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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"><button type="button" id="help-button" title="help">?</button><a id="settings-menu" href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../wheel.svg"></a></div></form></nav></div><section id="main-content" class="content"><div class="example-wrap"><pre class="line-numbers"><span id="1">1</span> <span id="2">2</span> <span id="3">3</span> <span id="4">4</span> <span id="5">5</span> <span id="6">6</span> <span id="7">7</span> <span id="8">8</span> <span id="9">9</span> <span id="10">10</span> <span id="11">11</span> <span id="12">12</span> <span id="13">13</span> <span id="14">14</span> <span id="15">15</span> <span id="16">16</span> <span id="17">17</span> <span id="18">18</span> <span id="19">19</span> <span id="20">20</span> <span 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class="ident">std::fmt</span>; <span class="kw">use</span> <span class="ident">serde</span>::{<span class="ident">Deserialize</span>, <span class="ident">Serialize</span>}; <span class="kw">use</span> <span class="ident">geom</span>::{<span class="ident">Line</span>, <span class="ident">Pt2D</span>}; <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Clone</span>, <span class="ident">Copy</span>, <span class="ident">PartialEq</span>, <span class="ident">Serialize</span>, <span class="ident">Deserialize</span>)]</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Color</span> { <span class="kw">pub</span> <span class="ident">r</span>: <span class="ident">f32</span>, <span class="kw">pub</span> <span class="ident">g</span>: <span class="ident">f32</span>, <span class="kw">pub</span> <span class="ident">b</span>: <span class="ident">f32</span>, <span class="kw">pub</span> <span class="ident">a</span>: <span class="ident">f32</span>, } <span class="kw">impl</span> <span class="ident">fmt::Display</span> <span class="kw">for</span> <span class="ident">Color</span> { <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&mut</span> <span class="ident">fmt::Formatter</span>) -> <span class="ident">fmt::Result</span> { <span class="macro">write!</span>( <span class="ident">f</span>, <span class="string">"Color(r={}, g={}, b={}, a={})"</span>, <span class="self">self</span>.<span class="ident">r</span>, <span class="self">self</span>.<span class="ident">g</span>, <span class="self">self</span>.<span class="ident">b</span>, <span class="self">self</span>.<span class="ident">a</span> ) } } <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Clone</span>, <span class="ident">PartialEq</span>)]</span> <span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">Fill</span> { <span class="ident">Color</span>(<span class="ident">Color</span>), <span class="ident">LinearGradient</span>(<span class="ident">LinearGradient</span>), <span class="doccomment">/// Once uploaded, textures are addressed by their id, starting from 1, from left to right, top</span> <span class="doccomment">/// to bottom, like so:</span> <span class="doccomment">///</span> <span class="doccomment">/// ┌─┬─┬─┐</span> <span class="doccomment">/// │1│2│3│</span> <span class="doccomment">/// ├─┼─┼─┤</span> <span class="doccomment">/// │4│5│6│</span> <span class="doccomment">/// ├─┼─┼─┤</span> <span class="doccomment">/// │7│8│9│</span> <span class="doccomment">/// └─┴─┴─┘</span> <span class="doccomment">///</span> <span class="doccomment">/// Texture(0) is reserved for a pure white (no-op) texture.</span> <span class="ident">Texture</span>(<span class="ident">Texture</span>), <span class="doccomment">/// The `color` parameter is multiplied by any color baked into the texture, so typically this</span> <span class="doccomment">/// only makes sense for grayscale textures.