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Add internal API in SVGrasterizer to rasterize images at given height and width #2514

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Merged
merged 1 commit into from
Sep 24, 2025
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Add internal API in SVGrasterizer to rasterize images at given height and width #2514

merged 1 commit into from
Sep 24, 2025

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@arunjose696
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@arunjose696 arunjose696 commented Sep 15, 2025 •
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It shall be possible to draw images at a custom zoom or size while maintaining the best achievable quality. To support this, images originating from an SVG source must be rasterized at the required size.

The internal API introduced in this PR enables loading SVGs at custom sizes, allowing images to be drawn at any requested zoom level or resolution, as discussed in in vi-eclipse/Eclipse-Platform#326

Goal It shall be possible to draw images at a custom zoom/size at the best achievable quality. This means either

  • rescaling from the most fitting zoomed version of the image that exists
  • rasterizing the image at the according size from an SVG source

This PR specifically adds the internal API to handle rasterization for images coming from SVG sources.

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laeubi commented Sep 15, 2025

@arunjose696 can we please mirror the (relevant) information in the PR? Its always a bit hard to follow for others what are is discussed if it happens in another repository with a different organization.

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laeubi reviewed Sep 15, 2025
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bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/internal/image/SVGRasterizer.java Outdated
*/
public ImageData rasterizeSVG(InputStream stream, int zoom) throws IOException;

public ImageData rasterizeSVG(InputStream stream, int width, int height) throws IOException;
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Please add javadoc here, also if there are any limitations (e.g. what happens when size is negative).

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Added javadoc

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github-actions bot commented Sep 15, 2025 •
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Test Results

  118 files  ±0    118 suites  ±0   12m 8s ⏱️ + 1m 25s
4 439 tests +4  4 420 ✅ +2  17 💤 ±0  2 ❌ +2 
  298 runs  ±0    292 ✅  - 2   4 💤 ±0  2 ❌ +2 

For more details on these failures, see this check.

Results for commit 45dfe6c. ± Comparison against base commit 5d2665d.

♻️ This comment has been updated with latest results.

@laeubi laeubi mentioned this pull request Sep 15, 2025
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@arunjose696 arunjose696 mentioned this pull request Sep 15, 2025
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@arunjose696 arunjose696 linked an issue Sep 15, 2025 that may be closed by this pull request
rasterize the image at the according size from an SVG source vi-eclipse/Eclipse-Platform#449
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@arunjose696 arunjose696 force-pushed the arunjose696/326/rasterizer branch from 663817f to c04bcdf Compare September 15, 2025 14:11
This was referenced Sep 15, 2025
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@HeikoKlare HeikoKlare force-pushed the arunjose696/326/rasterizer branch from c04bcdf to a0f0f0b Compare September 22, 2025 15:04
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HeikoKlare commented Sep 22, 2025

@arunjose696 can you please fix the compilation errors?

Error:  D:\a\eclipse.platform.swt\eclipse.platform.swt\bundles\org.eclipse.swt\Eclipse SWT\common\org\eclipse\swt\internal\image\SVGFileFormat.java:[57] 
Error:  	} catch (IOException e) {
Error:  	         ^^^^^^^^^^^
Error:  Unreachable catch block for IOException. This exception is never thrown from the try statement body

@arunjose696 arunjose696 force-pushed the arunjose696/326/rasterizer branch 2 times, most recently from 74d2f86 to 2f57b89 Compare September 22, 2025 16:08
HeikoKlare
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In general, the change looks good. I have rather minor comments.

@arunjose696 arunjose696 force-pushed the arunjose696/326/rasterizer branch 3 times, most recently from e56c37d to f916385 Compare September 24, 2025 09:39
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Looks almost good to me. I just have minor comments left. Please check the formatting of the code again (I found some place where it seems inaccurate).

@arunjose696
Add internal API in SVGrasterizer to rasterize images at given height…
45dfe6c 
… and width

Adding internal API to SVGRasterizer and simple tests to see if the svgs
are loaded at right sizes by the rasterizer
@arunjose696 arunjose696 force-pushed the arunjose696/326/rasterizer branch from f916385 to 45dfe6c Compare September 24, 2025 12:04
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arunjose696 commented Sep 24, 2025

Looks almost good to me. I just have minor comments left. Please check the formatting of the code again (I found some place where it seems inaccurate).

Fixed formatting

@HeikoKlare HeikoKlare merged commit 8444ec7 into eclipse-platform:master Sep 24, 2025
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@HeikoKlare HeikoKlare deleted the arunjose696/326/rasterizer branch September 24, 2025 12:49
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rasterize the image at the according size from an SVG source

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@arunjose696 @laeubi @HeikoKlare