forked from 1b-agent/opencadstudio-upstream
Hakan SevenandClaude Fable 5
e8411c1b6d
OLE2FRAME entities whose compound file carries a metafile presentation (Excel/Word previews, scanned WMF pages) drew only their border frame — the old decoder scanned the raw blob for a contiguous BMP, which the CFB sector layout almost never provides. acadrust now extracts the picture bytes tagged by kind; the new scene/model/gdi player rasterizes EMF and WMF record streams on the CPU (pens/brushes, polygons, paths, DIB blits, clipping, transforms) with text drawn through the existing system-font glyph cache, and image_model feeds the result into the raster pipeline. Rasters (BMP/PNG/JPEG/GIF, CF_DIB) decode as before via the image crate. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
29 lines
1.1 KiB
Rust
29 lines
1.1 KiB
Rust
// OLE2FRAME binary data → presentation RGBA image.
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//
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// Extraction (compound-file walk, OlePres header parse, WMFC → EMF
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// reassembly) lives in acadrust — `extract_presentation` returns the picture
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// bytes tagged by kind. This module only decodes them: rasters through the
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// `image` crate, metafiles through the `gdi` player.
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use acadrust::entities::{extract_presentation, OlePresentation};
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use super::gdi;
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/// Decode the picture for an OLE2FRAME data blob. Returns RGBA + dimensions.
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pub fn decode(data: &[u8]) -> Option<(Vec<u8>, u32, u32)> {
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match extract_presentation(data)? {
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OlePresentation::Raster(bytes) => {
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let img = image::load_from_memory(&bytes).ok()?;
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let rgba = img.to_rgba8();
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let (w, h) = rgba.dimensions();
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if w == 0 || h == 0 {
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return None;
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}
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Some((rgba.into_raw(), w, h))
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}
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OlePresentation::Dib(bytes) => gdi::dib::decode_packed(&bytes),
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OlePresentation::Emf(bytes) => gdi::render_emf(&bytes),
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OlePresentation::Wmf(bytes) => gdi::render_wmf(&bytes),
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}
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}
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