1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <mach.h>
include <math.h>
include "zdisplay.h"
include "iis.h"
# These procedures have been modified to limit the maximum output level.
define NIN 256 # Number of input levels
define NOUT 1024 # Number of output levels
# IISOFM -- Output color mapping.
procedure iisofm (map)
char map[ARB] # type of mapping
int i
short lutr[LEN_OFM]
short lutg[LEN_OFM]
short lutb[LEN_OFM]
begin
if (map[1] == 'm') { # MONO
do i = 1, LEN_OFM
lutr[i] = min ((i - 1) * NOUT / NIN, NOUT)
call iiswom (MONO, lutr)
return
}
call aclrs (lutr, LEN_OFM)
call aclrs (lutg, LEN_OFM)
call aclrs (lutb, LEN_OFM)
if (map[1] == 'l') { # LINEAR
call iislps (lutb, lutg, lutr)
} else if (map[1] == '8') { # 8COLOR
do i = 33, 64 {
lutb[i] = NOUT - 1
lutr[i] = NOUT - 1
}
do i = 65, 96
lutb[i] = NOUT - 1
do i = 97, 128 {
lutb[i] = NOUT - 1
lutg[i] = NOUT - 1
}
do i = 129, 160
lutg[i] = NOUT - 1
do i = 161, 192 {
lutg[i] = NOUT - 1
lutr[i] = NOUT - 1
}
do i = 193, 224
lutr[i] = NOUT - 1
do i = 225, 256 {
lutr[i] = NOUT - 1
lutg[i] = NOUT - 1
lutb[i] = NOUT - 1
}
do i = 257, LEN_OFM {
lutr[i] = NOUT - 1
lutg[i] = NOUT - 1
lutb[i] = NOUT - 1
}
} else if (map[1] == 'r') { # RANDOM
do i = 2, LEN_OFM, 8 {
lutr[i] = NOUT - 1
lutb[i] = NOUT - 1
}
do i = 3, LEN_OFM, 8
lutb[i] = NOUT - 1
do i = 4, LEN_OFM, 8 {
lutb[i] = NOUT - 1
lutg[i] = NOUT - 1
}
do i = 5, LEN_OFM, 8
lutg[i] = NOUT - 1
do i = 6, LEN_OFM, 8 {
lutg[i] = NOUT - 1
lutr[i] = NOUT - 1
}
do i = 7, LEN_OFM, 8
lutr[i] = NOUT - 1
do i = 8, LEN_OFM, 8 {
lutr[i] = NOUT - 1
lutg[i] = NOUT - 1
lutb[i] = NOUT - 1
}
}
call iiswom (RED, lutr)
call iiswom (GREEN, lutg)
call iiswom (BLUE, lutb)
end
# IISWOM -- Write output color look up table.
procedure iiswom (color, lut)
int color
short lut[ARB]
int status
begin
call iishdr (IWRITE+VRETRACE, LEN_OFM, OFM, ADVXONTC, ADVYONXOV,
color, 0)
call iisio (lut, LEN_OFM * SZB_CHAR, status)
end
# IISROM -- Read color look up table.
procedure iisrom (color, lut)
int color
short lut[ARB]
int status
begin
call iishdr (IREAD+VRETRACE, LEN_OFM, LUT, ADVXONTC, ADVYONXOV,
color, 0)
call iisio (lut, LEN_OFM * SZB_CHAR, status)
end
# Linear Pseudocolor Modelling code.
define BCEN 64
define GCEN 128
define RCEN 196
# IISLPS -- Load the RGB luts for linear pseudocolor.
procedure iislps (lutb, lutg, lutr)
short lutb[ARB] # blue lut
short lutg[ARB] # green lut
short lutr[ARB] # red lut
begin
# Set the mappings for the primary color bands.
call iislps_curve (lutb, NIN, BCEN, NOUT - 1, NIN/2)
call iislps_curve (lutg, NIN, GCEN, NOUT - 1, NIN/2)
call iislps_curve (lutr, NIN, RCEN, NOUT - 1, NIN/2)
# Add one half band of white color at the right.
call iislps_curve (lutb, NIN, NIN, NOUT - 1, NIN/2)
call iislps_curve (lutg, NIN, NIN, NOUT - 1, NIN/2)
call iislps_curve (lutr, NIN, NIN, NOUT - 1, NIN/2)
end
# IISLPS_CURVE -- Compute the lookup table for a single color.
procedure iislps_curve (y, npts, xc, height, width)
short y[npts] # output curve
int npts # number of points
int xc # x center
int height, width
int i
real dx, dy, hw
begin
hw = width / 2.0
dy = height / hw * 2.0
do i = 1, npts {
dx = abs (i - xc)
if (dx > hw)
;
else if (dx > hw / 2.0)
y[i] = max (int(y[i]), min (height, int((hw - dx) * dy)))
else
y[i] = height
}
end
|
