Lightningbeam/lightningbeam-ui/lightningbeam-core
Skyler Lehmkuhl 318720f89d Fix gamma handling and improve brush canvas performance
Color correctness:
- Unpremultiply before the sRGB OETF on the display and export blits;
  encoding premultiplied color corrupted antialiased/transparent edges.
- Tag exported video as full-range BT.709 (matrix/primaries/transfer).
- Run perception effects (invert, brightness/contrast, hue/saturation)
  in gamma space to match standard editors.
- Interpolate gradients in gamma space across the raster and vector paths.
- Render effect thumbnails in the same linear space as the live pipeline.

Brush performance:
- Store the raster canvas as Rgba16Float (no shadow banding from 8-bit
  linear), with an incremental per-tile ping-pong sync replacing the
  per-frame full-canvas copy.
- Do the linear->sRGB readback conversion on the GPU and reuse a cached
  scratch texture, dropping a ~110ms-per-stroke CPU decode.

Cleanup:
- Single COLOR_WGSL prelude and shared CPU sRGB scalars instead of ~8
  duplicated copies of the transfer functions.
- Shared compute-pipeline builder; smudge folded onto the tile-sync path.
2026-06-16 08:32:39 -04:00
..
src Fix gamma handling and improve brush canvas performance 2026-06-16 08:32:39 -04:00
tests Change vector drawing primitive from shape to doubly-connected edge graph 2026-02-23 21:29:58 -05:00
Cargo.toml Double CPU performance by using tiny-skia instead of vello CPU 2026-03-13 18:52:37 -04:00