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# SUNTOIRAF -- Convert 8-bit Sun rasterfile to IRAF image.
include <imhdr.h>
include <error.h>
include <mach.h>
# These comments and defines are from /usr/include/rasterfile.h. We
# should probably recode this using Sun interface routines, but not yet.
# NOTES:
# Each line of the image is rounded out to a multiple of 16 bits.
# This corresponds to the rounding convention used by the memory pixrect
# package (/usr/include/pixrect/memvar.h) of the SunWindows system.
# The ras_encoding field (always set to 0 by Sun's supported software)
# was renamed to ras_length in release 2.0. As a result, rasterfiles
# of type 0 generated by the old software claim to have 0 length; for
# compatibility, code reading rasterfiles must be prepared to compute the
# true length from the width, height, and depth fields.
define RAS_HEADER_LEN 8
define RAS_MAGIC_NUM Memi[$1] # rasterfile magic number
define RAS_WIDTH Memi[$1+1] # width (pixels) of image
define RAS_HEIGHT Memi[$1+2] # height (pixels) of image
define RAS_DEPTH Memi[$1+3] # depth (1, 8, or 24 bits) of pixel
define RAS_LENGTH Memi[$1+4] # length (bytes) of image
define RAS_TYPE Memi[$1+5] # type of file; see RT_* below
define RAS_MAPTYPE Memi[$1+6] # type of colormap; see RMT_* below
define RAS_MAPLENGTH Memi[$1+7] # length (bytes) of following map
define RAS_MAGIC 059A66A95X
# supported RAS_TYPES
define RT_OLD 0 # Raw pixrect image in 68000 byte order
define RT_STANDARD 1 # Raw pixrect image in 68000 byte order
define RT_BYTE_ENCODED 2 # Run-length compression of bytes
define RT_FORMAT_RGB 3 # XRGB or RGB instead of XBGR or BGR
define RT_FORMAT_TIFF 4 # tiff <-> standard rasterfile
define RT_FORMAT_IFF 5 # iff (TAAC format) <-> standard rasterfile
define RT_EXPERIMENTAL 0xffff # Reserved for testing
# supported RAS_MAPTYPES
define RMT_NONE 0 # ras_maplength is expected to be 0
define RMT_EQUAL_RGB 1 # red[ras_maplength/3],green[],blue[]
define RMT_RAW 2 # Sun registered, not supported, ras_maptype
# NTSC weights for converting color pixels to grayscale
define RED_WT .299
define GREEN_WT .587
define BLUE_WT .114
define BADVALUE 0 # row value for bad read
procedure t_suntoiraf ()
int infile, fd, fdtmp, i, krow, nlut, nchars, junk, nread
pointer fname, image, buf, im, imtmp, pix, sp, sp1, hdr, lut
bool apply_lut, delete_file, verbose, listonly, yflip
int clpopni(), clgfil(), open(), strcmp(), fnroot(), fnextn(), read()
pointer immap(), impl2s()
bool clgetb()
errchk open, read, immap
begin
call smark (sp)
call salloc (hdr, RAS_HEADER_LEN, TY_INT)
call salloc (fname, SZ_FNAME, TY_CHAR)
call salloc (buf, SZ_FNAME, TY_CHAR)
call salloc (image, SZ_LINE, TY_CHAR)
infile = clpopni ("names") # Get the raster/image names.
apply_lut = clgetb ("apply_lut")# Apply the raster lut?
delete_file = clgetb ("delete") # Delete rasterfile after making image?
verbose = clgetb ("verbose") # Verbose output?
listonly = clgetb ("listonly") # Only list the rasterfile headers?
yflip = clgetb ("yflip") # Flip the image top to bottom?
