Regression: Clip() doesn't take the correct bounding box

[nonkeltjebob]

Magick.NET version

14.13.1

Environment (Operating system, version and so on)

Q8 x64, both Linux and Windows

Description

Hi,

Clipping seems to have regressed. I have a TIFF file with a clipping path, but when clipping using that path it takes the entire image instead. See sample.

14.13.0 was still fine.

Thanks

Steps to Reproduce

using var img = new MagickImage("samples/synth_input.png");
img.Alpha(AlphaOption.Transparent);
img.Clip("Path 1");          // 14.11.1: keeps pixels inside the path. 14.13.1: masks everything.
img.Alpha(AlphaOption.Opaque);

using var canvas = new MagickImage(MagickColors.Yellow, img.Width, img.Height);
canvas.Composite(img, CompositeOperator.Over);
canvas.Write("actual.png");

Images

synth_input.png

[dlemstra]

We made some changes inside ImageMagick to fix a bug with the clipping path but that broke your code. You can get the same result with this code:

using var img = new MagickImage("samples/synth_input.png");
img.Alpha(AlphaOption.Opaque);
img.Clip("Path 1");

using var canvas = new MagickImage(MagickColors.Yellow, img.Width, img.Height);
img.Composite(canvas, CompositeOperator.Over);
img.Write("actual.png");

[nonkeltjebob]

Thanks for the quick reply!

Taking the suggested approach, the clip doesn't apply at all:

But: I think this is fixed upstream by now. This will probably fix it I think: ImageMagick/ImageMagick@3703262962. I see it's already merged into the main branch here so I'll hold off a bit until the next version is released and verify again.

Thanks again

[dlemstra]

That patch was reverted because it broke a lot of other things.

[dlemstra]

I just pushed a new patch that should solves this issue.