gotrace's Introduction

GoTrace

Pure Go implementation of Potrace vectorization library. Supports SVG, PDF and DXF output generation.

It is a direct machine translation (transpilation) of potrace using cxgo.

Original image

Vectorized image

Installation

Tool

go install github.com/gotranspile/gotrace@latest

Usage

Convert PNG image to SVG:

gotrace -s -o ./testdata/stanford.svg ./testdata/stanford.png

Library

go get -u github.com/gotranspile/gotrace

Usage

Minimal example:

func traceImage(outPath string, img image.Image) error {
    bm := gotrace.BitmapFromImage(img, nil)
    
    paths, err := gotrace.Trace(bm, nil)
    if err != nil {
        return err
    }
    
    sz := img.Bounds().Size()
    return gotrace.RenderFile("svg", nil, outPath, paths, sz.X, sz.Y)
}

For a full example, see example_test.go.

Updating the source

This library uses cxgo to translate C source code directly to Go. See cxgo.yml for the config.

To regenerate source, install cxgo and goimports and run:

go generate

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gotrace's Issues

thankyou

Hey @dennwc

just wanted to say thank you for this package. its works very well for me.

Issue installing

The readme says go install github.com/gotranspile/gotrace@latest to install.

I've installed go and created a new folder, got a hello world go script running, but when I try to install with that command, I get that "gotrace is not a main package"

go install github.com/gotranspile/gotrace@latest
go: downloading github.com/gotranspile/gotrace v0.0.0-20230726133510-8c9665a39b09
go: downloading github.com/gotranspile/cxgo v0.3.7
package github.com/gotranspile/gotrace is not a main package

Sorry for the newbie question and thanks in advance 😄

EDIT: I also tried go get github.com/gotranspile/gotrace but got go: go.mod file not found in current directory or any parent directory.