/*
 *	floatimg.h
 */

#define		FIMG_VERSION	85

/*
 *	in memory descriptor
 */
typedef struct {
	int		width;
	int		height;
	int		type;
	float		fval;
	int		count;

	float		*R, *G, *B, *A;

	int		reserved;
	} FloatImg;

/*
 *	fimg file header
 */
typedef struct {
	char		magic[8];
	int		w, h, t;
	} FimgFileHead;


#define FIMG_TYPE_GRAY			1
#define FIMG_TYPE_RGB			3
#define FIMG_TYPE_RGBA			4

#define FILE_TYPE_FIMG			1
#define FILE_TYPE_PNM			2
#define FILE_TYPE_PNG			3
#define FILE_TYPE_TGA			4
#define FILE_TYPE_TIFF			5

/*	lib/contrast.c			*/
#define CONTRAST_NONE			0
#define CONTRAST_SQRT			1
#define CONTRAST_POW2			2
#define CONTRAST_COS01			3
#define CONTRAST_COS010			4

/*
 *	core module
 */
int   fimg_create(FloatImg *fimg, int w, int h, int t);
int   fimg_destroy(FloatImg *fimg);
int   fimg_clone(FloatImg *fimg, FloatImg *newpic, int flags);
int fimg_copy_data(FloatImg *from, FloatImg *to);

int   fimg_print_version(int k);
void  fimg_printhead(FloatImg *h);
int   fimg_describe(FloatImg *head, char *txt);
char *fimg_str_type(int type);
int   fimg_fileinfo(char *fname, int *datas);
int   fimg_plot_rgb (FloatImg *head, int x, int y, float r, float g, float b);
int   fimg_clear(FloatImg *fimg);
int   fimg_add_rgb(FloatImg *head, int x, int y, float r, float g, float b);
int   fimg_rgb_constant(FloatImg *head, float r, float g, float b);

/*	--> lib/fimg-compare.c		*/
int fimg_images_compatible(FloatImg *a, FloatImg *b);

int fimg_interpolate(FloatImg *s1, FloatImg *s2, FloatImg *d, float coef);

/*	'operats' module 		*/
int fimg_add(FloatImg *a, FloatImg *b, FloatImg *d);
int fimg_sub(FloatImg *a, FloatImg *b, FloatImg *d);
int fimg_mul(FloatImg *a, FloatImg *b, FloatImg *d);
int fimg_minimum(FloatImg *a, FloatImg *b, FloatImg *d);
int fimg_maximum(FloatImg *a, FloatImg *b, FloatImg *d);

/*	PNM files module		*/
int fimg_save_as_pnm(FloatImg *head, char *fname, int flags);
int fimg_load_from_pnm(char *fname, FloatImg *head, int notused);

double fimg_timer_set(int whot);
double fimg_timer_get(int whot);

/*	--> lib/contrast.c		*/
int fimg_id_contraste(char *name);
int fimg_square_root(FloatImg *s, FloatImg *d, double maxval);
int fimg_power_2(FloatImg *s, FloatImg *d, double maxval);
int fimg_cos_01(FloatImg *s, FloatImg *d, double maxval);
int fimg_cos_010(FloatImg *s, FloatImg *d, double maxval);

int fimg_mk_gray_from(FloatImg *src, FloatImg*dst, int k);

/*	module funcs/rampes.c		*/
int fimg_hdeg_a(FloatImg *img, double dcoef);
int fimg_vdeg_a(FloatImg *img, double dcoef);

/*	FIMG files module		*/
int   fimg_fileinfos(char *fname, int *datas);
int   fimg_dump_to_file(FloatImg *head, char *fname, int notused);
int   fimg_load_from_dump(char *fname, FloatImg *where);
int   fimg_create_from_dump(char *fname, FloatImg *head);

/*	mathematics operations */
float fimg_get_maxvalue(FloatImg *head);
int   fimg_meanvalues(FloatImg *head, float means[4]);
int   fimg_to_gray(FloatImg *head);
void  fimg_add_cste(FloatImg *fi, float value);
void  fimg_mul_cste(FloatImg *fi, float value);
void  fimg_drand48(FloatImg *fi, float kmul);
int   fimg_count_negativ(FloatImg *fi);

/*	various funcs modules		*/
int   fimg_load_from_png(char *filename, FloatImg *fimg);
int   fimg_create_from_png(char *filename, FloatImg *fimg);
int   fimg_save_as_png(FloatImg *src, char *outname, int flags);

int   fimg_draw_something(FloatImg *fimg);

int parse_WxH(char *str, int *pw, int *ph);
int parse_double(char *str, double *dptr);
int format_from_extension(char *fname);