jpeskovandClaude Opus 5.5 f4fe2d9210 fix(render): blend large CMYK groups in every tile; decline nested isolated other-space groups ...

Review of #3777 (test report by mtlcl410).

- A group wider than about 512 device pixels lost its blend mode in the
  tiles that a paint covers completely: on the bare pass canvas, vello_cpu
  fills such a tile without the blend mode. At 300 dpi, magenta then black
  with Difference drew black in the middle of the group, not green. Each
  ink pass now draws inside a layer of its own.
- A nested isolated group that names another blending space (for example
  /CS /DeviceRGB) blends in that space (ISO 32000-2 §11.3.4). The
  interpreter now tells the device about such a group
  (Device::group_blends_outside_device_cmyk), and a pass that meets one
  declines, so the enclosing group is drawn as before. A non-isolated
  group's /CS is ignored (ISO 32000-2 §11.6.6, Table 145, CS: it takes its parent's space), so
  it stays in the enclosing group's CMYK.

Test: raster::tests::isolated_cmyk_groups_blend_at_any_size_and_respect_nested_spaces.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

2026-10-28 18:20:28 -04:00

..

examples

chore: resolve SonarCloud maintainability issues (#4356)

2026-10-23 23:28:18 -04:00

src

fix(render): blend large CMYK groups in every tile; decline nested isolated other-space groups

2026-10-28 18:20:28 -04:00

tests/it

M2: a luminosity soft mask in a DeviceCMYK group converts as ISO 32000-2 10.4.2 says, so 100% K masks fully (#4423)

2026-10-25 10:02:49 -04:00

Cargo.toml

Reading colours: replace document colours for reading comfort (#897) (#1270)

2026-10-12 02:49:31 -04:00