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/* RCSid $Id: rmatrix.h,v 2.11 2019/09/03 23:43:07 greg Exp $ */
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/*
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* Header file for general matrix routines.
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*/
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#ifndef _RAD_RMATRIX_H_
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#define _RAD_RMATRIX_H_
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#include "cmatrix.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* General plane-ordered component matrix */
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typedef struct {
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int nrows, ncols;
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short ncomp;
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uby8 dtype;
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uby8 swapin;
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char *info;
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double mtx[3]; /* extends struct */
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} RMATRIX;
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#define rmx_lval(rm,r,c,i) (rm)->mtx[(i)+(rm)->ncomp*((c)+(size_t)(rm)->ncols*(r))]
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/* Allocate a nr x nc matrix with n components */
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extern RMATRIX *rmx_alloc(int nr, int nc, int n);
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/* Free a RMATRIX array */
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extern void rmx_free(RMATRIX *rm);
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/* Resolve data type based on two input types (returns 0 for mismatch) */
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extern int rmx_newtype(int dtyp1, int dtyp2);
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/* Load matrix from supported file type (NULL for stdin, '!' with command) */
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extern RMATRIX *rmx_load(const char *inspec);
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/* Append header information associated with matrix data */
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extern int rmx_addinfo(RMATRIX *rm, const char *info);
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/* Write matrix to file type indicated by dtype */
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extern int rmx_write(const RMATRIX *rm, int dtype, FILE *fp);
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/* Allocate and assign square identity matrix with n components */
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extern RMATRIX *rmx_identity(int dim, int n);
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/* Duplicate the given matrix */
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extern RMATRIX *rmx_copy(const RMATRIX *rm);
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/* Allocate and assign transposed matrix */
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extern RMATRIX *rmx_transpose(const RMATRIX *rm);
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/* Multiply (concatenate) two matrices and allocate the result */
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extern RMATRIX *rmx_multiply(const RMATRIX *m1, const RMATRIX *m2);
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/* Element-wise multiplication (or division) of m2 into m1 */
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extern int rmx_elemult(RMATRIX *m1, const RMATRIX *m2, int divide);
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/* Sum second matrix into first, applying scale factor beforehand */
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extern int rmx_sum(RMATRIX *msum, const RMATRIX *madd, const double sf[]);
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/* Scale the given matrix by the indicated scalar component vector */
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extern int rmx_scale(RMATRIX *rm, const double sf[]);
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/* Allocate new matrix and apply component transformation */
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extern RMATRIX *rmx_transform(const RMATRIX *msrc, int n, const double cmat[]);
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/* Convert a color matrix to newly allocated RMATRIX buffer */
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extern RMATRIX *rmx_from_cmatrix(const CMATRIX *cm);
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/* Convert general matrix to newly allocated CMATRIX buffer */
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extern CMATRIX *cm_from_rmatrix(const RMATRIX *rm);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _RAD_RMATRIX_H_ */
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