/*

* 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:   Implementation of CHuiVg10RenderPlugin. Rendering plugin for OpenVG 1.0.

*

*/

#include "HuiVg10RenderPlugin.h"

#include "HuiVg10RenderSurface.h"

#include "HuiVg10PBufferSurface.h"

#include "HuiVg10Gc.h"

#include "HuiVg10Texture.h"

#include "HuiVg10TextureManager.h"

#include "HuiVg10CurvePath.h"

#include "huivg10canvasgc.h"

#include "HuiRasterizedTextMesh.h"

#include "uiacceltk/HuiStatic.h"

#include "uiacceltk/HuiPanic.h"

#include "uiacceltk/HuiUtil.h"

#include "uiacceltk/HuiEnv.h"

#include "uiacceltk/HuiDisplay.h"

#include "HuiFxVg10Engine.h"

#ifdef __NVG

    #include <nvg.h>

    #include "HuiVg10VgImageBinder.h"

#endif

#include <AknUtils.h>

#include <implementationproxy.h>

#if !defined(EGL_VERSION_1_2)

#  error At least EGL version 1.2 is required by the OpenVG render plugin.

#endif

const TImplementationProxy ImplementationTable[] = 

	{

	IMPLEMENTATION_PROXY_ENTRY( 0x200184B8, CHuiVg10RenderPlugin::NewL )

	};

EXPORT_C const TImplementationProxy* ImplementationGroupProxy( TInt& aTableCount )

	{

	aTableCount = sizeof( ImplementationTable ) / sizeof( TImplementationProxy );

	return ImplementationTable;

	}

CHuiVg10RenderPlugin* CHuiVg10RenderPlugin::NewL()

    {

    CHuiVg10RenderPlugin* self = CHuiVg10RenderPlugin::NewLC();

    CleanupStack::Pop(self);

    return self;

    }

CHuiVg10RenderPlugin* CHuiVg10RenderPlugin::NewLC()

    {

    CHuiVg10RenderPlugin* self = new (ELeave) CHuiVg10RenderPlugin();

    CleanupStack::PushL(self);

    self->ConstructL();

    return self;

    }

CHuiVg10RenderPlugin::CHuiVg10RenderPlugin(THuiRenderPluginId aId)

        : CHuiRenderPlugin(aId)

    {

    }

void CHuiVg10RenderPlugin::ConstructL()

    {

    HUI_DEBUG(_L("CHuiVg10RenderPlugin::ConstructL() - Initializing Rendering plugin.") );

	iIsHardwareAccelerated = EFalse;

	iEGLStateForTextureUpload.iContext = KErrNotFound; // this will be defined later by the first upload in CHuiVg10Texture::PushEGLContext

    iEglDisplay = NULL; 

    iDefaultRenderSurface = NULL;

    // Restore (Create the EGL surfaces)

    RestoreL();

// The disable flag is defined in coretkoptions.mmh

#ifndef VG10_DISABLE_DEFAULT_RENDER_SURFACE

    HUI_DEBUG(_L("CHuiVg10RenderPlugin::ConstructL() - Create default PBuffer rendering surface for texture preloads.") );

    // Create default PBuffer rendering surface. This will allow us to for instance preload

    // and create textures before actual rendering surface exists.

    iDefaultRenderSurface = CHuiVg10PBufferSurface::NewLC(*this, TSize(64, 64));

    CleanupStack::Pop(iDefaultRenderSurface);

    iDefaultRenderSurface->MakeCurrent();

    iIsHardwareAccelerated = IsHardwareAccelerated();

#endif

    HUI_DEBUG(_L("CHuiVg10RenderPlugin::ConstructL() - Rendering plugin for OpenVG 1.0 ready.") );      

    // Initialize some "allow flags" which depend on used HW

    ReadAllowsSwapBufferPreserved();

    ReadAllowsVisualPBufferSurfaces();    

    }

CHuiVg10RenderPlugin::~CHuiVg10RenderPlugin()

    {

    Release();

#ifndef VG10_DISABLE_DEFAULT_RENDER_SURFACE

    if (iDefaultRenderSurface)

