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https://issues.apache.org/jira/browse/PDFBOX-615?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13880448#comment-13880448
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Tilman Hausherr commented on PDFBOX-615:
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See my comment from 17/Jan/14 08:11 for how to get the bit-io. That comment
also mentions some other changes in other files that are needed. I'd advise
against putting this in the trunk. (There are changes in radial and axial
shadings that have also not been committed, likely because there is more work
to do on them)
> shfill operator needs implementation
> ------------------------------------
>
> Key: PDFBOX-615
> URL: https://issues.apache.org/jira/browse/PDFBOX-615
> Project: PDFBox
> Issue Type: New Feature
> Components: PDModel
> Reporter: Daniel Wilson
> Assignee: Daniel Wilson
> Attachments: Centerplan.pdf, DECAHED.pdf, GouraudShadingContext.java,
> GouraudTriangle.java, LATTICE1.pdf, LATTICE2.pdf, Type4ShadingContext.java,
> Type4ShadingPaint.java, Type5ShadingContext.java, Type5ShadingPaint.java,
> Vertex.java, axial-input-after.png, axial-input-before.png, axial-input.pdf,
> bugzilla843488.pdf, bugzilla843488.pdf-1.png, color_gradient.pdf,
> color_gradient.pdf-1.png, decahed.pdf-1.png, input.pdf, input1.png,
> lattice1.pdf-1.png, lattice2.pdf-1.png, pdfbox-1.8.patch, pdfbox.patch,
> pslib-shading.pdf, radial-input-after.png, radial-input-before.png,
> radial-input.pdf, shading_pattern.pdf, shading_pattern.pdf-2.png,
> trityp4.pdf-1.png
>
>
> I have a PDF file (for which I do not yet have release permission) that uses
> the "sh" operator, equivalent to PostScript's shfill (per PDF spec 1.7 page
> 987).
> Adobe provides implementation guidance in a 78-page document at
> http://www.adobe.com/devnet/postscript/pdfs/TN5600.SmoothShading.pdf#17
> I will be trying to add this functionality this week, but if anyone has
> hints, suggestions, etc. they are most certainly welcome!
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