/* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and /or associated documentation files

 * (the "Materials "), to deal in the Materials without restriction,

 * including without limitation the rights to use, copy, modify, merge,

 * publish, distribute, sublicense, and/or sell copies of the Materials,

 * and to permit persons to whom the Materials are furnished to do so,

 * subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included

 * in all copies or substantial portions of the Materials.

 *

 * THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,

 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR

 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE MATERIALS OR

 * THE USE OR OTHER DEALINGS IN THE MATERIALS.

 */

#include "SurfaceDescriptor.h"

#include "BufferContainer.h"

#include "sfEGLInterface.h"

#include "riContext.h"

#include "riPath.h"

#include "riImage.h"

namespace 

    {

    EGLtoVGInterface g_EGLtoVGInterface;

    }

IEGLtoVGInterface* getVGInterface(void)

{    

    return &g_EGLtoVGInterface;

}

EGLtoVGInterface::EGLtoVGInterface() :

    m_egl(NULL)

{

    m_contexts.reserve(4);

}

EGLtoVGInterface::~EGLtoVGInterface()

{

    for(int i = 0; i < m_contexts.size(); i++)

    {

        RI_ASSERT(m_contexts[i]);

        RI_DELETE(m_contexts[i]);

    }

}

void EGLtoVGInterface::SetEGLInterface( IVGtoEGLInterface* egl )

{

    RI_ASSERT(!m_egl);

    m_egl = egl;

}

int EGLtoVGInterface::findContext(OpenVGRI::VGContext* contextPtr)

{

    return m_contexts.findIndex(contextPtr);

}

bool EGLtoVGInterface::isValidImage(void* image)

    {

    bool ret = false;

    for(int i = 0; i < m_contexts.size() && !ret; i++)

        {

        ret = m_contexts[i]->isValidImage((VGImage)image);

        }

    return ret;

    }

void* EGLtoVGInterface::CreateContext( void* shareContext )

{

    if (shareContext)

    {

        if (findContext((OpenVGRI::VGContext*)shareContext) < 0)

            return NULL;

    }

    OpenVGRI::VGContext* newContext = NULL;

    try 

    {

        newContext = RI_NEW(OpenVGRI::VGContext, ((OpenVGRI::VGContext*)shareContext));

        m_contexts.push_back(newContext);

    } 

    catch (std::bad_alloc)

    {

        if (newContext) 

            delete newContext;

        newContext = NULL;

    }

    return newContext;

}

bool EGLtoVGInterface::ReleaseContext( void* context )

{

    int contextIndex = findContext((OpenVGRI::VGContext*)context);

    if (contextIndex < 0)

        return false;

    OpenVGRI::VGContext* ctx = (OpenVGRI::VGContext*)context;

    if( !m_contexts.remove(ctx) )

        return false;

    RI_DELETE(ctx);

    return true;

}

OpenVGRI::Color::Descriptor EGLtoVGInterface::vgDescriptorFromSurfaceDescriptor(const SurfaceDescriptor* sdesc)

{

    const CColorDescriptor& scdesc = sdesc->m_colorDescriptor;

    OpenVGRI::Color::Descriptor vdesc;

    unsigned int formatBits = 0;

    // VG formats are built favoring the first ones in the enum (RGBA, RGBX, etc.)

    // Padded alpha (RGBX, etc.) must be handled. For example:

    // if (vdesc.bitsPerPixel < sdesc.bitsPerPixel)

    //      alphabits = 0, alphashift = 8

    vdesc.bitsPerPixel = scdesc.m_bpp;

    vdesc.bytesPerPixel = vdesc.bitsPerPixel >> 3;

    vdesc.alphaBits = scdesc.m_alphaSize;

    vdesc.alphaShift = sdesc->m_alphaShift;

    vdesc.redBits = scdesc.m_redSize;

    vdesc.redShift = sdesc->m_redShift;

    vdesc.greenBits = scdesc.m_greenSize;

    vdesc.greenShift = sdesc->m_greenShift;

    vdesc.blueBits = scdesc.m_blueSize;

    vdesc.blueShift = sdesc->m_blueShift;

    vdesc.luminanceBits = scdesc.m_luminanceSize;

    vdesc.luminanceShift = sdesc->m_luminanceShift;

    if(scdesc.isLuminance())

        formatBits |= OpenVGRI::Color::LUMINANCE;    

    // \note Could be copied if LUMINANCE == LUMINANCE, etc.

    if (scdesc.isPremultiplied())

        formatBits |= OpenVGRI::Color::PREMULTIPLIED;

    if (scdesc.isNonlinear())

        formatBits |= OpenVGRI::Color::NONLINEAR;

    vdesc.internalFormat = (OpenVGRI::Color::InternalFormat)formatBits;

    // \todo format

    vdesc.vgFormat = (VGImageFormat)-1; // Not necessarily any VG image format

    vdesc.shape = vdesc.getShape();

    return vdesc;

}

bool EGLtoVGInterface::CreateSurface(const SurfaceDescriptor* desc, BufferContainer* buffers, void* image)

{

    RI_ASSERT( buffers );

