/*
 * types.h
 *
 * Copyright 2015 Edward V. Emelianov <eddy@sao.ru, edward.emelianoff@gmail.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., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 */
#pragma once
#ifndef __TYPES_H__
#define __TYPES_H__
#include "fits.h"

#ifndef THREAD_NUMBER
    #define THREAD_NUMBER 4     // default - 4 threads
#endif

#ifndef DBL_EPSILON
#define DBL_EPSILON    (2.2204460492503131e-16)
#endif
#ifndef DBL_MAX
#define DBL_MAX        (1.7976931348623157e+308)
#endif

// ITM_EPSILON is for data comparing, set it to zero for integer types
#define ITM_EPSILON  DBL_EPSILON

#define OMP_NUM_THREADS THREAD_NUMBER
#define Stringify(x) #x
#define OMP_FOR(x) _Pragma(Stringify(omp parallel for x))
#ifndef MAX
#define MAX(x,y) ((x) > (y) ? (x) : (y))
#endif
#ifndef MIN
#define MIN(x,y) ((x) < (y) ? (x) : (y))
#endif

// FilterType (not only convolution!)
typedef enum{
    FILTER_NONE = 0     // simple start
    ,MEDIAN             // median filter
    ,ADPT_MEDIAN        // simple adaptive median
    ,LAPGAUSS           // laplasian of gaussian
    ,GAUSS              // gaussian
    ,SOBELH             // Sobel horizontal
    ,SOBELV             // -//- vertical
    ,SIMPLEGRAD         // simple gradient (by Sobel)
    ,PREWITTH           // Prewitt (horizontal) - simple derivative
    ,PREWITTV           // -//- (vertical)
    ,SCHARRH            // Scharr (modified Sobel)
    ,SCHARRV
    ,STEP               // "posterisation"
} FType;

typedef struct{
    Item *data;
    size_t size;
}Itmarray;

typedef struct _Filter{
    char *name;         // filter name
    FType FilterType;   // filter type
    int w;              // filter width
    int h;              // height
    double sx;          // x half-width
    double sy;          // y half-width (sx, sy - for Gaussian-type filters)
    IMAGE* (*imfunc)(IMAGE *in, struct _Filter *f, Itmarray *i);    // image function for given conversion type
} Filter;

// mathematical operations when there's no '-i' parameter (for >1 FITS-files)
typedef enum{
    MATH_NONE = 0
    ,MATH_SUM           // make sum of all files
    ,MATH_MEDIAN        // calculate median by all files
    ,MATH_MEAN          // calculate mean for all files
    ,MATH_DIFF          // difference of first and rest files
} MathOper;

// pointer to image conversion function
typedef IMAGE* (*imfuncptr)(IMAGE *in, Filter *f, Itmarray *i);

#endif // __TYPES_H__