/* 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.

 *

 * Initial Contributors:

 * Nokia Corporation - initial contribution.

 *

 * Contributors:

 *

 * Description:

 *

 */

#include "EGLState.h"

#include "EGLDisplay.h"

#include "EGLProcess.h"

#include "EGLThread.h"

#include "EGLContext.h"

#include "EGLConfig.h"

#include "EGLOs.h"

#include "EGLImage.h"

#include "EGLPbufferSurface.h"

#include "EGLWindowSurface.h"

#include <EGL/eglext.h>

#include <string.h>

CEGLState::CEGLState(void) :

    m_initialized( false ),

    m_currentProcess( NULL ),

    m_VGLib( NULL ),

    m_VGInterface( NULL ),

    m_GLES1Lib( NULL ),

    m_GLES1Interface( NULL ),

    m_GLES2Lib( NULL ),

    m_GLES2Interface( NULL ),

	m_hostGL( NULL ),

    m_supportedApis( 0 ),

	m_defaultDisplay( NULL ),

	m_dummyWindow( NULL )

    {

#if !defined(EGLI_USE_PLATSIM_EXTENSIONS)

    CEGLProcess* p = EGLI_NEW CEGLProcess(0);

    EGLI_ASSERT( p != NULL );

    AddObject<CEGLProcess>( m_processes, p );

    m_currentProcess = p;

#endif

    }

CEGLState::~CEGLState(void)

    {

    DestroyPointerVector<CEGLProcess>( m_processes );

    DestroyPointerVector<CEGLDisplay>( m_displays );

    DestroyPointerVector<CEGLConfig>( m_configs );

    if( m_VGLib ) EGLI_ASSERT( CEGLOs::FreeClientLibrary(m_VGLib) );

    if( m_GLES1Lib ) EGLI_ASSERT( CEGLOs::FreeClientLibrary(m_GLES1Lib) );

    if( m_GLES2Lib ) EGLI_ASSERT( CEGLOs::FreeClientLibrary(m_GLES2Lib) );

#if defined(_WIN32)

#   if !defined(EGLI_USE_PLATSIM_EXTENSIONS)

    if( m_defaultDisplay )

        {

        // \todo If at some point EGL_DEFAULT_DISPLAY is created

        //       with CreateDC() the DC needs to be released by

        //       calling DeleteDC().

        //CEGLOs::DestroyDefaultDisplay( m_defaultDisplay );

        ReleaseDC( m_dummyWindow, m_defaultDisplay );

        }

    // \note Dummy window created in CEGLDisplay::Initialize(). See comment

    //       in CEGLOs::CreateDefaultDisplay().

    if( m_dummyWindow )

        {

        CEGLOs::DestroyNativeWindow( m_dummyWindow );

        }

#   endif

#endif

    }

bool CEGLState::Initialize()

    {

    if( !m_initialized )

        {

        if( !(CreateConfigs()) ) return false;

        m_initialized = true;

        m_VGInterface = CEGLOs::LoadVGInterface( m_VGLib );

        if( m_VGInterface ) 

            {

            m_VGInterface->SetEGLInterface( this );

            m_supportedApis |= EGL_OPENVG_BIT;

            }

        m_GLES1Interface = CEGLOs::LoadGLES1Interface( m_GLES1Lib );

        if( m_GLES1Interface ) 

            {

            m_GLES1Interface->SetEGLInterface( this );

            m_supportedApis |= EGL_OPENGL_ES_BIT;

            }

	    m_GLES2Interface = CEGLOs::LoadGLES2Interface( m_GLES2Lib );

        if( m_GLES2Interface ) 

            {

            m_GLES2Interface->SetEGLInterface( this );

            m_supportedApis |= EGL_OPENGL_ES2_BIT;

            }

        if( m_supportedApis & EGL_OPENGL_ES_BIT || (m_supportedApis & EGL_OPENGL_ES2_BIT) )

            {

            m_hostGL = CEGLOs::LoadHostGL();

            if( !m_hostGL ) m_initialized = false;

            }

        if( !m_supportedApis )

            {

            m_initialized = false;

            }

		//m_defaultDisplay = CEGLOs::CreateDefaultDisplay();

