author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 31 Aug 2010 16:07:35 +0300 | |
branch | RCL_3 |
changeset 51 | e5af45d51884 |
parent 50 | 1801340c26a2 |
child 52 | 31fccae4f8a7 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2006-2008 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: Definition of CHuiVg10RenderPlugin. Rendering plugin for OpenVG 1.0. |
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* |
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*/ |
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#ifndef __HUIVG10RENDERPLUGIN_H__ |
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#define __HUIVG10RENDERPLUGIN_H__ |
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#include <e32base.h> |
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#include <EGL/egl.h> |
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#include <VG/openvg.h> |
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#include "HuiRenderPlugin.h" |
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#include "uiacceltk/HuiPanic.h" |
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#include "uiacceltk/HuiMesh.h" |
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class TEGLState |
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{ |
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public: |
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EGLContext iContext; |
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EGLSurface iReadSurface; |
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EGLSurface iDrawSurface; |
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EGLDisplay iDisplay; |
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}; |
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/** |
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* OpenVG renderer specific state change flags |
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*/ |
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enum THuiVg10GcStateFlags |
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{ |
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EHuiVg10GcStateFlagDirtyMatrixMode = 1, |
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EHuiVg10GcStateFlagDirtyMatrix = 2, |
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EHuiVg10GcStateFlagDirtyPaint = 4, |
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EHuiVg10GcStateFlagDirtyScissor = 8, |
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EHuiVg10GcStateFlagDirtyScissorRects = 0x10, |
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EHuiVg10GcStateFlagDirtyBlendMode = 0x20 |
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}; |
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/* Forward declarations. */ |
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class MHuiRenderSurface; |
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class CHuiVg10PBufferSurface; |
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#ifdef __NVG |
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class CNvgEngine; |
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class MVGImageBinder; |
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#endif |
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/** Number of compatible EGL configurations queried. */ |
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const TInt KVg10ConfigsCount = 2; |
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/** |
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* Macro for asserting that the renderer's state is OK when entering |
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* a function. |
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*/ |
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#define HUI_VG_INVARIANT() __ASSERT_DEBUG(CHuiVg10RenderPlugin::VgError() == VG_NO_ERROR, THuiPanic::Panic(THuiPanic::EVg10Invariant)) |
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/** |
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* Macro for asserting that the latest OpenVG function call did not |
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* fail. You may put this assert after any OpenVG function call. |
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* Has no effect in release builds. |
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* |
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* @param aPanic Panic code to use if the assertion fails. |
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* |
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* @see THuiPanic error codes, for at least the ERendererError. |
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*/ |
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#define HUI_VG_ASSERT_SUCCESS(aPanic) __ASSERT_DEBUG(CHuiVg10RenderPlugin::VgError() == VG_NO_ERROR, THuiPanic::Panic(aPanic)) |
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/** |
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* Rendering plugin for OpenVG 1.0. |
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* |
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* @todo GHuiVg10RenderPlugin should be derived from an abstract |
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* CHuiEglRenderPlugin, which would contain the common EGL-methods. |
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* OpenVG uses EGL, too. |
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*/ |
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NONSHARABLE_CLASS(CHuiVg10RenderPlugin) : public CHuiRenderPlugin |
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{ |
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public: |
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/* Constructors and destructor. */ |
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/** |
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* Constructs a new OpenVG 1.0 rendering plugin instance. |
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*/ |
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static CHuiVg10RenderPlugin* NewL(); |
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/** |
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* Constructs a new OpenVG 1.0 rendering plugin instance and leaves it |
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* on the cleanup stack. |
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*/ |
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static CHuiVg10RenderPlugin* NewLC(); |
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/** |
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* Destructor. |
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*/ |
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virtual ~CHuiVg10RenderPlugin(); |
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/* Methods. */ |
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TBool Allows(THuiRenderPluginAllow aAllow) const; |
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/** |
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* Creates a new rendering surface. |
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* |
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* @param aParams Parameters for the surface. Ends in EHuiRenderSurfaceNone. |
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*/ |
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virtual MHuiRenderSurface* CreateRenderSurfaceL(CHuiDisplay& aDisplay); |
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/** |
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* Creates a new PBuffer surface for off-screen rendering purposes. |
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* |
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* @param aSize Size of the created PBuffer surface. |
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* @return Pointer to the just created PBuffer surface object. |
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*/ |
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virtual CHuiVg10PBufferSurface* CreatePBufferSurfaceL(TSize aSize, TInt aEglBufferType = EGL_PBUFFER_BIT, TInt aBufferColorMode = 0); |
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/** |
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* Creates a new instance of a HUITK graphics context. |
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*/ |
