| 1 | – | /* Copyright (c) 1992 Regents of the University of California */ | 
| 2 | – |  | 
| 1 |  | #ifndef lint | 
| 2 | < | static char SCCSid[] = "$SunId$ LBL"; | 
| 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 | – | extern double   pow(); | 
| 23 |  |  | 
| 24 | < |  | 
| 25 | < | setcolrcor(f, a2)               /* set brightness correction */ | 
| 26 | < | double  (*f)(); | 
| 27 | < | double  a2; | 
| 24 | > | int | 
| 25 | > | setcolrcor(                     /* set brightness correction */ | 
| 26 | > | double  (*f)(double,double), | 
| 27 | > | double  a2 | 
| 28 | > | ) | 
| 29 |  | { | 
| 30 |  | double  mult; | 
| 31 | < | register int    i, j; | 
| 31 | > | int     i, j; | 
| 32 |  | /* allocate tables */ | 
| 33 |  | if (g_bval == NULL && (g_bval = | 
| 34 | < | (BYTE (*)[256])bmalloc((MAXGSHIFT+1)*256)) == NULL) | 
| 34 | > | (uby8 (*)[256])bmalloc((MAXGSHIFT+1)*256)) == NULL) | 
| 35 |  | return(-1); | 
| 36 |  | /* compute colr -> gamb mapping */ | 
| 37 |  | mult = 1.0/256.0; | 
| 44 |  | } | 
| 45 |  |  | 
| 46 |  |  | 
| 47 | < | setcolrinv(f, a2)               /* set inverse brightness correction */ | 
| 48 | < | double  (*f)(); | 
| 49 | < | double  a2; | 
| 47 | > | int | 
| 48 | > | setcolrinv(                     /* set inverse brightness correction */ | 
| 49 | > | double  (*f)(double,double), | 
| 50 | > | double  a2 | 
| 51 | > | ) | 
| 52 |  | { | 
| 53 |  | double  mult; | 
| 54 | < | register int    i, j; | 
| 54 | > | int     i, j; | 
| 55 |  | /* allocate tables */ | 
| 56 | < | if (g_mant == NULL && (g_mant = (BYTE *)bmalloc(256)) == NULL) | 
| 56 | > | if (g_mant == NULL && (g_mant = (uby8 *)bmalloc(256)) == NULL) | 
| 57 |  | return(-1); | 
| 58 | < | if (g_nexp == NULL && (g_nexp = (BYTE *)bmalloc(256)) == NULL) | 
| 58 | > | if (g_nexp == NULL && (g_nexp = (uby8 *)bmalloc(256)) == NULL) | 
| 59 |  | return(-1); | 
| 60 |  | /* compute gamb -> colr mapping */ | 
| 61 |  | i = 0; | 
| 62 |  | mult = 256.0; | 
| 63 | < | for (j = 255; j > 0; j--) { | 
| 64 | < | while ((g_mant[j] = mult * (*f)(j/256.0, a2)) < 128) { | 
| 63 | > | for (j = 256; j--; ) { | 
| 64 | > | while ((g_mant[j] = mult * (*f)((j+.5)/256.0, a2)) < 128) { | 
| 65 |  | i++; | 
| 66 |  | mult *= 2.0; | 
| 67 |  | } | 
| 68 |  | g_nexp[j] = i; | 
| 69 |  | } | 
| 68 | – | g_mant[0] = 0; | 
| 69 | – | g_nexp[0] = COLXS; | 
| 70 |  | return(0); | 
| 71 |  | } | 
| 72 |  |  | 
| 73 |  |  | 
| 74 | < | setcolrgam(g)                   /* set gamma conversion */ | 
| 75 | < | double  g; | 
| 74 | > | int | 
| 75 | > | setcolrgam(                             /* set gamma conversion */ | 
| 76 | > | double  g | 
| 77 | > | ) | 
| 78 |  | { | 
| 79 |  | if (setcolrcor(pow, 1.0/g) < 0) | 
| 80 |  | return(-1); | 
| 82 |  | } | 
| 83 |  |  | 
| 84 |  |  | 
| 85 | < | colrs_gambs(scan, len)          /* convert scanline of colrs to gamma bytes */ | 
| 86 | < | register COLR   *scan; | 
| 87 | < | int     len; | 
| 85 | > | int | 
| 86 | > | colrs_gambs(                    /* convert scanline of colrs to gamma bytes */ | 
| 87 | > | COLR    *scan, | 
| 88 | > | int     len | 
| 89 | > | ) | 
| 90 |  | { | 
| 91 | < | register int    i, expo; | 
| 91 | > | int     i, expo; | 
| 92 |  |  | 
| 93 |  | if (g_bval == NULL) | 
| 94 |  | return(-1); | 
| 133 |  | } | 
| 134 |  |  | 
| 135 |  |  | 
| 136 | < | gambs_colrs(scan, len)          /* convert gamma bytes to colr scanline */ | 
| 137 | < | register COLR   *scan; | 
| 138 | < | int     len; | 
| 136 | > | int | 
| 137 | > | gambs_colrs(            /* convert gamma bytes to colr scanline */ | 
| 138 | > | COLR    *scan, | 
| 139 | > | int     len | 
| 140 | > | ) | 
| 141 |  | { | 
| 142 | < | register int    nexpo; | 
| 142 | > | int     nexpo; | 
| 143 |  |  | 
| 144 | < | if (g_mant == NULL | g_nexp == NULL) | 
| 144 | > | if ((g_mant == NULL) | (g_nexp == NULL)) | 
| 145 |  | return(-1); | 
| 146 |  | while (len-- > 0) { | 
| 147 |  | nexpo = g_nexp[scan[0][RED]]; | 
| 171 |  | } | 
| 172 |  |  | 
| 173 |  |  | 
| 174 | < | shiftcolrs(scan, len, adjust)   /* shift a scanline of colors by 2^adjust */ | 
| 175 | < | register COLR   *scan; | 
| 176 | < | register int    len; | 
| 177 | < | register int    adjust; | 
| 174 | > | void | 
| 175 | > | shiftcolrs(             /* shift a scanline of colors by 2^adjust */ | 
| 176 | > | COLR    *scan, | 
| 177 | > | int     len, | 
| 178 | > | int     adjust | 
| 179 | > | ) | 
| 180 |  | { | 
| 181 |  | int     minexp; | 
| 182 |  |  | 
| 194 |  | } | 
| 195 |  |  | 
| 196 |  |  | 
| 197 | < | normcolrs(scan, len, adjust)    /* normalize a scanline of colrs */ | 
| 198 | < | register COLR  *scan; | 
| 199 | < | int  len; | 
| 200 | < | int  adjust; | 
| 197 | > | void | 
| 198 | > | normcolrs(              /* normalize a scanline of colrs */ | 
| 199 | > | COLR  *scan, | 
| 200 | > | int  len, | 
| 201 | > | int  adjust | 
| 202 | > | ) | 
| 203 |  | { | 
| 204 | < | register int  c; | 
| 205 | < | register int  shift; | 
| 204 | > | int  c; | 
| 205 | > | int  shift; | 
| 206 |  |  | 
| 207 |  | while (len-- > 0) { | 
| 208 |  | shift = scan[0][EXP] + adjust - COLXS; |