GIF support

[ghost]

Dear Grigory Dryapak,

This is completely awesome open source code project, But it does't support GIF file.

Can you please provide GIF support for this.

Thank you.

[disintegration]

Hi,
Thank you!

What kind of gif support do you need? You can use imaging.Open to load a gif image. But you cannot use imaging.Save to save to gif file. The reason for this is that the GIF encoding was introduced in standard library with Go 1.2. And I want to keep the library compatible with older Go versions.

If you use Go version >= 1.2 you can use the standard image/gif package to save to gif format. For example (not tested):

import (
    "image/gif"
    "os"
)

func SaveGIF(img image.Image, filename string) (err error) {
    file, err := os.Create(filename)
    if err != nil {
        return
    }
    defer file.Close()
    err = gif.Encode(file, img, &gif.Options{NumColors: 256})
    return
}

[ghost]

Your example code is very helpful.
Thank you so much for your awesome support. :)

[pkieltyka]

just wondering.. but whats the point of trying to be compatible to Go versions < 1.2 .. ?

[disintegration]

To not break other people's code that depends on this library. Saving GIFs can be implemented with just a few lines of code if needed.

[ernsheong]

Is this argument still valid? It is 2019.

[disintegration]

@ernsheong The support for GIF format in Save function mentioned here was added in 2014 (c317ebd)