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virtual CHuiGc* CreateGcL(); |
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/** |
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* Creates a new instance of a texture. |
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*/ |
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virtual CHuiTexture* CreateTextureL(const THuiTextureHandle* aExistingTexture = 0); |
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/** |
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* Creates a new instance of a texture manager. |
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*/ |
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virtual CHuiTextureManager* CreateTextureManagerL(CHuiEnv& aEnv); |
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/** |
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* Creates a new instance of an effects engine. |
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*/ |
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virtual CHuiFxEngine* CreateEffectsEngineL(); |
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/** |
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* Creates a new instance of a mesh. Leaves with KErrNotSupported if this renderer |
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* does not support the given mesh type |
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* |
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* @param aMeshType CHuiMesh derived concrete mesh type |
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* |
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* @return Created concrete mesh implementation. |
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*/ |
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virtual CHuiMesh* CreateMeshL(THuiMeshType aMeshType); |
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/** |
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* Creates a new instance of a text mesh. |
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*/ |
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virtual CHuiTextMesh* CreateTextMeshL(); |
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/** |
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* Creates a new instance of a curve path. |
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*/ |
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virtual CHuiCurvePath* CreateCurvePathL(); |
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virtual void DeleteNamedTexture(TUint aName); |
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/** |
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* Notifies this render plugin of a change in current display count. |
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* |
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* @param aCount The current count of displays existing in the HuiToolkit environment. |
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*/ |
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virtual void NotifyDisplayCountL(TUint aCount); |
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/** |
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* Returns the EGL display currently used by the plugin. |
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*/ |
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EGLConfig EglDisplay(); |
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/** |
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* Returns the shared EGL context. |
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* |
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* @param aOtherContext Context that wants to join the shared context. |
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*/ |
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EGLContext EglSharedContext() const; |
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/** |
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* Sets the shared EGL context. |
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* |
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* @param aContext Context that is available for sharing with. |
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*/ |
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void EglSetSharedContext(EGLContext aContext); |
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/** |
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* EGL utility method. See eglChooseConfig. |
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* |
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* @return Number of configurations found. |
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*/ |
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TInt EglChooseConfig(const TInt* aAttribList); |
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/** |
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* EGL utility method. Returns one of the configurations determined by |
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* EglChooseConfig. |
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*/ |
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TInt EglConfig(TInt aIndex); |
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/** |
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* EGL debug method. Prints (using CHuiStatic::Printf) all the attributes of |
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* the specified configuration. |
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*/ |
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void EglPrintConfig(TInt aIndex); |
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/** |
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* Check if the OpenVG context is released. If it is released, |
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* any drawing commands to the context will cause a panic. |
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* |
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* @return ETrue if the OpenVG context has been released. |
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*/ |
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TBool IsReleased() const; |
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/* Static methods. */ |
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/** |
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* GlErrorMessage returns string description for an OpenVG |
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* error code. Can be used to clarify OpenVG errors when debugging. |
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* |
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* Error codes are from from the OpenVG 1.0 specification, chapter 4. |
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* |
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* @param aErrorCode OpenVG error code, usually requested by calling |
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* vgGetError(). |
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* @return Descriptor with the error message. |
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*/ |
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static const TDesC& VgErrorMessage(VGErrorCode aErrorCode); |
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/** |
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* Returns the latest OpenVG error code. Equivalent to calling vgGetError(), |
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* but also prints the GL error code as a debug message. |
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*/ |
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static VGErrorCode VgError(); |
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/** |
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* IsHardwareAccelerated returns boolean value if hardware acceleration |
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* is available. Also stores value to the iIsHardwareAccelerated variable. |
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* |
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* @return ETrue if hardware accelartion is available |
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*/ |
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TBool IsHardwareAccelerated(); |
