| <!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/git/checkouts/incubator-teaclave-crates-c8106113f74feefc/ede1f68/image/./src/imageops/affine.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>affine.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">//! Functions for performing affine transformations. |
| |
| </span><span class="kw">use </span><span class="kw">crate</span>::ImageBuffer; |
| <span class="kw">use </span><span class="kw">crate</span>::image::{GenericImage, GenericImageView}; |
| <span class="kw">use </span><span class="kw">crate</span>::error::{ImageError, ParameterError, ParameterErrorKind}; |
| <span class="kw">use </span><span class="kw">crate</span>::traits::Pixel; |
| |
| <span class="doccomment">/// Rotate an image 90 degrees clockwise. |
| </span><span class="kw">pub fn </span>rotate90<I: GenericImageView>( |
| image: <span class="kw-2">&</span>I, |
| ) -> ImageBuffer<I::Pixel, Vec<<I::Pixel <span class="kw">as </span>Pixel>::Subpixel>> |
| <span class="kw">where </span>I::Pixel: <span class="lifetime">'static</span>, |
| { |
| <span class="kw">let </span>(width, height) = image.dimensions(); |
| <span class="kw">let </span><span class="kw-2">mut </span>out = ImageBuffer::new(height, width); |
| <span class="kw">let _ </span>= rotate90_in(image, <span class="kw-2">&mut </span>out); |
| out |
| } |
| |
| <span class="doccomment">/// Rotate an image 180 degrees clockwise. |
| </span><span class="kw">pub fn </span>rotate180<I: GenericImageView>( |
| image: <span class="kw-2">&</span>I, |
| ) -> ImageBuffer<I::Pixel, Vec<<I::Pixel <span class="kw">as </span>Pixel>::Subpixel>> |
| <span class="kw">where </span>I::Pixel: <span class="lifetime">'static</span>, |
| { |
| <span class="kw">let </span>(width, height) = image.dimensions(); |
| <span class="kw">let </span><span class="kw-2">mut </span>out = ImageBuffer::new(width, height); |
| <span class="kw">let _ </span>= rotate180_in(image, <span class="kw-2">&mut </span>out); |
| out |
| } |
| |
| <span class="doccomment">/// Rotate an image 270 degrees clockwise. |
| </span><span class="kw">pub fn </span>rotate270<I: GenericImageView>( |
| image: <span class="kw-2">&</span>I, |
| ) -> ImageBuffer<I::Pixel, Vec<<I::Pixel <span class="kw">as </span>Pixel>::Subpixel>> |
| <span class="kw">where </span>I::Pixel: <span class="lifetime">'static</span>, |
| { |
| <span class="kw">let </span>(width, height) = image.dimensions(); |
| <span class="kw">let </span><span class="kw-2">mut </span>out = ImageBuffer::new(height, width); |
| <span class="kw">let _ </span>= rotate270_in(image, <span class="kw-2">&mut </span>out); |
| out |
| } |
| |
| <span class="doccomment">/// Rotate an image 90 degrees clockwise and put the result into the destination [`ImageBuffer`]. |
| </span><span class="kw">pub fn </span>rotate90_in<I, Container>( |
| image: <span class="kw-2">&</span>I, |
| destination: <span class="kw-2">&mut </span>ImageBuffer<I::Pixel, Container> |
| ) -> <span class="kw">crate</span>::ImageResult<()> <span class="kw">where |
| </span>I: GenericImageView, |
| I::Pixel: <span class="lifetime">'static</span>, |
| Container: std::ops::DerefMut<Target = [<I::Pixel <span class="kw">as </span>Pixel>::Subpixel]> |
| { |
| <span class="kw">let </span>((w0, h0), (w1, h1)) = (image.dimensions(), destination.dimensions()); |
| <span class="kw">if </span>w0 != h1 || h0 != w1 { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(ImageError::Parameter(ParameterError::from_kind( |
| ParameterErrorKind::DimensionMismatch, |
| ))); |
| } |
| |
| <span class="kw">for </span>y <span class="kw">in </span><span class="number">0</span>..h0 { |
| <span class="kw">for </span>x <span class="kw">in </span><span class="number">0</span>..w0 { |
| <span class="kw">let </span>p = image.get_pixel(x, y); |
| destination.put_pixel(h0 - y - <span class="number">1</span>, x, p); |
| } |
| } |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="doccomment">/// Rotate an image 180 degrees clockwise and put the result into the destination [`ImageBuffer`]. |
