106 lines
2.7 KiB
Python
106 lines
2.7 KiB
Python
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"""
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PIL-based formats to take screenshots and grab from the clipboard.
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"""
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import threading
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import numpy as np
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from ..core import Format
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class BaseGrabFormat(Format):
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"""Base format for grab formats."""
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_pillow_imported = False
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_ImageGrab = None
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def __init__(self, *args, **kwargs):
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super(BaseGrabFormat, self).__init__(*args, **kwargs)
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self._lock = threading.RLock()
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def _can_write(self, request):
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return False
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def _init_pillow(self):
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with self._lock:
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if not self._pillow_imported:
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self._pillow_imported = True # more like tried to import
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import PIL
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if not hasattr(PIL, "__version__"): # pragma: no cover
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raise ImportError("Imageio Pillow requires " "Pillow, not PIL!")
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try:
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from PIL import ImageGrab
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except ImportError:
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return None
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self._ImageGrab = ImageGrab
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return self._ImageGrab
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class Reader(Format.Reader):
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def _open(self):
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pass
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def _close(self):
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pass
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def _get_data(self, index):
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return self.format._get_data(index)
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class ScreenGrabFormat(BaseGrabFormat):
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"""The ScreenGrabFormat provided a means to grab screenshots using
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the uri of "<screen>".
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This functionality is provided via Pillow. Note that "<screen>" is
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only supported on Windows and OS X.
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Parameters for reading
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----------------------
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No parameters.
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"""
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def _can_read(self, request):
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if request.filename != "<screen>":
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return False
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return bool(self._init_pillow())
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def _get_data(self, index):
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ImageGrab = self._init_pillow()
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assert ImageGrab
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pil_im = ImageGrab.grab()
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assert pil_im is not None
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im = np.asarray(pil_im)
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return im, {}
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class ClipboardGrabFormat(BaseGrabFormat):
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"""The ClipboardGrabFormat provided a means to grab image data from
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the clipboard, using the uri "<clipboard>"
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This functionality is provided via Pillow. Note that "<clipboard>" is
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only supported on Windows.
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Parameters for reading
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----------------------
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No parameters.
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"""
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def _can_read(self, request):
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if request.filename != "<clipboard>":
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return False
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return bool(self._init_pillow())
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def _get_data(self, index):
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ImageGrab = self._init_pillow()
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assert ImageGrab
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pil_im = ImageGrab.grabclipboard()
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if pil_im is None:
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raise RuntimeError(
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"There seems to be no image data on the " "clipboard now."
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)
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im = np.asarray(pil_im)
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return im, {}
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