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Posted to dev@pdfbox.apache.org by "Tilman Hausherr (Jira)" <ji...@apache.org> on 2024/11/15 08:45:00 UTC
[jira] [Comment Edited] (PDFBOX-5901) there is an issue with font mapping or rendering
[ https://issues.apache.org/jira/browse/PDFBOX-5901?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17898511#comment-17898511 ]
Tilman Hausherr edited comment on PDFBOX-5901 at 11/15/24 8:44 AM:
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Extraction does work, here's what I get with page 24 if I comment out the logging:
{noformat}
2024营销趋势洞察24
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{noformat}
The real problem is that the logging makes it very slow. I'll look for a way to reduce this.
The file is also very slow in PDF.js, which indicates it isn't just us.
It all happens because {{idDelta}} is negative, this gets a negative result, then 65536 is added to it and now it's too large. However a negative idDelta isn't illegal:
https://learn.microsoft.com/en-us/typography/opentype/spec/cmap#format-2-high-byte-mapping-through-table
was (Author: tilman):
Extraction does work, here's what I get with page 24 if I comment out the logging:
{noformat}
2024营销趋势洞察24
监控和管理您的品牌形象。
您想实时发现新的消费趋势吗？
我们最先进的视觉人工智能技术可帮助营销人员搜索和监控图像：
. 标志和名人检测
. 人脸检测（年龄、性别、密度）
. 场景和物体检测
. 情绪检测
. 模因检测
. 物体字符识别
. 图像聚类
另外，您可以在我们的网红营销平台 Klear 中上传图像，以发现创建
类似内容的网红。
了解更多
{noformat}
The real problem is that the logging makes it very slow. I'll look for a way to reduce this.
> there is an issue with font mapping or rendering
> ------------------------------------------------
>
> Key: PDFBOX-5901
> URL: https://issues.apache.org/jira/browse/PDFBOX-5901
> Project: PDFBox
> Issue Type: Bug
> Components: FontBox
> Affects Versions: 2.0.31, 2.0.32, 3.0.3 PDFBox
> Reporter: ltzzZ
> Assignee: Tilman Hausherr
> Priority: Major
> Attachments: PDFBOX-5901-p24.pdf, image-2024-11-15-12-38-12-100.png, image-2024-11-15-12-38-36-179.png, image-2024-11-15-12-39-22-585.png
>
>
> When I try to extract the text content of a pdf file, I keep looping through the warning log of font rendering or mapping, I can't get the content of the file, how can I fix this problem.
>
> My code：
> !image-2024-11-15-12-38-36-179.png!
> problem：
> !image-2024-11-15-12-39-22-585.png!
> and sometimes the CPU usage is abnormal
> !image-2024-11-15-12-38-12-100.png!
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