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diff --git a/testing/web-platform/tests/html/canvas/offscreen/layers/2d.layer.globalCompositeOperation.html b/testing/web-platform/tests/html/canvas/offscreen/layers/2d.layer.globalCompositeOperation.html
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+++ b/testing/web-platform/tests/html/canvas/offscreen/layers/2d.layer.globalCompositeOperation.html
@@ -0,0 +1,961 @@
+<!DOCTYPE html>
+<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
+<link rel="match" href="2d.layer.globalCompositeOperation-expected.html">
+<title>Canvas test: 2d.layer.globalCompositeOperation</title>
+<h1 style="font-size: 20px;">2d.layer.globalCompositeOperation</h1>
+<p class="desc">Checks that layers work with all globalCompositeOperation values.</p>
+
+<div style="display: grid; grid-gap: 4px;
+ grid-template-columns: repeat(7, max-content);
+ font-size: 13px; text-align: center;">
+<span>
+ <div>source-over</div>
+ <canvas id="canvas0" width="90" height="90" style="outline: 1px solid">
+ <p class="fallback">FAIL (fallback content)</p>
+ </canvas>
+ <script type="module">
+ const canvas = new OffscreenCanvas(90, 90);
+ const ctx = canvas.getContext('2d');
+
+ ctx.translate(50, 50);
+ ctx.scale(2, 2);
+ ctx.rotate(Math.PI);
+ ctx.translate(-25, -25);
+
+ ctx.fillStyle = 'rgba(0, 0, 255, 0.8)';
+ ctx.fillRect(15, 15, 25, 25);
+
+ ctx.globalAlpha = 0.75;
+ ctx.globalCompositeOperation = 'source-over';
+ ctx.shadowOffsetX = 7;
+ ctx.shadowOffsetY = 7;
+ ctx.shadowColor = 'rgba(255, 165, 0, 0.5)';
+
+ ctx.beginLayer();
+
+ ctx.fillStyle = 'rgba(204, 0, 0, 1)';
+ ctx.fillRect(10, 25, 25, 20);
+ ctx.fillStyle = 'rgba(0, 204, 0, 1)';
+ ctx.fillRect(25, 10, 20, 25);
+
+ ctx.endLayer();
+
+ const outputCanvas = document.getElementById("canvas0");
+ const outputCtx = outputCanvas.getContext('2d');
+ outputCtx.drawImage(canvas, 0, 0);
+ </script>
+</span>
+
+<span>
+ <div>source-in</div>
+ <canvas id="canvas1" width="90" height="90" style="outline: 1px solid">
+ <p class="fallback">FAIL (fallback content)</p>
+ </canvas>
+ <script type="module">
+ const canvas = new OffscreenCanvas(90, 90);
+ const ctx = canvas.getContext('2d');
+
+ ctx.translate(50, 50);
+ ctx.scale(2, 2);
+ ctx.rotate(Math.PI);
+ ctx.translate(-25, -25);
+
+ ctx.fillStyle = 'rgba(0, 0, 255, 0.8)';
+ ctx.fillRect(15, 15, 25, 25);
+
+ ctx.globalAlpha = 0.75;
+ ctx.globalCompositeOperation = 'source-in';
+ ctx.shadowOffsetX = 7;
+ ctx.shadowOffsetY = 7;
+ ctx.shadowColor = 'rgba(255, 165, 0, 0.5)';
+
+ ctx.beginLayer();
+
+ ctx.fillStyle = 'rgba(204, 0, 0, 1)';
+ ctx.fillRect(10, 25, 25, 20);
+ ctx.fillStyle = 'rgba(0, 204, 0, 1)';
+ ctx.fillRect(25, 10, 20, 25);
+
+ ctx.endLayer();
+
+ const outputCanvas = document.getElementById("canvas1");
+ const outputCtx = outputCanvas.getContext('2d');
+ outputCtx.drawImage(canvas, 0, 0);
+ </script>
+</span>
+
+<span>
+ <div>source-atop</div>
+ <canvas id="canvas2" width="90" height="90" style="outline: 1px solid">
+ <p class="fallback">FAIL (fallback content)</p>
