1 files changed, 58 insertions, 0 deletions
diff --git a/SrcShared/EmScreen.h b/SrcShared/EmScreen.h
new file mode 100644
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--- /dev/null
+++ b/SrcShared/EmScreen.h
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+/* -*- mode: C++; tab-width: 4 -*- */
+/* ===================================================================== *\
+	Copyright (c) 2000-2001 Palm, Inc. or its subsidiaries.
+	All rights reserved.
+
+	This file is part of the Palm OS Emulator.
+
+	This program is free software; you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation; either version 2 of the License, or
+	(at your option) any later version.
+\* ===================================================================== */
+
+#ifndef EmScreen_h
+#define EmScreen_h
+
+#include "EmPixMap.h"			// EmPixMap
+
+class SessionFile;
+
+class EmScreenUpdateInfo
+{
+	public:
+		// Output parameters.  Passed back to caller of
+		// Screen::GetBits.  fLCDOn is always valid.  The
+		// other fields are valid only if Screen::GetBits
+		// returns true.
+
+		EmPixMap	fImage;			// LCD image
+		long		fFirstLine;		// First changed scanline
+		long		fLastLine;		// Last changed scanline + 1
+		long		fLeftMargin;	// If LCD is scrlled by some sub-byte amount,
+									// this contains that amount.
+		Bool		fLCDOn;			// True if LCD is on at all
+
+		// Input parameters.  Set by Screen::GetBits and
+		// passed to EmHAL::GetLCDScanlines.
+
+		emuptr		fScreenLow;		// First dirty byte
+		emuptr		fScreenHigh;	// Last dirty byte
+};
+
+class EmScreen
+{
+	public:
+		static void 			Initialize			(void);
+		static void 			Reset				(void);
+		static void 			Save				(SessionFile&);
+		static void 			Load				(SessionFile&);
+		static void 			Dispose 			(void);
+
+		static void 			MarkDirty			(emuptr address, uint32 size);
+		static void 			InvalidateAll		(void);
+
+		static Bool 			GetBits 			(EmScreenUpdateInfo&);
+};
+
+#endif	// EmScreen_h