A new built-in add-on, Image Tools (Object › Plug-ins › Image Tools),
adds Remove Background… (`addon.image.removeBackground`). It makes the
background of the selected images transparent by lowering the alpha of
their own pixels, in one undo step, with no service or model. The
background is the most common color along the image's edges, the
average of the image's corners, or colors the user picks. Contiguous
(on by default) clears it only where it reaches in from an edge; off,
it is cleared wherever it is. Tolerance and Softness (0 to 100, 10 by
default) set how near a color must be to be cleared and the band over
which pixels fade out. Match measures that nearness as the RGB
distance or as the largest difference on one channel. It is a
VectorCraft addition.
- The image stays an image: an embedded PNG with alpha, the source's
ICC profile and resolution, and 16 bits or gray when the source is.
A linked image is embedded and keeps its Placement Options.
- When the edges hold at least as many clear pixels as pixels of their
most common color, edge mode clears nothing, so a second run leaves
the subject alone. Corner mode leaves clear corners out of the
average and clears nothing when all four are clear.
- With Match set to Each Channel, a tolerance of t / 255 × 100 clears
the colors within t 8-bit steps on every channel.
- A CMYK image, a linked image that shows its preview, an image that
would need more than the decode allowance (checked from its header)
and a result with no pixel left are refused, and the document stays
as it was. When no pixel changes, no undo step is added. The result
reports `cleared`, the pixels made fully clear.
- Picked colors are hex colors, with or without `#`, or black, white,
red, green or blue.
- The dialog opens with Preview off; with Preview on, the canvas shows
the result, and Cancel puts the image back. While the dialog
previews, the session keeps the images' decoded pixels (at most
128 MiB, 32 MiB in the web app) so each preview step does not decode
them again, and releases them when the dialog closes with OK or
Cancel. A run that is not a preview step keeps nothing.
Docs: docs/mcp.md (Image Tools add-on), docs/target-app-parity.md.
A sent path whose text overlapped part of a hidden library's path could
keep that path from being hidden; the hidden libraries' ids and paths
are now matched first. A hidden relative path is also hidden where a
reply shows the absolute path it reads as from the working folder, and
a hidden library sent by that other form shows as the sent path does.
A library loaded from outside a confined client's read roots keeps its
`loaded/<file name>` id for the session, in ui.inspect, ui.docking and
the library commands, so an id taken from an earlier reply still finds
the same library after another library with the same file name is
loaded. swatch.library.copyToUser leaves out `path` when the file is
outside the read roots, as the saves do.
The ids come from the engine's concealed_library_ids, which now reads a
path written with either separator, counts another platform's absolute
path as outside the roots, and keeps each id in the session.
Outside Windows, a library path that starts with a drive or a backslash counts as outside the read roots, since the file access check would read it as a name in the working folder.
Each hidden id or path is replaced once, chosen from the reply as given,
so a hidden path inside another library's shown id is not replaced
again, and a readable id written with %XX escapes keeps the hidden path
it begins with. A path quoted with {:?} is matched with its quotes and
control characters escaped. A path outside the read roots that the
request sent is shown by its file name in a reply that succeeded as in
one that failed, and a path param counts with a relative path too. A
relative path is not replaced where it ends a longer path. Without a
read root, a file: URL that names another host stays in ui.inspect's
recorded steps.
A literal makes an extensible object whose properties are writable and
configurable, and an array whose length is writable. toSource wrote a
property defined with writable or configurable false, a sealed, frozen or
non-extensible object or array, and an array with a read-only length as an
ordinary literal, so evaluating the text gave an open value.
toSource now throws a TypeError for each of these, at any depth, as it
already does for getters, hidden properties and other prototypes.
Properties defined with every flag on are written as before.
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