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https://issues.apache.org/jira/browse/FOP-3301?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18066983#comment-18066983
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DaveLaw commented on FOP-3301:
------------------------------
ok, here's what happens:
{color:#000000}{color:#000000}org.apache.xmlgraphics.image.loader.ImageManager
blindly iterates over Preloaders of the supported Image formats.
{color:#000000}PreloaderSVG{color} raises the Error Message, but concludes its
not an SVG.
{color:#000000}PreloaderImageIO{color} then recognizes the Image as a PNG &
returns a suitable ImageInfo.{color}{color}
{color:#000000}{color:#000000}Surely it would make sense to use the File
extension, Mime-Type or Resource-Type to identify the Image format before doing
the "blindly" bit?{color}{color}
> FOP seems to think PNG Image is an SVG
> --------------------------------------
>
> Key: FOP-3301
> URL: https://issues.apache.org/jira/browse/FOP-3301
> Project: FOP
> Issue Type: Bug
> Components: image/png
> Affects Versions: 2.11
> Environment: Windows 10, Eclipse 2026-03, JDK 17
> Reporter: DaveLaw
> Priority: Minor
> Fix For: main
>
>
> I'm reading a PNG Image in our custom ResourceResolver.
> It works & finds its way into the resulting PDF.
> But...
> {{org.apache.fop.image.loader.batik.PreloaderSVG}} reports an error:
> {{_"Error while trying to load stream as an SVG file: Invalid byte 1 of
> 1-byte UTF-8 sequence."_}}
> In...
> {code:java}
> ResourceResolver.getResource(final URI uri) throws IOException{code}
> ...I've tried the following...
> {code:java}
> return new Resource(MimeConstants.MIME_PNG, uri.toURL().openStream());{code}
> ...but can't seem to find what Type the Resource should have.
> (also tried null, "PNG" & "png")
> How can I tell FOP it's a PNG and not an SVG?
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