/*

* Copyright (c) 2006-2008 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:   OpenVG 1.0 render surface implementation.

*

*/

#include "HuiVg10RenderSurface.h"

#include "HuiVg10RenderPlugin.h"

#include "uiacceltk/HuiSegmentedTexture.h"

#include "uiacceltk/HuiDisplay.h"

#include "uiacceltk/HuiStatic.h"

#include "uiacceltk/HuiUtil.h"

#include <coecntrl.h>

#include <w32std.h>

#include <gdi.h>

#include "uiacceltk/HuiProbe.h"

#include "uiacceltk/HuiEnv.h"

#include <M3G/m3g_core.h>

CHuiVg10RenderSurface* CHuiVg10RenderSurface::NewL(CHuiDisplay& aDisplay)

    {

    CHuiVg10RenderSurface* self = CHuiVg10RenderSurface::NewLC(aDisplay);

    CleanupStack::Pop(self);

    return self;

    }

CHuiVg10RenderSurface* CHuiVg10RenderSurface::NewLC(CHuiDisplay& aDisplay)

    {

    CHuiVg10RenderSurface* self = new (ELeave) CHuiVg10RenderSurface(aDisplay);

    CleanupStack::PushL(self);

    self->ConstructL();

    return self;

    }

CHuiVg10RenderSurface::CHuiVg10RenderSurface(CHuiDisplay& aDisplay)

        : iDisplay(&aDisplay)

    {

    HUI_PROBE_ASSOCIATE_WITH_CURRENT_SESSION

    HUI_PROBE_REPORT_CONSTRUCTED

    }

void CHuiVg10RenderSurface::ConstructL()

    {

    HUI_DEBUG(_L("CHuiVg10RenderSurface::ConstructL() - Constructing OpenVG 1.0 Rendering surface."));

    // Size of the surface.

    iSize = iDisplay->Size();

    // Create egl context and rendering surface

    iEglContext = iEglSurface  = NULL;

    iBoundTexture = NULL;

    RestoreL();

    HUI_DEBUG(_L("CHuiVg10RenderSurface::ConstructL() - Construction succeeded."));

}

CHuiVg10RenderSurface::~CHuiVg10RenderSurface()

    {

    Release();

    iDisplay = NULL;

    HUI_PROBE_REPORT_DESTRUCTED

    }

CHuiDisplay& CHuiVg10RenderSurface::Display() const

    {

    return *iDisplay;

    }

TUint CHuiVg10RenderSurface::Flags() const

	{    

	TBool useDirtyAreas = CHuiStatic::Renderer().Allows(EHuiRenderPluginAllowSwapBufferPreserve);    	

    if (useDirtyAreas)

	    {

	    return MHuiRenderSurface::EFlagUseDirtyRects;

	    }

	else

	    {

	    return MHuiRenderSurface::EFlagNone;

	    }

	}

TBool CHuiVg10RenderSurface::GetScreenOrigin(TPoint& aOrigin) const

    {

    if(iDisplay && iDisplay->NativeControl())

        {

        aOrigin = iDisplay->NativeControl()->PositionRelativeToScreen();

        return ETrue;

        }

    return EFalse;

    }

static void CreateConstEglAttribs(int& i, EGLint* attribList)

    {

    const TInt BITS_PER_CHANNEL = 8;

    attribList[i++] = EGL_RED_SIZE;

    attribList[i++] = BITS_PER_CHANNEL;

    attribList[i++] = EGL_GREEN_SIZE;

    attribList[i++] = BITS_PER_CHANNEL;

    attribList[i++] = EGL_BLUE_SIZE;

    attribList[i++] = BITS_PER_CHANNEL;

    attribList[i++] = EGL_ALPHA_SIZE;

    attribList[i++] = BITS_PER_CHANNEL;

    attribList[i++] = EGL_SURFACE_TYPE;

    TBool useDirtyAreas = CHuiStatic::Renderer().Allows(EHuiRenderPluginAllowSwapBufferPreserve);       

    if (useDirtyAreas)

