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document that img handle constructors guess fmt

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This patch documents the fact that a couple of the image
handle constructors know how to guess the image format based
on the data that they are provided.

I had to dig through `iced` sources until I discovered that those
routines ultimately boil down to stuff like [image::load_from_memory][1]
from the `image` crate, so I thought I would save others the trouble
of doing the same reverse-engineering

[1]: https://docs.rs/image/0.23.4/image/fn.load_from_memory.html
This commit is contained in:
Ethan Pailes 2020-04-26 14:59:35 -04:00
parent 3f4770fd28
commit da2ab420ce
1 changed files with 4 additions and 0 deletions
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4
native/src/widget/image.rs
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@ -123,6 +123,8 @@ pub struct Handle {
impl Handle {
/// Creates an image [`Handle`] pointing to the image of the given path.
///
/// Makes an educated guess about the image format by examining the data in the file.
///
/// [`Handle`]: struct.Handle.html
pub fn from_path<T: Into<PathBuf>>(path: T) -> Handle {
Self::from_data(Data::Path(path.into()))
@ -145,6 +147,8 @@ impl Handle {
/// Creates an image [`Handle`] containing the image data directly.
///
/// Makes an educated guess about the image format by examining the given data.
///
/// This is useful if you already have your image loaded in-memory, maybe
/// because you downloaded or generated it procedurally.
///