git.r.bdr.sh / rbdr / pico-engine / blame
| Commit | Line | Data |
|---|---|---|
| 10a0e290 BB |
1 | |
| 2 | /* | |
| 3 | ||
| 4 | SDL_rotozoom - rotozoomer | |
| 5 | ||
| 6 | LGPL (c) A. Schiffler | |
| 7 | ||
| 8 | */ | |
| 9 | ||
| 10 | #ifndef _SDL_rotozoom_h | |
| 11 | #define _SDL_rotozoom_h | |
| 12 | ||
| 13 | #include <math.h> | |
| 14 | ||
| 15 | /* Set up for C function definitions, even when using C++ */ | |
| 16 | #ifdef __cplusplus | |
| 17 | extern "C" { | |
| 18 | #endif | |
| 19 | ||
| 20 | #ifndef M_PI | |
| 21 | #define M_PI 3.141592654 | |
| 22 | #endif | |
| 23 | ||
| 24 | #include "SDL.h" | |
| 25 | ||
| 26 | /* ---- Defines */ | |
| 27 | ||
| 28 | #define SMOOTHING_OFF 0 | |
| 29 | #define SMOOTHING_ON 1 | |
| 30 | ||
| 31 | /* ---- Structures */ | |
| 32 | ||
| 33 | typedef struct tColorRGBA { | |
| 34 | Uint8 r; | |
| 35 | Uint8 g; | |
| 36 | Uint8 b; | |
| 37 | Uint8 a; | |
| 38 | } tColorRGBA; | |
| 39 | ||
| 40 | typedef struct tColorY { | |
| 41 | Uint8 y; | |
| 42 | } tColorY; | |
| 43 | ||
| 44 | ||
| 45 | /* ---- Prototypes */ | |
| 46 | ||
| 47 | #ifdef WIN32 | |
| 48 | #ifdef BUILD_DLL | |
| 49 | #define DLLINTERFACE __declspec(dllexport) | |
| 50 | #else | |
| 51 | #define DLLINTERFACE __declspec(dllimport) | |
| 52 | #endif | |
| 53 | #else | |
| 54 | #define DLLINTERFACE | |
| 55 | #endif | |
| 56 | ||
| 57 | /* | |
| 58 | ||
| 59 | rotozoomSurface() | |
| 60 | ||
| 61 | Rotates and zoomes a 32bit or 8bit 'src' surface to newly created 'dst' surface. | |
| 62 | 'angle' is the rotation in degrees. 'zoom' a scaling factor. If 'smooth' is 1 | |
| 63 | then the destination 32bit surface is anti-aliased. If the surface is not 8bit | |
| 64 | or 32bit RGBA/ABGR it will be converted into a 32bit RGBA format on the fly. | |
| 65 | ||
| 66 | */ | |
| 67 | ||
| 68 | DLLINTERFACE SDL_Surface *rotozoomSurface(SDL_Surface * src, double angle, double zoom, int smooth); | |
| 69 | ||
| 70 | DLLINTERFACE SDL_Surface *rotozoomSurfaceXY | |
| 71 | (SDL_Surface * src, double angle, double zoomx, double zoomy, int smooth); | |
| 72 | ||
| 73 | /* Returns the size of the target surface for a rotozoomSurface() call */ | |
| 74 | ||
| 75 | DLLINTERFACE void rotozoomSurfaceSize(int width, int height, double angle, double zoom, int *dstwidth, | |
| 76 | int *dstheight); | |
| 77 | ||
| 78 | DLLINTERFACE void rotozoomSurfaceSizeXY | |
| 79 | (int width, int height, double angle, double zoomx, double zoomy, | |
| 80 | int *dstwidth, int *dstheight); | |
| 81 | ||
| 82 | /* | |
| 83 | ||
| 84 | zoomSurface() | |
| 85 | ||
| 86 | Zoomes a 32bit or 8bit 'src' surface to newly created 'dst' surface. | |
| 87 | 'zoomx' and 'zoomy' are scaling factors for width and height. If 'smooth' is 1 | |
| 88 | then the destination 32bit surface is anti-aliased. If the surface is not 8bit | |
| 89 | or 32bit RGBA/ABGR it will be converted into a 32bit RGBA format on the fly. | |
| 90 | ||
| 91 | */ | |
| 92 | ||
| 93 | DLLINTERFACE SDL_Surface *zoomSurface(SDL_Surface * src, double zoomx, double zoomy, int smooth); | |
| 94 | ||
| 95 | /* Returns the size of the target surface for a zoomSurface() call */ | |
| 96 | ||
| 97 | DLLINTERFACE void zoomSurfaceSize(int width, int height, double zoomx, double zoomy, int *dstwidth, int *dstheight); | |
| 98 | ||
| 99 | ||
| 100 | /* | |
| 101 | shrinkSurface() | |
| 102 | ||
| 103 | Shrinks a 32bit or 8bit 'src' surface ti a newly created 'dst' surface. | |
| 104 | 'factorx' and 'factory' are the shrinking ratios (i.e. 2=1/2 the size, | |
| 105 | 3=1/3 the size, etc.) The destination surface is antialiased by averaging | |
| 106 | the source box RGBA or Y information. If the surface is not 8bit | |
| 107 | or 32bit RGBA/ABGR it will be converted into a 32bit RGBA format on the fly. | |
| 108 | */ | |
| 109 | ||
| 110 | DLLINTERFACE SDL_Surface *shrinkSurface(SDL_Surface * src, int factorx, int factory); | |
| 111 | ||
| 112 | /* Ends C function definitions when using C++ */ | |
| 113 | #ifdef __cplusplus | |
| 114 | } | |
| 115 | #endif | |
| 116 | ||
| 117 | #endif /* _SDL_rotozoom_h */ |