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SDL2_rotozoom.c: rotozoomer, zoomer and shrinker for 32bit or 8bit surfaces
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Copyright (C) 2001-2012 Andreas Schiffler
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source
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Andreas Schiffler -- aschiffler at ferzkopp dot net
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#ifndef _SDL2_rotozoom_h
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#define _SDL2_rotozoom_h
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/* Set up for C function definitions, even when using C++ */
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#define M_PI 3.1415926535897932384626433832795
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\brief Disable anti-aliasing (no smoothing).
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#define SMOOTHING_OFF 0
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\brief Enable anti-aliasing (smoothing).
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#define SMOOTHING_ON 1
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/* ---- Function Prototypes */
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# if defined(DLL_EXPORT) && !defined(LIBSDL2_GFX_DLL_IMPORT)
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# define SDL2_ROTOZOOM_SCOPE __declspec(dllexport)
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# ifdef LIBSDL2_GFX_DLL_IMPORT
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# define SDL2_ROTOZOOM_SCOPE __declspec(dllimport)
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#ifndef SDL2_ROTOZOOM_SCOPE
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# define SDL2_ROTOZOOM_SCOPE extern
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SDL2_ROTOZOOM_SCOPE SDL_Surface *rotozoomSurface(SDL_Surface * src, double angle, double zoom, int smooth);
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SDL2_ROTOZOOM_SCOPE SDL_Surface *rotozoomSurfaceXY
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(SDL_Surface * src, double angle, double zoomx, double zoomy, int smooth);
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SDL2_ROTOZOOM_SCOPE void rotozoomSurfaceSize(int width, int height, double angle, double zoom, int *dstwidth,
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SDL2_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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SDL2_ROTOZOOM_SCOPE SDL_Surface *zoomSurface(SDL_Surface * src, double zoomx, double zoomy, int smooth);
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SDL2_ROTOZOOM_SCOPE void zoomSurfaceSize(int width, int height, double zoomx, double zoomy, int *dstwidth, int *dstheight);
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SDL2_ROTOZOOM_SCOPE SDL_Surface *shrinkSurface(SDL_Surface * src, int factorx, int factory);
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Specialized rotation functions
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SDL2_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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#endif /* _SDL2_rotozoom_h */
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src/sdl2gfx/SDL_rotozoom.h
