magickChannelFxImage method

Future<MagickWand?> magickChannelFxImage(String expression)

magickChannelFxImage() applies a channel expression to the specified image. The expression consists of one or more channels, either mnemonic or numeric (e.g. red, 1), separated by actions as follows: <=> exchange two channels (e.g. red<=>blue) => transfer a channel to another (e.g. red=>green) , separate channel operations (e.g. red, green) | read channels from next input image (e.g. red | green) ; write channels to next output image (e.g. red; green; blue) A channel without a operation symbol implies extract. For example, to create 3 grayscale images from the red, green, and blue channels of an image, use: -channel-fx "red; green; blue".

Don't forget to call destroyMagickWand on the returned MagickWand when done.

This method runs inside an isolate different from the main isolate.

• expression : the expression.

Sending invalid parameters will cause an invalid state and may crash the app, so you should make sure to validate the input to this method.

Implementation

Future<MagickWand?> magickChannelFxImage(String expression) async =>
    MagickWand._fromAddress(
      await _magickCompute(
        _magickChannelFxImage,
        _MagickChannelFxImageParams(_wandPtr.address, expression),
      ),
    );