jpeg does not support transparency.
On Tue, Nov 8, 2016 at 12:14 PM, <jordan.stinso...@gmail.com> wrote:
> Hi,
>
> I'm trying to write out a png with an alpha component as a jpeg. As I
> understand it, I should be able to use the draw package to do this.
>
> // src is an image.RGBA
> newImg := image.NewRGBA(src.Bounds())
>
> draw.Draw(newImg, newImg.Bounds(), &image.Uniform{color.White},
> image.Point{}, draw.Src)
> draw.Draw(newImg, newImg.Bounds(), src, src.Bounds().Min, draw.Over)
>
> return jpeg.Encode(w, newImg, &jpeg.Options{Quality: 85})
>
> I expected this blend the src rgb components with the white background
> using the alpha value. It appears to be ignoring the alpha value all
> together. Is this expected? I'm using go1.7.1.
>
> Thanks!
>
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