| <!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/color.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>color.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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| <span id="1076">1076</span> |
| <span id="1077">1077</span> |
| <span id="1078">1078</span> |
| <span id="1079">1079</span> |
| <span id="1080">1080</span> |
| <span id="1081">1081</span> |
| <span id="1082">1082</span> |
| <span id="1083">1083</span> |
| <span id="1084">1084</span> |
| <span id="1085">1085</span> |
| <span id="1086">1086</span> |
| <span id="1087">1087</span> |
| <span id="1088">1088</span> |
| <span id="1089">1089</span> |
| <span id="1090">1090</span> |
| <span id="1091">1091</span> |
| <span id="1092">1092</span> |
| <span id="1093">1093</span> |
| <span id="1094">1094</span> |
| <span id="1095">1095</span> |
| <span id="1096">1096</span> |
| <span id="1097">1097</span> |
| <span id="1098">1098</span> |
| <span id="1099">1099</span> |
| <span id="1100">1100</span> |
| <span id="1101">1101</span> |
| <span id="1102">1102</span> |
| <span id="1103">1103</span> |
| <span id="1104">1104</span> |
| <span id="1105">1105</span> |
| <span id="1106">1106</span> |
| <span id="1107">1107</span> |
| <span id="1108">1108</span> |
| <span id="1109">1109</span> |
| <span id="1110">1110</span> |
| <span id="1111">1111</span> |
| <span id="1112">1112</span> |
| <span id="1113">1113</span> |
| <span id="1114">1114</span> |
| <span id="1115">1115</span> |
| <span id="1116">1116</span> |
| <span id="1117">1117</span> |
| <span id="1118">1118</span> |
| <span id="1119">1119</span> |
| <span id="1120">1120</span> |
| <span id="1121">1121</span> |
| <span id="1122">1122</span> |
| <span id="1123">1123</span> |
| <span id="1124">1124</span> |
| <span id="1125">1125</span> |
| <span id="1126">1126</span> |
| <span id="1127">1127</span> |
| <span id="1128">1128</span> |
| <span id="1129">1129</span> |
| <span id="1130">1130</span> |
| <span id="1131">1131</span> |
| <span id="1132">1132</span> |
| <span id="1133">1133</span> |
| <span id="1134">1134</span> |
| <span id="1135">1135</span> |
| <span id="1136">1136</span> |
| <span id="1137">1137</span> |
| <span id="1138">1138</span> |
| <span id="1139">1139</span> |
| <span id="1140">1140</span> |
| <span id="1141">1141</span> |
| <span id="1142">1142</span> |
| <span id="1143">1143</span> |
| <span id="1144">1144</span> |
| <span id="1145">1145</span> |
| <span id="1146">1146</span> |
| <span id="1147">1147</span> |
| <span id="1148">1148</span> |
| <span id="1149">1149</span> |
| <span id="1150">1150</span> |
| <span id="1151">1151</span> |
| <span id="1152">1152</span> |
| <span id="1153">1153</span> |
| <span id="1154">1154</span> |
| <span id="1155">1155</span> |
| <span id="1156">1156</span> |
| <span id="1157">1157</span> |
| <span id="1158">1158</span> |
| <span id="1159">1159</span> |
| <span id="1160">1160</span> |
| <span id="1161">1161</span> |
| <span id="1162">1162</span> |
| <span id="1163">1163</span> |
| <span id="1164">1164</span> |
| <span id="1165">1165</span> |
| <span id="1166">1166</span> |
| <span id="1167">1167</span> |
| <span id="1168">1168</span> |
| <span id="1169">1169</span> |
| <span id="1170">1170</span> |
| <span id="1171">1171</span> |
| <span id="1172">1172</span> |
| <span id="1173">1173</span> |
| <span id="1174">1174</span> |
| <span id="1175">1175</span> |
| <span id="1176">1176</span> |
| <span id="1177">1177</span> |
| <span id="1178">1178</span> |
| <span id="1179">1179</span> |
| <span id="1180">1180</span> |
| <span id="1181">1181</span> |
| <span id="1182">1182</span> |
| <span id="1183">1183</span> |
| <span id="1184">1184</span> |
| <span id="1185">1185</span> |
| <span id="1186">1186</span> |
| <span id="1187">1187</span> |
| <span id="1188">1188</span> |
| <span id="1189">1189</span> |
| <span id="1190">1190</span> |
| <span id="1191">1191</span> |
| <span id="1192">1192</span> |
| <span id="1193">1193</span> |
| <span id="1194">1194</span> |
| <span id="1195">1195</span> |
| <span id="1196">1196</span> |
| <span id="1197">1197</span> |
| <span id="1198">1198</span> |
| <span id="1199">1199</span> |
| <span id="1200">1200</span> |
| <span id="1201">1201</span> |
| <span id="1202">1202</span> |
| <span id="1203">1203</span> |
| <span id="1204">1204</span> |
| <span id="1205">1205</span> |
| <span id="1206">1206</span> |
| <span id="1207">1207</span> |
| <span id="1208">1208</span> |
| <span id="1209">1209</span> |
| <span id="1210">1210</span> |
| <span id="1211">1211</span> |
| <span id="1212">1212</span> |
| <span id="1213">1213</span> |
| <span id="1214">1214</span> |
| <span id="1215">1215</span> |
| <span id="1216">1216</span> |
| <span id="1217">1217</span> |
| <span id="1218">1218</span> |
| <span id="1219">1219</span> |
| <span id="1220">1220</span> |
| <span id="1221">1221</span> |
| <span id="1222">1222</span> |
| <span id="1223">1223</span> |
| <span id="1224">1224</span> |
| <span id="1225">1225</span> |
| <span id="1226">1226</span> |
| <span id="1227">1227</span> |
| <span id="1228">1228</span> |
| <span id="1229">1229</span> |
| <span id="1230">1230</span> |
| <span id="1231">1231</span> |
| <span id="1232">1232</span> |
| <span id="1233">1233</span> |
| <span id="1234">1234</span> |
| <span id="1235">1235</span> |
| <span id="1236">1236</span> |
| <span id="1237">1237</span> |
| <span id="1238">1238</span> |
| <span id="1239">1239</span> |
| <span id="1240">1240</span> |
| <span id="1241">1241</span> |
| <span id="1242">1242</span> |
| <span id="1243">1243</span> |
| <span id="1244">1244</span> |
| <span id="1245">1245</span> |
| <span id="1246">1246</span> |
| <span id="1247">1247</span> |
| <span id="1248">1248</span> |
| <span id="1249">1249</span> |
| <span id="1250">1250</span> |
| <span id="1251">1251</span> |
| <span id="1252">1252</span> |
| <span id="1253">1253</span> |
| <span id="1254">1254</span> |
| <span id="1255">1255</span> |
| <span id="1256">1256</span> |
| <span id="1257">1257</span> |
| <span id="1258">1258</span> |
| <span id="1259">1259</span> |
| <span id="1260">1260</span> |
| <span id="1261">1261</span> |
| <span id="1262">1262</span> |
| <span id="1263">1263</span> |
| <span id="1264">1264</span> |
| <span id="1265">1265</span> |
| <span id="1266">1266</span> |
| <span id="1267">1267</span> |
| <span id="1268">1268</span> |
| <span id="1269">1269</span> |
| <span id="1270">1270</span> |
| <span id="1271">1271</span> |
| <span id="1272">1272</span> |
| <span id="1273">1273</span> |
| <span id="1274">1274</span> |
| <span id="1275">1275</span> |
| <span id="1276">1276</span> |
| <span id="1277">1277</span> |
| <span id="1278">1278</span> |
| <span id="1279">1279</span> |
| <span id="1280">1280</span> |
| <span id="1281">1281</span> |
| <span id="1282">1282</span> |
| <span id="1283">1283</span> |
| <span id="1284">1284</span> |
| <span id="1285">1285</span> |
| <span id="1286">1286</span> |
| <span id="1287">1287</span> |
| <span id="1288">1288</span> |
| <span id="1289">1289</span> |
| <span id="1290">1290</span> |
| <span id="1291">1291</span> |
| <span id="1292">1292</span> |
| <span id="1293">1293</span> |
| <span id="1294">1294</span> |
| <span id="1295">1295</span> |
| <span id="1296">1296</span> |
| <span id="1297">1297</span> |
| <span id="1298">1298</span> |
| <span id="1299">1299</span> |
| <span id="1300">1300</span> |
| <span id="1301">1301</span> |
| <span id="1302">1302</span> |
| <span id="1303">1303</span> |
| <span id="1304">1304</span> |
| <span id="1305">1305</span> |
| <span id="1306">1306</span> |
| <span id="1307">1307</span> |
| <span id="1308">1308</span> |
| <span id="1309">1309</span> |
| <span id="1310">1310</span> |
| <span id="1311">1311</span> |
| <span id="1312">1312</span> |
| <span id="1313">1313</span> |
| <span id="1314">1314</span> |
| <span id="1315">1315</span> |
| <span id="1316">1316</span> |
| <span id="1317">1317</span> |
| <span id="1318">1318</span> |
| <span id="1319">1319</span> |
| <span id="1320">1320</span> |
| <span id="1321">1321</span> |
| <span id="1322">1322</span> |
| <span id="1323">1323</span> |
| <span id="1324">1324</span> |
| <span id="1325">1325</span> |
| <span id="1326">1326</span> |
| <span id="1327">1327</span> |
| <span id="1328">1328</span> |
| <span id="1329">1329</span> |
| <span id="1330">1330</span> |
| <span id="1331">1331</span> |
| <span id="1332">1332</span> |
| <span id="1333">1333</span> |
| <span id="1334">1334</span> |
| <span id="1335">1335</span> |
| <span id="1336">1336</span> |
| <span id="1337">1337</span> |
| <span id="1338">1338</span> |
| <span id="1339">1339</span> |
| <span id="1340">1340</span> |
| <span id="1341">1341</span> |
| <span id="1342">1342</span> |
| <span id="1343">1343</span> |
| <span id="1344">1344</span> |
| <span id="1345">1345</span> |
| <span id="1346">1346</span> |
| <span id="1347">1347</span> |
| <span id="1348">1348</span> |
| <span id="1349">1349</span> |
| <span id="1350">1350</span> |
| <span id="1351">1351</span> |
| <span id="1352">1352</span> |
| <span id="1353">1353</span> |
| <span id="1354">1354</span> |
| <span id="1355">1355</span> |
| <span id="1356">1356</span> |
| <span id="1357">1357</span> |
| <span id="1358">1358</span> |
| <span id="1359">1359</span> |
| <span id="1360">1360</span> |
| <span id="1361">1361</span> |
| <span id="1362">1362</span> |
| <span id="1363">1363</span> |
| <span id="1364">1364</span> |
| <span id="1365">1365</span> |
| <span id="1366">1366</span> |
| <span id="1367">1367</span> |
| <span id="1368">1368</span> |
| <span id="1369">1369</span> |
| <span id="1370">1370</span> |
| <span id="1371">1371</span> |
| <span id="1372">1372</span> |
| <span id="1373">1373</span> |
| <span id="1374">1374</span> |
| <span id="1375">1375</span> |
| <span id="1376">1376</span> |
| <span id="1377">1377</span> |
| <span id="1378">1378</span> |
| <span id="1379">1379</span> |
| <span id="1380">1380</span> |
| <span id="1381">1381</span> |
| <span id="1382">1382</span> |
| <span id="1383">1383</span> |
| <span id="1384">1384</span> |
| <span id="1385">1385</span> |
| <span id="1386">1386</span> |
| <span id="1387">1387</span> |
| <span id="1388">1388</span> |
| <span id="1389">1389</span> |
| <span id="1390">1390</span> |
| <span id="1391">1391</span> |
| <span id="1392">1392</span> |
| <span id="1393">1393</span> |
| <span id="1394">1394</span> |
| <span id="1395">1395</span> |
| <span id="1396">1396</span> |
| <span id="1397">1397</span> |
| <span id="1398">1398</span> |
| <span id="1399">1399</span> |
| <span id="1400">1400</span> |
| <span id="1401">1401</span> |
| <span id="1402">1402</span> |
| <span id="1403">1403</span> |
| <span id="1404">1404</span> |
| <span id="1405">1405</span> |
| <span id="1406">1406</span> |
| <span id="1407">1407</span> |
| <span id="1408">1408</span> |
| <span id="1409">1409</span> |
| <span id="1410">1410</span> |
| <span id="1411">1411</span> |
| <span id="1412">1412</span> |
| <span id="1413">1413</span> |
| <span id="1414">1414</span> |
| <span id="1415">1415</span> |
| <span id="1416">1416</span> |
| <span id="1417">1417</span> |
| <span id="1418">1418</span> |
| <span id="1419">1419</span> |
| <span id="1420">1420</span> |
| <span id="1421">1421</span> |
| <span id="1422">1422</span> |
| <span id="1423">1423</span> |
| <span id="1424">1424</span> |
| <span id="1425">1425</span> |
| <span id="1426">1426</span> |
| <span id="1427">1427</span> |
| <span id="1428">1428</span> |
| <span id="1429">1429</span> |
| <span id="1430">1430</span> |
| <span id="1431">1431</span> |
| <span id="1432">1432</span> |
| <span id="1433">1433</span> |
| <span id="1434">1434</span> |
| <span id="1435">1435</span> |
| <span id="1436">1436</span> |
| <span id="1437">1437</span> |
| <span id="1438">1438</span> |
| <span id="1439">1439</span> |
| <span id="1440">1440</span> |
| <span id="1441">1441</span> |
| <span id="1442">1442</span> |
| <span id="1443">1443</span> |
| <span id="1444">1444</span> |
| <span id="1445">1445</span> |
| <span id="1446">1446</span> |
| <span id="1447">1447</span> |
| <span id="1448">1448</span> |
| <span id="1449">1449</span> |
| <span id="1450">1450</span> |
| <span id="1451">1451</span> |
| <span id="1452">1452</span> |
| <span id="1453">1453</span> |
| <span id="1454">1454</span> |
| <span id="1455">1455</span> |
| <span id="1456">1456</span> |
| <span id="1457">1457</span> |
| <span id="1458">1458</span> |
| <span id="1459">1459</span> |
| <span id="1460">1460</span> |
| <span id="1461">1461</span> |
| <span id="1462">1462</span> |
| <span id="1463">1463</span> |
| <span id="1464">1464</span> |
| <span id="1465">1465</span> |
| <span id="1466">1466</span> |
