/* 
*     XaoS, a fast portable realtime fractal zoomer
*                  Copyright (C) 1996,1997 by
*
*      Jan Hubicka          (hubicka@paru.cas.cz)
*      Thomas Marsh         (tmarsh@austin.ibm.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef FRACTAL1_H
#define FRACTAL1_H

#ifdef __cplusplus
extern "C"
{
#endif

#include "config.h"
#include "fconfig.h"
#define INCOLORING 11
#define OUTCOLORING 11
#define TCOLOR 15

    typedef struct
    {
        number_t y0, k;
    } symmetrytype;

    struct symmetryinfo
    {
        number_t xsym, ysym;
        int nsymmetries;
        const symmetrytype *symmetry;
    };
    typedef struct
    {
        number_t mc, nc;
        number_t mi, ni;
    } vrect;
    typedef struct
    {
        number_t cr, ci;
        number_t rr, ri;
    } vinfo;
    typedef unsigned int (*iterationfunc) (number_t, number_t, number_t, number_t) CONSTF REGISTERS (3);
    struct formula
    {
        int magic;
#ifndef SLOWFUNCPTR
        iterationfunc calculate, calculate_periodicity, smooth_calculate, smooth_calculate_periodicity;
#endif
        void (*calculate_julia) (struct image * img, register number_t pre, register number_t pim);
        const char *name[2];
        const char *shortname;
        vinfo v;
        int hasperiodicity;
        int mandelbrot;
        number_t pre, pim;
        struct symmetryinfo (out[OUTCOLORING + 1]);
        struct symmetryinfo (in[INCOLORING + 1]);
        int flags;
    };

    struct fractal_context
    {
        number_t pre, pim;
        number_t bre, bim;
        const struct formula *currentformula;
        number_t angle;
        int periodicity;
        unsigned int maxiter;
        number_t bailout;
        int coloringmode, incoloringmode;
        int intcolor, outtcolor;
        int mandelbrot;
        int plane;
        int version;
        int range;
        float windowwidth, windowheight;
        vinfo s;
        vrect rs;
        number_t sin, cos;
        int slowmode;           /* 1 in case we want to be exact, not fast */
        /*values temporary filled by set_fractal_context */
        iterationfunc calculate[2];
        number_t periodicity_limit;
        struct palette *palette;        /*fractal's palette */
    };
    typedef struct fractal_context fractal_context;
    typedef struct
    {
        double y0, k, kk, y0k;
    } symmetry2;

    struct symmetryinfo2
    {
        number_t xsym, ysym;
        int nsymmetries;
        symmetry2 *symmetry;
        number_t xmul, ymul, xdist, ydist;
    };
#define STARTZERO 1
#define JULIA_BTRACE 2
#define MANDEL_BTRACE 4

#ifdef SFFE_USING
#define SFFE_FRACTAL 8
#endif

#define BTRACEOK ((cformula.flags&(2<<cfractalc.mandelbrot))&&!cfractalc.incoloringmode&&cfractalc.coloringmode!=7)
#define rotate(f,x,y) { \
number_t tmp; \
        tmp=(x)*(f).cos-(y)*(f).sin; \
            y=(x)*(f).sin+(y)*(f).cos; \
              x=tmp; \
            }
#define rotateback(f,x,y) { \
number_t tmp; \
    tmp=(x)*(f).cos+(y)*(f).sin; \
        y=-(x)*(f).sin+(y)*(f).cos; \
          x=tmp; \
        }

    extern struct symmetryinfo2 cursymmetry;
    extern struct fractal_context cfractalc;
    extern struct formula cformula;
    extern struct palette cpalette;
    extern struct image cimage;

#ifdef STATISTICS
/*This is an statistics variables printed from various parts
*of XaoS.
*/
    extern int nadded2, nsymmetry2, nskipped2;
    extern int tocalculate2, avoided2, frames2;
    extern int ncalculated2, ninside2;
    extern int niter2, niter1;
    extern int nperi;


    extern int iters2, guessed2, unguessed2, total2;

#endif

    void set_formula (fractal_context *, int);
    void set_fractalc (fractal_context *, struct image *img);
    void fractalc_resize_to (fractal_context *, float, float);
    void update_view (fractal_context *);
    void free_fractalc (fractal_context *);
    fractal_context *make_fractalc (const int, float, float);
    void speed_test (fractal_context *, struct image *img);
    unsigned int calculateswitch (register number_t x1, register number_t y1, register number_t x2, register number_t y2, int periodicity) REGISTERS (3);

/* needs struct formula */
#include <formulas.h>

#ifdef __cplusplus
}
#endif
#endif                          /* FRACTAL_H */
