| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `/root/.cargo/registry/src/github.com-1ecc6299db9ec823/image-0.23.14/./src/traits.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>traits.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../normalize.css"><link rel="stylesheet" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../ayu.css" disabled><link rel="stylesheet" href="../../dark.css" disabled><link rel="stylesheet" href="../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../storage.js"></script><script defer src="../../source-script.js"></script><script defer src="../../source-files.js"></script><script defer src="../../main.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../image/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../image/index.html"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| </pre><pre class="rust"><code><span class="doccomment">//! This module provides useful traits that were deprecated in rust |
| |
| </span><span class="comment">// Note copied from the stdlib under MIT license |
| |
| </span><span class="kw">use </span>num_traits::{Bounded, Num, NumCast}; |
| <span class="kw">use </span>std::ops::{AddAssign}; |
| |
| <span class="kw">use </span><span class="kw">crate</span>::color::{ColorType, Luma, LumaA, Rgb, Rgba, Bgr, Bgra}; |
| |
| <span class="doccomment">/// Types which are safe to treat as an immutable byte slice in a pixel layout |
| /// for image encoding. |
| </span><span class="kw">pub trait </span>EncodableLayout: seals::EncodableLayout { |
| <span class="doccomment">/// Get the bytes of this value. |
| </span><span class="kw">fn </span>as_bytes(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>[u8]; |
| } |
| |
| <span class="kw">impl </span>EncodableLayout <span class="kw">for </span>[u8] { |
| <span class="kw">fn </span>as_bytes(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>[u8] { |
| bytemuck::cast_slice(<span class="self">self</span>) |
| } |
| } |
| |
| <span class="kw">impl </span>EncodableLayout <span class="kw">for </span>[u16] { |
| <span class="kw">fn </span>as_bytes(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>[u8] { |
| bytemuck::cast_slice(<span class="self">self</span>) |
| } |
| } |
| |
| <span class="doccomment">/// Primitive trait from old stdlib |
| </span><span class="kw">pub trait </span>Primitive: Copy + NumCast + Num + PartialOrd<<span class="self">Self</span>> + Clone + Bounded {} |
| |
| <span class="kw">impl </span>Primitive <span class="kw">for </span>usize {} |
| <span class="kw">impl </span>Primitive <span class="kw">for </span>u8 {} |
| <span class="kw">impl </span>Primitive <span class="kw">for </span>u16 {} |
| <span class="kw">impl </span>Primitive <span class="kw">for </span>u32 {} |
| <span class="kw">impl </span>Primitive <span class="kw">for </span>u64 {} |
| <span class="kw">impl </span>Primitive <span class="kw">for </span>isize {} |
| <span class="kw">impl </span>Primitive <span class="kw">for </span>i8 {} |
| <span class="kw">impl </span>Primitive <span class="kw">for </span>i16 {} |
| <span class="kw">impl </span>Primitive <span class="kw">for </span>i32 {} |
| <span class="kw">impl </span>Primitive <span class="kw">for </span>i64 {} |
| <span class="kw">impl </span>Primitive <span class="kw">for </span>f32 {} |
| <span class="kw">impl </span>Primitive <span class="kw">for </span>f64 {} |
| |
| <span class="doccomment">/// An Enlargable::Larger value should be enough to calculate |
| /// the sum (average) of a few hundred or thousand Enlargeable values. |
| </span><span class="kw">pub trait </span>Enlargeable: Sized + Bounded + NumCast { |
| <span class="kw">type </span>Larger: Primitive + AddAssign + <span class="lifetime">'static</span>; |
| |
| <span class="kw">fn </span>clamp_from(n: <span class="self">Self</span>::Larger) -> <span class="self">Self </span>{ |
| <span class="comment">// Note: Only unsigned value types supported. |
| </span><span class="kw">if </span>n > NumCast::from(<span class="self">Self</span>::max_value()).unwrap() { |
| <span class="self">Self</span>::max_value() |
| } <span class="kw">else </span>{ |
