// Copyright (c) 2009 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:
// Reference EGL implementation to support EGL sync objects and OpenWF extensions

#include "eglprivate.h"
#include <e32debug.h>

// Helper macros
//
#define GET_THREAD_SESSION(s,r) CEglThreadSession* s = CEglThreadSession::Static(); \
                                if (!s) \
                                    { \
                                    return r; \
                                    }

#define PANIC_NOT_SUPPORTED     RDebug::Printf("EGL Panic %s %s:%d\n",__func__,__FILE__,__LINE__);User::Panic(KEglPanicCategory, EEglPanicNotSupported); \
                                return 0;

// EGL API entrypoints
//
EXPORT_C EGLDisplay eglGetDisplay(NativeDisplayType display_id)
	{
	GET_THREAD_SESSION(session, EGL_NO_DISPLAY)
	return session->EglGetDisplay(display_id);
	}

EXPORT_C EGLBoolean eglInitialize(EGLDisplay dpy, EGLint* major, EGLint* minor)
	{
	GET_THREAD_SESSION(session, EGL_FALSE)
	return session->EglInitialize(dpy, major, minor);
	}

EXPORT_C EGLBoolean eglTerminate(EGLDisplay dpy)
	{
	GET_THREAD_SESSION(session, EGL_FALSE)
	return session->EglTerminate(dpy);
	}

EXPORT_C EGLBoolean eglReleaseThread(void)
	{
	// do not call CEglThreadSession::Static() here as it may create thread state if it does not exist
	//
	CEglThreadSession* session = reinterpret_cast<CEglThreadSession*>(Dll::Tls());
	if (session)
		{
		delete session;
		Dll::FreeTls();
		}

	return EGL_TRUE;
	}

EXPORT_C EGLint eglGetError(void)
	{
	// EGL spec section 3.11: GetError will create thread state object, 
	// it is recommended not to call this API immediately after calling ReleaseThread
	// for that reason.
	// If session creation fails, we returns BAD_ALLOC
	//
	GET_THREAD_SESSION(session, EGL_BAD_ALLOC)
	return session->EglGetError();
	}

EXPORT_C const char* eglQueryString(EGLDisplay dpy, EGLint name)
	{
	GET_THREAD_SESSION(session, NULL)
	return session->EglQueryString(dpy, name);
	}

EXPORT_C TFuncPtrEglProc eglGetProcAddress (const char *procname)
	{
	GET_THREAD_SESSION(session, NULL)
	return session->EglGetProcAddress(procname);
	}

// Unsupported EGL APIs
//
EXPORT_C EGLBoolean eglGetConfigs(EGLDisplay /*dpy*/, EGLConfig */*configs*/,
			 EGLint /*config_size*/, EGLint */*num_config*/)
	{
	PANIC_NOT_SUPPORTED
	}

EXPORT_C EGLBoolean eglChooseConfig(EGLDisplay /*dpy*/, const EGLint */*attrib_list*/,
			   EGLConfig */*configs*/, EGLint /*config_size*/,
			   EGLint */*num_config*/)
	{
	PANIC_NOT_SUPPORTED
	}
	
EXPORT_C EGLBoolean eglGetConfigAttrib(EGLDisplay /*dpy*/, EGLConfig /*config*/,
			      EGLint /*attribute*/, EGLint */*value*/)
	{
	PANIC_NOT_SUPPORTED	
	}

EXPORT_C EGLSurface eglCreateWindowSurface(EGLDisplay /*dpy*/, EGLConfig /*config*/,
				  EGLNativeWindowType /*win*/,
				  const EGLint */*attrib_list*/)
	{
	PANIC_NOT_SUPPORTED	
	}

EXPORT_C EGLSurface eglCreatePbufferSurface(EGLDisplay /*dpy*/, EGLConfig /*config*/,
				   const EGLint */*attrib_list*/)
	{
	PANIC_NOT_SUPPORTED
	}

EXPORT_C EGLSurface eglCreatePixmapSurface(EGLDisplay /*dpy*/, EGLConfig /*config*/,
				  EGLNativePixmapType /*pixmap*/,
				  const EGLint */*attrib_list*/)
	{
	PANIC_NOT_SUPPORTED
	}

EXPORT_C EGLBoolean eglDestroySurface(EGLDisplay /*dpy*/, EGLSurface /*surface*/)
	{
	PANIC_NOT_SUPPORTED
	}

EXPORT_C EGLBoolean eglQuerySurface(EGLDisplay /*dpy*/, EGLSurface /*surface*/,
			   EGLint /*attribute*/, EGLint */*value*/)
	{
	PANIC_NOT_SUPPORTED
	}

EXPORT_C EGLBoolean eglBindAPI(EGLenum /*api*/)
	{
	PANIC_NOT_SUPPORTED
	}

EXPORT_C EGLenum eglQueryAPI(void)
	{
	PANIC_NOT_SUPPORTED	
	}

EXPORT_C EGLBoolean eglWaitClient(void)
	{
	PANIC_NOT_SUPPORTED	
	}

EXPORT_C EGLSurface eglCreatePbufferFromClientBuffer(
	      EGLDisplay /*dpy*/, EGLenum /*buftype*/, EGLClientBuffer /*buffer*/,
	      EGLConfig /*config*/, const EGLint */*attrib_list*/)
	{
	PANIC_NOT_SUPPORTED
	}

EXPORT_C EGLBoolean eglSurfaceAttrib(EGLDisplay /*dpy*/, EGLSurface /*surface*/,
			    EGLint /*attribute*/, EGLint /*value*/)
	{
	PANIC_NOT_SUPPORTED	
	}

