/*
|==============================================================================
| Copyright (C) 2006-2011 Prosilica.  All Rights Reserved.  Reproduction or
| disclosure of this file or its contents without the prior written consent of
| Prosilica is prohibited.
|==============================================================================
|
| File:			    ImageLibTiff.cpp
|
| Project/lib:	    ImageLib
|
| Target:		    any     
|
| Description:	    implement a function that convert an existing tPvFrame to
|                   a TIFF file using the TIFF library
|
| Notes:		    To recompile this, you will need to either have the tiff
|                   library already installed on your system. On Windows, you
|                   will have to grab it from http://www.libtiff.org and
|                   integrate the needed files with this file.
|
|==============================================================================
| dd/mon/yy  Author		Notes
|------------------------------------------------------------------------------
| 01/01/06	 JLV		Original.
| 24/03/11   AKA		Updated to LibTIFF 3.9.4. Now builds with VC++ 2008, 2010.
|==============================================================================
*/

//===== INCLUDE FILES =========================================================


#include <ImageLib.h>
#include <PvApi.h>
#include <assert.h>
#include <memory.h>
#include "tiffio.h"

//===== #DEFINES ==============================================================


#define ASSERT(x)	        assert(x)
#define ULONG_PADDING(x)    (((x+3) & ~3) - x)

//#if defined(_LINUX) || defined(_QNX) || defined(_OSX)
#define USHORT unsigned short
#define ULONG  unsigned long
#define UCHAR  unsigned char
//#endif

typedef struct {

    unsigned char LByte;
    unsigned char MByte;
    unsigned char UByte;

} Packed12BitsPixel_t;

//===== TYPE DEFINITIONS ======================================================

//===== FUNCTION PROTOTYPES ===================================================

void F_WriteStandardTags(TIFF* tiff, const tPvFrame* pFrame);
void F_WriteFrameBuffer(TIFF* tiff, const tPvFrame* pFrame);

//===== DATA (PUBLIC) =========================================================

//===== DATA (PRIVATE) ========================================================

//===== IMPLEMENTATION ========================================================

bool ImageWriteTiff(const char* filename, const tPvFrame* pFrame)
{
	TIFF* tiff = TIFFOpen(filename, "w");

	if (!tiff)
		return false;

	F_WriteStandardTags(tiff, pFrame);
	F_WriteFrameBuffer(tiff, pFrame);

	TIFFClose(tiff);

	return true;
}


void F_WriteStandardTags(TIFF* tiff, const tPvFrame* pFrame)
{
	USHORT				bitsPerSample;
	int					result;

	bitsPerSample = (pFrame->BitDepth > 8) ? 16 : 8;

	result = TIFFSetField(tiff, TIFFTAG_IMAGEWIDTH, (ULONG) pFrame->Width);
	ASSERT(result);
	result = TIFFSetField(tiff, TIFFTAG_IMAGELENGTH, (ULONG) pFrame->Height);
	ASSERT(result);
	result = TIFFSetField(tiff, TIFFTAG_COMPRESSION, (USHORT) 1); // No compression
	ASSERT(result);
	result = TIFFSetField(tiff, TIFFTAG_XRESOLUTION, (float) 1.0F);
	ASSERT(result);
	result = TIFFSetField(tiff, TIFFTAG_YRESOLUTION, (float) 1.0F);
	ASSERT(result);
	result = TIFFSetField(tiff, TIFFTAG_RESOLUTIONUNIT, (USHORT) 1); // No units
	ASSERT(result);
	result = TIFFSetField(tiff, TIFFTAG_PLANARCONFIG, (USHORT) 1);
	ASSERT(result);

	if ((pFrame->Format == ePvFmtMono8) || (pFrame->Format == ePvFmtMono16) || (pFrame->Format == ePvFmtMono12Packed))
	{
		// Monochrome

		result = TIFFSetField(tiff, TIFFTAG_BITSPERSAMPLE, (USHORT) bitsPerSample);
		ASSERT(result);
		result = TIFFSetField(tiff, TIFFTAG_PHOTOMETRIC, (USHORT) 1); // Monochrome, black=0
		ASSERT(result);
	}
    else if ((pFrame->Format == ePvFmtRgba32) || (pFrame->Format == ePvFmtBgra32))
	{
		// Color

