First Checked In.

gfx/src/mac/nsGfxUtils.h

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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * The contents of this file are subject to the Netscape Public
+ * License Version 1.1 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the License is distributed on an "AS
+ * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ * implied. See the License for the specific language governing
+ * rights and limitations under the License.
+ *
+ * The Original Code is mozilla.org code.
+ *
+ * The Initial Developer of the Original Code is Netscape
+ * Communications Corporation.  Portions created by Netscape are
+ * Copyright (C) 1998 Netscape Communications Corporation. All
+ * Rights Reserved.
+ *
+ * Contributor(s): 
+ */
+ 
+#ifndef nsGfxUtils_h_
+#define nsGfxUtils_h_
+
+#ifndef CarbonHelpers_h__
+#include "nsCarbonHelpers.h"
+#endif // CarbonHelpers_h__
+
+//------------------------------------------------------------------------
+// utility port setting class
+//------------------------------------------------------------------------
+
+class StPortSetter
+{
+public:
+	StPortSetter(GrafPtr newPort)
+		: mNewPort(newPort), mOldPort(::GetQDGlobalsThePort())
+	{
+		if (mOldPort != newPort)
+			::SetPort(newPort);
+	}
+	
+	~StPortSetter()
+	{
+		if (mOldPort != mNewPort)
+			::SetPort(mOldPort);
+	}
+
+protected:
+	GrafPtr		mNewPort;
+	GrafPtr		mOldPort;
+};
+
+
+
+/** ------------------------------------------------------------
+ *	Utility class for saving, locking, and restoring pixel state
+ */
+
+class StPixelLocker
+{
+public:
+				
+										StPixelLocker(PixMapHandle thePixMap)
+										:	mPixMap(thePixMap)
+										{
+											mPixelState = ::GetPixelsState(mPixMap);
+											::LockPixels(mPixMap);
+										}
+										
+										~StPixelLocker()
+										{
+											::SetPixelsState(mPixMap, mPixelState);
+										}
+
+protected:
+
+
+		PixMapHandle		mPixMap;
+		GWorldFlags			mPixelState;
+
+};
+
+
+#endif // nsGfxUtils_h_