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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PDFBOX-4363) [Patch] Add a common interface PDShadingPaint for all shading paints
Date Sat, 03 Nov 2018 17:54:00 GMT

    [ https://issues.apache.org/jira/browse/PDFBOX-4363?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16674140#comment-16674140
] 

ASF subversion and git services commented on PDFBOX-4363:
---------------------------------------------------------

Commit 1845678 from tilman@apache.org in branch 'pdfbox/trunk'
[ https://svn.apache.org/r1845678 ]

PDFBOX-4363: revert acidental commit of unused test code

> [Patch] Add a common interface PDShadingPaint for all shading paints
> --------------------------------------------------------------------
>
>                 Key: PDFBOX-4363
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-4363
>             Project: PDFBox
>          Issue Type: Improvement
>          Components: Rendering
>    Affects Versions: 2.0.12
>            Reporter: Emmeran Seehuber
>            Priority: Minor
>         Attachments: pdshadingpaint_base_interface.patch, shadingpaint_generic_baseclass.patch
>
>
> The attached patch adds an common interface PDShadingPaint to all PDShading-based Paint's.
It allows to access the underlying PDShading object and the matrix of the paint.
> At the moment it is not possible to access this fields without using dirty accessibility hacks,
see also [this commit|https://github.com/rototor/pdfbox-graphics2d/commit/8603f6f9c781604d4684b8cb46499703c34b4711].
> Why would you need that? I need that for my [PdfBoxGraphics2D|https://github.com/rototor/pdfbox-graphics2d]
adapter. I draw PDF pages using PDFRenderer/PageDrawer back into a PDF. While doing so I derive
from both classes and change / filter certain aspects of the PDF. One use case is to extract
a specific seperation color into its own PDF page, remap it to another color and also draw
some overfill (i.e. a additional border of 0.5pt around all shapes drawn with this color).
This so prepared page is then used with a machine which glues foil (gold, silver or copper)
on the places marked with that color.
> You can look at an [example here|https://github.com/rototor/pdfbox-graphics2d/blob/master/src/test/java/de/rototor/pdfbox/graphics2d/PdfRerenderTest.java],
it does not use a seperation color, but you should get the idea. 
> My long term goal is to be able to use PDFBox for all possible pre-press PDF manipulations.
E.g. changing/remapping colorspaces, resampling images to the target resolution, ...
> At the moment I know of this "special cases" which will need a special treatment, as
they are normally handled through rendering them first into a BufferedImage:
>  - Transparency groups
>  - Softmasks
> Are there other places which resort to rendering to a BufferedImage first?



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