VectorCraft could open and place HP-GL plot files but not write them,
so art for a pen plotter or a vinyl cutter had to go through another
program.
Export As, document.export and Export Selection now write HP-GL.
vectorcraft_cad::hpgl::export draws each visible path once along its
own line: a filled shape is its closed outline and a stroked path its
center line. Type is drawn as glyph outlines, a gradient mesh as its
outline, and a symbol instance as its art with its effects and the
instance's stain. Clipping masks cut the art they clip, and the art is
cut at the artboard's edges. Hidden and non-printing layers, hidden objects,
objects at 0% opacity, template layers, guides and placed images are
left out. Coordinates are plotter units (1016 to the inch, y up) from
the artboard's bottom-left corner or its center, and art more than
8,388,607 units from the origin is cut off.
Each color is a pen, in the order the plot first draws in it (up to
255), or a pen table maps each path to the pen of the nearest color.
With Use Artboards every file of the export uses the same numbering.
The pens draw in turn, each in paint order or, with sortPaths, nearest
path first. Curves are flattened to curveTolerance (0.1 pt by default).
hpglVersion "hpgl" writes IN, SP, PU and PD; "hpgl2" also writes the
palette (NP, PC) and each pen's paths as one encoded polyline (PE).
Options are checked, and Export As writes the file with the defaults.
Plots read back by the HP-GL reader give the same lines.
Docs: docs/mcp.md, docs/control-protocol.md, docs/file-format-parity.md,
docs/target-app-parity.md.
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 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.
dotCooCoo