| <span id="1467">1467</span> |
| <span id="1468">1468</span> |
| <span id="1469">1469</span> |
| <span id="1470">1470</span> |
| <span id="1471">1471</span> |
| <span id="1472">1472</span> |
| <span id="1473">1473</span> |
| <span id="1474">1474</span> |
| <span id="1475">1475</span> |
| <span id="1476">1476</span> |
| <span id="1477">1477</span> |
| <span id="1478">1478</span> |
| <span id="1479">1479</span> |
| <span id="1480">1480</span> |
| <span id="1481">1481</span> |
| <span id="1482">1482</span> |
| <span id="1483">1483</span> |
| <span id="1484">1484</span> |
| <span id="1485">1485</span> |
| <span id="1486">1486</span> |
| <span id="1487">1487</span> |
| <span id="1488">1488</span> |
| <span id="1489">1489</span> |
| <span id="1490">1490</span> |
| <span id="1491">1491</span> |
| <span id="1492">1492</span> |
| <span id="1493">1493</span> |
| <span id="1494">1494</span> |
| <span id="1495">1495</span> |
| <span id="1496">1496</span> |
| <span id="1497">1497</span> |
| <span id="1498">1498</span> |
| <span id="1499">1499</span> |
| <span id="1500">1500</span> |
| <span id="1501">1501</span> |
| <span id="1502">1502</span> |
| <span id="1503">1503</span> |
| <span id="1504">1504</span> |
| <span id="1505">1505</span> |
| <span id="1506">1506</span> |
| <span id="1507">1507</span> |
| <span id="1508">1508</span> |
| <span id="1509">1509</span> |
| <span id="1510">1510</span> |
| <span id="1511">1511</span> |
| <span id="1512">1512</span> |
| <span id="1513">1513</span> |
| <span id="1514">1514</span> |
| <span id="1515">1515</span> |
| </pre><pre class="rust"><code><span class="kw">use </span>std::ops::{Index, IndexMut}; |
| |
| <span class="kw">use </span>num_traits::{NumCast, ToPrimitive, Zero}; |
| |
| <span class="kw">use </span><span class="kw">crate</span>::traits::{Pixel, Primitive}; |
| |
| <span class="doccomment">/// An enumeration over supported color types and bit depths |
| </span><span class="attribute">#[derive(Copy, PartialEq, Eq, Debug, Clone, Hash)] |
| </span><span class="kw">pub enum </span>ColorType { |
| <span class="doccomment">/// Pixel is 8-bit luminance |
| </span>L8, |
| <span class="doccomment">/// Pixel is 8-bit luminance with an alpha channel |
| </span>La8, |
| <span class="doccomment">/// Pixel contains 8-bit R, G and B channels |
| </span>Rgb8, |
| <span class="doccomment">/// Pixel is 8-bit RGB with an alpha channel |
| </span>Rgba8, |
| |
| <span class="doccomment">/// Pixel is 16-bit luminance |
| </span>L16, |
| <span class="doccomment">/// Pixel is 16-bit luminance with an alpha channel |
| </span>La16, |
| <span class="doccomment">/// Pixel is 16-bit RGB |
| </span>Rgb16, |
| <span class="doccomment">/// Pixel is 16-bit RGBA |
| </span>Rgba16, |
| |
| <span class="doccomment">/// Pixel contains 8-bit B, G and R channels |
| </span>Bgr8, |
| <span class="doccomment">/// Pixel is 8-bit BGR with an alpha channel |
| </span>Bgra8, |
| |
| <span class="attribute">#[doc(hidden)] |
| </span>__NonExhaustive(<span class="kw">crate</span>::utils::NonExhaustiveMarker), |
| } |
| |
| <span class="kw">impl </span>ColorType { |
| <span class="doccomment">/// Returns the number of bytes contained in a pixel of `ColorType` ```c``` |
| </span><span class="kw">pub fn </span>bytes_per_pixel(<span class="self">self</span>) -> u8 { |
| <span class="kw">match </span><span class="self">self </span>{ |
| ColorType::L8 => <span class="number">1</span>, |
| ColorType::L16 | ColorType::La8 => <span class="number">2</span>, |
| ColorType::Rgb8 | ColorType::Bgr8 => <span class="number">3</span>, |
| ColorType::Rgba8 | ColorType::Bgra8 | ColorType::La16 => <span class="number">4</span>, |
| ColorType::Rgb16 => <span class="number">6</span>, |
| ColorType::Rgba16 => <span class="number">8</span>, |
| ColorType::__NonExhaustive(marker) => <span class="kw">match </span>marker._private {}, |
| } |
| } |
| |
| <span class="doccomment">/// Returns if there is an alpha channel. |
| </span><span class="kw">pub fn </span>has_alpha(<span class="self">self</span>) -> bool { |
| <span class="kw">use </span>ColorType::<span class="kw-2">*</span>; |
| <span class="kw">match </span><span class="self">self </span>{ |
| L8 | L16 | Rgb8 | Bgr8 | Rgb16 => <span class="bool-val">false</span>, |
| La8 | Rgba8 | Bgra8 | La16 | Rgba16 => <span class="bool-val">true</span>, |
| __NonExhaustive(marker) => <span class="kw">match </span>marker._private {}, |
| } |
| } |
| |
| <span class="doccomment">/// Returns false if the color scheme is grayscale, true otherwise. |
| </span><span class="kw">pub fn </span>has_color(<span class="self">self</span>) -> bool { |
| <span class="kw">use </span>ColorType::<span class="kw-2">*</span>; |
| <span class="kw">match </span><span class="self">self </span>{ |
| L8 | L16 | La8 | La16 => <span class="bool-val">false</span>, |
| Rgb8 | Bgr8 | Rgb16 | Rgba8 | Bgra8 | Rgba16 => <span class="bool-val">true</span>, |
| __NonExhaustive(marker) => <span class="kw">match </span>marker._private {}, |
| } |
| } |
| |
| <span class="doccomment">/// Returns the number of bits contained in a pixel of `ColorType` ```c``` (which will always be |
| /// a multiple of 8). |
| </span><span class="kw">pub fn </span>bits_per_pixel(<span class="self">self</span>) -> u16 { |
| <u16 <span class="kw">as </span>From<u8>>::from(<span class="self">self</span>.bytes_per_pixel()) * <span class="number">8 |
| </span>} |
| |
| <span class="doccomment">/// Returns the number of color channels that make up this pixel |
| </span><span class="kw">pub fn </span>channel_count(<span class="self">self</span>) -> u8 { |
| <span class="kw">let </span>e: ExtendedColorType = <span class="self">self</span>.into(); |
| e.channel_count() |
| } |
| } |
| |
| <span class="doccomment">/// An enumeration of color types encountered in image formats. |
| /// |
| /// This is not exhaustive over all existing image formats but should be granular enough to allow |
| /// round tripping of decoding and encoding as much as possible. The variants will be extended as |
| /// necessary to enable this. |
| /// |
| /// Another purpose is to advise users of a rough estimate of the accuracy and effort of the |
| /// decoding from and encoding to such an image format. |
| </span><span class="attribute">#[derive(Copy, PartialEq, Eq, Debug, Clone, Hash)] |
| </span><span class="kw">pub enum </span>ExtendedColorType { |
| <span class="doccomment">/// Pixel is 8-bit alpha |
| </span>A8, |
| <span class="doccomment">/// Pixel is 1-bit luminance |
| </span>L1, |
| <span class="doccomment">/// Pixel is 1-bit luminance with an alpha channel |
| </span>La1, |
| <span class="doccomment">/// Pixel contains 1-bit R, G and B channels |
| </span>Rgb1, |
| <span class="doccomment">/// Pixel is 1-bit RGB with an alpha channel |
| </span>Rgba1, |
| <span class="doccomment">/// Pixel is 2-bit luminance |
| </span>L2, |
| <span class="doccomment">/// Pixel is 2-bit luminance with an alpha channel |
| </span>La2, |
| <span class="doccomment">/// Pixel contains 2-bit R, G and B channels |
| </span>Rgb2, |
| <span class="doccomment">/// Pixel is 2-bit RGB with an alpha channel |
| </span>Rgba2, |
| <span class="doccomment">/// Pixel is 4-bit luminance |
| </span>L4, |
| <span class="doccomment">/// Pixel is 4-bit luminance with an alpha channel |
| </span>La4, |
| <span class="doccomment">/// Pixel contains 4-bit R, G and B channels |
| </span>Rgb4, |
| <span class="doccomment">/// Pixel is 4-bit RGB with an alpha channel |
| </span>Rgba4, |
| <span class="doccomment">/// Pixel is 8-bit luminance |
| </span>L8, |
| <span class="doccomment">/// Pixel is 8-bit luminance with an alpha channel |
| </span>La8, |
| <span class="doccomment">/// Pixel contains 8-bit R, G and B channels |
| </span>Rgb8, |
| <span class="doccomment">/// Pixel is 8-bit RGB with an alpha channel |
| </span>Rgba8, |
| <span class="doccomment">/// Pixel is 16-bit luminance |
| </span>L16, |
| <span class="doccomment">/// Pixel is 16-bit luminance with an alpha channel |
| </span>La16, |
| <span class="doccomment">/// Pixel contains 16-bit R, G and B channels |
| </span>Rgb16, |
| <span class="doccomment">/// Pixel is 16-bit RGB with an alpha channel |
| </span>Rgba16, |
| <span class="doccomment">/// Pixel contains 8-bit B, G and R channels |
| </span>Bgr8, |
| <span class="doccomment">/// Pixel is 8-bit BGR with an alpha channel |
| </span>Bgra8, |
| |
| <span class="doccomment">/// Pixel is of unknown color type with the specified bits per pixel. This can apply to pixels |
| /// which are associated with an external palette. In that case, the pixel value is an index |
| /// into the palette. |
| </span>Unknown(u8), |
| |
| <span class="attribute">#[doc(hidden)] |
| </span>__NonExhaustive(<span class="kw">crate</span>::utils::NonExhaustiveMarker), |
| } |
| |
| <span class="kw">impl </span>ExtendedColorType { |
| <span class="doccomment">/// Get the number of channels for colors of this type. |
| /// |
| /// Note that the `Unknown` variant returns a value of `1` since pixels can only be treated as |
| /// an opaque datum by the library. |
| </span><span class="kw">pub fn </span>channel_count(<span class="self">self</span>) -> u8 { |
| <span class="kw">match </span><span class="self">self </span>{ |
| ExtendedColorType::A8 | |
| ExtendedColorType::L1 | |
| ExtendedColorType::L2 | |
| ExtendedColorType::L4 | |
| ExtendedColorType::L8 | |
| ExtendedColorType::L16 | |
| ExtendedColorType::Unknown(<span class="kw">_</span>) => <span class="number">1</span>, |
| ExtendedColorType::La1 | |
| ExtendedColorType::La2 | |
| ExtendedColorType::La4 | |
| ExtendedColorType::La8 | |
| ExtendedColorType::La16 => <span class="number">2</span>, |
| ExtendedColorType::Rgb1 | |
| ExtendedColorType::Rgb2 | |
| ExtendedColorType::Rgb4 | |
| ExtendedColorType::Rgb8 | |
| ExtendedColorType::Rgb16 | |
| ExtendedColorType::Bgr8 => <span class="number">3</span>, |
| ExtendedColorType::Rgba1 | |
| ExtendedColorType::Rgba2 | |
| ExtendedColorType::Rgba4 | |
| ExtendedColorType::Rgba8 | |
| ExtendedColorType::Rgba16 | |
| ExtendedColorType::Bgra8 => <span class="number">4</span>, |
| ExtendedColorType::__NonExhaustive(marker) => <span class="kw">match </span>marker._private {}, |
| } |
| } |
| } |
| <span class="kw">impl </span>From<ColorType> <span class="kw">for </span>ExtendedColorType { |
| <span class="kw">fn </span>from(c: ColorType) -> <span class="self">Self </span>{ |
| <span class="kw">match </span>c { |
| ColorType::L8 => ExtendedColorType::L8, |
| ColorType::La8 => ExtendedColorType::La8, |
| ColorType::Rgb8 => ExtendedColorType::Rgb8, |
| ColorType::Rgba8 => ExtendedColorType::Rgba8, |
| ColorType::L16 => ExtendedColorType::L16, |
| ColorType::La16 => ExtendedColorType::La16, |
| ColorType::Rgb16 => ExtendedColorType::Rgb16, |
| ColorType::Rgba16 => ExtendedColorType::Rgba16, |
| ColorType::Bgr8 => ExtendedColorType::Bgr8, |
| ColorType::Bgra8 => ExtendedColorType::Bgra8, |
| ColorType::__NonExhaustive(marker) => <span class="kw">match </span>marker._private {}, |
| } |
| } |
| } |
| |
| <span class="macro">macro_rules! </span>define_colors { |
| {$( |
| <span class="macro-nonterminal">$ident</span>:ident, |
| <span class="macro-nonterminal">$channels</span>: expr, |
| <span class="macro-nonterminal">$alphas</span>: expr, |
| <span class="macro-nonterminal">$interpretation</span>: expr, |
| <span class="macro-nonterminal">$color_type_u8</span>: expr, |
| <span class="macro-nonterminal">$color_type_u16</span>: expr, |
| <span class="attribute">#[<span class="macro-nonterminal">$doc</span>:meta]</span>; |
| )<span class="kw-2">*</span>} => { |
| |
| $( <span class="comment">// START Structure definitions |
| |
| </span><span class="attribute">#[<span class="macro-nonterminal">$doc</span>] |
| #[derive(PartialEq, Eq, Clone, Debug, Copy, Hash)] |
| #[repr(C)] |
| #[allow(missing_docs)] |
| </span><span class="kw">pub struct </span><span class="macro-nonterminal">$ident</span><T: Primitive> (<span class="kw">pub </span>[T; <span class="macro-nonterminal">$channels</span>]); |
| |
| <span class="kw">impl</span><T: Primitive + <span class="lifetime">'static</span>> Pixel <span class="kw">for </span><span class="macro-nonterminal">$ident</span><T> { |
| <span class="kw">type </span>Subpixel = T; |
| |
| <span class="kw">const </span>CHANNEL_COUNT: u8 = <span class="macro-nonterminal">$channels</span>; |
| |
| <span class="kw">const </span>COLOR_MODEL: <span class="kw-2">&</span><span class="lifetime">'static </span>str = <span class="macro-nonterminal">$interpretation</span>; |
| |
| <span class="kw">const </span>COLOR_TYPE: ColorType = |
