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Hopefully corrected bpp issue with older .cur

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This commit is contained in:
jlwoolf 2022-09-21 22:28:13 -06:00
parent 569feeec12
commit 69b4ebf89b
1 changed files with 8 additions and 4 deletions
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12
src/PIL/CurImagePlugin.py
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@ -113,8 +113,6 @@ def _accept(prefix):
##
# Image plugin for Windows Cursor files.
class CurFile(IcoImagePlugin.IcoFile):
def __init__(self, buf):
"""
@ -152,11 +150,17 @@ class CurFile(IcoImagePlugin.IcoFile):
if not icon_header[j]:
icon_header[j] = 256
# cursor files have transparency, hence 32 bpp
icon_header["bpp"] = 32
icon_header["dim"] = (icon_header["width"], icon_header["height"])
icon_header["square"] = icon_header["width"] * icon_header["height"]
# TODO: This needs further investigation. Cursor files do not really specify their bpp
# like ICO's as those bits are used for the y_hotspot. For now, bpp is calculated by
# subtracting the AND mask (equal to number of pixels * 1bpp) and dividing by the number
# of pixels.
BITMAP_INFO_HEADER_SIZE = 40
icon_header["bpp"] = (icon_header["size"] - BITMAP_INFO_HEADER_SIZE) * 8 - (icon_header["square"]) // icon_header["square"]
self.entry.append(icon_header)
self.entry = sorted(self.entry, key=lambda x: x["square"])