</span> <span class="ident">ColoredTexture</span>(<span class="ident">Color</span>, <span class="ident">Texture</span>), } <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Copy</span>, <span class="ident">Clone</span>, <span class="ident">PartialEq</span>)]</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Texture</span>(<span class="ident">u32</span>); <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">dead_code</span>)]</span> <span class="kw">impl</span> <span class="ident">Texture</span> { <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">NOOP</span>: <span class="ident">Texture</span> <span class="op">=</span> <span class="ident">Texture</span>(<span class="number">0</span>); <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">GRASS</span>: <span class="ident">Texture</span> <span class="op">=</span> <span class="ident">Texture</span>(<span class="number">1</span>); <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">STILL_WATER</span>: <span class="ident">Texture</span> <span class="op">=</span> <span class="ident">Texture</span>(<span class="number">2</span>); <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">RUNNING_WATER</span>: <span class="ident">Texture</span> <span class="op">=</span> <span class="ident">Texture</span>(<span class="number">3</span>); <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">CONCRETE</span>: <span class="ident">Texture</span> <span class="op">=</span> <span class="ident">Texture</span>(<span class="number">4</span>); <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">SAND</span>: <span class="ident">Texture</span> <span class="op">=</span> <span class="ident">Texture</span>(<span class="number">5</span>); <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">DIRT</span>: <span class="ident">Texture</span> <span class="op">=</span> <span class="ident">Texture</span>(<span class="number">6</span>); <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">SNOW</span>: <span class="ident">Texture</span> <span class="op">=</span> <span class="ident">Texture</span>(<span class="number">7</span>); <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">TREE</span>: <span class="ident">Texture</span> <span class="op">=</span> <span class="ident">Texture</span>(<span class="number">15</span>); <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">PINE_TREE</span>: <span class="ident">Texture</span> <span class="op">=</span> <span class="ident">Texture</span>(<span class="number">16</span>); <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">CACTUS</span>: <span class="ident">Texture</span> <span class="op">=</span> <span class="ident">Texture</span>(<span class="number">17</span>); <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">SHRUB</span>: <span class="ident">Texture</span> <span class="op">=</span> <span class="ident">Texture</span>(<span class="number">18</span>); <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">CROSS_HATCH</span>: <span class="ident">Texture</span> <span class="op">=</span> <span class="ident">Texture</span>(<span class="number">19</span>); <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">SNOW_PERSON</span>: <span class="ident">Texture</span> <span class="op">=</span> <span class="ident">Texture</span>(<span class="number">29</span>); } <span class="kw">impl</span> <span class="ident">Color</span> { <span class="comment">// TODO Won't this confuse the shader?</span> <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">CLEAR</span>: <span class="ident">Color</span> <span class="op">=</span> <span class="ident">Color::rgba_f</span>(<span class="number">1.0</span>, <span class="number">0.0</span>, <span class="number">0.0</span>, <span class="number">0.0</span>); <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">BLACK</span>: <span class="ident">Color</span> <span class="op">=</span> <span class="ident">Color::rgb_f</span>(<span class="number">0.0</span>, <span class="number">0.0</span>, <span class="number">0.0</span>); <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">WHITE</span>: <span class="ident">Color</span> <span class="op">=</span> <span class="ident">Color::rgb_f</span>(<span class="number">1.0</span>, <span class="number">1.0</span>, <span class="number">1.0</span>); <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">RED</span>: <span class="ident">Color</span> <span class="op">=</span> <span class="ident">Color::rgb_f</span>(<span class="number">1.0</span>, <span class="number">0.0</span>, <span class="number">0.0</span>); <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">GREEN</span>: <span class="ident">Color</span> <span class="op">=</span> <span class="ident">Color::rgb_f</span>(<span class="number">0.0</span>, <span class="number">1.0</span>, <span