def makeA85Image(filename, IMG=None):
import zlib
img = ImageReader(filename)
if IMG is not None: IMG.append(img)
imgwidth, imgheight = img.getSize()
raw = img.getRGBData()
code = []
append = code.append
# this describes what is in the image itself
append('BI')
append('/W %s /H %s /BPC 8 /CS /%s /F [/A85 /Fl]' %
(imgwidth, imgheight, _mode2cs[img.mode]))
append('ID')
#use a flate filter and Ascii Base 85
assert len(raw) == imgwidth * imgheight * _mode2bpp[
img.mode], "Wrong amount of data for image"
compressed = zlib.compress(raw) #this bit is very fast...
encoded = _AsciiBase85Encode(compressed) #...sadly this may not be
#append in blocks of 60 characters
_chunker(encoded, code)
append('EI')
return code
def cacheImageFile(filename, returnInMemory=0, IMG=None):
"Processes image as if for encoding, saves to a file with .a85 extension."
from reportlab.lib.utils import PIL_Image, open_for_read
import zlib
cachedname = os.path.splitext(filename)[0] + '.a85'
if filename==cachedname:
if cachedImageExists(filename):
if returnInMemory: return split(open_for_read(cachedname).read(),LINEEND)[:-1]
else:
raise IOError, 'No such cached image %s' % filename
else:
img1 = PIL_Image.open(open_for_read(filename))
img = img1.convert('RGB')
if IMG is not None: IMG.append(img)
imgwidth, imgheight = img.size
code = []
code.append('BI') # begin image
# this describes what is in the image itself
code.append('/W %s /H %s /BPC 8 /CS /RGB /F [/A85 /Fl]' % (imgwidth, imgheight))
code.append('ID')
#use a flate filter and Ascii Base 85
raw = img.tostring()
assert(len(raw) == imgwidth * imgheight, "Wrong amount of data for image")
compressed = zlib.compress(raw) #this bit is very fast...
encoded = _AsciiBase85Encode(compressed) #...sadly this isn't
#write in blocks of 60 characters per line
outstream = getStringIO(encoded)
dataline = outstream.read(60)
while dataline <> "":
code.append(dataline)
dataline = outstream.read(60)
code.append('EI')
if returnInMemory: return code
#save it to a file
f = open(cachedname,'wb')
f.write(join(code, LINEEND)+LINEEND)
f.close()
if rl_config.verbose:
print 'cached image as %s' % cachedname
def cacheImageFile(filename, returnInMemory=0, IMG=None):
"Processes image as if for encoding, saves to a file with .a85 extension."
from reportlab.lib.utils import open_for_read
import zlib
cachedname = os.path.splitext(filename)[0] + '.a85'
if filename==cachedname:
if cachedImageExists(filename):
if returnInMemory: return split(open_for_read(cachedname).read(),LINEEND)[:-1]
else:
raise IOError, 'No such cached image %s' % filename
else:
img = ImageReader(filename)
if IMG is not None: IMG.append(img)
imgwidth, imgheight = img.getSize()
raw = img.getRGBData()
code = []
# this describes what is in the image itself
code.append('BI')
code.append('/W %s /H %s /BPC 8 /CS /RGB /F [/A85 /Fl]' % (imgwidth, imgheight))
code.append('ID')
#use a flate filter and Ascii Base 85
assert(len(raw) == imgwidth * imgheight, "Wrong amount of data for image")
compressed = zlib.compress(raw) #this bit is very fast...
encoded = _AsciiBase85Encode(compressed) #...sadly this may not be
#append in blocks of 60 characters
_chunker(encoded,code)
code.append('EI')
if returnInMemory: return code
#save it to a file
f = open(cachedname,'wb')
f.write(join(code, LINEEND)+LINEEND)
f.close()
if rl_config.verbose:
print 'cached image as %s' % cachedname
def makeA85Image(filename,IMG=None):
import zlib
img = ImageReader(filename)
if IMG is not None: IMG.append(img)
imgwidth, imgheight = img.getSize()
raw = img.getRGBData()
code = []
append = code.append
# this describes what is in the image itself
append('BI')
append('/W %s /H %s /BPC 8 /CS /%s /F [/A85 /Fl]' % (imgwidth, imgheight,_mode2cs[img.mode]))
append('ID')
#use a flate filter and Ascii Base 85
assert len(raw) == imgwidth * imgheight*_mode2bpp[img.mode], "Wrong amount of data for image"
compressed = zlib.compress(raw) #this bit is very fast...
encoded = _AsciiBase85Encode(compressed) #...sadly this may not be
#append in blocks of 60 characters
_chunker(encoded,code)
append('EI')
return code
def encrypt(self,s):
return self.__rotate(_AsciiBase85Encode(''.join(map(chr,self.__fusc(map(ord,s))))),self._n)
def encrypt(self,s):
return self.__rotate(_AsciiBase85Encode(''.join(map(chr,self.__fusc(map(ord,s))))),self._n)
def test_AsciiBase85Encode(self):
from _rl_accel import _AsciiBase85Encode
assert _AsciiBase85Encode('Dragan Andric') == '6ul^K@;[2RDIdd%@f~>'
def test_AsciiBase85Encode(self):
from _rl_accel import _AsciiBase85Encode
assert _AsciiBase85Encode('Dragan Andric')=='6ul^K@;[2RDIdd%@f~>'