| [<span class="macro-nonterminal">$color_type_u8</span>, <span class="macro-nonterminal">$color_type_u16</span>][(std::mem::size_of::<T>() > <span class="number">1</span>) <span class="kw">as </span>usize]; |
| |
| <span class="attribute">#[inline(always)] |
| </span><span class="kw">fn </span>channels(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>[T] { |
| <span class="kw-2">&</span><span class="self">self</span>.<span class="number">0 |
| </span>} |
| <span class="attribute">#[inline(always)] |
| </span><span class="kw">fn </span>channels_mut(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="kw-2">&mut </span>[T] { |
| <span class="kw-2">&mut </span><span class="self">self</span>.<span class="number">0 |
| </span>} |
| |
| <span class="kw">fn </span>channels4(<span class="kw-2">&</span><span class="self">self</span>) -> (T, T, T, T) { |
| <span class="kw">const </span>CHANNELS: usize = <span class="macro-nonterminal">$channels</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>channels = [T::max_value(); <span class="number">4</span>]; |
| channels[<span class="number">0</span>..CHANNELS].copy_from_slice(<span class="kw-2">&</span><span class="self">self</span>.<span class="number">0</span>); |
| (channels[<span class="number">0</span>], channels[<span class="number">1</span>], channels[<span class="number">2</span>], channels[<span class="number">3</span>]) |
| } |
| |
| <span class="kw">fn </span>from_channels(a: T, b: T, c: T, d: T,) -> <span class="macro-nonterminal">$ident</span><T> { |
| <span class="kw">const </span>CHANNELS: usize = <span class="macro-nonterminal">$channels</span>; |
| <span class="kw-2">*</span><<span class="macro-nonterminal">$ident</span><T> <span class="kw">as </span>Pixel>::from_slice(<span class="kw-2">&</span>[a, b, c, d][..CHANNELS]) |
| } |
| |
| <span class="kw">fn </span>from_slice(slice: <span class="kw-2">&</span>[T]) -> <span class="kw-2">&</span><span class="macro-nonterminal">$ident</span><T> { |
| <span class="macro">assert_eq!</span>(slice.len(), <span class="macro-nonterminal">$channels</span>); |
| <span class="kw">unsafe </span>{ <span class="kw-2">&*</span>(slice.as_ptr() <span class="kw">as </span><span class="kw-2">*const </span><span class="macro-nonterminal">$ident</span><T>) } |
| } |
| <span class="kw">fn </span>from_slice_mut(slice: <span class="kw-2">&mut </span>[T]) -> <span class="kw-2">&mut </span><span class="macro-nonterminal">$ident</span><T> { |
| <span class="macro">assert_eq!</span>(slice.len(), <span class="macro-nonterminal">$channels</span>); |
| <span class="kw">unsafe </span>{ <span class="kw-2">&mut *</span>(slice.as_mut_ptr() <span class="kw">as </span><span class="kw-2">*mut </span><span class="macro-nonterminal">$ident</span><T>) } |
| } |
| |
| <span class="kw">fn </span>to_rgb(<span class="kw-2">&</span><span class="self">self</span>) -> Rgb<T> { |
| <span class="kw">let </span><span class="kw-2">mut </span>pix = Rgb([Zero::zero(), Zero::zero(), Zero::zero()]); |
| pix.from_color(<span class="self">self</span>); |
| pix |
| } |
| |
| <span class="kw">fn </span>to_bgr(<span class="kw-2">&</span><span class="self">self</span>) -> Bgr<T> { |
| <span class="kw">let </span><span class="kw-2">mut </span>pix = Bgr([Zero::zero(), Zero::zero(), Zero::zero()]); |
| pix.from_color(<span class="self">self</span>); |
| pix |
| } |
| |
| <span class="kw">fn </span>to_rgba(<span class="kw-2">&</span><span class="self">self</span>) -> Rgba<T> { |
| <span class="kw">let </span><span class="kw-2">mut </span>pix = Rgba([Zero::zero(), Zero::zero(), Zero::zero(), Zero::zero()]); |
| pix.from_color(<span class="self">self</span>); |
| pix |
| } |
| |
| <span class="kw">fn </span>to_bgra(<span class="kw-2">&</span><span class="self">self</span>) -> Bgra<T> { |
| <span class="kw">let </span><span class="kw-2">mut </span>pix = Bgra([Zero::zero(), Zero::zero(), Zero::zero(), Zero::zero()]); |
| pix.from_color(<span class="self">self</span>); |
| pix |
| } |
| |
| <span class="kw">fn </span>to_luma(<span class="kw-2">&</span><span class="self">self</span>) -> Luma<T> { |
| <span class="kw">let </span><span class="kw-2">mut </span>pix = Luma([Zero::zero()]); |
| pix.from_color(<span class="self">self</span>); |
| pix |
| } |
| |
| <span class="kw">fn </span>to_luma_alpha(<span class="kw-2">&</span><span class="self">self</span>) -> LumaA<T> { |
| <span class="kw">let </span><span class="kw-2">mut </span>pix = LumaA([Zero::zero(), Zero::zero()]); |
| pix.from_color(<span class="self">self</span>); |
| pix |
| } |
| |
| <span class="kw">fn </span>map<F>(& <span class="self">self</span>, f: F) -> <span class="macro-nonterminal">$ident</span><T> <span class="kw">where </span>F: FnMut(T) -> T { |
| <span class="kw">let </span><span class="kw-2">mut </span>this = (<span class="kw-2">*</span><span class="self">self</span>).clone(); |
| this.apply(f); |
| this |
| } |
| |
| <span class="kw">fn </span>apply<F>(<span class="kw-2">&mut </span><span class="self">self</span>, <span class="kw-2">mut </span>f: F) <span class="kw">where </span>F: FnMut(T) -> T { |
| <span class="kw">for </span>v <span class="kw">in </span><span class="kw-2">&mut </span><span class="self">self</span>.<span class="number">0 </span>{ |
| <span class="kw-2">*</span>v = f(<span class="kw-2">*</span>v) |
| } |
| } |
| |
| <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="macro-nonterminal">$ident</span><T> <span class="kw">where </span>F: FnMut(T) -> T, G: FnMut(T) -> T { |
| <span class="kw">let </span><span class="kw-2">mut </span>this = (<span class="kw-2">*</span><span class="self">self</span>).clone(); |
| this.apply_with_alpha(f, g); |
| this |
| } |
| |
| <span class="kw">fn </span>apply_with_alpha<F, G>(<span class="kw-2">&mut </span><span class="self">self</span>, <span class="kw-2">mut </span>f: F, <span class="kw-2">mut </span>g: G) <span class="kw">where </span>F: FnMut(T) -> T, G: FnMut(T) -> T { |
| <span class="kw">const </span>ALPHA: usize = <span class="macro-nonterminal">$channels </span>- <span class="macro-nonterminal">$alphas</span>; |
| <span class="kw">for </span>v <span class="kw">in </span><span class="self">self</span>.<span class="number">0</span>[..ALPHA].iter_mut() { |
| <span class="kw-2">*</span>v = f(<span class="kw-2">*</span>v) |
| } |
| <span class="comment">// The branch of this match is `const`. This way ensures that no subexpression fails the |
| // `const_err` lint (the expression `self.0[ALPHA]` would). |
| </span><span class="kw">if let </span><span class="prelude-val">Some</span>(v) = <span class="self">self</span>.<span class="number">0</span>.get_mut(ALPHA) { |
| <span class="kw-2">*</span>v = g(<span class="kw-2">*</span>v) |
| } |
| } |
| |
| <span class="kw">fn </span>map2<F>(<span class="kw-2">&</span><span class="self">self</span>, other: <span class="kw-2">&</span><span class="self">Self</span>, f: F) -> <span class="macro-nonterminal">$ident</span><T> <span class="kw">where </span>F: FnMut(T, T) -> T { |
| <span class="kw">let </span><span class="kw-2">mut </span>this = (<span class="kw-2">*</span><span class="self">self</span>).clone(); |
| this.apply2(other, f); |
| this |
| } |
| |
| <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="macro-nonterminal">$ident</span><T>, <span class="kw-2">mut </span>f: F) <span class="kw">where </span>F: FnMut(T, T) -> T { |
| <span class="kw">for </span>(a, <span class="kw-2">&</span>b) <span class="kw">in </span><span class="self">self</span>.<span class="number">0</span>.iter_mut().zip(other.<span class="number">0</span>.iter()) { |
| <span class="kw-2">*</span>a = f(<span class="kw-2">*</span>a, b) |
| } |
| } |
| |
| <span class="kw">fn </span>invert(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| Invert::invert(<span class="self">self</span>) |
| } |
| |
| <span class="kw">fn </span>blend(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span><span class="macro-nonterminal">$ident</span><T>) { |
| Blend::blend(<span class="self">self</span>, other) |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive> Index<usize> <span class="kw">for </span><span class="macro-nonterminal">$ident</span><T> { |
| <span class="kw">type </span>Output = T; |
| <span class="attribute">#[inline(always)] |
| </span><span class="kw">fn </span>index(<span class="kw-2">&</span><span class="self">self</span>, _index: usize) -> <span class="kw-2">&</span>T { |
| <span class="kw-2">&</span><span class="self">self</span>.<span class="number">0</span>[_index] |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive> IndexMut<usize> <span class="kw">for </span><span class="macro-nonterminal">$ident</span><T> { |
| <span class="attribute">#[inline(always)] |
| </span><span class="kw">fn </span>index_mut(<span class="kw-2">&mut </span><span class="self">self</span>, _index: usize) -> <span class="kw-2">&mut </span>T { |
| <span class="kw-2">&mut </span><span class="self">self</span>.<span class="number">0</span>[_index] |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive + <span class="lifetime">'static</span>> From<[T; <span class="macro-nonterminal">$channels</span>]> <span class="kw">for </span><span class="macro-nonterminal">$ident</span><T> { |
| <span class="kw">fn </span>from(c: [T; <span class="macro-nonterminal">$channels</span>]) -> <span class="self">Self </span>{ |
| <span class="self">Self</span>(c) |
| } |
| } |
| |
| )* <span class="comment">// END Structure definitions |
| |
| </span>} |
| } |
| |
| <span class="macro">define_colors! </span>{ |
| Rgb, <span class="number">3</span>, <span class="number">0</span>, <span class="string">"RGB"</span>, ColorType::Rgb8, ColorType::Rgb16, <span class="attribute">#[doc = <span class="string">"RGB colors"</span>]</span>; |
| Bgr, <span class="number">3</span>, <span class="number">0</span>, <span class="string">"BGR"</span>, ColorType::Bgr8, ColorType::Bgr8, <span class="attribute">#[doc = <span class="string">"BGR colors"</span>]</span>; |
| Luma, <span class="number">1</span>, <span class="number">0</span>, <span class="string">"Y"</span>, ColorType::L8, ColorType::L16, <span class="attribute">#[doc = <span class="string">"Grayscale colors"</span>]</span>; |
| Rgba, <span class="number">4</span>, <span class="number">1</span>, <span class="string">"RGBA"</span>, ColorType::Rgba8, ColorType::Rgba16, <span class="attribute">#[doc = <span class="string">"RGB colors + alpha channel"</span>]</span>; |
| Bgra, <span class="number">4</span>, <span class="number">1</span>, <span class="string">"BGRA"</span>, ColorType::Bgra8, ColorType::Bgra8, <span class="attribute">#[doc = <span class="string">"BGR colors + alpha channel"</span>]</span>; |
| LumaA, <span class="number">2</span>, <span class="number">1</span>, <span class="string">"YA"</span>, ColorType::La8, ColorType::La16, <span class="attribute">#[doc = <span class="string">"Grayscale colors + alpha channel"</span>]</span>; |
| } |
| |
| <span class="doccomment">/// Provides color conversions for the different pixel types. |
| </span><span class="kw">pub trait </span>FromColor<Other> { |
| <span class="doccomment">/// Changes `self` to represent `Other` in the color space of `Self` |
| </span><span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, <span class="kw">_</span>: <span class="kw-2">&</span>Other); |
| } |
| |
| <span class="comment">// Self->Self: just copy |
| </span><span class="kw">impl</span><A: Copy> FromColor<A> <span class="kw">for </span>A { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>A) { |
| <span class="kw-2">*</span><span class="self">self </span>= <span class="kw-2">*</span>other; |
| } |
| } |
| |
| <span class="doccomment">/// Copy-based conversions to target pixel types using `FromColor`. |
| </span><span class="comment">// FIXME: this trait should be removed and replaced with real color space models |
| // rather than assuming sRGB. |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">trait </span>IntoColor<Other> { |
| <span class="doccomment">/// Constructs a pixel of the target type and converts this pixel into it. |
| </span><span class="kw">fn </span>into_color(<span class="kw-2">&</span><span class="self">self</span>) -> Other; |
| } |
| |
| <span class="kw">impl</span><O, S> IntoColor<O> <span class="kw">for </span>S |
| <span class="kw">where |
| </span>O: Pixel + FromColor<S> { |
| <span class="kw">fn </span>into_color(<span class="kw-2">&</span><span class="self">self</span>) -> O { |
| <span class="comment">// Note we cannot use Pixel::CHANNELS_COUNT here to directly construct |
| // the pixel due to a current bug/limitation of consts. |
| </span><span class="kw">let </span><span class="kw-2">mut </span>pix = O::from_channels(Zero::zero(), Zero::zero(), Zero::zero(), Zero::zero()); |
