Make `.quantize(palette=...)` use exact colors when possible - #9829

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akx wants to merge 10 commits into

python-pillow:mainfrom

akx:palettize-fixes

Commits on Aug 10, 2026

Improve docs for Image.quantize()
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4a31011
Add documentation for ImagingError_MemoryError
akx
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a71c403
Document palette constraints better; use constants
akx
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887f18e
Refactor: move topalette to separate file
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457f78b
Split topalette converter functions for less nesting
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b9d807f
Fix possible null pointer derefs in topalette()
akx
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f0e46bc
Make to-palette conversion use exact colors if available
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f108680
Apply hoist and restrict optimizations to palettization
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098aa0e
Move palette cache functions to ConvertToPalette.c
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d3d4718

Commits on Aug 11, 2026

Use palette cache to figure out if we might have an exact match
akx
committed
7fa4a06