annotation contents doesn't support Chinese

[wms6017]

As shown in the above Figure，some Chinese text are ignored and disappeared.

[xqm32]

I have the same problem.

Reproduce:

• Create a new free text annotation in a .pdf file(I use C17 Final Draft.pdf)
• Input the character 生(\u751f), 产(\u4ea7), 的(\u7684)
• The character 生(\u751f) and 的(\u7684) display, but the character 产(\u4ea7) not
• The character 產(\u7522), which is the traditional character of 产(\u4ea7) can display
• The character 亦(\u4ea6) and 亨(\u4ea8) whose Unicode are next to 产(\u4ea7) can display

In addition, all character in CJK Unified Ideographs Extension A(\u3400—\u4db5) seem unsupported.

SumatraPDF Version: 3.3.3 Windows Version: Windows 家庭中文版(Home, Chinese) 19043.1348 Annotation in: C17 Final Draft.pdf

[GitHubRulesOK]

related to https://github.com/sumatrapdfreader/sumatrapdf/issues/2154

[GitHubRulesOK]

whilst 2 wrongs dont make a write the behaviour in edge is worse

SumatraPDF can try to correct the fully seen characters in the comment even if MuPDF cannot render all of them !

@kjk I had hoped the latest CJK font update may have helped with annotation rendering but it seems there may be ? a MuPDF issue with that character range \u3400—\u4fff ?

[GitHubRulesOK]

potential duplicate of https://github.com/sumatrapdfreader/sumatrapdf/issues/1671 MuPDF only supports PDF Standard 14 fonts in comments.

[LiuZengqiang]

I encountered the same problem, do you have any solutions?

[wms6017]

Thank you for your answer

At 2023-10-23 11:49:23, "GitHubRulesOK" @.***> wrote:

potential duplicate of #1671 MuPDF only supports PDF Standard 14 fonts in comments.

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[GitHubRulesOK]

@wms6017 It should be possible to support UTF-16bit in comments as "Rich Text" and unsure how far MuPDF/SumatraPDF has gone towards supporting that more complex annotation. but not all Chinese characters stick to the 2 byte (paired) when import/export by say clipboard As I have seen on occasion some 3 byte or more coding's.

The Issue is clearly not well covered so this issue is "held open" for now.