| pix.from_color(<span class="self">self</span>); |
| pix |
| } |
| } |
| |
| <span class="doccomment">/// Coefficients to transform from sRGB to a CIE Y (luminance) value. |
| </span><span class="kw">const </span>SRGB_LUMA: [f32; <span class="number">3</span>] = [<span class="number">0.2126</span>, <span class="number">0.7152</span>, <span class="number">0.0722</span>]; |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>rgb_to_luma<T: Primitive>(rgb: <span class="kw-2">&</span>[T]) -> T { |
| <span class="kw">let </span>l = SRGB_LUMA[<span class="number">0</span>] * rgb[<span class="number">0</span>].to_f32().unwrap() |
| + SRGB_LUMA[<span class="number">1</span>] * rgb[<span class="number">1</span>].to_f32().unwrap() |
| + SRGB_LUMA[<span class="number">2</span>] * rgb[<span class="number">2</span>].to_f32().unwrap(); |
| NumCast::from(l).unwrap() |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>bgr_to_luma<T: Primitive>(bgr: <span class="kw-2">&</span>[T]) -> T { |
| <span class="kw">let </span>l = SRGB_LUMA[<span class="number">0</span>] * bgr[<span class="number">2</span>].to_f32().unwrap() |
| + SRGB_LUMA[<span class="number">1</span>] * bgr[<span class="number">1</span>].to_f32().unwrap() |
| + SRGB_LUMA[<span class="number">2</span>] * bgr[<span class="number">0</span>].to_f32().unwrap(); |
| NumCast::from(l).unwrap() |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>downcast_channel(c16: u16) -> u8 { |
| NumCast::from(c16.to_u64().unwrap() >> <span class="number">8</span>).unwrap() |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>upcast_channel(c8: u8) -> u16 { |
| NumCast::from(c8.to_u64().unwrap() << <span class="number">8</span>).unwrap() |
| } |
| |
| |
| <span class="comment">// `FromColor` for Luma |
| |
| </span><span class="kw">impl</span><T: Primitive + <span class="lifetime">'static</span>> FromColor<Rgba<T>> <span class="kw">for </span>Luma<T> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Rgba<T>) { |
| <span class="kw">let </span>gray = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>rgba = other.channels(); |
| gray[<span class="number">0</span>] = rgb_to_luma(rgba); |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive + <span class="lifetime">'static</span>> FromColor<Bgra<T>> <span class="kw">for </span>Luma<T> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Bgra<T>) { |
| <span class="kw">let </span>gray = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>bgra = other.channels(); |
| gray[<span class="number">0</span>] = bgr_to_luma(bgra); |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive + <span class="lifetime">'static</span>> FromColor<Rgb<T>> <span class="kw">for </span>Luma<T> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Rgb<T>) { |
| <span class="kw">let </span>gray = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>rgb = other.channels(); |
| gray[<span class="number">0</span>] = rgb_to_luma(rgb); |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive + <span class="lifetime">'static</span>> FromColor<Bgr<T>> <span class="kw">for </span>Luma<T> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Bgr<T>) { |
| <span class="kw">let </span>gray = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>bgr = other.channels(); |
| gray[<span class="number">0</span>] = bgr_to_luma(bgr); |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive + <span class="lifetime">'static</span>> FromColor<LumaA<T>> <span class="kw">for </span>Luma<T> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>LumaA<T>) { |
| <span class="self">self</span>.channels_mut()[<span class="number">0</span>] = other.channels()[<span class="number">0</span>] |
| } |
| } |
| |
| |
| <span class="kw">impl </span>FromColor<Rgba<u16>> <span class="kw">for </span>Luma<u8> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Rgba<u16>) { |
| <span class="kw">let </span>gray = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>rgb = other.channels(); |
| <span class="kw">let </span>l = rgb_to_luma(rgb); |
| gray[<span class="number">0</span>] = downcast_channel(l); |
| } |
| } |
| |
| <span class="kw">impl </span>FromColor<Rgb<u16>> <span class="kw">for </span>Luma<u8> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Rgb<u16>) { |
| <span class="kw">let </span>gray = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>rgb = other.channels(); |
| <span class="kw">let </span>l = rgb_to_luma(rgb); |
| gray[<span class="number">0</span>] = downcast_channel(l); |
| } |
| } |
| |
| <span class="kw">impl </span>FromColor<Luma<u16>> <span class="kw">for </span>Luma<u8> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Luma<u16>) { |
| <span class="kw">let </span>l = other.channels()[<span class="number">0</span>]; |
| <span class="self">self</span>.channels_mut()[<span class="number">0</span>] = downcast_channel(l); |
| } |
| } |
| |
| <span class="kw">impl </span>FromColor<Luma<u8>> <span class="kw">for </span>Luma<u16> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Luma<u8>) { |
| <span class="kw">let </span>l = other.channels()[<span class="number">0</span>]; |
| <span class="self">self</span>.channels_mut()[<span class="number">0</span>] = upcast_channel(l); |
| } |
| } |
| |
| <span class="kw">impl </span>FromColor<LumaA<u16>> <span class="kw">for </span>Luma<u8> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>LumaA<u16>) { |
| <span class="kw">let </span>l = other.channels()[<span class="number">0</span>]; |
| <span class="self">self</span>.channels_mut()[<span class="number">0</span>] = downcast_channel(l); |
| } |
| } |
| |
| <span class="kw">impl </span>FromColor<LumaA<u8>> <span class="kw">for </span>Luma<u16> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>LumaA<u8>) { |
| <span class="kw">let </span>la8 = other.channels(); |
| <span class="kw">let </span>gray = <span class="self">self</span>.channels_mut(); |
| gray[<span class="number">0</span>] = upcast_channel(la8[<span class="number">0</span>]); |
| } |
| } |
| |
| <span class="kw">impl </span>FromColor<Rgb<u8>> <span class="kw">for </span>Luma<u16> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Rgb<u8>) { |
| <span class="kw">let </span>rgb = other.channels(); |
| <span class="kw">let </span>gray = <span class="self">self</span>.channels_mut(); |
| gray[<span class="number">0</span>] = upcast_channel(rgb_to_luma(rgb)); |
| } |
| } |
| |
| <span class="kw">impl </span>FromColor<Rgba<u8>> <span class="kw">for </span>Luma<u16> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Rgba<u8>) { |
| <span class="kw">let </span>rgba = other.channels(); |
| <span class="kw">let </span>gray = <span class="self">self</span>.channels_mut(); |
| gray[<span class="number">0</span>] = upcast_channel(rgb_to_luma(rgba)); |
| } |
| } |
| |
| <span class="kw">impl </span>FromColor<Bgr<u8>> <span class="kw">for </span>Luma<u16> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Bgr<u8>) { |
| <span class="kw">let </span>bgr = other.channels(); |
| <span class="kw">let </span>gray = <span class="self">self</span>.channels_mut(); |
| gray[<span class="number">0</span>] = upcast_channel(bgr_to_luma(bgr)); |
| } |
| } |
| |
| <span class="kw">impl </span>FromColor<Bgra<u8>> <span class="kw">for </span>Luma<u16> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Bgra<u8>) { |
| <span class="kw">let </span>bgra = other.channels(); |
| <span class="kw">let </span>gray = <span class="self">self</span>.channels_mut(); |
| gray[<span class="number">0</span>] = upcast_channel(bgr_to_luma(bgra)); |
| } |
| } |
| |
| |
| <span class="comment">// `FromColor` for LumaA |
| |
| </span><span class="kw">impl</span><T: Primitive + <span class="lifetime">'static</span>> FromColor<Rgba<T>> <span class="kw">for </span>LumaA<T> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Rgba<T>) { |
| <span class="kw">let </span>gray_a = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>rgba = other.channels(); |
| gray_a[<span class="number">0</span>] = rgb_to_luma(rgba); |
| gray_a[<span class="number">1</span>] = rgba[<span class="number">3</span>]; |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive + <span class="lifetime">'static</span>> FromColor<Bgra<T>> <span class="kw">for </span>LumaA<T> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Bgra<T>) { |
| <span class="kw">let </span>gray_a = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>bgra = other.channels(); |
| gray_a[<span class="number">0</span>] = bgr_to_luma(bgra); |
| gray_a[<span class="number">1</span>] = bgra[<span class="number">3</span>]; |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive + <span class="lifetime">'static</span>> FromColor<Rgb<T>> <span class="kw">for </span>LumaA<T> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Rgb<T>) { |
| <span class="kw">let </span>gray_a = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>rgb = other.channels(); |
| gray_a[<span class="number">0</span>] = rgb_to_luma(rgb); |
| gray_a[<span class="number">1</span>] = T::max_value(); |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive + <span class="lifetime">'static</span>> FromColor<Bgr<T>> <span class="kw">for </span>LumaA<T> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Bgr<T>) { |
| <span class="kw">let </span>gray_a = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>bgr = other.channels(); |
| gray_a[<span class="number">0</span>] = bgr_to_luma(bgr); |
| gray_a[<span class="number">1</span>] = T::max_value(); |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive + <span class="lifetime">'static</span>> FromColor<Luma<T>> <span class="kw">for </span>LumaA<T> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Luma<T>) { |
| <span class="kw">let </span>gray_a = <span class="self">self</span>.channels_mut(); |
| gray_a[<span class="number">0</span>] = other.channels()[<span class="number">0</span>]; |
| gray_a[<span class="number">1</span>] = T::max_value(); |
| } |
| } |
| |
| <span class="kw">impl </span>FromColor<LumaA<u16>> <span class="kw">for </span>LumaA<u8> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>LumaA<u16>) { |
| <span class="kw">let </span>la8 = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>gray = other.channels()[<span class="number">0</span>]; |
| <span class="kw">let </span>alpha = other.channels()[<span class="number">1</span>]; |
| la8[<span class="number">0</span>] = downcast_channel(gray); |
| la8[<span class="number">1</span>] = downcast_channel(alpha); |
| } |
| } |
| |
| <span class="kw">impl </span>FromColor<LumaA<u8>> <span class="kw">for </span>LumaA<u16> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>LumaA<u8>) { |
| <span class="kw">let </span>la8 = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>gray = other.channels()[<span class="number">0</span>]; |
| <span class="kw">let </span>alpha = other.channels()[<span class="number">1</span>]; |
| la8[<span class="number">0</span>] = upcast_channel(gray); |
| la8[<span class="number">1</span>] = upcast_channel(alpha); |
| } |
| } |
| |
| <span class="kw">impl </span>FromColor<Luma<u8>> <span class="kw">for </span>LumaA<u16> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Luma<u8>) { |
| <span class="kw">let </span>l8 = other.channels()[<span class="number">0</span>]; |
| <span class="kw">let </span>gray_a = <span class="self">self</span>.channels_mut(); |
| gray_a[<span class="number">0</span>] = upcast_channel(l8); |
| gray_a[<span class="number">1</span>] = u16::max_value(); |
| } |
| } |
| |
| <span class="kw">impl </span>FromColor<Rgb<u8>> <span class="kw">for </span>LumaA<u16> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Rgb<u8>) { |
| <span class="kw">let </span>rgb = other.channels(); |
| <span class="kw">let </span>gray_a = <span class="self">self</span>.channels_mut(); |
| gray_a[<span class="number">0</span>] = upcast_channel(rgb_to_luma(rgb)); |
| gray_a[<span class="number">1</span>] = u16::max_value(); |
| } |
| } |
| |
| <span class="kw">impl </span>FromColor<Rgba<u8>> <span class="kw">for </span>LumaA<u16> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Rgba<u8>) { |
| <span class="kw">let </span>rgba = other.channels(); |
| <span class="kw">let </span>gray_a = <span class="self">self</span>.channels_mut(); |
| gray_a[<span class="number">0</span>] = upcast_channel(rgb_to_luma(rgba)); |
| gray_a[<span class="number">1</span>] = upcast_channel(rgba[<span class="number">3</span>]); |
| } |
| } |
| |
| <span class="kw">impl </span>FromColor<Bgr<u8>> <span class="kw">for </span>LumaA<u16> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Bgr<u8>) { |
| <span class="kw">let </span>bgr = other.channels(); |
