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Java 9+ Windows Display Scaling and chart rendering #170

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colomb001 opened this issue Sep 17, 2020 · 5 comments
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Java 9+ Windows Display Scaling and chart rendering #170

colomb001 opened this issue Sep 17, 2020 · 5 comments

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@colomb001
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colomb001 commented Sep 17, 2020 •
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With Java 9 adding support for HiDPI monitors and resolution scaling, chart rendering quality suffers greatly on monitors with non 100% scaling values under Windows 10. This can be alleviated by turning off ChartPanel double buffering. It would be nice to retain double buffering for ChartPanels and not have rendering issues with resolution scaling turned on.

With double buffering enabled: doubleBuffering

With double buffering disabled: noDoubleBuffering
@trashgod
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See also this forum thread.

@colomb001
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See also this forum thread.

That thread contains two posts, both from me. Unfortunately, neither provide a solution.

@trashgod
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I though the link might be useful to others.

@DrBAXA
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DrBAXA commented Oct 21, 2020

I did get the same issue on 4k screens.
The problem is that image buffer with enabled buffering is created with the size of logical resolution provided by Swing. Real screen resolution is higher. Without buffering renderer uses something like vector graphics and Swing can manage this to look good but when first rendered into the image it can't be properly upscaled to the higher resolution.

I have solved this issue and created pull request #179 , however, it looks slightly like a hack so I'm not sure if it should be accepted.

@jfree
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jfree commented Oct 22, 2020

The fix looks good, I merged the pull request.

@jfree jfree closed this as completed Oct 22, 2020
jfree added a commit that referenced this issue Oct 22, 2020
@jfree
Mention fix for high DPI devices #170
bbd2c29
jfree added a commit that referenced this issue Oct 23, 2020
@jfree
Fix high DPI issue in ChartPanel - bug #170
fa5a113
jfree added a commit that referenced this issue Oct 24, 2020
@jfree
Small amendment to fix from bug #170
7881741
@vsonnier vsonnier mentioned this issue Jan 27, 2021
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@steffen-wilke steffen-wilke mentioned this issue Jan 31, 2021
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4 participants
@jfree @DrBAXA @colomb001 @trashgod