        // \note Creating a dummy window to get DC from. See comment

        //       in CEGLOs::CreateDefaultDisplay().

		m_dummyWindow = CEGLOs::CreateNativeWindow(0, 0);

        if( m_dummyWindow )

			{

#if defined(_WIN32)

			m_defaultDisplay = (EGLINativeDisplayType)GetDC( (HWND)m_dummyWindow );

#else // Linux

			EGLI_ASSERT( false );

#endif

			if( !m_defaultDisplay )

				{

				CEGLOs::DestroyNativeWindow( m_dummyWindow );

				m_initialized = false;

				}

			}

        }

    return m_initialized;

    }

CEGLDisplay* CEGLState::AddDisplay( EGLINativeDisplayType nativeType, EGLint processId )

    {

#if defined(EGLI_USE_PLATSIM_EXTENSIONS)

    CEGLDisplay* display = EGLI_NEW CEGLDisplay( nativeType, processId );

#else

    CEGLDisplay* display = EGLI_NEW CEGLDisplay( nativeType, m_currentProcess->Id() );

#endif

    if( display )

        {

        AddObject<CEGLDisplay>( m_displays, display );

        }

    return display;

    }

void CEGLState::RemoveDisplay( EGLDisplay display )

    {

    DeleteObjectByPointer<CEGLDisplay>( m_displays, display );

    }

CEGLDisplay* CEGLState::GetDisplayByNativeType( EGLINativeDisplayType nativeType, EGLint processId ) const

    {

    CEGLDisplay* ret = NULL;

    for( std::vector<CEGLDisplay*>::const_iterator iter = m_displays.begin();

        iter != m_displays.end();

        iter++)

        {

#if defined(EGLI_USE_PLATSIM_EXTENSIONS)

        if( (*iter)->NativeType() == nativeType && (*iter)->ProcessId() == processId )

#else

        if( (*iter)->NativeType() == nativeType )

#endif

            {

            ret = (*iter);

            break;

            }

        }

    return ret;

    }

CEGLDisplay* CEGLState::GetDisplay( EGLDisplay display ) const

    {

    return FindObjectByPointer<CEGLDisplay>( m_displays, display, NULL);

    }

CEGLProcess* CEGLState::AddProcess( EGLint processId, bool setCurrent )

    {

#if defined(EGLI_USE_PLATSIM_EXTENSIONS)

    CEGLProcess* process = EGLI_NEW CEGLProcess( processId );

    if( process )

        {

        AddObject<CEGLProcess>( m_processes, process );

        if( setCurrent && process )

            {

            m_currentProcess = process;

            }

        }

    return process;

#else

    EGLI_ASSERT( false );

    return NULL;

#endif

    }

void CEGLState::RemoveProcess( EGLint processId )

    {

#if defined(EGLI_USE_PLATSIM_EXTENSIONS)

    if( m_currentProcess && m_currentProcess->Id() == processId )

        {

        m_currentProcess = NULL;

        }

    DeleteObjectById<CEGLProcess>( m_processes, processId );

#else

    EGLI_ASSERT( false );

#endif

    }

CEGLProcess* CEGLState::GetProcess( EGLint processId ) const

    {

#if defined(EGLI_USE_PLATSIM_EXTENSIONS)

    return FindObjectById<CEGLProcess>( m_processes, processId, NULL );

#else

    return m_currentProcess;

#endif

    }

void CEGLState::SetCurrentProcessThread( EGLint processId, EGLI_THREAD_ID threadId )

    {

#if defined(EGLI_USE_PLATSIM_EXTENSIONS)

    if( m_currentProcess && m_currentProcess->Id() == processId )

        {

        m_currentProcess->SetCurrentThread( threadId );

        }

    else

        {

        CEGLProcess* process = FindObjectById<CEGLProcess>( m_processes, processId, NULL);

        // processes are created in eglPlatsimSetProcessInformation()

        EGLI_ASSERT( process != NULL );

        process->SetCurrentThread( threadId );

        m_currentProcess = process;

        }

#else

    EGLI_ASSERT( false );