| <span class="kw">let </span>gray_a = <span class="self">self</span>.channels_mut(); |
| gray_a[<span class="number">0</span>] = upcast_channel(bgr_to_luma(bgr)); |
| gray_a[<span class="number">1</span>] = u16::max_value(); |
| } |
| } |
| |
| <span class="kw">impl </span>FromColor<Bgra<u8>> <span class="kw">for </span>LumaA<u16> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Bgra<u8>) { |
| <span class="kw">let </span>bgra = other.channels(); |
| <span class="kw">let </span>gray_a = <span class="self">self</span>.channels_mut(); |
| gray_a[<span class="number">0</span>] = upcast_channel(bgr_to_luma(bgra)); |
| gray_a[<span class="number">1</span>] = upcast_channel(bgra[<span class="number">3</span>]); |
| } |
| } |
| |
| |
| <span class="comment">// `FromColor` for RGBA |
| |
| </span><span class="kw">impl</span><T: Primitive + <span class="lifetime">'static</span>> FromColor<Rgb<T>> <span class="kw">for </span>Rgba<T> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Rgb<T>) { |
| <span class="kw">let </span>rgba = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>rgb = other.channels(); |
| rgba[<span class="number">0</span>] = rgb[<span class="number">0</span>]; |
| rgba[<span class="number">1</span>] = rgb[<span class="number">1</span>]; |
| rgba[<span class="number">2</span>] = rgb[<span class="number">2</span>]; |
| rgba[<span class="number">3</span>] = T::max_value(); |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive + <span class="lifetime">'static</span>> FromColor<Bgr<T>> <span class="kw">for </span>Rgba<T> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Bgr<T>) { |
| <span class="kw">let </span>rgba = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>bgr = other.channels(); |
| rgba[<span class="number">0</span>] = bgr[<span class="number">2</span>]; |
| rgba[<span class="number">1</span>] = bgr[<span class="number">1</span>]; |
| rgba[<span class="number">2</span>] = bgr[<span class="number">0</span>]; |
| rgba[<span class="number">3</span>] = T::max_value(); |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive + <span class="lifetime">'static</span>> FromColor<Bgra<T>> <span class="kw">for </span>Rgba<T> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Bgra<T>) { |
| <span class="kw">let </span>rgba = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>bgra = other.channels(); |
| rgba[<span class="number">0</span>] = bgra[<span class="number">2</span>]; |
| rgba[<span class="number">1</span>] = bgra[<span class="number">1</span>]; |
| rgba[<span class="number">2</span>] = bgra[<span class="number">0</span>]; |
| rgba[<span class="number">3</span>] = bgra[<span class="number">3</span>]; |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive + <span class="lifetime">'static</span>> FromColor<LumaA<T>> <span class="kw">for </span>Rgba<T> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>LumaA<T>) { |
| <span class="kw">let </span>rgba = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>gray = other.channels(); |
| rgba[<span class="number">0</span>] = gray[<span class="number">0</span>]; |
| rgba[<span class="number">1</span>] = gray[<span class="number">0</span>]; |
| rgba[<span class="number">2</span>] = gray[<span class="number">0</span>]; |
| rgba[<span class="number">3</span>] = gray[<span class="number">1</span>]; |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive + <span class="lifetime">'static</span>> FromColor<Luma<T>> <span class="kw">for </span>Rgba<T> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, gray: <span class="kw-2">&</span>Luma<T>) { |
| <span class="kw">let </span>rgba = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>gray = gray.channels()[<span class="number">0</span>]; |
| rgba[<span class="number">0</span>] = gray; |
| rgba[<span class="number">1</span>] = gray; |
| rgba[<span class="number">2</span>] = gray; |
| rgba[<span class="number">3</span>] = T::max_value(); |
| } |
| } |
| |
| <span class="kw">impl </span>FromColor<Rgba<u16>> <span class="kw">for </span>Rgba<u8> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Rgba<u16>) { |
| <span class="kw">let </span>rgba = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>rgba16 = other.channels(); |
| rgba[<span class="number">0</span>] = downcast_channel(rgba16[<span class="number">0</span>]); |
| rgba[<span class="number">1</span>] = downcast_channel(rgba16[<span class="number">1</span>]); |
| rgba[<span class="number">2</span>] = downcast_channel(rgba16[<span class="number">2</span>]); |
| rgba[<span class="number">3</span>] = downcast_channel(rgba16[<span class="number">3</span>]); |
| } |
| } |
| |
| <span class="kw">impl </span>FromColor<Rgba<u8>> <span class="kw">for </span>Rgba<u16> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Rgba<u8>) { |
| <span class="kw">let </span>rgba = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>rgba8 = other.channels(); |
| rgba[<span class="number">0</span>] = upcast_channel(rgba8[<span class="number">0</span>]); |
| rgba[<span class="number">1</span>] = upcast_channel(rgba8[<span class="number">1</span>]); |
| rgba[<span class="number">2</span>] = upcast_channel(rgba8[<span class="number">2</span>]); |
| rgba[<span class="number">3</span>] = upcast_channel(rgba8[<span class="number">3</span>]); |
| } |
| } |
| |
| <span class="kw">impl </span>FromColor<LumaA<u8>> <span class="kw">for </span>Rgba<u16> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>LumaA<u8>) { |
| <span class="kw">let </span>la8 = other.channels(); |
| <span class="kw">let </span>gray = upcast_channel(la8[<span class="number">0</span>]); |
| <span class="kw">let </span>alpha = upcast_channel(la8[<span class="number">1</span>]); |
| <span class="kw">let </span>rgba = <span class="self">self</span>.channels_mut(); |
| rgba[<span class="number">0</span>] = gray; |
| rgba[<span class="number">1</span>] = gray; |
| rgba[<span class="number">2</span>] = gray; |
| rgba[<span class="number">3</span>] = alpha; |
| } |
| } |
| |
| <span class="kw">impl </span>FromColor<Rgb<u8>> <span class="kw">for </span>Rgba<u16> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Rgb<u8>) { |
| <span class="kw">let </span>rgb = other.channels(); |
| <span class="kw">let </span>rgba = <span class="self">self</span>.channels_mut(); |
| rgba[<span class="number">0</span>] = upcast_channel(rgb[<span class="number">0</span>]); |
| rgba[<span class="number">1</span>] = upcast_channel(rgb[<span class="number">1</span>]); |
| rgba[<span class="number">2</span>] = upcast_channel(rgb[<span class="number">2</span>]); |
| rgba[<span class="number">3</span>] = u16::max_value(); |
| } |
| } |
| |
| <span class="kw">impl </span>FromColor<Luma<u8>> <span class="kw">for </span>Rgba<u16> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Luma<u8>) { |
| <span class="kw">let </span>l8 = other.channels(); |
| <span class="kw">let </span>rgba = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>gray = upcast_channel(l8[<span class="number">0</span>]); |
| rgba[<span class="number">0</span>] = gray; |
| rgba[<span class="number">1</span>] = gray; |
| rgba[<span class="number">2</span>] = gray; |
| rgba[<span class="number">3</span>] = u16::max_value(); |
| } |
| } |
| |
| <span class="kw">impl </span>FromColor<Bgr<u8>> <span class="kw">for </span>Rgba<u16> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Bgr<u8>) { |
| <span class="kw">let </span>bgr = other.channels(); |
| <span class="kw">let </span>rgba = <span class="self">self</span>.channels_mut(); |
| rgba[<span class="number">0</span>] = upcast_channel(bgr[<span class="number">2</span>]); |
| rgba[<span class="number">1</span>] = upcast_channel(bgr[<span class="number">1</span>]); |
| rgba[<span class="number">2</span>] = upcast_channel(bgr[<span class="number">0</span>]); |
| rgba[<span class="number">3</span>] = u16::max_value(); |
| } |
| } |
| |
| <span class="kw">impl </span>FromColor<Bgra<u8>> <span class="kw">for </span>Rgba<u16> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Bgra<u8>) { |
| <span class="kw">let </span>bgra = other.channels(); |
| <span class="kw">let </span>rgba = <span class="self">self</span>.channels_mut(); |
| rgba[<span class="number">0</span>] = upcast_channel(bgra[<span class="number">2</span>]); |
| rgba[<span class="number">1</span>] = upcast_channel(bgra[<span class="number">1</span>]); |
| rgba[<span class="number">2</span>] = upcast_channel(bgra[<span class="number">0</span>]); |
| rgba[<span class="number">3</span>] = upcast_channel(bgra[<span class="number">3</span>]); |
| } |
| } |
| |
| <span class="comment">// `FromColor` for BGRA |
| |
| </span><span class="kw">impl</span><T: Primitive + <span class="lifetime">'static</span>> FromColor<Rgb<T>> <span class="kw">for </span>Bgra<T> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Rgb<T>) { |
| <span class="kw">let </span>bgra = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>rgb = other.channels(); |
| bgra[<span class="number">0</span>] = rgb[<span class="number">2</span>]; |
| bgra[<span class="number">1</span>] = rgb[<span class="number">1</span>]; |
| bgra[<span class="number">2</span>] = rgb[<span class="number">0</span>]; |
| bgra[<span class="number">3</span>] = T::max_value(); |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive + <span class="lifetime">'static</span>> FromColor<Bgr<T>> <span class="kw">for </span>Bgra<T> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Bgr<T>) { |
| <span class="kw">let </span>bgra = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>bgr = other.channels(); |
| bgra[<span class="number">0</span>] = bgr[<span class="number">0</span>]; |
| bgra[<span class="number">1</span>] = bgr[<span class="number">1</span>]; |
| bgra[<span class="number">2</span>] = bgr[<span class="number">2</span>]; |
| bgra[<span class="number">3</span>] = T::max_value(); |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive + <span class="lifetime">'static</span>> FromColor<Rgba<T>> <span class="kw">for </span>Bgra<T> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Rgba<T>) { |
| <span class="kw">let </span>bgra = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>rgba = other.channels(); |
| bgra[<span class="number">2</span>] = rgba[<span class="number">0</span>]; |
| bgra[<span class="number">1</span>] = rgba[<span class="number">1</span>]; |
| bgra[<span class="number">0</span>] = rgba[<span class="number">2</span>]; |
| bgra[<span class="number">3</span>] = rgba[<span class="number">3</span>]; |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive + <span class="lifetime">'static</span>> FromColor<LumaA<T>> <span class="kw">for </span>Bgra<T> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>LumaA<T>) { |
| <span class="kw">let </span>bgra = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>gray = other.channels(); |
| bgra[<span class="number">0</span>] = gray[<span class="number">0</span>]; |
| bgra[<span class="number">1</span>] = gray[<span class="number">0</span>]; |
| bgra[<span class="number">2</span>] = gray[<span class="number">0</span>]; |
| bgra[<span class="number">3</span>] = gray[<span class="number">1</span>]; |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive + <span class="lifetime">'static</span>> FromColor<Luma<T>> <span class="kw">for </span>Bgra<T> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, gray: <span class="kw-2">&</span>Luma<T>) { |
| <span class="kw">let </span>bgra = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>gray = gray.channels()[<span class="number">0</span>]; |
| bgra[<span class="number">0</span>] = gray; |
| bgra[<span class="number">1</span>] = gray; |
| bgra[<span class="number">2</span>] = gray; |
| bgra[<span class="number">3</span>] = T::max_value(); |
| } |
| } |
| |
| |
| <span class="comment">// `FromColor` for RGB |
| |
| </span><span class="kw">impl</span><T: Primitive + <span class="lifetime">'static</span>> FromColor<Rgba<T>> <span class="kw">for </span>Rgb<T> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Rgba<T>) { |
| <span class="kw">let </span>rgb = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>rgba = other.channels(); |
| rgb[<span class="number">0</span>] = rgba[<span class="number">0</span>]; |
| rgb[<span class="number">1</span>] = rgba[<span class="number">1</span>]; |
| rgb[<span class="number">2</span>] = rgba[<span class="number">2</span>]; |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive + <span class="lifetime">'static</span>> FromColor<Bgra<T>> <span class="kw">for </span>Rgb<T> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Bgra<T>) { |
| <span class="kw">let </span>rgb = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>bgra = other.channels(); |