class="number">0.0</span>); <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">BLUE</span>: <span class="ident">Color</span> <span class="op">=</span> <span class="ident">Color::rgb_f</span>(<span class="number">0.0</span>, <span class="number">0.0</span>, <span class="number">1.0</span>); <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">CYAN</span>: <span class="ident">Color</span> <span class="op">=</span> <span class="ident">Color::rgb_f</span>(<span class="number">0.0</span>, <span class="number">1.0</span>, <span class="number">1.0</span>); <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">YELLOW</span>: <span class="ident">Color</span> <span class="op">=</span> <span class="ident">Color::rgb_f</span>(<span class="number">1.0</span>, <span class="number">1.0</span>, <span class="number">0.0</span>); <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">PURPLE</span>: <span class="ident">Color</span> <span class="op">=</span> <span class="ident">Color::rgb_f</span>(<span class="number">0.5</span>, <span class="number">0.0</span>, <span class="number">0.5</span>); <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">PINK</span>: <span class="ident">Color</span> <span class="op">=</span> <span class="ident">Color::rgb_f</span>(<span class="number">1.0</span>, <span class="number">0.41</span>, <span class="number">0.71</span>); <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">ORANGE</span>: <span class="ident">Color</span> <span class="op">=</span> <span class="ident">Color::rgb_f</span>(<span class="number">1.0</span>, <span class="number">0.55</span>, <span class="number">0.0</span>); <span class="comment">// TODO should assert stuff about the inputs</span> <span class="comment">// TODO Once f32 can be used in const fn, make these const fn too and clean up call sites</span> <span class="comment">// dividing by 255.0. https://github.com/rust-lang/rust/issues/57241</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">rgb</span>(<span class="ident">r</span>: <span class="ident">usize</span>, <span class="ident">g</span>: <span class="ident">usize</span>, <span class="ident">b</span>: <span class="ident">usize</span>) -> <span class="ident">Color</span> { <span class="ident">Color::rgba</span>(<span class="ident">r</span>, <span class="ident">g</span>, <span class="ident">b</span>, <span class="number">1.0</span>) } <span class="kw">pub</span> <span class="kw">const</span> <span class="kw">fn</span> <span class="ident">rgb_f</span>(<span class="ident">r</span>: <span class="ident">f32</span>, <span class="ident">g</span>: <span class="ident">f32</span>, <span class="ident">b</span>: <span class="ident">f32</span>) -> <span class="ident">Color</span> { <span class="ident">Color</span> { <span class="ident">r</span>, <span class="ident">g</span>, <span class="ident">b</span>, <span class="ident">a</span>: <span class="number">1.0</span> } } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">rgba</span>(<span class="ident">r</span>: <span class="ident">usize</span>, <span class="ident">g</span>: <span class="ident">usize</span>, <span class="ident">b</span>: <span class="ident">usize</span>, <span class="ident">a</span>: <span class="ident">f32</span>) -> <span class="ident">Color</span> { <span class="ident">Color</span> { <span class="ident">r</span>: (<span class="ident">r</span> <span class="kw">as</span> <span class="ident">f32</span>) <span class="op">/</span> <span class="number">255.0</span>, <span class="ident">g</span>: (<span class="ident">g</span> <span class="kw">as</span> <span class="ident">f32</span>) <span class="op">/</span> <span class="number">255.0</span>, <span class="ident">b</span>: (<span class="ident">b</span> <span class="kw">as</span> <span class="ident">f32</span>) <span class="op">/</span> <span class="number">255.0</span>, <span class="ident">a</span>, } } <span class="kw">pub</span> <span class="kw">const</span> <span class="kw">fn</span> <span class="ident">rgba_f</span>(<span class="ident">r</span>: <span class="ident">f32</span>, <span class="ident">g</span>: <span class="ident">f32</span>, <span class="ident">b</span>: <span class="ident">f32</span>, <span class="ident">a</span>: <span class="ident">f32</span>) -> <span class="ident">Color</span> { <span class="ident">Color</span> { <span class="ident">r</span>, <span class="ident">g</span>, <span class="ident">b</span>, <span class="ident">a</span> } } <span class="kw">pub</span> <span class="kw">const</span> <span class="kw">fn</span> <span class="ident">grey</span>(<span class="ident">f</span>: <span class="ident">f32</span>) -> <span class="ident">Color</span> { <span class="ident">Color::rgb_f</span>(<span class="ident">f</span>, <span class="ident">f</span>, <span class="ident">f</span>) } <span class="doccomment">/// Note this is incorrect for `Color::CLEAR`. Can't fix in a const fn.