--- ray/src/util/rmatrix.h	2014/08/02 17:10:43	2.4
+++ ray/src/util/rmatrix.h	2025/04/18 23:59:03	2.27
@@ -1,4 +1,4 @@
-/* RCSid $Id: rmatrix.h,v 2.4 2014/08/02 17:10:43 greg Exp $ */
+/* RCSid $Id: rmatrix.h,v 2.27 2025/04/18 23:59:03 greg Exp $ */
 /*
  * Header file for general matrix routines.
  */
@@ -12,45 +12,103 @@
 extern "C" {
 #endif
 
-/* General plane-ordered component matrix */
+/* RMATRIX flags (usually private):
+	need to swap input, we should free memory */
+#define	RMF_SWAPIN	1
+#define RMF_FREEMEM	2
+
+#ifndef MAXCOMP
+#define MAXCOMP		MAXCSAMP	/* #components we support */
+#endif
+					/* Set in-core data type */
+#if !defined(DTrmx_native) || DTrmx_native==DTfloat
+#define	DTrmx_native	DTfloat
+#define rmx_dtype	float
+#define rmx_scanfmt	"%f"
+#elif DTrmx_native==DTdouble
+#define	rmx_dtype	double
+#define rmx_scanfmt	"%lf"
+#endif
+
+/* General [row][col][cmp] component matrix */
 typedef struct {
-	int	nrows, ncols, ncomp;
-	int	dtype;
-	char	*info;
-	double	mtx[1];			/* extends struct */
+	char		*info;
+	void		*mapped;
+	rmx_dtype	*mtx;
+	COLOR		cexp;
+	float		wlpart[4];
+	int		nrows, ncols;
+	short		ncomp;
+	uby8		dtype;
+	uby8		pflags;
 } RMATRIX;
 
-#define rmx_lval(rm,r,c,i)	(rm)->mtx[((i)*(rm)->nrows+(r))*(rm)->ncols+(c)]
+#define rmx_lval(rm,r,c)	((rm)->mtx + (rm)->ncomp*((c)+(size_t)(rm)->ncols*(r)))
+#define rmx_val			rmx_lval
 
-/* Allocate a nr x nc matrix with n components */
+#define rmx_array_size(rm)	(sizeof(rmx_dtype)*(rm)->nrows*(rm)->ncols*(rm)->ncomp)
+#define rmx_mapped_size(rm)	((char *)(rm)->mtx + rmx_array_size(rm) - (char *)(rm)->mapped)
+
+/* Initialize a RMATRIX struct but don't allocate array space */
+extern RMATRIX	*rmx_new(int nr, int nc, int n);
+
+/* Prepare a RMATRIX for writing (allocate array if needed) */
+extern int	rmx_prepare(RMATRIX *rm);
+
+/* Call rmx_new() and rmx_prepare() */
 extern RMATRIX	*rmx_alloc(int nr, int nc, int n);
 
-/* Free a RMATRIX array */
+/* Clear state by freeing info and matrix data */
+extern void	rmx_reset(RMATRIX *rm);
+
+/* Free an RMATRIX struct and data */
 extern void	rmx_free(RMATRIX *rm);
 
 /* Resolve data type based on two input types (returns 0 for mismatch) */
 extern int	rmx_newtype(int dtyp1, int dtyp2);
 
-/* Load matrix from supported file type */
-extern RMATRIX	*rmx_load(const char *fname);
+/* Read matrix header from input stream (cannot be XML) */
+extern int	rmx_load_header(RMATRIX *rm, FILE *fp);
 
+/* Load next row as rmx_dtype (cannot be XML) */
+extern int	rmx_load_row(rmx_dtype *drp, const RMATRIX *rm, FILE *fp);
+
+/* Allocate & load post-header data from stream given type set in rm->dtype */
+extern int	rmx_load_data(RMATRIX *rm, FILE *fp);
+
+/* Load matrix from supported file type (NULL for stdin, '!' with command) */
+extern RMATRIX	*rmx_load(const char *inspec);
+
 /* Append header information associated with matrix data */
 extern int	rmx_addinfo(RMATRIX *rm, const char *info);
 
-/* Write matrix to file type indicated by dtype */
-extern long	rmx_write(const RMATRIX *rm, int dtype, FILE *fp);
+/* Finish writing header data with resolution and format, returning type used */
+extern int	rmx_write_header(const RMATRIX *rm, int dtype, FILE *fp);
 
+/* Write out matrix data (usually by row) */
+extern int	rmx_write_data(const rmx_dtype *dp, int nc, int len,
+				int dtype, FILE *fp);
+
+/* Write matrix using file format indicated by dtype */
+extern int	rmx_write(const RMATRIX *rm, int dtype, FILE *fp);
+
 /* Allocate and assign square identity matrix with n components */
 extern RMATRIX	*rmx_identity(int dim, int n);
 
 /* Duplicate the given matrix */
 extern RMATRIX	*rmx_copy(const RMATRIX *rm);
 
-/* Allocate and assign transposed matrix */
-extern RMATRIX	*rmx_transpose(const RMATRIX *rm);
+/* Replace data in first matrix with data from second */
+extern int	rmx_transfer_data(RMATRIX *rdst, RMATRIX *rsrc, int dometa);
 
+/* Transpose the given matrix */
+extern int	rmx_transpose(RMATRIX *rm);
+
 /* Multiply (concatenate) two matrices and allocate the result */
 extern RMATRIX	*rmx_multiply(const RMATRIX *m1, const RMATRIX *m2);
+
+/* Element-wise multiplication (or division) of m2 into m1 */
+extern int	rmx_elemult(RMATRIX *m1, const RMATRIX *m2, int divide);
 
 /* Sum second matrix into first, applying scale factor beforehand */
 extern int	rmx_sum(RMATRIX *msum, const RMATRIX *madd, const double sf[]);