1 files changed, 123 insertions, 0 deletions
diff --git a/src/sdl2gfx/SDL_rotozoom.h b/src/sdl2gfx/SDL_rotozoom.h
new file mode 100644
index 000000000..f4c236ba4
--- /dev/null
+++ b/src/sdl2gfx/SDL_rotozoom.h
@@ -0,0 +1,123 @@
+/*  
+
+SDL2_rotozoom.c: rotozoomer, zoomer and shrinker for 32bit or 8bit surfaces
+
+Copyright (C) 2001-2012  Andreas Schiffler
+
+This software is provided 'as-is', without any express or implied
+warranty. In no event will the authors be held liable for any damages
+arising from the use of this software.
+
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it
+freely, subject to the following restrictions:
+
+1. The origin of this software must not be misrepresented; you must not
+claim that you wrote the original software. If you use this software
+in a product, an acknowledgment in the product documentation would be
+appreciated but is not required.
+
+2. Altered source versions must be plainly marked as such, and must not be
+misrepresented as being the original software.
+
+3. This notice may not be removed or altered from any source
+distribution.
+
+Andreas Schiffler -- aschiffler at ferzkopp dot net
+
+*/
+
+#ifndef _SDL2_rotozoom_h
+#define _SDL2_rotozoom_h
+
+#include <math.h>
+
+/* Set up for C function definitions, even when using C++ */
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef M_PI
+#define M_PI	3.1415926535897932384626433832795
+#endif
+
+#include "SDL.h"
+
+	/* ---- Defines */
+
+	/*!
+	\brief Disable anti-aliasing (no smoothing).
+	*/
+#define SMOOTHING_OFF		0
+
+	/*!
+	\brief Enable anti-aliasing (smoothing).
+	*/
+#define SMOOTHING_ON		1
+
+	/* ---- Function Prototypes */
+
+#ifdef _MSC_VER
+#  if defined(DLL_EXPORT) && !defined(LIBSDL2_GFX_DLL_IMPORT)
+#    define SDL2_ROTOZOOM_SCOPE __declspec(dllexport)
+#  else
+#    ifdef LIBSDL2_GFX_DLL_IMPORT
+#      define SDL2_ROTOZOOM_SCOPE __declspec(dllimport)
+#    endif
+#  endif
+#endif
+#ifndef SDL2_ROTOZOOM_SCOPE
+#  define SDL2_ROTOZOOM_SCOPE extern
+#endif
+
+	/* 
+
+	Rotozoom functions
+
+	*/
+
+	SDL2_ROTOZOOM_SCOPE SDL_Surface *rotozoomSurface(SDL_Surface * src, double angle, double zoom, int smooth);
+
+	SDL2_ROTOZOOM_SCOPE SDL_Surface *rotozoomSurfaceXY
+		(SDL_Surface * src, double angle, double zoomx, double zoomy, int smooth);
+
+
+	SDL2_ROTOZOOM_SCOPE void rotozoomSurfaceSize(int width, int height, double angle, double zoom, int *dstwidth,
+		int *dstheight);
+
+	SDL2_ROTOZOOM_SCOPE void rotozoomSurfaceSizeXY
+		(int width, int height, double angle, double zoomx, double zoomy, 
+		int *dstwidth, int *dstheight);
+
+	/* 
+
+	Zooming functions
+
+	*/
+
+	SDL2_ROTOZOOM_SCOPE SDL_Surface *zoomSurface(SDL_Surface * src, double zoomx, double zoomy, int smooth);
+
+	SDL2_ROTOZOOM_SCOPE void zoomSurfaceSize(int width, int height, double zoomx, double zoomy, int *dstwidth, int *dstheight);
+
+	/* 
+
+	Shrinking functions
+
+	*/     
+
+	SDL2_ROTOZOOM_SCOPE SDL_Surface *shrinkSurface(SDL_Surface * src, int factorx, int factory);
+
+	/* 
+
+	Specialized rotation functions
+
+	*/
+
+	SDL2_ROTOZOOM_SCOPE SDL_Surface* rotateSurface90Degrees(SDL_Surface* src, int numClockwiseTurns);
+
+	/* Ends C function definitions when using C++ */
+#ifdef __cplusplus
+}
+#endif
+
+#endif				/* _SDL2_rotozoom_h */