124 lines
2.9 KiB
C
124 lines
2.9 KiB
C
/*
|
|
|
|
SDL_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 _SDL_rotozoom_h
|
|
#define _SDL_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 3.141592654
|
|
#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(LIBSDL_GFX_DLL_IMPORT)
|
|
# define SDL_ROTOZOOM_SCOPE __declspec(dllexport)
|
|
# else
|
|
# ifdef LIBSDL_GFX_DLL_IMPORT
|
|
# define SDL_ROTOZOOM_SCOPE __declspec(dllimport)
|
|
# endif
|
|
# endif
|
|
#endif
|
|
#ifndef SDL_ROTOZOOM_SCOPE
|
|
# define SDL_ROTOZOOM_SCOPE extern
|
|
#endif
|
|
|
|
/*
|
|
|
|
Rotozoom functions
|
|
|
|
*/
|
|
|
|
SDL_ROTOZOOM_SCOPE SDL_Surface *rotozoomSurface(SDL_Surface * src, double angle, double zoom, int smooth);
|
|
|
|
SDL_ROTOZOOM_SCOPE SDL_Surface *rotozoomSurfaceXY
|
|
(SDL_Surface * src, double angle, double zoomx, double zoomy, int smooth);
|
|
|
|
|
|
SDL_ROTOZOOM_SCOPE void rotozoomSurfaceSize(int width, int height, double angle, double zoom, int *dstwidth,
|
|
int *dstheight);
|
|
|
|
SDL_ROTOZOOM_SCOPE void rotozoomSurfaceSizeXY
|
|
(int width, int height, double angle, double zoomx, double zoomy,
|
|
int *dstwidth, int *dstheight);
|
|
|
|
/*
|
|
|
|
Zooming functions
|
|
|
|
*/
|
|
|
|
SDL_ROTOZOOM_SCOPE SDL_Surface *zoomSurface(SDL_Surface * src, double zoomx, double zoomy, int smooth);
|
|
|
|
SDL_ROTOZOOM_SCOPE void zoomSurfaceSize(int width, int height, double zoomx, double zoomy, int *dstwidth, int *dstheight);
|
|
|
|
/*
|
|
|
|
Shrinking functions
|
|
|
|
*/
|
|
|
|
SDL_ROTOZOOM_SCOPE SDL_Surface *shrinkSurface(SDL_Surface * src, int factorx, int factory);
|
|
|
|
/*
|
|
|
|
Specialized rotation functions
|
|
|
|
*/
|
|
|
|
SDL_ROTOZOOM_SCOPE SDL_Surface* rotateSurface90Degrees(SDL_Surface* src, int numClockwiseTurns);
|
|
|
|
/* Ends C function definitions when using C++ */
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* _SDL_rotozoom_h */
|