EthanSuquetandClaude Opus 5.5 7e0ed6b183 EPS import: EPS files from the reference app open as vectors ...

#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>

2026-10-07 10:06:56 -04:00

..

src

EPS import: EPS files from the reference app open as vectors

2026-10-07 10:06:56 -04:00

Cargo.toml

M4.67: TIFF export in RGB, CMYK or grayscale, with LZW, either byte order and the profile

2026-10-05 15:24:29 +07:00