tools/README.md

使用第三方库 GraphicsMagick (https://github.com/gographics/gmagick)

export PKG_CONFIG_PATH=/opt/local/lib/pkgconfig

#安装imagick库 (https://github.com/gographics/imagick) mac os brew install ImageMagick

run 之前执行，将imagick编译 export CGO_CFLAGS_ALLOW="-Xpreprocessor"