        {    

        attribList[i++] = EGL_WINDOW_BIT | EGL_PBUFFER_BIT | EGL_SWAP_BEHAVIOR_PRESERVED_BIT;

        }

    else

        {

        attribList[i++] = EGL_WINDOW_BIT | EGL_PBUFFER_BIT;

        }

    attribList[i++] = EGL_RENDERABLE_TYPE;

    attribList[i++] = EGL_OPENVG_BIT;

    }

EGLConfig CHuiVg10RenderSurface::DetermineConfig()

    {

	EGLint attribList[20];  // reserve enough space for configurations	

	int i = 0;

	// Get default properties for the wanted EGLSurface.

    CreateConstEglAttribs(i, attribList);

	// Terminate attribute list

	attribList[i++] = EGL_NONE;

    CHuiVg10RenderPlugin& render = CHuiStatic::Vg10Renderer();

    // Choose an EGLConfig that best matches to the properties in attribList.

    TInt numOfConfigs = render.EglChooseConfig(attribList);

    if(!numOfConfigs)

        {

        TInt eglerr = eglGetError();

        HUI_DEBUG2(_L("CHuiVg10RenderSurface::DetermineConfig() - eglChooseConfig failed, no required EGL configuration found. Cause: %S (error %i). Panicking."), &CHuiVg10RenderSurface::EglErrorMessage(eglerr), eglerr);

        HUI_PANIC(THuiPanic::ERenderSurfaceUnknownDisplayMode);

        }

    HUI_DEBUG1(_L("CHuiVg10RenderSurface::DetermineConfig() - Got %i configs."), numOfConfigs);

    // Print the attributes of the selected config to log file.

    render.EglPrintConfig(0);

    // Choose the best EGLConfig. EGLConfigs returned by eglChooseConfig

    // are sorted so that the best matching EGLConfig is first in the list.

    return render.EglConfig(0);

    }

EGLSurface CHuiVg10RenderSurface::CreateSurface(EGLConfig aConfig)

    {

	EGLint* attriblistPtr = NULL;

#ifndef __WINS__ // \todo instead of "#ifndef" should make a check if alpha mode is supported

    // Create a rendering surface.

    EGLint attriblist[] = 

        {

        EGL_VG_ALPHA_FORMAT, EGL_VG_ALPHA_FORMAT_PRE,

        EGL_NONE

        };

    attriblistPtr = &attriblist[0];

#endif

    if(iDisplay->NativeWindow())

        {

        HUI_DEBUG(_L("CHuiVg10RenderSurface::CreateSurface() - Attempting to create a real window surface."));

        EGLSurface surf = eglCreateWindowSurface(iEglDisplay, aConfig,

                                      iDisplay->NativeWindow(), attriblistPtr);

        TBool useDirtyAreas = CHuiStatic::Renderer().Allows(EHuiRenderPluginAllowSwapBufferPreserve);       

        if (useDirtyAreas)

            {    

            eglSurfaceAttrib(iEglDisplay, surf, EGL_SWAP_BEHAVIOR, EGL_BUFFER_PRESERVED );

            }

        return surf;

        }

    else

        {

        // Pbuffer attributes.

        EGLint pbufferAttribList[] =

            {

            EGL_WIDTH,      iSize.iWidth,

            EGL_HEIGHT,     iSize.iHeight,

            EGL_NONE

            };

        HUI_DEBUG(_L("CHuiVg10RenderSurface::CreateSurface() - Attempting to create a pbuffer surface."));

        return eglCreatePbufferSurface(iEglDisplay, aConfig, pbufferAttribList);

        }

    }

TSize CHuiVg10RenderSurface::Size() const

    {

    return iSize;

    }

void CHuiVg10RenderSurface::SetSizeL(const TSize& aSize)

    {

    iSize = aSize;

    if(!iDisplay->NativeWindow())

        {

        // Recreate pbuffer surfaces.

        eglMakeCurrent(EGL_NO_DISPLAY, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);

