A radial gradient whose circles both have the same negative radius (as a
variable font's instance can give) draws no circle. A glyph painted with
only that gradient was read as no colour glyph, so layout drew its
outline instead. It is now colour art that draws nothing.
With Invert Wrap and a positive offset, a line's band was cut into at
most 64 pieces, and anchor cuts were dropped when a shape had more than
64 of them. Beside a notch the offset fills, a line could stop at the
notch instead of at the grown edge: 20 pt short beside a 0.5625 pt notch
with an offset of 1, and short beside sloped notch sides and tall bands.
The grown shape is now measured exactly: the shape near the band is cut
into trapezoids, each grown by the offset into a convex polygon, and the
line keeps the x at which those polygons hold every height of its band.
The work is capped; a shape that needs more steps than the cap, for
example one whose edges cross one another tens of thousands of times,
keeps the 64-piece measure, which keeps the line inside the grown shape.
A band of no height exactly the offset past a shape's tip now holds a
line too.
Character panel > Tsume, shown with Show East Asian Options, takes away a
percentage of the blank space on each side of a character's ink, inside
its own width, in horizontal type. The value is from 0 to 100, 0 by
default. 50 halves that space and 100 sets the ink against the
characters before and after it; the glyph keeps its shape. A character
without ink, such as a space, keeps its width, and a ligature or a
letter with its marks takes the value of its first character. The
font's pair kerning, tracking, manual kerning and Insert Aki are added
after it, and justification keeps it. Vertical type keeps its spacing.
- text.setFormat and text.setRangeStyle take `tsume`; a value that is
not a number or is outside 0 to 100 is refused, naming the key.
Character styles carry it, and a file holding a value outside the
range opens with the nearer end.
- The Character panel's Tsume field has 0, 25, 50, 75 and 100 in its
menu, and Reset Panel sets it to 0. Character Style Options shows it
in Advanced Character Formats.
- Live SVG text places each character Tsume moves, and type on a path
with Tsume is written as outlines.
Docs: docs/mcp.md (Tsume, Character Style Options fields),
docs/target-app-parity.md.
A paragraph whose characters differ in line metrics, in area type that is
not a rectangle or that wraps around an object, was broken line by line
with the Single-line Composer when the frame could not hold all of it.
The lines the frame holds are now composed with the whole paragraph: a
line the frame has no room for, and every line after it, is measured as
wide as the span of the last line set in the frame, less its indents.
Those lines overflow, or go on in the next threaded frame, which composes
them again at its own widths. A paragraph whose first line has no room,
and a search that passes its limits, still fall back to Single-line.
Docs: docs/mcp.md, docs/target-app-parity.md.
A radial gradient whose color line runs past 0 or 1 can get a circle
with a negative radius once its stops are normalized to 0..1. Circles of
a negative radius are not drawn: only the side of the circle of radius 0
(the tip of the cone) where the radius is positive is painted
(https://learn.microsoft.com/en-us/typography/opentype/spec/colr, Radial
gradients). Before:
- As vector art, a padded gradient with a stop before 0 and its centers
apart was focused on the start circle's center instead of the tip, and
one with its centers together got stop offsets below 0.
- Drawn into an image (a glyph with a sweep gradient, a Porter-Duff
composite or a repeating gradient), any such gradient filled the glyph
with its first stop's color.
Both now recast the circles so neither radius is negative. With pad, the
stops on the side that is not drawn become one stop at the tip with the
color there; stops at the tip stay, so a sharp change of color there
keeps the color on the drawn side. With repeat and reflect, the circles
move by whole periods of the color line to the drawn side. When no
circle is drawn, nothing is painted.
An edge that two contours of an area type frame share lies inside the
frame, and lines already run across it. Inset Spacing still kept text
clear of it, so a frame of contours that meet along an edge left a gap
of twice the inset at the seam. The inset now applies only beside the
stretches of edges that bound the frame, counted by parity as the line
spans are. A negative text wrap offset no longer shrinks a wrap object
beside an edge two of its contours share.
In area type of a shape other than a rectangle, or with text wrap, the
Single-line Composer placed each line at the metrics of its first
character and broke it in the room there. When a later character on the
line was taller, the baseline moved down by the difference without
measuring the room again, so the line could reach into a narrower part
of the frame or into a wrap object.
- A line that turns out taller than it was placed is placed again at
metrics that hold both and broken again in the room there.
- When that leaves the taller character for the next line, the line is
set at its own metrics where the room there is no narrower, and takes
the words before that character that fit there. Otherwise it stays
where it was placed.
