lambda/svg-conv.go

package main

import (
	"bytes"
	"fmt"
	"github.com/srwiley/oksvg"
	"github.com/srwiley/rasterx"
	"image"
	"image/png"
)

func SVGToPNG(svgData []byte) ([]byte, error) {
	// Parse SVG
	icon, err := oksvg.ReadIconStream(bytes.NewReader(svgData))
	if err != nil {
		return nil, fmt.Errorf("failed to parse SVG: %w", err)
	}

	w := int(icon.ViewBox.W)
	h := int(icon.ViewBox.H)
	if w == 0 || h == 0 {
		w, h = 100, 100
	}

	// Rasterize into an RGBA image
	rgba := image.NewRGBA(image.Rect(0, 0, w, h))
	scanner := rasterx.NewScannerGV(w, h, rgba, rgba.Bounds())
	dasher := rasterx.NewDasher(w, h, scanner)

	icon.SetTarget(0, 0, float64(w), float64(h))
	icon.Draw(dasher, 1.0)

	// Encode to PNG bytes
	var buf bytes.Buffer
	if err := png.Encode(&buf, rgba); err != nil {
		return nil, fmt.Errorf("failed to encode PNG: %w", err)
	}

	return buf.Bytes(), nil
}