/*****************************************************************************\  scaler.cpp : Implimentation for the Scaler class  Copyright (c) 1996 - 2001, Hewlett-Packard Co.  All rights reserved.  Redistribution and use in source and binary forms, with or without  modification, are permitted provided that the following conditions  are met:  1. Redistributions of source code must retain the above copyright     notice, this list of conditions and the following disclaimer.  2. Redistributions in binary form must reproduce the above copyright     notice, this list of conditions and the following disclaimer in the     documentation and/or other materials provided with the distribution.  3. Neither the name of Hewlett-Packard nor the names of its     contributors may be used to endorse or promote products derived     from this software without specific prior written permission.  THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN  NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED  TO, PATENT INFRINGEMENT; PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON  ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\*****************************************************************************/#include "header.h"APDK_BEGIN_NAMESPACE#define MAX_OUTPUT_RASTERS 32Scaler::Scaler(SystemServices* pSys,unsigned int inputwidth,               unsigned int numerator,unsigned int denominator, BOOL vip, unsigned int BytesPerPixel)        : pSS(pSys), iInputWidth(inputwidth){    ASSERT(denominator > 0);    constructor_error=NO_ERROR;    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*)pSS->AllocMem(RSBuffSize);    if (pOutputBuffer[COLORTYPE_COLOR] == NULL)    {        constructor_error=ALLOCMEM_ERROR;        return;    }	int BlackBuffSize= (int)(((float)(iOutputWidth)) * ScaleBound );    pOutputBuffer[COLORTYPE_BLACK]=(BYTE*)pSS->AllocMem(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]) 		{			pSS->FreeMemory(pOutputBuffer[i]);			pOutputBuffer[i] = NULL;		}	}}unsigned int Scaler::GetMaxOutputWidth(COLORTYPE  rastercolor){	if (rastercolor == 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	}}unsigned int Scaler::GetOutputWidth(COLORTYPE color){	if (color == COLORTYPE_COLOR)	{		if (raster.rasterdata[color])			if (myplane == COLORTYPE_BLACK)				return raster.rastersize[color];			else				return (iOutputWidth-1)*NUMBER_PLANES;  // we padded it in case of roundoff error		else			return 0;	}	else	{			if (raster.rasterdata[color])			if (myplane == COLORTYPE_COLOR)				return raster.rastersize[color];			else				return (iOutputWidth-1);  // we padded it in case of roundoff error		else 			return 0;	}}APDK_END_NAMESPACE