    OpenVGRI::Color::Descriptor vgColorDescriptor; 

    OpenVGRI::Image* newImage = NULL;

    if(image)

        {

        if(!isValidImage(image))

            return false;

        newImage = (OpenVGRI::Image*)image;

        vgColorDescriptor = newImage->getDescriptor();

        }

    else

        {

        vgColorDescriptor = vgDescriptorFromSurfaceDescriptor(desc);

        }

    OpenVGRI::Drawable* newDrawable = NULL;

    //VGImageQuality quality = VG_IMAGE_QUALITY_BETTER;

    int w = desc->m_width;

    int h = desc->m_height;

    int stride = OpenVGRI::Image::descriptorToStride(vgColorDescriptor, w);

    size_t bufSize = h * stride;

    OpenVGRI::RIuint8* dataPtr = NULL;

    try 

    {

        int maskBits = 0;

        if( !newImage )

            {

            newImage = RI_NEW(OpenVGRI::Image,(vgColorDescriptor, w, h, VG_IMAGE_QUALITY_BETTER));

            maskBits = desc->m_maskSize;

            }

        else

            {

            dataPtr = newImage->getData();

            maskBits = newImage->getDescriptor().maskBits;

            }

        newDrawable = RI_NEW(OpenVGRI::Drawable, (newImage, maskBits));

        newDrawable->addReference();

    } 

    catch (std::bad_alloc)

    {

        if (dataPtr)        RI_DELETE_ARRAY(dataPtr);

        if (newImage)       RI_DELETE(newImage);

        if (newDrawable)    RI_DELETE(newDrawable);

        return false;

    }

    buffers->m_clientSurface = newDrawable;

    buffers->m_colorBuffer = newDrawable->getColorBuffer()->getImage()->getData();

    buffers->m_maskBuffer = newDrawable->getMaskBuffer();

    return true;

}

bool EGLtoVGInterface::ReleaseSurface(void* surface)

{

    RI_ASSERT(surface);

    OpenVGRI::Drawable *drawable = (OpenVGRI::Drawable*)surface;

    if (!drawable->removeReference())

        RI_DELETE(drawable);

	return true;

}

bool EGLtoVGInterface::SetCurrentSurface( void* context, void* surface )

{

    OpenVGRI::Drawable* drawable = (OpenVGRI::Drawable*)surface;

    OpenVGRI::VGContext *ctx = (OpenVGRI::VGContext*)context;

    int i = findContext(ctx);

    if (i < 0)

        return false;

    ctx->setDefaultDrawable(drawable);

    return true;

}

bool EGLtoVGInterface::ResizeSurface( void* context, void* surface, int width, int height, BufferContainer* buffers )

    {

    OpenVGRI::Drawable* drawable = (OpenVGRI::Drawable*)surface;

    OpenVGRI::VGContext *ctx = (OpenVGRI::VGContext*)context;

    int i = findContext(ctx);

    if(i < 0)

        return false;

    try 

    {

        drawable->resize( ctx, width, height );

    } 

    catch (std::bad_alloc) 

    {

        return false;

    }

    buffers->m_clientSurface = drawable;

    buffers->m_colorBuffer = drawable->getColorBuffer()->getImage()->getData();

    buffers->m_maskBuffer = drawable->getMaskBuffer();

    return true;

    }

bool EGLtoVGInterface::IsValidImage( void* image, CColorDescriptor* colorDesc, int* width, int* height )

{

    bool ret = isValidImage(image);

    if(ret)

        {

        *width = ((OpenVGRI::Image*)image)->getWidth();

        *height = ((OpenVGRI::Image*)image)->getHeight();

        const OpenVGRI::Color::Descriptor& desc = ((OpenVGRI::Image*)image)->getDescriptor();

        colorDesc->m_bpp = desc.bitsPerPixel;

        colorDesc->m_redSize = desc.redBits;

        colorDesc->m_greenSize = desc.greenBits;

        colorDesc->m_blueSize = desc.blueBits;

        colorDesc->m_alphaSize = desc.alphaBits;

        colorDesc->m_luminanceSize = desc.luminanceBits;

        colorDesc->m_alphaMaskSize = desc.maskBits;

        colorDesc->m_format = (CColorDescriptor::ColorFormat)desc.internalFormat;

        }

    return ret;

}

bool EGLtoVGInterface::IsImageInUse( void* image )

{

    bool ret = false;

    if(image && isValidImage(image))

        {

        ret = ((OpenVGRI::Image*)image)->isInUse();

        }

    return ret;

}

void* EGLtoVGInterface::CreateImage()

{

    RI_ASSERT(false);

	return NULL;

}

bool EGLtoVGInterface::ReleaseImage()

{

    RI_ASSERT(false);

	return false;

}

void EGLtoVGInterface::Flush()

{

    vgFlush();

}

void EGLtoVGInterface::Finish()

{

    vgFinish();

}

fpVGProc EGLtoVGInterface::GetVGProcAddress( const char *procname )

{

    fpVGProc ret = NULL;

    if(strcmp(procname, "vgePathCoordsSizeInBytes") == 0)

        {

        ret = (fpVGProc)vgePathCoordsSizeInBytes;

        }

    return ret;

}

void EGLtoVGInterface::CopyBuffers( void* buffer, int stride, void* surface )

    {

    OpenVGRI::Drawable *drawable = (OpenVGRI::Drawable*)surface;

    int width = drawable->getColorBuffer()->getWidth();

    int height = drawable->getColorBuffer()->getHeight();

	// \todo Pixel format.

