES
Eval := DoEval;
END;
PROCEDURE DoEval (self : Package;
opCode : ObLib.OpCode;
<* UNUSED *> arity : ObLib.OpArity;
READONLY args: ObValue.ArgArray;
<* UNUSED *> temp : BOOLEAN;
loc : SynLocation.T) : ObValue.Val
RAISES {ObValue.Error, ObValue.Exception} =
BEGIN
CASE NARROW (opCode, OpCode).code OF
| Code.New =>
TRY
WITH title = ObText.GetArg (args, 1, self, opCode, loc),
win_x = ObInt.GetArg (args, 2, self, opCode, loc),
win_y = ObInt.GetArg (args, 3, self, opCode, loc),
win_w = ObInt.GetArg (args, 4, self, opCode, loc),
win_h = ObInt.GetArg (args, 5, self, opCode, loc),
base = NEW (Win_OpenGL_Base.T).init (title, win_x, win_y,
win_w, win_h) DO
RETURN base.proxy.obj;
END;
EXCEPT
| GraphicsBase.Failure =>
ObValue.RaiseException (ObGraphicsBase.Failure, opCode.name, loc);
<* ASSERT FALSE *>
END;
| Code.NewStd =>
TRY
WITH base = NEW (Win_OpenGL_Base.T).init ("Anim3D Viewer") DO
RETURN base.proxy.obj;
END;
EXCEPT
| GraphicsBase.Failure =>
ObValue.RaiseException (ObGraphicsBase.Failure, opCode.name, loc);
<* ASSERT FALSE *>
END;
| Code.ChangeTitle =>
WITH base = GetArg (args, 1, self, opCode, loc),
title = ObText.GetArg (args, 2, self, opCode, loc) DO
base.changeTitle (title);
RETURN ObValue.valOk;
END;
| Code.AwaitDelete =>
WITH base = GetArg (args, 1, self, opCode, loc) DO
base.awaitDelete ();
RETURN ObValue.valOk;
END;
| Code.Destroy =>
WITH base = GetArg (args, 1, self, opCode, loc) DO
base.destroy ();
RETURN ObValue.valOk;
END;
END;
END DoEval;
***************************************************************************
Help
***************************************************************************
PROCEDURE Help (self : ObCommand.T; arg : TEXT; <* UNUSED *> data : REFANY) =
BEGIN
ObAux.Help (self, arg, pkgname, "Win_OpenGL_Base");
END Help;
BEGIN
END ObWin_OpenGL_Base.