Closed
Bug 84979
Opened 24 years ago
Closed 24 years ago
PNG RGB binary transparency is broken
Categories
(Core :: Graphics: ImageLib, defect)
Tracking
()
People
(Reporter: jason1, Assigned: pavlov)
References
()
Details
Test images (T8) and (T9) at the listed URL are rendered incorrectly. The
right half of the images should be completely transparent, but it is displayed
as a reddish version of the background image. The problem is completely
reproducible; observed in build 2001060908.
These are 24-bit RGB images that include a tRNS chunk to indicate that one
specific RGB color should be transparent.
The exact behavior is somewhat complicated -- the displayed red value is always
either 63, 127, 191, or 255, and the green and blue values are either correct or
128 too high. The behavior for 48-bit RGB images is slightly different in the
red component -- it will be either correct or 64 too high.
This is a regression. It used to work perfectly.
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Comment 1•24 years ago
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*** This bug has been marked as a duplicate of 84980 ***
Status: UNCONFIRMED → RESOLVED
Closed: 24 years ago
Resolution: --- → DUPLICATE
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Description
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