Tests: crates/text/src/tests/combos.rs (a stepped frame and text wrap;
the two mixed-size tests now expect the Single-line Composer to break
as the Every-line Composer does there).
Docs: docs/mcp.md, docs/target-app-parity.md.
A justified line opened no gap before a right-to-left warichu block: the
glyph drawn first after the text before it is not the block's first
glyph, and it was taken as continuing the block. The block now starts at
the first of its glyphs the line draws, and blocks the bidi order
interleaves keep their starts.
The caret next to a character of a block spanned the whole line. It now
spans the band of the character's block line, as the selection does.
A glyph with a negative advance can draw a later break narrower than an
earlier one, so bisecting the breaks past the 256 measured one by one
could end a tabbed right-to-left line at an earlier break than the
latest that fits. Such a line now measures up to 1,024 breaks, or
hyphenation points, one by one before bisecting the rest.
A COLRv1 linear or radial gradient whose color line repeats or reflects
made the whole glyph an image. Such a gradient now reads into a vector
gradient with the same spread. The COLR specification repeats the
interval from the first color stop to the last, so one run of the stops
spans the gradient's vector:
https://learn.microsoft.com/en-us/typography/opentype/spec/colr
A repeating or reflecting radial gradient that starts at a circle stays
an image, and so does a repeating or reflecting gradient with a stop
whose palette index is outside the palette. A color line with an extend
value the specification does not define now pads, as the specification
says, instead of making the glyph an image.
Changing Preferences › Hyphenation › Exceptions bumped each open
document's revision, but the caches of laid-out type outside the text
crate were keyed on the font generation alone. The renderer kept the
glyph geometry, raster-effect pixels, live-effect and envelope art,
pattern tiles and placed symbol art of unchanged type objects, so
hyphenated area type kept its old line breaks on the canvas. The
hit-test art of blends and envelopes, the Fit to Artwork Bounds answer,
the layout caches of the Type and Touch Type tools and the out port's
overflow mark were keyed the same way.
vectorcraft_text::layout_inputs() returns a number that changes with
the fonts and with the hyphenation exceptions. Every one of those
caches now keys on it instead of FontDb::generation(), and envelope ink
uses it in place of the private envelope_ink_inputs(). The hit-test key
hashes it together with the plug-in revision.
Tests: a renderer that drew hyphenated area type, alone, with a drop
shadow, in a group with a Transform effect, in a symbol instance and in
an envelope, draws it as a new renderer does after the exceptions
change; the out port of selected area type shows the overflow that the
new exceptions cause. The render test helpers that run a step again
when the fonts change during it now also run it again when the
exceptions change.
Right-to-left type on a path that overflows searched for the start of its
text that fits with a binary search, which assumed that a longer start
never fits once a shorter one does not. A letter tracked to a negative
advance breaks that: with steps of 6, 6, -3 and 6 points in a 10 point
span, the first three letters fit while the first two do not, and the
search showed only the first letter.
- Without hanging punctuation, and with no spacing or on a path of one
straight segment, every start is measured in O(n log n): each glyph
keeps its place in the whole text's visual order, except the trailing
whitespace and controls that UAX #9 rule L1 sets to the paragraph's
level.
- With hanging punctuation, or spacing on a curve, when a letter has a
negative advance, a start is a candidate only when its glyphs, in its
own visual order and each at the least step it can take, reach no
farther than the path's length. This lower bound holds with negative
advances.
- At most 32 candidates are arranged from the longest. When none of
them fits, a binary search over the rest shows a start that fits,
which is not always the longest.
- With hanging punctuation, or spacing on a curve, text with no negative
advance keeps the binary search.
Right-aligned and centered type on a curve with Spacing was placed using
the width its glyphs have at the start bracket, while the steps were
measured where the line was placed, so a line that fits could end past
the end bracket and lose glyphs. It is now placed using the width of the
steps it has where it is placed.
Two contours of an area-type frame now count as meeting along a slanted
edge only when their edges lie exactly on one line, checked with an exact
cross product, and the intervals on either side of a seam join only
where both edges cross the middle of the band at the same x, found along
the same line. Before, both checks allowed a few units in the last place
of the coordinates, which near the edge of the canvas (x = 3,999,000)
is wider than a real gap of one to four units, so a line ran across the
gap outside the frame.
An edge divided by an anchor exactly on it still joins, including where
the divided edge's own crossing would round to another x.
