1 files changed, 91 insertions, 0 deletions
diff --git a/Lib/irix5/torgb.py b/Lib/irix5/torgb.py
new file mode 100755
index 0000000..e46aca3
--- /dev/null
+++ b/Lib/irix5/torgb.py
@@ -0,0 +1,91 @@
+# Convert "arbitrary" image files to rgb files (SGI's image format).
+# Input may be compressed.
+# The uncompressed file type may be PBM, PGM, PPM, GIF, TIFF, or Sun raster.
+# An exception is raised if the file is not of a recognized type.
+# Returned filename is either the input filename or a temporary filename;
+# in the latter case the caller must ensure that it is removed.
+# Other temporary files used are removed by the function.
+
+import os
+import tempfile
+import pipes
+import imghdr
+
+table = {}
+
+t = pipes.Template().init()
+t.append('fromppm $IN $OUT', 'ff')
+table['ppm'] = t
+
+t = pipes.Template().init()
+t.append('pnmtoppm', '--')
+t.append('fromppm $IN $OUT', 'ff')
+table['pnm'] = t
+table['pgm'] = t
+table['pbm'] = t
+
+t = pipes.Template().init()
+t.append('fromgif $IN $OUT', 'ff')
+table['gif'] = t
+
+t = pipes.Template().init()
+t.append('tifftopnm', '--')
+t.append('(PATH=$PATH:/ufs/guido/bin/sgi; exec pnmtoppm)', '--')
+t.append('fromppm $IN $OUT', 'ff')
+table['tiff'] = t
+
+t = pipes.Template().init()
+t.append('rasttopnm', '--')
+t.append('pnmtoppm', '--')
+t.append('fromppm $IN $OUT', 'ff')
+table['rast'] = t
+
+uncompress = pipes.Template().init()
+uncompress.append('uncompress', '--')
+
+
+error = 'torgb.error' # Exception
+
+def torgb(filename):
+	temps = []
+	ret = None
+	try:
+		ret = _torgb(filename, temps)
+	finally:
+		for temp in temps[:]:
+			if temp <> ret:
+				try:
+					os.unlink(temp)
+				except os.error:
+					pass
+				temps.remove(temp)
+	return ret
+
+def _torgb(filename, temps):
+	if filename[-2:] == '.Z':
+		fname = tempfile.mktemp()
+		temps.append(fname)
+		sts = uncompress.copy(filename, fname)
+		if sts:
+			raise error, filename + ': uncompress failed'
+	else:
+		fname = filename
+	try:
+		ftype = imghdr.what(fname)
+	except IOError, msg:
+		if type(msg) == type(()) and len(msg) == 2 and \
+			type(msg[0]) == type(0) and type(msg[1]) == type(''):
+			msg = msg[1]
+		if type(msg) <> type(''):
+			msg = `msg`
+		raise error, filename + ': ' + msg
+	if ftype == 'rgb':
+		return fname
+	if ftype == None or not table.has_key(ftype):
+		raise error, \
+			filename + ': unsupported image file type ' + `ftype`
+	temp = tempfile.mktemp()
+	sts = table[ftype].copy(fname, temp)
+	if sts:
+		raise error, filename + ': conversion to rgb failed'
+	return temp