        // Recreate the rendering surface.

        eglDestroySurface(iEglDisplay, iEglSurface);

        iEglSurface = CreateSurface(DetermineConfig());

        if(iEglSurface == EGL_NO_SURFACE)

            {

            TInt eglerr = eglGetError();

            switch (eglerr)

                {

                case EGL_BAD_ALLOC:

                    HUI_DEBUG2(_L("CHuiVg10RenderSurface::SetSizeL() - ERROR! Failed to (re)create surface having size (%ix%i). Out of memory."), 

                               aSize.iWidth, aSize.iHeight);

                    User::Leave(KErrNoMemory);

                default:

                    HUI_DEBUG4(_L("CHuiVg10RenderSurface::SetSizeL() - ERROR! Failed to (re)create surface having size (%ix%i).Cause: %S (EGL error code: %i). Leaving."), 

                                aSize.iWidth, aSize.iHeight, 

                                &CHuiVg10RenderSurface::EglErrorMessage(eglerr), eglerr);

                case EGL_SUCCESS: // indicates that no error was recorded, but still the CreateSurface call failed (=> unable to continue!)

                    User::Leave(KErrNotSupported);

                }

            }

        }

    }

void CHuiVg10RenderSurface::MakeCurrent()

	{

	// No need to change the current render surface if this render surface is current already.

	if(CHuiStatic::CurrentRenderSurface() != ((MHuiRenderSurface*)this))

		{

		CHuiEnv* env = CHuiEnv::Static();  

		if (env && env->iSwapObserver)

		    {    

            env->iSwapObserver->ReleaseWindowServer();

		    }

		eglMakeCurrent(iEglDisplay, iEglSurface, iEglSurface, iEglContext);

        if (env && env->iSwapObserver)

            {

            env->iSwapObserver->ReleaseWindowServer(EFalse);

            }

		TInt eglerr = eglGetError();

		if(eglerr != EGL_SUCCESS)

			{

			HUI_DEBUG3(_L("CHuiVg10RenderSurface::MakeCurrent() - Error in switching on the render surface, EGLDisplay: %i, EGLSurface: %i, EGLContext: %i."),

				iEglDisplay, iEglSurface, iEglContext);

			HUI_DEBUG2(_L("CHuiVg10RenderSurface::MakeCurrent() - Could not switch this rendering surface on. Cause: %S (EGL error code: %i). Panicking."),

				&CHuiVg10RenderSurface::EglErrorMessage(eglerr), eglerr);

			HUI_PANIC(THuiPanic::ERenderSurfaceActivationFailed)

			}

		CHuiStatic::SetCurrentRenderSurface(this);               

		}

	}

void CHuiVg10RenderSurface::SwapBuffers()

    {

    eglSwapBuffers(iEglDisplay, iEglSurface);

    }

void CHuiVg10RenderSurface::BindTexture(TInt /*aTextureUnit*/,

                                        const MHuiSegmentedTexture& aTexture,

                                        TInt /*aSegment*/)

    {

    iBoundTexture = &aTexture;

    }

const MHuiSegmentedTexture* CHuiVg10RenderSurface::BoundTexture() const

    {

    return iBoundTexture;

    }

void CHuiVg10RenderSurface::HandleVisibilityEvent(TBool /* aIsVisible */ )

    {

    // Dummy method, does not handle the events in any way...

    }

void CHuiVg10RenderSurface::Release()

    {

    HUI_DEBUG( _L("CHuiVg10RenderSurface::Release() - Releasing EGL surface and context..") );

    if (iEglSurface != NULL)

        {

        eglDestroySurface(iEglDisplay, iEglSurface);

        TInt eglerr = eglGetError();

        if(eglerr != EGL_SUCCESS)

            {

            HUI_DEBUG2(_L("CHuiVg10RenderSurface::Release() - WARNING! Could not destroy EGL surface. Cause: %S (EGL error code: %i)."),

                       &CHuiVg10RenderSurface::EglErrorMessage(eglerr), eglerr);

            }

        iEglSurface = NULL;

        }

    if (iEglContext != NULL)

        {

        // Unshare this context if it was

        // set as shared..

