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https://issues.apache.org/jira/browse/PDFBOX-1869?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tilman Hausherr updated PDFBOX-1869:
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Attachment: asy-strokeshade.pdf-1.png
asy-latticeshading.pdf-1.png
rgbcube.pdf-1.png
funsh01.pdf-1.png
Rendered images, two of four are ok.
> Implementation for ShadingType 1
> --------------------------------
>
> Key: PDFBOX-1869
> URL: https://issues.apache.org/jira/browse/PDFBOX-1869
> Project: PDFBox
> Issue Type: Sub-task
> Components: PDModel
> Affects Versions: 2.0.0
> Reporter: Tilman Hausherr
> Priority: Minor
> Attachments: FUNSH01.pdf, RGBCUBE.pdf, Type1ShadingContext.java,
> Type1ShadingPaint.java, asy-latticeshading.pdf, asy-latticeshading.pdf-1.png,
> asy-strokeshade.pdf, asy-strokeshade.pdf-1.png, funsh01.pdf-1.png,
> rgbcube.pdf-1.png
>
>
> Here's an implementation for function based shading and 4 sample files. The
> implementation is rather simple. The real work is done in the function, see
> subtask. I'm using a reverse transformation of the two matrices so that
> getRaster() gets the "pure" values. The implementation works on two test
> images and fails on two. I believe that the cause for the two it fails is the
> problem I had with Type 4 and 5. I also noticed (when debugging) that for
> FUNSH01.pdf, my implementation always gets the same matrices despite that its
> 4 different areas in that page.
> (Don't get confused by the name "asy-latticeshading.pdf", its not type 5
> lattice shading)
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