--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/vtprotocolplugins/DisplaySink/inc/CVtImageRotatorImpl.h Mon Nov 23 14:47:47 2009 +0200
@@ -0,0 +1,120 @@
+/*
+* Copyright (c) 2004 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description: Image Transforms subsystem.
+*
+*/
+
+
+
+
+#ifndef CVTIMAGEROTATORIMPL_H
+#define CVTIMAGEROTATORIMPL_H
+
+// INCLUDE FILES
+
+#include "cvtimagerotator.h"
+
+// FORWARD DECLARATIONS
+
+class CVtImage;
+
+// CLASS DECLARATIONS
+
+/**
+* Image scaler implementation.
+*
+* @lib videosource.lib
+*/
+class CVtImageRotatorImpl : public CBase
+ {
+ public:
+
+ /**
+ * Sets scaler params.
+ * @param "aParams" Scaling params, including source and target images.
+ * @exception In error situation leaves with one of the system wide
+ * error codes.
+ */
+ void SetSourceTargetL( const CVtImage& aSource, CVtImage& aTarget );
+
+ /**
+ * Method to check whether bitmap heap locking is needed or not during
+ * scaling process.
+ * @exception In error situation leaves with one of the system wide
+ * error codes.
+ * @return ETrue if bitmap heap lock is needed, EFalse otherwise.
+ */
+ TBool NeedHeapLock() const;
+
+ /**
+ * Pure virtual rotation method.
+ * @param "aContinue" When method returns, this parameter will contain
+ * ETrue if new call is needed (i.e. scaling is not yet finished) or
+ * EFalse if scaling is complete.
+ * @return KErrNone or one of the system wide error codes.
+ */
+ virtual TInt Rotate( TBool& aContinue ) = 0;
+
+ /**
+ * Pure virtual method for checking specific rotation angle support.
+ * @param "aAngle" Rotation type that will be needed.
+ * @return ETrue if aAngle is one of the supported rotation types
+ * EFalse otherwise.
+ */
+ virtual TBool SupportsRotationAngle( const CVtImageRotator::TRotationAngle& aAngle ) = 0;
+
+ /**
+ * Sets rotation angle to be used.
+ * @param "aAngle" Rotation type that will be needed.
+ */
+ void SetAngle( const CVtImageRotator::TRotationAngle& aAngle );
+
+ protected:
+
+ /**
+ * C++ constructor.
+ * @param "aAngle" Rotation type that will be needed.
+ */
+ CVtImageRotatorImpl( const CVtImageRotator::TRotationAngle& aAngle );
+
+ private:
+
+ /**
+ * Pure virtual source and target image validation method.
+ * @param "aSource" Constant reference to source image.
+ * @param "aTarget" Constant reference to target image.
+ * @exception If source or target is not valid, this method leaves
+ * with KErrNotSupported.
+ */
+ virtual void ValidateSourceTargetL(
+ const CVtImage& aSource,
+ CVtImage& aTarget ) = 0;
+
+ protected:
+
+ // Source for scaling
+ const CVtImage* iSource; // not owned
+
+ // Target image (will hold scaled source)
+ CVtImage* iTarget; // not owned
+
+ // Selected rotation angle
+ CVtImageRotator::TRotationAngle iAngle;
+ };
+
+#endif // CVTIMAGEROTATORIMPL_H
+
+// End of File
+
+