| </span><span class="kw">pub fn </span>rotate180_in<I, Container>( |
| image: <span class="kw-2">&</span>I, |
| destination: <span class="kw-2">&mut </span>ImageBuffer<I::Pixel, Container> |
| ) -> <span class="kw">crate</span>::ImageResult<()> <span class="kw">where |
| </span>I: GenericImageView, |
| I::Pixel: <span class="lifetime">'static</span>, |
| Container: std::ops::DerefMut<Target = [<I::Pixel <span class="kw">as </span>Pixel>::Subpixel]> |
| { |
| <span class="kw">let </span>((w0, h0), (w1, h1)) = (image.dimensions(), destination.dimensions()); |
| <span class="kw">if </span>w0 != w1 || h0 != h1 { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(ImageError::Parameter(ParameterError::from_kind( |
| ParameterErrorKind::DimensionMismatch, |
| ))); |
| } |
| |
| <span class="kw">for </span>y <span class="kw">in </span><span class="number">0</span>..h0 { |
| <span class="kw">for </span>x <span class="kw">in </span><span class="number">0</span>..w0 { |
| <span class="kw">let </span>p = image.get_pixel(x, y); |
| destination.put_pixel(w0 - x - <span class="number">1</span>, h0 - y - <span class="number">1</span>, p); |
| } |
| } |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="doccomment">/// Rotate an image 270 degrees clockwise and put the result into the destination [`ImageBuffer`]. |
| </span><span class="kw">pub fn </span>rotate270_in<I, Container>( |
| image: <span class="kw-2">&</span>I, |
| destination: <span class="kw-2">&mut </span>ImageBuffer<I::Pixel, Container> |
| ) -> <span class="kw">crate</span>::ImageResult<()> <span class="kw">where |
| </span>I: GenericImageView, |
| I::Pixel: <span class="lifetime">'static</span>, |
| Container: std::ops::DerefMut<Target = [<I::Pixel <span class="kw">as </span>Pixel>::Subpixel]> |
| { |
| <span class="kw">let </span>((w0, h0), (w1, h1)) = (image.dimensions(), destination.dimensions()); |
| <span class="kw">if </span>w0 != h1 || h0 != w1 { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(ImageError::Parameter(ParameterError::from_kind( |
| ParameterErrorKind::DimensionMismatch, |
| ))); |
| } |
| |
| <span class="kw">for </span>y <span class="kw">in </span><span class="number">0</span>..h0 { |
| <span class="kw">for </span>x <span class="kw">in </span><span class="number">0</span>..w0 { |
| <span class="kw">let </span>p = image.get_pixel(x, y); |
| destination.put_pixel(y, w0 - x - <span class="number">1</span>, p); |
| } |
| } |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="doccomment">/// Flip an image horizontally |
| </span><span class="kw">pub fn </span>flip_horizontal<I: GenericImageView>( |
| image: <span class="kw-2">&</span>I, |
| ) -> ImageBuffer<I::Pixel, Vec<<I::Pixel <span class="kw">as </span>Pixel>::Subpixel>> |
| <span class="kw">where </span>I::Pixel: <span class="lifetime">'static</span>, |
| { |
| <span class="kw">let </span>(width, height) = image.dimensions(); |
| <span class="kw">let </span><span class="kw-2">mut </span>out = ImageBuffer::new(width, height); |
| <span class="kw">let _ </span>= flip_horizontal_in(image, <span class="kw-2">&mut </span>out); |
| out |
| } |
| |
| <span class="doccomment">/// Flip an image vertically |
| </span><span class="kw">pub fn </span>flip_vertical<I: GenericImageView>( |
| image: <span class="kw-2">&</span>I, |
| ) -> ImageBuffer<I::Pixel, Vec<<I::Pixel <span class="kw">as </span>Pixel>::Subpixel>> |
| <span class="kw">where </span>I::Pixel: <span class="lifetime">'static</span>, |
| { |
| <span class="kw">let </span>(width, height) = image.dimensions(); |
| <span class="kw">let </span><span class="kw-2">mut </span>out = ImageBuffer::new(width, height); |
| <span class="kw">let _ </span>= flip_vertical_in(image, <span class="kw-2">&mut </span>out); |
| out |
| } |
| |
| <span class="doccomment">/// Flip an image horizontally and put the result into the destination [`ImageBuffer`]. |
| </span><span class="kw">pub fn </span>flip_horizontal_in<I, Container>( |
| image: <span class="kw-2">&</span>I, |
