1 <?xml version="1.0" encoding="utf-8"?>

     2 <!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->

     3 <!-- This component and the accompanying materials are made available under the terms of the License 

     4 "Eclipse Public License v1.0" which accompanies this distribution, 

     5 and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->

     6 <!-- Initial Contributors:

     7     Nokia Corporation - initial contribution.

     8 Contributors: 

     9 -->

    10 <!DOCTYPE concept

    11   PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">

    12 <concept xml:lang="en" id="GUID-294E84BB-65D0-5275-848E-1960B201A371"><title>Creating and Drawing to an Off-Screen Bitmap</title><prolog><metadata><keywords/></metadata></prolog><conbody><p>This topic provides an example that shows the creation of a bitmap, the creation of an off-screen graphics device and graphics context for it, and the use of that graphics context to draw to the bitmap. Once a graphics context has been established for the bitmap, any of the GDI drawing functions can be used on the bitmap, as if it were the more common graphics context—the screen. </p> <codeblock id="GUID-E7A1651B-4F87-5156-9CDE-F8205323DB8E" xml:space="preserve">// Create a bitmap to be used off-screen.

    13 CFbsBitmap* offScreenBitmap = new (ELeave) CFbsBitmap();

    14 CleanupStack::PushL(offScreenBitmap);

    15 User::LeaveIfError(offScreenBitmap->Create(TSize(100,100),EColor256));

    16      

    17 // Create an off-screen device and context.

    18 CGraphicsContext* bitmapContext=NULL;

    19 CFbsBitmapDevice* bitmapDevice = CFbsBitmapDevice::NewL(offScreenBitmap);

    20 CleanupStack::PushL(bitmapDevice);

    21 User::LeaveIfError(bitmapDevice->CreateContext(bitmapContext));

    22 CleanupStack::PushL(bitmapContext);

    23      

    24 // Draw something on the bitmap.

    25 TRect rect(0,0,100,100);

    26 bitmapContext->SetBrushColor(KRgbRed);

    27 bitmapContext->SetBrushStyle(CGraphicsContext::ESolidBrush);

    28 bitmapContext->DrawRect(rect); // a filled red rectangle

    29      

    30 // Now do what you want with it, such as blitting to the screen.

    31 gc.BitBlt(TPoint(20,20),offScreenBitmap);

    32     

    33 // Cleanup.

    34 CleanupStack::PopAndDestroy(3);

    35 ...</codeblock> </conbody><related-links><link href="GUID-AFE8A9CC-E026-5396-8E0C-616338B5F5C3.dita"><linktext>BitGDI Tutorials</linktext> </link> <link href="GUID-EAAD1719-C02C-5705-A5C3-993E36441BE6.dita"><linktext>BitGDI Component</linktext> </link> </related-links></concept>