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Canvas arcTo draws an inconsistent arc
Reported by
alexnegr...@gmail.com,
Oct 16 2016
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Issue descriptionSteps to reproduce the problem: 1. Open the following page from Chrome, on an Android device: https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/arcTo 2. View the arcTo demo (second one) What is the expected behavior? The arc should be smooth, just like on desktop Chrome. What went wrong? The arc is not consistent, the line being drawn is not continuous. Did this work before? Yes Pretty sure it worked on Chrome 50 Chrome version: 52.0.2743.98 Channel: stable OS Version: 4.4.4 Flash Version: I observed this issue by using the Crosswalk Webview. This issue was not present on older Crosswalk builds, so it is probably a regression. Thanks.
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Oct 17 2016
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Oct 17 2016
alexnegrila89@: could you please update chrome to latest chrome version (M53), and then do a screenshot, I tested on my nexus 5x, and it seems to be the same as displayed on desktop.
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Oct 18 2016
And here's how the elipse demo looks like: https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/ellipse
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Oct 18 2016
alexnegrila89@: could you provide a little more about hardware? What is the model of the device? Also, I'd appreciate if you could go to chrome://gpu page and do a screenshot.
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Oct 18 2016
Yes, I found this issue on a Samsung Galaxy S4 Mini and a Sony Xperia M2 http://www.gsmarena.com/samsung_galaxy_s4_mini_i9195i-7468.php http://www.gsmarena.com/sony_xperia_m2-6146.php Both running Android 4.4.4. I could also test a Samsung Galaxy S7 Edge tomorrow. One thing I noticed is that, the Sony had Chrome 47, and the issue was there. However, I am using Crosswalk for my app, at version 17, which is based on Chromium 47, and the issue is not present. I attached the info written in chrome://gpu
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Oct 19 2016
I can confirm everything is OK on a Samsung Galaxy S7 Edge, running Android 6.0.1 and Chrome 53
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Oct 19 2016
OK, thanks for confirming. I will investigate.
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Nov 8 2016
senorblanco@: could you help take a look at this? It seems to be hardware specific or Android OS specific. Or could it be a gpu driver-related issue?
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Nov 9 2016
OK, I can actually repro this on Nexus 7. It is the same as this bug: https://bugs.chromium.org/p/chromium/issues/detail?id=555779 |
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Comment 1 by dtapu...@chromium.org
, Oct 16 2016