| NumCast::from(n).unwrap() |
| } |
| } |
| } |
| |
| <span class="kw">impl </span>Enlargeable <span class="kw">for </span>u8 { |
| <span class="kw">type </span>Larger = u32; |
| } |
| <span class="kw">impl </span>Enlargeable <span class="kw">for </span>u16 { |
| <span class="kw">type </span>Larger = u32; |
| } |
| <span class="kw">impl </span>Enlargeable <span class="kw">for </span>u32 { |
| <span class="kw">type </span>Larger = u64; |
| } |
| |
| <span class="doccomment">/// Linear interpolation without involving floating numbers. |
| </span><span class="kw">pub trait </span>Lerp: Bounded + NumCast { |
| <span class="kw">type </span>Ratio: Primitive; |
| |
| <span class="kw">fn </span>lerp(a: <span class="self">Self</span>, b: <span class="self">Self</span>, ratio: <span class="self">Self</span>::Ratio) -> <span class="self">Self </span>{ |
| <span class="kw">let </span>a = <<span class="self">Self</span>::Ratio <span class="kw">as </span>NumCast>::from(a).unwrap(); |
| <span class="kw">let </span>b = <<span class="self">Self</span>::Ratio <span class="kw">as </span>NumCast>::from(b).unwrap(); |
| |
| <span class="kw">let </span>res = a + (b - a) * ratio; |
| |
| <span class="kw">if </span>res > NumCast::from(<span class="self">Self</span>::max_value()).unwrap() { |
| <span class="self">Self</span>::max_value() |
| } <span class="kw">else if </span>res < NumCast::from(<span class="number">0</span>).unwrap() { |
| NumCast::from(<span class="number">0</span>).unwrap() |
| } <span class="kw">else </span>{ |
| NumCast::from(res).unwrap() |
| } |
| } |
| } |
| |
| <span class="kw">impl </span>Lerp <span class="kw">for </span>u8 { |
| <span class="kw">type </span>Ratio = f32; |
| } |
| |
| <span class="kw">impl </span>Lerp <span class="kw">for </span>u16 { |
| <span class="kw">type </span>Ratio = f32; |
| } |
| |
| <span class="kw">impl </span>Lerp <span class="kw">for </span>u32 { |
| <span class="kw">type </span>Ratio = f64; |
| } |
| |
| <span class="doccomment">/// A generalized pixel. |
| /// |
| /// A pixel object is usually not used standalone but as a view into an image buffer. |
| </span><span class="kw">pub trait </span>Pixel: Copy + Clone { |
| <span class="doccomment">/// The underlying subpixel type. |
| </span><span class="kw">type </span>Subpixel: Primitive; |
| |
| <span class="doccomment">/// The number of channels of this pixel type. |
| </span><span class="kw">const </span>CHANNEL_COUNT: u8; |
| <span class="doccomment">/// Returns the number of channels of this pixel type. |
| </span><span class="attribute">#[deprecated(note=<span class="string">"please use CHANNEL_COUNT associated constant"</span>)] |
| </span><span class="kw">fn </span>channel_count() -> u8 { |
| <span class="self">Self</span>::CHANNEL_COUNT |
| } |
| |
| <span class="doccomment">/// Returns the components as a slice. |
| </span><span class="kw">fn </span>channels(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>[<span class="self">Self</span>::Subpixel]; |
| |
| <span class="doccomment">/// Returns the components as a mutable slice |
| </span><span class="kw">fn </span>channels_mut(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="kw-2">&mut </span>[<span class="self">Self</span>::Subpixel]; |
| |
| <span class="doccomment">/// A string that can help to interpret the meaning each channel |
| /// See [gimp babl](http://gegl.org/babl/). |
| </span><span class="kw">const </span>COLOR_MODEL: <span class="kw-2">&</span><span class="lifetime">'static </span>str; |
| <span class="doccomment">/// Returns a string that can help to interpret the meaning each channel |
| /// See [gimp babl](http://gegl.org/babl/). |
| </span><span class="attribute">#[deprecated(note=<span class="string">"please use COLOR_MODEL associated constant"</span>)] |
| </span><span class="kw">fn </span>color_model() -> <span class="kw-2">&</span><span class="lifetime">'static </span>str { |
| <span class="self">Self</span>::COLOR_MODEL |
| } |
| |
| <span class="doccomment">/// ColorType for this pixel format |
| </span><span class="kw">const </span>COLOR_TYPE: ColorType; |
| <span class="doccomment">/// Returns the ColorType for this pixel format |