EXPORT_C EGLBoolean eglBindTexImage(EGLDisplay /*dpy*/, EGLSurface /*surface*/, EGLint /*buffer*/)
	{
	PANIC_NOT_SUPPORTED
	}

EXPORT_C EGLBoolean eglReleaseTexImage(EGLDisplay /*dpy*/, EGLSurface /*surface*/, EGLint /*buffer*/)
	{
	PANIC_NOT_SUPPORTED
	}

EXPORT_C EGLBoolean eglSwapInterval(EGLDisplay /*dpy*/, EGLint /*interval*/)
	{
	PANIC_NOT_SUPPORTED
	}

EXPORT_C EGLContext eglCreateContext(EGLDisplay /*dpy*/, EGLConfig /*config*/,
			    EGLContext /*share_context*/,
			    const EGLint */*attrib_list*/)
	{
	PANIC_NOT_SUPPORTED
	}

EXPORT_C EGLBoolean eglDestroyContext(EGLDisplay /*dpy*/, EGLContext /*ctx*/)
	{
	PANIC_NOT_SUPPORTED	
	}

EXPORT_C EGLBoolean eglMakeCurrent(EGLDisplay /*dpy*/, EGLSurface /*draw*/,
			  EGLSurface /*read*/, EGLContext /*ctx*/)
	{
	PANIC_NOT_SUPPORTED	
	}

EXPORT_C EGLContext eglGetCurrentContext(void)
	{
	PANIC_NOT_SUPPORTED
	}

EXPORT_C EGLSurface eglGetCurrentSurface(EGLint /*readdraw*/)
	{
	PANIC_NOT_SUPPORTED
	}

EXPORT_C EGLDisplay eglGetCurrentDisplay(void)
	{
	PANIC_NOT_SUPPORTED
	}

EXPORT_C EGLBoolean eglQueryContext(EGLDisplay /*dpy*/, EGLContext /*ctx*/,
			   EGLint /*attribute*/, EGLint */*value*/)
	{
	PANIC_NOT_SUPPORTED
	}

EXPORT_C EGLBoolean eglWaitGL(void)
	{
	PANIC_NOT_SUPPORTED
	}

EXPORT_C EGLBoolean eglWaitNative(EGLint /*engine*/)
	{
	PANIC_NOT_SUPPORTED
	}

EXPORT_C EGLBoolean eglSwapBuffers(EGLDisplay /*dpy*/, EGLSurface /*surface*/)
	{
	PANIC_NOT_SUPPORTED
	}

EXPORT_C EGLBoolean eglCopyBuffers(EGLDisplay /*dpy*/, EGLSurface /*surface*/,
			  EGLNativePixmapType /*target*/)
	{
	PANIC_NOT_SUPPORTED
	}

// EGL_KHR_reusable_sync APIs
//
EGLSyncKHR eglCreateSyncKHR(EGLDisplay dpy, EGLenum type, const EGLint *attrib_list)
    {
    GET_THREAD_SESSION(session, EGL_NO_SYNC_KHR)
    return session->EglCreateSyncKhr(dpy, type, attrib_list);
    }

EGLBoolean eglDestroySyncKHR(EGLDisplay dpy, EGLSyncKHR sync)
    {
    GET_THREAD_SESSION(session, EGL_FALSE)
    return session->EglDestroySyncKhr(dpy, sync);
    }

EGLint eglClientWaitSyncKHR(EGLDisplay dpy, EGLSyncKHR sync, EGLint flags, EGLTimeKHR timeout)
    {
    GET_THREAD_SESSION(session, EGL_FALSE)
    return session->EglClientWaitSyncKhr(dpy, sync, flags, timeout);
    }

EGLBoolean eglSignalSyncKHR(EGLDisplay dpy, EGLSyncKHR sync, EGLenum mode)
    {
    GET_THREAD_SESSION(session, EGL_FALSE)
    return session->EglSignalSyncKhr(dpy, sync, mode);
    }

EGLBoolean eglGetSyncAttribKHR(EGLDisplay dpy, EGLSyncKHR sync, EGLint attribute, EGLint *value)
    {
    GET_THREAD_SESSION(session, EGL_FALSE)
    return session->EglGetSyncAttribKhr(dpy, sync, attribute, value);
    }

// Private extensions
//
EGLint egl_Private_SignalSyncNOK(EGLDisplay dpy, EGLSyncKHR sync, EGLenum mode)
    {
    GET_THREAD_SESSION(session, EGL_BAD_ALLOC)
    return session->EglSignalSyncInternal(dpy, sync, mode);
    }

// Debug APIs
//
#ifdef _DEBUG

#define GET_THREAD_SESSION_ASSERT(s)    CEglThreadSession* s = CEglThreadSession::Static(); \
                                        __ASSERT_DEBUG(s, User::Panic(KEglPanicCategory, EEglPanicInvalidSession));

void egliDebugHeapMarkStart()
    {
    GET_THREAD_SESSION_ASSERT(session)
    session->EglHeapMarkStart();
    }

EGLint egliDebugHeapMarkEnd(EGLint count)
    {
    GET_THREAD_SESSION_ASSERT(session)    
    return session->EglHeapMarkEnd(count);
    }

void egliDebugSetBurstAllocFail(EGLenum type, EGLint rate, EGLint burst)
    {
    GET_THREAD_SESSION_ASSERT(session)
    session->EglHeapSetBurstAllocFail(type, rate, burst);
}
#endif //_DEBUG