#endif

    }

void CEGLState::FillConfigs( EGLConfig* configs, EGLint size ) const

    {

    EGLI_ASSERT( size <= ConfigCount() );

    for( EGLint i=0; i < size; i++ )

        {

        configs[i] = (EGLConfig)m_configs[i];

        }

    }

CEGLConfig* CEGLState::FindConfigById( EGLint id ) const

    {

    return FindObjectById<CEGLConfig>( m_configs, id, NULL );

    }

EGLint CEGLState::MatchConfigs( CEGLConfig* filter, EGLConfig* configs, EGLint maxCount ) const

    {

    maxCount = EGLI_MIN( m_configs.size(), (unsigned int)maxCount );

    EGLint count = 0;

    std::vector<CEGLConfig*>::const_iterator iter = m_configs.begin();

    while( iter != m_configs.end() )

        {

        if( (*iter)->Match( *filter ) )

            {

            if( configs && count < maxCount )

                configs[count++] = (EGLConfig)(*iter);

            else if( configs )

                break;

            else

                count++;

            }

        iter++;

        }

    if( configs && count > 1 )

        {

        for( int i=0; i < count-1; i++ )

            for( int j=i+1; j < count; j++ )

                {

                if( *((CEGLConfig*)configs[j]) > *((CEGLConfig*)configs[i]) )

                    {

                    EGLConfig tmp = configs[i];

                    configs[i] = configs[j];

                    configs[j] = tmp;

                    }

                }

        }

    return count;

    }

CEGLConfig* CEGLState::GetConfig( EGLConfig config ) const

    {

    return FindObjectByPointer<CEGLConfig>( m_configs, config, NULL );

    }

void* CEGLState::GetVGContext()

    {

    CEGLOs::GetLock( &g_eglLock );

    void* ret = NULL;

    if( m_currentProcess &&

        m_currentProcess->CurrentThread() &&

        m_currentProcess->CurrentThread()->CurrentVGContext() )

        {

        ret = m_currentProcess->CurrentThread()->CurrentVGContext()->ClientContext();

        }

    CEGLOs::ReleaseLock( &g_eglLock );

    return ret;

    }

void* CEGLState::GetHostProcAddress(const char* proc)

	{

    return CEGLOs::GetGLProcAddress(m_hostGL, proc);

	}

void* CEGLState::GetGLESContext()

    {

    CEGLOs::GetLock( &g_eglLock );

    void* ret = NULL;

    if( m_currentProcess &&

        m_currentProcess->CurrentThread() &&

        m_currentProcess->CurrentThread()->CurrentGLESContext() )

        {

        ret = m_currentProcess->CurrentThread()->CurrentGLESContext()->ClientContext();

        }

    CEGLOs::ReleaseLock( &g_eglLock );

    return ret;

    }

bool CEGLState::IsImageInUse( void* image )

    {

    //TODO

    return false;

    }

bool CEGLState::LockVGSurface( bool read, bool write )

    {

    return LockSurface( EGL_OPENVG_API, read, write );

    }

bool CEGLState::UnlockVGSurface()

    {

    return UnlockSurface( EGL_OPENVG_API );

    }

void CEGLState::GetDescForImage( void* image, SurfaceDescriptor& ImageDesc )

    {

    CEGLImage* eglImage = (CEGLImage*)image;

    ImageDesc.m_stride = -1;

    ImageDesc.m_height = -1;

    ImageDesc.m_width  = -1;

    // Check that image is not null.

    if( !eglImage )

        {        

        return;

        }

    // Check that image is not from VGImage target. -> EGL_VG_PARENT_IMAGE_KHR

    if( eglImage->Target() == EGL_VG_PARENT_IMAGE_KHR )

        {

        return;

        }

	memcpy(&ImageDesc, &eglImage->SurfaceDesc(), sizeof(ImageDesc));

    }

void* CEGLState::GetDataForImage( void* image )

    {

    CEGLImage* eglImage = (CEGLImage*)image;

    // Check that image is not null.

    if( !eglImage )

        {

        // if null then error

        return NULL;

        }

	return eglImage->Data();

    }

void CEGLState::RegisterImageTarget( void* image, EImageTarget target, void* buffer )

