30 #ifndef _SDL2_rotozoom_h 
   31 #define _SDL2_rotozoom_h 
   41 #define M_PI    3.1415926535897932384626433832795 
   51 #define SMOOTHING_OFF           0 
   56 #define SMOOTHING_ON            1 
   61 #  if defined(DLL_EXPORT) && !defined(LIBSDL2_GFX_DLL_IMPORT) 
   62 #    define SDL2_ROTOZOOM_SCOPE __declspec(dllexport) 
   64 #    ifdef LIBSDL2_GFX_DLL_IMPORT 
   65 #      define SDL2_ROTOZOOM_SCOPE __declspec(dllimport) 
   69 #ifndef SDL2_ROTOZOOM_SCOPE 
   70 #  define SDL2_ROTOZOOM_SCOPE extern 
   82                 (SDL_Surface * src, 
double angle, 
double zoomx, 
double zoomy, 
int smooth);
 
   89                 (
int width, 
int height, 
double angle, 
double zoomx, 
double zoomy, 
 
   90                 int *dstwidth, 
int *dstheight);
 
SDL2_ROTOZOOM_SCOPE SDL_Surface * rotateSurface90Degrees(SDL_Surface *src, int numClockwiseTurns)
Rotates a 8/16/24/32 bit surface in increments of 90 degrees. 
SDL2_ROTOZOOM_SCOPE SDL_Surface * rotozoomSurfaceXY(SDL_Surface *src, double angle, double zoomx, double zoomy, int smooth)
Rotates and zooms a surface with different horizontal and vertival scaling factors and optional anti-...
#define SDL2_ROTOZOOM_SCOPE
SDL2_ROTOZOOM_SCOPE SDL_Surface * rotozoomSurface(SDL_Surface *src, double angle, double zoom, int smooth)
Rotates and zooms a surface and optional anti-aliasing. 
SDL2_ROTOZOOM_SCOPE SDL_Surface * shrinkSurface(SDL_Surface *src, int factorx, int factory)
Shrink a surface by an integer ratio using averaging. 
SDL2_ROTOZOOM_SCOPE void rotozoomSurfaceSize(int width, int height, double angle, double zoom, int *dstwidth, int *dstheight)
Returns the size of the resulting target surface for a rotozoomSurface() call. 
SDL2_ROTOZOOM_SCOPE void rotozoomSurfaceSizeXY(int width, int height, double angle, double zoomx, double zoomy, int *dstwidth, int *dstheight)
Returns the size of the resulting target surface for a rotozoomSurfaceXY() call. 
SDL2_ROTOZOOM_SCOPE SDL_Surface * zoomSurface(SDL_Surface *src, double zoomx, double zoomy, int smooth)
Zoom a surface by independent horizontal and vertical factors with optional smoothing. 
SDL2_ROTOZOOM_SCOPE void zoomSurfaceSize(int width, int height, double zoomx, double zoomy, int *dstwidth, int *dstheight)
Calculates the size of the target surface for a zoomSurface() call.