| </span><span class="attribute">#[deprecated(note=<span class="string">"please use COLOR_TYPE associated constant"</span>)] |
| </span><span class="kw">fn </span>color_type() -> ColorType { |
| <span class="self">Self</span>::COLOR_TYPE |
| } |
| |
| <span class="doccomment">/// Returns the channels of this pixel as a 4 tuple. If the pixel |
| /// has less than 4 channels the remainder is filled with the maximum value |
| /// |
| /// TODO deprecate |
| </span><span class="kw">fn </span>channels4( |
| <span class="kw-2">&</span><span class="self">self</span>, |
| ) -> ( |
| <span class="self">Self</span>::Subpixel, |
| <span class="self">Self</span>::Subpixel, |
| <span class="self">Self</span>::Subpixel, |
| <span class="self">Self</span>::Subpixel, |
| ); |
| |
| <span class="doccomment">/// Construct a pixel from the 4 channels a, b, c and d. |
| /// If the pixel does not contain 4 channels the extra are ignored. |
| /// |
| /// TODO deprecate |
| </span><span class="kw">fn </span>from_channels( |
| a: <span class="self">Self</span>::Subpixel, |
| b: <span class="self">Self</span>::Subpixel, |
| c: <span class="self">Self</span>::Subpixel, |
| d: <span class="self">Self</span>::Subpixel, |
| ) -> <span class="self">Self</span>; |
| |
| <span class="doccomment">/// Returns a view into a slice. |
| /// |
| /// Note: The slice length is not checked on creation. Thus the caller has to ensure |
| /// that the slice is long enough to prevent panics if the pixel is used later on. |
| </span><span class="kw">fn </span>from_slice(slice: <span class="kw-2">&</span>[<span class="self">Self</span>::Subpixel]) -> <span class="kw-2">&</span><span class="self">Self</span>; |
| |
| <span class="doccomment">/// Returns mutable view into a mutable slice. |
| /// |
| /// Note: The slice length is not checked on creation. Thus the caller has to ensure |
| /// that the slice is long enough to prevent panics if the pixel is used later on. |
| </span><span class="kw">fn </span>from_slice_mut(slice: <span class="kw-2">&mut </span>[<span class="self">Self</span>::Subpixel]) -> <span class="kw-2">&mut </span><span class="self">Self</span>; |
| |
| <span class="doccomment">/// Convert this pixel to RGB |
| </span><span class="kw">fn </span>to_rgb(<span class="kw-2">&</span><span class="self">self</span>) -> Rgb<<span class="self">Self</span>::Subpixel>; |
| |
| <span class="doccomment">/// Convert this pixel to RGB with an alpha channel |
| </span><span class="kw">fn </span>to_rgba(<span class="kw-2">&</span><span class="self">self</span>) -> Rgba<<span class="self">Self</span>::Subpixel>; |
| |
| <span class="doccomment">/// Convert this pixel to luma |
| </span><span class="kw">fn </span>to_luma(<span class="kw-2">&</span><span class="self">self</span>) -> Luma<<span class="self">Self</span>::Subpixel>; |
| |
| <span class="doccomment">/// Convert this pixel to luma with an alpha channel |
| </span><span class="kw">fn </span>to_luma_alpha(<span class="kw-2">&</span><span class="self">self</span>) -> LumaA<<span class="self">Self</span>::Subpixel>; |
| |
| <span class="doccomment">/// Convert this pixel to BGR |
| </span><span class="kw">fn </span>to_bgr(<span class="kw-2">&</span><span class="self">self</span>) -> Bgr<<span class="self">Self</span>::Subpixel>; |
| |
| <span class="doccomment">/// Convert this pixel to BGR with an alpha channel |
| </span><span class="kw">fn </span>to_bgra(<span class="kw-2">&</span><span class="self">self</span>) -> Bgra<<span class="self">Self</span>::Subpixel>; |
| |
| <span class="doccomment">/// Apply the function ```f``` to each channel of this pixel. |
| </span><span class="kw">fn </span>map<F>(<span class="kw-2">&</span><span class="self">self</span>, f: F) -> <span class="self">Self |
| </span><span class="kw">where |
| </span>F: FnMut(<span class="self">Self</span>::Subpixel) -> <span class="self">Self</span>::Subpixel; |
| |
| <span class="doccomment">/// Apply the function ```f``` to each channel of this pixel. |
| </span><span class="kw">fn </span>apply<F>(<span class="kw-2">&mut </span><span class="self">self</span>, f: F) |
| <span class="kw">where |
