Function webp_picture_view

pub unsafe fn webp_picture_view(
    src: *const WebPPicture,
    left: c_int,
    top: c_int,
    width: c_int,
    height: c_int,
    dst: *mut WebPPicture,
) -> c_int

Extracts a view from ‘src’ picture into ‘dst’.

The rectangle for the view is defined by the top-left corner pixel coordinates (left, top) as well as its width and height. This rectangle must be fully be comprised inside the ‘src’ source picture. If the source picture uses the YUV420 colorspace, the top and left coordinates will be snapped to even values. Picture ‘src’ must out-live ‘dst’ picture. Self-extraction of view is allowed (‘src’ equal to ‘dst’) as a mean of fast-cropping (but note that doing so, the original dimension will be lost). Picture ‘dst’ need not be initialized with WebPPictureInit() if it is different from ‘src’, since its content will be overwritten. Returns false in case of memory allocation error or invalid parameters.