OpenPDF uses font 'xxx' with 'Identity-H' is not recognized

Little scum · Posted on 5/23/2024 3:56:31 PM

OpenPDF is a Java library for creating and editing PDF files using LGPL and MPL open source licenses. OpenPDF is the LGPL/MPL open-source successor to iText, which is based on some forks of the iText 4 svn tag.

Insert a Chinese string using the system font, the code is as follows:

Login is visible.

The error is always as follows:

Font 'xxx' with 'Identity-H' is not recognized

Reason: The ttc file format is TrueTypeCollectionFonts, which contain a variety of fonts, with an increased 0 indicating the use of a font with an index of 0.

The solution is as follows:

Login is visible.

Little scum · Posted on 5/23/2024 3:57:15 PM

Font types TrueType and OpenType difference
https://www.itsvse.com/thread-10763-1-1.html

Little scum · Posted on 1/6/2025 5:22:59 PM

In PDF documents, Identity-H and Identity-V are two common font encoding methods used to embed non-Latin character sets (such as Chinese, Japanese, Korean, etc.).

Identity-H is designed for horizontal typography, with characters arranged from left to right.
Identity-V is designed for vertical typography, with characters arranged from top to bottom.

The main difference between Identity-H and Identity-V is that they are optimized for horizontal and vertical typography, respectively. The choice of encoding depends on your document layout needs. If you're not sure about the layout direction, Identity-H is usually chosen by default, as most modern documents are typeset horizontally.

[Source] OpenPDF uses font 'xxx' with 'Identity-H' is not recognized

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