fd = NULL
im = NULL
# Loop over all images
while (clgfil (infile, Memc[fname], SZ_FNAME) != EOF) {
iferr {
fdtmp = open (Memc[fname], READ_ONLY, BINARY_FILE); fd = fdtmp
nread = read (fd, Memi[hdr], RAS_HEADER_LEN * SZ_INT)
if (RAS_MAGIC_NUM(hdr) != RAS_MAGIC)
call error (0, "not a rasterfile")
# correct for an old peculiarity
if (RAS_TYPE(hdr) == RT_OLD && RAS_LENGTH(hdr) == 0)
RAS_LENGTH(hdr) = RAS_WIDTH(hdr) * RAS_HEIGHT(hdr)
if (verbose || listonly) {
call printf ("\n%s is %dx%d pixels by %d bits deep.\n")
call pargstr (Memc[fname])
call pargi (RAS_WIDTH(hdr))
call pargi (RAS_HEIGHT(hdr))
call pargi (RAS_DEPTH(hdr))
call printf (" LENGTH=%d, MAPLENGTH=%d, total=%d bytes.\n")
call pargi (RAS_LENGTH(hdr))
call pargi (RAS_MAPLENGTH(hdr))
call pargi (RAS_LENGTH(hdr) + RAS_MAPLENGTH(hdr) + 32)
call printf (" TYPE=%s, MAP_TYPE=%s.\n")
switch (RAS_TYPE(hdr)) {
case RT_OLD:
call pargstr ("OLD")
case RT_STANDARD:
call pargstr ("STANDARD")
case RT_BYTE_ENCODED:
call pargstr ("BYTE_ENCODED")
case RT_FORMAT_RGB:
call pargstr ("FORMAT_RGB")
case RT_FORMAT_TIFF:
call pargstr ("FORMAT_TIFF")
case RT_FORMAT_IFF:
call pargstr ("FORMAT_IFF")
default:
call pargstr ("EXPERIMENTAL (or unknown)")
}
switch (RAS_MAPTYPE(hdr)) {
case RMT_NONE:
call pargstr ("NONE")
case RMT_EQUAL_RGB:
call pargstr ("EQUAL_RGB")
case RMT_RAW:
call pargstr ("RAW")
default:
call pargstr ("unknown")
}
}
if (! listonly) {
if (RAS_DEPTH(hdr) != 8)
call error (0, "unsupported number of bits/pixel")
if (RAS_TYPE(hdr) != RT_STANDARD && RAS_TYPE(hdr) != RT_OLD)
call error (0, "unsupported rasterfile type")
if (RAS_MAPTYPE(hdr) != RMT_NONE &&
RAS_MAPTYPE(hdr) != RMT_EQUAL_RGB)
call error (0, "unsupported rasterfile type")
junk = fnextn (Memc[fname], Memc[buf], SZ_FNAME)
# remove any `.ras', catch this in calling script
if (strcmp (Memc[buf], "ras") != 0) {
call sprintf (Memc[image], SZ_LINE, "%s")
call pargstr (Memc[fname])
} else {
junk = fnroot (Memc[fname], Memc[buf], SZ_FNAME)
call sprintf (Memc[image], SZ_LINE, "%s")
call pargstr (Memc[buf])
}
imtmp = immap (Memc[image], NEW_IMAGE, 0); im = imtmp
IM_NDIM (im) = 2
IM_LEN (im, 1) = RAS_WIDTH(hdr)
IM_LEN (im, 2) = RAS_HEIGHT(hdr)
IM_PIXTYPE (im) = TY_SHORT
}
} then {
call erract (EA_WARN)
call eprintf ("Error while translating %s\n")
call pargstr (Memc[fname])
if (im != NULL)
call imunmap (im)
if (fd != NULL)
call close (fd)
next
}
if (listonly) {
call close (fd)
next
}
if (verbose) {
call printf (" %s --> %s (%dx%d)\n")
call pargstr (Memc[fname])
call pargstr (Memc[image])
call pargi (RAS_WIDTH(hdr))
call pargi (RAS_HEIGHT(hdr))
call flush (STDOUT)
}
call smark (sp1)
call salloc (pix, RAS_WIDTH(hdr), TY_SHORT)
# Extract the Sun raster LUT
if (RAS_MAPLENGTH(hdr) > 0) {
call salloc (lut, RAS_MAPLENGTH(hdr), TY_SHORT)
# assumes that MAPLENGTH is even (for SZB_CHAR=2)
nread = read (fd, Mems[lut], RAS_MAPLENGTH(hdr) / SZB_CHAR)
call achtbs (Mems[lut], Mems[lut], RAS_MAPLENGTH(hdr))
nlut = RAS_MAPLENGTH(hdr) / 3
}
# round up to account for 16 bit line blocking
nchars = RAS_WIDTH(hdr) / SZB_CHAR + mod (RAS_WIDTH(hdr), SZB_CHAR)
# Access pixels and write them out for each row
do i = 1, RAS_HEIGHT(hdr) {
ifnoerr (nread = read (fd, Mems[pix], nchars)) {
call achtbs (Mems[pix], Mems[pix], RAS_WIDTH(hdr))
if (apply_lut && RAS_MAPLENGTH(hdr) > 0)
call si_lut (Mems[pix], RAS_WIDTH(hdr), Mems[lut], nlut)
} else {
call amovks (BADVALUE, Mems[pix], RAS_WIDTH(hdr))
call eprintf ("Problem reading row %d in %s.\n")
call pargi (i)
call pargstr (Memc[fname])
}
# rasterfile is upside down
if (yflip)
krow = RAS_HEIGHT(hdr)-i+1
else
krow = i
call amovs (Mems[pix], Mems[impl2s (im, krow)], RAS_WIDTH(hdr))
}
call imunmap (im)
call close (fd)
if (delete_file)
call delete (Memc[fname])
call sfree (sp1)
}
call sfree (sp)
end
# SI_LUT -- apply the rasterfile lookup table to each row of the raster.
procedure si_lut (data, ndata, lut, nlut)
short data[ARB] #U data array
int ndata #I size of the data array
short lut[nlut,3] #I RGB lookup tables
int nlut #I size of the lookup table
int idata, idx, i
begin
do i = 1, ndata {
idata = int (data[i]) + 1
idx = min (max (idata, 1), nlut)
data[i] = RED_WT * lut[idx,1] +
GREEN_WT * lut[idx,2] +
BLUE_WT * lut[idx,3]
}
end
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