/*------------------------------------------------------------------------

 *

 * EGL 1.3

 * -------

 *

 * Copyright (c) 2007 The Khronos Group Inc.

 *

 * 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.

 *

 *//**

 * \file

 * \brief	Generic OS EGL functionality (not thread safe, no window rendering)

 * \note

  *//*-------------------------------------------------------------------*/

#include "egl.h"

#include "riImage.h"

#include "riDefs.h"

#include <e32std.h>

#include <w32std.h>

#include <eglosnativewindowtype.h>

namespace OpenVGRI

{

//internal fucntions

VGImageFormat MapSymbianDisplayModeToVG(TDisplayMode aMode);

void ReadPixelsToCFbsBitmap(CFbsBitmap& aBitmap, TUint aW, TUint aH);

/*-------------------------------------------------------------------*//*!

* \brief	

* \param	

* \return	

* \note		

*//*-------------------------------------------------------------------*/

void* OSGetCurrentThreadID(void)

{

	int g_threadid = RThread().Id();

	return (void*)g_threadid;

}

/*-------------------------------------------------------------------*//*!

* \brief	

* \param	

* \return	

* \note		

*//*-------------------------------------------------------------------*/

void OSDeinitMutex(void)

{

}

void OSAcquireMutex(void)

{

}

void OSReleaseMutex(void)

{

}

/*-------------------------------------------------------------------*//*!

* \brief	

* \param	

* \return	

* \note		

*//*-------------------------------------------------------------------*/

struct OSWindowContext

{

	TNativeWindowType*  iNativeWindowType;   

};

void* OSCreateWindowContext(EGLNativeWindowType window)

{

    OSWindowContext* ctx = NULL;

    try

    {

        ctx = RI_NEW(OSWindowContext, ());

    }

	catch(std::bad_alloc)

	{

		return NULL;

	}

    ctx->iNativeWindowType = (TNativeWindowType*)window;

    return ctx;

}

void OSDestroyWindowContext(void* context)

{

    OSWindowContext* ctx = (OSWindowContext*)context;

    if(ctx)

    {

        RI_DELETE(ctx);

    }

}

bool OSIsWindow(const void* context)

{

    OSWindowContext* ctx = (OSWindowContext*)context;

    if(ctx)

    {

        return true;

    }

    return false;

}

void OSGetWindowSize(const void* context, int& width, int& height)

{

    OSWindowContext* ctx = (OSWindowContext*)context;

    if(ctx)

    {

    	width=ctx->iNativeWindowType->iSize.iWidth;

		height=ctx->iNativeWindowType->iSize.iHeight; 

    }

    else

    {

        width = 0;

        height = 0;

    }

}

EGLDisplay OSGetDisplay(EGLNativeDisplayType display_id)

{

    RI_UNREF(display_id);

    return (EGLDisplay)1;    //support only a single display

}

void OSBlitToWindow(void* context, const Drawable* drawable)

{

    OSWindowContext* ctx = (OSWindowContext*)context;

    //blit if either of iBitmap or iMaskBitmap exist

    if(ctx && ctx->iNativeWindowType->iBitmap)

    {

        TUint w = drawable->getWidth();

        TUint h = drawable->getHeight();

        //these should be same as bitmap

        if(ctx->iNativeWindowType->iBitmap)

        	{

        	CFbsBitmap* bitmap = ctx->iNativeWindowType->iBitmap;        	

        	ReadPixelsToCFbsBitmap(*bitmap, w, h);        	

        	}

    }

}

void ReadPixelsToCFbsBitmap(CFbsBitmap& aBitmap, TUint aW, TUint aH)

	{

	TSize sz = aBitmap.SizeInPixels();

	RI_ASSERT(aW==sz.iWidth);

	RI_ASSERT(aH==sz.iHeight);

	VGImageFormat f = MapSymbianDisplayModeToVG(aBitmap.DisplayMode());

	TInt bitmapDataStride = aBitmap.DataStride();

	//copy from source OpenVG model to target(CFbsBitmap) buffer			

	aBitmap.BeginDataAccess();

	//openvg returns pixels in cartesian coordinates (y+) where as CFbsBitmap

	//wants screen coordinates (y-) so we read pixels out starting at top left corner 

	TUint8* ptarget = (TUint8*)aBitmap.DataAddress()+(aH-1)*bitmapDataStride;

	vgReadPixels(ptarget, -bitmapDataStride, f, 0, 0, aW, aH);

	aBitmap.EndDataAccess(EFalse);

	}

VGImageFormat MapSymbianDisplayModeToVG(TDisplayMode aMode)

	{

	VGImageFormat f;

	switch(aMode)

		{

		case EColor16MA:

			f = VG_sARGB_8888;

			break;

		case EColor16MU:

			f = VG_sRGBX_8888;

			break;

		case EColor64K:

			f = VG_sRGB_565;

			break;

		case EGray256:

			f = VG_A_8;

			break;

		case EGray2:

			f = VG_BW_1;

			break;

		default:

			RI_ASSERT(0);

		}

	return f;

	}

EGLBoolean OSGetNativePixmapInfo(NativePixmapType pixmap, int* width, int* height, int* stride, VGImageFormat* format, int** data)

{

	TSize size = ((CFbsBitmap*)pixmap)->SizeInPixels();

    *width  = size.iWidth;

    *height = size.iHeight;

    *stride = ((CFbsBitmap*)pixmap)->DataStride();    

    *data = (int*)(((CFbsBitmap*)pixmap)->DataAddress());

    TDisplayMode mode = ((CFbsBitmap*)pixmap)->DisplayMode(); 

	switch(mode)

	{

	case EColor16MA:

		*format = VG_sRGBA_8888;

		break;

	case EColor16MU:

		*format = VG_sRGBX_8888;

		break;

	case EColor64K:

		*format = VG_sRGB_565;

		break;

	case EGray256:

		*format = VG_A_8;

		break;

	case EGray2:

		*format = VG_BW_1;

		break;

	default:

		RI_ASSERT(0);

	}

    return EGL_TRUE;

}

}   //namespace OpenVGRI