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https://issues.apache.org/jira/browse/PDFBOX-5491?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17580537#comment-17580537
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Tilman Hausherr edited comment on PDFBOX-5491 at 8/17/22 2:39 AM:
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I played a bit with this and added a line that is identical to the clipping
path and also saved the image of the transparency group. The line shows that
the shape begins one pixel too low.
The image of the shape does also have one empty pixel line on top.
Changing {{minY = (int) Math.floor(bounds.getMinY());}} in {{PageDrawer.java}}
to use "round" instead of "floor" brings a better image so this is definitively
somewhere to look at.
{{bounds.getMinY()}} is 221.71 so {{floor}} reduces this to 221 which is almost
a full pixel.
I tried to compensate this by adding {{g.translate(minX - bounds.getMinX(),
minY - bounds.getMinY());}} before "flip y-axis", and also doing a better
calculation for width/height {{Math.ceil(bounds.getWidth())}} but now it seems
there's a bit missing on top.
Oh, the other file with the bullet points still looks despite the changes.
was (Author: tilman):
I played a bit with this and added a line that is identical to the clipping
path and also saved the image of the transparency group. The line shows that
the shape begins one pixel too low.
The image of the shape does also have one empty pixel line on top.
Changing {{minY = (int) Math.floor(bounds.getMinY());}} in {{PageDrawer.java}}
to use "round" instead of "floor" brings a better image so this is definitively
somewhere to look at.
{{bounds.getMinY()}} is 221.71 so {{floor}} reduces this to 221 which is almost
a full pixel.
I tried to compensate this by adding {{g.translate(minX - bounds.getMinX(),
minY - bounds.getMinY());}} before "flip y-axis", and also doing a better
calculation for width/height {{Math.ceil(bounds.getWidth())}} but now it seems
there's a bit missing on top.
> Transparency Group images slightly cropped
> ------------------------------------------
>
> Key: PDFBOX-5491
> URL: https://issues.apache.org/jira/browse/PDFBOX-5491
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering
> Affects Versions: 2.0.26
> Reporter: Henry Iguaro
> Priority: Major
> Attachments: PDFBOX-5491-1-new.jpg, PDFBOX-5491-1-old.jpg,
> bullet-points-cropped.pdf, image-2022-08-11-14-50-33-042.png,
> image-2022-08-11-14-55-38-711.png, tg-cropped.pdf
>
>
> When importing the following file: [^tg-cropped.pdf]
> The resulting image (that comes from a Transparency Group) it's slightly
> cropped from the bottom:
> !image-2022-08-11-14-50-33-042.png!
> Similarly with this other file: [^bullet-points-cropped.pdf], the icons and
> bullet points are Transparency Groups that render slightly cropped.
> !image-2022-08-11-14-55-38-711.png!
> Increasing the `pageScale` in `PageDrawer` helps but you even when set it to
> 4x the artifact it's still noticeable.
>
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