Improve ImageGrab.grabclipboard() on Windows #4615
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radarhere
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May 28, 2020
Co-authored-by: Andrew Murray <3112309+radarhere@users.noreply.github.com>
radarhere
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Jun 14, 2020
| from . import BmpImagePlugin | ||
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| return BmpImagePlugin.DibImageFile(data) | ||
| return None |
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This might just be a curious question - why change this from return data to return None?
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It should be dead code in both cases, I just think None is a safer fallback then returning undefined data. If I had to guess, the original return was written in anticipation of implementing CF_HDROP support in C code, but I found it easier in Python.
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Helps #4611
Adds support for the following clipboard formats on Windows in addition to the already supported
CF_DIB:CF_DIBV5'PNG'used by e.g. MS Word 2016 and Paint.NET,CF_HDROPused by most browsers (except Chrome), file explorers, etc.Support for
CF_HDROPwas already hinted at in the documentation, but there was merely a FIXME in place of the code.Used format is selected out of available formats based on the priority specified by the clipboard owner.
While I could see the argument that CF_HDROP is more complicated and should therefore only be a fallback, based on my testing, it is almost always the preferred format, and preserves the original image data (e.g. transparency, tags, ...), unlike bitmaps.