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https://issues.apache.org/jira/browse/PDFBOX-1724?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13863153#comment-13863153
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Tilman Hausherr commented on PDFBOX-1724:
-----------------------------------------
According to https://github.com/mozilla/pdf.js/issues/252 the mozilla viewer
uses DeviceGray instead. I've set PDColorSpaceFactory to return a
PDDeviceGray() object
{code}
if( name.equals( PDCalGray.NAME ) )
{
// PDFBOX-1724
// https://github.com/mozilla/pdf.js/issues/252
//retval = new PDCalGray( array );
log.warn("CalGray not implemented, using DeviceGray instead,
see PDFBOX-1724");
retval = new PDDeviceGray(); //TH
}
{code}
IMHO a slightly wrong text color is better than no text at all. Especially
considerung that the current implementation of ColorSpaceCalRGB ignores gamma,
whitepoint, blackpoint or matrix values :-)
> Method createColorModel not implemented for PDCalGray
> -----------------------------------------------------
>
> Key: PDFBOX-1724
> URL: https://issues.apache.org/jira/browse/PDFBOX-1724
> Project: PDFBox
> Issue Type: Bug
> Affects Versions: 1.8.2
> Reporter: Mark Hansohm
> Priority: Minor
> Attachments: problem_pdf.pdf
>
>
> The method createColorModel is not implemented for the class PDCalGray - when
> called, it throws an IOException(!):
> {noformat}
> /**
> * Create a Java colorspace for this colorspace.
> *
> * @return A color space that can be used for Java AWT operations.
> *
> * @throws IOException If there is an error creating the color space.
> */
> protected ColorSpace createColorSpace() throws IOException
> {
> throw new IOException( "Not implemented" );
> }
> {noformat}
> The exception thrown is catched elsewhere (by an aspect?) but it leads to an
> ugly stacktrace in the logfile .. :
> {noformat}
> 2013-09-24 09:32:11,858 ERROR - PDPixelMap : java.io.IOException: Not
> implemented
> java.io.IOException: Not implemented
> at
> org.apache.pdfbox.pdmodel.graphics.color.PDCalGray.createColorModel(PDCalGray.java:114)
> at ...
> at org.apache.pdfbox.pdmodel.PDPage.convertToImage(PDPage.java:781)
> ....
> {noformat}
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