        {

        HUI_DEBUG(_L("CHuiVg10RenderPlugin::~CHuiVg10RenderPlugin() - Destroying default rendering surface."));

        // Destroy default rendering surface

        delete iDefaultRenderSurface; iDefaultRenderSurface = NULL;

        }

#endif

    }

void CHuiVg10RenderPlugin::RestoreL()

    {

    HUI_DEBUG(_L("CHuiVg10RenderPlugin::RestoreL() - Restoring renderer..") );

    // Get the display for drawing graphics.

    if (CHuiStatic::Env().GlesRefCounter() == 0)

        {

        HUI_DEBUG(_L("CHuiVg10RenderPlugin::RestoreL() - Getting default EGL Display.") );

        iEglDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY);

        if(iEglDisplay == EGL_NO_DISPLAY)

            {

            HUI_DEBUG(_L("CHuiVg10RenderPlugin::RestoreL() - ERROR! No connection to EGL display was available."));

            TInt eglerr = eglGetError();

            switch (eglerr)

                {

                case EGL_BAD_ALLOC:

                    HUI_DEBUG(_L("CHuiVg10RenderPlugin::RestoreL() - Cause: Out of memory. Leaving."));

                    User::Leave(KErrNoMemory);

                default:

                    HUI_DEBUG2(_L("CHuiVg10RenderPlugin::RestoreL() - EGL information for the error: %S (EGL error code: %i). Leaving."), &CHuiVg10RenderSurface::EglErrorMessage(eglerr), eglerr);

                case EGL_SUCCESS:

                    User::Leave(KErrNotSupported);

                }

            }

        EGLint majorVersion=0;

        EGLint minorVersion=0;

        // Initialize display.

        if(eglInitialize(iEglDisplay, &majorVersion, &minorVersion) == EGL_FALSE)

            {

            TInt eglerr = eglGetError();

            switch (eglerr)

                {

                case EGL_BAD_ALLOC:

                    HUI_DEBUG(_L("CHuiVg10RenderPlugin::RestoreL() - Cause: Out of memory. Leaving."));

                    User::Leave(KErrNoMemory);

                default:

                    HUI_DEBUG2(_L("CHuiVg10RenderPlugin::RestoreL() - ERROR! Failed to initialize EGL display. Cause: %S (EGL error code: %i). Leaving."), &CHuiVg10RenderSurface::EglErrorMessage(eglerr), eglerr);

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

                case EGL_NOT_INITIALIZED:

                    User::Leave(KErrNotSupported);

                }

            }

        HUI_DEBUG2(_L("CHuiVg10RenderPlugin::RestoreL() - EGL Initialized. EGL Version %i.%i"), majorVersion, minorVersion); 

        CHuiStatic::Env().GlesRefCounter()++;

        // Indicate that we are going to use OpenVG for our drawing

        eglBindAPI(EGL_OPENVG_API);

        }

#ifndef VG10_DISABLE_DEFAULT_RENDER_SURFACE

    if (iDefaultRenderSurface != NULL)

        {

        HUI_DEBUG(_L("CHuiVg10RenderPlugin::RestoreL() - Restoring default rendering surface..") );

        iDefaultRenderSurface->RestoreL();

        iDefaultRenderSurface->MakeCurrent();

        }

#endif

    iStateFlags = 0;

#ifdef __NVG

    iNvgEngine = CNvgEngine::NewL();

    // Set the image binder for NVG-TLV special case "Group opacity"

    iMVGImageBinder = CHuiVg10VgImageBinder::NewL(this);

    iNvgEngine->SetVGImageBinder(iMVGImageBinder);

#endif

    HUI_DEBUG(_L("CHuiVg10RenderPlugin::RestoreL() - Renderer restored!") );

    }

void CHuiVg10RenderPlugin::Release()

    {

#ifndef VG10_DISABLE_DEFAULT_RENDER_SURFACE

    if (iDefaultRenderSurface != NULL)

        {

        HUI_DEBUG(_L("CHuiVg10RenderPlugin::Release() - Releasing default rendering surface..") );

        iDefaultRenderSurface->Release();

