104 lines
2 KiB
C
104 lines
2 KiB
C
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/*
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SDL_rotozoom - rotozoomer
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LGPL (c) A. Schiffler
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*/
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#ifndef _SDL_rotozoom_h
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#define _SDL_rotozoom_h
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#include <math.h>
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/* Set up for C function definitions, even when using C++ */
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef M_PI
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#define M_PI 3.141592654
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#endif
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#include "SDL.h"
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/* ---- Defines */
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/*!
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\brief Disable anti-aliasing (no smoothing).
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*/
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#define SMOOTHING_OFF 0
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/*!
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\brief Enable anti-aliasing (smoothing).
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*/
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#define SMOOTHING_ON 1
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/* ---- Function Prototypes */
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#if defined(WIN32) || defined(WIN64)
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# if defined(DLL_EXPORT) && !defined(LIBSDL_GFX_DLL_IMPORT)
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# define SDL_ROTOZOOM_SCOPE __declspec(dllexport)
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# else
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# ifdef LIBSDL_GFX_DLL_IMPORT
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# define SDL_ROTOZOOM_SCOPE __declspec(dllimport)
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# endif
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# endif
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#endif
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#ifndef SDL_ROTOZOOM_SCOPE
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# define SDL_ROTOZOOM_SCOPE extern
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#endif
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/*
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Rotozoom functions
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*/
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SDL_ROTOZOOM_SCOPE SDL_Surface *rotozoomSurface(SDL_Surface * src, double angle, double zoom, int smooth);
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SDL_ROTOZOOM_SCOPE SDL_Surface *rotozoomSurfaceXY
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(SDL_Surface * src, double angle, double zoomx, double zoomy, int smooth);
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SDL_ROTOZOOM_SCOPE void rotozoomSurfaceSize(int width, int height, double angle, double zoom, int *dstwidth,
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int *dstheight);
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SDL_ROTOZOOM_SCOPE void rotozoomSurfaceSizeXY
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(int width, int height, double angle, double zoomx, double zoomy,
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int *dstwidth, int *dstheight);
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/*
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Zooming functions
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*/
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SDL_ROTOZOOM_SCOPE SDL_Surface *zoomSurface(SDL_Surface * src, double zoomx, double zoomy, int smooth);
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SDL_ROTOZOOM_SCOPE void zoomSurfaceSize(int width, int height, double zoomx, double zoomy, int *dstwidth, int *dstheight);
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/*
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Shrinking functions
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*/
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SDL_ROTOZOOM_SCOPE SDL_Surface *shrinkSurface(SDL_Surface * src, int factorx, int factory);
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/*
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Specialized rotation functions
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*/
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SDL_ROTOZOOM_SCOPE SDL_Surface* rotateSurface90Degrees(SDL_Surface* src, int numClockwiseTurns);
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/* Ends C function definitions when using C++ */
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SDL_rotozoom_h */
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