| destination: <span class="kw-2">&mut </span>ImageBuffer<I::Pixel, Container> |
| ) -> <span class="kw">crate</span>::ImageResult<()> <span class="kw">where |
| </span>I: GenericImageView, |
| I::Pixel: <span class="lifetime">'static</span>, |
| Container: std::ops::DerefMut<Target = [<I::Pixel <span class="kw">as </span>Pixel>::Subpixel]> |
| { |
| <span class="kw">let </span>((w0, h0), (w1, h1)) = (image.dimensions(), destination.dimensions()); |
| <span class="kw">if </span>w0 != w1 || h0 != h1 { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(ImageError::Parameter(ParameterError::from_kind( |
| ParameterErrorKind::DimensionMismatch, |
| ))); |
| } |
| |
| <span class="kw">for </span>y <span class="kw">in </span><span class="number">0</span>..h0 { |
| <span class="kw">for </span>x <span class="kw">in </span><span class="number">0</span>..w0 { |
| <span class="kw">let </span>p = image.get_pixel(x, y); |
| destination.put_pixel(w0 - x - <span class="number">1</span>, y, p); |
| } |
| } |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="doccomment">/// Flip an image vertically and put the result into the destination [`ImageBuffer`]. |
| </span><span class="kw">pub fn </span>flip_vertical_in<I, Container>( |
| image: <span class="kw-2">&</span>I, |
| destination: <span class="kw-2">&mut </span>ImageBuffer<I::Pixel, Container> |
| ) -> <span class="kw">crate</span>::ImageResult<()> <span class="kw">where |
| </span>I: GenericImageView, |
| I::Pixel: <span class="lifetime">'static</span>, |
| Container: std::ops::DerefMut<Target = [<I::Pixel <span class="kw">as </span>Pixel>::Subpixel]> |
| { |
| <span class="kw">let </span>((w0, h0), (w1, h1)) = (image.dimensions(), destination.dimensions()); |
| <span class="kw">if </span>w0 != w1 || h0 != h1 { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(ImageError::Parameter(ParameterError::from_kind( |
| ParameterErrorKind::DimensionMismatch, |
| ))); |
| } |
| |
| <span class="kw">for </span>y <span class="kw">in </span><span class="number">0</span>..h0 { |
| <span class="kw">for </span>x <span class="kw">in </span><span class="number">0</span>..w0 { |
| <span class="kw">let </span>p = image.get_pixel(x, y); |
| destination.put_pixel(x, h0 - <span class="number">1 </span>- y, p); |
| } |
| } |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="doccomment">/// Rotate an image 180 degrees clockwise in place. |
| </span><span class="kw">pub fn </span>rotate180_in_place<I: GenericImage>(image: <span class="kw-2">&mut </span>I) { |
| <span class="kw">let </span>(width, height) = image.dimensions(); |
| |
| <span class="kw">for </span>y <span class="kw">in </span><span class="number">0</span>..height / <span class="number">2 </span>{ |
| <span class="kw">for </span>x <span class="kw">in </span><span class="number">0</span>..width { |
| <span class="kw">let </span>p = image.get_pixel(x, y); |
| |
| <span class="kw">let </span>x2 = width - x - <span class="number">1</span>; |
| <span class="kw">let </span>y2 = height - y - <span class="number">1</span>; |
| |
| <span class="kw">let </span>p2 = image.get_pixel(x2, y2); |
| image.put_pixel(x, y, p2); |
| image.put_pixel(x2, y2, p); |
| } |
| } |
| |
| <span class="kw">if </span>height % <span class="number">2 </span>!= <span class="number">0 </span>{ |
| <span class="kw">let </span>middle = height / <span class="number">2</span>; |
| |
| <span class="kw">for </span>x <span class="kw">in </span><span class="number">0</span>..width / <span class="number">2 </span>{ |
| <span class="kw">let </span>p = image.get_pixel(x, middle); |
| <span class="kw">let </span>x2 = width - x - <span class="number">1</span>; |
| |
| <span class="kw">let </span>p2 = image.get_pixel(x2, middle); |
| image.put_pixel(x, middle, p2); |
| image.put_pixel(x2, middle, p); |
| } |
| } |
| } |
| |
| <span class="doccomment">/// Flip an image horizontally in place. |
| </span><span class="kw">pub fn </span>flip_horizontal_in_place<I: GenericImage>(image: <span class="kw-2">&mut </span>I) { |
