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|
/*
/--------------------------------------------------------------------
|
| $Id: plfilterrotate.cpp,v 1.10 2004/10/02 22:23:13 uzadow Exp $
|
| Copyright (c) 1996-1998 Ulrich von Zadow
|
\--------------------------------------------------------------------
*/
#include <math.h>
#include "plbitmap.h"
#include "plfilterrotate.h"
#include "plpoint.h"
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
PLFilterRotate::PLFilterRotate(AngleType a)
: PLFilter(),
m_Angle(a)
{}
PLFilterRotate::~PLFilterRotate()
{}
void PLFilterRotate::Apply(PLBmpBase * pBmpSource, PLBmp * pBmpDest) const
{
// Only works for 32 bpp.
PLASSERT (pBmpSource->GetBitsPerPixel() == 32);
int oldWidth = pBmpSource->GetWidth();
int oldHeight= pBmpSource->GetHeight();
int newWidth = m_Angle == oneeighty ? oldWidth : oldHeight;
int newHeight = m_Angle == oneeighty ? oldHeight : oldWidth;
// Calculate the size of the new bitmap
pBmpDest->Create (newWidth, newHeight, pBmpSource->GetPixelFormat(),
NULL, 0, pBmpSource->GetResolution());
PLPixel32 pix;
for (int newY = 0; newY < newHeight; ++newY)
{
for (int newX = 0; newX < newWidth; ++newX)
{
int oldX;
int oldY;
switch(m_Angle)
{
case ninety:
oldX = newY;
oldY = oldHeight - newX - 1;
break;
case oneeighty:
oldX = oldWidth - newX - 1;
oldY = oldHeight - newY - 1;
break;
case twoseventy:
oldY = newX;
oldX = oldWidth - newY - 1;
break;
}
pix = pBmpSource->GetPixel32(oldX,oldY);
pBmpDest->SetPixel(newX,newY,pix);
}
}
}
/*
/--------------------------------------------------------------------
|
| $Log: plfilterrotate.cpp,v $
| Revision 1.10 2004/10/02 22:23:13 uzadow
| - configure and Makefile cleanups\n- Pixelformat enhancements for several filters\n- Added PLBmpBase:Dump\n- Added PLBmpBase::GetPixelNn()-methods\n- Changed default unix byte order to BGR
|
| Revision 1.9 2004/09/11 12:41:36 uzadow
| removed plstdpch.h
|
| Revision 1.8 2004/09/09 16:52:45 artcom
| refactored PixelFormat
|
| Revision 1.7 2004/06/15 10:26:13 uzadow
| Initial nonfunctioning version of plbmpbase.
|
| Revision 1.6 2003/11/05 15:17:26 artcom
| Added ability to specify initial data in PLBitmap::Create()
|
| Revision 1.5 2003/02/27 23:01:33 uzadow
| Linux version of PLFilterRotate, nicer test output
|
| Revision 1.4 2003/02/27 22:46:56 uzadow
| Added plfilterrotate.
|
| Revision 1.1 2002/02/05 09:40:54 david
| pavel added rotate90 filter
|
\--------------------------------------------------------------------
*/
|
