mapbox/mapbox-gl-js

When a character from custom font is not found.

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#12,975 opened on 2023年11月16日

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feature :green_apple:good first issue

説明

mapbox-gl-js/v2.1.1:

Question

I have set glyphs to my custom font url but there scenarios which are breaking the font when some character is not found. A character 〜 is not found and then mapbox tries to request from a different range from 0-255 -> some other range but that range does not exist in my font as i only have 0-255 range. How can i add a fallback that either it finds the 〜 and displays or it shows a ? instead of the characters which are not found.

Due to this my map style is breaking.

コントリビューターガイド

技術スタック
javascript
領域
frontend
Issue 種別
feature
難度新しい貢献者にとっての実装難度です。1 は非常に小さな変更、5 は専門的な作業です。
3
推定時間経験ある貢献者が調査、実装、テスト、pull request 準備にかけるおおよその時間範囲です。
1-3 hours
活動状況Issue が今どれだけ取り組みやすいかを示します。新しい、活発、古い、ブロック中、またはメンテナー入力待ちなどです。
needs maintainer response
明確さ期待される変更、受け入れ条件、次の手順がどれだけ明確かを示します。
mostly clear
前提条件
knowledge of Mapbox GL JS glyph loading
初心者向け度初回貢献者にどれだけ取り組みやすいかを 1-100 で推定したスコアです。
30
調査方針
The user requests a fallback for missing glyphs in custom fonts. Investigate glyph loading in Mapbox GL JS, particularly the logic that requests glyph ranges. Look at the source code for font handling (e.g., src/ui/map.js, src/style/style.js) to understand how missing characters are handled. The maintainers need to clarify if a fallback mechanism exists or can be added. Consider adding a configurable fallback font or a placeholder character. Check if similar issues exist or if there is a workaround.