| <span class="kw">let </span>(width, height) = image.dimensions(); |
| |
| <span class="kw">for </span>y <span class="kw">in </span><span class="number">0</span>..height { |
| <span class="kw">for </span>x <span class="kw">in </span><span class="number">0</span>..width / <span class="number">2 </span>{ |
| <span class="kw">let </span>x2 = width - x - <span class="number">1</span>; |
| <span class="kw">let </span>p2 = image.get_pixel(x2, y); |
| <span class="kw">let </span>p = image.get_pixel(x, y); |
| image.put_pixel(x2, y, p); |
| image.put_pixel(x, y, p2); |
| } |
| } |
| } |
| |
| <span class="doccomment">/// Flip an image vertically in place. |
| </span><span class="kw">pub fn </span>flip_vertical_in_place<I: GenericImage>(image: <span class="kw-2">&mut </span>I) { |
| <span class="kw">let </span>(width, height) = image.dimensions(); |
| |
| <span class="kw">for </span>y <span class="kw">in </span><span class="number">0</span>..height / <span class="number">2 </span>{ |
| <span class="kw">for </span>x <span class="kw">in </span><span class="number">0</span>..width { |
| <span class="kw">let </span>y2 = height - y - <span class="number">1</span>; |
| <span class="kw">let </span>p2 = image.get_pixel(x, y2); |
| <span class="kw">let </span>p = image.get_pixel(x, y); |
| image.put_pixel(x, y2, p); |
| image.put_pixel(x, y, p2); |
| } |
| } |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>test { |
| <span class="kw">use super</span>::{ |
| flip_horizontal, flip_horizontal_in_place, flip_vertical, flip_vertical_in_place, |
| rotate180, rotate180_in_place, rotate270, rotate90, |
| }; |
| <span class="kw">use crate</span>::{GrayImage, ImageBuffer}; |
| <span class="kw">use </span><span class="kw">crate</span>::image::GenericImage; |
| <span class="kw">use </span><span class="kw">crate</span>::traits::Pixel; |
| |
| <span class="macro">macro_rules! </span>assert_pixels_eq { |
| (<span class="macro-nonterminal">$actual</span>:expr, <span class="macro-nonterminal">$expected</span>:expr) => {{ |
| <span class="kw">let </span>actual_dim = <span class="macro-nonterminal">$actual</span>.dimensions(); |
| <span class="kw">let </span>expected_dim = <span class="macro-nonterminal">$expected</span>.dimensions(); |
| |
| <span class="kw">if </span>actual_dim != expected_dim { |
| <span class="macro">panic!</span>( |
| <span class="string">"dimensions do not match. \ |
| actual: {:?}, expected: {:?}"</span>, |
| actual_dim, expected_dim |
| ) |
| } |
| |
| <span class="kw">let </span>diffs = pixel_diffs(<span class="macro-nonterminal">$actual</span>, <span class="macro-nonterminal">$expected</span>); |
| |
| <span class="kw">if </span>!diffs.is_empty() { |
| <span class="kw">let </span><span class="kw-2">mut </span>err = <span class="string">"pixels do not match. "</span>.to_string(); |
| |
| <span class="kw">let </span>diff_messages = diffs |
| .iter() |
| .take(<span class="number">5</span>) |
| .map(|d| <span class="macro">format!</span>(<span class="string">"\nactual: {:?}, expected {:?} "</span>, d.<span class="number">0</span>, d.<span class="number">1</span>)) |
| .collect::<Vec<<span class="kw">_</span>>>() |
| .join(<span class="string">""</span>); |
| |
| err.push_str(<span class="kw-2">&</span>diff_messages); |
| <span class="macro">panic!</span>(err) |
| } |
| }}; |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_rotate90() { |
| <span class="kw">let </span>image: GrayImage = |
| ImageBuffer::from_raw(<span class="number">3</span>, <span class="number">2</span>, <span class="macro">vec!</span>[<span class="number">00u8</span>, <span class="number">01u8</span>, <span class="number">02u8</span>, <span class="number">10u8</span>, <span class="number">11u8</span>, <span class="number">12u8</span>]).unwrap(); |
| |
| <span class="kw">let </span>expected: GrayImage = |
| ImageBuffer::from_raw(<span class="number">2</span>, <span class="number">3</span>, <span class="macro">vec!</span>[<span class="number">10u8</span>, <span class="number">00u8</span>, <span class="number">11u8</span>, <span class="number">01u8</span>, <span class="number">12u8</span>, <span class="number">02u8</span>]).unwrap(); |