+ </canvas>
+ <script type="module">
+ const canvas = new OffscreenCanvas(90, 90);
+ const ctx = canvas.getContext('2d');
+
+ ctx.translate(50, 50);
+ ctx.scale(2, 2);
+ ctx.rotate(Math.PI);
+ ctx.translate(-25, -25);
+
+ ctx.fillStyle = 'rgba(0, 0, 255, 0.8)';
+ ctx.fillRect(15, 15, 25, 25);
+
+ ctx.globalAlpha = 0.75;
+ ctx.globalCompositeOperation = 'source-atop';
+ ctx.shadowOffsetX = 7;
+ ctx.shadowOffsetY = 7;
+ ctx.shadowColor = 'rgba(255, 165, 0, 0.5)';
+
+ ctx.beginLayer();
+
+ ctx.fillStyle = 'rgba(204, 0, 0, 1)';
+ ctx.fillRect(10, 25, 25, 20);
+ ctx.fillStyle = 'rgba(0, 204, 0, 1)';
+ ctx.fillRect(25, 10, 20, 25);
+
+ ctx.endLayer();
+
+ const outputCanvas = document.getElementById("canvas2");
+ const outputCtx = outputCanvas.getContext('2d');
+ outputCtx.drawImage(canvas, 0, 0);
+ </script>
+</span>
+
+<span>
+ <div>destination-over</div>
+ <canvas id="canvas3" width="90" height="90" style="outline: 1px solid">
+ <p class="fallback">FAIL (fallback content)</p>
+ </canvas>
+ <script type="module">
+ const canvas = new OffscreenCanvas(90, 90);
+ const ctx = canvas.getContext('2d');
+
+ ctx.translate(50, 50);
+ ctx.scale(2, 2);
+ ctx.rotate(Math.PI);
+ ctx.translate(-25, -25);
+
+ ctx.fillStyle = 'rgba(0, 0, 255, 0.8)';
+ ctx.fillRect(15, 15, 25, 25);
+
+ ctx.globalAlpha = 0.75;
+ ctx.globalCompositeOperation = 'destination-over';
+ ctx.shadowOffsetX = 7;
+ ctx.shadowOffsetY = 7;
+ ctx.shadowColor = 'rgba(255, 165, 0, 0.5)';
+
+ ctx.beginLayer();
+
+ ctx.fillStyle = 'rgba(204, 0, 0, 1)';
+ ctx.fillRect(10, 25, 25, 20);
+ ctx.fillStyle = 'rgba(0, 204, 0, 1)';
+ ctx.fillRect(25, 10, 20, 25);
+
+ ctx.endLayer();
+
+ const outputCanvas = document.getElementById("canvas3");
+ const outputCtx = outputCanvas.getContext('2d');
+ outputCtx.drawImage(canvas, 0, 0);
+ </script>
+</span>
+
+<span>
+ <div>destination-in</div>
+ <canvas id="canvas4" width="90" height="90" style="outline: 1px solid">
+ <p class="fallback">FAIL (fallback content)</p>
+ </canvas>
+ <script type="module">
+ const canvas = new OffscreenCanvas(90, 90);
+ const ctx = canvas.getContext('2d');
+
+ ctx.translate(50, 50);
+ ctx.scale(2, 2);
+ ctx.rotate(Math.PI);
+ ctx.translate(-25, -25);
+
+ ctx.fillStyle = 'rgba(0, 0, 255, 0.8)';
+ ctx.fillRect(15, 15, 25, 25);
+
+ ctx.globalAlpha = 0.75;
+ ctx.globalCompositeOperation = 'destination-in';
+ ctx.shadowOffsetX = 7;
+ ctx.shadowOffsetY = 7;
+ ctx.shadowColor = 'rgba(255, 165, 0, 0.5)';
+
+ ctx.beginLayer();
+
+ ctx.fillStyle = 'rgba(204, 0, 0, 1)';
+ ctx.fillRect(10, 25, 25, 20);
+ ctx.fillStyle = 'rgba(0, 204, 0, 1)';
+ ctx.fillRect(25, 10, 20, 25);
+
+ ctx.endLayer();
+
+ const outputCanvas = document.getElementById("canvas4");
+ const outputCtx = outputCanvas.getContext('2d');
+ outputCtx.drawImage(canvas, 0, 0);
+ </script>
+</span>
+
+<span>
+ <div>destination-out</div>
+ <canvas id="canvas5" width="90" height="90" style="outline: 1px solid">
+ <p class="fallback">FAIL (fallback content)</p>
+ </canvas>
+ <script type="module">
+ const canvas = new OffscreenCanvas(90, 90);
