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Title: Fix alpha handling when flattening images for vector backends by ayshih · Pull Request #32107 · matplotlib/matplotlib · GitHub

Open Graph Title: Fix alpha handling when flattening images for vector backends by ayshih · Pull Request #32107 · matplotlib/matplotlib

X Title: Fix alpha handling when flattening images for vector backends by ayshih · Pull Request #32107 · matplotlib/matplotlib

Description: matplotlib: plotting with Python. Contribute to matplotlib/matplotlib development by creating an account on GitHub.

Open Graph Description: PR summary This PR fixes two bugs when flattening images for vector backends and alpha is not 1. Image flattening is when the Agg resampler is used to flatten a sequence of images into a single i...

X Description: PR summary This PR fixes two bugs when flattening images for vector backends and alpha is not 1. Image flattening is when the Agg resampler is used to flatten a sequence of images into a single i...

Opengraph URL: https://github.com/matplotlib/matplotlib/pull/32107

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og:image:altPR summary This PR fixes two bugs when flattening images for vector backends and alpha is not 1. Image flattening is when the Agg resampler is used to flatten a sequence of images into a single i...
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Fix alpha handling when flattening images for vector backendshttps://Github.com/matplotlib/matplotlib/pull/32107#top
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Jul 23, 2026https://Github.com/matplotlib/matplotlib/pull/32107#issue-4960520633
Please reload this pagehttps://Github.com/matplotlib/matplotlib/pull/32107
Agg alpha image compositor differs from Matplotlib's software image compositor #8847https://github.com/matplotlib/matplotlib/issues/8847
Filter images in premultiplied alpha mode. #29776https://github.com/matplotlib/matplotlib/pull/29776
Fixed inaccurate image placement and even more resampling bugs #31021https://github.com/matplotlib/matplotlib/pull/31021
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topic: images https://Github.com/matplotlib/matplotlib/issues?q=state%3Aopen%20label%3A%22topic%3A%20images%22
Jul 23, 2026https://Github.com/matplotlib/matplotlib/pull/32107#event-28391455559
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topic: color/alpha https://Github.com/matplotlib/matplotlib/issues?q=state%3Aopen%20label%3A%22topic%3A%20color%2Falpha%22
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Fix bug with applying alpha twicehttps://Github.com/matplotlib/matplotlib/pull/32107/commits/453b25218350d34f8c4d1ed3df140a90ee5d6182
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Fix missing premultiplication before using the Agg resamplerhttps://Github.com/matplotlib/matplotlib/pull/32107/commits/571db7166dac3e7fa28685fee9c953c783168a37
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July 23, 2026 18:39https://Github.com/matplotlib/matplotlib/pull/32107#event-28399073833
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topic: color/alpha https://Github.com/matplotlib/matplotlib/issues?q=state%3Aopen%20label%3A%22topic%3A%20color%2Falpha%22
topic: images https://Github.com/matplotlib/matplotlib/issues?q=state%3Aopen%20label%3A%22topic%3A%20images%22
Agg alpha image compositor differs from Matplotlib's software image compositor https://github.com/matplotlib/matplotlib/issues/8847
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