/*****************************************************************************\
  Scaler.cpp : Implimentation for the Scaler class

  Copyright (c) 1996 - 2015, HP Co.
  All rights reserved.

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  THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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\*****************************************************************************/

#include "CommonDefinitions.h"
#include "Processor.h"
#include "Scaler.h"

#define MAX_OUTPUT_RASTERS 32

Scaler::Scaler(unsigned int inputwidth, unsigned int numerator,
               unsigned int denominator, bool bVIP, unsigned int BytesPerPixel,
               unsigned int iNumInks)
{

    iInputWidth = inputwidth;
    rowremainder = remainder;
    NumInks = iNumInks;
    vip = bVIP;

    ScaleFactor= (float)numerator / (float)denominator;
    if (ScaleFactor > (float)MAX_OUTPUT_RASTERS)      //
    {
        constructor_error = INDEX_OUT_OF_RANGE;
        return;
    }
    int factor = (int)ScaleFactor;
    float rem = ScaleFactor - (float)factor;
    rem *= 1000;
    remainder = (int)rem;

    iOutputWidth = (int) (((float)iInputWidth / (float)denominator) *
                          (float)numerator);
    iOutputWidth++;         // safety measure to protect against roundoff error

    if (numerator == denominator)
        scaling = false;
    else scaling = true;

    // ScaleBound=max number of output rows per input row;
    // i.e., if scale=4.28, then sometimes 5 rows will come out

    int ScaleBound = int(ScaleFactor);
    if  (ScaleFactor > (float) ScaleBound)
        ScaleBound++;

    // allocate a buffer for one output row
    int RSBuffSize = (int) (((float)(BytesPerPixel*iOutputWidth)) * ScaleBound );
    pOutputBuffer[COLORTYPE_COLOR] = (BYTE *) new BYTE[RSBuffSize];
    if (pOutputBuffer[COLORTYPE_COLOR] == NULL)
    {
        constructor_error = ALLOCMEM_ERROR;
        return;
    }
    int BlackBuffSize = (int) (((float) (iOutputWidth)) * ScaleBound );
    pOutputBuffer[COLORTYPE_BLACK] = (BYTE*) new BYTE[BlackBuffSize];
    if (pOutputBuffer[COLORTYPE_BLACK] == NULL)
    {
        constructor_error = ALLOCMEM_ERROR;
        return;
    }

    if (ScaleFactor < 2.0)
        ReplicateOnly = true;
    else
        ReplicateOnly = false;

    if (ScaleFactor > (float) factor)
        fractional = true;
    else fractional = false;
}

Scaler::~Scaler ()
{
    for (int i = COLORTYPE_COLOR; i < MAX_COLORTYPE; i++)
    {
        if (pOutputBuffer[i]) 
        {
            delete [] pOutputBuffer[i];
            pOutputBuffer[i] = NULL;
        }
    }
}

unsigned int Scaler::GetMaxOutputWidth()
{
	if (myplane == COLORTYPE_COLOR)
	{
		return (iOutputWidth-1)*NUMBER_PLANES;  // we padded it in case of roundoff error
	}
	else
	{	
		return (iOutputWidth-1);  // we padded it in case of roundoff error
	}
}

bool Scaler::Process(RASTERDATA* raster_in)
{
    iRastersDelivered=0;

    if (raster_in == NULL || (raster_in->rasterdata[COLORTYPE_COLOR] == NULL && raster_in->rasterdata[COLORTYPE_BLACK] == NULL))
    {
        rowremainder=remainder;
        return false;
    }

    if (!scaling)
	{
		// just copy both to output buffer
		for (int i = COLORTYPE_COLOR; i < MAX_COLORTYPE; i++)
		{
			if (raster_in->rasterdata[i])
			{
				memcpy(pOutputBuffer[i], raster_in->rasterdata[i], raster_in->rastersize[i]);
			}
		}
		iRastersReady = 1;
		return true;
    }

	if (myplane == COLORTYPE_COLOR)
	{
		if (raster_in->rasterdata[COLORTYPE_BLACK])
		{
			memcpy(pOutputBuffer[COLORTYPE_BLACK], raster_in->rasterdata[COLORTYPE_BLACK], raster_in->rastersize[COLORTYPE_BLACK]);
		}
	}

	if (myplane == COLORTYPE_BLACK)
	{
		if (raster_in->rasterdata[COLORTYPE_COLOR])
		{
			memcpy(pOutputBuffer[COLORTYPE_COLOR], raster_in->rasterdata[COLORTYPE_COLOR], raster_in->rastersize[COLORTYPE_COLOR]);
		}
	}

