def read(cls, fp, encoding='macroman'):
signature, key = read_fmt('4sH', fp)
try:
key = ImageResourceID(key)
except ValueError:
if ImageResourceID.is_path_info(key):
logger.debug('Undefined PATH_INFO found: %d' % (key))
elif ImageResourceID.is_plugin_resource(key):
logger.debug('Undefined PLUGIN_RESOURCE found: %d' % (key))
else:
logger.warning('Unknown image resource %d' % (key))
name = read_pascal_string(fp, encoding, padding=2)
raw_data = read_length_block(fp, padding=2)
if key in TYPES:
data = TYPES[key].frombytes(raw_data)
# try:
# _raw_data = data.tobytes(padding=1)
# assert _raw_data == raw_data, '%r vs %r' % (
# _raw_data, raw_data
# )
# except AssertionError as e:
# logger.error(e)
# raise
else:
data = raw_data
return cls(signature, key, name, data)
def __repr__(self):
return "ImageResource(%r %s, %r, %s)" % (
self.resource_id,
ImageResourceID.name_of(self.resource_id),
self.name,
trimmed_repr(self.data),
)
def image_resource_blocks(self):
"""Returns dict of the underlying image resource blocks."""
if not self._image_resource_blocks:
self._image_resource_blocks = {
ImageResourceID.name_of(block.resource_id).lower(): block.data
for block in self.decoded_data.image_resource_blocks
}
return self._image_resource_blocks
def parse_image_resource(resource):
"""
Replaces ``data`` of image resource block with a parsed data structure.
"""
if not ImageResourceID.is_known(resource.resource_id):
warnings.warn("Unknown resource_id (%s)" % resource.resource_id)
decoder = _image_resource_decoders.get(resource.resource_id, lambda data: data)
return resource._replace(data = decoder(resource.data))
def parse_image_resource(resource):
"""
Replaces ``data`` of image resource block with a parsed data structure.
"""
if not ImageResourceID.is_known(resource.resource_id):
warnings.warn("Unknown resource_id (%s)" % resource.resource_id)
decoder = _image_resource_decoders.get(resource.resource_id,
lambda data: data)
return resource._replace(data=decoder(resource.data))
def _repr_pretty_(self, p, cycle):
if cycle:
p.text(repr(self))
else:
with p.group(0, 'ImageResource(', ')'):
p.text("%r %s, %r, " % (
self.resource_id, ImageResourceID.name_of(self.resource_id),
self.name
))
if isinstance(self.data, bytes):
p.text(trimmed_repr(self.data))
else:
p.pretty(self.data)
def image_resource_blocks(self):
"""
Returns dict of the underlying image resource blocks. See
:py:mod:`psd_tools.decoder.image_resources`
:rtype: `dict`
"""
if not self._image_resource_blocks:
self._image_resource_blocks = {
ImageResourceID.name_of(block.resource_id).lower(): block.data
for block in self.decoded_data.image_resource_blocks
}
return self._image_resource_blocks
def parse_image_resource(resource):
"""
Replaces ``data`` of image resource block with a parsed data structure.
"""
if not ImageResourceID.is_known(resource.resource_id):
warnings.warn("Unknown resource_id (%s)" % resource.resource_id)
if (ImageResourceID.PATH_INFO_0 <= resource.resource_id and
ImageResourceID.PATH_INFO_LAST >= resource.resource_id):
decoder = decode_path_resource
else:
decoder = _image_resource_decoders.get(resource.resource_id,
lambda data: data)
return resource._replace(data=decoder(resource.data))
def _read_block(fp, encoding):
"""
Reads single image resource block. Such blocks contain non-pixel data
for the images (e.g. pen tool paths).
"""
sig = fp.read(4)
if not sig in (b'8BIM', b'MeSa'):
raise Error("Invalid resource signature (%r)" % sig)
resource_id = read_fmt("H", fp)[0]
name = read_pascal_string(fp, encoding, 2)
data_size = pad(read_fmt("I", fp)[0], 2)
if not data_size:
logger.debug(
"Found image resource with no data (%d %s). Dropping..." % (
resource_id, ImageResourceID.name_of(resource_id)
))
return None
data = fp.read(data_size)
return ImageResource(resource_id, name, data)
def __repr__(self):
return "ImageResource(%r %s, %r, %s)" % (
self.resource_id, ImageResourceID.name_of(
self.resource_id), self.name, trimmed_repr(self.data))
