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https://issues.apache.org/jira/browse/PDFBOX-615?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tilman Hausherr updated PDFBOX-615:
-----------------------------------
Attachment: GouraudShadingContest.java
Type5ShadingContext.java
Type4ShadingContext.java
GouraudTriangle.java
Vertex.java
Type5ShadingPaint.java
Code for type 4 and (new) 5 shading, refactored. The two changes in other
classes described previously must be done analog for type 5. The background
problem is not just "not knowing what to paint there" because this time (see
lattice1.pdf) there is text around the pattern which is missing in the rendered
image. Any help is appreciated.
> 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, GouraudShadingContest.java,
> GouraudTriangle.java, Type4ShadingContext.java, 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,
> 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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