</span> <span class="kw">pub</span> <span class="kw">const</span> <span class="kw">fn</span> <span class="ident">alpha</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">a</span>: <span class="ident">f32</span>) -> <span class="ident">Color</span> { <span class="ident">Color::rgba_f</span>(<span class="self">self</span>.<span class="ident">r</span>, <span class="self">self</span>.<span class="ident">g</span>, <span class="self">self</span>.<span class="ident">b</span>, <span class="ident">a</span>) } <span class="doccomment">/// Multiply the color's current alpha by the `factor`, returning a new color.</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">multiply_alpha</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">factor</span>: <span class="ident">f32</span>) -> <span class="ident">Color</span> { <span class="ident">Color::rgba_f</span>(<span class="self">self</span>.<span class="ident">r</span>, <span class="self">self</span>.<span class="ident">g</span>, <span class="self">self</span>.<span class="ident">b</span>, <span class="self">self</span>.<span class="ident">a</span> <span class="op">*</span> <span class="ident">factor</span>) } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">hex</span>(<span class="ident">raw</span>: <span class="kw-2">&</span><span class="ident">str</span>) -> <span class="ident">Color</span> { <span class="comment">// Skip the leading '#'</span> <span class="kw">let</span> <span class="ident">r</span> <span class="op">=</span> <span class="ident">usize::from_str_radix</span>(<span class="kw-2">&</span><span class="ident">raw</span>[<span class="number">1</span>..<span class="number">3</span>], <span class="number">16</span>).<span class="ident">unwrap</span>(); <span class="kw">let</span> <span class="ident">g</span> <span class="op">=</span> <span class="ident">usize::from_str_radix</span>(<span class="kw-2">&</span><span class="ident">raw</span>[<span class="number">3</span>..<span class="number">5</span>], <span class="number">16</span>).<span class="ident">unwrap</span>(); <span class="kw">let</span> <span class="ident">b</span> <span class="op">=</span> <span class="ident">usize::from_str_radix</span>(<span class="kw-2">&</span><span class="ident">raw</span>[<span class="number">5</span>..<span class="number">7</span>], <span class="number">16</span>).<span class="ident">unwrap</span>(); <span class="ident">Color::rgb</span>(<span class="ident">r</span>, <span class="ident">g</span>, <span class="ident">b</span>) } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">as_hex</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">String</span> { <span class="macro">format!</span>( <span class="string">"#{:02X}{:02X}{:02X}"</span>, (<span class="self">self</span>.<span class="ident">r</span> <span class="op">*</span> <span class="number">255.0</span>) <span class="kw">as</span> <span class="ident">usize</span>, (<span class="self">self</span>.<span class="ident">g</span> <span class="op">*</span> <span class="number">255.0</span>) <span class="kw">as</span> <span class="ident">usize</span>, (<span class="self">self</span>.<span class="ident">b</span> <span class="op">*</span> <span class="number">255.0</span>) <span class="kw">as</span> <span class="ident">usize</span> ) } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">lerp</span>(<span class="self">self</span>, <span class="ident">other</span>: <span class="ident">Color</span>, <span class="ident">pct</span>: <span class="ident">f64</span>) -> <span class="ident">Color</span> { <span class="ident">Color::rgba_f</span>( <span class="ident">lerp</span>(<span class="ident">pct</span>, (<span class="self">self</span>.<span class="ident">r</span>, <span class="ident">other</span>.