64bit Access Error

[glitchassassin]

From @jazz1215:

Is there any chance that this issue relates to 32bit or 64bit Python?

I have 2 PCs, one with 32bit Python 2.7.12 and the other with 64bit Python 2.7.12 installed. Both have latest 0.5.2 Lackey installed with pip.

On the machine with 32bit, a failed Find will raise FindFailed exception, which is good. However, on the machine with 64bit Python, a "WIndowsError: exception access violation reading 0x0000000C00000000" will be raised. Please see below for details:

32Bit Python:
Python Version:
2.7.12 (v2.7.12:d33e0cf91556, Jun 27 2016, 15:19:22) [MSC v.1500 32 bit (Intel)]

Error:
[info] Couldn't find 'c:\testimage.png' with enough similarity.
Traceback (most recent call last):
  File "C:\guitest.py", line 11, in <module>
    print find(r'c:\testimage.png')
  File "C:\Python27\lib\site-packages\lackey\RegionMatching.py", line 386, in find
    raise FindFailed("Could not find pattern '{}'".format(path))
lackey.Exceptions.FindFailed: Could not find pattern 'c:\testimage.png'

64Bit Python
Python Version:
2.7.12 (v2.7.12:d33e0cf91556, Jun 27 2016, 15:24:40) [MSC v.1500 64 bit (AMD64)]

Exception:
Traceback (most recent call last):
  File "E:\guitest.py", line 11, in <module>
    print find(r'E:\testimage.png')
  File "E:\3rdParty\Python-2.7.12\lib\site-packages\lackey\RegionMatching.py", line 383, in find
    match = self.exists(pattern)
  File "E:\3rdParty\Python-2.7.12\lib\site-packages\lackey\RegionMatching.py", line 528, in exists
    matcher = TemplateMatcher(r.getBitmap())
  File "E:\3rdParty\Python-2.7.12\lib\site-packages\lackey\RegionMatching.py", line 349, in getBitmap
    return PlatformManager.getBitmapFromRect(self.x, self.y, self.w, self.h)
  File "E:\3rdParty\Python-2.7.12\lib\site-packages\lackey\PlatformManagerWindows.py", line 348, in getBitmapFromRect
    img = self._getVirtualScreenBitmap()
  File "E:\3rdParty\Python-2.7.12\lib\site-packages\lackey\PlatformManagerWindows.py", line 577, in _getVirtualScreenBitmap
    img = self._captureScreen(monitors[monitor_id]["name"])
  File "E:\3rdParty\Python-2.7.12\lib\site-packages\lackey\PlatformManagerWindows.py", line 438, in _captureScreen
    hdc = self._gdi32.CreateDCA(ctypes.c_char_p(device_name), 0, 0, 0)
WindowsError: exception: access violation reading 0x0000000C00000000

[glitchassassin]

ctypes expects 32-bit pointers by default. 64-bit pointers must be defined explicitly.

If that's all the issue is, this should be a pretty straightforward fix. I'll set up Python 3 x64 and test.

[glitchassassin]

I have pushed these changes to the develop branch and verified that the unit tests now work in 64-bit Python. I'll roll out a new release a little later this week.

[glitchassassin]

This has been fixed in the latest release.