        CHuiVg10RenderPlugin& renderer = CHuiStatic::Vg10Renderer();

        if(renderer.EglSharedContext() == iEglContext)

            {

            HUI_DEBUG(_L("CHuiVg10RenderSurface::Release() - Unsharing this render context."));

            renderer.EglSetSharedContext(EGL_NO_CONTEXT);

            }

        eglDestroyContext(iEglDisplay, iEglContext);

        TInt eglerr = eglGetError();

        if(eglerr != EGL_SUCCESS)

            {

            HUI_DEBUG2(_L("CHuiVg10RenderSurface::Release() - WARNING! Could not destroy EGL context. Cause: %S (EGL error code: %i)."),

                       &CHuiVg10RenderSurface::EglErrorMessage(eglerr), eglerr);

            }

        iEglContext = NULL;

        }

    }

void CHuiVg10RenderSurface::RestoreL()

    {

    HUI_DEBUG( _L("CHuiVg10RenderSurface::RestoreL() - Recreating render surface.") );

    if((iEglSurface != NULL) && (iEglContext != NULL))

        {

        HUI_DEBUG( _L("CHuiVg10RenderSurface::RestoreL() - Render surface and context already in place, no need to restore.") );

        }

    CHuiVg10RenderPlugin& render = CHuiStatic::Vg10Renderer();

    iEglDisplay = render.EglDisplay();

    // Create an EGL rendering surface.

    EGLConfig config = DetermineConfig();

    iEglSurface = CreateSurface(config);

    if(iEglSurface == EGL_NO_SURFACE)

        {

        TInt eglerr = eglGetError();

        switch (eglerr)

            {

            case EGL_BAD_ALLOC:

                HUI_DEBUG2(_L("CHuiVg10RenderSurface::RestoreL() - ERROR! Failed to create rendering surface having size (%ix%i). Out of memory."), 

                           iSize.iWidth, iSize.iHeight);

                User::Leave(KErrNoMemory);

            default:

                HUI_DEBUG4(_L("CHuiVg10RenderSurface::RestoreL() - ERROR! Failed to create rendering surface having size (%ix%i). Cause: %S (EGL error code: %i)."), 

                            iSize.iWidth, iSize.iHeight, 

                            &CHuiVg10RenderSurface::EglErrorMessage(eglerr), eglerr);

                User::Leave(KErrNotSupported);

            }

        }

    // There is only a single texture manager in the environment, so textures

    // need to shared between all contexts.

    iEglContext = eglCreateContext(iEglDisplay, config,

                                   render.EglSharedContext(), NULL);

    if(iEglContext == EGL_NO_CONTEXT)

        {

        TInt eglerr = eglGetError();

        switch (eglerr)

            {

            case EGL_BAD_ALLOC:

                HUI_DEBUG(_L("CHuiVg10RenderSurface::RestoreL() - ERROR! Failed to create rendering context. Out of memory."));

                User::Leave(KErrNoMemory);

            default:

                HUI_DEBUG2(_L("CHuiVg10RenderSurface::RestoreL() - ERROR! Failed to create rendering context. Cause: %S (EGL error code: %i)."),                            

                            &CHuiVg10RenderSurface::EglErrorMessage(eglerr), eglerr);

                User::Leave(KErrNotSupported);

            }

        }

    // Share the created context for texture management.

    if(render.EglSharedContext() == EGL_NO_CONTEXT)

        {

        // Now that there is a context, make sure the renderer knows of it.

        render.EglSetSharedContext(iEglContext);

        }

    }

const TDesC& CHuiVg10RenderSurface::EglErrorMessage(TInt aErrorCode)

    {

    // EGL Error messages.

