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2020年5月31日

So, this is happening with a Pixel 3 XL with Android 10, but not on a Pixel 4 XL with Android 11. Here's what's happening:

引用ツイート

Ice universe

@UniverseIce

2020年5月31日

WARNING！！！ Never set this picture as wallpaper, especially for Samsung mobile phone users! It will cause your phone to crash! Don't try it! If someone sends you this picture, please ignore it.

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2020年5月31日

The following image shows the stack trace of the crash of SystemUI. This basically means it's happening in "getHistogram".

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2020年5月31日

After digging into getHistogram for both devices, and the functions calling getHistogram... I noticed this. The first image is from the Pixel 3 XL, while the second is from the Pixel 4 XL. On the Pixel 4 XL, there's a new parameter for the function peekWallpaperBitmap.

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2020年5月31日

I won't show everything, but basically, the function doColorManagement of the ColorManagementProxy is called at some point. This function checks if the Color Space of the image is supported by the device. The image is supported by default if its color space is SRGB, or...

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2020年5月31日

... if the current display supports it. If it isn't supported, it will replace the Color Space of the image to SRGB, and it will log its current Color Space. This is why it doesn't crash on the Pixel 4 XL. However, on the Pixel 3 XL with Android 10...

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2020年5月31日

...this is not verified. This means that an image with a Color Space that isn't supported will likely cause a crash on that device if it is set as the wallpaper. So what's the Color Space of this image? RGB.

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Thanks to

, we now have a better explanation of what's going on.

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Romain Guy

@romainguy

2020年6月3日

返信先: @evowizzさん

RGB is a color model, not a color space. Non-sRGB color spaces doesn't mean values outside of the 0..255 range. This is a separate thing as well. What is more likely a simply a rounding error either in the color space conversion or in the luma conversion done for the histogram

午後8:13 · 2020年6月3日

件のリツイート

件のいいね