Question on using TransparentPaintImage

First of all thx for your great lib here.

I am basically trying to compare two images and afterwards use TransparentPaintImage to make the white parts in the diff transparent . Thats the part that is not working.. The code snippet here works perfect ... it only seems it has no effect on the image reference.

I somehow suppose the line with PixelGetPixel .. does not what i think. I tried alot but as a full noop i somehow cant exchange white with transparent pixel

On commandline or with go bindings it works ... just here i cant get it running

Do you have any idea what could be done ? Thx in advance c

See here my codesnippet:

    let mut left = MagickWand::new();
    let right = MagickWand::new();

    let left_binary: Binary = args[0].decode_as_binary()?;
    let right_binary: Binary = args[1].decode_as_binary()?;

    left.set_option("fuzz","10%").unwrap();
    left.set_option("highlight-color","red").unwrap();
    left.set_option("compose","Copy").unwrap();
    right.read_image_blob(right_binary.as_slice());
    left.read_image_blob(left_binary.as_slice());

    let (distortion, diff) =
        left.compare_images(&right, bindings::MetricType_FuzzErrorMetric);  
    let diff_image = diff.unwrap();

    diff_image.set_image_alpha_channel(bindings::AlphaChannelOption_OpaqueAlphaChannel).unwrap();
    let fuzz: f64 = 25.0;
    let mut filter2 = PixelWand::new();
    filter2.set_fuzz(fuzz);
    filter2.set_color("#FFFFFF").unwrap();
    filter2.set_alpha(1.0);
    let ei = unsafe { bindings::AcquireExceptionInfo() };
    let image = unsafe { bindings::GetImageFromMagickWand(diff_image.wand) };
    let mut pixel_info = unsafe { bindings::PixelGetPixel(filter2.wand)};

    let result = unsafe { bindings::TransparentPaintImage(image,&pixel_info,1.0,0,ei) };

    let resultwand = unsafe { bindings::NewMagickWandFromImage(image)};

nlfiedler / magick-rust

Question on using TransparentPaintImage #54