Avoid an extra copy/resample if imshow input has no alpha #27562
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jklymak
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Dec 23, 2023
This is probably the best we can do to fix matplotlib#27554 at this time, without delving into re-writing the Agg resampler (which, as the Python code notes, does require RGBA.)
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PR summary
This is probably the best we can do to fix #27554 at this time, without delving into re-writing the Agg resampler (which, as the Python code notes, does require RGBA.)
Also adds a test, as it appears that nothing checked an RGB input with transparent
alpha(and my original suggestion from #27554 (comment) using 255/1.0 passed tests even though it didn't work.)PR checklist