<span class="ident">r</span>)), <span class="ident">lerp</span>(<span class="ident">pct</span>, (<span class="self">self</span>.<span class="ident">g</span>, <span class="ident">other</span>.<span class="ident">g</span>)), <span class="ident">lerp</span>(<span class="ident">pct</span>, (<span class="self">self</span>.<span class="ident">b</span>, <span class="ident">other</span>.<span class="ident">b</span>)), <span class="ident">lerp</span>(<span class="ident">pct</span>, (<span class="self">self</span>.<span class="ident">a</span>, <span class="ident">other</span>.<span class="ident">a</span>)), ) } <span class="comment">// Mix the color with black</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">shade</span>(<span class="self">self</span>, <span class="ident">black_ratio</span>: <span class="ident">f64</span>) -> <span class="ident">Color</span> { <span class="self">self</span>.<span class="ident">lerp</span>(<span class="ident">Color::BLACK</span>, <span class="ident">black_ratio</span>) } <span class="comment">// Mix the color with white</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">tint</span>(<span class="self">self</span>, <span class="ident">white_ratio</span>: <span class="ident">f64</span>) -> <span class="ident">Color</span> { <span class="self">self</span>.<span class="ident">lerp</span>(<span class="ident">Color::WHITE</span>, <span class="ident">white_ratio</span>) } <span class="comment">// A theme agnostic way to get a more/less intense color without affecting alpha.</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">dull</span>(<span class="self">self</span>, <span class="ident">ratio</span>: <span class="ident">f64</span>) -> <span class="ident">Color</span> { <span class="self">self</span>.<span class="ident">lerp</span>(<span class="ident">Color::grey</span>(<span class="number">0.5</span>), <span class="ident">ratio</span>) } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">invert</span>(<span class="self">self</span>) -> <span class="ident">Color</span> { <span class="ident">Color::rgba_f</span>(<span class="number">1.0</span> <span class="op">-</span> <span class="self">self</span>.<span class="ident">r</span>, <span class="number">1.0</span> <span class="op">-</span> <span class="self">self</span>.<span class="ident">g</span>, <span class="number">1.0</span> <span class="op">-</span> <span class="self">self</span>.<span class="ident">b</span>, <span class="self">self</span>.<span class="ident">a</span>) } } <span class="comment">// https://developer.mozilla.org/en-US/docs/Web/CSS/linear-gradient is the best reference I've</span> <span class="comment">// found, even though it's technically for CSS, not SVG. Ah, and</span> <span class="comment">// https://www.w3.org/TR/SVG11/pservers.html</span> <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Clone</span>, <span class="ident">PartialEq</span>)]</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">LinearGradient</span> { <span class="kw">pub</span> <span class="ident">line</span>: <span class="ident">Line</span>, <span class="kw">pub</span> <span class="ident">stops</span>: <span class="ident">Vec</span><span class="op"><</span>(<span class="ident">f64</span>, <span class="ident">Color</span>)<span class="op">></span>, } <span class="kw">impl</span> <span class="ident">LinearGradient</span> { <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn</span> <span class="ident">new_fill</span>(<span class="ident">lg</span>: <span class="kw-2">&</span><span class="ident">usvg::LinearGradient</span>) -> <span class="ident">Fill</span> { <span class="kw">let</span> <span class="ident">line</span> <span class="op">=</span> <span class="ident">Line::must_new</span>(<span class="ident">Pt2D::new</span>(<span class="ident">lg</span>.<span class="ident">x1</span>, <span class="ident">lg</span>.<span class="ident">y1</span>), <span class="ident">Pt2D::new</span>(<span class="ident">lg</span>.<span class="ident">x2</span>, <span class="ident">lg</span>.<span class="ident">y2</span>)); <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">stops</span> <span class="op">=</span> <span class="ident">Vec::new</span>(); <span class="kw">for</span> <span class="ident">stop</span> <span class="kw">in</span> <span class="kw-2">&</span><span class="ident">lg</span>.