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/*
/--------------------------------------------------------------------
|
| $Id: plfilterlightness.cpp,v 1.9 2004/09/11 12:41:36 uzadow Exp $
|
| Copyright (c) 1996-2002 Ulrich von Zadow
|
\--------------------------------------------------------------------
*/
#include "plfilterlightness.h"
#include "plbitmap.h"
PLFilterLightness::PLFilterLightness(int lightness)
: PLFilter(),
m_lightness(lightness)
{
}
PLFilterLightness::~PLFilterLightness()
{
}
void PLFilterLightness::Apply(PLBmpBase * pBmpSource, PLBmp * pBmpDest) const
{
int total = 0;
double lightness = 2.55 * (double) (m_lightness);
PLASSERT (pBmpSource->GetBitsPerPixel() == 32);
pBmpDest->Create (pBmpSource->GetWidth(),
pBmpSource->GetHeight(),
pBmpSource->GetPixelFormat(),
NULL, 0,
pBmpSource->GetResolution());
PLBYTE ** pSrcLines = pBmpSource->GetLineArray();
PLBYTE ** pDstLines = pBmpDest->GetLineArray();
int destWidth = pBmpDest->GetWidth();
double red, green, blue;
for (int y = 0; y < pBmpDest->GetHeight(); ++y)
{ // For each line
PLBYTE * pSrcPixel = pSrcLines[y];
PLBYTE * pDstPixel = pDstLines[y];
for (int x = 0; x < destWidth; ++x)
{
red = (double) pSrcPixel[PL_RGBA_RED] + lightness;
green = (double) pSrcPixel[PL_RGBA_GREEN] + lightness;
blue = (double) pSrcPixel[PL_RGBA_BLUE] + lightness;
if(red >= 255.0)
pDstPixel[PL_RGBA_RED] = (PLBYTE) 255;
else if (red < 0.0)
pDstPixel[PL_RGBA_RED] = (PLBYTE) 0;
else
pDstPixel[PL_RGBA_RED] = (PLBYTE) red;
if(green >= 255.0)
pDstPixel[PL_RGBA_GREEN] = (PLBYTE) 255;
else if (green < 0.0)
pDstPixel[PL_RGBA_GREEN] = (PLBYTE) 0;
else
pDstPixel[PL_RGBA_GREEN] = (PLBYTE) green;
if(blue >= 255.0)
pDstPixel[PL_RGBA_BLUE] = (PLBYTE) 255;
else if (blue < 0.0)
pDstPixel[PL_RGBA_BLUE] = (PLBYTE) 0;
else
pDstPixel[PL_RGBA_BLUE] = (PLBYTE) blue;
pSrcPixel += 4;
pDstPixel += 4;
}
}
}
|
