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https://issues.apache.org/jira/browse/PDFBOX-4962?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17202585#comment-17202585
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Tilman Hausherr edited comment on PDFBOX-4962 at 9/27/20, 9:17 AM:
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There are a lot of rendering differences. For example, in the file
bugzilla886049.pdf (see PDFBOX-1935) the trees are to be dark green. With your
change they are neon green.
Then I tried using the CMYK profile like this
{code}
ICC_ColorSpace CMYKColorSpace = null;
(...)
String name = "/org/apache/pdfbox/resources/icc/ISOcoated_v2_300_bas.icc";
try (InputStream is = PDDeviceCMYK.class.getResourceAsStream(name))
{
ICC_Profile iccProfile = ICC_Profile.getInstance(is);
CMYKColorSpace = new ICC_ColorSpace(iccProfile);
}
(...)
if (colorSpace instanceof PDDeviceCMYK)
{
return new Color(CMYKColorSpace, color.getComponents(), 1);
}
{code}
The differences were invisible, except for one rendering of the Ghent test
files which was wrong before and is wrong differently now.
Does the second strategy help with the printing / PS issues mentioned?
was (Author: tilman):
There are a lot of rendering differences. For example, in the file
bugzilla886049.pdf (see PDFBOX-1935) the trees are to be dark green. With your
change they are neon green.
Then I tried using the CMYK profile like this
{code}
ICC_ColorSpace CMYKColorSpace = null;
(...)
String name = "/org/apache/pdfbox/resources/icc/ISOcoated_v2_300_bas.icc";
try (InputStream is = PDDeviceCMYK.class.getResourceAsStream(name))
{
ICC_Profile iccProfile = ICC_Profile.getInstance(is);
CMYKColorSpace = new ICC_ColorSpace(iccProfile);
}
(...)
if (colorSpace instanceof PDDeviceCMYK)
{
return new Color(CMYKColorSpace, color.getComponents(), 1);
}
{code}
The differences were invisible, except for one rendering of the Ghent test
files which was wrong before and is wrong differently now.
Does this strategy help with the printing / PS issues mentioned?
> CMYK support
> ------------
>
> Key: PDFBOX-4962
> URL: https://issues.apache.org/jira/browse/PDFBOX-4962
> Project: PDFBox
> Issue Type: Bug
> Reporter: Simon Steiner
> Priority: Major
> Attachments: pdfbox2cmyk.patch
>
>
> If the content stream has a cmyk color:
> 0 0 0 1 k
> pdfbox will convert this to rgb causing loss of fidelity
> is it possible to pass the cmyk color when you call graphics2d eg:
> {color:#660e7a}graphics{color}.setPaint(cmyk value)
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