<span class="ident">stops</span> { <span class="kw">let</span> <span class="ident">color</span> <span class="op">=</span> <span class="ident">Color::rgba</span>( <span class="ident">stop</span>.<span class="ident">color</span>.<span class="ident">red</span> <span class="kw">as</span> <span class="ident">usize</span>, <span class="ident">stop</span>.<span class="ident">color</span>.<span class="ident">green</span> <span class="kw">as</span> <span class="ident">usize</span>, <span class="ident">stop</span>.<span class="ident">color</span>.<span class="ident">blue</span> <span class="kw">as</span> <span class="ident">usize</span>, <span class="ident">stop</span>.<span class="ident">opacity</span>.<span class="ident">value</span>() <span class="kw">as</span> <span class="ident">f32</span>, ); <span class="ident">stops</span>.<span class="ident">push</span>((<span class="ident">stop</span>.<span class="ident">offset</span>.<span class="ident">value</span>(), <span class="ident">color</span>)); } <span class="ident">Fill::LinearGradient</span>(<span class="ident">LinearGradient</span> { <span class="ident">line</span>, <span class="ident">stops</span> }) } <span class="kw">fn</span> <span class="ident">interp</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">pt</span>: <span class="ident">Pt2D</span>) -> <span class="ident">Color</span> { <span class="kw">let</span> <span class="ident">pct</span> <span class="op">=</span> <span class="self">self</span> .<span class="ident">line</span> .<span class="ident">percent_along_of_point</span>(<span class="self">self</span>.<span class="ident">line</span>.<span class="ident">to_polyline</span>().<span class="ident">project_pt</span>(<span class="ident">pt</span>)) .<span class="ident">unwrap</span>(); <span class="kw">if</span> <span class="ident">pct</span> <span class="op"><</span> <span class="self">self</span>.<span class="ident">stops</span>[<span class="number">0</span>].<span class="number">0</span> { <span class="kw">return</span> <span class="self">self</span>.<span class="ident">stops</span>[<span class="number">0</span>].<span class="number">1</span>; } <span class="kw">if</span> <span class="ident">pct</span> <span class="op">></span> <span class="self">self</span>.<span class="ident">stops</span>.<span class="ident">last</span>().<span class="ident">unwrap</span>().<span class="number">0</span> { <span class="kw">return</span> <span class="self">self</span>.<span class="ident">stops</span>.<span class="ident">last</span>().<span class="ident">unwrap</span>().<span class="number">1</span>; } <span class="comment">// In between two</span> <span class="kw">for</span> ((<span class="ident">pct1</span>, <span class="ident">c1</span>), (<span class="ident">pct2</span>, <span class="ident">c2</span>)) <span class="kw">in</span> <span class="self">self</span>.<span class="ident">stops</span>.<span class="ident">iter</span>().<span class="ident">zip</span>(<span class="self">self</span>.<span class="ident">stops</span>.<span class="ident">iter</span>().<span class="ident">skip</span>(<span class="number">1</span>)) { <span class="kw">if</span> <span class="ident">pct</span> <span class="op">></span><span class="op">=</span> <span class="kw-2">*</span><span class="ident">pct1</span> <span class="op">&&</span> <span class="ident">pct</span> <span class="op"><</span><span class="op">=</span> <span class="kw-2">*</span><span class="ident">pct2</span> { <span class="kw">return</span> <span class="ident">c1</span>.<span class="ident">lerp</span>(<span class="kw-2">*</span><span class="ident">c2</span>, <span class="ident">to_pct</span>(<span class="ident">pct</span>, (<span class="kw-2">*</span><span class="ident">pct1</span>, <span class="kw-2">*</span><span class="ident">pct2</span>))); } } <span class="macro">unreachable!</span>() } } <span class="kw">fn</span> <span class="ident">to_pct</span>(<span class="ident">value</span>: <span class="ident">f64</span>, (<span class="ident">low</span>, <span class="ident">high</span>): (<span class="ident">f64</span>, <span class="ident">f64</span>)) -> <span class="ident">f64</span> { <span class="macro">assert!</span>(<span class="ident">low</span> <span class="op"><</span><span class="op">=</span> <span class="ident">high</span>); <span class="macro">assert!