An HP-GL wedge of almost no radius drawn with an adaptive line type
(LT-1;EW0.000001,0,0;) leaves a lone moveto. Fitting the dashes to its
corners indexed the empty segment list and panicked while rendering. Such
a subpath now uses the exact plan, which has no runs to fit.
Found by import_fuzz::random_hpgl_instructions_never_panic.
pattern::tests::kept_tiles_count_the_images_they_could_not_decode
draws a pattern whose art is an image three times and expects one tile
to be rasterized. A tile of art with an image is kept only while
FontDb::global().generation() is the one it was drawn at (Deps::current
in pattern.rs). The render tests that hold adding_fonts() add fonts,
which increases it (tests/fontchange.rs, tests/typeedges.rs,
tests/alternate.rs, tests/colrglyphs.rs and tests/bitmapglyphs.rs).
When one of them added a font between the frames, the next frame drew
the tile again and the test failed with left 2 or 3, right 1. Run with
the tests in tests/fontchange.rs and tests/typeedges.rs, it failed in
23 of 30 runs on main.
The test now holds fonts_steady() and takes its counts from
with_fonts_unchanged(), as the other render tests that count kept work
do. Each run builds a new document, so its first frame does not find a
tile from an earlier run. Run with the same tests, it passed in all 30
runs.
file.new refused a side over 163,830 pt, while artboard.new took larger
artboards. Both now take each side more than 0 and at most 3,999,856 pt:
the 4,000,000 pt the canvas reaches from the origin, less a 72 pt bleed
on both sides. A side outside that range is refused with an error that
names the limit in points and, when the document's units are not points,
in those units, rounded down so the value shown is accepted.
artboard.new now refuses a supplied width or height of 0 or less instead
of making a 1 pt side, and refuses a size taken from a larger artboard.
Saved and Recent presets are read with sides up to the new limit.
Follows #6643.
The Width menu now offers Tilt, Bearing and Rotation beside Fixed and
Pressure, each with the second width. Tilt goes from Width with the pen
lying flat to the second width upright; Bearing and Rotation go from
Width at -180 degrees to the second width at 180 degrees, as Scatter
Brush Options' modes do. A stroke drawn without that input is half way
between the two widths. brush.options takes width_mode tilt, bearing
or rotation.
Gujarati text from a PDF came in jumbled even with its fonts installed:
- A glyph with no advance (a vowel sign or anusvara set over its letter)
was taken for vertical type and opened as an object of its own, which
type then drew on a dotted circle. In a font the file writes
horizontally it now stays on its line.
- A line read glyph by glyph is not always the text that was set: the
file draws a vowel sign before the consonant it follows, and may not
name a conjunct. A line with characters of U+0900 to U+0DFF is now set
again and its glyphs compared with the ink the file drew; when they
differ the line keeps the file's glyphs as outlines, with a note.
Tests: crates/pdf/src/tests/reshaped.rs (two fail without the change).
Preferences > User Interface > UI Scaling sets egui's zoom factor, and the
canvas mapped one document point to one of the interface's points at
100%. A document point then covered UI Scaling times as many device pixels,
so the art grew and shrank with the interface.
The canvas now maps the document at the view's zoom divided by the UI
zoom (View::screen_zoom, Xf::at). The rendered frame, the pointer, rulers,
grids, Fit and Actual Size, pan, scroll, zoom and turn about a point, the
Zoom tool's marquee, Pixel Preview's check, tiled panes, the Navigator's
view box and the tools' tolerances use that mapping. The zoom value means
the same at every UI Scaling, and the interface still follows UI Scaling.
fit_zoom, zoom_about, rotate_about, pan_pixels and scroll_by take the UI
zoom, and Xf::new is now test-only.
Found while looking into a report by bortek about the art's size at 100%.
In a gradient or a shaded area the palette colors on either side of a band
border differ by more than the image changes across it, so pixel noise
decided where the border ran, and it was smoothed over 0.5 px like a real
edge: borders wobbled, kept stair steps and took many anchors.
Each crack between two colors now records how much of the step between
them the image makes next to it and a few pixels further out, how much the
image changes there along the line between the two colors and in any
direction, and how much it changes within each side (RGB distances, 0 to
255 a channel). A piece of outline is the contour of a smooth area when its
cracks show less than half of the step; either more of it further out, a
change along the line under 12, or no opaque pixels further out; some change
within the sides, at least 1/32 of the change along the line; and a whole change
under twice the change along the line, or under 24. Such a piece is
smoothed over 4 px (a closed one over at most an eighth of its smaller
width or height), keeps no corners, is fitted to at least 0.5 px and is
checked against its smoothed points. The values are the same from either
side of the crack.
Grayscale reads each pixel as its gray, for this rule and for every edge's
sub-pixel shift, which compared the pixels' colors with gray palette
entries.
Color traces of clean flat-color art and Black and White traces are
unchanged. Specks rise by up to 0.8 per image on gradient and photo
inputs, and Auto Color with Shapes leaves a 0.3 px gap there.
Docs: docs/target-app-parity.md, docs/image-trace-quality.md.
With one object that Start Global Edit accepts selected with the Selection
tool, the canvas now highlights the other objects a start would take with the
current Global Edit Options, before Global Edit starts. The outlines are kept
per document revision and options, and none are shown during a drag.
Docs: docs/mcp.md (Global Edit), docs/gaps.md (G5).
bflatastic