A document's composite fonts were lent by writing them into the font
database's shared map, and a second lend of another definition of the same
name was skipped while the first was held. A document drawn in a tiled or
floating window while the front document drew, a document placed in one
that defines the name differently, and an export made while another
document is in front could draw their type in the other document's
definition. Registering the front document's fonts during a render could
also change the definition mid-render.
Lending now applies on the lending thread only: each guard pushes the
document's definitions onto a per-thread stack that lookups read before the
database's own fonts, latest loan first, and removes them when it drops,
also when the thread unwinds. The guard is neither Send nor Sync. Lending no
longer changes the database or its generation; while a thread lends
definitions other than the database's, FontDb::generation gives a number of
its own for them, so kept layouts and render caches made in one document's
definitions are not used for another's.
The help page says a wrap object's Offset may be positive or negative
(https://help.adobe.com/archive/en_US/illustrator/cs4/illustrator_cs4_help.pdf#page=307).
Text Wrap Options, the commands, the MCP tool and .ai import already
kept a negative value, but layout set it to 0.
- Layout keeps the signed offset, within -1000 to 1000 pt like the
commands and .ai import (a value that is not a number counts as 0).
- Around a wrap object, a negative offset shrinks the object by that
distance from each edge, holes included, so lines beside, above and
below it run that far into it. A shape narrower than twice the
distance no longer moves text aside. A line may get less room than
the exact shrunk shape leaves, for example where several edges come
close to one piece of the band, or where a band holds more than 64
anchor heights. It never gets less room than an offset of 0 leaves.
- With Invert Wrap, a negative offset keeps the text that far inside
the object.
- Zero and positive offsets up to 1000 pt lay out as before. A larger
positive offset lays out as 1000 pt.
- The params text of object.textWrap.make and object.textWrap.options
and the MCP text_wrap offset description give the range and what a
negative value does.
Docs: docs/target-app-parity.md.
A right-to-left line draws the text before a tab after it, but its width
was measured in the order of its text. A right-aligned line such as
"אב גד<tab>הו זח" with a stop at 150 pt in a 300 pt frame ended 5.59 pt
past the frame's right edge, and right, center and decimal stops aligned
the text before the tab instead of the text drawn after it.
- The line's width is measured in drawing order, each tab up to its stop
from where the glyphs drawn before it end. Right, Auto and centered
lines are aligned by that width. Stops are still measured from the
left edge.
- Right, center and decimal stops align the text drawn after the tab.
- Area type breaks a line with a tab where it fits as drawn, and wraps a
line that fits only in the order of its text. Once the line holds a
tab, it reads on while the least it can be drawn at fits, then ends at
the latest break that fits as drawn: up to 256 breaks are measured
from the latest back, and earlier breaks without a hyphen are
bisected. Hyphenation points are measured as drawn the same way, so
the line hyphenates at a point that fits.
- Only lines of horizontal paragraphs with right-to-left text keep a
list of their break candidates.
- A tab that ends a wrapped right-to-left line is drawn before the line
at its own width instead of pushing the line to the right.
Docs: docs/target-app-parity.md.
Type on a path whose first paragraph is aligned Justify All places its line
from the start bracket, the same as Left, so a threaded story is now measured
with the paragraphs it needs rather than the whole rest. A 1,500-paragraph
story through 40 paths aligned Justify All was laid out over 2,135,202 bytes
while measuring and is now laid out over 20,583. The frames take the same
text as before.
Center, Right, Auto right to left, hanging punctuation, Dynamic Text and
horizontal right-to-left text are still measured with the whole rest: a
centered or right-aligned line starts where the width of all its glyphs puts
it, and negative tracking can make an advance negative.
Tests compare every frame's share with the whole-rest share for Justify All
with spacing, on closed paths, with negative tracking and with punctuation
ending paragraphs.
With Invert Wrap, each piece of a line's band intersected the line's
spans so far with the spans the wrap shape holds over that piece by
comparing every pair of them. A wrap shape of many parts (a comb or a
zigzag) gives a line many spans, and with an offset the band is cut
into up to 128 pieces, so a dense shape made layout quadratic in the
number of parts for every line.
intersect_intervals now walks the two sorted lists once, stepping past
whichever interval ends first, and gives the same spans in the same
order. Tests compare it with the pairwise intersection on every list of
non-overlapping intervals with ends among seven points, check that two
interleaved lists of 3,000 and 2,000 intervals take at most 5,000
steps, and lay out a line inside a 500-tooth Invert Wrap comb with an
offset.
BFlat