--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/ui/commandhandlers/commoncommandhandlers/src/glxcommandhandlerrotate.cpp Fri Mar 19 09:28:59 2010 +0200
@@ -0,0 +1,173 @@
+/*
+* Copyright (c) 2009 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:
+*
+*/
+
+#include <mpxcollectionpath.h>
+#include <mglxmedialist.h>
+#include <glxcommandfactory.h>
+#include <GlxCommandHandlerRotate.h>
+#include <QDebug>
+#include <ExifRead.h>
+
+GlxCommandHandlerRotate::GlxCommandHandlerRotate()
+{
+ qDebug("GlxCommandHandlerRotate::GlxCommandHandlerRotate() ");
+}
+
+GlxCommandHandlerRotate::~GlxCommandHandlerRotate()
+{
+ qDebug("GlxCommandHandlerRotate::~GlxCommandHandlerRotate() ");
+}
+
+CMPXCommand* GlxCommandHandlerRotate::CreateCommandL(TInt aCommandId, MGlxMediaList& aMediaList, TBool& aConsume) const
+{
+ Q_UNUSED(aCommandId);
+ Q_UNUSED(aConsume);
+ qDebug("GlxCommandHandlerRotate::CreateCommandL");
+ return NULL;
+}
+
+void GlxCommandHandlerRotate::DoExecuteCommandL(TInt aCommandId, MGlxMediaList& aMediaList, TBool& aConsume)
+{
+ Q_UNUSED(aCommandId);
+ Q_UNUSED(aConsume);
+ qDebug("GlxCommandHandlerRotate::DoExecuteCommandL");
+ const TGlxMedia& item = aMediaList.Item( aMediaList.FocusIndex() );
+ TFileName uri;
+ uri.Copy(item.Uri());
+ TRAPD(err,RotateImageL(uri));
+ if(err != KErrNone) {
+ qDebug("GlxCommandHandlerRotate::DoExecuteCommandL Exif Update failed");
+
+ }
+}
+void GlxCommandHandlerRotate::RotateImageL(TFileName aFileToBeRotated)
+{
+ //Start an IFS session
+ //File system
+ User::LeaveIfError(iFs.Connect());
+ //first initialize the Exif Writer which is responsible for reading and writing the Exif Data
+ //Will leave here itself in cases where the Exif data is absent
+ InitializeExifWriterL(aFileToBeRotated);
+ //read the Orientation tag stored in the Exif Data
+ TUint16 initialOrientation = ReadImageOrientationL();
+ //as the image is rotated to 90 degrees clockwise calculate the new orientation by adding that angle
+ TUint16 finalOrientation = CalculateFinalOrientationL(initialOrientation);
+ // Set the Final Orientation on the file
+ SetImageOrientationL(finalOrientation);
+ // Clear the sessions acquired
+ DestroyExifWriter();
+ //close the File Session
+ iFs.Close();
+}
+
+void GlxCommandHandlerRotate::InitializeExifWriterL(TFileName aFileToBeRotated)
+{
+ User::LeaveIfError(iFileHandle.Open(iFs,
+ aFileToBeRotated, EFileWrite));
+ TInt filesize;
+ User::LeaveIfError(iFileHandle.Size(filesize));
+ iExifData = HBufC8::NewL(filesize);
+ TPtr8 ptr(iExifData->Des());
+ User::LeaveIfError(iFileHandle.Read(ptr));
+ iExifWriter = CExifModify::NewL(*iExifData,CExifModify::EModify,CExifModify::ENoJpegParsing);
+}
+
+TUint16 GlxCommandHandlerRotate::ReadImageOrientationL()
+{
+ TUint16 initialOrientation;
+ const CExifRead* exifReader = iExifWriter->Reader(); //not owned
+ User::LeaveIfError(exifReader->GetOrientation(initialOrientation));
+ qDebug("GlxCommandHandlerRotate::ReadImageOrientationL initial orientation = %d", initialOrientation);
+ return (initialOrientation);
+}
+
+TUint16 GlxCommandHandlerRotate::CalculateFinalOrientationL(TUint16 aInitialOrientation)
+{
+ /*
+ * possible orientation state with angles for rotation
+ * Possible Angles 0 - 90 - 180 - 270
+ * Possible states 1 - 8 - 3 - 6 without a Flip
+ * Possible states 2 - 7 - 4 - 5 when Flip is on
+ */
+ TUint16 finalOrientation = aInitialOrientation;
+ if(aInitialOrientation >8 ) {
+ //invalid orientation passed Leave
+ User::Leave(KErrCorrupt);
+ }
+ TInt rotOffset = 1;
+ TInt isOrientationOdd = aInitialOrientation % 2;
+ TInt initStateIndex = 0;
+ TInt finalStateIndex = 0;
+ //Setting the orientation states for the initial unflipped orientation combinations
+ TInt orientationStateArray[] = {1,8,3,6};
+ //Seting the index for current orientation
+ if(aInitialOrientation < 3)
+ {
+ initStateIndex = 0;
+ }
+ else if(aInitialOrientation >= 3 && aInitialOrientation < 5)
+ {
+ initStateIndex = 2;
+ }
+ else if(aInitialOrientation >= 5 && aInitialOrientation < 7)
+ {
+ initStateIndex = 3;
+ }
+ else if(aInitialOrientation >= 7 && aInitialOrientation <= 8)
+ {
+ initStateIndex = 1;
+ }
+ //Calculating the final orientation using the cyclic orientationStateArray.
+ //folding final index so that it behaves like a cyclic machine
+ finalStateIndex = (initStateIndex+rotOffset)%4;
+ finalOrientation = orientationStateArray[finalStateIndex];
+ //Checking if a Flip was present
+ if(aInitialOrientation>4 && isOrientationOdd )
+ {
+ finalOrientation -= 1;
+ }
+ if(aInitialOrientation<5 && !isOrientationOdd)
+ {
+ finalOrientation += 1;
+ }
+ qDebug("GlxCommandHandlerRotate::CalculateFinalOrientationL final orientation = %d", finalOrientation);
+ return finalOrientation;
+}
+
+void GlxCommandHandlerRotate::SetImageOrientationL(TUint16 aFinalOrientation)
+{
+ iExifWriter->SetOrientationL(aFinalOrientation);
+ HBufC8* modifiedexifData=NULL;
+ modifiedexifData = iExifWriter->WriteDataL(iExifData->Des());
+ User::LeaveIfError(iFileHandle.Write(0,modifiedexifData->Des()));
+ delete modifiedexifData;
+}
+
+void GlxCommandHandlerRotate::DestroyExifWriter()
+{
+ iFileHandle.Close();
+ if(iExifData != NULL)
+ {
+ delete iExifData;
+ iExifData = NULL;
+ }
+ if(iExifWriter != NULL)
+ {
+ delete iExifWriter;
+ iExifWriter = NULL;
+ }
+}