    VGImageFormat format = VG_sARGB_8888_PRE;

    vgReadPixels( buffer, stride, format, 0, 0, width, height );

    }

void EGLtoVGInterface::UpdateBuffers( void* buffer, int stride, const SurfaceDescriptor* desc )

    {

    // \todo format, errors

    VGImageFormat format = VG_sARGB_8888_PRE;

    vgWritePixels( buffer, stride, format, 0, 0, desc->m_width, desc->m_height );

    }

bool EGLtoVGInterface::IsRootImage( void* image )

    {

    if( !image ) return false;    

    if ( vgGetParent( (VGImage)image ) )

        {

        // if vgGetParent returns not NULL image it is not parent image

        // , only child image has parent image, and this should return false

        return false;

        }

    // vgGetParent is NULL and image is parent image

    return true;

    }                                                    

void EGLtoVGInterface::GetImageData( void* image, SurfaceDescriptor& desc, void* data )

    {

    OpenVGRI::Image* vgimage = (OpenVGRI::Image*)image;

    if( !image )

        {

        return;

        }

    desc.m_height = vgimage->getHeight();

    desc.m_width  = vgimage->getWidth();

    int bufSize;

    OpenVGRI::Color::Descriptor colorDesc   = vgimage->getDescriptor();

	VGImageFormat vgFormat;

	// Convert some formats into more GL-friendly formats.

	if( colorDesc.vgFormat == VG_BW_1 )

		{

		vgFormat = VG_lL_8;

		}

	else if( colorDesc.vgFormat == VG_A_1 || colorDesc.vgFormat == VG_A_4 )

		{

		vgFormat = VG_A_8;

		}

	else

		{

		vgFormat = colorDesc.vgFormat;

		}

    desc.m_colorDescriptor.m_format = (CColorDescriptor::ColorFormat)colorDesc.internalFormat;

    desc.m_alphaShift     = colorDesc.alphaShift;

    desc.m_blueShift      = colorDesc.blueShift;

    desc.m_greenShift     = colorDesc.greenShift;

    desc.m_redShift       = colorDesc.redShift;

    desc.m_luminanceShift = colorDesc.luminanceShift;

    desc.m_stride         = vgimage->getStride();

    bufSize = (desc.m_stride * desc.m_height);

    // Allocate data from memory.

    data = RI_NEW_ARRAY(OpenVGRI::RIuint8, bufSize);

    // Get data from VG

    vgGetImageSubData( (VGImage)vgimage, data, vgimage->getStride(), vgFormat, 0, 0, vgimage->getWidth(), vgimage->getWidth() );

    }

void EGLtoVGInterface::AddRef( void* image )

    {

    OpenVGRI::Image* vgimage = (OpenVGRI::Image*)image;

    if( !image )

        {

        return;

        }

    vgimage->addReference();

    }

void EGLtoVGInterface::RemoveRef( void* image )

    {

    OpenVGRI::Image* vgimage = (OpenVGRI::Image*)image;

    if( !image )

        {

        return;

        }

    vgimage->removeReference();

    }

/*static*/ IVGtoEGLInterface* EGLtoVGInterface::GetEGLInterface()

{

    return g_EGLtoVGInterface.m_egl;

}

void* OpenVGRI::eglvgGetCurrentVGContext(void)

{

    return EGLtoVGInterface::GetEGLInterface()->GetVGContext();

}

bool OpenVGRI::eglvgIsInUse(void* image)

{

    return EGLtoVGInterface::GetEGLInterface()->IsImageInUse(image);

}

bool OpenVGRI::eglvgLockSurface(bool read, bool write)

{

	return EGLtoVGInterface::GetEGLInterface()->LockVGSurface(read, write);

}

bool OpenVGRI::eglvgUnlockSurface()

{

	return EGLtoVGInterface::GetEGLInterface()->UnlockVGSurface();

}

void OpenVGRI::OSAcquireMutex(void)

{

}

void OpenVGRI::OSReleaseMutex(void) 

{

}

void OpenVGRI::eglvgGetImageDescriptor( void* image, Color::Descriptor &desc, int &width, int &height, int &stride )

    {

    SurfaceDescriptor surfDesc;

    EGLtoVGInterface::GetEGLInterface()->GetDescForImage( image, surfDesc );

    desc = EGLtoVGInterface::vgDescriptorFromSurfaceDescriptor( &surfDesc );

    width = surfDesc.m_width;

    height = surfDesc.m_height;

    stride = surfDesc.m_stride;

    }

void* OpenVGRI::eglvgGetImageData( void* image )

    {

    return EGLtoVGInterface::GetEGLInterface()->GetDataForImage( image );

    }