--- ray/src/util/cmatrix.h	2020/03/25 01:51:09	2.12
+++ ray/src/util/cmatrix.h	2025/04/19 17:12:59	2.16
@@ -1,4 +1,4 @@
-/* RCSid $Id: cmatrix.h,v 2.12 2020/03/25 01:51:09 greg Exp $ */
+/* RCSid $Id: cmatrix.h,v 2.16 2025/04/19 17:12:59 greg Exp $ */
 /*
  * Color matrix routine declarations.
  *
@@ -15,9 +15,18 @@
 extern "C" {
 #endif
 
-/* Data types for file loading */
-enum {DTfromHeader=0, DTrgbe, DTxyze, DTfloat, DTascii, DTdouble, DTend};
+/* Data types for file loading (used to be an enum) */
+#define DTfromHeader	0
+#define DTrgbe		1
+#define DTxyze		2
+#define DTspec		3
+#define DTfloat		4
+#define DTascii		5
+#define	DTdouble	6
+#define DTend		7
 
+/* Defined in cmconst.c */
+extern const char	stdin_name[];
 extern const char	*cm_fmt_id[];
 extern const int	cm_elem_size[];
 
@@ -58,7 +67,10 @@ extern CMATRIX	*cm_multiply(const CMATRIX *cm1, const 
 extern int	cm_write(const CMATRIX *cm, int dtype, FILE *fp);
 
 /* Load and convert a matrix BTDF from the given XML file */
-extern CMATRIX	*cm_loadBTDF(char *fname);
+extern CMATRIX	*cm_loadBTDF(const char *fname);
+
+/* Load and convert a matrix BRDF from the given XML file */
+extern CMATRIX	*cm_loadBRDF(const char *fname, int backside);
 
 #ifdef __cplusplus
 }