def __init__(self):
self.__dll__ = ctypes.windll.LoadLibrary('tests/demo_dll.dll')
filter_func_type = ctypes.WINFUNCTYPE(ctypes.c_int16,
ctypes.POINTER(image_data))
filter_func_type.memsync = [{
'p': [0, 'data'],
'l': ([0, 'width'], [0, 'height']),
'f': 'lambda x, y: x * y',
't': 'c_int16'
}]
self.__apply_filter_to_image__ = self.__dll__.apply_filter_to_image
self.__apply_filter_to_image__.argtypes = (ctypes.POINTER(image_data),
ctypes.POINTER(image_data),
filter_func_type)
self.__apply_filter_to_image__.memsync = [{
'p': [0, 'data'],
'l': ([0, 'width'], [0, 'height']),
'f':
'lambda x, y: x * y',
't':
'c_int16'
}, {
'p': [1, 'data'],
'l': ([1, 'width'], [1, 'height']),
'f':
'lambda x, y: x * y',
't':
'c_int16'
}]
@filter_func_type
def filter_edge_detection(in_buffer):
filter_matrix = [[0, 1, 0], [1, -4, 1], [0, 1, 0]]
width = in_buffer.contents.width
height = in_buffer.contents.height
assert width == 3 and height == 3
in_matrix = self.array_to_matrix(
ctypes.cast(in_buffer.contents.data,
ctypes.POINTER(ctypes.c_int16 *
(width * height))).contents[:],
width, height)
out_value = 0
for matrix_line, filter_line in zip(in_matrix, filter_matrix):
out_value += sum(
[a * b for a, b in zip(matrix_line, filter_line)])
return out_value
self.__filter_edge_detection__ = filter_edge_detection
def __init__(self):
self.__dll__ = ctypes.windll.LoadLibrary('tests/demo_dll.dll')
conveyor_belt = ctypes.WINFUNCTYPE(ctypes.c_int16, ctypes.c_int16)
self.__use_optional_callback__ = self.__dll__.use_optional_callback_a
self.__use_optional_callback__.argtypes = (ctypes.c_int16,
conveyor_belt)
self.__use_optional_callback__.restype = ctypes.c_int16
@conveyor_belt
def process_data(in_data):
return in_data**2
self.__process_data__ = process_data
def __init__(self):
self.__dll__ = ctypes.windll.LoadLibrary('tests/demo_dll.dll')
conveyor_belt = ctypes.WINFUNCTYPE(ctypes.c_int16, ctypes.c_int16)
self.__sum_elements_from_callback__ = self.__dll__.sum_elements_from_callback
self.__sum_elements_from_callback__.argtypes = (ctypes.c_int16,
conveyor_belt)
self.__sum_elements_from_callback__.restype = ctypes.c_int16
self.DATA = [1, 6, 8, 4, 9, 7, 4, 2, 5, 2]
@conveyor_belt
def get_data(index):
print((index, self.DATA[index]))
return self.DATA[index]
self.__get_data__ = get_data
import ctypes
else:
raise # TODO unsupported platform
# +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
# RUN
# +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
if __name__ == '__main__':
DATA = [1, 6, 8, 4, 9, 7, 4, 2, 5, 2]
conveyor_belt = ctypes.WINFUNCTYPE(ctypes.c_int16, ctypes.c_int16)
@conveyor_belt
def get_data(index):
print((index, DATA[index]))
return DATA[index]
dll = ctypes.windll.LoadLibrary('demo_dll.dll')
sum_elements_from_callback = dll.sum_elements_from_callback
sum_elements_from_callback.argtypes = (ctypes.c_int16, conveyor_belt)
sum_elements_from_callback.restype = ctypes.c_int16
test_sum = sum_elements_from_callback(len(DATA), get_data)
print(('sum', 48, test_sum))
# +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++