pngpal

package module

v0.1.0 Latest Latest Go to latest Published: Dec 27, 2018 License: MIT Imports: 3 Imported by: 0

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Friendly command line tool to losslessly convert a PNG to a palleted PNG if possible. It simply rejects images if it cannot be done losslessly.

Also usable as a library to convert images in general to paletted images.

PNG-24	PNG-8 (Palleted)

21kb	9kb

# Replace PNG in-place
$ pngpal file.png

# Save to new file
$ pngpal -o new.png old.png

$ go get -u -v github.com/donatj/pngpal/cmd/pngpal

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var ErrTooManyColors = fmt.Errorf("too many colors for palette")

ErrTooManyColors is returned when there is too many colors for a palleted image. E.g. Greater than 256

func ImageToPaletted(img image.Image) (*image.Paletted, error)

ImageToPaletted losslessly converts an image.Image to an image.Paletted if possible.

If the passed image.Image already is an image.Paletted it will be returned as is without modification.

If the passed image.Image contains more than 256 colors a ErrTooManyColors will be returned

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Path	Synopsis
cmd
pngpal