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Bug
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Resolution: Unresolved
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None
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Minecraft 1.10.2, Minecraft 16w39c, Minecraft 1.11, Minecraft 1.11.2, Minecraft 17w06a, Minecraft 1.12.1, Minecraft 1.12.2, Minecraft 17w45b, Minecraft 17w46a, Minecraft 18w20c, Minecraft 18w21a, Minecraft 18w21b, Minecraft 18w22a, Minecraft 18w22b, Minecraft 18w22c, Minecraft 1.13-pre1, Minecraft 1.13-pre2, Minecraft 1.13-pre3, Minecraft 1.13-pre4, Minecraft 1.13-pre5, Minecraft 1.13-pre6, Minecraft 1.13-pre7, Minecraft 1.13-pre8, Minecraft 1.13-pre10, Minecraft 1.13, Minecraft 18w30a, Minecraft 18w30b, Minecraft 18w31a, Minecraft 18w32a, Minecraft 18w33a, Minecraft 1.13.1-pre1, Minecraft 1.13.1-pre2, Minecraft 1.13.1, Minecraft 1.13.2-pre1, Minecraft 1.13.2-pre2, Minecraft 1.13.2, Minecraft 18w43b, Minecraft 18w43c, Minecraft 18w44a, Minecraft 18w45a, Minecraft 18w46a, Minecraft 18w47a, Minecraft 18w47b, Minecraft 18w48a, Minecraft 18w48b, Minecraft 18w49a, Minecraft 18w50a, Minecraft 19w02a, Minecraft 19w05a, Minecraft 19w07a, Minecraft 19w08a, Minecraft 19w08b, Minecraft 19w09a, Minecraft 19w11a, Minecraft 19w11b, Minecraft 19w12a, Minecraft 19w12b, Minecraft 19w13a, Minecraft 19w13b, Minecraft 19w14a, Minecraft 19w14b, Minecraft 1.14 Pre-Release 1, Minecraft 1.14 Pre-Release 2, Minecraft 1.14 Pre-Release 5, Minecraft 1.14, Minecraft 1.14.1, Minecraft 1.14.2 Pre-Release 1, Minecraft 1.14.2 Pre-Release 2, Minecraft 1.14.2 Pre-Release 3, Minecraft 1.14.2, Minecraft 1.14.3 Pre-Release 3, Minecraft 1.14.3 Pre-Release 4, Minecraft 1.14.3, Minecraft 1.14.4 Pre-Release 1, Minecraft 1.14.4 Pre-Release 3, Minecraft 1.14.4 Pre-Release 4, Minecraft 1.14.4 Pre-Release 5, Minecraft 1.14.4 Pre-Release 6, 1.14.4, 19w34a, 19w35a, 19w36a, 19w37a, 19w38b, 19w39a, 19w40a, 19w41a, 19w42a, 19w44a, 19w45b, 19w46b, 1.15 Pre-release 1, 1.15 Pre-Release 2, 1.15 Pre-release 3, 1.15 Pre-release 4, 1.15 Pre-release 5, 1.15 Pre-release 6, 1.15 Pre-release 7, 1.15, 1.15.1, 1.15.1 Pre-release 1, 1.15.2 Pre-Release 1, 1.15.2 Pre-release 2, 1.15.2, 20w06a, 20w07a, 20w08a, 20w09a, 20w10a, 20w11a, 20w12a, 20w13a, 20w13b, 20w15a, 20w17a, 20w18a, 20w19a, 20w20a, 20w20b, 20w21a, 1.16 Pre-release 2, 1.16 Pre-release 3, 1.16 Pre-release 6, 1.16 Pre-release 7, 1.16 Pre-release 8, 1.16 Release Candidate 1, 1.16, 1.16.1, 20w28a, 20w29a, 20w30a, 1.16.2 Pre-release 1, 1.16.2 Release Candidate 1, 1.16.2 Release Candidate 2, 1.16.2, 1.16.3 Release Candidate 1, 1.16.3, 1.16.4 Pre-release 1, 1.16.4 Pre-release 2, 1.16.4 Release Candidate 1, 1.16.4, 20w46a, 20w48a, 20w51a, 21w03a, 1.16.5, 21w05a, 21w05b, 21w06a, 21w07a, 21w08b, 21w11a, 21w20a, 1.17 Pre-release 1, 1.17 Pre-release 2, 1.17.1, 21w37a, 1.18.1, 22w07a, 1.18.2, 22w16b, 1.19, 22w24a, 1.19.2, 1.19.3, 1.20.1, 1.20.2, 1.20.3 Pre-Release 2, 1.20.4, 24w13a
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Confirmed
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Rendering
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Low
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Platform
The bug
Underlines in chat and /title command intersect each other, causing an ugly effect when fading.
How to reproduce
Take a screenshot or enter the following command:
/title @a title {"text":"words","underlined":true}
→ 
Note how the pixels in the underline between the individual characters of the word "words" are much bolder than they should be when the text is fading in and out.
Note: You can make the effect more obvious by first using the command
/title @a times 100 0 100
Code analysis
Based on 1.11 decompiled using MCP 9.35 rc1
The method net.minecraft.client.gui.FontRenderer.renderStringAtPos(String, boolean) has a strange condition when drawing underlined text. It enlarges the line one pixel to the left if it should draw underlined text, which is of course always true because it is currently drawing underlined text. Maybe it was supposed to test if the text is italic or unicode? But enlarging the line to the left means that it will overlap if a underlined character is in front of it, which causes this effect.
Removing this should probably not cause any problems.
Examples
Here are some examples:
- is duplicated by
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- Resolved
