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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <gki.h>
include <gset.h>
include "../lib/ids.h"
# number of grey scale symbols
define NSYMBOL 11
define TSIZE (1.0/2.0)
# IDS_PUTCELLARRAY -- Draw a cell array, i.e., two dimensional array of pixels
# (greylevels or colors).
procedure ids_putcellarray (m, nc, nr, ax1,ay1, ax2,ay2)
short m[ARB] # cell array
int nc, nr # number of pixels in X and Y
# (number of columns[x], rows[y]
int ax1, ay1 # lower left corner of output window
int ax2, ay2 # upper right corner of output window
int x1,y1,x2,y2
real px1, py1, px2, py2
int nx, ny
real skip_x, skip_y, sx, sy
real blockx, blocky, bcy
int i, j, startrow, element
real xres, yres
pointer sp, cell
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 fill
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 ( nc > nx ) {
skip_x = real(nc)/nx
if ( (skip_x - 1.0)*(nx-1) < 1.0 )
skip_x = 1.0
} else
blockx = real(nx)/nc
if ( nr > ny ) {
skip_y = real(nr)/ny
if ( (skip_y - 1.0)*(ny-1) < 1.0 )
skip_y = 1.0
} else
blocky = real(ny)/nr
# initialize counters
call smark(sp)
sy = skip_y
bcy = blocky
startrow = 1
element = startrow
# 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
new_row = false
} else {
use_orig = false
new_row = true
# allocate storage for a row of pixels.
call salloc ( cell, nx, TY_SHORT)
}
# do it
for ( i = 1; i <= ny ; i = i + 1) {
# Build the row data.
if (!use_orig && new_row) {
if ( skip_x == 1.0)
call ids_blockit(m[element], Mems[cell], nx, blockx)
else {
sx = skip_x
for ( j = 1; j <= nx; j = j + 1) {
Mems[cell+j-1] = m[element]
element = startrow + int(sx+0.5)
sx = sx + skip_x
}
}
}
# Send the row data. The writing routine will figure out
# how to send to the various individual frames and bitplanes.
call zseek (i_out, int(px1), int(py1)+i-1)
if (use_orig)
call write (i_out, m[element], nx)
else
call write (i_out, Mems[cell], nx)
# Advance a row.
element = startrow
if ( bcy <= real(i) ) {
startrow = 1 + nc * int(sy+0.5)
element = startrow
sy = sy + skip_y
bcy = bcy + blocky
new_row = true
} else {
new_row = false
}
}
call sfree(sp)
end
# IDS_BLOCKIT -- block replication of data
procedure ids_blockit( from, to, count, factor)
short from[ARB] # input data
short to[ARB] # output data
int count # number of output pixels
real factor # blocking factor
int i, j
real bc
begin
bc = factor
j = 1
for ( i = 1; i <= count ; i = i + 1 ) {
to[i] = from[j]
if ( bc <= real(i) ) {
j = j + 1
bc = bc + factor
}
}
end
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