#ifndef __ExternalModules__
#define __ExternalModules__

/******************************************************************************
	File:		WorkshopModule.h

	Contains:	This header file contains the traps for calling functions 
				within Image Workshop.

	Written by:	Brian Powell

	Copyright:	© 1994 by Brian Powell, all rights reserved.

	WARNING: DO NOT ALTER THIS FILE, IT WILL CERTAINLY GAURANTEE THAT YOUR 
			 MODULE WILL NOT WORK WITH IMAGE WORKSHOP.

 ******************************************************************************/
#pragma once
// Include the register setup header
#ifdef __MWERKS__
	#include <MacHeaders68K>
	#include "A4Stuff.h"
	#include "SetupA4.h"
#else
	#include <MacHeaders>
	#include <SetupA4.h>
#endif
#include <QDOffscreen.h>

// Define
typedef struct {
	double	lat;
	double	lon;
} LatLon;

// Define Image Workshop Constants
#define kIWSignature '§PTM'
#define kIWImageType 'IM§P'
#define kIWCTableType 'CO§P'
#define kIWExternals 'EX§P'

// Declare our functions
typedef struct {
	pascal CTabHandle (*GetColorTable)(short);
	pascal void (*SetColorTable)(short, CTabHandle);
	pascal short (*GetTopImage)(void);
	pascal void (*PrintImage)(short);
	pascal void (*CloseImage)(short);
	pascal void (*GetCurrentLayer)(short);
	pascal Boolean (*BeginDrawing)(short);
	pascal void (*EndDrawing)(short);
	pascal short (*NewImage)(Point*, GWorldPtr);
	pascal void (*GetGeography)(short, LatLon *, double *, short *);
	pascal void (*SetGeography)(short, LatLon *, double, short);
	pascal short (*LoadImage)(StandardFileReply *, short);
	pascal short (*AddLayer)(short, GWorldPtr);
	pascal short (*GetCurrentLayerNum)(short);
	pascal short (*CountLayers)(short);
	pascal void (*SetCurrentLayer)(short, short);
	pascal void (*GetSelectionRect)(short, Rect *);
	pascal void (*BeginTask)(void);
	pascal void (*EndTask)(void);
	pascal void (*RedrawImage)(short);
	//pascal void (*)();
} ExternalFunctions, *ExternalProcPtrs;

// Define the error messages
enum {
	kUnexpectedError=1,
	kCommandNotImplemented
};

// Define our command codes
enum {
	kInitCode,
	kReadFile,
	kSaveFile,
	kExecuteCode,
	kDispose,
	kProcessTask,
	kCancelTask
};

// Declare our functions here
short ModuleInit(ExternalProcPtrs functions, Ptr data1, Ptr data2, Handle *myData);
short ModuleRead(ExternalProcPtrs functions, Ptr data1, Ptr data2, Handle *myData);
short ModuleSave(ExternalProcPtrs functions, Ptr data1, Ptr data2, Handle *myData);
short ModuleExecute(ExternalProcPtrs functions, Ptr data1, Ptr data2, Handle *myData);
short ModuleDispose(ExternalProcPtrs functions, Ptr data1, Ptr data2, Handle *myData);
short ModuleProcessTask(ExternalProcPtrs functions, Ptr data1, Ptr data2, Handle *myData);
short ModuleCancelTask(ExternalProcPtrs functions, Ptr data1, Ptr data2, Handle *myData);

#endif