| rgb[<span class="number">0</span>] = bgra[<span class="number">2</span>]; |
| rgb[<span class="number">1</span>] = bgra[<span class="number">1</span>]; |
| rgb[<span class="number">2</span>] = bgra[<span class="number">0</span>]; |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive + <span class="lifetime">'static</span>> FromColor<Bgr<T>> <span class="kw">for </span>Rgb<T> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Bgr<T>) { |
| <span class="kw">let </span>rgb = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>bgr = other.channels(); |
| rgb[<span class="number">0</span>] = bgr[<span class="number">2</span>]; |
| rgb[<span class="number">1</span>] = bgr[<span class="number">1</span>]; |
| rgb[<span class="number">2</span>] = bgr[<span class="number">0</span>]; |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive + <span class="lifetime">'static</span>> FromColor<LumaA<T>> <span class="kw">for </span>Rgb<T> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>LumaA<T>) { |
| <span class="kw">let </span>rgb = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>gray = other.channels()[<span class="number">0</span>]; |
| rgb[<span class="number">0</span>] = gray; |
| rgb[<span class="number">1</span>] = gray; |
| rgb[<span class="number">2</span>] = gray; |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive + <span class="lifetime">'static</span>> FromColor<Luma<T>> <span class="kw">for </span>Rgb<T> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, gray: <span class="kw-2">&</span>Luma<T>) { |
| <span class="kw">let </span>rgb = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>gray = gray.channels()[<span class="number">0</span>]; |
| rgb[<span class="number">0</span>] = gray; |
| rgb[<span class="number">1</span>] = gray; |
| rgb[<span class="number">2</span>] = gray; |
| } |
| } |
| |
| <span class="kw">impl </span>FromColor<Rgb<u16>> <span class="kw">for </span>Rgb<u8> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Rgb<u16>) { |
| <span class="kw">for </span>(c8, <span class="kw-2">&</span>c16) <span class="kw">in </span><span class="self">self</span>.channels_mut().iter_mut().zip(other.channels()) { |
| <span class="kw-2">*</span>c8 = downcast_channel(c16); |
| } |
| } |
| } |
| |
| <span class="kw">impl </span>FromColor<Rgb<u8>> <span class="kw">for </span>Rgb<u16> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Rgb<u8>) { |
| <span class="kw">for </span>(c8, <span class="kw-2">&</span>c16) <span class="kw">in </span><span class="self">self</span>.channels_mut().iter_mut().zip(other.channels()) { |
| <span class="kw-2">*</span>c8 = upcast_channel(c16); |
| } |
| } |
| } |
| |
| <span class="kw">impl </span>FromColor<LumaA<u8>> <span class="kw">for </span>Rgb<u16> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>LumaA<u8>) { |
| <span class="kw">let </span>la8 = other.channels(); |
| <span class="kw">let </span>gray = upcast_channel(la8[<span class="number">0</span>]); |
| <span class="kw">let </span>rgb = <span class="self">self</span>.channels_mut(); |
| rgb[<span class="number">0</span>] = gray; |
| rgb[<span class="number">1</span>] = gray; |
| rgb[<span class="number">2</span>] = gray; |
| } |
| } |
| |
| <span class="kw">impl </span>FromColor<Rgba<u8>> <span class="kw">for </span>Rgb<u16> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Rgba<u8>) { |
| <span class="kw">let </span>rgba = other.channels(); |
| <span class="kw">let </span>rgb = <span class="self">self</span>.channels_mut(); |
| rgb[<span class="number">0</span>] = upcast_channel(rgba[<span class="number">0</span>]); |
| rgb[<span class="number">1</span>] = upcast_channel(rgba[<span class="number">1</span>]); |
| rgb[<span class="number">2</span>] = upcast_channel(rgba[<span class="number">2</span>]); |
| } |
| } |
| |
| <span class="kw">impl </span>FromColor<Luma<u8>> <span class="kw">for </span>Rgb<u16> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Luma<u8>) { |
| <span class="kw">let </span>l8 = other.channels(); |
| <span class="kw">let </span>rgb = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>gray = upcast_channel(l8[<span class="number">0</span>]); |
| rgb[<span class="number">0</span>] = gray; |
| rgb[<span class="number">1</span>] = gray; |
| rgb[<span class="number">2</span>] = gray; |
| } |
| } |
| |
| <span class="kw">impl </span>FromColor<Bgr<u8>> <span class="kw">for </span>Rgb<u16> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Bgr<u8>) { |
| <span class="kw">let </span>bgr = other.channels(); |
| <span class="kw">let </span>rgb = <span class="self">self</span>.channels_mut(); |
| rgb[<span class="number">0</span>] = upcast_channel(bgr[<span class="number">2</span>]); |
| rgb[<span class="number">1</span>] = upcast_channel(bgr[<span class="number">1</span>]); |
| rgb[<span class="number">2</span>] = upcast_channel(bgr[<span class="number">0</span>]); |
| } |
| } |
| |
| <span class="kw">impl </span>FromColor<Bgra<u8>> <span class="kw">for </span>Rgb<u16> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Bgra<u8>) { |
| <span class="kw">let </span>bgra = other.channels(); |
| <span class="kw">let </span>rgb = <span class="self">self</span>.channels_mut(); |
| rgb[<span class="number">0</span>] = upcast_channel(bgra[<span class="number">2</span>]); |
| rgb[<span class="number">1</span>] = upcast_channel(bgra[<span class="number">1</span>]); |
| rgb[<span class="number">2</span>] = upcast_channel(bgra[<span class="number">0</span>]); |
| } |
| } |
| |
| |
| <span class="doccomment">/// `FromColor` for BGR |
| |
| </span><span class="kw">impl</span><T: Primitive + <span class="lifetime">'static</span>> FromColor<Rgba<T>> <span class="kw">for </span>Bgr<T> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Rgba<T>) { |
| <span class="kw">let </span>bgr = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>rgba = other.channels(); |
| bgr[<span class="number">0</span>] = rgba[<span class="number">2</span>]; |
| bgr[<span class="number">1</span>] = rgba[<span class="number">1</span>]; |
| bgr[<span class="number">2</span>] = rgba[<span class="number">0</span>]; |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive + <span class="lifetime">'static</span>> FromColor<Rgb<T>> <span class="kw">for </span>Bgr<T> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Rgb<T>) { |
| <span class="kw">let </span>bgr = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>rgb = other.channels(); |
| bgr[<span class="number">0</span>] = rgb[<span class="number">2</span>]; |
| bgr[<span class="number">1</span>] = rgb[<span class="number">1</span>]; |
| bgr[<span class="number">2</span>] = rgb[<span class="number">0</span>]; |
| } |
| } |
| |
| |
| <span class="kw">impl</span><T: Primitive + <span class="lifetime">'static</span>> FromColor<Bgra<T>> <span class="kw">for </span>Bgr<T> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Bgra<T>) { |
| <span class="kw">let </span>bgr = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>bgra = other.channels(); |
| bgr[<span class="number">0</span>] = bgra[<span class="number">0</span>]; |
| bgr[<span class="number">1</span>] = bgra[<span class="number">1</span>]; |
| bgr[<span class="number">2</span>] = bgra[<span class="number">2</span>]; |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive + <span class="lifetime">'static</span>> FromColor<LumaA<T>> <span class="kw">for </span>Bgr<T> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>LumaA<T>) { |
| <span class="kw">let </span>bgr = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>gray = other.channels()[<span class="number">0</span>]; |
| bgr[<span class="number">0</span>] = gray; |
| bgr[<span class="number">1</span>] = gray; |
| bgr[<span class="number">2</span>] = gray; |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive + <span class="lifetime">'static</span>> FromColor<Luma<T>> <span class="kw">for </span>Bgr<T> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, gray: <span class="kw-2">&</span>Luma<T>) { |
| <span class="kw">let </span>bgr = <span class="self">self</span>.channels_mut(); |
| <span class="kw">let </span>gray = gray.channels()[<span class="number">0</span>]; |
| bgr[<span class="number">0</span>] = gray; |
| bgr[<span class="number">1</span>] = gray; |
| bgr[<span class="number">2</span>] = gray; |
| } |
| } |
| |
| <span class="macro">macro_rules! </span>downcast_bit_depth_early { |
| (<span class="macro-nonterminal">$src</span>:ident, <span class="macro-nonterminal">$intermediate</span>:ident, <span class="macro-nonterminal">$dst</span>:ident) => { |
| <span class="kw">impl </span>FromColor<<span class="macro-nonterminal">$src</span><u16>> <span class="kw">for </span><span class="macro-nonterminal">$dst</span><u8> { |
| <span class="kw">fn </span>from_color(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span><span class="macro-nonterminal">$src</span><u16>) { |
| <span class="kw">let </span><span class="kw-2">mut </span>intermediate: <span class="macro-nonterminal">$intermediate</span><u8> = <span class="macro-nonterminal">$intermediate</span>([Zero::zero(); <<span class="macro-nonterminal">$intermediate</span><u8> <span class="kw">as </span>Pixel>::CHANNEL_COUNT <span class="kw">as </span>usize]); |
| intermediate.from_color(other); |
| <span class="self">self</span>.from_color(<span class="kw-2">&</span>intermediate); |
| } |
| } |
| }; |
| } |
| |
| |
| <span class="comment">// Downcasts |
| // LumaA |
| </span><span class="macro">downcast_bit_depth_early!</span>(Luma, Luma, LumaA); |
| <span class="macro">downcast_bit_depth_early!</span>(Rgb, Rgb, LumaA); |
| <span class="macro">downcast_bit_depth_early!</span>(Rgba, Rgba, LumaA); |
| <span class="comment">// Rgb |
| </span><span class="macro">downcast_bit_depth_early!</span>(Luma, Luma, Rgb); |
| <span class="macro">downcast_bit_depth_early!</span>(LumaA, LumaA, Rgb); |
| <span class="macro">downcast_bit_depth_early!</span>(Rgba, Rgba, Rgb); |
| <span class="comment">// Rgba |
| </span><span class="macro">downcast_bit_depth_early!</span>(Luma, Luma, Rgba); |
| <span class="macro">downcast_bit_depth_early!</span>(LumaA, LumaA, Rgba); |
| <span class="macro">downcast_bit_depth_early!</span>(Rgb, Rgb, Rgba); |
| <span class="comment">// Bgr |
| </span><span class="macro">downcast_bit_depth_early!</span>(Luma, Luma, Bgr); |
| <span class="macro">downcast_bit_depth_early!</span>(LumaA, LumaA, Bgr); |
| <span class="macro">downcast_bit_depth_early!</span>(Rgb, Rgb, Bgr); |
| <span class="macro">downcast_bit_depth_early!</span>(Rgba, Rgba, Bgr); |
| <span class="comment">// Bgra |
| </span><span class="macro">downcast_bit_depth_early!</span>(Luma, Luma, Bgra); |
| <span class="macro">downcast_bit_depth_early!</span>(LumaA, LumaA, Bgra); |
| <span class="macro">downcast_bit_depth_early!</span>(Rgb, Rgb, Bgra); |
| <span class="macro">downcast_bit_depth_early!</span>(Rgba, Rgba, Bgra); |
| |
| |
| <span class="doccomment">/// Blends a color inter another one |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">trait </span>Blend { |
| <span class="doccomment">/// Blends a color in-place. |
| </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="kw">impl</span><T: Primitive> Blend <span class="kw">for </span>LumaA<T> { |
| <span class="kw">fn </span>blend(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>LumaA<T>) { |
| <span class="kw">let </span>max_t = T::max_value(); |
| <span class="kw">let </span>max_t = max_t.to_f32().unwrap(); |
| <span class="kw">let </span>(bg_luma, bg_a) = (<span class="self">self</span>.<span class="number">0</span>[<span class="number">0</span>], <span class="self">self</span>.<span class="number">0</span>[<span class="number">1</span>]); |
| <span class="kw">let </span>(fg_luma, fg_a) = (other.<span class="number">0</span>[<span class="number">0</span>], other.<span class="number">0</span>[<span class="number">1</span>]); |
| |
| <span class="kw">let </span>(bg_luma, bg_a) = ( |
| bg_luma.to_f32().unwrap() / max_t, |
| bg_a.to_f32().unwrap() / max_t, |
| ); |
| <span class="kw">let </span>(fg_luma, fg_a) = ( |
| fg_luma.to_f32().unwrap() / max_t, |
| fg_a.to_f32().unwrap() / max_t, |
| ); |
| |
| <span class="kw">let </span>alpha_final = bg_a + fg_a - bg_a * fg_a; |
| <span class="kw">if </span>alpha_final == <span class="number">0.0 </span>{ |
| <span class="kw">return</span>; |
| }; |
| <span class="kw">let </span>bg_luma_a = bg_luma * bg_a; |
| <span class="kw">let </span>fg_luma_a = fg_luma * fg_a; |
| |
| <span class="kw">let </span>out_luma_a = fg_luma_a + bg_luma_a * (<span class="number">1.0 </span>- fg_a); |
| <span class="kw">let </span>out_luma = out_luma_a / alpha_final; |
| |
| <span class="kw-2">*</span><span class="self">self </span>= LumaA([ |