        }

#endif

    // Uninitialize EGL.

    if (--CHuiStatic::Env().GlesRefCounter() == 0)

        {

        HUI_DEBUG(_L("CHuiVg10RenderPlugin::Release() - Uninitializing EGL."));

        eglMakeCurrent(iEglDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);

    	eglTerminate(iEglDisplay);

    	eglReleaseThread();

        iEglDisplay = 0;

        }

#ifdef __NVG

    delete iNvgEngine;

    iNvgEngine = NULL;

    delete iMVGImageBinder;

    iMVGImageBinder = NULL;

#endif

    HUI_DEBUG(_L("CHuiVg10RenderPlugin::Release() - Renderer released."));

    }

TBool CHuiVg10RenderPlugin::Allows(THuiRenderPluginAllow aAllow) const

    {

    switch(aAllow)

        {

        case EHuiRenderPluginAllowTextureModeInterpolate:

            // OpenVG does not support texture interpolation.

            return EFalse;

#ifdef VG10_DISABLE_DEFAULT_RENDER_SURFACE

        case EHuiRenderPluginAllowPBufferSurfaces:

            return EFalse;            

#endif            

        case EHuiRenderPluginAllowSwapBufferPreserve:

            return iAllowsSwapBufferPreserved;

        case EHuiRenderPluginAllowVisualPBufferSurfaces:

            return iAllowsVisualPBufferSurfaces;           

        default:

            return ETrue;

        }

    }

MHuiRenderSurface* CHuiVg10RenderPlugin::CreateRenderSurfaceL(CHuiDisplay& aDisplay)

    {

    return CHuiVg10RenderSurface::NewL(aDisplay);

    }

CHuiVg10PBufferSurface* CHuiVg10RenderPlugin::CreatePBufferSurfaceL(TSize aSize, TInt aEglBufferType, TInt aBufferColorMode)

    {

    CHuiVg10PBufferSurface* surface = CHuiVg10PBufferSurface::NewLC(*this, aSize, 0, aEglBufferType, aBufferColorMode);

    CleanupStack::Pop(surface);

    return surface;

    }

CHuiGc* CHuiVg10RenderPlugin::CreateGcL()

    {

    return CHuiVg10Gc::NewL();

    }

CHuiTexture* CHuiVg10RenderPlugin::CreateTextureL(const THuiTextureHandle* aExistingTexture)

    {

    return CHuiVg10Texture::NewL(*this, aExistingTexture);

    }

CHuiTextureManager* CHuiVg10RenderPlugin::CreateTextureManagerL(CHuiEnv& aEnv)

    {

    return CHuiVg10TextureManager::NewL(aEnv);

    }

CHuiMesh* CHuiVg10RenderPlugin::CreateMeshL(THuiMeshType aMeshType)

    {

    CHuiMesh* ret = NULL;

    switch(aMeshType)

    	{

    	default:

    		User::Leave(KErrNotSupported);

    		break;

    	}

	return ret;    	

    }

CHuiTextMesh* CHuiVg10RenderPlugin::CreateTextMeshL()

    {

    return CHuiRasterizedTextMesh::NewL();

    }

CHuiCurvePath* CHuiVg10RenderPlugin::CreateCurvePathL()

    {

    CHuiVg10CurvePath* curve = new (ELeave) CHuiVg10CurvePath();

    CleanupStack::PushL(curve);

    curve->ConstructL();

    CleanupStack::Pop(curve);

    return curve;

    }

void CHuiVg10RenderPlugin::DeleteNamedTexture(TUint aName)

    {

    (void)aName;

    }

#ifndef VG10_DISABLE_DEFAULT_RENDER_SURFACE

void CHuiVg10RenderPlugin::NotifyDisplayCountL(TUint aCount)

    {

    if( aCount == 0 )

        {

        // No current display available in the environment.

