/* SDL_rotozoom - rotozoomer LGPL (c) A. Schiffler*/#ifndef _SDL_rotozoom_h#define _SDL_rotozoom_h#include <math.h>/* Set up for C function definitions, even when using C++ */#ifdef __cplusplusextern "C" {#endif#ifndef M_PI#define M_PI	3.141592654#endif#include <SDL/SDL.h>/* ---- Defines */#define SMOOTHING_OFF		0#define SMOOTHING_ON		1/* ---- Structures */    typedef struct tColorRGBA {	Uint8 r;	Uint8 g;	Uint8 b;	Uint8 a;    } tColorRGBA;    typedef struct tColorY {	Uint8 y;    } tColorY;/* ---- Prototypes */#ifdef WIN32#ifdef BUILD_DLL#define DLLINTERFACE __declspec(dllexport)#else#define DLLINTERFACE __declspec(dllimport)#endif#else#define DLLINTERFACE#endif/*   rotozoomSurface() Rotates and zoomes a 32bit or 8bit 'src' surface to newly created 'dst' surface. 'angle' is the rotation in degrees. 'zoom' a scaling factor. If 'smooth' is 1 then the destination 32bit surface is anti-aliased. If the surface is not 8bit or 32bit RGBA/ABGR it will be converted into a 32bit RGBA format on the fly.*/    DLLINTERFACE SDL_Surface *rotozoomSurface(SDL_Surface * src, double angle, double zoom, int smooth);/* Returns the size of the target surface for a rotozoomSurface() call */    DLLINTERFACE void rotozoomSurfaceSize(int width, int height, double angle, double zoom, int *dstwidth,					  int *dstheight);/*   zoomSurface() Zoomes a 32bit or 8bit 'src' surface to newly created 'dst' surface. 'zoomx' and 'zoomy' are scaling factors for width and height. If 'smooth' is 1 then the destination 32bit surface is anti-aliased. If the surface is not 8bit or 32bit RGBA/ABGR it will be converted into a 32bit RGBA format on the fly.*/    DLLINTERFACE SDL_Surface *zoomSurface(SDL_Surface * src, double zoomx, double zoomy, int smooth);/* Returns the size of the target surface for a zoomSurface() call */    DLLINTERFACE void zoomSurfaceSize(int width, int height, double zoomx, double zoomy, int *dstwidth, int *dstheight);/* Ends C function definitions when using C++ */#ifdef __cplusplus};#endif#endif				/* _SDL_rotozoom_h */