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############################################################################
#
# File: ddextend.icn
#
# Subject: Program to extend pattern to a minimum size
#
# Author: Ralph E. Griswold
#
# Date: June 11, 2002
#
############################################################################
#
# This file is in the public domain.
#
############################################################################
#
# This program reads a drawdown from standard input in the form of
# rows of zeros and ones, in which ones indicate places where the
# warp thread is on top and zeros where the weft thread is on top.
# It also accepts a BLP as input.
#
# At present, the minimum size is 16, built in. This should be changed
# to a value that could be specified as an option.
#
# It outputs a BLP.
#
############################################################################
#
# Links: patutils, patxform
#
############################################################################
link patutils
link patxform
$define Minimum 16
procedure main()
local line, rows, q, r, new_rows
rows := []
line := read() | stop("empty file")
if upto("#", line) then rows := pat2rows(line)
else {
rows := [line]
while put(rows, read()) # read in row pattern
}
while put(rows, read())
# extend width if necessary
if *rows[1] < Minimum then {
q := Minimum / *rows[1]
r := Minimum % *rows[1]
if r ~= 0 then q +:= 1 # extension factor
new_rows := copy(rows)
every 2 to q do
new_rows := pcaten(new_rows, rows, "h")
rows := new_rows
}
# extend height if necessary
if *rows < Minimum then {
q := Minimum / *rows
r := Minimum % *rows
if r ~= 0 then q +:= 1 # extension factor
new_rows := copy(rows)
every 2 to q do
new_rows := pcaten(new_rows, rows, "v")
rows := new_rows
}
write(rows2pat(rows))
end
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