Older GPUs without usable DirectX 12 Feature Level 12_0 or working
Vulkan support (e.g. legacy Intel iGPUs and other old parts), and old
GLES drivers whose shader compiler rejects iced's own shaders, crash
at startup or on the first drawing viewport: StagingBelt aborts in
Buffer::get_mapped_range (panic=abort, silent exit) on the DX12 path,
and shader compilation fails inside iced's gradient pipeline on the
GLES path. Selecting a working backend via WGPU_BACKEND before iced
boots avoids both classes.
- Probe each candidate backend (Windows: dx12,vulkan,gl; Linux:
vulkan,gl) in an isolated --gpu-probe child: device request,
staging-style mapped upload, render pipeline creation (its fragment
shader reads a private vec4 array, catching old-Mesa compile
failures), offscreen render and readback. First fully-passing
backend wins; explicit --backend / WGPU_BACKEND / --safe-mode
always win, and Windows keeps preferring DX12/Vulkan (#55).
- Software adapters (WARP/llvmpipe/SwiftShader) are the last resort
before a best-effort GL attempt: slow but alive.
- The crash sentinel names the attempted backend so only implicated
backends are skipped next launch.
- Winning probes report adapter limits; GPUs without shader storage
buffers get the packed compatibility renderer automatically, with
a startup command-line notice so the switch is never silent.
Builds from main reported only the release version (2026.36) even when
HEAD was hundreds of commits past the tag. build.rs now also emits
OCS_TAG_DISTANCE, OCS_COMMIT_DATE, OCS_BUILD_METADATA and
OCS_FULL_VERSION: a clean checkout of the release tag stays "2026.36",
anything else becomes "2026.36+194.gef189d77", with ".dirty" appended
for uncommitted changes and only the hash when no tag can be counted
from (shallow clone, tarball). OCS_APP_VERSION is unchanged so the
update check, donation gate, User-Agents and window title keep working.
The About dialog gains Build / Commit date / Profile cards, Copy Info,
the REPORT issue template and recovery reports carry the full version,
and `-V`/`--version` print it instead of Cargo's 2026.36.0. Release
workflows check out full history so release binaries see the tag.
Also fixes the build being marked dirty when there is no repository:
diff-index exits 128 there, not 1.
Co-Authored-By: Claude Opus 5 <[email protected]>
Double-clicking a drawing started a whole second copy of the app. Now it
lands as a tab in the editor already open, and that window comes forward.
The election is the bind itself: every GUI launch tries a deterministic
per-user loopback port, and the OS grants it to exactly one process and
releases it on any death, SIGKILL included. Nothing to reap, no PID to
probe, no stale lock after a crash. The winner serves the port from an
iced subscription; the loser checks it is talking to a matching editor,
hands the paths over and exits. Every surprise — no answer, a stranger on
the port, a timeout — boots a normal window, i.e. the old behaviour: the
feature can degrade, but it cannot lose the file.
The gate in main is positional, after every headless mode has returned.
The plugin runner is this same binary re-spawning itself, so a flag list
would rot the first time a mode is added; a position cannot.
Handing a drawing over that is already open switches to its tab instead
of loading a second copy, comparing resolved paths so a symlink or a
`..` hop is still recognised as the same file.
`opening` is a single slot that a second open would overwrite, and
on_file_opened drops any result arriving once it is clear — so drawings
handed over at once would silently vanish. They queue in pending_opens,
drained from every path that clears the slot, error and cancel included.
Exec becomes %F so one launch takes the whole selection; the CLI takes a
list and boot fans it out through the same door. --new-instance forces a
separate process; --read-only / --script / --new always get their own.
Not reused: the automation server. It dispatches arbitrary commands and
writes arbitrary paths, and its open replaces the active tab's document
in place — publishing that on a port every local process can reach would
be unforced privilege escalation. Only its JSON-lines framing is shared.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
Round-trip a raster preview through the DWG's embedded preview slot and
surface it to the OS file managers, so drawings show their contents in
Explorer / Finder / Nautilus instead of a generic document icon.
OCS:
* io::thumbnail — rasterize the scene to a BMP DIB on save (embedded via
acadrust's new Preview type) and read it back on open for the Start
page recent list; `--dwg-thumbnail IN OUT SIZE` CLI extracts a badged
PNG for external thumbnailers.
* io::file_association::install_thumbnailer — self-install the OS
integration on startup: Linux writes a .thumbnailer + hicolor mimetype
icons; Windows registers the IThumbnailProvider DLL under HKCU.
Shared core:
* crates/dwg-thumbnailer — lean (image-only) preview extractor + the
`badge_dwg` full-width "DWG" band, used by every platform so the
ribbon is single-sourced. Ships an rlib+staticlib.
* crates/dwg-thumbnailer-win — IThumbnailProvider COM in-proc server
(cfg(windows), CI-built as a workspace member).
* macos/ — QuickLook thumbnail extension (Swift + C-ABI bridge to the
core staticlib), assembled into a .appex.
Icons & packaging (single SVG source -> per-platform assets in CI):
* assets/mimetypes/image-vnd.{dwg,dxf}.svg — themed file icons.
* packaging: WiX ships dwg/dxf.ico + the thumbnail DLL and points the
ProgIds at them; Info.plist gets CFBundleTypeIconFile + the QuickLook
extension in Contents/PlugIns.
* release.yml — generate .ico (Windows) and .icns (macOS) from the SVGs,
build the QuickLook .appex, and bundle everything.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
Replace the ad-hoc `--serve` arg sniff with a clap-parsed CLI:
- positional <file> to open at startup (also the OS file-association path)
- --new, --read-only, --backend, --safe-mode/--no-gpu
- --serve/--port (headless JSON automation, unchanged behaviour)
- --export IN OUT (headless format convert via the automation load/save infra)
- --script FILE (run command lines at startup)
- --log/RUST_LOG, plus --version/--help for free
GUI-only options pass to app::boot through a OnceLock config; read-only
gates the save paths. The web build skips parsing (no args).
Co-Authored-By: Claude Opus 4.8 <[email protected]>
Karim Jerbi