github.com/muesli/sticker

sticker

A Golang lib to generate placeholder images with text.

Installation

Make sure you have a working Go environment (Go 1.9 or higher is required). See the install instructions.

To install sticker, simply run:

go get github.com/muesli/sticker

To compile it from source:

cd $GOPATH/src/github.com/muesli/sticker
go get -u -v
go build && go test -v

Example

gen, err := sticker.NewImageGenerator(sticker.Options{
    TTFPath:         "/usr/share/fonts/TTF/Roboto-Bold.ttf",
    MarginRatio:     0.2,
    Foreground:      color.RGBA{0x96, 0x96, 0x96, 0xff},
    Background:      color.RGBA{0xcc, 0xcc, 0xcc, 0xff},
    BackgroundImage: img,
})
img, err := gen.NewPlaceholder("Lorem ipsum!", 400, 200)
...

You can also pass a []byte containing the font:

import "golang.org/x/image/font/gofont/gomono"

gen, err := sticker.NewImageGenerator(sticker.Options{
    TTF:             gomono.TTF,
    MarginRatio:     0.2,
    Foreground:      color.RGBA{0x96, 0x96, 0x96, 0xff},
    Background:      color.RGBA{0xcc, 0xcc, 0xcc, 0xff},
})

sticker will automatically pick a suitable font size, so the text will always fit neatly inside the image.

If you supply a background image, it will automatically be cropped and scaled (while maintaining its original aspect ratio) to the desired output size.

Development