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/*
rotozoom.h - rotozoomer for 32bit or 8bit surfaces
LGPL (c) A. Schiffler
Note by sc2 developers:
Taken from SDL_gfx library and modified, original code can be downloaded
from http://www.ferzkopp.net/Software/SDL_gfx-2.0/
*/
#ifndef ROTOZOOM_H
#define ROTOZOOM_H
#include <math.h>
#ifndef M_PI
#define M_PI 3.141592654
#endif
#include "port.h"
#include SDL_INCLUDE(SDL.h)
/* ---- Defines */
#define SMOOTHING_OFF 0
#define SMOOTHING_ON 1
/* ---- Structures */
typedef struct tColorRGBA {
Uint8 r;
Uint8 g;
Uint8 b;
Uint8 a;
} tColorRGBA;
typedef struct tColorY {
Uint8 y;
} tColorY;
/* ---- Prototypes */
/*
zoomSurfaceRGBA()
Zoom the src surface into dst. The zoom amount is determined
by the dimensions of src and dst
*/
int zoomSurfaceRGBA(SDL_Surface * src, SDL_Surface * dst, int smooth);
/*
rotozoomSurface()
Rotates and zoomes a 32bit or 8bit 'src' surface to newly created 'dst' surface.
'angle' is the rotation in degrees. 'zoom' a scaling factor. If 'smooth' is 1
then the destination 32bit surface is anti-aliased. If the surface is not 8bit
or 32bit RGBA/ABGR it will be converted into a 32bit RGBA format on the fly.
*/
SDL_Surface *rotozoomSurface(SDL_Surface * src, double angle, double zoom,
int smooth);
int rotateSurface(SDL_Surface * src, SDL_Surface * dst, double angle,
int smooth);
/* Returns the size of the target surface for a rotozoomSurface() call */
void rotozoomSurfaceSize(int width, int height, double angle, double zoom,
int *dstwidth, int *dstheight);
/*
zoomSurface()
Zoomes a 32bit or 8bit 'src' surface to newly created 'dst' surface.
'zoomx' and 'zoomy' are scaling factors for width and height. If 'smooth' is 1
then the destination 32bit surface is anti-aliased. If the surface is not 8bit
or 32bit RGBA/ABGR it will be converted into a 32bit RGBA format on the fly.
*/
SDL_Surface *zoomSurface(SDL_Surface * src, double zoomx, double zoomy,
int smooth);
/* Returns the size of the target surface for a zoomSurface() call */
void zoomSurfaceSize(int width, int height, double zoomx, double zoomy,
int *dstwidth, int *dstheight);
#endif
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