mapbox/mapbox-gl-js

When a character from custom font is not found.

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#12,975 创建于 2023年11月16日

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 (2 评论) (0 反应) (0 负责人)JavaScript (10,532 star) (2,203 fork)batch import
feature :green_apple:good first issue

描述

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.

贡献者指南

技术栈
javascript
领域
frontend
议题类型
feature
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
3
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
1-3 hours
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
needs maintainer response
清晰度议题是否清楚说明期望改动、验收标准和下一步。
mostly clear
前置要求
knowledge of Mapbox GL JS glyph loading
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
30
研究方向
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.