+ const ctx = canvas.getContext('2d');
+
+ ctx.translate(50, 50);
+ ctx.scale(2, 2);
+ ctx.rotate(Math.PI);
+ ctx.translate(-25, -25);
+
+ ctx.fillStyle = 'rgba(0, 0, 255, 0.8)';
+ ctx.fillRect(15, 15, 25, 25);
+
+ ctx.globalAlpha = 0.75;
+ ctx.globalCompositeOperation = 'destination-out';
+ ctx.shadowOffsetX = 7;
+ ctx.shadowOffsetY = 7;
+ ctx.shadowColor = 'rgba(255, 165, 0, 0.5)';
+
+ ctx.beginLayer();
+
+ ctx.fillStyle = 'rgba(204, 0, 0, 1)';
+ ctx.fillRect(10, 25, 25, 20);
+ ctx.fillStyle = 'rgba(0, 204, 0, 1)';
+ ctx.fillRect(25, 10, 20, 25);
+
+ ctx.endLayer();
+
+ const outputCanvas = document.getElementById("canvas5");
+ const outputCtx = outputCanvas.getContext('2d');
+ outputCtx.drawImage(canvas, 0, 0);
+ </script>
+</span>
+
+<span>
+ <div>destination-atop</div>
+ <canvas id="canvas6" width="90" height="90" style="outline: 1px solid">
+ <p class="fallback">FAIL (fallback content)</p>
+ </canvas>
+ <script type="module">
+ const canvas = new OffscreenCanvas(90, 90);
+ const ctx = canvas.getContext('2d');
+
+ ctx.translate(50, 50);
+ ctx.scale(2, 2);
+ ctx.rotate(Math.PI);
+ ctx.translate(-25, -25);
+
+ ctx.fillStyle = 'rgba(0, 0, 255, 0.8)';
+ ctx.fillRect(15, 15, 25, 25);
+
+ ctx.globalAlpha = 0.75;
+ ctx.globalCompositeOperation = 'destination-atop';
+ ctx.shadowOffsetX = 7;
+ ctx.shadowOffsetY = 7;
+ ctx.shadowColor = 'rgba(255, 165, 0, 0.5)';
+
+ ctx.beginLayer();
+
+ ctx.fillStyle = 'rgba(204, 0, 0, 1)';
+ ctx.fillRect(10, 25, 25, 20);
+ ctx.fillStyle = 'rgba(0, 204, 0, 1)';
+ ctx.fillRect(25, 10, 20, 25);
+
+ ctx.endLayer();
+
+ const outputCanvas = document.getElementById("canvas6");
+ const outputCtx = outputCanvas.getContext('2d');
+ outputCtx.drawImage(canvas, 0, 0);
+ </script>
+</span>
+
+<span>
+ <div>lighter</div>
+ <canvas id="canvas7" width="90" height="90" style="outline: 1px solid">
+ <p class="fallback">FAIL (fallback content)</p>
+ </canvas>
+ <script type="module">
+ const canvas = new OffscreenCanvas(90, 90);
+ const ctx = canvas.getContext('2d');
+
+ ctx.translate(50, 50);
+ ctx.scale(2, 2);
+ ctx.rotate(Math.PI);
+ ctx.translate(-25, -25);
+
+ ctx.fillStyle = 'rgba(0, 0, 255, 0.8)';
+ ctx.fillRect(15, 15, 25, 25);
+
+ ctx.globalAlpha = 0.75;
+ ctx.globalCompositeOperation = 'lighter';
+ ctx.shadowOffsetX = 7;
+ ctx.shadowOffsetY = 7;
+ ctx.shadowColor = 'rgba(255, 165, 0, 0.5)';
+
+ ctx.beginLayer();
+
+ ctx.fillStyle = 'rgba(204, 0, 0, 1)';
+ ctx.fillRect(10, 25, 25, 20);
+ ctx.fillStyle = 'rgba(0, 204, 0, 1)';
+ ctx.fillRect(25, 10, 20, 25);
+
+ ctx.endLayer();
+
+ const outputCanvas = document.getElementById("canvas7");
+ const outputCtx = outputCanvas.getContext('2d');
+ outputCtx.drawImage(canvas, 0, 0);
+ </script>
+</span>
+
+<span>
+ <div>copy</div>
+ <canvas id="canvas8" width="90" height="90" style="outline: 1px solid">
+ <p class="fallback">FAIL (fallback content)</p>
+ </canvas>
+ <script type="module">
+ const canvas = new OffscreenCanvas(90, 90);
+ const ctx = canvas.getContext('2d');
+
+ ctx.translate(50, 50);
+ ctx.scale(2, 2);
+ ctx.rotate(Math.PI);
