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https://issues.apache.org/jira/browse/PDFBOX-4267?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tilman Hausherr updated PDFBOX-4267:
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Description:
The image softmask in the attached file has a {{/Matte 0 0 0}} entry. PDFBox
displays the PDF differently than Adobe Reader, the reflection shown by PDFBox
is barely visible. When the /Matte entry is deleted, then it is barely visible
in Adobe Reader too. So the /Matte entry does make some difference, although I
don't understand how.
In the PDF specification, the formula shown is c' = m + α x (c - m). So 0
should have no effect?!
I looked at the code of PDF.js, they have a special handling when alpha is 0,
don't know why.
was:
The image softmask in the attached file has a {{/Matte 0 0 0}} entry. PDFBox
displays the PDF differently than Adobe Reader, the reflection shown by PDFBox
is barely visible. When the /Matte entry is deleted, then it is barely visible
in Adobe Reader too. So the /Matte entry does make some difference, although I
don't understand how.
In the PDF specification, the formula shown is c' = m + α x (c - m). So 0
should have no effect?!
I looked at the code of PDF.js, they have a special handling when alpha is 0.
> Incorrect rendering when /Matte entry
> -------------------------------------
>
> Key: PDFBOX-4267
> URL: https://issues.apache.org/jira/browse/PDFBOX-4267
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering
> Affects Versions: 2.0.11, 3.0.0 PDFBox
> Reporter: Tilman Hausherr
> Priority: Major
>
> The image softmask in the attached file has a {{/Matte 0 0 0}} entry. PDFBox
> displays the PDF differently than Adobe Reader, the reflection shown by
> PDFBox is barely visible. When the /Matte entry is deleted, then it is barely
> visible in Adobe Reader too. So the /Matte entry does make some difference,
> although I don't understand how.
> In the PDF specification, the formula shown is c' = m + α x (c - m). So 0
> should have no effect?!
> I looked at the code of PDF.js, they have a special handling when alpha is 0,
> don't know why.
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