        // Make default surface current to be able to continue resource loading.

        iDefaultRenderSurface->MakeCurrent();

        }

    }

#else

void CHuiVg10RenderPlugin::NotifyDisplayCountL(TUint /*aCount*/)

    {

    }

#endif

EGLConfig CHuiVg10RenderPlugin::EglDisplay()

    {

    return iEglDisplay;

    }

EGLContext CHuiVg10RenderPlugin::EglSharedContext() const

    {

    return iSharedContext;

    }

void CHuiVg10RenderPlugin::EglSetSharedContext(EGLContext aContext)

    {

    iSharedContext = aContext;

    }

TInt CHuiVg10RenderPlugin::EglChooseConfig(const TInt* aAttribList)

    {

    EGLint numOfConfigs = 0;

    if(eglChooseConfig(iEglDisplay, aAttribList, iConfigs, KVg10ConfigsCount,

                       &numOfConfigs) == EGL_FALSE)

        {

        return 0;

        }

    return numOfConfigs;

    }

TInt CHuiVg10RenderPlugin::EglConfig(TInt aIndex)

    {

    if(aIndex < 0 || aIndex >= KVg10ConfigsCount)

        {

        THuiPanic::Panic(THuiPanic::EEnvConfigNotFound);

        }

    return iConfigs[aIndex];

    }

void CHuiVg10RenderPlugin::EglPrintConfig(TInt aIndex)

    {

    if(aIndex < 0 || aIndex >= KVg10ConfigsCount)

        {

        THuiPanic::Panic(THuiPanic::EEnvConfigNotFound);

        }

    EGLint value;

    EGLConfig cfg = iConfigs[aIndex];

    CHuiStatic::Printf(_L("EGL Configuration %i:"), aIndex);

#ifdef WIN32

#define HUI_PRINT_EGL_ATTRIB(aAttr) \

    eglGetConfigAttrib(iEglDisplay, cfg, aAttr, &value); \

    CHuiStatic::Printf(_L(#aAttr " = %i (%04x)"), value, value);

#else

#define HUI_PRINT_EGL_ATTRIB(aAttr) \

    eglGetConfigAttrib(iEglDisplay, cfg, aAttr, &value); \

    CHuiStatic::Printf(_L("Parameter (id %04x):"), aAttr); \

    CHuiStatic::Printf(_L8(#aAttr)); \

    CHuiStatic::Printf(_L("Value: %i (%04x)"), value, value);

#endif

    HUI_PRINT_EGL_ATTRIB(EGL_CONFIG_ID);

    HUI_PRINT_EGL_ATTRIB(EGL_CONFIG_CAVEAT);

    HUI_PRINT_EGL_ATTRIB(EGL_SURFACE_TYPE);

    HUI_PRINT_EGL_ATTRIB(EGL_BUFFER_SIZE);

    HUI_PRINT_EGL_ATTRIB(EGL_RED_SIZE);

    HUI_PRINT_EGL_ATTRIB(EGL_GREEN_SIZE);

    HUI_PRINT_EGL_ATTRIB(EGL_BLUE_SIZE);

    HUI_PRINT_EGL_ATTRIB(EGL_ALPHA_SIZE);

    HUI_PRINT_EGL_ATTRIB(EGL_DEPTH_SIZE);

    HUI_PRINT_EGL_ATTRIB(EGL_LEVEL);

    HUI_PRINT_EGL_ATTRIB(EGL_MAX_PBUFFER_WIDTH);

    HUI_PRINT_EGL_ATTRIB(EGL_MAX_PBUFFER_HEIGHT);

    HUI_PRINT_EGL_ATTRIB(EGL_MAX_PBUFFER_PIXELS);

    HUI_PRINT_EGL_ATTRIB(EGL_NATIVE_RENDERABLE);

    HUI_PRINT_EGL_ATTRIB(EGL_NATIVE_VISUAL_ID);

    HUI_PRINT_EGL_ATTRIB(EGL_NATIVE_VISUAL_TYPE);

    HUI_PRINT_EGL_ATTRIB(EGL_SAMPLE_BUFFERS);

    HUI_PRINT_EGL_ATTRIB(EGL_SAMPLES);

    HUI_PRINT_EGL_ATTRIB(EGL_STENCIL_SIZE);

    HUI_PRINT_EGL_ATTRIB(EGL_TRANSPARENT_TYPE);