+ ctx.translate(-25, -25);
+
+ ctx.fillStyle = 'rgba(0, 0, 255, 0.8)';
+ ctx.fillRect(15, 15, 25, 25);
+
+ ctx.globalAlpha = 0.75;
+ ctx.globalCompositeOperation = 'copy';
+ ctx.shadowOffsetX = 7;
+ ctx.shadowOffsetY = 7;
+ ctx.shadowColor = 'rgba(255, 165, 0, 0.5)';
+
+ ctx.beginLayer();
+
+ ctx.fillStyle = 'rgba(204, 0, 0, 1)';
+ ctx.fillRect(10, 25, 25, 20);
+ ctx.fillStyle = 'rgba(0, 204, 0, 1)';
+ ctx.fillRect(25, 10, 20, 25);
+
+ ctx.endLayer();
+
+ const outputCanvas = document.getElementById("canvas8");
+ const outputCtx = outputCanvas.getContext('2d');
+ outputCtx.drawImage(canvas, 0, 0);
+ </script>
+</span>
+
+<span>
+ <div>xor</div>
+ <canvas id="canvas9" width="90" height="90" style="outline: 1px solid">
+ <p class="fallback">FAIL (fallback content)</p>
+ </canvas>
+ <script type="module">
+ const canvas = new OffscreenCanvas(90, 90);
+ const ctx = canvas.getContext('2d');
+
+ ctx.translate(50, 50);
+ ctx.scale(2, 2);
+ ctx.rotate(Math.PI);
+ ctx.translate(-25, -25);
+
+ ctx.fillStyle = 'rgba(0, 0, 255, 0.8)';
+ ctx.fillRect(15, 15, 25, 25);
+
+ ctx.globalAlpha = 0.75;
+ ctx.globalCompositeOperation = 'xor';
+ ctx.shadowOffsetX = 7;
+ ctx.shadowOffsetY = 7;
+ ctx.shadowColor = 'rgba(255, 165, 0, 0.5)';
+
+ ctx.beginLayer();
+
+ ctx.fillStyle = 'rgba(204, 0, 0, 1)';
+ ctx.fillRect(10, 25, 25, 20);
+ ctx.fillStyle = 'rgba(0, 204, 0, 1)';
+ ctx.fillRect(25, 10, 20, 25);
+
+ ctx.endLayer();
+
+ const outputCanvas = document.getElementById("canvas9");
+ const outputCtx = outputCanvas.getContext('2d');
+ outputCtx.drawImage(canvas, 0, 0);
+ </script>
+</span>
+
+<span>
+ <div>multiply</div>
+ <canvas id="canvas10" width="90" height="90" style="outline: 1px solid">
+ <p class="fallback">FAIL (fallback content)</p>
+ </canvas>
+ <script type="module">
+ const canvas = new OffscreenCanvas(90, 90);
+ const ctx = canvas.getContext('2d');
+
+ ctx.translate(50, 50);
+ ctx.scale(2, 2);
+ ctx.rotate(Math.PI);
+ ctx.translate(-25, -25);
+
+ ctx.fillStyle = 'rgba(0, 0, 255, 0.8)';
+ ctx.fillRect(15, 15, 25, 25);
+
+ ctx.globalAlpha = 0.75;
+ ctx.globalCompositeOperation = 'multiply';
+ ctx.shadowOffsetX = 7;
+ ctx.shadowOffsetY = 7;
+ ctx.shadowColor = 'rgba(255, 165, 0, 0.5)';
+
+ ctx.beginLayer();
+
+ ctx.fillStyle = 'rgba(204, 0, 0, 1)';
+ ctx.fillRect(10, 25, 25, 20);
+ ctx.fillStyle = 'rgba(0, 204, 0, 1)';
+ ctx.fillRect(25, 10, 20, 25);
+
+ ctx.endLayer();
+
+ const outputCanvas = document.getElementById("canvas10");
+ const outputCtx = outputCanvas.getContext('2d');
+ outputCtx.drawImage(canvas, 0, 0);
+ </script>
+</span>
+
+<span>
+ <div>screen</div>
+ <canvas id="canvas11" width="90" height="90" style="outline: 1px solid">
+ <p class="fallback">FAIL (fallback content)</p>
+ </canvas>
+ <script type="module">
+ const canvas = new OffscreenCanvas(90, 90);
+ const ctx = canvas.getContext('2d');
+
+ ctx.translate(50, 50);
+ ctx.scale(2, 2);
+ ctx.rotate(Math.PI);
+ ctx.translate(-25, -25);
+
+ ctx.fillStyle = 'rgba(0, 0, 255, 0.8)';
+ ctx.fillRect(15, 15, 25, 25);
+
+ ctx.globalAlpha = 0.75;
