1 #include <SDL.h> 2 #if SDL_VERSION_ATLEAST(2,0,0) 3 #include "SDL2_rotozoom.h" 4 #else 5 /* 6 7 SDL_rotozoom.c: rotozoomer, zoomer and shrinker for 32bit or 8bit surfaces 8 9 Copyright (C) 2001-2012 Andreas Schiffler 10 11 This software is provided 'as-is', without any express or implied 12 warranty. In no event will the authors be held liable for any damages 13 arising from the use of this software. 14 15 Permission is granted to anyone to use this software for any purpose, 16 including commercial applications, and to alter it and redistribute it 17 freely, subject to the following restrictions: 18 19 1. The origin of this software must not be misrepresented; you must not 20 claim that you wrote the original software. If you use this software 21 in a product, an acknowledgment in the product documentation would be 22 appreciated but is not required. 23 24 2. Altered source versions must be plainly marked as such, and must not be 25 misrepresented as being the original software. 26 27 3. This notice may not be removed or altered from any source 28 distribution. 29 30 Andreas Schiffler -- aschiffler at ferzkopp dot net 31 32 */ 33 34 #ifndef _SDL_rotozoom_h 35 #define _SDL_rotozoom_h 36 37 #include <math.h> 38 39 /* Set up for C function definitions, even when using C++ */ 40 #ifdef __cplusplus 41 extern "C" { 42 #endif 43 44 #ifndef M_PI 45 #define M_PI 3.141592654 46 #endif 47 48 #include "SDL.h" 49 50 /* ---- Defines */ 51 52 /*! 53 \brief Disable anti-aliasing (no smoothing). 54 */ 55 #define SMOOTHING_OFF 0 56 57 /*! 58 \brief Enable anti-aliasing (smoothing). 59 */ 60 #define SMOOTHING_ON 1 61 62 /* ---- Function Prototypes */ 63 64 #ifdef _MSC_VER 65 # if defined(DLL_EXPORT) && !defined(LIBSDL_GFX_DLL_IMPORT) 66 # define SDL_ROTOZOOM_SCOPE __declspec(dllexport) 67 # else 68 # ifdef LIBSDL_GFX_DLL_IMPORT 69 # define SDL_ROTOZOOM_SCOPE __declspec(dllimport) 70 # endif 71 # endif 72 #endif 73 #ifndef SDL_ROTOZOOM_SCOPE 74 # define SDL_ROTOZOOM_SCOPE extern 75 #endif 76 77 /* 78 79 Rotozoom functions 80 81 */ 82 83 SDL_ROTOZOOM_SCOPE SDL_Surface *rotozoomSurface(SDL_Surface * src, double angle, double zoom, int smooth); 84 85 SDL_ROTOZOOM_SCOPE SDL_Surface *rotozoomSurfaceXY 86 (SDL_Surface * src, double angle, double zoomx, double zoomy, int smooth); 87 88 89 SDL_ROTOZOOM_SCOPE void rotozoomSurfaceSize(int width, int height, double angle, double zoom, int *dstwidth, 90 int *dstheight); 91 92 SDL_ROTOZOOM_SCOPE void rotozoomSurfaceSizeXY 93 (int width, int height, double angle, double zoomx, double zoomy, 94 int *dstwidth, int *dstheight); 95 96 /* 97 98 Zooming functions 99 100 */ 101 102 SDL_ROTOZOOM_SCOPE SDL_Surface *zoomSurface(SDL_Surface * src, double zoomx, double zoomy, int smooth); 103 104 SDL_ROTOZOOM_SCOPE void zoomSurfaceSize(int width, int height, double zoomx, double zoomy, int *dstwidth, int *dstheight); 105 106 /* 107 108 Shrinking functions 109 110 */ 111 112 SDL_ROTOZOOM_SCOPE SDL_Surface *shrinkSurface(SDL_Surface * src, int factorx, int factory); 113 114 /* 115 116 Specialized rotation functions 117 118 */ 119 120 SDL_ROTOZOOM_SCOPE SDL_Surface* rotateSurface90Degrees(SDL_Surface* src, int numClockwiseTurns); 121 122 /* Ends C function definitions when using C++ */ 123 #ifdef __cplusplus 124 } 125 #endif 126 127 #endif /* _SDL_rotozoom_h */ 128 #endif 129