--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/javauis/lcdui_akn/lcdgr/src/CMIDImageDecoder.cpp	Wed Sep 01 12:33:18 2010 +0100
@@ -0,0 +1,232 @@
+/*
+* Copyright (c) 2005 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 "CMIDImageDecoder.h"
+#include "LcdFbsImage.h"
+#include <j2me/jdebug.h>
+
+CMIDImageDecoder::CMIDImageDecoder(RFs& aFsSession, TDisplayMode aDisplayMode)
+        : CActive(CActive::EPriorityStandard), iRFsSession(aFsSession), iDisplayMode(aDisplayMode)
+{
+    CActiveScheduler::Add(this);
+    iRFsSession = aFsSession;
+}
+
+void CMIDImageDecoder::ConstructL()
+{
+    iDecoder = CBufferedImageDecoder::NewL(iRFsSession);
+}
+
+CMIDImageDecoder::~CMIDImageDecoder()
+{
+    Cancel();
+    ASSERT(NULL == iCallback);
+    delete iBitmapImage;
+    delete iDecoder;
+}
+
+void CMIDImageDecoder::AppendL(const TDesC8& aBuffer)
+{
+    TInt err = KErrNone;
+
+    if (iState == EStart)
+    {
+        TRAP(err, iDecoder->OpenL(aBuffer, CImageDecoder::EOptionPngMissingiENDFail));
+
+        if (err == KEComErrNoInterfaceIdentified || err == KErrNotFound)
+        {
+            // If the format is unrecognised AND the first 2 bytes are 0 then we assume it
+            // is a WBMP. This is a requirement of the below defect.
+            // The first two bytes of other formats (e.g. ico) may also begin with 0, 0
+            // but they should have already been recognised by the first call to OpenL
+            if (aBuffer[0] == 0 && aBuffer[1] == 0)
+            {
+                delete iDecoder;
+                iDecoder = NULL;
+                iDecoder = CBufferedImageDecoder::NewL(iRFsSession);
+                DEBUG("* CMIDImageDecoder::AppendL - Format can't be fully identified, assuming this is WBMP");
+                _LIT8(KWBMPMimeType, "image/vnd.wap.wbmp");
+                TRAP(err, iDecoder->OpenL(aBuffer, KWBMPMimeType, CImageDecoder::EOptionPngMissingiENDFail));
+            }
+        }
+
+        if ((err != KErrUnderflow) && (err != KEComErrNoInterfaceIdentified) && (err != KErrNotFound))
+        {
+            //
+            // something's gone wrong that we can't fix by appending more data
+            //
+            User::LeaveIfError(err);
+        }
+        iState = EOpenPending;
+    }
+    else
+    {
+        iDecoder->AppendDataL(aBuffer);
+
+        if (!iDecoder->ValidDecoder())
+        {
+            TRAP(err, iDecoder->ContinueOpenL());
+            if ((err == KErrUnderflow) || (err == KEComErrNoInterfaceIdentified) || (err == KErrNotFound))
+            {
+                // decoder or framework needs more data to determine codec.
+                return;
+            }
+
+            //
+            // If something else has gone wrong then we can't fix by appending more data
+            //
+            User::LeaveIfError(err);
+        }
+    }
+
+    if (iDecoder->ValidDecoder())
+    {
+        if (!iDecoder->IsImageHeaderProcessingComplete())
+        {
+            iDecoder->ContinueProcessingHeaderL();
+            if (iDecoder->IsImageHeaderProcessingComplete())
+            {
+                iState = EOpenComplete;
+            }
+        }
+        else
+        {
+            iState = EOpenComplete;
+        }
+    }
+}
+
+void NullPointer(TAny* aPtr)
+{
+    * static_cast<TAny**>(aPtr) = NULL;
+}
+
+void CMIDImageDecoder::DecodeL(MMIDImageObserver* aCallback)
+{
+    //
+    // If we are asked to decode, but have not yet managed to process the
+    // image header we leave with KErrCorrrupt indicating that we think
+    // the encoded image data is corrupt.
+    //
+    if (iState < EOpenComplete)
+    {
+        User::Leave(KErrCorrupt);
+    }
+    ASSERT(NULL == iCallback);
+    CleanupStack::PushL(TCleanupItem(NullPointer, &iCallback));
+    iCallback = aCallback;
+    ConvertL();
+    CleanupStack::Pop();
+}
+
+void CMIDImageDecoder::Complete(TInt aResult)
+{
+    if (iCallback)
+    {
+        iCallback->DecodeComplete(aResult);
+        iCallback = NULL;
+    }
+}
+
+void CMIDImageDecoder::ConvertL()
+{
+    iState = EConvertPending;
+
+    if (NULL == iBitmapImage)
+    {
+        const TFrameInfo& frameInfo = iDecoder->FrameInfo();
+
+        TSize size = frameInfo.iOverallSizeInPixels;
+
+        // S60: Set the colormode of the bitmap to be exactly as the phone's display.
+        // This will cause CLcdImage class just to duplicate the handle of this image,
+        // and not converting the pixels from the image's original color format to phone's color format.
+        // The image is needed to be in the same color format as the phone's display so BitBlt() is the most efficient.
+        //
+        // Decoding directly to 16MA does not work in 5.0 HW. It works only in emulator and not for JPEG.
+        // The image decoders need to fix this.
+        // We decode to 16MU still and then a conversion from 16MU->16MA will be done
+        //
+        // Insufficient information available to load image in its natural format.
+
+        TDisplayMode colorMode = frameInfo.iFrameDisplayMode;
+        TDisplayMode alphaMode = ENone;
+
+        if (frameInfo.iFlags & TFrameInfo::ETransparencyPossible)
+        {
+            if (frameInfo.iFlags & TFrameInfo::EAlphaChannel)
+            {
+                alphaMode = EGray256;
+            }
+            else
+            {
+                alphaMode = EGray2;
+            }
+        }
+
+        //
+        // This step is the most likely to fail in low memory conditions.
+        //
+        CLcdFbsImage* fbsImage = CLcdFbsImage::NewL(size, colorMode, alphaMode);
+        CleanupStack::PushL(fbsImage);
+        iBitmapImage = new(ELeave) CMIDBitmapImage(*fbsImage);
+        CleanupStack::Pop(fbsImage);
+    }
+
+    CFbsBitmap* colorBitmap = iBitmapImage->ColorBitmap();
+    CFbsBitmap* alphaBitmap = iBitmapImage->AlphaBitmap();
+
+    if (alphaBitmap)
+    {
+        iDecoder->Convert(&iStatus, *colorBitmap, *alphaBitmap, 0);
+    }
+    else
+    {
+        iDecoder->Convert(&iStatus, *colorBitmap, 0);
+    }
+    SetActive();
+}
+
+void CMIDImageDecoder::Dispose()
+{
+    delete this;
+}
+
+MMIDBitmapImage* CMIDImageDecoder::BitmapImage() const
+{
+    return iBitmapImage;
+}
+
+void CMIDImageDecoder::RunL()
+{
+    ASSERT(iState == EConvertPending);
+    Complete(iStatus.Int());
+}
+
+TInt CMIDImageDecoder::RunError(TInt aError)
+{
+    ASSERT(KErrNone == aError);   // should never happen
+    return aError;
+}
+
+void CMIDImageDecoder::DoCancel()
+{
+    ASSERT(iState == EConvertPending);
+    iDecoder->Cancel();
+}
+
+