The import read each form's /Group /I and /K from the file in order and
matched them to the transparency groups the interpreter pushed. The
interpreter draws a group that adds nothing (full opacity, Normal, no
mask, neither flag) straight onto its parent without pushing it, so every
group after one took another group's flags. Blend steps written as a
knockout group of falling opacity then painted over each other and drew
as solid dark shapes instead of light rings.
The interpreter already reports the flags right after pushing a group
(set_knockout, set_isolated); the import now uses those and drops the
file-order list. That list was capped at 10,000 entries, past which a page
failed to import; that limit goes with it.
Patch and triangle mesh shadings of more than 4,096 patches, and strokes
painted with a mesh shading, came in as a flat grey. Illustrator writes
meshes of up to 14,355 patches, and writes a freeform gradient on a
stroke as a stroke painted with a type 7 shading.
- MAX_PATCHES is 16,384, as in the .ai editing-data reader.
- A stroke painted with a mesh shading is the meshes clipped to the area
the stroke paints (stroke_outline: width, caps, joins, miter limit and
dashes, built in the path's space and then transformed); draw_meshes
always clips a stroke's meshes.
A page drawing one form over and over made its art again for every drawing
with no limit (a 1 KB file took 877 MB), and a form decoding to 64 MiB drawn
a thousand times hung. The import now makes at most half the objects a saved
document may hold (2M, 256K on the web), leaving the rest out with a warning,
and the scan reads at most 2 GiB of form content per page before refusing it
as past the reader's limits.
Don Omondi