gpui

Sonora's fork of GPUI, the GPU-accelerated UI framework behind Zed. Everything below works on wgpu, Metal and DirectX.

What the fork adds

• Shapes and shadows

  • Styled::corner_smoothing and Styled::squircle for squircle corners
  • Styled::text_shadow for CSS-style text shadows
  • Box shadows clipped to outside their element

• Blur and layers

  • Styled::blur blurs an element and its subtree as a layer
  • Styled::backdrop_blur, like CSS backdrop-filter: blur()
  • Styled::fade_edges and Styled::fade_sides fade a layer at its edges
  • Dual Kawase blur, with a Gaussian for small radii
  • Neighbouring layers with the same filter merge into one pass
  • GPUI_FILTERS=0 turns layer filters off

• Paint-only transforms

  • Styled::layer_scale and Styled::layer_scale_origin
  • Styled::layer_translate, which leaves layout and hitboxes alone
  • Fractional values for smooth spring animations

• Pixel snapping

  • Window::with_pixel_snapping keeps a subtree off the pixel grid

• Text

  • Requested font weights honoured in cosmic-text
  • Variable-font wght axis
  • Weight-aware font fallback
  • Colour emoji detection and rendering
  • ClearType text inside layers on Windows and wgpu

• Memory

  • Offscreen targets allocated on first use and freed when idle
  • Instance buffers shrink after a quiet period on wgpu and Metal
  • Atlas tiles written straight to the wgpu queue

• App and windows

  • App::hide_cursor hides the cursor until the mouse moves
  • Window controls keep their hitboxes in cached views
  • Explicitly sized images keep their size
  • Wayland edges kept off half device pixels, and better fractional scaling

• Profiling and debugging

  • GPUI_DEBUG_OVERLAY=minimal|full for frame timings and view statistics
  • GPUI_SHOW_REPAINTS=1 highlights what each frame redraws
  • GPUI_LOG_NOTIFIES=1 logs notifies and re-renders

Licence

Apache-2.0, inherited from Zed. See LICENSE-APACHE.