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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <plset.h>
include <plio.h>
# PL_PIXROP -- Rasterop between source and destination pixel arrays.
procedure pl_pixropi (px_src,xs,src_maxval, px_dst,ds,dst_maxval, npix, rop)
int px_src[ARB] #I source pixel array
int xs #I starting pixel index in src
int src_maxval #I max pixel value in src mask
int px_dst[ARB] #O destination pixel array
int ds #I starting pixel index in dst
int dst_maxval #I max pixel value in dst mask
int npix #I number of pixels to convert
int rop #I rasterop
pointer sp, src
int opcode, i
int data, ceil, src_value
int and(), or(), xor(), not()
define out_ 91
begin
opcode = R_OPCODE(rop)
data = R_DATA(rop)
ceil = 0
# Pixel value to be used if input mask is boolean.
if (src_maxval == 1) {
src_value = data
if (src_value <= 0)
src_value = dst_maxval
}
# Handle the easy cases first.
switch (opcode) {
case PIX_CLR:
call aclri (px_dst[ds], npix)
return
case PIX_SET:
call amovki (data, px_dst[ds], npix)
goto out_
case PIX_SRC:
if (src_maxval != 1)
call amovi (px_src[xs], px_dst[ds], npix)
else {
do i = 1, npix
if (px_src[xs+i-1] > 0)
px_dst[ds+i-1] = src_value
else
px_dst[ds+i-1] = 0
}
goto out_
case PIX_DST:
return # no-op
}
# Integer or boolean source mask?
if (src_maxval != 1) {
# Integer source mask; operate directly on source mask.
switch (opcode) {
case PIX_NOTSRC:
do i = 1, npix
px_dst[ds+i-1] = not (px_src[xs+i-1])
case PIX_NOTDST:
do i = 1, npix
px_dst[ds+i-1] = not (px_dst[xs+i-1])
case PIX_SRC_AND_DST:
do i = 1, npix
px_dst[ds+i-1] = and (px_src[xs+i-1], px_dst[ds+i-1])
case PIX_SRC_OR_DST:
do i = 1, npix
px_dst[ds+i-1] = or (px_src[xs+i-1], px_dst[ds+i-1])
case PIX_SRC_XOR_DST:
do i = 1, npix
px_dst[ds+i-1] = xor (px_src[xs+i-1], px_dst[ds+i-1])
case PIX_SRC_AND_NOTDST:
do i = 1, npix
px_dst[ds+i-1] = and (px_src[xs+i-1], not(px_dst[ds+i-1]))
case PIX_SRC_OR_NOTDST:
do i = 1, npix
px_dst[ds+i-1] = or (px_src[xs+i-1], not(px_dst[ds+i-1]))
case PIX_NOTSRC_AND_DST:
do i = 1, npix
px_dst[ds+i-1] = and (not(px_src[xs+i-1]), px_dst[ds+i-1])
case PIX_NOTSRC_OR_DST:
do i = 1, npix
px_dst[ds+i-1] = or (not(px_src[xs+i-1]), px_dst[ds+i-1])
case PIX_NOT_SRC_AND_DST:
do i = 1, npix
px_dst[ds+i-1] = not (and (px_src[xs+i-1], px_dst[ds+i-1]))
case PIX_NOT_SRC_OR_DST:
do i = 1, npix
px_dst[ds+i-1] = not ( or (px_src[xs+i-1], px_dst[ds+i-1]))
case PIX_NOT_SRC_XOR_DST:
do i = 1, npix
px_dst[ds+i-1] = not (xor (px_src[xs+i-1], px_dst[ds+i-1]))
}
} else {
# Boolean source mask; use integer DATA value from ROP if source
# mask pixel is set.
call smark (sp)
call salloc (src, npix, TY_INT)
do i = 1, npix
if (px_src[xs+i-1] > 0)
Memi[src+i-1] = src_value
else
Memi[src+i-1] = 0
switch (opcode) {
case PIX_NOTSRC:
do i = 1, npix
px_dst[ds+i-1] = not (Memi[src+i-1])
case PIX_NOTDST:
do i = 1, npix
px_dst[ds+i-1] = not (px_dst[xs+i-1])
case PIX_SRC_AND_DST:
do i = 1, npix
px_dst[ds+i-1] = and (Memi[src+i-1], px_dst[ds+i-1])
case PIX_SRC_OR_DST:
do i = 1, npix
px_dst[ds+i-1] = or (Memi[src+i-1], px_dst[ds+i-1])
case PIX_SRC_XOR_DST:
do i = 1, npix
px_dst[ds+i-1] = xor (Memi[src+i-1], px_dst[ds+i-1])
case PIX_SRC_AND_NOTDST:
do i = 1, npix
px_dst[ds+i-1] = and (Memi[src+i-1], not(px_dst[ds+i-1]))
case PIX_SRC_OR_NOTDST:
do i = 1, npix
px_dst[ds+i-1] = or (Memi[src+i-1], not(px_dst[ds+i-1]))
case PIX_NOTSRC_AND_DST:
do i = 1, npix
px_dst[ds+i-1] = and (not(Memi[src+i-1]), px_dst[ds+i-1])
case PIX_NOTSRC_OR_DST:
do i = 1, npix
px_dst[ds+i-1] = or (not(Memi[src+i-1]), px_dst[ds+i-1])
case PIX_NOT_SRC_AND_DST:
do i = 1, npix
px_dst[ds+i-1] = not (and (Memi[src+i-1], px_dst[ds+i-1]))
case PIX_NOT_SRC_OR_DST:
do i = 1, npix
px_dst[ds+i-1] = not ( or (Memi[src+i-1], px_dst[ds+i-1]))
case PIX_NOT_SRC_XOR_DST:
do i = 1, npix
px_dst[ds+i-1] = not (xor (Memi[src+i-1], px_dst[ds+i-1]))
}
call sfree (sp)
}
out_
# If writing to an integer mask, mask the data to the indicated max
# value (necessary to avoid very large values if any NOT operations
# occurred). If writing to a boolean mask, map positive integer mask
# values to 1.
if (dst_maxval == 1) {
data = 1
call argti (px_dst[ds], npix, ceil, data)
} else if (dst_maxval > 1) {
data = dst_maxval
call aandki (px_dst[ds], data, px_dst[ds], npix)
}
end
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