Issues

• Glyph runs cast one shadow per glyph, or none

  femtovg/femtovg#395 · Filter by author jfarmer opened on Oct 10, 2026
  1

• mix-blend-mode: plus-lighter has no BlendMode for a layer

  femtovg/femtovg#379 · Filter by author matthargett opened on Oct 3, 2026

• Gradient interpolation in linearRGB (color-interpolation) is not available

  femtovg/femtovg#378 · Filter by author matthargett opened on Oct 3, 2026

• WGPU: one command buffer per frame holds ~2.3 MiB of Metal driver memory per render pass; a 176-layer frame is jetsammed on iPhone 12

  femtovg/femtovg#367 · Filter by author matthargett opened on Sep 28, 2026
  2

• Exact-coverage fills on the OpenGL backend

  femtovg/femtovg#357 · Filter by author matthargett opened on Sep 23, 2026

• Transient (memoryless) stencil attachments for layer stores on Apple GPUs

  femtovg/femtovg#352 · Filter by author matthargett opened on Sep 23, 2026

• Renderer-wide memory accounting and a per-frame degradation policy for filtered layers on small budgets

  femtovg/femtovg#351 · Filter by author matthargett opened on Sep 22, 2026

• Gradient cache ordering is not total: a NaN stop offset aliases another gradient's ramp

  femtovg/femtovg#350 · Filter by author matthargett opened on Sep 22, 2026

• Bound turbulence lattice uploads: each distinct seed in a frame holds 512 KiB until the flush

  femtovg/femtovg#349 · Filter by author matthargett opened on Sep 22, 2026

• Bound clip geometry and replay work: alternating restore/draw replays the clip stack per draw

  femtovg/femtovg#348 · Filter by author matthargett opened on Sep 22, 2026

• Stencil winding wraps at 256 overlaps, at 128 under a clip: coincident contours leave a hole

  femtovg/femtovg#347 · Filter by author matthargett opened on Sep 22, 2026

• SVG filter primitive coverage: feTurbulence and friends, and what happens to a filter a backend cannot run

  femtovg/femtovg#337 · Filter by author matthargett opened on Sep 6, 2026
  1

• Thin filled shapes render bolder than browser coverage AA (fringe overlap on sub-pixel fills)

  femtovg/femtovg#327 · Filter by author matthargett opened on Aug 21, 2026
  3

• geometry::Bounds returned by a public method but in a private module

  femtovg/femtovg#315 · Filter by author mattly opened on Aug 16, 2026

• Glyph artifacts on VideoCore IV (GLES2): atlas neighbor bleed at margin 1, and frozen stray pixels from the >92 px direct path

  femtovg/femtovg#310 · Filter by author fuzzy1450 opened on Aug 4, 2026
  2

• wgpu backend costs ~0.5ms of GPU-process time per drawn element on wasm

  femtovg/femtovg#305 · Filter by author yebei199 opened on Jul 19, 2026

• WGPU renderer panics uploading an HtmlImageElement whose attributes exceed its natural size

  femtovg/femtovg#299 · Filter by author yebei199 opened on Jul 18, 2026
  1

• Survey: text/transform precision tradeoffs vs Chrome/NanoVG references

  femtovg/femtovg#283 · Filter by author matthargett opened on May 29, 2026

• font rendering is poor

  femtovg/femtovg#233 · Filter by author flukejones opened on Feb 15, 2025
  8

• Basic tutorials

  femtovg/femtovg#230 · Filter by author wangjiawen2013 opened on Jan 7, 2025
  1

• How to measure font height from FontMetrics?

  femtovg/femtovg#228 · Filter by author gabm opened on Jan 3, 2025

• Expose font types to be able to measure font/text metrics without Canvas/TextContext

  femtovg/femtovg#217 · Filter by author heyimtony opened on Oct 2, 2024
  1

• Unexpected text rendering with punctuation (no text wrap types support)

  femtovg/femtovg#216 · Filter by author lmaxyz opened on Sep 30, 2024
  2

• Example in book does not build

  femtovg/femtovg#212 · Filter by author martinellison opened on Aug 28, 2024
  2

• Handling of stride in images

  bug
  femtovg/femtovg#201 · Filter by author gabm opened on Feb 26, 2024