4 SDL_rotozoom - rotozoomer
10 #ifndef _SDL_rotozoom_h
11 #define _SDL_rotozoom_h
15 /* Set up for C function definitions, even when using C++ */
21 #define M_PI 3.141592654
28 #define SMOOTHING_OFF 0
29 #define SMOOTHING_ON 1
33 typedef struct tColorRGBA
{
40 typedef struct tColorY
{
51 Rotates and zoomes a 32bit or 8bit 'src' surface to newly created 'dst' surface.
52 'angle' is the rotation in degrees. 'zoom' a scaling factor. If 'smooth' is 1
53 then the destination 32bit surface is anti-aliased. If the surface is not 8bit
54 or 32bit RGBA/ABGR it will be converted into a 32bit RGBA format on the fly.
58 SDL_Surface
*rotozoomSurface(SDL_Surface
* src
, double angle
, double zoom
, int smooth
);
60 SDL_Surface
*rotozoomSurfaceXY
61 (SDL_Surface
* src
, double angle
, double zoomx
, double zoomy
, int smooth
);
63 /* Returns the size of the target surface for a rotozoomSurface() call */
65 void rotozoomSurfaceSize(int width
, int height
, double angle
, double zoom
, int *dstwidth
,
68 void rotozoomSurfaceSizeXY
69 (int width
, int height
, double angle
, double zoomx
, double zoomy
,
70 int *dstwidth
, int *dstheight
);
76 Zoomes a 32bit or 8bit 'src' surface to newly created 'dst' surface.
77 'zoomx' and 'zoomy' are scaling factors for width and height. If 'smooth' is 1
78 then the destination 32bit surface is anti-aliased. If the surface is not 8bit
79 or 32bit RGBA/ABGR it will be converted into a 32bit RGBA format on the fly.
83 SDL_Surface
*zoomSurface(SDL_Surface
* src
, double zoomx
, double zoomy
, int smooth
);
85 /* Returns the size of the target surface for a zoomSurface() call */
87 void zoomSurfaceSize(int width
, int height
, double zoomx
, double zoomy
, int *dstwidth
, int *dstheight
);
93 Shrinks a 32bit or 8bit 'src' surface ti a newly created 'dst' surface.
94 'factorx' and 'factory' are the shrinking ratios (i.e. 2=1/2 the size,
95 3=1/3 the size, etc.) The destination surface is antialiased by averaging
96 the source box RGBA or Y information. If the surface is not 8bit
97 or 32bit RGBA/ABGR it will be converted into a 32bit RGBA format on the fly.
100 SDL_Surface
*shrinkSurface(SDL_Surface
* src
, int factorx
, int factory
);
108 SDL_Surface
* rotateSurface90Degrees(SDL_Surface
* pSurf
, int numClockwiseTurns
);
110 /* Ends C function definitions when using C++ */
115 #endif /* _SDL_rotozoom_h */