1 |
– |
/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
2 |
– |
|
1 |
|
#ifndef lint |
2 |
< |
static char SCCSid[] = "$SunId$ SGI"; |
2 |
> |
static const char RCSid[] = "$Id$"; |
3 |
|
#endif |
6 |
– |
|
4 |
|
/* |
5 |
|
* Integer operations on COLR scanlines |
6 |
|
*/ |
7 |
|
|
8 |
< |
#include "color.h" |
8 |
> |
#include "copyright.h" |
9 |
|
|
10 |
< |
#define NULL 0 |
10 |
> |
#include <stdio.h> |
11 |
> |
#include <math.h> |
12 |
|
|
13 |
< |
extern char *bmalloc(); |
13 |
> |
#include "rtmisc.h" |
14 |
> |
#include "color.h" |
15 |
|
|
16 |
+ |
|
17 |
|
#define MAXGSHIFT 31 /* maximum shift for gamma table */ |
18 |
|
|
19 |
< |
static BYTE *g_mant = NULL, *g_nexp = NULL; |
19 |
> |
static uby8 *g_mant = NULL, *g_nexp = NULL; |
20 |
|
|
21 |
< |
static BYTE (*g_bval)[256] = NULL; |
21 |
> |
static uby8 (*g_bval)[256] = NULL; |
22 |
|
|
23 |
– |
#ifndef pow |
24 |
– |
extern double pow(); |
25 |
– |
#endif |
23 |
|
|
24 |
< |
|
24 |
> |
int |
25 |
|
setcolrcor(f, a2) /* set brightness correction */ |
26 |
< |
double (*f)(); |
26 |
> |
double (*f)(double,double); |
27 |
|
double a2; |
28 |
|
{ |
29 |
|
double mult; |
30 |
|
register int i, j; |
31 |
|
/* allocate tables */ |
32 |
|
if (g_bval == NULL && (g_bval = |
33 |
< |
(BYTE (*)[256])bmalloc((MAXGSHIFT+1)*256)) == NULL) |
33 |
> |
(uby8 (*)[256])bmalloc((MAXGSHIFT+1)*256)) == NULL) |
34 |
|
return(-1); |
35 |
|
/* compute colr -> gamb mapping */ |
36 |
|
mult = 1.0/256.0; |
43 |
|
} |
44 |
|
|
45 |
|
|
46 |
+ |
int |
47 |
|
setcolrinv(f, a2) /* set inverse brightness correction */ |
48 |
< |
double (*f)(); |
48 |
> |
double (*f)(double,double); |
49 |
|
double a2; |
50 |
|
{ |
51 |
|
double mult; |
52 |
|
register int i, j; |
53 |
|
/* allocate tables */ |
54 |
< |
if (g_mant == NULL && (g_mant = (BYTE *)bmalloc(256)) == NULL) |
54 |
> |
if (g_mant == NULL && (g_mant = (uby8 *)bmalloc(256)) == NULL) |
55 |
|
return(-1); |
56 |
< |
if (g_nexp == NULL && (g_nexp = (BYTE *)bmalloc(256)) == NULL) |
56 |
> |
if (g_nexp == NULL && (g_nexp = (uby8 *)bmalloc(256)) == NULL) |
57 |
|
return(-1); |
58 |
|
/* compute gamb -> colr mapping */ |
59 |
|
i = 0; |
69 |
|
} |
70 |
|
|
71 |
|
|
72 |
+ |
int |
73 |
|
setcolrgam(g) /* set gamma conversion */ |
74 |
|
double g; |
75 |
|
{ |
79 |
|
} |
80 |
|
|
81 |
|
|
82 |
+ |
int |
83 |
|
colrs_gambs(scan, len) /* convert scanline of colrs to gamma bytes */ |
84 |
|
register COLR *scan; |
85 |
|
int len; |
129 |
|
} |
130 |
|
|
131 |
|
|
132 |
+ |
int |
133 |
|
gambs_colrs(scan, len) /* convert gamma bytes to colr scanline */ |
134 |
|
register COLR *scan; |
135 |
|
int len; |
136 |
|
{ |
137 |
|
register int nexpo; |
138 |
|
|
139 |
< |
if (g_mant == NULL | g_nexp == NULL) |
139 |
> |
if ((g_mant == NULL) | (g_nexp == NULL)) |
140 |
|
return(-1); |
141 |
|
while (len-- > 0) { |
142 |
|
nexpo = g_nexp[scan[0][RED]]; |
166 |
|
} |
167 |
|
|
168 |
|
|
169 |
+ |
void |
170 |
|
shiftcolrs(scan, len, adjust) /* shift a scanline of colors by 2^adjust */ |
171 |
|
register COLR *scan; |
172 |
|
register int len; |
188 |
|
} |
189 |
|
|
190 |
|
|
191 |
+ |
void |
192 |
|
normcolrs(scan, len, adjust) /* normalize a scanline of colrs */ |
193 |
|
register COLR *scan; |
194 |
|
int len; |