how do you apply a crop on the target buffer?

[TroyKomodo]

Previously in older versions we used to be able to provide a crop on both the input and output buffer in the resize function.

if i want to take a subsection of a source image and then impose it upon the dest image at a different sub section.

[TroyKomodo]

view.set_crop_box(crop)?;

let mut target_view = if resize_dims != output_dims {
	target_image.view_mut().crop(left, top, width, height)?
} else {
	target_image.view_mut()
};

resizer.resize(&view, &mut target_view)?;

[Cykooz]

In the new version you have to use CroppedImageMut or TypedCroppedImageMut wrapper for destination image.

use fast_image_resize::images::CroppedImageMut;

let mut cropped_dst_image = CroppedImageMut::new(
    &mut dst_image, 
    dst_left, 
    dst_top, 
    dst_width,
    dst_height,
).unwrap();

let mut resizer = fr::Resizer::new();
resizer
    .resize(
        &src_image,
        &mut cropped_dst_image,
        &ResizeOptions::new().crop(src_left, src_top, src_width, src_height),
    )
    .unwrap();

[TroyKomodo]

I see thank you, is there a difference to applying a crop on the resize options vs submitting a CroppedImage as the source?

[Cykooz]

ResizeOptions uses f64 type for crop parameters. It allows you to prevent proportions distortion.
Also, cropping with ResizeOptions can use pixels outside the crop box if needed for the convolution process in areas near the edges of the crop box.