Tofu on android for (some) monospaced Unicode subscripts
Reported by
shreeva...@gmail.com,
Sep 13 2017
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Issue descriptionExample URL: https://tex.stackexchange.com/a/391131/48 Steps to reproduce the problem: 1. Visit a page containing text like x₀x₁x₂x₃x₄x₅x₆x₇x₈x₉ in a monospace font, on Android Chrome. For example the link above, or the following page: <!DOCTYPE html> <html> <head> <meta charset="utf-8"> </head> <body> <p>x₀x₁x₂x₃x₄x₅x₆x₇x₈x₉</p> <p><tt>x₀x₁x₂x₃x₄x₅x₆x₇x₈x₉</tt></p> </body> </html> hosted at https://shreevatsa.github.io/pages/public/test.html What is the expected behavior? All characters are displayed, using fonts available on the system. What went wrong? Some of the subscript characters are not rendered; they get replaced by boxes (tofu). (For the minimal example above https://shreevatsa.github.io/pages/public/test.html it happens for all characters, but at https://tex.stackexchange.com/a/391131/48 which has more CSS etc., for some reason it happens only for 1 and 5... and later down the page, for 2 too.) Does it occur on multiple sites: Yes Is it a problem with a plugin? No Did this work before? N/A Does this work in other browsers? Yes Chrome version: 61.0.3163.81 Channel: n/a OS Version: 7.0.0; SM-G920V Build/NRD90M Flash Version: - Works fine in Firefox on Android - Works fine in Chrome on desktop (Mac) - The non-monospaced text works fine in Chrome on Android
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Sep 13 2017
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Sep 14 2017
Able to reproduce the issue in Android. This seems to be a Non-Regression issue as same behavior is seen since M58. Steps Followed 1. Launched Browser 2. Navigated to https://shreevatsa.github.io/pages/public/test.html 3. Observed the numbers are not displaying properly as per the Chrome screenshot in original comment. Chrome versions tested 61.0.3163.81 63.0.3214.0 OS Android 8.0.0, 7.1.2, 6.0.1 Android Devices Pixel Build/OPR1 170623.027 One Plus2; ONE A2003 Build/MMB29M Pixel XL Note: Issue is not observed in desktop (Linux, Windows and Mac). Thanks!!
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Sep 14 2017
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Sep 15 2017
Likely due to a lack of suitable fonts on Android.
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Sep 15 2017
Note that it is displayed fine in Firefox on Android. I imagine that Firefox and Chrome both have access to the same set of fonts.
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Sep 15 2017
Also, I find it hard to imagine that there may be a font that contains ₂ ₃ ₄ but not ₁ and ₅ nor that ₂ is displayed once but not again later (see the screenshot Chrome.Android.2.png attached in the original report).
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Sep 15 2017
Here's a better test file, hosted at https://shreevatsa.github.io/pages/public/test2.html: <!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"/> <meta name="viewport" content="width=device-width, initial-scale=1.0"> </head> <body> <pre> x₀₀ x₀₁ x₀₂ x₀₃ x₀₄ x₀₅ x₀₆ x₀₇ x₀₈ x₀₉ x₁₀ x₁₁ x₁₂ x₁₃ x₁₄ x₁₅ x₁₆ x₁₇ x₁₈ x₁₉ x₂₀ x₂₁ x₂₂ x₂₃ x₂₄ x₂₅ x₂₆ x₂₇ x₂₈ x₂₉ x₃₀ x₃₁ x₃₂ x₃₃ x₃₄ x₃₅ x₃₆ x₃₇ x₃₈ x₃₉ x₄₀ x₄₁ x₄₂ x₄₃ x₄₄ x₄₅ x₄₆ x₄₇ x₄₈ x₄₉ x₅₀ x₅₁ x₅₂ x₅₃ x₅₄ x₅₅ x₅₆ x₅₇ x₅₈ x₅₉ x₆₀ x₆₁ x₆₂ x₆₃ x₆₄ x₆₅ x₆₆ x₆₇ x₆₈ x₆₉ x₇₀ x₇₁ x₇₂ x₇₃ x₇₄ x₇₅ x₇₆ x₇₇ x₇₈ x₇₉ x₈₀ x₈₁ x₈₂ x₈₃ x₈₄ x₈₅ x₈₆ x₈₇ x₈₈ x₈₉ x₉₀ x₉₁ x₉₂ x₉₃ x₉₄ x₉₅ x₉₆ x₉₇ x₉₈ x₉₉ </pre> </body> </html> Hosted at https://shreevatsa.github.io/pages/public/test2.html The renderings on Android by Firefox and by Chrome are attached here. Note that in Chrome, subscript digits 2, 3, 4 are displayed, but only if not preceded by another subscript digit 0–1 or 5–9.
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Oct 12 2017
Please navigate to below link for log's and video-- go/chrome-androidlogs/764754 Thanks!! |
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Comment 1 by dtapu...@chromium.org
, Sep 13 2017