	{

	// \todo Implement

	}

void CEGLState::UnregisterImageTarget( void* image, EImageTarget target, void* buffer )

	{

	// \todo Implement

	}

void CEGLState::UpdateImageSiblings( void* image, EImageTarget target, void* buffer )

	{

	// \todo Implement

	}

void CEGLState::ReleaseTexImage(void* surface, int name, int level)

{

	CEGLSurface* eglSurface = (CEGLSurface*)surface;

	EGLITextureBinding& binding = eglSurface->TextureBinding();

	if(binding.name == name && binding.level == level)

	{

		eglSurface->Unlock();

		binding.name = 0;

	}

}

bool CEGLState::LockGLESSurface( bool read, bool write )

    {

    return LockSurface( EGL_OPENGL_ES_API, read, write );

    }

bool CEGLState::UnlockGLESSurface()

    {

    return UnlockSurface( EGL_OPENGL_ES_API );

    }

bool CEGLState::SyncSurface( EGLenum api, EGLint apiVersion, CEGLSurface* surface, CEGLSurface* currentGLESReadSurface )

	{

	switch( api )

		{

		case EGL_OPENVG_API:

			{

			EGLint glesVersion = 0;

			if( surface->IsGLES1Dirty() )

				{

				glesVersion = 1;

				}

			else if( surface->IsGLES2Dirty() )

				{

				glesVersion = 2;

				}

			if( glesVersion )

				{

				if( surface != currentGLESReadSurface )

					{

					EGLINativeContextType glesCopyContext = NULL;

                    EGLINativeDisplayType glesCopyDisplay = NULL;

                    EGLINativeGLFunctions* funcs = NULL;

					bool pbuffer = ( surface->Type() == CEGLSurface::PBUFFER_SURFACE );

					if( pbuffer )

						{

						if( !(((CEGLPbufferSurface*)surface)->BindCopyContext()) )

							{

							((CEGLPbufferSurface*)surface)->ReleaseCopyContext();

							return false;

							}

						}

					else if( surface->Type() == CEGLSurface::WINDOW_SURFACE )

						{

						// \todo Remove this or handle window surface sync properly

						/*

						funcs = thread->CurrentGLESContext()->NativeGLFunctions();

						glesCopyContext = thread->CurrentGLESContext()->NativeContext();

						glesCopyDisplay = ((CEGLWindowSurface*)surface)->OsContext()->glesDisplay;

						*/

						}

					if( !(GLESInterface(glesVersion)->CopyBuffers(surface->GLESColorBuffer(), surface->Descriptor())) )

						{

						if( pbuffer )

							{

							((CEGLPbufferSurface*)surface)->ReleaseCopyContext();

							}

						return false;

						}

					if( pbuffer )

						{

						((CEGLPbufferSurface*)surface)->ReleaseCopyContext();

						}

					else if( surface->Type() == CEGLSurface::WINDOW_SURFACE )

						{

						// \todo Remove this or handle window surface sync properly

						//EGLI_ASSERT( false );

						}

					}

				else

					{

					if( !(GLESInterface(glesVersion)->CopyBuffers(surface->GLESColorBuffer(), surface->Descriptor())) )

						return false;

					}

				if( VGInterface() )

                    {

                    VGInterface()->UpdateBuffers(surface->GLESColorBuffer(), surface->Stride(), surface->Descriptor());

                    }

                surface->SetGLES1Dirty( false );

				surface->SetGLES2Dirty( false );

				}

			break;

			}

		case EGL_OPENGL_ES_API:

			{

			if( surface->IsVGDirty() )

                {

				if( !(GLESInterface(apiVersion)->UpdateBuffers(surface->VGColorBuffer(), surface->Descriptor())) )

                    {

                    return false;

                    }

                surface->SetVGDirty( false );

                }

			break;

			}

		}

	return true;

	}

bool CEGLState::LockSurface( EGLenum api, bool read, bool write )

    {

    CEGLOs::GetLock( &g_eglLock );

    CEGLSurface* readSurface = NULL;

    CEGLSurface* drawSurface = NULL;

	CEGLSurface* glesReadSurface = NULL;

	EGLint apiVersion;