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root/radiance/ray/src/util/cmatrix.h
Revision: 2.8
Committed: Wed Oct 31 22:19:57 2018 UTC (5 years, 4 months ago) by greg
Content type: text/plain
Branch: MAIN
Changes since 2.7: +3 -2 lines
Log Message:
Fix potential issues on very large matrices (> 2GB)

File Contents

# Content
1 /* RCSid $Id: cmatrix.h,v 2.7 2015/05/04 20:53:21 greg Exp $ */
2 /*
3 * Color matrix routine declarations.
4 *
5 * G. Ward
6 */
7
8 #ifndef _RAD_CMATRIX_H_
9 #define _RAD_CMATRIX_H_
10
11 #include <sys/types.h>
12 #include "color.h"
13
14 #ifdef __cplusplus
15 extern "C" {
16 #endif
17
18 /* Data types for file loading */
19 enum {DTfromHeader=0, DTascii, DTrgbe, DTxyze, DTfloat, DTdouble, DTend};
20
21 extern const char *cm_fmt_id[];
22 extern const int cm_elem_size[];
23
24 /* A color coefficient matrix -- vectors have ncols==1 */
25 typedef struct {
26 int nrows, ncols;
27 COLORV cmem[3]; /* extends struct */
28 } CMATRIX;
29
30 #define COLSPEC (sizeof(COLORV)==sizeof(float) ? "%f %f %f" : "%lf %lf %lf")
31
32 #define cm_lval(cm,r,c) ((cm)->cmem + 3*((size_t)(r)*(cm)->ncols + (c)))
33
34 #define cv_lval(cm,i) ((cm)->cmem + 3*(i))
35
36 /* Allocate a color coefficient matrix */
37 extern CMATRIX *cm_alloc(int nrows, int ncols);
38
39 /* Resize color coefficient matrix */
40 extern CMATRIX *cm_resize(CMATRIX *cm, int nrows);
41
42 #define cm_free(cm) free(cm)
43
44 /* Load header to obtain/check data type and matrix dimensions */
45 extern char *cm_getheader(int *dt, int *nr, int *nc, FILE *fp);
46
47 /* Allocate and load a matrix from the given input (or stdin if NULL) */
48 extern CMATRIX *cm_load(const char *inspec, int nrows, int ncols, int dtype);
49
50 /* Extract a column vector from a matrix */
51 extern CMATRIX *cm_column(const CMATRIX *cm, int c);
52
53 /* Scale a matrix by a single value */
54 extern CMATRIX *cm_scale(const CMATRIX *cm1, const COLOR sca);
55
56 /* Multiply two matrices (or a matrix and a vector) and allocate the result */
57 extern CMATRIX *cm_multiply(const CMATRIX *cm1, const CMATRIX *cm2);
58
59 /* write out matrix to file (precede by resolution string if picture) */
60 extern int cm_write(const CMATRIX *cm, int dtype, FILE *fp);
61
62 /* Load and convert a matrix BTDF from the given XML file */
63 extern CMATRIX *cm_loadBTDF(char *fname);
64
65 #ifdef __cplusplus
66 }
67 #endif
68 #endif /* _RAD_CMATRIX_H_ */