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/*
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* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description: Internal binding API for OpenVG, used for managing OpenVG rendering contexts.
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*
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*/
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#ifndef _OPENVG_CONTEXT_SYMBIAN_H
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#define _OPENVG_CONTEXT_SYMBIAN_H
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#include "vg/vgcontext.h"
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#include <fbs.h>
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/**
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* OpenVG is initialized with the selected size and colorspace. A single rendering context is created and
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* made active (there is no support for multiple contexts). Single rendering (back buffer) surface is created
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* by OpenVG and made active for Read and Write.
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* @param aSize Size of the rendering surface (back buffer) size in pixels.
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* @param aColorSpace Color space to be used. Must be either VGI_COLORSPACE_LINEAR or VGI_COLORSPACE_SRGB.
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* @return Returns KErrNone if initialization was successful. Returns error code KErrArgument
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* if width or height are negative. Returns error code KErrNoMemory if there is insufficient
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* free memory to complete the initialization (smaller size for back buffer or smaller antialiasing setting may
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* work). Returns error code KErrAlreadyExists if the surface and context already exists in this
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* process & thread (call VGITerminate to reset). Returns error code KErrNotSupported
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* if the given colorspace is not supported by the implementation.
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*/
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IMPORT_C TInt VGISymbianInitialize( TSize aSize, VGIColorSpace aColorSpace );
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/**
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* OpenVG is initialized with the selected size and colorspace. A single rendering context is created and
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* made active (there is no support for multiple contexts). Single rendering (back buffer) surface is created
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* by OpenVG and made active for Read and Write.
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* @param aSize Size of the rendering surface (back buffer) size in pixels.
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* @param aColorSpace Color space to be used. Must be either VGI_COLORSPACE_LINEAR or VGI_COLORSPACE_SRGB.
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* @return Returns KErrNone if initialization was successful. Returns error code KErrArgument
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* if width or height are negative. Returns error code KErrNoMemory if there is insufficient
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* free memory to complete the initialization (smaller size for back buffer or smaller antialiasing setting may
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* work). Returns error code KErrAlreadyExists if the surface and context already exists in this
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* process & thread (call VGITerminate to reset). Returns error code KErrNotSupported
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* if the given colorspace is not supported by the implementation.
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*/
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IMPORT_C TInt VGISymbianInitializeEx( TSize aSize, VGIColorSpace aColorSpace, TBool aPremultiplied, TBool aConformant );
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/**
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* Copies the current contents of the internal back buffer to the given target buffer using the given stride
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* and format. Back buffer contents may be undefined after this function as it marks the start of new frame.
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* All target formats are supported by all implementations and the format bit pattern definitions match the
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* Symbian formats (EColo64K, EColor16M, EColor16MU, EColor16MA). Target buffer memory is assumed to be generic
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* system memory (MMU mapped).
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* @param aBitmap Target buffer where the current back buffer is copied to.
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* The implementation uses internal back buffer and this target buffer is used only
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* during the execution of this method.
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* @param aMaskBitmap Target buffer for the 8-bits per pixel destination alpha output
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* (only written to by the method if parameter is not NULL and format is other than EColor16MA)
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* @param aHint Specify how to process transparent pixels.
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* Value VGI_SKIP_TRANSPARENT_PIXELS means transparent pixels are not copied to the target buffer.
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* Value VGI_COPY_TRANSPARENT_PIXELS means every pixel transparent or not is copied to the target buffer.
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* @return Returns KErrNone if copying completed successfully. Returns error code KErrArgument
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* if aBitmap is NULL or if aHint is neither VGI_SKIP_TRANSPARENT_PIXELS nor VGI_COPY_TRANSPARENT_PIXELS.
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* Returns error code KErrNoMemory if there is insufficient
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* free memory to complete the copying (before returning this error code the implementation internally
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* calls VGISymbianTerminate() and current context and surface are lost.
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*/
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IMPORT_C TInt VGISymbianCopyToBitmap( CFbsBitmap *aBitmap, CFbsBitmap *aMaskBitmap = NULL, VGICopyToTargetHint aHint = VGI_COPY_TRANSPARENT_PIXELS );
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/**
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* Rendering surface and context are freed and may not be used after call to this method. OpenVG is terminated (all
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* other related resources are freed). If this method is called before VGISymbianInitialize, or VGISymbianTerminate is called after
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* already being called, this method does nothing. In other words it is safe to call VGISymbianTerminate() multiple times
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* sequentially.
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*/
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IMPORT_C void VGISymbianTerminate();
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/**
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* Resizes the back buffer to have the given width and height . This method should always be used to resize the back buffer as in
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* many implementations the resize operation can be handled more efficiently than a plain delete old, create new method.
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* Old context is preserved and can be used after the resize operation. Contents of the new frame buffer are UNDEFINED.
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* @param aSize Size of the rendering surface (back buffer) after resize operation, size in pixels.
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* @return Returns KErrNone if resize operation was successful.
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* Returns error code KErrPermissionDenied if an image is currently set as the render target.
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* Returns error code KErrArgument if width or height are negative or error code KErrNoMemory if there is insufficient free memory
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* to allocate the back buffer of given size (smaller size may work).
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* @note: if KErrNoMemory is returned, the original surface is lost and VGISymbianTerminate is called internally (context & surface is lost)
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*/
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IMPORT_C TInt VGISymbianResize( TSize aSize );
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/**
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* Redirects rendering to an image.
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* @param aImage Image to be set as the render target.
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* @return Returns KErrNone if successful.
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* Returns error code KErrBadHandle if aImage is not a valid image handle, or is not shared with the current context.
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* Returns error code KErrNotSupported if aImage is not of the same format as the "master surface".
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* Returns error code KErrInUse if aImage shares storage with any other image (via use of the vgChildImage function),
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* or is set as a paint pattern image on a paint object.
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* Returns error code KErrNoMemory if there is insufficient free memory to perform the operation.
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* @note: if KErrNoMemory is returned, the original surface is lost and VGISymbianTerminate is called internally (context & surface is lost)
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*/
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IMPORT_C TInt VGISymbianBindToImage( VGImage aImage );
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/**
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* Reset the "master surface" as current render target .
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* @return Returns KErrNone if successful.
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* Returns error code KErrNoMemory if there is insufficient free memory to perform the operation.
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* @note: if KErrNoMemory is returned, the original surface is lost and VGITerminate is called internally (context & surface is lost)
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*/
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IMPORT_C TInt VGISymbianUnBindImage();
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#endif /* _OPENVG_CONTEXT_SYMBIAN_H */
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