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How do I create a transparent gif in Go?

when i encode gif in Go the background is black. How to make a transparent background?

Here is the code in my http handler. (w - responder)

m := image.NewRGBA(image.Rect(0, 0, pixelWidth, pixelHeight))
gif.Encode(w, m, &gif.Options{NumColors: 16})
+3


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1 answer


I read the image / gif source and found that there should only be a transparent color on your palette.



var palette color.Palette = color.Palette{
    image.Transparent,
    image.Black,
    image.White,
    color.RGBA{0, 255, 0, 255},
    color.RGBA{0, 100, 0, 255},
}

m := image.NewPaletted(image.Rect(0, 0, pixelWidth, pixelHeight), palette)
gif.Encode(w, m, &gif.Options{})
+5


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