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For SVG icons, prefer Icon.paintIcon over Graphics.drawImage - #8309
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March 11, 2025 13:42
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2f150eeCompare…resolution. Various SVG icons were previously shown in a lower resolution due to being painted with Graphics.drawImage(ImageIcon, x, y, null) instead of Icon.paintIcon(null, Graphics, x, y). This PR changes the former to the latter in all the simple cases that were found throughout the codebase (by grepping for 'drawImage' and manually reviewing each case). For example, the lightbulb icons in the editor gutter, and the actions in the menu that shows up when you click them, were shown in low resolution on Windows 11 with 150% HiDPI scaling enabled. This is mostly an improvement for screens with a fractional HiDPI scaling (e.g. 150%) on Windows. On 200% scaling (including on MacOS), icons are drawn properly even with drawImage, due to ImageUtilities returning MultiResolutionImage instances nowadays with 1x and 2x resolutions present.
eirikbakke
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Mar 12, 2025
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Thanks for the quick review! Will merge. |
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Here are a few more changes to ensure that SVG icons render at full resolution on HiDPI screens.
This PR handles the transformation from
Graphics.drawImage(ImageIcon, x, y, null)to
Icon.paintIcon(null, Graphics, x, y)at various places in the codebase.
This fixes e.g. poor-resolution lightbulb icons in the editor gutter on Windows at fractional HiDPI scale factors. See the before/after screenshot below, which was taken on Windows 11 with the 150% HiDPI scaling level.
All simple such cases were found by grepping for "drawImage" and reviewing each case. Test classes and NBI related classes were skipped.
This is mostly an improvement for screens with a fractional HiDPI scaling (e.g. 150%) on Windows. On 200% scaling (including on MacOS), icons are drawn properly even with drawImage, due to ImageUtilities returning MultiResolutionImage instances nowadays with 1x and 2x resolutions present. The latter is still a good fallback for cases that may not yet be covered otherwise.