Files
lightcraft/apps
Brandon ThomasandClaude Opus 5.5 5fd5384bfb M5.4a: instant first view — cached view render / embedded raw preview, then the full render
- engine: QuickJob — what to show the moment a photo opens: the loupe's last render for the
  current settings (kept by Session::loupe_job under a size-independent "view" key in the
  preview cache, memory + disk with a library; the disk JPEG is written off the render
  thread via PreviewCache::put_deferred), else the embedded camera JPEG of a raw that still
  has its import look (import::has_import_look), else a thumbnail-level render.
- Grid / filmstrip: an unedited raw without a thumbnail shows its cached thumbnail, else its
  embedded preview (Slot::ThumbQuick) at once; the real rendered thumbnail follows at
  background priority (same cache keys, so it still ends up matching the develop render;
  edited photos render directly).
- Loupe (detail, compare, filmstrip selection): Slot::Preview holds the stand-in until
  Slot::Main has the photo; the full render then replaces it in place (no blank frame).
- files::embedded_preview_srgb + PreviewLoader hook (desktop/CLI/MCP and web).
- ui.inspect → loupe {photo, source: render|cached|embedded|small|thumb|none, pending}.

Real app (24 MP raws, loaded machine): first image 15–90 ms (thumbnail, then embedded
preview), full render 0.2–0.5 s (was 1.0–2.4 s with nothing shown before it).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-01 09:18:50 -04:00
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