    // multiply row
    unsigned int ifactor = (unsigned int) (int) ScaleFactor;
    unsigned int targptr=0;
    unsigned int sourceptr=0;
    unsigned int rem = remainder;

	if (myplane == COLORTYPE_COLOR || myplane == COLORTYPE_BOTH)
	{
		if (raster_in->rasterdata[COLORTYPE_COLOR])
		{
			if (vip)                   // RGB values interleaved
			{
				unsigned int width = iInputWidth*3;
				for (unsigned int i=0; i < width; i += 3)
				{
					unsigned int factor = ifactor;
					if (rem >= 1000)
					{
						factor++;
						rem -= 1000;
					}
					for (unsigned int j=0; j < factor; j++)
					{
						pOutputBuffer[COLORTYPE_COLOR][targptr++] = raster_in->rasterdata[COLORTYPE_COLOR][i];
						pOutputBuffer[COLORTYPE_COLOR][targptr++] = raster_in->rasterdata[COLORTYPE_COLOR][i+1];
						pOutputBuffer[COLORTYPE_COLOR][targptr++] = raster_in->rasterdata[COLORTYPE_COLOR][i+2];
					}
					rem += remainder;
				}
			}
			else            // KCMY values NOT interleaved
							// iInputWidth = bytes per plane
			for (unsigned int i=0; i < NumInks; i++)  // loop over planes
			{
				unsigned int planecount=0;          // count output bytes for this plane
				unsigned int src=0;                 // count input bytes for this plane
				while ((planecount < iOutputWidth-1) && (src < iInputWidth))
				{
					unsigned int factor = ifactor;
					if (rem >= 1000)
					{
						factor++;
						rem -= 1000;
					}
					for (unsigned int j=0; (j < factor) && (planecount < iOutputWidth-1); j++)
					{
						pOutputBuffer[COLORTYPE_COLOR][targptr++] = raster_in->rasterdata[COLORTYPE_COLOR][sourceptr];
						planecount++;
					}
					rem += remainder;
					sourceptr++; src++;
				}
				while (planecount < iOutputWidth-1)     // fill out odd bytes so all planes are equal
				{
					pOutputBuffer[COLORTYPE_COLOR][targptr++] = raster_in->rasterdata[COLORTYPE_COLOR][sourceptr-1];
					planecount++;
				}

			}
		}
	}

	ifactor = (unsigned int) (int) ScaleFactor;
    targptr=0;
    sourceptr=0;
    rem = remainder;

	if (myplane == COLORTYPE_BLACK || myplane == COLORTYPE_BOTH)
	{	
		if (raster_in->rasterdata[COLORTYPE_BLACK])
		{	
			// K values NOT interleaved
			// iInputWidth = bytes per plane
			unsigned int planecount=0;          // count output bytes for this plane
			unsigned int src=0;                 // count input bytes for this plane
			while ((planecount < iOutputWidth-1) && (src < iInputWidth))
			{
				unsigned int factor = ifactor;
				if (rem >= 1000)
				{
					factor++;
					rem -= 1000;
				}
				for (unsigned int j=0; (j < factor) && (planecount < iOutputWidth-1); j++)
				{
					pOutputBuffer[COLORTYPE_BLACK][targptr++] = raster_in->rasterdata[COLORTYPE_BLACK][sourceptr];
					planecount++;
				}
				rem += remainder;
				sourceptr++; src++;
			}
			while (planecount < iOutputWidth-1)     // fill out odd bytes so all planes are equal
			{
				pOutputBuffer[COLORTYPE_BLACK][targptr++] = raster_in->rasterdata[COLORTYPE_BLACK][sourceptr-1];
				planecount++;
			}
		}
	}

    unsigned int factor = ifactor;
    if (rowremainder >= 1000)
    {
        factor++;
        rowremainder -= 1000;
    }
	if (myplane == COLORTYPE_BLACK && raster_in->rasterdata[COLORTYPE_COLOR])
		iRastersReady = 1;
	else
		iRastersReady=factor;
    iRastersDelivered=0;
    rowremainder += remainder;
 return true;
}

bool Scaler::NextOutputRaster(RASTERDATA &next_raster)
{
    if (iRastersReady == 0)
        return false;

    if (myplane == COLORTYPE_BLACK)
    {
        if (raster.rasterdata[COLORTYPE_BLACK] == NULL)
            iRastersReady = 1;
    }
    if (myplane == COLORTYPE_COLOR)
    {
        iRastersReady--;
	iRastersDelivered++;
    }
    bool    bval = false;
    if (raster.rastersize[COLORTYPE_BLACK] > 0)
    {
        next_raster.rastersize[COLORTYPE_BLACK] = raster.rastersize[COLORTYPE_BLACK];
        next_raster.rasterdata[COLORTYPE_BLACK] = pOutputBuffer[COLORTYPE_BLACK];
        bval = true;
    }
    else
    {
        next_raster.rastersize[COLORTYPE_BLACK] = 0;
        next_raster.rasterdata[COLORTYPE_BLACK] = NULL;
    }
    if (raster.rastersize[COLORTYPE_COLOR] > 0)
    {
        next_raster.rastersize[COLORTYPE_COLOR] = raster.rastersize[COLORTYPE_COLOR];
        next_raster.rasterdata[COLORTYPE_COLOR] = pOutputBuffer[COLORTYPE_COLOR];
        bval = true;
    }
    else
    {
        next_raster.rastersize[COLORTYPE_COLOR] = 0;
        next_raster.rasterdata[COLORTYPE_COLOR] = NULL;
    }
    return bval;
}