engine · standalone Lume
The GPU 2D rendering engine under Vel.
A from-scratch renderer built on Dawn / WebGPU. Analytic SDF shapes, a FreeType glyph atlas, and a textured-image pipeline — one source rendering identically across Metal, D3D12, Vulkan and the browser. No Skia.
Lume gets its own full site soon — this is the preview.
Four pipelines, one submission order
Shapes
fill · roundedFill · stroke · circles · lines · arcs · polylines · soft shadowRect — all reduce to instanced rounded-rect SDFs with smoothstep falloff in WGSL.
Text
FreeType glyph atlas. Physical-pixel rasterization on HiDPI, OS/2 typo metrics for Skia-equivalent baselines, multi-DPR cache.
Images
stb_image decode → wgpu::Texture upload → textured-quad pipeline with Contain / Cover / Fill / None fit modes.
Batching
Submission-order draw segments — shape / line / image / text pipelines batch per submission, preserving widget z-order across pipeline switches.