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M4.90: Save for Web (Legacy) previews and saves optimised GIF, JPEG, PNG-8 and PNG-24 images, slices and HTML

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File > Export > Save for Web (Legacy) (Ctrl/Cmd+Alt+Shift+S) opens a dialog with Original,
Optimized, 2-Up and 4-Up views showing each file's size and download time, and settings for
colour reduction, colours, dither, transparency and matte, interlacing, web snap, lossy GIF,
JPEG quality, the colour table (lock, map to transparent, web shift, sort), image size and
anti-aliasing, Clip to Artboard, sRGB, metadata, slices (all or selected), HTML output and
presets. Preview in Browser opens the HTML page.

Engine: document.exportForWeb, document.exportForWeb.preview (its byte count is the size of
the file Save writes), webExport.settings and webExport.presets.list/save/delete. Saved presets
and the remembered settings are stored in Prefs. Render: quantize_locked, and encode::web for
web snap, colour table edits, lossy GIF and GIF/JPEG comments. PNG files get an sRGB chunk.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
bflatastic
2026-10-05 15:24:51 +07:00
co-authored by Claude Opus 5.5
parent b578c32f4d
commit c6450f6f70
20 changed files with 2959 additions and 36 deletions
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docs/control-protocol.md
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@@ -374,3 +374,12 @@ the save dialog) opens `tiffOptions`, `bmpOptions` or `tgaOptions`: the raster r
(16, 24, 32). The BMP dialog keeps its choices writable together (OS/2 falls back to 24 bits and turns RLE and flipped
rows off; RLE turns flipped rows off). `ui.dialog.set` the fields and `ui.dialog.confirm` writes the file(s) with
`document.export`.
Save for Web: File → Export → Save for Web (Legacy)… (`file.saveForWeb`, Ctrl/Cmd+Alt+Shift+S) opens the `saveForWeb`
dialog on the remembered settings (`webExport.settings`). Its fields are the `document.exportForWeb` settings
(`format`, `colors`, `reduction`, `dither`, `quality`, `colorTable`, `width`, `percent`, `output`…; set `preset` to load
a preset) plus `__view` (`original`, `optimized`, `2up`, `4up`), `__zoom` (`fit` or a percentage), `__kbps` and
`__color` (the colour table's selected colour). `ui.dialog.confirm` remembers the settings and saves (a save panel for
the image, or the page with HTML output; the web downloads the files); with `discard: true` it is Done: it remembers
the settings and closes. `file.saveForWeb` with settings saves without the dialog, and `file.saveForWeb.browser`
writes the HTML page to a temporary folder and opens it in the default browser (desktop).