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Image Trace: an image over 64 megapixels is traced scaled down

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An image larger than the tracer's 64 megapixels was refused. It is now
decoded and box-filtered down to the largest size of its aspect within
64 megapixels, and the traced paths are mapped back to the image's own
size. Images over 192 megapixels are still refused from their header,
before decoding.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XbTizgRsDpFPjtBgZAvfrZ
This commit is contained in:
Fabian Grajales
2026-10-12 08:22:39 +07:00
committed by bflatastic
co-authored by Claude Opus 5.5
parent 6aa2b9b0fb
commit e1fe2e388b
4 changed files with 76 additions and 3 deletions
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crates/engine/src/cmd/buildcmds.rs
+2 -1
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@@ -734,7 +734,8 @@ fn trace_make(s: &mut Session, p: &Value, expand: bool) -> Result<Value> {
.ok_or_else(|| bad(C, "select an image (or an Image Trace group)"))?
};
let blob = s.doc()?.doc.images.get(&img.key).ok_or_else(|| EngineError::Other(format!("image data `{}` is missing", img.key)))?;
let raster = tr::Raster::decode(&blob.bytes).map_err(|e| EngineError::Other(e.to_string()))?;
// An image over the tracer's size is traced scaled down (the paths are scaled back below).
let raster = tr::Raster::decode_to_fit(&blob.bytes).map_err(|e| EngineError::Other(e.to_string()))?;
let library = trace_library(s, &mut params)?;
let res = tr::trace_within(&raster, &params, MAX_TRACE_ANCHORS).map_err(|e| EngineError::Other(e.to_string()))?;
// Pixel space of the decoded raster → the image object's pixel space → document.