RenderScript Impl of Box Shadow #43988
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This pull request was exported from Phabricator. Differential Revision: D55896447 |
Differential Revision: D55565035
Differential Revision: D55563775
Differential Revision: D55635743
Summary: Pull Request resolved: facebook#43722 This change adds a drawable, when when drawn on the bounds of a border-box sized view, will draw a spec compliant box-shadow outside the box. This is reliant on Android `RenderNode` and `RenderEffect` APIs provided by API 31. Inset box shadows can also be added using a similar method, but this is not done yet. The code which manages this is in flux, but the underlying drawable should be good. Will add some tests once it's more wired up. Changelog: [Internal] Differential Revision: D55561465 Reviewed By: joevilches
Summary: Pull Request resolved: facebook#43988 The supported path for blur composition effects on API 31+ is RenderNode, but that is pretty new. This adds a RendderScript path, deprecated for newer versions of Android. We still need API 26+ for clipOutPath (we need to clip original BG out of shadow, e.g. for transparent BG), but this should be supported in many more places. It is not perfect. RenderScript's built-in blur implementation has a maximum physical pixel radius of 25px. On an xxhdpi device, this means shadows stop getting larger after ~8 CSS pixels. I also think this path can end up with blurry bitmaps if scale transform enlarged, unlike RenderNode path. I think this is probably an acceptable degradation path for older devices, and probably not work home-rolling more complex RenderScript shaders. We should potentially add an OS API level check on the JS side with a dev time warning. We don't have RenderScript path for blur filter yet, which I imagine might end up stealing some of this code later. Changelog: [Internal] Differential Revision: D55896447
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This pull request was exported from Phabricator. Differential Revision: D55896447 |
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Summary:
The supported path for blur composition effects on API 31+ is RenderNode, but that is pretty new.
This adds a RendderScript path, deprecated for newer versions of Android.
We still need API 26+ for clipOutPath (we need to clip original BG out of shadow, e.g. for transparent BG), but this should be supported in many more places.
It is not perfect. RenderScript's built-in blur implementation has a maximum physical pixel radius of 25px. On an xxhdpi device, this means shadows stop getting larger after ~8 CSS pixels. I also think this path can end up with blurry bitmaps if scale transform enlarged, unlike RenderNode path.
I think this is probably an acceptable degradation path for older devices, and probably not work home-rolling more complex RenderScript shaders. We should potentially add an OS API level check on the JS side with a dev time warning.
We don't have RenderScript path for blur filter yet, which I imagine might end up stealing some of this code later.
Changelog: [Internal]
Differential Revision: D55896447