def do_Do(self, xobjid):
xobjid = literal_name(xobjid)
try:
xobj = stream_value(self.xobjmap[xobjid])
except KeyError:
if STRICT:
raise PDFInterpreterError('Undefined xobject id: %r' % xobjid)
return
if 1 <= self.debug:
print(('Processing xobj: %r' % xobj))
subtype = xobj.get('Subtype')
if subtype is LITERAL_FORM and 'BBox' in xobj:
interpreter = self.dup()
bbox = list_value(xobj['BBox'])
matrix = list_value(xobj.get('Matrix', MATRIX_IDENTITY))
# According to PDF reference 1.7 section 4.9.1, XObjects in
# earlier PDFs (prior to v1.2) use the page's Resources entry
# instead of having their own Resources entry.
resources = dict_value(xobj.get('Resources')) or self.resources.copy()
self.device.begin_figure(xobjid, bbox, matrix)
interpreter.render_contents(resources, [xobj], ctm=mult_matrix(matrix, self.ctm))
self.device.end_figure(xobjid)
elif subtype is LITERAL_IMAGE and 'Width' in xobj and 'Height' in xobj:
self.device.begin_figure(xobjid, (0,0,1,1), MATRIX_IDENTITY)
self.device.render_image(xobjid, xobj)
self.device.end_figure(xobjid)
else:
# unsupported xobject type.
pass
return
def lookup(d):
if 'Limits' in d:
(k1,k2) = list_value(d['Limits'])
if key < k1 or k2 < key: return None
if 'Names' in d:
objs = list_value(d['Names'])
names = dict(choplist(2, objs))
return names[key]
if 'Kids' in d:
for c in list_value(d['Kids']):
v = lookup(dict_value(c))
if v: return v
raise KeyError((cat,key))
def __init__(self, rsrcmgr, spec):
firstchar = int_value(spec.get("FirstChar", 0))
lastchar = int_value(spec.get("LastChar", 0))
widths = list_value(spec.get("Widths", [0] * 256))
widths = dict((i + firstchar, w) for (i, w) in enumerate(widths))
if "FontDescriptor" in spec:
descriptor = dict_value(spec["FontDescriptor"])
else:
descriptor = {"Ascent": 0, "Descent": 0, "FontBBox": spec["FontBBox"]}
PDFSimpleFont.__init__(self, descriptor, widths, spec)
self.matrix = tuple(list_value(spec.get("FontMatrix")))
(_, self.descent, _, self.ascent) = self.bbox
(self.hscale, self.vscale) = apply_matrix_norm(self.matrix, (1, 1))
return
def set_parser(self, parser):
"Set the document to use a given PDFParser object."
if self._parser: return
self._parser = parser
# Retrieve the information of each header that was appended
# (maybe multiple times) at the end of the document.
self.xrefs = parser.read_xref()
for xref in self.xrefs:
trailer = xref.get_trailer()
if not trailer: continue
# If there's an encryption info, remember it.
if 'Encrypt' in trailer:
#assert not self.encryption
self.encryption = (list_value(trailer['ID']),
dict_value(trailer['Encrypt']))
if 'Info' in trailer:
self.info.append(dict_value(trailer['Info']))
if 'Root' in trailer:
# Every PDF file must have exactly one /Root dictionary.
self.catalog = dict_value(trailer['Root'])
break
else:
raise PDFSyntaxError('No /Root object! - Is this really a PDF?')
if self.catalog.get('Type') is not LITERAL_CATALOG:
if STRICT:
raise PDFSyntaxError('Catalog not found!')
