- A PostScript font name's shortened style words (Md, Lt, Bd, XBd, Cn, It, ...)
weren't matched to installed faces, so AkzidenzGroteskPro-Md came in as
the condensed face. They are spelled out before the face is looked up.
- A line the page draws in pieces (around kerning) came in as several text
objects ("swe", "ep"); the pieces that add up to one line of the file's
text object now join into one, with the line's spaces between them.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
A program that re-encodes a font in an EPS sets the copy under a name with a
`*<n>` suffix (`KBKNNM+RollerBabyBV*1`). The suffix was part of the family
name, so the installed font was never found and text fell back to a
substitute. The suffix is dropped when `*` is followed only by digits.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Discord feedback: "EPS files are always rasterized: they open as bitmaps, in
other programs as vectors". Every EPS saved by Illustrator 2026 fell back to
its TIFF preview (`gcheck` was unknown), and cairo/Inkscape files stopped at
their first image (`status`), dropped masked images (ImageType 3) and failed
on mesh gradients; the warning didn't say where the program failed.
Fallback never silent:
- The warning names the PostScript error, the operator that raised it and
the named procedures it ran in, innermost first ("a PostScript error
(typecheck in `add`), in `inner` in `outer`"); errors caught by `stopped`
aren't reported. It reaches the status bar, document.open, app.open and
file.open (which now return document.open's result, so MCP's open_file over
the control channel gets it), and `vectorcraft-cli info` ("warnings").
- A file whose PostScript can't be read opens as its TIFF preview, else its
Windows metafile preview (as vectors, scaled to the bounding box), else its
EPSI bitmap. es @msg rows for the new messages.
Interpreter:
- Operators programs probe or use: gcheck/scheck, rootfont,
currentcolorrendering, currenthsbcolor, status, token, read,
bytesavailable, fileposition/setfileposition, resetfile, write*, pdfmark
(marks dropped, as Ghostscript does), execform, nulldevice, strokepath,
pathforall, user paths (ufill/ueofill/ustroke/uappend/upath/setbbox, the
encoded form too), setcachedevice2, findcolorrendering, cache, device and
VM queries, revision; (%stdout) (w) file gives a sink.
- `//name` is replaced by its value when read, inside procedures too.
- Tiling patterns become pattern swatches (their PaintProc drawn in pattern
space, one cell; uncoloured ones in the colour under them; makepattern
copies share one swatch); nested patterns stop at 8 levels.
- Type 3 fonts draw their glyphs (BuildGlyph/BuildChar, widths from
setcachedevice/setcharwidth) as outlines grouped per string, spaced by
ashow/widthshow/awidthshow/xshow/yshow/xyshow/kshow; glyphshow and
stringwidth/cshow use them.
- Shadings of types 1 and 4-7 become gradient meshes (data from arrays,
strings or files, packed or not, flags sharing edges), as fills through a
shading pattern too; sampled functions (type 0) are evaluated;
GradientMesh::coons/triangle are shared with PDF import.
- ImageType 3 masked images, interleaved by sample, by row or in separate
sources; ReusableStreamDecode reads its data when made; Flate/LZW PNG and
TIFF predictors.
- Bounded: DeviceN at 32 inks, sampled functions at 2^24 samples and 32
outputs, 4096 patches a shading, strokepath ignores dashes finer than 1e5
pieces, Type 3 glyphs nest 8 deep (a glyph that shows itself overflowed the
stack before the limit), 64-bit index maths for 32-bit targets.
Tests: a synthetic program per generator (cairo/Inkscape, its Type 3 fonts,
matplotlib, CorelDRAW, Affinity, LibreOffice, Ghostscript eps2write,
Illustrator procsets), meshes and function shadings, masked images, fault
messages, probing operators, metafile/EPSI previews, `//name`, user paths,
hostile patterns/glyphs/shadings (run against main, 12 of the 14 generator
and feature tests fail; CorelDRAW- and LibreOffice-style programs already
read there). The import fuzz vocabulary covers the new operators. Checked
against real files made here with Inkscape 1.4 (cairo) and Illustrator 2026
(its own format and the CS-to-CC compatibility formats; all fell back or
stopped early on main and open as vectors now; its Illustrator 8 format
needs the next commit); those files aren't committed.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Laying out type (show, stringwidth, cshow) costs about 300 operations plus
64 a character, measured, and now counts that much against MAX_OPS: a
300-byte file running cshow over a 4 MB string took 60 s, and
{ (a) stringwidth pop pop } loop ran for over 5 minutes (already the case on
main); both now stop with "the program runs too long" within seconds.