| NumCast::from(max_t * out_luma).unwrap(), |
| NumCast::from(max_t * alpha_final).unwrap(), |
| ]) |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive> Blend <span class="kw">for </span>Luma<T> { |
| <span class="kw">fn </span>blend(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Luma<T>) { |
| <span class="kw-2">*</span><span class="self">self </span>= <span class="kw-2">*</span>other |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive> Blend <span class="kw">for </span>Rgba<T> { |
| <span class="kw">fn </span>blend(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Rgba<T>) { |
| <span class="comment">// http://stackoverflow.com/questions/7438263/alpha-compositing-algorithm-blend-modes#answer-11163848 |
| |
| // First, as we don't know what type our pixel is, we have to convert to floats between 0.0 and 1.0 |
| </span><span class="kw">let </span>max_t = T::max_value(); |
| <span class="kw">let </span>max_t = max_t.to_f32().unwrap(); |
| <span class="kw">let </span>(bg_r, bg_g, bg_b, bg_a) = (<span class="self">self</span>.<span class="number">0</span>[<span class="number">0</span>], <span class="self">self</span>.<span class="number">0</span>[<span class="number">1</span>], <span class="self">self</span>.<span class="number">0</span>[<span class="number">2</span>], <span class="self">self</span>.<span class="number">0</span>[<span class="number">3</span>]); |
| <span class="kw">let </span>(fg_r, fg_g, fg_b, fg_a) = (other.<span class="number">0</span>[<span class="number">0</span>], other.<span class="number">0</span>[<span class="number">1</span>], other.<span class="number">0</span>[<span class="number">2</span>], other.<span class="number">0</span>[<span class="number">3</span>]); |
| <span class="kw">let </span>(bg_r, bg_g, bg_b, bg_a) = ( |
| bg_r.to_f32().unwrap() / max_t, |
| bg_g.to_f32().unwrap() / max_t, |
| bg_b.to_f32().unwrap() / max_t, |
| bg_a.to_f32().unwrap() / max_t, |
| ); |
| <span class="kw">let </span>(fg_r, fg_g, fg_b, fg_a) = ( |
| fg_r.to_f32().unwrap() / max_t, |
| fg_g.to_f32().unwrap() / max_t, |
| fg_b.to_f32().unwrap() / max_t, |
| fg_a.to_f32().unwrap() / max_t, |
| ); |
| |
| <span class="comment">// Work out what the final alpha level will be |
| </span><span class="kw">let </span>alpha_final = bg_a + fg_a - bg_a * fg_a; |
| <span class="kw">if </span>alpha_final == <span class="number">0.0 </span>{ |
| <span class="kw">return</span>; |
| }; |
| |
| <span class="comment">// We premultiply our channels by their alpha, as this makes it easier to calculate |
| </span><span class="kw">let </span>(bg_r_a, bg_g_a, bg_b_a) = (bg_r * bg_a, bg_g * bg_a, bg_b * bg_a); |
| <span class="kw">let </span>(fg_r_a, fg_g_a, fg_b_a) = (fg_r * fg_a, fg_g * fg_a, fg_b * fg_a); |
| |
| <span class="comment">// Standard formula for src-over alpha compositing |
| </span><span class="kw">let </span>(out_r_a, out_g_a, out_b_a) = ( |
| fg_r_a + bg_r_a * (<span class="number">1.0 </span>- fg_a), |
| fg_g_a + bg_g_a * (<span class="number">1.0 </span>- fg_a), |
| fg_b_a + bg_b_a * (<span class="number">1.0 </span>- fg_a), |
| ); |
| |
| <span class="comment">// Unmultiply the channels by our resultant alpha channel |
| </span><span class="kw">let </span>(out_r, out_g, out_b) = ( |
| out_r_a / alpha_final, |
| out_g_a / alpha_final, |
| out_b_a / alpha_final, |
| ); |
| |
| <span class="comment">// Cast back to our initial type on return |
| </span><span class="kw-2">*</span><span class="self">self </span>= Rgba([ |
| NumCast::from(max_t * out_r).unwrap(), |
| NumCast::from(max_t * out_g).unwrap(), |
| NumCast::from(max_t * out_b).unwrap(), |
| NumCast::from(max_t * alpha_final).unwrap(), |
| ]) |
| } |
| } |
| |
| |
| |
| <span class="kw">impl</span><T: Primitive> Blend <span class="kw">for </span>Bgra<T> { |
| <span class="kw">fn </span>blend(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Bgra<T>) { |
| <span class="comment">// http://stackoverflow.com/questions/7438263/alpha-compositing-algorithm-blend-modes#answer-11163848 |
| |
| // First, as we don't know what type our pixel is, we have to convert to floats between 0.0 and 1.0 |
| </span><span class="kw">let </span>max_t = T::max_value(); |
| <span class="kw">let </span>max_t = max_t.to_f32().unwrap(); |
| <span class="kw">let </span>(bg_r, bg_g, bg_b, bg_a) = (<span class="self">self</span>.<span class="number">0</span>[<span class="number">2</span>], <span class="self">self</span>.<span class="number">0</span>[<span class="number">1</span>], <span class="self">self</span>.<span class="number">0</span>[<span class="number">0</span>], <span class="self">self</span>.<span class="number">0</span>[<span class="number">3</span>]); |
| <span class="kw">let </span>(fg_r, fg_g, fg_b, fg_a) = (other.<span class="number">0</span>[<span class="number">2</span>], other.<span class="number">0</span>[<span class="number">1</span>], other.<span class="number">0</span>[<span class="number">0</span>], other.<span class="number">0</span>[<span class="number">3</span>]); |
| <span class="kw">let </span>(bg_r, bg_g, bg_b, bg_a) = ( |
| bg_r.to_f32().unwrap() / max_t, |
| bg_g.to_f32().unwrap() / max_t, |
| bg_b.to_f32().unwrap() / max_t, |
| bg_a.to_f32().unwrap() / max_t, |
| ); |
| <span class="kw">let </span>(fg_r, fg_g, fg_b, fg_a) = ( |
| fg_r.to_f32().unwrap() / max_t, |
| fg_g.to_f32().unwrap() / max_t, |
| fg_b.to_f32().unwrap() / max_t, |
| fg_a.to_f32().unwrap() / max_t, |
| ); |
| |
| <span class="comment">// Work out what the final alpha level will be |
| </span><span class="kw">let </span>alpha_final = bg_a + fg_a - bg_a * fg_a; |
| <span class="kw">if </span>alpha_final == <span class="number">0.0 </span>{ |
| <span class="kw">return</span>; |
| }; |
| |
| <span class="comment">// We premultiply our channels by their alpha, as this makes it easier to calculate |
| </span><span class="kw">let </span>(bg_r_a, bg_g_a, bg_b_a) = (bg_r * bg_a, bg_g * bg_a, bg_b * bg_a); |
| <span class="kw">let </span>(fg_r_a, fg_g_a, fg_b_a) = (fg_r * fg_a, fg_g * fg_a, fg_b * fg_a); |
| |
| <span class="comment">// Standard formula for src-over alpha compositing |
| </span><span class="kw">let </span>(out_r_a, out_g_a, out_b_a) = ( |
| fg_r_a + bg_r_a * (<span class="number">1.0 </span>- fg_a), |
| fg_g_a + bg_g_a * (<span class="number">1.0 </span>- fg_a), |
| fg_b_a + bg_b_a * (<span class="number">1.0 </span>- fg_a), |
| ); |
| |
| <span class="comment">// Unmultiply the channels by our resultant alpha channel |
| </span><span class="kw">let </span>(out_r, out_g, out_b) = ( |
| out_r_a / alpha_final, |
| out_g_a / alpha_final, |
| out_b_a / alpha_final, |
| ); |
| |
| <span class="comment">// Cast back to our initial type on return |
| </span><span class="kw-2">*</span><span class="self">self </span>= Bgra([ |
| NumCast::from(max_t * out_b).unwrap(), |
| NumCast::from(max_t * out_g).unwrap(), |
| NumCast::from(max_t * out_r).unwrap(), |
| NumCast::from(max_t * alpha_final).unwrap(), |
| ]) |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive> Blend <span class="kw">for </span>Rgb<T> { |
| <span class="kw">fn </span>blend(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Rgb<T>) { |
| <span class="kw-2">*</span><span class="self">self </span>= <span class="kw-2">*</span>other |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive> Blend <span class="kw">for </span>Bgr<T> { |
| <span class="kw">fn </span>blend(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span>Bgr<T>) { |
| <span class="kw-2">*</span><span class="self">self </span>= <span class="kw-2">*</span>other |
| } |
| } |
| |
| |
| <span class="doccomment">/// Invert a color |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">trait </span>Invert { |
| <span class="doccomment">/// Inverts a color in-place. |
| </span><span class="kw">fn </span>invert(<span class="kw-2">&mut </span><span class="self">self</span>); |
| } |
| |
| <span class="kw">impl</span><T: Primitive> Invert <span class="kw">for </span>LumaA<T> { |
| <span class="kw">fn </span>invert(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="kw">let </span>l = <span class="self">self</span>.<span class="number">0</span>; |
| <span class="kw">let </span>max = T::max_value(); |
| |
| <span class="kw-2">*</span><span class="self">self </span>= LumaA([max - l[<span class="number">0</span>], l[<span class="number">1</span>]]) |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive> Invert <span class="kw">for </span>Luma<T> { |
| <span class="kw">fn </span>invert(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="kw">let </span>l = <span class="self">self</span>.<span class="number">0</span>; |
| |
| <span class="kw">let </span>max = T::max_value(); |
| <span class="kw">let </span>l1 = max - l[<span class="number">0</span>]; |
| |
| <span class="kw-2">*</span><span class="self">self </span>= Luma([l1]) |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive> Invert <span class="kw">for </span>Rgba<T> { |
| <span class="kw">fn </span>invert(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="kw">let </span>rgba = <span class="self">self</span>.<span class="number">0</span>; |
| |
| <span class="kw">let </span>max = T::max_value(); |
| |
| <span class="kw-2">*</span><span class="self">self </span>= Rgba([max - rgba[<span class="number">0</span>], max - rgba[<span class="number">1</span>], max - rgba[<span class="number">2</span>], rgba[<span class="number">3</span>]]) |
| } |
| } |
| |
| |
| <span class="kw">impl</span><T: Primitive> Invert <span class="kw">for </span>Bgra<T> { |
| <span class="kw">fn </span>invert(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="kw">let </span>bgra = <span class="self">self</span>.<span class="number">0</span>; |
| |
| <span class="kw">let </span>max = T::max_value(); |
| |
| <span class="kw-2">*</span><span class="self">self </span>= Bgra([max - bgra[<span class="number">2</span>], max - bgra[<span class="number">1</span>], max - bgra[<span class="number">0</span>], bgra[<span class="number">3</span>]]) |
| } |
| } |
| |
| |
| <span class="kw">impl</span><T: Primitive> Invert <span class="kw">for </span>Rgb<T> { |
| <span class="kw">fn </span>invert(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="kw">let </span>rgb = <span class="self">self</span>.<span class="number">0</span>; |
| |
| <span class="kw">let </span>max = T::max_value(); |
| |
| <span class="kw">let </span>r1 = max - rgb[<span class="number">0</span>]; |
| <span class="kw">let </span>g1 = max - rgb[<span class="number">1</span>]; |
| <span class="kw">let </span>b1 = max - rgb[<span class="number">2</span>]; |
| |
| <span class="kw-2">*</span><span class="self">self </span>= Rgb([r1, g1, b1]) |
| } |
| } |
| |
| <span class="kw">impl</span><T: Primitive> Invert <span class="kw">for </span>Bgr<T> { |
| <span class="kw">fn </span>invert(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="kw">let </span>bgr = <span class="self">self</span>.<span class="number">0</span>; |
| |
| <span class="kw">let </span>max = T::max_value(); |
| |
| <span class="kw">let </span>r1 = max - bgr[<span class="number">2</span>]; |
| <span class="kw">let </span>g1 = max - bgr[<span class="number">1</span>]; |
| <span class="kw">let </span>b1 = max - bgr[<span class="number">0</span>]; |
| |
| <span class="kw-2">*</span><span class="self">self </span>= Bgr([b1, g1, r1]) |
| } |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>tests { |
| <span class="kw">use super</span>::{Bgr, Bgra, Luma, LumaA, Pixel, Rgb, Rgba}; |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_apply_with_alpha_rgba() { |
| <span class="kw">let </span><span class="kw-2">mut </span>rgba = Rgba([<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>]); |
| rgba.apply_with_alpha(|s| s, |<span class="kw">_</span>| <span class="number">0xFF</span>); |
| <span class="macro">assert_eq!</span>(rgba, Rgba([<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0xFF</span>])); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_apply_with_alpha_bgra() { |
| <span class="kw">let </span><span class="kw-2">mut </span>bgra = Bgra([<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>]); |
| bgra.apply_with_alpha(|s| s, |<span class="kw">_</span>| <span class="number">0xFF</span>); |
| <span class="macro">assert_eq!</span>(bgra, Bgra([<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0xFF</span>])); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_apply_with_alpha_rgb() { |
| <span class="kw">let </span><span class="kw-2">mut </span>rgb = Rgb([<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>]); |
| rgb.apply_with_alpha(|s| s, |<span class="kw">_</span>| <span class="macro">panic!</span>(<span class="string">"bug"</span>)); |
