def insert_xobject(stack: PDFStateStack, xobjid) -> PDFStateStack:
xobjid = literal_name(xobjid)
try:
xobj = PDFStream.validated_stream(stack.xobjmap[xobjid])
except KeyError:
raise InvalidOperation('Undefined xobject id: %r' % xobjid)
# log.info('Processing xobj: %r', xobj)
subtype = xobj.get('Subtype')
if subtype is LITERAL_FORM and 'BBox' in xobj:
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.
xobjres = xobj.get('Resources')
resources = dict_value(xobjres) if xobjres else stack.resources.copy()
stack.complete_layout_items.append(
make_xobject(obj=xobj,
bbox=bbox,
ctm=stack.t_matrix,
matrix=matrix,
resources=resources))
elif subtype is LITERAL_IMAGE and 'Width' in xobj and 'Height' in xobj:
stack.complete_layout_items.append(make_image(xobj, stack.t_matrix))
else:
# unsupported xobject type.
pass
return stack
def __init__(self, spec):
try:
self.basefont = literal_name(spec['BaseFont'])
except KeyError:
if settings.STRICT:
raise FontError('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 = PDFStream.validated_stream(
descriptor.get('FontFile'))
length1 = int_value(self.fontfile['Length1'])
data = self.fontfile.get_data()[:length1]
parser = Type1FontHeaderParser(BytesIO(data))
self.cid2unicode = parser.get_encoding()
return
def init_resources(state: PDFStateStack, font_cache: dict = {}):
for (k, v) in iter(dict_value(state.resources).items()):
# log.debug('Resource: %r: %r', k, v)
if k == 'Font':
for (fontid, spec) in iter(dict_value(v).items()):
objid = None
if isinstance(spec, PDFObjRef):
objid = spec.objid
spec = dict_value(spec)
state.fontmap[fontid] = get_font(objid, spec, font_cache)
elif k == 'ColorSpace':
for (csid, spec) in iter(dict_value(v).items()):
state.colorspace_map[csid] = get_colorspace(resolve1(spec))
elif k == 'ProcSet':
get_procset(list_value(v))
elif k == 'XObject':
for (xobjid, xobjstrm) in iter(dict_value(v).items()):
state.xobjmap[xobjid] = xobjstrm
def __init__(self, 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 get_font(objid: int, spec: dict, cached_fonts: dict = {}):
if objid and objid in cached_fonts:
font = cached_fonts[objid]
else:
log.debug('get_font: create: objid=%r, spec=%r', objid, spec)
if settings.STRICT:
if spec['Type'] is not LITERAL_FONT:
raise FontError('Type is not /Font')
# Create a Font object.
if 'Subtype' in spec:
subtype = literal_name(spec['Subtype'])
else:
if settings.STRICT:
raise FontError('Font Subtype is not specified.')
subtype = 'Type1'
if subtype in ('Type1', 'MMType1'):
# Type1 Font
font = PDFType1Font(spec)
elif subtype == 'TrueType':
# TrueType Font
font = PDFTrueTypeFont(spec)
elif subtype == 'Type3':
# Type3 Font
font = PDFType3Font(spec)
elif subtype in ('CIDFontType0', 'CIDFontType2'):
# CID Font
font = PDFCIDFont(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 = get_font(None, subspec, cached_fonts)
else:
if settings.STRICT:
raise FontError('Invalid Font spec: %r' % spec)
font = PDFType1Font(spec) # this is so wrong!
if objid:
cached_fonts[objid] = font
return font
def __init__(self, spec, strict=settings.STRICT):
try:
self.basefont = literal_name(spec['BaseFont'])
except KeyError:
if strict:
raise FontError('BaseFont is missing')
self.basefont = 'unknown'
self.cidsysteminfo = dict_value(spec.get('CIDSystemInfo', {}))
self.cidcoding = '%s-%s' % (
resolve1(self.cidsysteminfo.get('Registry',
b'unknown')).decode("latin1"),
resolve1(self.cidsysteminfo.get('Ordering',
b'unknown')).decode("latin1"))
try:
name = literal_name(spec['Encoding'])
except KeyError:
if strict:
raise FontError('Encoding is unspecified')
name = 'unknown'
try:
self.cmap = CMapDB.get_cmap(name)
except CMapNotFound as e:
if strict:
raise FontError(e)
self.cmap = CMap()
try:
descriptor = dict_value(spec['FontDescriptor'])
except KeyError:
if strict:
raise FontError('FontDescriptor is missing')
descriptor = {}
ttf = None
if 'FontFile2' in descriptor:
self.fontfile = PDFStream.validated_stream(
descriptor.get('FontFile2'))
ttf = TrueTypeFont(self.basefont,
BytesIO(self.fontfile.get_data()))
self.unicode_map = None
if 'ToUnicode' in spec:
strm = PDFStream.validated_stream(spec['ToUnicode'])
self.unicode_map = FileUnicodeMap()
CMapParser(self.unicode_map, BytesIO(strm.get_data())).run()
elif self.cidcoding in ('Adobe-Identity', 'Adobe-UCS'):
if ttf:
try:
self.unicode_map = ttf.create_unicode_map()
except CMapNotFound:
pass
else:
try:
self.unicode_map = CMapDB.get_unicode_map(
self.cidcoding, self.cmap.is_vertical())
except 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 iter(widths.items()))
(vy, w) = spec.get('DW2', [880, -1000])
self.default_disp = (None, vy)
widths = dict((cid, w) for (cid, (w, _)) in iter(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