Tests: executable filters run inside themselves stop at the nesting limit
(directly, mutually and under stopped), currentfile cvx exec runs nothing
twice, cshow over a long string is refused; the hostile PostScript fuzz
tokens gain self-recursive filter execution, currentfile filters, cvlit and
cshow.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
#249 made the reduced repros of #234 open, but a real file saved by the
reference app (version 30) still fell back to its screen-resolution preview
with "typecheck in `a dictionary`". Running its prolog to the end needed:
- The standard dictionaries (systemdict, userdict, globaldict, statusdict,
errordict, $error) as values in systemdict, so `/globaldict where
{ /globaldict get begin } if` gets a dictionary, not an operator.
SharedFontDirectory names the font directory too. errordict has a
handleerror for prologs that wrap it.
- `dictstack`, `internaldict`, `currentsystemparams` and
`currentuserparams` (with the cache sizes programs `get`), and `cshow`.
- Executable files: `cvx` and `cvlit` set a file's attribute, `xcheck`
reads it, and executing one runs its data as a program, as the prolog
does with `(...) 0 () /SubFileDecode filter cvx exec`.
- SubFileDecode with a count of 0 and an empty end string passes its
whole source through instead of nothing.
- `flushfile` on a filter over the program's data skips that data (the
file's XMP packet). A filter chained from a pending one leaves it
nothing to skip, so the writer's own `VCsrc flushfile` is unchanged.
The interpreter empties its standard dictionaries when it finishes, since
systemdict now holds itself. Both real files tested now import as 15
vector paths in CMYK with no warnings, and round-trip through SVG and PDF
pixel for pixel. The EPS fuzzer exercises the new operators.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
EPS files the reference app saves (its procsets in the prolog, a binary header with a TIFF
preview) now open as editable art instead of failing with "undefinedresource in Generic". When
their PostScript still can't be read, the palette preview they carry is placed with the usual
warning instead of the file being refused.
Root cause: five interpreter gaps and one preview format. The Generic and Category resource
categories didn't exist, so categories couldn't be made from Generic (now Category holds the
standard categories, defineresource in Category makes new ones, undefineresource is added);
clipsave/cliprestore were unknown (now a clip stack in the graphics state); systemdict's
languagelevel was the operator, not the integer 3; getinterval copied arrays and strings
instead of sharing their storage, so astore into a subarray was lost (arrays and strings are
now views into shared storage, and readstring/readline return the part they fill); and
resourceforall was unknown (now enumerates matching names with * ? \ templates). The preview
is an 8-bit palette TIFF with an alpha sample, which the image crate can't decode: a small
bounds-checked reader handles that layout (either byte order, any strips).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Opening, placing, pasting or importing a file, the font menus and MCP now find
the installed system fonts (Arial, Times New Roman...) in a fresh session, so a
file renders the same whatever happened earlier, and PDF import keeps the real
family names (Microsoft YaHei, not "Microsoft Ya Hei").
Root cause: FontDb only consulted the system font catalog, which stayed empty
until a CJK fallback or Character panel > Show System Fonts happened to scan
the font folders. Every lookup by family name (face, families, styles,
has_family) now waits for one cataloging scan per session: the app starts it
in the background, other processes run it on first use. The scan reads only
each file's table directory and name table (about 70 ms for 780 faces here,
instead of reading every font file whole), the catalog is indexed by family,
the family list is cached, and an installed style of a loaded family (a
bundled family also installed with more weights) loads when asked for.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
document.open and file.place read .eps files and PostScript by any name
(PostScript .ai opens as artwork, .ait as a new untitled document). An EPS
file VectorCraft wrote restores the document it carries (restored: true);
other files run through a small clean-room PostScript interpreter (paths,
colours and spot inks, gsave/grestore, concat, line state, bind def,
procedures, loops and dictionaries, clips, shadings, images through the
decoding filters, type as point type), and fall back to their TIFF preview
with a warning when the program can't be read. Operation, nesting, memory
and path budgets keep hostile files from hanging or exhausting memory.
The clipping-group nesting the metafile reader used moves to
vectorcraft_doc::clipnest, shared by both readers.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
