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/*****************************************************************************\
scaler.cpp : Implimentation for the Scaler class
Copyright (c) 1996 - 2015, HP 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 HP 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 32
Scaler::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;
for (int i = COLORTYPE_COLOR; i < MAX_COLORTYPE; i++)
{
pOutputBuffer[i] = NULL;
}
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;
}
// Initialize RGB buffer to white
if (vip)
{
memset(pOutputBuffer[COLORTYPE_COLOR], 0xFF, RSBuffSize);
}
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
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