+ ctx.globalCompositeOperation = 'screen';
+ ctx.shadowOffsetX = 7;
+ ctx.shadowOffsetY = 7;
+ ctx.shadowColor = 'rgba(255, 165, 0, 0.5)';
+
+ ctx.beginLayer();
+
+ ctx.fillStyle = 'rgba(204, 0, 0, 1)';
+ ctx.fillRect(10, 25, 25, 20);
+ ctx.fillStyle = 'rgba(0, 204, 0, 1)';
+ ctx.fillRect(25, 10, 20, 25);
+
+ ctx.endLayer();
+
+ const outputCanvas = document.getElementById("canvas11");
+ const outputCtx = outputCanvas.getContext('2d');
+ outputCtx.drawImage(canvas, 0, 0);
+ </script>
+</span>
+
+<span>
+ <div>overlay</div>
+ <canvas id="canvas12" width="90" height="90" style="outline: 1px solid">
+ <p class="fallback">FAIL (fallback content)</p>
+ </canvas>
+ <script type="module">
+ const canvas = new OffscreenCanvas(90, 90);
+ const ctx = canvas.getContext('2d');
+
+ ctx.translate(50, 50);
+ ctx.scale(2, 2);
+ ctx.rotate(Math.PI);
+ ctx.translate(-25, -25);
+
+ ctx.fillStyle = 'rgba(0, 0, 255, 0.8)';
+ ctx.fillRect(15, 15, 25, 25);
+
+ ctx.globalAlpha = 0.75;
+ ctx.globalCompositeOperation = 'overlay';
+ ctx.shadowOffsetX = 7;
+ ctx.shadowOffsetY = 7;
+ ctx.shadowColor = 'rgba(255, 165, 0, 0.5)';
+
+ ctx.beginLayer();
+
+ ctx.fillStyle = 'rgba(204, 0, 0, 1)';
+ ctx.fillRect(10, 25, 25, 20);
+ ctx.fillStyle = 'rgba(0, 204, 0, 1)';
+ ctx.fillRect(25, 10, 20, 25);
+
+ ctx.endLayer();
+
+ const outputCanvas = document.getElementById("canvas12");
+ const outputCtx = outputCanvas.getContext('2d');
+ outputCtx.drawImage(canvas, 0, 0);
+ </script>
+</span>
+
+<span>
+ <div>darken</div>
+ <canvas id="canvas13" width="90" height="90" style="outline: 1px solid">
+ <p class="fallback">FAIL (fallback content)</p>
+ </canvas>
+ <script type="module">
+ const canvas = new OffscreenCanvas(90, 90);
+ const ctx = canvas.getContext('2d');
+
+ ctx.translate(50, 50);
+ ctx.scale(2, 2);
+ ctx.rotate(Math.PI);
+ ctx.translate(-25, -25);
+
+ ctx.fillStyle = 'rgba(0, 0, 255, 0.8)';
+ ctx.fillRect(15, 15, 25, 25);
+
+ ctx.globalAlpha = 0.75;
+ ctx.globalCompositeOperation = 'darken';
+ ctx.shadowOffsetX = 7;
+ ctx.shadowOffsetY = 7;
+ ctx.shadowColor = 'rgba(255, 165, 0, 0.5)';
+
+ ctx.beginLayer();
+
+ ctx.fillStyle = 'rgba(204, 0, 0, 1)';
+ ctx.fillRect(10, 25, 25, 20);
+ ctx.fillStyle = 'rgba(0, 204, 0, 1)';
+ ctx.fillRect(25, 10, 20, 25);
+
+ ctx.endLayer();
+
+ const outputCanvas = document.getElementById("canvas13");
+ const outputCtx = outputCanvas.getContext('2d');
+ outputCtx.drawImage(canvas, 0, 0);
+ </script>
+</span>
+
+<span>
+ <div>lighten</div>
+ <canvas id="canvas14" width="90" height="90" style="outline: 1px solid">
+ <p class="fallback">FAIL (fallback content)</p>
+ </canvas>
+ <script type="module">
+ const canvas = new OffscreenCanvas(90, 90);
+ const ctx = canvas.getContext('2d');
+
+ ctx.translate(50, 50);
+ ctx.scale(2, 2);
+ ctx.rotate(Math.PI);
+ ctx.translate(-25, -25);
+
+ ctx.fillStyle = 'rgba(0, 0, 255, 0.8)';
+ ctx.fillRect(15, 15, 25, 25);
+
+ ctx.globalAlpha = 0.75;
+ ctx.globalCompositeOperation = 'lighten';
+ ctx.shadowOffsetX = 7;
+ ctx.shadowOffsetY = 7;
+ ctx.shadowColor = 'rgba(255, 165, 0, 0.5)';
+
