author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Mon, 04 Oct 2010 02:31:51 +0300 | |
changeset 194 | 18f84489a694 |
parent 152 | 9f1c3fea0f87 |
permissions | -rw-r--r-- |
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// Copyright (c) 2009-2010 Nokia Corporation and/or its subsidiary(-ies). |
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// |
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// Permission is hereby granted, free of charge, to any person obtaining a |
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// copy of this software and/or associated documentation files (the |
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// "Materials"), to deal in the Materials without restriction, including |
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// without limitation the rights to use, copy, modify, merge, publish, |
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// distribute, sublicense, and/or sell copies of the Materials, and to |
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// permit persons to whom the Materials are furnished to do so, subject to |
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// the following conditions: |
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// |
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// The above copyright notice and this permission notice shall be included |
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// in all copies or substantial portions of the Materials. |
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// |
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// THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
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// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
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// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
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// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
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// MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS. |
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// |
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// Description: |
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// Display Update Abstract Interface |
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// |
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// |
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|
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#ifndef OPENWFC_RI_DISPLAY_UPDATE_H |
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#define OPENWFC_RI_DISPLAY_UPDATE_H |
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|
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#include <e32base.h> |
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#include <graphics/symbianstream.h> |
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|
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/** |
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* \brief Abstract interface used by OPENWF-C SI in order to display |
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* the composed content |
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* |
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*/ |
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|
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class MOpenWFC_RI_Display_Update |
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{ |
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public: |
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/** |
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* Retrieves one of the display attributes |
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* |
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* @param aAttributeId The attribute ID to be retrieved. |
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* @param aAttribute Pointer to the attribute to be retrieved |
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* @param aAttributeSize Size in bytes of attribute to be retrieved |
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* |
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* @return KErrNone or a system wide error |
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*/ |
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virtual TInt GetAttribute(TInt aAttributeId, TAny* aAttribute, TInt aAttributeSize) = 0; |
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|
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/** |
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* Sets one of the display attributes |
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* |
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* @param aAttributeId The attribute ID to be retrieved. |
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* @param aAttribute Pointer to the attribute to be retrieved |
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* @param aAttributeSize Size in bytes of attribute to be retrieved |
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* |
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* @return KErrNone or a system wide error |
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*/ |
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virtual TInt SetAttribute(TInt aAttributeId, TAny* aAttribute, TInt aAttributeSize) = 0; |
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|
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/** |
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* Commits the display attribute. |
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* |
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* @return KErrNone or a system wide error |
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*/ |
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virtual TInt CommitAttribute() = 0; |
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|
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/** |
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* Associates a stream with the topmost display layer (overlay). |
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* Must have been called successfully before calling UpdateDisplay. |
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* Also used to specify the composed output stream as the display layer. |
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* Note that currently this method is called each composition, |
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* but it is only necessary to call it when the top stream changes. |
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* |
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* This method may fail if any attributes of the stream cannot be handled by the display device. |
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* The aNonTrivialAttributes is a zero-terminated list of attribute keys and values |
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* that do not match the trivial cases for direct composition, but that some devices may support, |
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* representing eg mirror, scale, rotation, offset, or oversize cases. |
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* The implementation of this method will stop processing the list and fail if it does not recogise |
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* any of the keys or cannot accept the value associated with that key for direct display. |
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* All platforms should accept an empty or NULL list, but some may simply fail if the list is non-empty, |
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* so the caller should keep the list brief. |
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* |
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* If the method fails, then the caller must compose the content into a simpler format, |
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* and call SetTopLayerSurface again before calling UpdateDisplay. |
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* It is expected that there will be at least 1 pre-determined simpler format or stream handle that will always succeed. |
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* |
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* @param aStream The stream Id to be associated with the topmost layer |
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* @param aNonTrivialAttributes Attribute integer pair list of any non-trivial attribute values. |
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* |
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* @return KErrNone or a system wide error |
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*/ |
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virtual TInt SetTopLayerSurface(SymbianStreamType aStream,TInt* aNonTrivialAttributes=NULL) = 0; |
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/** |
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* Associates a stream with a specific layer. |
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* Must have been called successfully before calling UpdateDisplay. |
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* Note that currently this method is called each composition, |
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* but it is only necessary to call it when the stream stack changes, |
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* when all layers should be re-specified in turn before the next UpdateDisplay call. |
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* |
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* This method may fail if any attributes of the stream cannot be handled by the display device. |
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* The aNonTrivialAttributes is a zero-terminated list of attribute keys and values |
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* that do not match the trivial cases for direct composition, but that some devices may support, |
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* representing eg mirror, scale, rotation, offset, undersize or oversize cases, |
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* and could be used to represent multiple layers. |
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* The implementation of this method will fail if it does not recogise any of the keys |
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* or cannot accept the value associated with that key for direct display. |
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* All platforms should accept an empty or NULL list, but some may simply fail if the list is non-empty, |
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* so the caller should keep the list brief. |
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* |
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* If the method fails, then the caller must compose the content into a simpler format, |
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* and call SetTopLayerSurface (or SetLayerSurface) again before calling UpdateDisplay. |
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* |
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* @param aLayer The layer id. The layer number "0" is the topmost layer. |
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* @param aStream The stream Id to be associated with the specified layer, or SYMBIAN_INVALID_HANDLE. |
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* @param aNonTrivialAttributes Attribute integer pair list of any non-trivial attribute values. |
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* |
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* @return KErrNone or a system wide error |
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*/ |
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virtual TInt SetLayerSurface(TInt aLayer, SymbianStreamType aStream,TInt* aNonTrivialAttributes=NULL) = 0; |
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|
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/** |
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* Update (flush/post) the screen |
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* |
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* @return KErrNone or a system wide error |
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*/ |
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virtual TInt UpdateDisplay() = 0; |
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}; |
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#endif // OPENWFC_RI_DISPLAY_UPDATE_H |