| <span class="macro">assert_eq!</span>(rgb, Rgb([<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>])); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_apply_with_alpha_bgr() { |
| <span class="kw">let </span><span class="kw-2">mut </span>bgr = Bgr([<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>]); |
| bgr.apply_with_alpha(|s| s, |<span class="kw">_</span>| <span class="macro">panic!</span>(<span class="string">"bug"</span>)); |
| <span class="macro">assert_eq!</span>(bgr, Bgr([<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>])); |
| } |
| |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_map_with_alpha_rgba() { |
| <span class="kw">let </span>rgba = Rgba([<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>]).map_with_alpha(|s| s, |<span class="kw">_</span>| <span class="number">0xFF</span>); |
| <span class="macro">assert_eq!</span>(rgba, Rgba([<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0xFF</span>])); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_map_with_alpha_rgb() { |
| <span class="kw">let </span>rgb = Rgb([<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>]).map_with_alpha(|s| s, |<span class="kw">_</span>| <span class="macro">panic!</span>(<span class="string">"bug"</span>)); |
| <span class="macro">assert_eq!</span>(rgb, Rgb([<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>])); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_map_with_alpha_bgr() { |
| <span class="kw">let </span>bgr = Bgr([<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>]).map_with_alpha(|s| s, |<span class="kw">_</span>| <span class="macro">panic!</span>(<span class="string">"bug"</span>)); |
| <span class="macro">assert_eq!</span>(bgr, Bgr([<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>])); |
| } |
| |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_map_with_alpha_bgra() { |
| <span class="kw">let </span>bgra = Bgra([<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>]).map_with_alpha(|s| s, |<span class="kw">_</span>| <span class="number">0xFF</span>); |
| <span class="macro">assert_eq!</span>(bgra, Bgra([<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0xFF</span>])); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_blend_luma_alpha() { |
| <span class="kw">let </span><span class="kw-2">ref mut </span>a = LumaA([<span class="number">255 </span><span class="kw">as </span>u8, <span class="number">255</span>]); |
| <span class="kw">let </span>b = LumaA([<span class="number">255 </span><span class="kw">as </span>u8, <span class="number">255</span>]); |
| a.blend(<span class="kw-2">&</span>b); |
| <span class="macro">assert_eq!</span>(a.<span class="number">0</span>[<span class="number">0</span>], <span class="number">255</span>); |
| <span class="macro">assert_eq!</span>(a.<span class="number">0</span>[<span class="number">1</span>], <span class="number">255</span>); |
| |
| <span class="kw">let </span><span class="kw-2">ref mut </span>a = LumaA([<span class="number">255 </span><span class="kw">as </span>u8, <span class="number">0</span>]); |
| <span class="kw">let </span>b = LumaA([<span class="number">255 </span><span class="kw">as </span>u8, <span class="number">255</span>]); |
| a.blend(<span class="kw-2">&</span>b); |
| <span class="macro">assert_eq!</span>(a.<span class="number">0</span>[<span class="number">0</span>], <span class="number">255</span>); |
| <span class="macro">assert_eq!</span>(a.<span class="number">0</span>[<span class="number">1</span>], <span class="number">255</span>); |
| |
| <span class="kw">let </span><span class="kw-2">ref mut </span>a = LumaA([<span class="number">255 </span><span class="kw">as </span>u8, <span class="number">255</span>]); |
| <span class="kw">let </span>b = LumaA([<span class="number">255 </span><span class="kw">as </span>u8, <span class="number">0</span>]); |
| a.blend(<span class="kw-2">&</span>b); |
| <span class="macro">assert_eq!</span>(a.<span class="number">0</span>[<span class="number">0</span>], <span class="number">255</span>); |
| <span class="macro">assert_eq!</span>(a.<span class="number">0</span>[<span class="number">1</span>], <span class="number">255</span>); |
| |
| <span class="kw">let </span><span class="kw-2">ref mut </span>a = LumaA([<span class="number">255 </span><span class="kw">as </span>u8, <span class="number">0</span>]); |
| <span class="kw">let </span>b = LumaA([<span class="number">255 </span><span class="kw">as </span>u8, <span class="number">0</span>]); |
| a.blend(<span class="kw-2">&</span>b); |
| <span class="macro">assert_eq!</span>(a.<span class="number">0</span>[<span class="number">0</span>], <span class="number">255</span>); |
| <span class="macro">assert_eq!</span>(a.<span class="number">0</span>[<span class="number">1</span>], <span class="number">0</span>); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_blend_rgba() { |
| <span class="kw">let </span><span class="kw-2">ref mut </span>a = Rgba([<span class="number">255 </span><span class="kw">as </span>u8, <span class="number">255</span>, <span class="number">255</span>, <span class="number">255</span>]); |
| <span class="kw">let </span>b = Rgba([<span class="number">255 </span><span class="kw">as </span>u8, <span class="number">255</span>, <span class="number">255</span>, <span class="number">255</span>]); |
| a.blend(<span class="kw-2">&</span>b); |
| <span class="macro">assert_eq!</span>(a.<span class="number">0</span>, [<span class="number">255</span>, <span class="number">255</span>, <span class="number">255</span>, <span class="number">255</span>]); |
| |
| <span class="kw">let </span><span class="kw-2">ref mut </span>a = Rgba([<span class="number">255 </span><span class="kw">as </span>u8, <span class="number">255</span>, <span class="number">255</span>, <span class="number">0</span>]); |
| <span class="kw">let </span>b = Rgba([<span class="number">255 </span><span class="kw">as </span>u8, <span class="number">255</span>, <span class="number">255</span>, <span class="number">255</span>]); |
| a.blend(<span class="kw-2">&</span>b); |
| <span class="macro">assert_eq!</span>(a.<span class="number">0</span>, [<span class="number">255</span>, <span class="number">255</span>, <span class="number">255</span>, <span class="number">255</span>]); |
| |
| <span class="kw">let </span><span class="kw-2">ref mut </span>a = Rgba([<span class="number">255 </span><span class="kw">as </span>u8, <span class="number">255</span>, <span class="number">255</span>, <span class="number">255</span>]); |
| <span class="kw">let </span>b = Rgba([<span class="number">255 </span><span class="kw">as </span>u8, <span class="number">255</span>, <span class="number">255</span>, <span class="number">0</span>]); |
| a.blend(<span class="kw-2">&</span>b); |
| <span class="macro">assert_eq!</span>(a.<span class="number">0</span>, [<span class="number">255</span>, <span class="number">255</span>, <span class="number">255</span>, <span class="number">255</span>]); |
| |
| <span class="kw">let </span><span class="kw-2">ref mut </span>a = Rgba([<span class="number">255 </span><span class="kw">as </span>u8, <span class="number">255</span>, <span class="number">255</span>, <span class="number">0</span>]); |
| <span class="kw">let </span>b = Rgba([<span class="number">255 </span><span class="kw">as </span>u8, <span class="number">255</span>, <span class="number">255</span>, <span class="number">0</span>]); |
| a.blend(<span class="kw-2">&</span>b); |
| <span class="macro">assert_eq!</span>(a.<span class="number">0</span>, [<span class="number">255</span>, <span class="number">255</span>, <span class="number">255</span>, <span class="number">0</span>]); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_apply_without_alpha_rgba() { |
| <span class="kw">let </span><span class="kw-2">mut </span>rgba = Rgba([<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>]); |
| rgba.apply_without_alpha(|s| s + <span class="number">1</span>); |
| <span class="macro">assert_eq!</span>(rgba, Rgba([<span class="number">1</span>, <span class="number">1</span>, <span class="number">1</span>, <span class="number">0</span>])); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_apply_without_alpha_bgra() { |
| <span class="kw">let </span><span class="kw-2">mut </span>bgra = Bgra([<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>]); |
| bgra.apply_without_alpha(|s| s + <span class="number">1</span>); |
| <span class="macro">assert_eq!</span>(bgra, Bgra([<span class="number">1</span>, <span class="number">1</span>, <span class="number">1</span>, <span class="number">0</span>])); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_apply_without_alpha_rgb() { |
| <span class="kw">let </span><span class="kw-2">mut </span>rgb = Rgb([<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>]); |
| rgb.apply_without_alpha(|s| s + <span class="number">1</span>); |
| <span class="macro">assert_eq!</span>(rgb, Rgb([<span class="number">1</span>, <span class="number">1</span>, <span class="number">1</span>])); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_apply_without_alpha_bgr() { |
| <span class="kw">let </span><span class="kw-2">mut </span>bgr = Bgr([<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>]); |
| bgr.apply_without_alpha(|s| s + <span class="number">1</span>); |
| <span class="macro">assert_eq!</span>(bgr, Bgr([<span class="number">1</span>, <span class="number">1</span>, <span class="number">1</span>])); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_map_without_alpha_rgba() { |
| <span class="kw">let </span>rgba = Rgba([<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>]).map_without_alpha(|s| s + <span class="number">1</span>); |
| <span class="macro">assert_eq!</span>(rgba, Rgba([<span class="number">1</span>, <span class="number">1</span>, <span class="number">1</span>, <span class="number">0</span>])); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_map_without_alpha_rgb() { |
| <span class="kw">let </span>rgb = Rgb([<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>]).map_without_alpha(|s| s + <span class="number">1</span>); |
| <span class="macro">assert_eq!</span>(rgb, Rgb([<span class="number">1</span>, <span class="number">1</span>, <span class="number">1</span>])); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_map_without_alpha_bgr() { |
| <span class="kw">let </span>bgr = Bgr([<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>]).map_without_alpha(|s| s + <span class="number">1</span>); |
| <span class="macro">assert_eq!</span>(bgr, Bgr([<span class="number">1</span>, <span class="number">1</span>, <span class="number">1</span>])); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_map_without_alpha_bgra() { |
| <span class="kw">let </span>bgra = Bgra([<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>]).map_without_alpha(|s| s + <span class="number">1</span>); |
| <span class="macro">assert_eq!</span>(bgra, Bgra([<span class="number">1</span>, <span class="number">1</span>, <span class="number">1</span>, <span class="number">0</span>])); |
| } |
| |
| <span class="macro">macro_rules! </span>test_lossless_conversion { |
| (<span class="macro-nonterminal">$a</span>:ty, <span class="macro-nonterminal">$b</span>:ty, <span class="macro-nonterminal">$c</span>:ty) => { |
| <span class="kw">let </span>a: <span class="macro-nonterminal">$a </span>= [<<span class="macro-nonterminal">$a </span><span class="kw">as </span>Pixel>::Subpixel::max_value() >> <span class="number">2</span>; <<span class="macro-nonterminal">$a </span><span class="kw">as </span>Pixel>::CHANNEL_COUNT <span class="kw">as </span>usize].into(); |
| <span class="kw">let </span>b: <span class="macro-nonterminal">$b </span>= a.into_color(); |
| <span class="kw">let </span>c: <span class="macro-nonterminal">$c </span>= b.into_color(); |
| <span class="macro">assert_eq!</span>(a.channels(), c.channels()); |
| }; |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_lossless_conversions() { |
| <span class="kw">use </span><span class="kw">super</span>::IntoColor; |
| |
| <span class="macro">test_lossless_conversion!</span>(Bgr<u8>, Rgba<u8>, Bgr<u8>); |
| <span class="macro">test_lossless_conversion!</span>(Bgra<u8>, Rgba<u8>, Bgra<u8>); |
| <span class="macro">test_lossless_conversion!</span>(Luma<u8>, Luma<u16>, Luma<u8>); |
| <span class="macro">test_lossless_conversion!</span>(LumaA<u8>, LumaA<u16>, LumaA<u8>); |
| <span class="macro">test_lossless_conversion!</span>(Rgb<u8>, Rgb<u16>, Rgb<u8>); |
| <span class="macro">test_lossless_conversion!</span>(Rgba<u8>, Rgba<u16>, Rgba<u8>); |
| } |
| } |
| </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> |