+ ctx.beginLayer();
+
+ ctx.fillStyle = 'rgba(204, 0, 0, 1)';
+ ctx.fillRect(10, 25, 25, 20);
+ ctx.fillStyle = 'rgba(0, 204, 0, 1)';
+ ctx.fillRect(25, 10, 20, 25);
+
+ ctx.endLayer();
+
+ const outputCanvas = document.getElementById("canvas14");
+ const outputCtx = outputCanvas.getContext('2d');
+ outputCtx.drawImage(canvas, 0, 0);
+ </script>
+</span>
+
+<span>
+ <div>color-dodge</div>
+ <canvas id="canvas15" width="90" height="90" style="outline: 1px solid">
+ <p class="fallback">FAIL (fallback content)</p>
+ </canvas>
+ <script type="module">
+ const canvas = new OffscreenCanvas(90, 90);
+ const ctx = canvas.getContext('2d');
+
+ ctx.translate(50, 50);
+ ctx.scale(2, 2);
+ ctx.rotate(Math.PI);
+ ctx.translate(-25, -25);
+
+ ctx.fillStyle = 'rgba(0, 0, 255, 0.8)';
+ ctx.fillRect(15, 15, 25, 25);
+
+ ctx.globalAlpha = 0.75;
+ ctx.globalCompositeOperation = 'color-dodge';
+ ctx.shadowOffsetX = 7;
+ ctx.shadowOffsetY = 7;
+ ctx.shadowColor = 'rgba(255, 165, 0, 0.5)';
+
+ ctx.beginLayer();
+
+ ctx.fillStyle = 'rgba(204, 0, 0, 1)';
+ ctx.fillRect(10, 25, 25, 20);
+ ctx.fillStyle = 'rgba(0, 204, 0, 1)';
+ ctx.fillRect(25, 10, 20, 25);
+
+ ctx.endLayer();
+
+ const outputCanvas = document.getElementById("canvas15");
+ const outputCtx = outputCanvas.getContext('2d');
+ outputCtx.drawImage(canvas, 0, 0);
+ </script>
+</span>
+
+<span>
+ <div>color-burn</div>
+ <canvas id="canvas16" width="90" height="90" style="outline: 1px solid">
+ <p class="fallback">FAIL (fallback content)</p>
+ </canvas>
+ <script type="module">
+ const canvas = new OffscreenCanvas(90, 90);
+ const ctx = canvas.getContext('2d');
+
+ ctx.translate(50, 50);
+ ctx.scale(2, 2);
+ ctx.rotate(Math.PI);
+ ctx.translate(-25, -25);
+
+ ctx.fillStyle = 'rgba(0, 0, 255, 0.8)';
+ ctx.fillRect(15, 15, 25, 25);
+
+ ctx.globalAlpha = 0.75;
+ ctx.globalCompositeOperation = 'color-burn';
+ ctx.shadowOffsetX = 7;
+ ctx.shadowOffsetY = 7;
+ ctx.shadowColor = 'rgba(255, 165, 0, 0.5)';
+
+ ctx.beginLayer();
+
+ ctx.fillStyle = 'rgba(204, 0, 0, 1)';
+ ctx.fillRect(10, 25, 25, 20);
+ ctx.fillStyle = 'rgba(0, 204, 0, 1)';
+ ctx.fillRect(25, 10, 20, 25);
+
+ ctx.endLayer();
+
+ const outputCanvas = document.getElementById("canvas16");
+ const outputCtx = outputCanvas.getContext('2d');
+ outputCtx.drawImage(canvas, 0, 0);
+ </script>
+</span>
+
+<span>
+ <div>hard-light</div>
+ <canvas id="canvas17" width="90" height="90" style="outline: 1px solid">
+ <p class="fallback">FAIL (fallback content)</p>
+ </canvas>
+ <script type="module">
+ const canvas = new OffscreenCanvas(90, 90);
+ const ctx = canvas.getContext('2d');
+
+ ctx.translate(50, 50);
+ ctx.scale(2, 2);
+ ctx.rotate(Math.PI);
+ ctx.translate(-25, -25);
+
+ ctx.fillStyle = 'rgba(0, 0, 255, 0.8)';
+ ctx.fillRect(15, 15, 25, 25);
+
+ ctx.globalAlpha = 0.75;
+ ctx.globalCompositeOperation = 'hard-light';
+ ctx.shadowOffsetX = 7;
+ ctx.shadowOffsetY = 7;
+ ctx.shadowColor = 'rgba(255, 165, 0, 0.5)';
+
+ ctx.beginLayer();
+
+ ctx.fillStyle = 'rgba(204, 0, 0, 1)';
+ ctx.fillRect(10, 25, 25, 20);