return
def render_contents(self, resources, streams, ctm=MATRIX_IDENTITY):
if 1 <= self.debug:
print(('render_contents: resources=%r, streams=%r, ctm=%r' %
(resources, streams, ctm)))
self.init_resources(resources)
self.init_state(ctm)
self.execute(list_value(streams))
return
def get_colorspace(spec):
if isinstance(spec, list):
name = literal_name(spec[0])
else:
name = literal_name(spec)
if name == 'ICCBased' and isinstance(spec, list) and 2 <= len(spec):
return PDFColorSpace(name, stream_value(spec[1])['N'])
elif name == 'DeviceN' and isinstance(spec, list) and 2 <= len(spec):
return PDFColorSpace(name, len(list_value(spec[1])))
else:
return PREDEFINED_COLORSPACE[name]
def __init__(self, descriptor, widths, default_width=None):
self.descriptor = descriptor
self.widths = widths
self.fontname = resolve1(descriptor.get("FontName", "unknown"))
if isinstance(self.fontname, PSLiteral):
self.fontname = literal_name(self.fontname)
self.flags = int_value(descriptor.get("Flags", 0))
self.ascent = num_value(descriptor.get("Ascent", 0))
self.descent = num_value(descriptor.get("Descent", 0))
self.italic_angle = num_value(descriptor.get("ItalicAngle", 0))
self.default_width = default_width or num_value(descriptor.get("MissingWidth", 0))
self.leading = num_value(descriptor.get("Leading", 0))
self.bbox = list_value(descriptor.get("FontBBox", (0, 0, 0, 0)))
self.hscale = self.vscale = 0.001
return
def get_font(self, objid, spec):
if objid and objid in self._cached_fonts:
font = self._cached_fonts[objid]
else:
if 2 <= self.debug:
print(('get_font: create: objid=%r, spec=%r' % (objid, spec)))
if STRICT:
if spec['Type'] is not LITERAL_FONT:
raise PDFFontError('Type is not /Font')
# Create a Font object.
if 'Subtype' in spec:
subtype = literal_name(spec['Subtype'])
else:
if STRICT:
raise PDFFontError('Font Subtype is not specified.')
subtype = 'Type1'
if subtype in ('Type1', 'MMType1'):
# Type1 Font
font = PDFType1Font(self, spec)
elif subtype == 'TrueType':
# TrueType Font
font = PDFTrueTypeFont(self, spec)
elif subtype == 'Type3':
# Type3 Font
font = PDFType3Font(self, spec)
elif subtype in ('CIDFontType0', 'CIDFontType2'):
# CID Font
font = PDFCIDFont(self, spec)
elif subtype == 'Type0':
# Type0 Font
dfonts = list_value(spec['DescendantFonts'])
assert dfonts
subspec = dict_value(dfonts[0]).copy()
for k in ('Encoding', 'ToUnicode'):
if k in spec:
subspec[k] = resolve1(spec[k])
font = self.get_font(None, subspec)
else:
if STRICT:
raise PDFFontError('Invalid Font spec: %r' % spec)
font = PDFType1Font(self, spec) # this is so wrong!
if objid and self.caching:
self._cached_fonts[objid] = font
return font
def search(obj, parent):
if isinstance(obj, int):
objid = obj
tree = dict_value(self.getobj(objid)).copy()
else:
objid = obj.objid
tree = dict_value(obj).copy()
for (k,v) in list(parent.items()):
if k in self.INHERITABLE_ATTRS and k not in tree:
tree[k] = v
if tree.get('Type') is LITERAL_PAGES and 'Kids' in tree:
if 1 <= self.debug:
print(('Pages: Kids=%r' % tree['Kids']))
for c in list_value(tree['Kids']):
for x in search(c, tree):
yield x
elif tree.get('Type') is LITERAL_PAGE:
if 1 <= self.debug:
print(('Page: %r' % tree))
yield (objid, tree)
def __init__(self, descriptor, widths, spec):
# Font encoding is specified either by a name of
# built-in encoding or a dictionary that describes
# the differences.
if "Encoding" in spec:
encoding = resolve1(spec["Encoding"])
else:
encoding = LITERAL_STANDARD_ENCODING
if isinstance(encoding, dict):
name = literal_name(encoding.get("BaseEncoding", LITERAL_STANDARD_ENCODING))
diff = list_value(encoding.get("Differences", None))
self.cid2unicode = EncodingDB.get_encoding(name, diff)
else:
self.cid2unicode = EncodingDB.get_encoding(literal_name(encoding))
self.unicode_map = None
if "ToUnicode" in spec:
strm = stream_value(spec["ToUnicode"])
self.unicode_map = FileUnicodeMap()
CMapParser(self.unicode_map, StringIO(strm.get_data())).run()
PDFFont.__init__(self, descriptor, widths)
return
def init_resources(self, resources):
self.resources = resources
self.fontmap = {}