		result = TIFFSetField(tiff, TIFFTAG_BITSPERSAMPLE, (USHORT) bitsPerSample,
							  (USHORT) bitsPerSample, (USHORT) bitsPerSample);
		ASSERT(result);
		result = TIFFSetField(tiff, TIFFTAG_SAMPLESPERPIXEL, (USHORT) 4);
		ASSERT(result);
		result = TIFFSetField(tiff, TIFFTAG_PHOTOMETRIC, (USHORT) 2); // Rgb color
		ASSERT(result);
	}
	else if ((pFrame->Format != ePvFmtYuv411) && (pFrame->Format != ePvFmtYuv422) && (pFrame->Format != ePvFmtYuv444))
	{
		// Color

		result = TIFFSetField(tiff, TIFFTAG_BITSPERSAMPLE, (USHORT) bitsPerSample,
							  (USHORT) bitsPerSample, (USHORT) bitsPerSample);
		ASSERT(result);
		result = TIFFSetField(tiff, TIFFTAG_SAMPLESPERPIXEL, (USHORT) 3);
		ASSERT(result);
		result = TIFFSetField(tiff, TIFFTAG_PHOTOMETRIC, (USHORT) 2); // Rgb color
		ASSERT(result);
	}
	else
	{
		ASSERT(false);
	}

}


void F_WriteFrameBuffer(TIFF* tiff, const tPvFrame* pFrame)
{
	int					pixelSize;			// In bytes
	int					result;

	switch (pFrame->Format)
	{
	case ePvFmtMono8:		pixelSize = 1;		break;
    case ePvFmtMono12Packed:
	case ePvFmtMono16:		pixelSize = 2;		break;
	case ePvFmtRgb24:
    case ePvFmtBgr24:       pixelSize = 3;		break;
	case ePvFmtRgb48:		pixelSize = 6;		break;
	case ePvFmtBayer8:		pixelSize = 3;		break;
    case ePvFmtBayer12Packed:
	case ePvFmtBayer16:		pixelSize = 6;		break;
    case ePvFmtRgba32:
    case ePvFmtBgra32:      pixelSize = 4;		break;
    
	default:
		ASSERT(false);
		return;
	}

	const int destLineSize = pixelSize * pFrame->Width;			// In bytes

	UCHAR* const tmpBuffer     = new UCHAR[destLineSize * pFrame->Height];
    UCHAR* const tmpBufferEnd  = tmpBuffer + destLineSize * pFrame->Height;


    if(tmpBuffer)
    {

	    //
	    // Copy or manipulate data into temporary buffer.
	    //

	    if (pFrame->Format == ePvFmtMono8)
	    {
		    memcpy(tmpBuffer, pFrame->ImageBuffer, pFrame->ImageSize);
	    }
	    else if (pFrame->Format == ePvFmtMono16)
	    {
		    const USHORT*		pSrc = (USHORT*)pFrame->ImageBuffer;
		    const USHORT* const	pSrcEnd = pSrc + (pFrame->Width * pFrame->Height);
		    USHORT*				pDest = (USHORT*)tmpBuffer;
		    const ULONG			bitshift = 16 - pFrame->BitDepth;

		    while (pSrc < pSrcEnd)
			    *(pDest++) = *(pSrc++) << bitshift;
	    }
	    else if (pFrame->Format == ePvFmtMono12Packed)
        {
	        const Packed12BitsPixel_t*  pSrc = (const Packed12BitsPixel_t*)pFrame->ImageBuffer;
            const Packed12BitsPixel_t*  pSrcEnd = (const Packed12BitsPixel_t*)((unsigned char*)pFrame->ImageBuffer + pFrame->ImageSize);
	        USHORT*				        pDest = (USHORT*)tmpBuffer;
            USHORT*                     pDestEnd = (USHORT*)tmpBufferEnd;
	        const ULONG			        bitshift = 16 - pFrame->BitDepth;
            USHORT                      pixel;

	        while (pSrc < pSrcEnd)
	        {
		        for (ULONG i = 0; i < pFrame->Width && pSrc < pSrcEnd; i+=2)
                {
                    if(pDest < pDestEnd)
                    {
                        pixel = (USHORT)pSrc->LByte << 4;
                        pixel += ((USHORT)pSrc->MByte & 0xF0) >> 4;
                        *(pDest++) = pixel << bitshift;
                        
                        if(pDest < pDestEnd)
                        {
                            pixel = (USHORT)pSrc->UByte << 4;
                            pixel += ((USHORT)pSrc->MByte & 0x0F) >> 4;
                            *(pDest++) = pixel << bitshift;
                        }
                    }

                    pSrc++;
                }
	        }  
        }
	    else if (pFrame->Format == ePvFmtBayer8)
	    {
		    UCHAR* const		pDest = tmpBuffer;

