当前位置: 首页 > Web前端 > HTML

Fabric.js使用纯色来遮挡画布(前景色)

时间:2023-03-29 11:01:55 HTML

杩欑瘒鏂囩珷浠嬬粛鐐硅禐+鍏虫敞+鏀惰棌=瀛﹀埌浜嗗鏋滀綘鎯虫妸鐢诲竷涓殑鎵€鏈夊唴瀹归兘閬綇锛屼綘浼氱敤浠€涔堟柟娉曞憿锛熺┖鐧界敾甯冨唴瀹癸紵鐩存帴鍘绘帀canvas鍏冪礌锛熷湪鐢诲竷涓婂垱寤轰竴涓柊鍏冪礌锛熷鏋滀綘鐨勯」鐩娇鐢ㄤ簡fabric.js锛屼綘鍙互鐩存帴浣跨敤fabric.js鎻愪緵鐨勬柟娉曡鐩朿anvas锛屼娇鐢ㄩ潪甯哥畝鍗曘€傝缃甤anvas.overlayColor鐨勫墠鏅壊overlayColorfabric.js鎻愪緵浜嗕竴涓缃畂verlay棰滆壊鐨勫睘鎬э紝涔熷彲浠ヨ鏄缃墠鏅壊銆俹verlayColor:String|fabric.PatternOverlay鐢诲竷瀹炰緥鐨勯鑹层€傚簲璇ラ€氳繃fabric.StaticCanvas#setOverlayColor璁剧疆浣跨敤杩欎釜灞炴€у湪鐢诲竷鐨勯《灞傚彔鍔犱竴灞傞鑹诧紝鍙互瑕嗙洊鐢诲竷涓殑鎵€鏈夎儗鏅拰鍏冪礌銆傚彲浠ヨ鐩栭粯璁よ儗鏅壊姣斿鎴戣缃皝闈㈤鑹蹭负绮夌孩鑹?/瑕嗙洊棰滆壊backgroundColor:'red'//鑳屾櫙棰滆壊})濡傛灉涓婇潰鐨勪唬鐮佹病鏈夊皢overlayColor璁剧疆涓虹矇绾㈣壊锛岀敾甯冨簲璇ユ湁绾㈣壊鑳屾櫙銆傚彲浠ヨ鐩栬儗鏅浘鐗?canvasid="canvasBox">鍒濆鍖栫敾甯冨悗锛屾垜閫氳繃setBackgroundImage鏂规硶璁剧疆鐢诲竷鐨勮儗鏅浘鐗囥€備粠浠g爜缂栧啓椤哄簭鏉ョ湅锛岃儗鏅浘鏄渶鍚庤缃殑锛屼絾鏄笉浼氳鐩杘verlayColor銆傚彲鍙犲姞鍏冪礌濡傛灉鐩磋涓婅儗鏅浘鍦ㄥ簳灞傦紝overlayColor涓嶈兘瓒婄骇锛岄偅涔堟垜浠彲浠ュ皾璇曞垱寤轰竴涓厓绱狅紝灏嗗厓绱犺缃埌椤跺眰鏉ユ祴璇曟晥鏋溿€?canvasid="canvasBox">浣跨敤bringToFront()鏂规硶灏嗙煩褰㈢殑灞傜骇鎷夊埌鏈€椤跺眰锛屼絾涓嶈兘瓒呭嚭overlayColor銆傚幓闄verlay鍦ㄤ竴浜涘簲鐢ㄥ満鏅紙姣斿娓告垙锛変腑锛岄渶瑕佹彁鍓嶅姞杞絚anvas锛屼絾鏄綋鏌愪釜鏃跺埢鐢ㄦ埛娌℃湁鏉冮檺鏌ョ湅canvas鐨勫唴瀹规椂锛屽彲浠ヤ娇鐢╫verlayColor鏉ヨ鐩栧竼甯冦€傛垜浣跨敤setTimeout鏉ユā鎷熷湪婊¤冻鏌愪簺涓氬姟鏉′欢鍚庡垹闄ゅ彔鍔犲眰鐨勬晥鏋溿€?canvasid="canvasBox">璁剧疆canvas.overlayColor涓簄ull鍚庯紝overlay浼氳绉婚櫎锛屼篃鍙互璁剧疆涓洪€忔槑鎴栫┖瀛楃涓层€傜Щ闄ゅ彔鍔犲眰鍚庯紝闇€瑕佸埛鏂扮敾甯冿紝鎴戜娇鐢╟anvas.renderAll()銆傛洿鐏垫椿鐨勬柟娉晄etOverlayColor闄や簡鍦ㄥ垱寤虹敾甯冩椂璁剧疆overlayColor