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diff --git a/files/nl/web/api/canvasrenderingcontext2d/globalcompositeoperation/index.html b/files/nl/web/api/canvasrenderingcontext2d/globalcompositeoperation/index.html new file mode 100644 index 0000000000..40813af9a2 --- /dev/null +++ b/files/nl/web/api/canvasrenderingcontext2d/globalcompositeoperation/index.html @@ -0,0 +1,219 @@ +--- +title: CanvasRenderingContext2D.globalCompositeOperation +slug: Web/API/CanvasRenderingContext2D/globalCompositeOperation +tags: + - API + - Blending + - Canvas + - CanvasRenderingContext2D + - Compositie + - Onderdeel + - Referentie +translation_of: Web/API/CanvasRenderingContext2D/globalCompositeOperation +--- +<div>{{APIRef}}</div> + +<p>De <code><strong>CanvasRenderingContext2D</strong></code><strong><code>.globalCompositeOperation</code></strong>onderdeel van de Canvas 2D API verandert het type van renderen van nieuwe figuren. Hierbij is type een string die de nieuwe rendermodus geeft.</p> + +<p>Bekijk ook het hoofdstuk <a href="/en-US/docs/Web/API/Canvas_API/Tutorial/Compositing">Compositing</a> in de <a href="/en-US/docs/Web/API/Canvas_API/Tutorial">Canvas Tutorial</a>.</p> + +<h2 id="Syntax">Syntax</h2> + +<pre class="syntaxbox"><var><em>ctx</em>.globalCompositeOperation = type;</var></pre> + +<h3 id="Types">Types</h3> + +<p>{{EmbedLiveSample("Compositing_example", 750, 7300, "" ,"Web/API/Canvas_API/Tutorial/Compositing/Example")}}</p> + +<h2 id="Examples">Examples</h2> + +<h3 id="Using_the_globalAlpha_property" name="Using_the_globalAlpha_property"><code>globalCompositeOperation</code> gebruiken</h3> + +<p>Dit is maar een klein stukje code die de <code>globalCompositeOperation</code> property gebruikt om twee rechthoeken te tekenen die elkaar erbuiten houden waar ze overlappen.</p> + +<h4 id="HTML">HTML</h4> + +<pre class="brush: html"><canvas id="canvas"></canvas> +</pre> + +<h4 id="JavaScript">JavaScript</h4> + +<pre class="brush: js; highlight[4]">var canvas = document.getElementById('canvas'); +var ctx = canvas.getContext('2d'); + +ctx.globalCompositeOperation = 'xor'; + +ctx.fillStyle = 'blue'; +ctx.fillRect(10, 10, 100, 100); + +ctx.fillStyle = 'red'; +ctx.fillRect(50, 50, 100, 100); +</pre> + +<p>Bewerk de code hieronder en zie de veranderingen:</p> + +<div class="hidden"> +<h6 id="Playable_code" name="Playable_code">Speelcode</h6> + +<pre class="brush: html"><canvas id="canvas" width="400" height="200" class="playable-canvas"></canvas> +<div class="playable-buttons"> + <input id="edit" type="button" value="Edit" /> + <input id="reset" type="button" value="Reset" /> +</div> +<textarea id="code" class="playable-code" style="height:120px;"> +ctx.globalCompositeOperation = 'xor'; + +ctx.fillStyle = 'blue'; +ctx.fillRect(10, 10, 100, 100); + +ctx.fillStyle = 'red'; +ctx.fillRect(50, 50, 100, 100);</textarea> +</pre> + +<pre class="brush: js">var canvas = document.getElementById('canvas'); +var ctx = canvas.getContext('2d'); +var textarea = document.getElementById('code'); +var reset = document.getElementById('reset'); +var edit = document.getElementById('edit'); +var code = textarea.value; + +function drawCanvas() { + ctx.clearRect(0, 0, canvas.width, canvas.height); + eval(textarea.value); +} + +reset.addEventListener('click', function() { + textarea.value = code; + drawCanvas(); +}); + +edit.addEventListener('click', function() { + textarea.focus(); +}) + +textarea.addEventListener('input', drawCanvas); +window.addEventListener('load', drawCanvas); +</pre> +</div> + +<p>{{ EmbedLiveSample('Playable_code', 700, 380) }}</p> + +<h2 id="Specificaties">Specificaties</h2> + +<table class="standard-table"> + <tbody> + <tr> + <th scope="col">Specificatie</th> + <th scope="col">Status</th> + <th scope="col">Comment</th> + </tr> + <tr> + <td>{{SpecName('HTML WHATWG', "scripting.html#dom-context-2d-globalcompositeoperation", "CanvasRenderingContext2D.globalCompositeOperation")}}</td> + <td>{{Spec2('HTML WHATWG')}}</td> + <td> </td> + </tr> + <tr> + <td>{{SpecName('Compositing')}}</td> + <td>{{Spec2('Compositing')}}</td> + <td> </td> + </tr> + </tbody> +</table> + +<h2 id="Browserondersteuning">Browserondersteuning</h2> + +<p>{{CompatibilityTable}}</p> + +<div id="compat-desktop"> +<table class="compat-table"> + <tbody> + <tr> + <th>Feature</th> + <th>Chrome</th> + <th>Edge</th> + <th>Firefox (Gecko)</th> + <th>Internet Explorer</th> + <th>Opera</th> + <th>Safari</th> + </tr> + <tr> + <td>Standaard</td> + <td>{{CompatVersionUnknown}}</td> + <td>{{CompatVersionUnknown}}</td> + <td>{{CompatVersionUnknown}}</td> + <td>{{CompatVersionUnknown}}</td> + <td>{{CompatVersionUnknown}}</td> + <td>{{CompatVersionUnknown}}</td> + </tr> + <tr> + <td>Blendmodus</td> + <td>{{CompatVersionUnknown}}</td> + <td>{{CompatVersionUnknown}}</td> + <td>{{ CompatGeckoDesktop("20") }}</td> + <td>{{CompatUnknown}}</td> + <td>{{CompatUnknown}}</td> + <td>{{CompatVersionUnknown}}</td> + </tr> + </tbody> +</table> +</div> + +<div id="compat-mobile"> +<table class="compat-table"> + <tbody> + <tr> + <th>Feature</th> + <th>Android</th> + <th>Android Webview</th> + <th>Edge</th> + <th>Firefox Mobile (Gecko)</th> + <th>IE Mobile</th> + <th>Opera Mobile</th> + <th>Safari Mobile</th> + <th>Chrome for Android</th> + </tr> + <tr> + <td>Standaard</td> + <td>{{CompatVersionUnknown}}</td> + <td>{{CompatVersionUnknown}}</td> + <td>{{CompatVersionUnknown}}</td> + <td>{{CompatVersionUnknown}}</td> + <td>{{CompatVersionUnknown}}</td> + <td>{{CompatVersionUnknown}}</td> + <td>{{CompatVersionUnknown}}</td> + <td>{{CompatVersionUnknown}}</td> + </tr> + <tr> + <td>Blendmodus</td> + <td>{{CompatUnknown}}</td> + <td>{{CompatUnknown}}</td> + <td>{{CompatVersionUnknown}}</td> + <td>{{ CompatGeckoMobile("20") }}</td> + <td>{{CompatUnknown}}</td> + <td>{{CompatUnknown}}</td> + <td>{{CompatUnknown}}</td> + <td>{{CompatUnknown}}</td> + </tr> + </tbody> +</table> +</div> + +<h2 id="WebKitBlink-specifieke_opmerkingen">WebKit/Blink-specifieke opmerkingen</h2> + +<ul> + <li>In WebKit- and Blink-gebaseerde Browsers, is een niet-standaard en afgewezen functie <code>ctx.setCompositeOperation()</code> gebruikt voor deze operatie.</li> + <li>Ondersteuning "plus-darker" en "darker" zijn verwijderd in Chrome 48. Ontwikkelaars zoeken een vervanging die "darken" moet gebruiken.</li> +</ul> + +<h2 id="Gecko-specifieke_opmerkingen">Gecko-specifieke opmerkingen</h2> + +<ul> + <li>Een vroege Canvas-specificatie draft heeft de waarde "darker", maar Firefox verwijderde ondersteuning voor "darker" in versie 4 ({{bug(571532)}}). Bekijk ook <a href="http://dropshado.ws/post/77229081704/firefox-doesnt-support-canvas-composite-darker">deze blogpost</a> die de <code>difference</code> value aanraad om een gelijk effect als "darker" te maken.</li> +</ul> + +<h2 id="Bekijk_ook">Bekijk ook</h2> + +<ul> + <li>De interface die het definieert: {{domxref("CanvasRenderingContext2D")}}</li> + <li>{{domxref("CanvasRenderingContext2D.globalAlpha")}}</li> +</ul> |