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
|
# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <mach.h>
include <gki.h>
include <gset.h>
include "../lib/ids.h"
# IDS_GETCELLARRAY -- Fetch a cell array, i.e., two dimensional array of pixels
# (greylevels or colors).
procedure ids_getcellarray (nc, nr, ax1,ay1, ax2,ay2)
int nc, nr # number of pixels in X and Y
int ax1, ay1 # lower left corner of input window
int ax2, ay2 # upper right corner of input window
int x1, y1, x2, y2
int nx,ny # number of device pixels in x and y
real px1, px2, py1, py2
real skip_x, skip_y, sx, sy
real blockx, blocky, bcy
int i, j, startrow, element
real xres, yres
pointer sp, cell
pointer mp # final data pointer to "array" m
bool ca, use_orig, new_row
include "../lib/ids.com"
begin
# determine if can do real cell array.
ca = (IDS_CELLARRAY(i_kt) != 0)
if ( !ca )
return
skip_x = 1.0
skip_y = 1.0
blockx = 1.0
blocky = 1.0
xres = real(i_xres)
yres = real(i_yres)
# adjust pixels for edges
x1 = ax1
x2 = ax2
y1 = ay1
y2 = ay2
call ids_cround(x1,x2,xres)
call ids_cround(y1,y2,yres)
# find out how many real pixels we have to fetch
px1 = real(x1) * xres /(GKI_MAXNDC+1)
py1 = real(y1) * yres /(GKI_MAXNDC+1)
px2 = real(x2) * xres /(GKI_MAXNDC+1)
py2 = real(y2) * yres /(GKI_MAXNDC+1)
nx = int( px2 ) - int( px1 ) + 1
ny = int( py2 ) - int( py1 ) + 1
# if too many data points in input, set skip. If skip is close
# enough to one, set it to one.
# set block replication factors - will be > 1.0 if too few input points.
# cannot set to 1.0 if "close" enough, since, if > 1.0, we don't have
# enough points and so *some* have to be replicated.
if ( nx > nc ) {
skip_x = real(nx)/nc
if ( (skip_x - 1.0)*(nc-1) < 1.0 )
skip_x = 1.0
} else
blockx = real(nc)/nx
if ( ny > nr ) {
skip_y = real(ny)/nr
if ( (skip_y - 1.0)*(nr-1) < 1.0 )
skip_y = 1.0
} else
blocky = real(nr)/ny
# initialize counters
call smark(sp)
# allocate storage for output
call salloc (mp, nc*nr, TY_SHORT)
sy = 0
bcy = blocky
startrow = 1
# see if we can use original data ... no massaging
# also set the initial value of the new_row flag, which tells
# if we have to rebuild the row data
# note that if blockx > 1.0, skip_x must be 1.0, and vv
if ( (skip_x == 1.0) && (blockx == 1.0) ) {
use_orig = true
} else {
use_orig = false
# allocate storage for a row of pixels.
call salloc ( cell, nx, TY_SHORT)
}
new_row = true
# do it
for ( i = 1; i <= nr ; i = i + 1) {
# fetch the row data. The reading routine will figure out
# how to read from the various individual frames and bitplanes.
if ( new_row) {
if (!i_snap)
call zseek (i_out, int(px1), int(py1)+int(sy+0.5))
if ( use_orig )
# just copy it in
if (i_snap)
call do_snap (Mems[mp+startrow-1], nx, int(px1),
int(py1)+int(sy+0.5))
else
call read (i_out, Mems[mp+startrow-1], nx)
else
# into Mems for rework
if (i_snap)
call do_snap (Mems[cell], nx, int(px1),
int(py1)+int(sy+0.5))
else
call read (i_out, Mems[cell], nx)
}
# rework the row data
if ( !use_orig && new_row ) {
if ( skip_x == 1.0)
call ids_blockit(Mems[cell], Mems[mp+startrow-1], nc,
blockx)
else {
sx = 0
for ( j = 1; j <= nc; j = j + 1) {
element = int(sx+0.5)
Mems[mp+startrow-1+j-1] = Mems[cell + element]
sx = sx + skip_x
}
}
}
# if don't need new row of input data, duplicate the
# previous one by copying within the "m" array
if ( ! new_row )
call amovs (Mems[mp+startrow-1-nc], Mems[mp+startrow-1], nc)
#advance a row
startrow = startrow + nc
if ( bcy <= real(i) ) {
sy = sy + skip_y
bcy = bcy + blocky
new_row = true
} else {
new_row = false
}
}
call gki_retcellarray (i_in, Mems[mp], nr * nc)
call sfree(sp)
end
|
