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parastretch.h

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00001 /*
00002     parastretch - image stretching functions
00003     Copyright (C) 2000  Alexander Pipelka
00004  
00005     This library is free software; you can redistribute it and/or
00006     modify it under the terms of the GNU Library General Public
00007     License as published by the Free Software Foundation; either
00008     version 2 of the License, or (at your option) any later version.
00009  
00010     This library is distributed in the hope that it will be useful,
00011     but WITHOUT ANY WARRANTY; without even the implied warranty of
00012     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013     Library General Public License for more details.
00014  
00015     You should have received a copy of the GNU Library General Public
00016     License along with this library; if not, write to the Free
00017     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00018  
00019     Alexander Pipelka
00020     pipelka@teleweb.at
00021  
00022     Last Update:      $Author: pipelka $
00023     Update Date:      $Date: 2001/01/31 17:23:15 $
00024     Source File:      $Source: /usr/local/CVSROOT/linux/paragui/doc/html/parastretch_h-source.html,v $
00025     CVS/RCS Revision: $Revision: 1.34 $
00026     Status:           $State: Exp $
00027 */
00028 
00029 #ifndef PARASTRETCH_H
00030 #define PARASTRETCH_H
00031 
00032 #include "SDL.h"
00033 
00034 #define sign(x) ((x)>0 ? 1:-1)
00035 
00036 void CreateFilterLUT();
00037 void RectStretch(SDL_Surface* src_surface, int xs1, int ys1, int xs2, int ys2, SDL_Surface* dst_surface, int xd1, int yd1, int xd2, int yd2, Uint32* voiLUT);
00038 //void Stretch(SDL_Surface* src_surface, SDL_Surface* dst_surface, long x1,long x2,long y1,long y2,long yr,long yw);
00039 SDL_Surface* SDLCopyRect(SDL_Surface* s, int x, int y, int w, int h);
00040 void SDLSmoothFast(SDL_Surface* src, SDL_Surface* dst);
00041 void InterpolatePixel(SDL_Surface* src, SDL_Surface* dest);
00042 
00043 void SDL_FillRectEx(SDL_Surface *dst, Uint16 x0, Uint16 y0, Uint16 x1, Uint16 y1, Uint32 color);
00044 
00045 #ifndef M_PI
00046 #define M_PI      3.14159265358979323846
00047 #endif
00048 
00049 #endif // PARASTRETCH_H