Golang を使用して画像を SVG ベクター グラフィックスに変換する方法

go get -u github.com/fogleman/gg
go get -u github.com/ajstarks/svgo

import (
    "fmt"
    "image"
    "os"

    _ "image/jpeg"
    _ "image/png"
)

func loadImage(path string) (image.Image, error) {
    file, err := os.Open(path)
    if err != nil {
        return nil, err
    }
    defer file.Close()

    img, _, err := image.Decode(file)
    if err != nil {
        return nil, err
    }

    return img, nil
}

func convertToSVG(img image.Image, outputPath string) error {
    width := img.Bounds().Size().X
    height := img.Bounds().Size().Y

    canvas := svg.New(os.Stdout)
    canvas.Start(width, height)
    canvas.Rect(0, 0, width, height)
    canvas.Image(0, 0, width, height, outputPath, "preserveAspectRatio='none'")
    canvas.End()

    file, err := os.Create(outputPath)
    if err != nil {
        return err
    }
    defer file.Close()

    canvas := svg.New(file)
    canvas.Start(width, height)
    canvas.Rect(0, 0, width, height)

    for y := 0; y < height; y++ {
        for x := 0; x < width; x++ {
            r, g, b, a := img.At(x, y).RGBA()
            canvas.RGBA((x*100)+50, (y*100)+50, 50, 50, r, g, b, a)
        }
    }

    canvas.End()
    return nil
}

func main() {
    img, err := loadImage("input.jpg")
    if err != nil {
        fmt.Println("Failed to load image:", err)
        return
    }

    err = convertToSVG(img, "output.svg")
    if err != nil {
        fmt.Println("Failed to convert image to SVG:", err)
        return
    }

    fmt.Println("Image successfully converted to SVG.")
}