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1 files changed, 62 insertions, 0 deletions

diff --git a/sys/imio/imgobf.x b/sys/imio/imgobf.x
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+++ b/sys/imio/imgobf.x
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+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<imhdr.h>
+include	<imio.h>
+
+# IMGOBF -- Get output buffer.
+
+pointer procedure imgobf (im, vs, ve, ndim, dtype)
+
+pointer	im, bdes
+int	ndim, dtype, i
+long	vs[ndim], ve[ndim]
+long	nchars, totpix, imcssz(), clktime()
+int	sizeof()
+
+errchk	imopsf, malloc, realloc, calloc
+
+include	<szpixtype.inc>
+
+begin
+	# If first write, and if new image, create pixel storage file,
+	# otherwise open pixel storage file.  Allocate and initialize
+	# output buffer descriptor.
+
+	if (IM_OBDES(im) == NULL) {
+	    call imopsf (im)
+	    call calloc (IM_OBDES(im), LEN_BDES, TY_STRUCT)
+	    IM_MTIME(im) = clktime (long(0))
+	    IM_SVMTIME(im) = IM_MTIME(im)
+	}
+
+	bdes = IM_OBDES(im)
+
+	# Compute the size of buffer needed.  A few extra chars are added
+	# to guarantee that there won't be a memory violation when
+	# writing a full physical length line.
+
+	nchars = imcssz (im, vs, ve, ndim, dtype, totpix, IM_WRITE)
+
+	if (nchars < BD_BUFSIZE(bdes))
+	    call realloc (BD_BUFPTR(bdes), nchars, TY_CHAR)
+	else if (nchars > BD_BUFSIZE(bdes)) {
+	    call mfree (BD_BUFPTR(bdes), TY_CHAR)
+	    call malloc (BD_BUFPTR(bdes), nchars, TY_CHAR)
+	}
+
+	# Save section coordinates, datatype of pixels in buffer
+	# descriptor, and return buffer pointer to calling program.
+
+	IM_LASTBDES(im) = bdes
+	BD_BUFSIZE(bdes) = nchars
+	BD_DTYPE(bdes) = dtype
+	BD_NPIX(bdes) = totpix
+	BD_NDIM(bdes) = ndim
+
+	do i = 1, ndim {
+	    BD_VS(bdes,i) = vs[i]
+	    BD_VE(bdes,i) = ve[i]
+	}
+
+	return ((BD_BUFPTR(bdes) - 1) / sizeof(dtype) + 1)
+end