</span>(<span class="ident">value</span> <span class="op">></span><span class="op">=</span> <span class="ident">low</span>); <span class="macro">assert!</span>(<span class="ident">value</span> <span class="op"><</span><span class="op">=</span> <span class="ident">high</span>); (<span class="ident">value</span> <span class="op">-</span> <span class="ident">low</span>) <span class="op">/</span> (<span class="ident">high</span> <span class="op">-</span> <span class="ident">low</span>) } <span class="kw">fn</span> <span class="ident">lerp</span>(<span class="ident">pct</span>: <span class="ident">f64</span>, (<span class="ident">x1</span>, <span class="ident">x2</span>): (<span class="ident">f32</span>, <span class="ident">f32</span>)) -> <span class="ident">f32</span> { <span class="ident">x1</span> <span class="op">+</span> (<span class="ident">pct</span> <span class="kw">as</span> <span class="ident">f32</span>) <span class="op">*</span> (<span class="ident">x2</span> <span class="op">-</span> <span class="ident">x1</span>) } <span class="kw">impl</span> <span class="ident">Fill</span> { <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn</span> <span class="ident">shader_style</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">pt</span>: <span class="ident">Pt2D</span>) -> [<span class="ident">f32</span>; <span class="number">5</span>] { <span class="kw">match</span> <span class="self">self</span> { <span class="ident">Fill::Color</span>(<span class="ident">c</span>) => [<span class="ident">c</span>.<span class="ident">r</span>, <span class="ident">c</span>.<span class="ident">g</span>, <span class="ident">c</span>.<span class="ident">b</span>, <span class="ident">c</span>.<span class="ident">a</span>, <span class="number">0.0</span>], <span class="ident">Fill::LinearGradient</span>(<span class="kw-2">ref</span> <span class="ident">lg</span>) => { <span class="kw">let</span> <span class="ident">c</span> <span class="op">=</span> <span class="ident">lg</span>.<span class="ident">interp</span>(<span class="ident">pt</span>); [<span class="ident">c</span>.<span class="ident">r</span>, <span class="ident">c</span>.<span class="ident">g</span>, <span class="ident">c</span>.<span class="ident">b</span>, <span class="ident">c</span>.<span class="ident">a</span>, <span class="number">0.0</span>] } <span class="ident">Fill::Texture</span>(<span class="ident">texture</span>) => [<span class="number">1.0</span>, <span class="number">1.0</span>, <span class="number">1.0</span>, <span class="number">1.0</span>, <span class="ident">texture</span>.<span class="number">0</span> <span class="kw">as</span> <span class="ident">f32</span>], <span class="ident">Fill::ColoredTexture</span>(<span class="ident">color</span>, <span class="ident">texture</span>) => { [<span class="ident">color</span>.<span class="ident">r</span>, <span class="ident">color</span>.<span class="ident">g</span>, <span class="ident">color</span>.<span class="ident">b</span>, <span class="ident">color</span>.<span class="ident">a</span>, <span class="ident">texture</span>.<span class="number">0</span> <span class="kw">as</span> <span class="ident">f32</span>] } } } } <span class="kw">impl</span> <span class="ident">std::convert::From</span><span class="op"><</span><span class="ident">Color</span><span class="op">></span> <span class="kw">for</span> <span class="ident">Fill</span> { <span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">color</span>: <span class="ident">Color</span>) -> <span class="ident">Fill</span> { <span class="ident">Fill::Color</span>(<span class="ident">color</span>) } } <span class="kw">impl</span> <span class="ident">std::convert::From</span><span class="op"><</span><span class="ident">Texture</span><span class="op">></span> <span class="kw">for</span> <span class="ident">Fill</span> { <span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">texture</span>: <span class="ident">Texture</span>) -> <span class="ident">Fill</span> { <span class="ident">Fill::Texture</span>(<span class="ident">texture</span>) } } </code></pre></div> </section><section id="search" class="content hidden"></section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="widgetry" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.61.0 (fe5b13d68 2022-05-18)" ></div> </body></html>