| |
| <span class="macro">assert_pixels_eq!</span>(<span class="kw-2">&</span>rotate90(<span class="kw-2">&</span>image), <span class="kw-2">&</span>expected); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_rotate180() { |
| <span class="kw">let </span>image: GrayImage = |
| ImageBuffer::from_raw(<span class="number">3</span>, <span class="number">2</span>, <span class="macro">vec!</span>[<span class="number">00u8</span>, <span class="number">01u8</span>, <span class="number">02u8</span>, <span class="number">10u8</span>, <span class="number">11u8</span>, <span class="number">12u8</span>]).unwrap(); |
| |
| <span class="kw">let </span>expected: GrayImage = |
| ImageBuffer::from_raw(<span class="number">3</span>, <span class="number">2</span>, <span class="macro">vec!</span>[<span class="number">12u8</span>, <span class="number">11u8</span>, <span class="number">10u8</span>, <span class="number">02u8</span>, <span class="number">01u8</span>, <span class="number">00u8</span>]).unwrap(); |
| |
| <span class="macro">assert_pixels_eq!</span>(<span class="kw-2">&</span>rotate180(<span class="kw-2">&</span>image), <span class="kw-2">&</span>expected); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_rotate270() { |
| <span class="kw">let </span>image: GrayImage = |
| ImageBuffer::from_raw(<span class="number">3</span>, <span class="number">2</span>, <span class="macro">vec!</span>[<span class="number">00u8</span>, <span class="number">01u8</span>, <span class="number">02u8</span>, <span class="number">10u8</span>, <span class="number">11u8</span>, <span class="number">12u8</span>]).unwrap(); |
| |
| <span class="kw">let </span>expected: GrayImage = |
| ImageBuffer::from_raw(<span class="number">2</span>, <span class="number">3</span>, <span class="macro">vec!</span>[<span class="number">02u8</span>, <span class="number">12u8</span>, <span class="number">01u8</span>, <span class="number">11u8</span>, <span class="number">00u8</span>, <span class="number">10u8</span>]).unwrap(); |
| |
| <span class="macro">assert_pixels_eq!</span>(<span class="kw-2">&</span>rotate270(<span class="kw-2">&</span>image), <span class="kw-2">&</span>expected); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_rotate180_in_place() { |
| <span class="kw">let </span><span class="kw-2">mut </span>image: GrayImage = |
| ImageBuffer::from_raw(<span class="number">3</span>, <span class="number">2</span>, <span class="macro">vec!</span>[<span class="number">00u8</span>, <span class="number">01u8</span>, <span class="number">02u8</span>, <span class="number">10u8</span>, <span class="number">11u8</span>, <span class="number">12u8</span>]).unwrap(); |
| |
| <span class="kw">let </span>expected: GrayImage = |
| ImageBuffer::from_raw(<span class="number">3</span>, <span class="number">2</span>, <span class="macro">vec!</span>[<span class="number">12u8</span>, <span class="number">11u8</span>, <span class="number">10u8</span>, <span class="number">02u8</span>, <span class="number">01u8</span>, <span class="number">00u8</span>]).unwrap(); |
| |
| rotate180_in_place(<span class="kw-2">&mut </span>image); |
| |
| <span class="macro">assert_pixels_eq!</span>(<span class="kw-2">&</span>image, <span class="kw-2">&</span>expected); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_flip_horizontal() { |
| <span class="kw">let </span>image: GrayImage = |
| ImageBuffer::from_raw(<span class="number">3</span>, <span class="number">2</span>, <span class="macro">vec!</span>[<span class="number">00u8</span>, <span class="number">01u8</span>, <span class="number">02u8</span>, <span class="number">10u8</span>, <span class="number">11u8</span>, <span class="number">12u8</span>]).unwrap(); |
| |
| <span class="kw">let </span>expected: GrayImage = |