self.xobjmap = {}
self.csmap = PREDEFINED_COLORSPACE.copy()
if not resources: return
def get_colorspace(spec):
if isinstance(spec, list):
name = literal_name(spec[0])
else:
name = literal_name(spec)
if name == 'ICCBased' and isinstance(spec, list) and 2 <= len(spec):
return PDFColorSpace(name, stream_value(spec[1])['N'])
elif name == 'DeviceN' and isinstance(spec, list) and 2 <= len(spec):
return PDFColorSpace(name, len(list_value(spec[1])))
else:
return PREDEFINED_COLORSPACE[name]
for (k,v) in list(dict_value(resources).items()):
if 2 <= self.debug:
print(('Resource: %r: %r' % (k,v)))
if k == 'Font':
for (fontid,spec) in list(dict_value(v).items()):
objid = None
if isinstance(spec, PDFObjRef):
objid = spec.objid
spec = dict_value(spec)
self.fontmap[fontid] = self.rsrcmgr.get_font(objid, spec)
elif k == 'ColorSpace':
for (csid,spec) in list(dict_value(v).items()):
self.csmap[csid] = get_colorspace(resolve1(spec))
elif k == 'ProcSet':
self.rsrcmgr.get_procset(list_value(v))
elif k == 'XObject':
for (xobjid,xobjstrm) in list(dict_value(v).items()):
self.xobjmap[xobjid] = xobjstrm
return
def __init__(self, rsrcmgr, spec):
try:
self.basefont = literal_name(spec["BaseFont"])
except KeyError:
if STRICT:
raise PDFFontError("BaseFont is missing")
self.basefont = "unknown"
try:
(descriptor, widths) = FontMetricsDB.get_metrics(self.basefont)
except KeyError:
descriptor = dict_value(spec.get("FontDescriptor", {}))
firstchar = int_value(spec.get("FirstChar", 0))
lastchar = int_value(spec.get("LastChar", 255))
widths = list_value(spec.get("Widths", [0] * 256))
widths = dict((i + firstchar, w) for (i, w) in enumerate(widths))
PDFSimpleFont.__init__(self, descriptor, widths, spec)
if "Encoding" not in spec and "FontFile" in descriptor:
# try to recover the missing encoding info from the font file.
self.fontfile = stream_value(descriptor.get("FontFile"))
length1 = int_value(self.fontfile["Length1"])
data = self.fontfile.get_data()[:length1]
parser = Type1FontHeaderParser(StringIO(data))
self.cid2unicode = parser.get_encoding()
return
def __init__(self, rsrcmgr, spec):
try:
self.basefont = literal_name(spec["BaseFont"])
except KeyError:
if STRICT:
raise PDFFontError("BaseFont is missing")
self.basefont = "unknown"
self.cidsysteminfo = dict_value(spec.get("CIDSystemInfo", {}))
self.cidcoding = "%s-%s" % (
self.cidsysteminfo.get("Registry", "unknown"),
self.cidsysteminfo.get("Ordering", "unknown"),
)
try:
name = literal_name(spec["Encoding"])
except KeyError:
if STRICT:
raise PDFFontError("Encoding is unspecified")
name = "unknown"
try:
self.cmap = CMapDB.get_cmap(name)
except CMapDB.CMapNotFound as e:
if STRICT:
raise PDFFontError(e)
self.cmap = CMap()
try:
descriptor = dict_value(spec["FontDescriptor"])
except KeyError:
if STRICT:
raise PDFFontError("FontDescriptor is missing")
descriptor = {}
ttf = None
if "FontFile2" in descriptor:
self.fontfile = stream_value(descriptor.get("FontFile2"))
ttf = TrueTypeFont(self.basefont, StringIO(self.fontfile.get_data()))
self.unicode_map = None
if "ToUnicode" in spec:
strm = stream_value(spec["ToUnicode"])
self.unicode_map = FileUnicodeMap()
CMapParser(self.unicode_map, StringIO(strm.get_data())).run()
elif self.cidcoding == "Adobe-Identity":
if ttf:
try:
self.unicode_map = ttf.create_unicode_map()
except TrueTypeFont.CMapNotFound:
pass
else:
try:
self.unicode_map = CMapDB.get_unicode_map(self.cidcoding, self.cmap.is_vertical())
except CMapDB.CMapNotFound as e:
pass
self.vertical = self.cmap.is_vertical()
if self.vertical:
# writing mode: vertical
widths = get_widths2(list_value(spec.get("W2", [])))
self.disps = dict((cid, (vx, vy)) for (cid, (_, (vx, vy))) in list(widths.items()))
(vy, w) = spec.get("DW2", [880, -1000])
self.default_disp = (None, vy)
widths = dict((cid, w) for (cid, (w, _)) in list(widths.items()))
default_width = w
else:
# writing mode: horizontal
self.disps = {}
self.default_disp = 0
widths = get_widths(list_value(spec.get("W", [])))
default_width = spec.get("DW", 1000)
PDFFont.__init__(self, descriptor, widths, default_width=default_width)
return