+ ctx.fillStyle = 'rgba(0, 204, 0, 1)';
+ ctx.fillRect(25, 10, 20, 25);
+
+ ctx.endLayer();
+
+ const outputCanvas = document.getElementById("canvas17");
+ const outputCtx = outputCanvas.getContext('2d');
+ outputCtx.drawImage(canvas, 0, 0);
+ </script>
+</span>
+
+<span>
+ <div>soft-light</div>
+ <canvas id="canvas18" width="90" height="90" style="outline: 1px solid">
+ <p class="fallback">FAIL (fallback content)</p>
+ </canvas>
+ <script type="module">
+ const canvas = new OffscreenCanvas(90, 90);
+ const ctx = canvas.getContext('2d');
+
+ ctx.translate(50, 50);
+ ctx.scale(2, 2);
+ ctx.rotate(Math.PI);
+ ctx.translate(-25, -25);
+
+ ctx.fillStyle = 'rgba(0, 0, 255, 0.8)';
+ ctx.fillRect(15, 15, 25, 25);
+
+ ctx.globalAlpha = 0.75;
+ ctx.globalCompositeOperation = 'soft-light';
+ ctx.shadowOffsetX = 7;
+ ctx.shadowOffsetY = 7;
+ ctx.shadowColor = 'rgba(255, 165, 0, 0.5)';
+
+ ctx.beginLayer();
+
+ ctx.fillStyle = 'rgba(204, 0, 0, 1)';
+ ctx.fillRect(10, 25, 25, 20);
+ ctx.fillStyle = 'rgba(0, 204, 0, 1)';
+ ctx.fillRect(25, 10, 20, 25);
+
+ ctx.endLayer();
+
+ const outputCanvas = document.getElementById("canvas18");
+ const outputCtx = outputCanvas.getContext('2d');
+ outputCtx.drawImage(canvas, 0, 0);
+ </script>
+</span>
+
+<span>
+ <div>difference</div>
+ <canvas id="canvas19" width="90" height="90" style="outline: 1px solid">
+ <p class="fallback">FAIL (fallback content)</p>
+ </canvas>
+ <script type="module">
+ const canvas = new OffscreenCanvas(90, 90);
+ const ctx = canvas.getContext('2d');
+
+ ctx.translate(50, 50);
+ ctx.scale(2, 2);
+ ctx.rotate(Math.PI);
+ ctx.translate(-25, -25);
+
+ ctx.fillStyle = 'rgba(0, 0, 255, 0.8)';
+ ctx.fillRect(15, 15, 25, 25);
+
+ ctx.globalAlpha = 0.75;
+ ctx.globalCompositeOperation = 'difference';
+ ctx.shadowOffsetX = 7;
+ ctx.shadowOffsetY = 7;
+ ctx.shadowColor = 'rgba(255, 165, 0, 0.5)';
+
+ ctx.beginLayer();
+
+ ctx.fillStyle = 'rgba(204, 0, 0, 1)';
+ ctx.fillRect(10, 25, 25, 20);
+ ctx.fillStyle = 'rgba(0, 204, 0, 1)';
+ ctx.fillRect(25, 10, 20, 25);
+
+ ctx.endLayer();
+
+ const outputCanvas = document.getElementById("canvas19");
+ const outputCtx = outputCanvas.getContext('2d');
+ outputCtx.drawImage(canvas, 0, 0);
+ </script>
+</span>
+
+<span>
+ <div>exclusion</div>
+ <canvas id="canvas20" width="90" height="90" style="outline: 1px solid">
+ <p class="fallback">FAIL (fallback content)</p>
+ </canvas>
+ <script type="module">
+ const canvas = new OffscreenCanvas(90, 90);
+ const ctx = canvas.getContext('2d');
+
+ ctx.translate(50, 50);
+ ctx.scale(2, 2);
+ ctx.rotate(Math.PI);
+ ctx.translate(-25, -25);
+
+ ctx.fillStyle = 'rgba(0, 0, 255, 0.8)';
+ ctx.fillRect(15, 15, 25, 25);
+
+ ctx.globalAlpha = 0.75;
+ ctx.globalCompositeOperation = 'exclusion';
+ ctx.shadowOffsetX = 7;
+ ctx.shadowOffsetY = 7;
+ ctx.shadowColor = 'rgba(255, 165, 0, 0.5)';
+
+ ctx.beginLayer();
+
+ ctx.fillStyle = 'rgba(204, 0, 0, 1)';
+ ctx.fillRect(10, 25, 25, 20);
+ ctx.fillStyle = 'rgba(0, 204, 0, 1)';
+ ctx.fillRect(25, 10, 20, 25);
+
+ ctx.endLayer();
+