		    PvUtilityColorInterpolate(pFrame, &pDest[0], &pDest[1], &pDest[2], 2, 0);
	    }
	    else if (pFrame->Format == ePvFmtBayer16)
	    {
		    USHORT*				pDest = (USHORT*)tmpBuffer;
		    const USHORT* const	pDestEnd = pDest + (pFrame->Width * pFrame->Height * 3);
		    const ULONG			bitshift = 16 - pFrame->BitDepth;

		    PvUtilityColorInterpolate(pFrame, &pDest[0], &pDest[1], &pDest[2], 2, 0);

		    while (pDest < pDestEnd)
			    *(pDest++) <<= bitshift;
	    }
        else if (pFrame->Format == ePvFmtBayer12Packed)
        {
            tPvFrame lFrame = *pFrame;

            lFrame.Format           = ePvFmtBayer16;
            lFrame.ImageBufferSize  = pFrame->Width * pFrame->Height * 2;
            lFrame.ImageBuffer      = new UCHAR[lFrame.ImageBufferSize];

            if(lFrame.ImageBuffer)
            {
	            const Packed12BitsPixel_t*  pSrc = (const Packed12BitsPixel_t*)pFrame->ImageBuffer;
                const Packed12BitsPixel_t*  pSrcEnd = (const Packed12BitsPixel_t*)((unsigned char*)pFrame->ImageBuffer + pFrame->ImageSize);
                USHORT*				        pDest = (USHORT*)lFrame.ImageBuffer;
                USHORT*                     pDestEnd = (USHORT*)lFrame.ImageBuffer + pFrame->Width * pFrame->Height;
                const ULONG			        bitshift = 16 - pFrame->BitDepth;
                USHORT                      pixel1,pixel2;

	            while (pSrc < pSrcEnd && pDest < pDestEnd)
	            {
		            for (ULONG i = 0; i < pFrame->Width && pSrc < pSrcEnd; i+=2)
                    {
                        pixel1 = (USHORT)pSrc->LByte << 4;
                        pixel1 += ((USHORT)pSrc->MByte & 0xF0) >> 4;
                        
                        pixel2 = (USHORT)pSrc->UByte << 4;
                        pixel2 += ((USHORT)pSrc->MByte & 0x0F) >> 4;

                        if(pDest < pDestEnd)
                        {
                            *(pDest++) = pixel1;
                            if(pDest < pDestEnd)
                                *(pDest++) = pixel2;
                        }

                        pSrc++;
                    }
	            }

	            pDest = (USHORT*)tmpBuffer;
	            pDestEnd = pDest + (pFrame->Width * pFrame->Height * 3);

	            PvUtilityColorInterpolate(&lFrame, &pDest[0], &pDest[1], &pDest[2], 2, 0);

	            while (pDest < pDestEnd)
		            *(pDest++) <<= bitshift;

                delete (UCHAR*)lFrame.ImageBuffer;
            }
        }
	    else if (pFrame->Format == ePvFmtRgb24)
	    {
		    memcpy(tmpBuffer, pFrame->ImageBuffer, pFrame->ImageSize);
	    }
	    else if (pFrame->Format == ePvFmtBgr24)
	    {
		    memcpy(tmpBuffer, pFrame->ImageBuffer, pFrame->ImageSize);
	    }
	    else if (pFrame->Format == ePvFmtRgba32)
	    {
		    memcpy(tmpBuffer, pFrame->ImageBuffer, pFrame->ImageSize);
	    }
	    else if (pFrame->Format == ePvFmtBgra32)
	    {
		    memcpy(tmpBuffer, pFrame->ImageBuffer, pFrame->ImageSize);
	    }
	    else if (pFrame->Format == ePvFmtRgb48)
	    {
		    const USHORT*		pSrc = (USHORT*)pFrame->ImageBuffer;
		    const USHORT* const	pSrcEnd = pSrc + (pFrame->Width * pFrame->Height * 3);
		    USHORT*				pDest = (USHORT*)tmpBuffer;
		    const ULONG			bitshift = 16 - pFrame->BitDepth;

		    while (pSrc < pSrcEnd)
			    *(pDest++) = *(pSrc++) << bitshift;
	    }


	    //
	    // Write temporary buffer into TIFF file.
	    //

	    UCHAR* pScanLine = tmpBuffer;

	    for (ULONG i = 0; i < pFrame->Height; i++)
	    {
		    result = TIFFWriteScanline(tiff, pScanLine, i, 0);
		    ASSERT(result);

		    pScanLine += destLineSize; 
	    }


	    delete [] tmpBuffer;

    }
}