Snapshots: a widget as SVG or PNG

go-widgets/svg turns an RGBA buffer into a self-contained SVG: a viewBox pinned to the render’s pixel size, and the pixels as a base-64 PNG under image-rendering: pixelated. Every pixel shown is the pixel the widget drew — no re-vectorisation, no font substitution — and it stays sharp at any zoom.

// any RGBA producer
svg.Snapshot(f, surface, w, h, "my image")

// a toolkit widget
btn := toolkit.NewButton("Click me", nil)
btn.SetBounds(toolkit.Rect{W: 200, H: 40})
widget.Snapshot(f, btn, 200, 40, toolkit.DefaultLight(), "widget: button")
widget.PNG(p, btn, 200, 40, toolkit.DefaultLight())

The label becomes the SVG’s <title> and aria-label, escaped. The root package depends on nothing; the widget subpackage is separate so a consumer with its own pixel producer does not pull the toolkit into its module graph.

svg/cmd/gallery-render renders the widget catalogue, light and dark: go-widgets.github.io/svg.