def __repr__(self):
if self._cdata:
s = "<leptonica.Pix image size={0}x{1} depth={2}{4} at 0x{3:x}>"
return s.format(
self._cdata.w,
self._cdata.h,
self._cdata.d,
int(ffi.cast('intptr_t', self._cdata)),
'(colormapped)' if self._cdata.colormap else '',
)
else:
return "<leptonica.Pix image NULL>"
def _repr_png_(self):
"""iPython display hook
returns png version of image
"""
data = ffi.new('l_uint8 **')
size = ffi.new('size_t *')
err = lept.pixWriteMemPng(data, size, self._cdata, 0)
if err != 0:
raise LeptonicaIOError("pixWriteMemPng")
char_data = ffi.cast('char *', data[0])
return ffi.buffer(char_data, size[0])[:]
def __getstate__(self):
data = ffi.new('l_uint32 **')
size = ffi.new('size_t *')
err = lept.pixSerializeToMemory(self._cdata, data, size)
if err != 0:
raise LeptonicaIOError("pixSerializeToMemory")
char_data = ffi.cast('char *', data[0])
# Copy from C bytes to python bytes()
data_bytes = ffi.buffer(char_data, size[0])[:]
# Can now free C bytes
lept.lept_free(char_data)
return dict(data=data_bytes)
def __setstate__(self, state):
cdata_bytes = ffi.new('char[]', state['data'])
cdata_uint32 = ffi.cast('l_uint32 *', cdata_bytes)
pix = lept.pixDeserializeFromMemory(cdata_uint32, len(state['data']))
Pix.__init__(self, pix)