Python code coverage for Lib/plat-irix5/jpeg.py

#	count	content
1	n/a	# Implement 'jpeg' interface using SGI's compression library
2	n/a
3	n/a	# XXX Options 'smooth' and 'optimize' are ignored.
4	n/a
5	n/a	# XXX It appears that compressing grayscale images doesn't work right;
6	n/a	# XXX the resulting file causes weirdness.
7	n/a	from warnings import warnpy3k
8	n/a	warnpy3k("the jpeg module has been removed in Python 3.0", stacklevel=2)
9	n/a	del warnpy3k
10	n/a
11	n/a	class error(Exception):
12	n/a	pass
13	n/a
14	n/a	options = {'quality': 75, 'optimize': 0, 'smooth': 0, 'forcegray': 0}
15	n/a
16	n/a	comp = None
17	n/a	decomp = None
18	n/a
19	n/a	def compress(imgdata, width, height, bytesperpixel):
20	n/a	global comp
21	n/a	import cl
22	n/a	if comp is None: comp = cl.OpenCompressor(cl.JPEG)
23	n/a	if bytesperpixel == 1:
24	n/a	format = cl.GRAYSCALE
25	n/a	elif bytesperpixel == 4:
26	n/a	format = cl.RGBX
27	n/a	if options['forcegray']:
28	n/a	iformat = cl.GRAYSCALE
29	n/a	else:
30	n/a	iformat = cl.YUV
31	n/a	# XXX How to support 'optimize'?
32	n/a	params = [cl.IMAGE_WIDTH, width, cl.IMAGE_HEIGHT, height, \
33	n/a	cl.ORIGINAL_FORMAT, format, \
34	n/a	cl.ORIENTATION, cl.BOTTOM_UP, \
35	n/a	cl.QUALITY_FACTOR, options['quality'], \
36	n/a	cl.INTERNAL_FORMAT, iformat, \
37	n/a	]
38	n/a	comp.SetParams(params)
39	n/a	jpegdata = comp.Compress(1, imgdata)
40	n/a	return jpegdata
41	n/a
42	n/a	def decompress(jpegdata):
43	n/a	global decomp
44	n/a	import cl
45	n/a	if decomp is None: decomp = cl.OpenDecompressor(cl.JPEG)
46	n/a	headersize = decomp.ReadHeader(jpegdata)
47	n/a	params = [cl.IMAGE_WIDTH, 0, cl.IMAGE_HEIGHT, 0, cl.INTERNAL_FORMAT, 0]
48	n/a	decomp.GetParams(params)
49	n/a	width, height, format = params[1], params[3], params[5]
50	n/a	if format == cl.GRAYSCALE or options['forcegray']:
51	n/a	format = cl.GRAYSCALE
52	n/a	bytesperpixel = 1
53	n/a	else:
54	n/a	format = cl.RGBX
55	n/a	bytesperpixel = 4
56	n/a	# XXX How to support 'smooth'?
57	n/a	params = [cl.ORIGINAL_FORMAT, format, \
58	n/a	cl.ORIENTATION, cl.BOTTOM_UP, \
59	n/a	cl.FRAME_BUFFER_SIZE, widthheightbytesperpixel]
60	n/a	decomp.SetParams(params)
61	n/a	imgdata = decomp.Decompress(1, jpegdata)
62	n/a	return imgdata, width, height, bytesperpixel
63	n/a
64	n/a	def setoption(name, value):
65	n/a	if type(value) is not type(0):
66	n/a	raise TypeError, 'jpeg.setoption: numeric options only'
67	n/a	if name == 'forcegrey':
68	n/a	name = 'forcegray'
69	n/a	if not options.has_key(name):
70	n/a	raise KeyError, 'jpeg.setoption: unknown option name'
71	n/a	options[name] = int(value)
72	n/a
73	n/a	def test():
74	n/a	import sys
75	n/a	if sys.argv[1:2] == ['-g']:
76	n/a	del sys.argv[1]
77	n/a	setoption('forcegray', 1)
78	n/a	if not sys.argv[1:]:
79	n/a	sys.argv.append('/usr/local/images/data/jpg/asterix.jpg')
80	n/a	for file in sys.argv[1:]:
81	n/a	show(file)
82	n/a
83	n/a	def show(file):
84	n/a	import gl, GL, DEVICE
85	n/a	jpegdata = open(file, 'r').read()
86	n/a	imgdata, width, height, bytesperpixel = decompress(jpegdata)
87	n/a	gl.foreground()
88	n/a	gl.prefsize(width, height)
89	n/a	win = gl.winopen(file)
90	n/a	if bytesperpixel == 1:
91	n/a	gl.cmode()
92	n/a	gl.pixmode(GL.PM_SIZE, 8)
93	n/a	gl.gconfig()
94	n/a	for i in range(256):
95	n/a	gl.mapcolor(i, i, i, i)
96	n/a	else:
97	n/a	gl.RGBmode()
98	n/a	gl.pixmode(GL.PM_SIZE, 32)
99	n/a	gl.gconfig()
100	n/a	gl.qdevice(DEVICE.REDRAW)
101	n/a	gl.qdevice(DEVICE.ESCKEY)
102	n/a	gl.qdevice(DEVICE.WINQUIT)
103	n/a	gl.qdevice(DEVICE.WINSHUT)
104	n/a	gl.lrectwrite(0, 0, width-1, height-1, imgdata)
105	n/a	while 1:
106	n/a	dev, val = gl.qread()
107	n/a	if dev in (DEVICE.ESCKEY, DEVICE.WINSHUT, DEVICE.WINQUIT):
108	n/a	break
109	n/a	if dev == DEVICE.REDRAW:
110	n/a	gl.lrectwrite(0, 0, width-1, height-1, imgdata)
111	n/a	gl.winclose(win)
112	n/a	# Now test the compression and write the result to a fixed filename
113	n/a	newjpegdata = compress(imgdata, width, height, bytesperpixel)
114	n/a	open('/tmp/j.jpg', 'w').write(newjpegdata)