    _LIT(KEglErrorSUCCESS, "The last function succeeded without error.");

    _LIT(KEglErrorNOT_INITIALIZED, "EGL is not initialized, or could not be initialized, for the specified EGL display connection.");

    _LIT(KEglErrorBAD_ACCESS, "EGL cannot access a requested resource (for example a context is bound in another thread).");

    _LIT(KEglErrorBAD_ALLOC, "EGL failed to allocate resources for the requested operation.");

    _LIT(KEglErrorBAD_ATTRIBUTE, "An unrecognized attribute or attribute value was passed in the attribute list.");

    _LIT(KEglErrorBAD_CONTEXT, "An EGLContext argument does not name a valid EGL rendering context.");

    _LIT(KEglErrorBAD_CONFIG, "An EGLConfig argument does not name a valid EGL frame buffer configuration.");

    _LIT(KEglErrorBAD_CURRENT_SURFACE, "The current surface of the calling thread is a window, pixel buffer or pixmap that is no longer valid.");

    _LIT(KEglErrorBAD_DISPLAY, "An EGLDisplay argument does not name a valid EGL display connection.");

    _LIT(KEglErrorBAD_SURFACE, "An EGLSurface argument does not name a valid surface (window, pixel buffer or pixmap) configured for GL rendering.");

    _LIT(KEglErrorBAD_MATCH, "Arguments are inconsistent (for example, a valid context requires buffers not supplied by a valid surface).");

    _LIT(KEglErrorBAD_PARAMETER, "One or more argument values are invalid.");

    _LIT(KEglErrorBAD_NATIVE_PIXMAP, "A NativePixmapType argument does not refer to a valid native pixmap.");

    _LIT(KEglErrorBAD_NATIVE_WINDOW, "A NativeWindowType argument does not refer to a valid native window.");

    _LIT(KEglErrorUNKNOWN, "Unknown EGL Error.");

    // Define literals for the errors

    switch(aErrorCode)

        {

        case EGL_SUCCESS: return KEglErrorSUCCESS;

        case EGL_NOT_INITIALIZED: return KEglErrorNOT_INITIALIZED;

        case EGL_BAD_ACCESS: return KEglErrorBAD_ACCESS;

        case EGL_BAD_ALLOC: return KEglErrorBAD_ALLOC;

        case EGL_BAD_ATTRIBUTE: return KEglErrorBAD_ATTRIBUTE;

        case EGL_BAD_CONTEXT: return KEglErrorBAD_CONTEXT;

        case EGL_BAD_CONFIG: return KEglErrorBAD_CONFIG;

        case EGL_BAD_CURRENT_SURFACE: return KEglErrorBAD_CURRENT_SURFACE;

        case EGL_BAD_DISPLAY: return KEglErrorBAD_DISPLAY;

        case EGL_BAD_SURFACE: return KEglErrorBAD_SURFACE;

        case EGL_BAD_MATCH: return KEglErrorBAD_MATCH;

        case EGL_BAD_PARAMETER: return KEglErrorBAD_PARAMETER;

        case EGL_BAD_NATIVE_PIXMAP: return KEglErrorBAD_NATIVE_PIXMAP;

        case EGL_BAD_NATIVE_WINDOW: return KEglErrorBAD_NATIVE_WINDOW;

        default: return KEglErrorUNKNOWN;

        }

    }

void CHuiVg10RenderSurface::HandleDisplayUsageChangeL()

    {

    // Nothing to do

    }

void CHuiVg10RenderSurface::SetDirtyRect(const TRect& /*aRect*/)

    {

    // Nothing to do

    }

MHuiTargetBitmap* CHuiVg10RenderSurface::BackBuffer()

    {

    // Nothing to do

    return NULL;

    }

CFbsBitGc* CHuiVg10RenderSurface::Gc()

    {

    // Nothing to do

    return NULL;

    }

void CHuiVg10RenderSurface::RenderSurfaceExtension(const TUid& /*aExtensionUid*/, TAny** aExtensionParams)

    {

    *aExtensionParams = NULL;

    }

HUI_SESSION_OBJECT_IMPL(CHuiVg10RenderSurface, ETypeRenderSurface)