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https://issues.apache.org/jira/browse/PDFBOX-5134?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17304339#comment-17304339
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Tilman Hausherr edited comment on PDFBOX-5134 at 3/18/21, 6:36 PM:
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Thanks, I tested this, and hit a few minor problems:
- context.getBounds() can be null
- PDTriangleBasedShadingType is also types 6 and 7, which do not produce a
GouraudShadingContext
Sadly types 6 and 7 are derived from type 4, so for the test I checked the
class name like this \{{shading.getClass().getName().endsWith("4") ||
shading.getClass().getName().endsWith("5")}}.
- in one case, the context is a SoftMask
I avoided all these and all renderings are fine!
Another problem is making stuff public. We usually try to avoid that, because
the more there is public, the more there is a risk of people using the API in
weird ways that we haven't thought about.
was (Author: tilman):
Thanks, I tested this, and hit a few minor problems:
- context.getBounds() can be null
- PDTriangleBasedShadingType is also types 6 and 7, which do not produce a
GouraudShadingContext
Sadly types 6 and 7 are derived from type 4, so for the test I checked the
class name like this \{{shading.getClass().getName().endsWith("4") ||
shading.getClass().getName().endsWith("5")}}.
- in one case, the context is a SoftMask
I avoided all these and all renderings are fine!
Another problem is making stuff public. We usually try to avoid that, because
the more there is public, the more there is a risk of people using the API in
weird ways that we haven't thought about.
> Very slow rendering on PageDrawer.shadingFill
> ---------------------------------------------
>
> Key: PDFBOX-5134
> URL: https://issues.apache.org/jira/browse/PDFBOX-5134
> Project: PDFBox
> Issue Type: Bug
> Reporter: Oliver Schmidtmer
> Priority: Major
> Labels: shading
> Attachments: Plan zum Testen.pdf, image-2021-03-17-20-16-49-221.png
>
>
> The PDF contains many effectively very small shadings, the light cones. As
> the gradient painting for each light cone is applied on the whole image,
> rendering is very slow: 29 of 33 seconds are spent in shadingFill.
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