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[api-minor] Remove the use of (get/put)ImageData when drawing SMasks (bug 1874013)

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and implement then in using some SVG filters and composition.
Composing in using destination-in in order to multiply RGB components by
the alpha from the mask isn't perfect: it'd be a way better to natively have
alpha masks support, it induces some small rounding errors and consequently
computed RGB are approximatively correct.
In term of performance, it's a real improvement, for example, the pdf in
issue #17779 is now rendered in few seconds.
There are still some room for improvement, but overall it should be a way
better.
This commit is contained in:
Calixte Denizet 2024-04-30 16:55:58 +02:00
parent 77e2182b8e
commit 82989e6790
5 changed files with 242 additions and 140 deletions
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2
test/pdfs/issue17779.pdf.link Normal file
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@ -0,0 +1,2 @@
https://github.com/mozilla/pdf.js/files/14522359/p95.pdf

8
test/test_manifest.json
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@ -9957,5 +9957,13 @@
"id": "51R"
}
}
},
{
"id": "issue17779",
"file": "pdfs/issue17779.pdf",
"md5": "764b72e8e56e22662b321b308254fd2b",
"rounds": 1,
"link": true,
"type": "eq"
}
]