| ImageBuffer::from_raw(<span class="number">3</span>, <span class="number">2</span>, <span class="macro">vec!</span>[<span class="number">02u8</span>, <span class="number">01u8</span>, <span class="number">00u8</span>, <span class="number">12u8</span>, <span class="number">11u8</span>, <span class="number">10u8</span>]).unwrap(); |
| |
| <span class="macro">assert_pixels_eq!</span>(<span class="kw-2">&</span>flip_horizontal(<span class="kw-2">&</span>image), <span class="kw-2">&</span>expected); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_flip_vertical() { |
| <span class="kw">let </span>image: GrayImage = |
| ImageBuffer::from_raw(<span class="number">3</span>, <span class="number">2</span>, <span class="macro">vec!</span>[<span class="number">00u8</span>, <span class="number">01u8</span>, <span class="number">02u8</span>, <span class="number">10u8</span>, <span class="number">11u8</span>, <span class="number">12u8</span>]).unwrap(); |
| |
| <span class="kw">let </span>expected: GrayImage = |
| ImageBuffer::from_raw(<span class="number">3</span>, <span class="number">2</span>, <span class="macro">vec!</span>[<span class="number">10u8</span>, <span class="number">11u8</span>, <span class="number">12u8</span>, <span class="number">00u8</span>, <span class="number">01u8</span>, <span class="number">02u8</span>]).unwrap(); |
| |
| <span class="macro">assert_pixels_eq!</span>(<span class="kw-2">&</span>flip_vertical(<span class="kw-2">&</span>image), <span class="kw-2">&</span>expected); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_flip_horizontal_in_place() { |
| <span class="kw">let </span><span class="kw-2">mut </span>image: GrayImage = |
| ImageBuffer::from_raw(<span class="number">3</span>, <span class="number">2</span>, <span class="macro">vec!</span>[<span class="number">00u8</span>, <span class="number">01u8</span>, <span class="number">02u8</span>, <span class="number">10u8</span>, <span class="number">11u8</span>, <span class="number">12u8</span>]).unwrap(); |
| |
| <span class="kw">let </span>expected: GrayImage = |
| ImageBuffer::from_raw(<span class="number">3</span>, <span class="number">2</span>, <span class="macro">vec!</span>[<span class="number">02u8</span>, <span class="number">01u8</span>, <span class="number">00u8</span>, <span class="number">12u8</span>, <span class="number">11u8</span>, <span class="number">10u8</span>]).unwrap(); |
| |
| flip_horizontal_in_place(<span class="kw-2">&mut </span>image); |
| |
| <span class="macro">assert_pixels_eq!</span>(<span class="kw-2">&</span>image, <span class="kw-2">&</span>expected); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_flip_vertical_in_place() { |
| <span class="kw">let </span><span class="kw-2">mut </span>image: GrayImage = |
| ImageBuffer::from_raw(<span class="number">3</span>, <span class="number">2</span>, <span class="macro">vec!</span>[<span class="number">00u8</span>, <span class="number">01u8</span>, <span class="number">02u8</span>, <span class="number">10u8</span>, <span class="number">11u8</span>, <span class="number">12u8</span>]).unwrap(); |
| |
| <span class="kw">let </span>expected: GrayImage = |
| ImageBuffer::from_raw(<span class="number">3</span>, <span class="number">2</span>, <span class="macro">vec!</span>[<span class="number">10u8</span>, <span class="number">11u8</span>, <span class="number">12u8</span>, <span class="number">00u8</span>, <span class="number">01u8</span>, <span class="number">02u8</span>]).unwrap(); |
| |
| flip_vertical_in_place(<span class="kw-2">&mut </span>image); |
| |
| <span class="macro">assert_pixels_eq!</span>(<span class="kw-2">&</span>image, <span class="kw-2">&</span>expected); |
| } |
| |
| <span class="kw">fn </span>pixel_diffs<I, J, P>(left: <span class="kw-2">&</span>I, right: <span class="kw-2">&</span>J) -> Vec<((u32, u32, P), (u32, u32, P))> |
| <span class="kw">where |
| </span>I: GenericImage<Pixel = P>, |
| J: GenericImage<Pixel = P>, |
| P: Pixel + Eq, |
| { |
| left.pixels() |
| .zip(right.pixels()) |
| .filter(|<span class="kw-2">&</span>(p, q)| p != q) |
| .collect::<Vec<<span class="kw">_</span>>>() |
| } |
| } |
| </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> |
