--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/uiaccelerator_plat/alf_visual_api/inc/alf/alftextureprocessor.h Tue Feb 02 07:56:43 2010 +0200
@@ -0,0 +1,185 @@
+/*
+* Copyright (c) 2006-2007 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: Declares CAlfTextureProcessor class.
+*
+*/
+
+
+
+#ifndef C_ALFTEXTUREPROCESSOR_H
+#define C_ALFTEXTUREPROCESSOR_H
+
+
+#include <e32base.h>
+
+
+/* Forward declarations. */
+class CAlfEnv;
+class CAlfTexture;
+
+/**
+ * CAlfTextureProcessor is a collection of texture filters. Each filter
+ * takes a texture as input, processes it, and produces a new texture as a
+ * result. Examples of processing filters are blurring and shadow generation.
+ * Concrete serverside implementations of this class are rendering plugin specific.
+ * CAlfTextureProcessor is the public, user-friendly way of filtering
+ * textures, because each filtering operation can be applied with a single
+ * function call.
+ * Usage:
+ * @code
+ * //Get texture processor
+ * CAlfTextureProcessor* textureProcessor = &iTxrMgr->TextureProcessor();
+ *
+ * //Blur texture, source and destination textures are same
+ * textureProcessor->BlurL(*tex,*tex);
+ *
+ * @endcode
+ * @see CAlfTextureProcessor::BlurL()
+ * @lib alfclient.lib
+ * @since S60 v3.2
+ *
+ */
+NONSHARABLE_CLASS(CAlfTextureProcessor) : public CBase
+ {
+public:
+
+ /* Types. */
+
+ /** @beginAPI */
+
+ /** Flags for blur filtering. */
+ enum TBlurFlags
+ {
+ /** Default blurring settings. */
+ EBlurFlagDefault = 0,
+
+ /** Include an alpha channel in the result. */
+ EBlurFlagAlpha = 1,
+
+ /** Retain extra space for edges so that the blurred edges that will
+ always remain within the bounds of the resulting texture. Note
+ that when the blurred texture is drawn, it has to be expanded
+ so that it will match the original images content. */
+ EBlurFlagExpandEdges = 2,
+
+ /** Replace source color RGB with white. Note that this flag is
+ mutually exclusive with flag EBlurFlagBlack. If both are defined
+ then this flag overrides the EBlurFlagBlack. */
+ EBlurFlagWhite = 4,
+
+ /** Replace source color RGB with black. Note that this flag is
+ mutually exclusive with flag EBlurFlagWhite. If both are defined
+ then this flag overridden by EBlurFlagWhite. */
+ EBlurFlagBlack = 8,
+
+ /** High quality blur. The blurring process is done twice, and the
+ results are averaged. */
+ EBlurFlagHighQuality = 16,
+ };
+
+ /** @endAPI */
+
+
+ /* Destructor. */
+
+ /**
+ * Destructor.
+ */
+ virtual ~CAlfTextureProcessor();
+
+ /**
+ * Constructor.
+ */
+ static CAlfTextureProcessor* NewL(CAlfEnv& aEnv);
+
+ /**
+ * Constructor.
+ */
+ static CAlfTextureProcessor* NewLC(CAlfEnv& aEnv);
+
+ /* Methods. */
+
+ /** @beginAPI */
+
+ /**
+ * Blurs a texture. The dimensions of the resulting image are chosen
+ * automatically. Returns a pointer to a new texture which contains
+ * a blurred version of the texture. Ownership of the new texture is
+ * transferred to the caller.
+ *
+ * Note that the algorithm used for blurring favors speed over accuracy.
+ * This means that when hardware acceleration is available, the blurring
+ * can be redone for each frame. However, the quality of the blurring
+ * may not be optimal. For example, color range reduction and pixel
+ * artifacts may be visible.
+ *
+ * @param aSrc Source texture to be blurred. Not modified.
+ * @param aDest Destination texture to be blurred. Modified. Allowed to be the same as aSrc.
+ * @param aFilterSize Size of the blurring filter. 3 = 3x3 filter, 4 = 4x4 filter.
+ * @param aFlags Flags that modify the filter's parameters. @see TBlurFlags
+ */
+ IMPORT_C void BlurL(const CAlfTexture& aSrc,
+ CAlfTexture& aDest,
+ TInt aFilterSize = 3, TInt aFlags = 0);
+
+ /**
+ * Blurs a texture. The dimensions of the resulting image are as close to
+ * aPreferredSize as possible, depending on the limitations of the
+ * implementation. Returns a pointer to a new texture which contains
+ * a blurred version of the texture. Ownership of the new texture is
+ * transferred to the caller.
+ *
+ * Note that the algorithm used for blurring favors speed over accuracy.
+ * This means that when hardware acceleration is available, the blurring
+ * can be redone for each frame. However, the quality of the blurring
+ * may not be optimal. For example, color range reduction and pixel
+ * artifacts may be visible.
+ *
+ * @param aSrc Source texture to be blurred. Not modified.
+ * @param aDest Destination texture to be blurred. Modified. Allowed to be the same as aSrc.
+ * @param aPreferredSize Preferred size of the result.
+ * @param aFilterSize Size of the blurring filter. 3 = 3x3 filter, 4 = 4x4 filter.
+ * @param aFlags Flags that modify the filter's parameters. @see TBlurFlags
+ */
+ IMPORT_C void BlurL(const CAlfTexture& aSrc,
+ CAlfTexture& aDest,
+ const TSize& aPreferredSize,
+ TInt aFilterSize = 3, TInt aFlag = 0);
+
+ /** @endAPI */
+
+protected:
+
+ /* Constructors. */
+
+ /**
+ * Constructor.
+ */
+ CAlfTextureProcessor();
+
+ /**
+ * Second-phase constructor.
+ */
+ void ConstructL(CAlfEnv& aEnv);
+
+
+private:
+
+ /** Private data */
+ struct TPrivateData;
+ TPrivateData* iData;
+
+ };
+
+#endif // C_ALFTEXTUREPROCESSOR_H