#ifdef EGL_VERSION_1_1

    HUI_PRINT_EGL_ATTRIB(EGL_BIND_TO_TEXTURE_RGB);

    HUI_PRINT_EGL_ATTRIB(EGL_BIND_TO_TEXTURE_RGBA);

    HUI_PRINT_EGL_ATTRIB(EGL_MAX_SWAP_INTERVAL);

    HUI_PRINT_EGL_ATTRIB(EGL_MIN_SWAP_INTERVAL);

#endif

#ifdef EGL_VERSION_1_2

    HUI_PRINT_EGL_ATTRIB(EGL_PRESERVED_RESOURCES);

    HUI_PRINT_EGL_ATTRIB(EGL_LUMINANCE_SIZE);

    HUI_PRINT_EGL_ATTRIB(EGL_ALPHA_MASK_SIZE);

    HUI_PRINT_EGL_ATTRIB(EGL_COLOR_BUFFER_TYPE);

    HUI_PRINT_EGL_ATTRIB(EGL_RENDERABLE_TYPE);

#endif

#undef HUI_PRINT_EGL_ATTRIB

    }

TBool CHuiVg10RenderPlugin::IsReleased() const

    {

    if(CHuiStatic::Env().GlesRefCounter() == 0)

        {

        return ETrue;

        }

    return EFalse;

    }

const TDesC& CHuiVg10RenderPlugin::VgErrorMessage(VGErrorCode aErrorCode)

    {

    // Error messages.

    _LIT(KGlesErrorUnknown, "Invalid or unknown error.");

    switch(aErrorCode)

        {

        default:

            return KGlesErrorUnknown;

        }

    }

VGErrorCode CHuiVg10RenderPlugin::VgError()

    {

    VGErrorCode error = vgGetError();

#ifdef _DEBUG

    // Print the vgError always in debug mode, not just when HUI_DEBUG is in use 

    if (error != VG_NO_ERROR)

        {

        RDebug::Print(_L("CHuiVg10RenderPlugin::VgError -- %04x"), error);

        }

#endif

    return error;

    }

TBool CHuiVg10RenderPlugin::IsHardwareAccelerated()

	{

	// consider vg10 plugin as HW accelerated until a better check

//	TBool HWFound = EFalse;

	iIsHardwareAccelerated = ETrue;

	return ETrue;		

	}

CHuiCanvasGc* CHuiVg10RenderPlugin::CreateCanvasGcL()

    {

    return new (ELeave) CHuiVg10CanvasGc();        

    }

CHuiFxEngine* CHuiVg10RenderPlugin::CreateEffectsEngineL()

    {

    return CHuiFxVg10Engine::NewL(*this);

    }

void CHuiVg10RenderPlugin::AddRestoreStateFlags(TInt aFlags)

    {

    iStateFlags |= aFlags;

    }

TInt CHuiVg10RenderPlugin::GetRestoreStateFlags()

    {

    return iStateFlags;

    }

void CHuiVg10RenderPlugin::ClearRestoreStateFlags()

    {

    iStateFlags &= 0x00000000;

    }

#ifdef __NVG

CNvgEngine& CHuiVg10RenderPlugin::NvgEngine() const

    {

    return *iNvgEngine;

    }

#endif

// TODO: This is only a temporary check until all HW platforms support feature

void CHuiVg10RenderPlugin::ReadAllowsSwapBufferPreserved()

    {    

#ifdef __WINS__ 

    iAllowsSwapBufferPreserved = ETrue;

#else

    const char* vendor = eglQueryString(iEglDisplay, EGL_VENDOR);    

    //const VGubyte* vendor = vgGetString(VG_VENDOR);    

    //RDebug::Print(_L("vendor = %s"), vendor);    

    TBool found = EFalse;

    if( vendor[0] != 0 && vendor[0] == 'B' && vendor[1] == 'r')

        {

        RDebug::Print(_L("CHuiVg10RenderPlugin::ReadAllowsSwapBufferPreserved() -- ETrue"));    

        found = ETrue;

        }

    else

        {