def makeA85Image(filename, IMG=None, detectJpeg=False):
import zlib
img = ImageReader(filename)
if IMG is not None:
IMG.append(img)
if detectJpeg and img.jpeg_fh():
return None
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 makeA85Image(filename,IMG=None, detectJpeg=False):
import zlib
img = ImageReader(filename)
if IMG is not None:
IMG.append(img)
if detectJpeg and img.jpeg_fh():
return None
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 PIL_imagedata(self):
image = self.image
if image.format == 'JPEG':
fp = image.fp
fp.seek(0)
return self._jpg_imagedata(fp)
self.source = 'PIL'
zlib = import_zlib()
if not zlib: return
bpc = 8
# Use the colorSpace in the image
if image.mode == 'CMYK':
myimage = image
colorSpace = 'DeviceCMYK'
bpp = 4
elif image.mode == '1':
myimage = image
colorSpace = 'DeviceGray'
bpp = 1
bpc = 1
elif image.mode == 'L':
myimage = image
colorSpace = 'DeviceGray'
bpp = 1
else:
myimage = image.convert('RGB')
colorSpace = 'RGB'
bpp = 3
imgwidth, imgheight = myimage.size
# this describes what is in the image itself
# *NB* according to the spec you can only use the short form in inline images
imagedata = [
'BI /W %d /H %d /BPC %d /CS /%s /F [%s/Fl] ID' %
(imgwidth, imgheight, bpc, colorSpace, rl_config.useA85 and '/A85 '
or '')
]
#use a flate filter and, optionally, Ascii Base 85 to compress
raw = (myimage.tobytes
if hasattr(myimage, 'tobytes') else myimage.tostring)()
rowstride = (imgwidth * bpc * bpp + 7) >> 3
assert len(
raw) == rowstride * imgheight, "Wrong amount of data for image"
data = zlib.compress(raw) #this bit is very fast...
if rl_config.useA85:
data = asciiBase85Encode(data) #...sadly this may not be
#append in blocks of 60 characters
pdfutils._chunker(data, imagedata)
imagedata.append('EI')
return (imagedata, imgwidth, imgheight)
def PIL_imagedata(self):
image = self.image
if image.format == "JPEG":
fp = image.fp
fp.seek(0)
return self._jpg_imagedata(fp)
self.source = "PIL"
zlib = import_zlib()
if not zlib:
return
bpc = 8
# Use the colorSpace in the image
if image.mode == "CMYK":
myimage = image
colorSpace = "DeviceCMYK"
bpp = 4
elif image.mode == "1":
myimage = image
colorSpace = "DeviceGray"
bpp = 1
bpc = 1
elif image.mode == "L":
myimage = image
colorSpace = "DeviceGray"
bpp = 1
else:
myimage = image.convert("RGB")
colorSpace = "RGB"
bpp = 3
imgwidth, imgheight = myimage.size
# this describes what is in the image itself
# *NB* according to the spec you can only use the short form in inline images
imagedata = [
"BI /W %d /H %d /BPC %d /CS /%s /F [%s/Fl] ID"
% (imgwidth, imgheight, bpc, colorSpace, rl_config.useA85 and "/A85 " or "")
]
# use a flate filter and, optionally, Ascii Base 85 to compress
raw = (myimage.tobytes if hasattr(myimage, "tobytes") else myimage.tostring)()
rowstride = (imgwidth * bpc * bpp + 7) >> 3
assert len(raw) == rowstride * imgheight, "Wrong amount of data for image"
data = zlib.compress(raw) # this bit is very fast...
if rl_config.useA85:
data = asciiBase85Encode(data) # ...sadly this may not be
# append in blocks of 60 characters
pdfutils._chunker(data, imagedata)
imagedata.append("EI")
return (imagedata, imgwidth, imgheight)
def PIL_imagedata(self):
image = self.image
if image.format=='JPEG':
fp=image.fp
fp.seek(0)
return self._jpg_imagedata(fp)
self.source = 'PIL'
zlib = import_zlib()
if not zlib: return
bpc = 8
# Use the colorSpace in the image
if image.mode == 'CMYK':
myimage = image
colorSpace = 'DeviceCMYK'
bpp = 4
elif image.mode == '1':
myimage = image
colorSpace = 'DeviceGray'
bpp = 1
bpc = 1
elif image.mode == 'L':
myimage = image
colorSpace = 'DeviceGray'
bpp = 1
else:
myimage = image.convert('RGB')
colorSpace = 'RGB'
bpp = 3
imgwidth, imgheight = myimage.size
# this describes what is in the image itself
# *NB* according to the spec you can only use the short form in inline images
imagedata=['BI /W %d /H %d /BPC %d /CS /%s /F [%s/Fl] ID' % (imgwidth, imgheight, bpc, colorSpace, rl_config.useA85 and '/A85 ' or '')]
#use a flate filter and, optionally, Ascii Base 85 to compress
raw = myimage.tostring()
rowstride = (imgwidth*bpc*bpp+7)/8
assert len(raw) == rowstride*imgheight, "Wrong amount of data for image"
data = zlib.compress(raw) #this bit is very fast...
if rl_config.useA85:
data = asciiBase85Encode(data) #...sadly this may not be
#append in blocks of 60 characters
pdfutils._chunker(data,imagedata)
imagedata.append('EI')
return (imagedata, imgwidth, imgheight)
def _jpg_imagedata(self,imageFile):
info = pdfutils.readJPEGInfo(imageFile)
self.source = 'JPEG'
imgwidth, imgheight = info[0], info[1]
if info[2] == 1:
colorSpace = 'DeviceGray'
elif info[2] == 3:
colorSpace = 'DeviceRGB'
else: #maybe should generate an error, is this right for CMYK?
colorSpace = 'DeviceCMYK'
imageFile.seek(0) #reset file pointer
imagedata = []
#imagedata.append('BI /Width %d /Height /BitsPerComponent 8 /ColorSpace /%s /Filter [/Filter [ /ASCII85Decode /DCTDecode] ID' % (info[0], info[1], colorSpace))
imagedata.append('BI /W %d /H %d /BPC 8 /CS /%s /F [%s/DCT] ID' % (imgwidth, imgheight, colorSpace, rl_config.useA85 and '/A85 ' or ''))
#write in blocks of (??) 60 characters per line to a list
data = imageFile.read()
if rl_config.useA85:
data = asciiBase85Encode(data)
pdfutils._chunker(data,imagedata)
imagedata.append('EI')
return (imagedata, imgwidth, imgheight)
def encrypt(self, s):
return self.__rotate(
asciiBase85Encode(''.join(map(chr, self.__fusc(list(map(ord,
s)))))),
self._n)
def encrypt(self,s):
return self.__rotate(asciiBase85Encode(''.join(map(chr,self.__fusc(list(map(ord,s)))))),self._n)
