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<!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="API documentation for the Rust `load_textures` fn in crate `widgetry`."><meta name="keywords" content="rust, rustlang, rust-lang, load_textures"><title>widgetry::backend_glow_native::load_textures - Rust</title><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css"><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script src="../../storage.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="shortcut icon" href="../../favicon.ico"><style type="text/css">#crate-search{background-image:url("../../down-arrow.svg");}</style></head><body class="rustdoc fn"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../../widgetry/index.html'><div class='logo-container'><img src='../../rust-logo.png' alt='logo'></div></a><div class="sidebar-elems"><p class='location'><a href='../index.html'>widgetry</a>::<wbr><a href='index.html'>backend_glow_native</a></p><script>window.sidebarCurrent = {name: 'load_textures', ty: 'fn', relpath: ''};</script><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../theme.js"></script><nav class="sub"><form class="search-form"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" disabled autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class='fqn'><span class='out-of-band'><span id='render-detail'><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class='inner'>−</span>]</a></span><a class='srclink' href='../../src/widgetry/backend_glow_native.rs.html#118-292' title='goto source code'>[src]</a></span><span class='in-band'>Function <a href='../index.html'>widgetry</a>::<wbr><a href='index.html'>backend_glow_native</a>::<wbr><a class="fn" href=''>load_textures</a></span></h1><pre class='rust fn'>fn load_textures(<br> gl: &Context, <br> filename: &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>, <br> sprite_length: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u32.html">u32</a><br>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><dyn <a class="trait" href="https://doc.rust-lang.org/nightly/std/error/trait.Error.html" title="trait std::error::Error">Error</a>>></pre><div class='docblock'><p>Uploads a sprite sheet of textures to the GPU so they can be used by FancyColor::Texture and
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friends to paint shapes.</p>
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<p><code>path</code> - image file which is a grid of images.
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<code>sprite_length</code> - the width and height of an individual cell in the image grid</p>
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<p>The image file can have any number of sprites, but they must all be the same size.</p>
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<p>Once uploaded, textures are addressed by their id, starting from 1, from left to right, top to
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bottom, like so:</p>
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<pre><code>┌─┬─┬─┐
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│1│2│3│
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├─┼─┼─┤
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│4│5│6│
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├─┼─┼─┤
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│7│8│9│
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└─┴─┴─┘</code></pre>
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<p>Texture(0) is reserved for a pure white (no-op) texture.</p>
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<p>Implementation is based on the the description of ArrayTextures from:
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https://www.khronos.org/opengl/wiki/Array_Texture.</p>
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