澶栵紝杩樺彲浠ヤ娇鐢╯etOverlayColor()鏂规硶鍦ㄦ煇涓€鐐硅缃敾甯冮伄缃╅鑹层€俿etOverlayColor(overlayColor,callback)鎺ユ敹2涓弬鏁帮細overlayColor锛氳缃墠鏅壊鎴栧浘妗坈allback锛氬洖璋冨嚱鏁帮紙璁剧疆鍚庡埛鏂扮敾甯冿級浣犳病鐪嬮敊锛宻etOverlayColor鍙互璁剧疆鍥炬锛屼紶鍏ヤ竴寮犲浘鐗囧嵆鍙€備负浜嗘紨绀烘柟渚匡紝鎴戝皢鐢诲竷鐨勫楂樿缃负800*800銆傝缃函鑹?/鐪佺暐閮ㄥ垎浠g爜canvas.setOverlayColor('yellowgreen',//璁剧疆棰滆壊canvas.renderAll.bind(canvas)//鍒锋柊鐢诲竷)濡傛灉浣犳兂鍦ㄥ洖璋冨嚱鏁颁腑鍋氬叾浠栦簨鎯咃紝浣犲彲浠ヨ繖鏍峰啓//鐪佺暐涓€浜涗唬鐮乧anvas.setOverlayColor('pink',function(){console.log('done')canvas.renderAll()})setimage//鐪佺暐涓€浜涗唬鐮乧anvas.setOverlayColor({source:'../../images/bg4.png'},canvas.renderAll.bind(canvas))绗竴涓弬鏁版槸object锛屽湪source涓紶鍏ュ浘鐗囪矾寰勫嵆鍙€傚湪涓婇潰鐨勪緥瀛愪腑锛屽浘鍍忎細鑷姩閲嶅娓叉煋锛岃鐩栨暣涓敾甯冦€傛澶栵紝杩樺彲浠ヨ皟鏁翠笉鍚岀殑灞炴€у弬鏁般€?/鐪佺暐閮ㄥ垎浠g爜canvas.setOverlayColor({source:'../../images/bg4.png',repeat:'no-repeat',//涓嶉噸澶峯ffsetX:200,//Offsetinthex-axisdirectionoffsetY:100//y杞存柟鍚戠殑鍋忕Щ閲弣,canvas.renderAll.bind(canvas))娉ㄦ剰鏈変竴鐐归渶瑕佹敞鎰忥紝overlayColor鐨勪綔鐢ㄦ槸鍦ㄤ笂闈㈣缃竴灞傚彔鍔犻鑹茬敾甯冪殑椤堕儴锛屼絾鐢诲竷鐨勬搷浣滀笉鍙楅檺鍒躲€備粛鐒舵槸涓婇潰鐨勭煩褰㈢ず渚嬨€備粠鍥句腑鍙互鐪嬪嚭榧犳爣鎸囬拡鐨勫彉鍖栵紝鍙互鍒ゆ柇鐢诲竷涓婄殑鐭╁舰杩樻槸鍙互鎿嶄綔鐨勩€備唬鐮佷粨搴撯瓙Fabric.js浣跨敤绾壊瑕嗙洊鐢诲竷猸怓abric.jssetOverlayColor鎺ㄨ崘闃呰馃憤銆奆abric.js 浠庡叆闂ㄥ埌_ _ _ _銆嬸煈嶃€奆abric.js 涓婂垝绾裤€佷腑鍒掔嚎锛堝垹闄ょ嚎锛夈€佷笅鍒掔嚎銆嬸煈嶃€奆abric.js 婵€娲昏緭鍏ユ銆嬸煈嶃€奆abric.js 杈撳嚭绮剧畝鐨凧SON銆嬸煈嶃€奆abric.js 鍔ㄦ€佽缃瓧鍙峰ぇ灏忋€嬸煈嶃€奆abric.js IText 鎵嬪姩璁剧疆鏂滀綋銆嬬偣璧?鍏虫敞+鏀惰棌=瀛︿範浠g爜搴?/p>

最新推荐
猜你喜欢