go-mathtex

This is a Go package that allows rendering LaTeX documents to images using mathTeX. Also parse LaTeX expression and check for dangerous commands and add some instructions for proper rendering.

Before install

At first of all, you must install texlive package, follow the instructions below to install TeX Live on Debian-based linux.

sudo apt-get update && apt-get install -y --no-install-recommends texlive-full

Then compile mathtex to binary, follow the instructions below.

git clone https://github.com/dotzero/go-mathtex
cd go-mathtex/mathtex
make png \
    BIN_PATH=/usr/local/bin/mathtex \
    PATH_CACHE=/var/lib/mathtex/cache/ \
    PATH_WORK=/var/lib/mathtex/work/

This commands will compile mathtex to /usr/local/bin/mathtex and also create two dirs /var/lib/mathtex/cache and /var/lib/mathtex/work. If you prefer to render SVG instead of PNG, then follow the instructions below.

git clone https://github.com/dotzero/go-mathtex
cd go-mathtex/mathtex
make svg \
    BIN_PATH=/usr/local/bin/mathtex \
    PATH_CACHE=/var/lib/mathtex/cache/ \
    PATH_WORK=/var/lib/mathtex/work/

Install

go get github.com/dotzero/go-mathtex

Usage

package main

import (
    "log"

    mathtex "github.com/dotzero/go-mathtex"
)

func main() {
    mathtex.MathtexPath = "/var/www/mathtex.cgi" // path to mathtex binary
    mathtex.MathtexCachePath = "/var/www/cache/" // path to mathtex cache files
    mathtex.MathtexWorkPath = "/var/www/work/" // path to mathtex work files
    mathtex.MathtexMsgLevel = "0" // mathtex message level
    mathtex.MathtexOutputExt = "png" // mathtex output file extenstion

    expr := `x^2+y^2`

    // Check for pre-rendered file
    if filename, err := mathtex.CheckRenderCache(expr); err == nil {
        log.Printf("Mathtex pre-rendered file: %s\n", filename)
        return
    }

    // Pre-rendered file not found, try to render it
    filename, err := mathtex.RenderImage(expr)
    if err != nil {
        log.Fatalln("Mathtex error: " + err.Error())
        return
    }
    log.Printf("Mathtex rendered file: %s\n", filename)
}

Licenses

• mathTeX: GNU GPL
• go-mathtex: MIT