--- ray/src/util/rmatrix.h	2023/12/06 17:57:34	2.20
+++ ray/src/util/rmatrix.h	2025/04/04 18:06:48	2.26
@@ -1,4 +1,4 @@
-/* RCSid $Id: rmatrix.h,v 2.20 2023/12/06 17:57:34 greg Exp $ */
+/* RCSid $Id: rmatrix.h,v 2.26 2025/04/04 18:06:48 greg Exp $ */
 /*
  * Header file for general matrix routines.
  */
@@ -16,22 +16,43 @@ extern "C" {
 	none, transmission, reflection front (normal side), reflection back */
 typedef enum {RMPnone=-1, RMPtrans=0, RMPreflF, RMPreflB} RMPref;
 
+/* 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 {
-	char	*info;
-	void	*mapped;
-	double	*mtx;
-	COLOR	cexp;
-	float	wlpart[4];
-	int	nrows, ncols;
-	short	ncomp;
-	uby8	dtype;
-	uby8	swapin;
+	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)	((rm)->mtx + (rm)->ncomp*((c)+(size_t)(rm)->ncols*(r)))
 #define rmx_val			rmx_lval
 
+#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);
 
@@ -53,8 +74,8 @@ extern int	rmx_newtype(int dtyp1, int dtyp2);
 /* Read matrix header from input stream (cannot be XML) */
 extern int	rmx_load_header(RMATRIX *rm, FILE *fp);
 
-/* Load next row as double (cannot be XML) */
-extern int	rmx_load_row(double *drp, const 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);
@@ -69,7 +90,7 @@ extern int	rmx_addinfo(RMATRIX *rm, const char *info);
 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 double *dp, int nc, int len,
+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 */
@@ -84,8 +105,8 @@ extern RMATRIX	*rmx_copy(const RMATRIX *rm);
 /* Replace data in first matrix with data from second */
 extern int	rmx_transfer_data(RMATRIX *rdst, RMATRIX *rsrc, int dometa);
 
-/* Allocate and assign transposed matrix */
-extern RMATRIX	*rmx_transpose(const RMATRIX *rm);
+/* 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);