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/** |
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* Creates a new instance of a canvas graphics context. |
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*/ |
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virtual CHuiCanvasGc* CreateCanvasGcL(); |
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/** |
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* Used to set flags that describe how the openvg state has changed. |
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*/ |
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virtual void AddRestoreStateFlags(TInt aFlags); |
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/** |
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* Return the flags, e.g. for vg10gc to reset its state |
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*/ |
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virtual TInt GetRestoreStateFlags(); |
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/** |
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* Clear the stateflags |
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*/ |
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virtual void ClearRestoreStateFlags(); |
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#ifdef __NVG |
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/** |
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* Getter for NVGEngine, to be used with NVG drawing inside OpenVG plugin |
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* |
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* @return CNvgEngine object |
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*/ |
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CNvgEngine& NvgEngine() const; |
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#endif |
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/** |
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* Getter for hardware configuration flags (rendering quality Accurate / Fast) |
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*/ |
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TInt GetHwConfigurationFlags() const; |
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/** |
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* Getter for texture upload context. This is called by CHuiVg10Texture. |
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*/ |
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TEGLState& GetUploadState() |
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{ |
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return iEGLStateForTextureUpload; |
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} |
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protected: |
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/* Constructors. */ |
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/** |
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* Default constructor. |
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*/ |
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CHuiVg10RenderPlugin(THuiRenderPluginId aId = EHuiRenderPluginVg10); |
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/** |
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* Second-phase constructor. Basicly calls RestoreL(). |
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*/ |
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void ConstructL(); |
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/** |
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* Release resources associated with EGL and OpenVG. |
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* Also, will destroy the default render surface used |
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* for sharing resources. |
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* |
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* @see RestoreL() |
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*/ |
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virtual void Release(); |
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/** |
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* Restores resources needed for EGL/OpenVG rendering. |
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* Finds an EGL display, initializes it for rendering |
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* and restores a default shared render surface that |
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* enables resources to be loaded without an existing |
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* CHuiDisplay. |
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*/ |
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virtual void RestoreL(); |
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|
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private: |
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|
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void ReadAllowsSwapBufferPreserved(); |
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void ReadAllowsVisualPBufferSurfaces(); |
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|
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private: |
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/** The display where the graphics are drawn. */ |
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EGLDisplay iEglDisplay; |
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/** Describes the format, type and size of the color buffers and |
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ancillary buffers for EGLSurface. */ |
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EGLConfig iConfigs[KVg10ConfigsCount]; |
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|
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/** |
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* EGL Context for shared resources. This will allow us to |
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* for instance preload and create textures before actual |
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* rendering surface exists. |
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*/ |
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EGLContext iSharedContext; |
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|
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/** |
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* Dummy PBuffer surface to be used with default context before any |
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* other rendering surfaces exist. |
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*/ |
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CHuiVg10PBufferSurface* iDefaultRenderSurface; |
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TBool iIsHardwareAccelerated; |
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/** |
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* Member that stores the changed flags |
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*/ |
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TInt iStateFlags; |
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#ifdef __NVG |
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/** NVG decoder for plugin classes to use **/ |
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CNvgEngine* iNvgEngine; |
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/** Image binder for NVG-TLV "Group opacity" special case */ |
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MVGImageBinder* iMVGImageBinder; |
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#endif |
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// Hardware configuration, fetched from CenRep |
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TInt iHwConf; |
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TBool iAllowsSwapBufferPreserved; |
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TBool iAllowsVisualPBufferSurfaces; |
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// This is initialized by CHuiVg10Texture during first texture upload |
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TEGLState iEGLStateForTextureUpload; |
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}; |
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#endif // __HUIVG10RENDERPLUGIN_H__ |