| </span>F: FnMut(<span class="self">Self</span>::Subpixel) -> <span class="self">Self</span>::Subpixel; |
| |
| <span class="doccomment">/// Apply the function ```f``` to each channel except the alpha channel. |
| /// Apply the function ```g``` to the alpha channel. |
| </span><span class="kw">fn </span>map_with_alpha<F, G>(<span class="kw-2">&</span><span class="self">self</span>, f: F, g: G) -> <span class="self">Self |
| </span><span class="kw">where |
| </span>F: FnMut(<span class="self">Self</span>::Subpixel) -> <span class="self">Self</span>::Subpixel, |
| G: FnMut(<span class="self">Self</span>::Subpixel) -> <span class="self">Self</span>::Subpixel; |
| |
| <span class="doccomment">/// Apply the function ```f``` to each channel except the alpha channel. |
| /// Apply the function ```g``` to the alpha channel. Works in-place. |
| </span><span class="kw">fn </span>apply_with_alpha<F, G>(<span class="kw-2">&mut </span><span class="self">self</span>, f: F, g: G) |
| <span class="kw">where |
| </span>F: FnMut(<span class="self">Self</span>::Subpixel) -> <span class="self">Self</span>::Subpixel, |
| G: FnMut(<span class="self">Self</span>::Subpixel) -> <span class="self">Self</span>::Subpixel; |
| |
| <span class="doccomment">/// Apply the function ```f``` to each channel except the alpha channel. |
| </span><span class="kw">fn </span>map_without_alpha<F>(<span class="kw-2">&</span><span class="self">self</span>, f: F) -> <span class="self">Self |
| </span><span class="kw">where |
| </span>F: FnMut(<span class="self">Self</span>::Subpixel) -> <span class="self">Self</span>::Subpixel, |
| { |
| <span class="kw">let </span><span class="kw-2">mut </span>this = <span class="kw-2">*</span><span class="self">self</span>; |
| this.apply_with_alpha(f, |x| x); |
| this |
| } |
| |
| <span class="doccomment">/// Apply the function ```f``` to each channel except the alpha channel. |
| /// Works in place. |
| </span><span class="kw">fn </span>apply_without_alpha<F>(<span class="kw-2">&mut </span><span class="self">self</span>, f: F) |
| <span class="kw">where |
| </span>F: FnMut(<span class="self">Self</span>::Subpixel) -> <span class="self">Self</span>::Subpixel, |
| { |
| <span class="self">self</span>.apply_with_alpha(f, |x| x); |
| } |
| |
| <span class="doccomment">/// Apply the function ```f``` to each channel of this pixel and |
| /// ```other``` pairwise. |
| </span><span class="kw">fn </span>map2<F>(<span class="kw-2">&</span><span class="self">self</span>, other: <span class="kw-2">&</span><span class="self">Self</span>, f: F) -> <span class="self">Self |
| </span><span class="kw">where |
| </span>F: FnMut(<span class="self">Self</span>::Subpixel, <span class="self">Self</span>::Subpixel) -> <span class="self">Self</span>::Subpixel; |
| |
| <span class="doccomment">/// Apply the function ```f``` to each channel of this pixel and |
| /// ```other``` pairwise. Works in-place. |
| </span><span class="kw">fn </span>apply2<F>(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span><span class="self">Self</span>, f: F) |
| <span class="kw">where |
| </span>F: FnMut(<span class="self">Self</span>::Subpixel, <span class="self">Self</span>::Subpixel) -> <span class="self">Self</span>::Subpixel; |
| |
| <span class="doccomment">/// Invert this pixel |
| </span><span class="kw">fn </span>invert(<span class="kw-2">&mut </span><span class="self">self</span>); |
| |
| <span class="doccomment">/// Blend the color of a given pixel into ourself, taking into account alpha channels |
| </span><span class="kw">fn </span>blend(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span><span class="self">Self</span>); |
| } |
| |
| <span class="doccomment">/// Private module for supertraits of sealed traits. |
| </span><span class="kw">mod </span>seals { |
| <span class="kw">pub trait </span>EncodableLayout {} |
| |
| <span class="kw">impl </span>EncodableLayout <span class="kw">for </span>[u8] {} |
| <span class="kw">impl </span>EncodableLayout <span class="kw">for </span>[u16] {} |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="image" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