+ const outputCanvas = document.getElementById("canvas20");
+ const outputCtx = outputCanvas.getContext('2d');
+ outputCtx.drawImage(canvas, 0, 0);
+ </script>
+</span>
+
+<span>
+ <div>hue</div>
+ <canvas id="canvas21" width="90" height="90" style="outline: 1px solid">
+ <p class="fallback">FAIL (fallback content)</p>
+ </canvas>
+ <script type="module">
+ const canvas = new OffscreenCanvas(90, 90);
+ const ctx = canvas.getContext('2d');
+
+ ctx.translate(50, 50);
+ ctx.scale(2, 2);
+ ctx.rotate(Math.PI);
+ ctx.translate(-25, -25);
+
+ ctx.fillStyle = 'rgba(0, 0, 255, 0.8)';
+ ctx.fillRect(15, 15, 25, 25);
+
+ ctx.globalAlpha = 0.75;
+ ctx.globalCompositeOperation = 'hue';
+ ctx.shadowOffsetX = 7;
+ ctx.shadowOffsetY = 7;
+ ctx.shadowColor = 'rgba(255, 165, 0, 0.5)';
+
+ ctx.beginLayer();
+
+ ctx.fillStyle = 'rgba(204, 0, 0, 1)';
+ ctx.fillRect(10, 25, 25, 20);
+ ctx.fillStyle = 'rgba(0, 204, 0, 1)';
+ ctx.fillRect(25, 10, 20, 25);
+
+ ctx.endLayer();
+
+ const outputCanvas = document.getElementById("canvas21");
+ const outputCtx = outputCanvas.getContext('2d');
+ outputCtx.drawImage(canvas, 0, 0);
+ </script>
+</span>
+
+<span>
+ <div>saturation</div>
+ <canvas id="canvas22" width="90" height="90" style="outline: 1px solid">
+ <p class="fallback">FAIL (fallback content)</p>
+ </canvas>
+ <script type="module">
+ const canvas = new OffscreenCanvas(90, 90);
+ const ctx = canvas.getContext('2d');
+
+ ctx.translate(50, 50);
+ ctx.scale(2, 2);
+ ctx.rotate(Math.PI);
+ ctx.translate(-25, -25);
+
+ ctx.fillStyle = 'rgba(0, 0, 255, 0.8)';
+ ctx.fillRect(15, 15, 25, 25);
+
+ ctx.globalAlpha = 0.75;
+ ctx.globalCompositeOperation = 'saturation';
+ ctx.shadowOffsetX = 7;
+ ctx.shadowOffsetY = 7;
+ ctx.shadowColor = 'rgba(255, 165, 0, 0.5)';
+
+ ctx.beginLayer();
+
+ ctx.fillStyle = 'rgba(204, 0, 0, 1)';
+ ctx.fillRect(10, 25, 25, 20);
+ ctx.fillStyle = 'rgba(0, 204, 0, 1)';
+ ctx.fillRect(25, 10, 20, 25);
+
+ ctx.endLayer();
+
+ const outputCanvas = document.getElementById("canvas22");
+ const outputCtx = outputCanvas.getContext('2d');
+ outputCtx.drawImage(canvas, 0, 0);
+ </script>
+</span>
+
+<span>
+ <div>color</div>
+ <canvas id="canvas23" width="90" height="90" style="outline: 1px solid">
+ <p class="fallback">FAIL (fallback content)</p>
+ </canvas>
+ <script type="module">
+ const canvas = new OffscreenCanvas(90, 90);
+ const ctx = canvas.getContext('2d');
+
+ ctx.translate(50, 50);
+ ctx.scale(2, 2);
+ ctx.rotate(Math.PI);
+ ctx.translate(-25, -25);
+
+ ctx.fillStyle = 'rgba(0, 0, 255, 0.8)';
+ ctx.fillRect(15, 15, 25, 25);
+
+ ctx.globalAlpha = 0.75;
+ ctx.globalCompositeOperation = 'color';
+ ctx.shadowOffsetX = 7;
+ ctx.shadowOffsetY = 7;
+ ctx.shadowColor = 'rgba(255, 165, 0, 0.5)';
+
+ ctx.beginLayer();
+
+ ctx.fillStyle = 'rgba(204, 0, 0, 1)';
+ ctx.fillRect(10, 25, 25, 20);
+ ctx.fillStyle = 'rgba(0, 204, 0, 1)';
+ ctx.fillRect(25, 10, 20, 25);
+
+ ctx.endLayer();
+
+ const outputCanvas = document.getElementById("canvas23");
+ const outputCtx = outputCanvas.getContext('2d');
+ outputCtx.drawImage(canvas, 0, 0);
+ </script>
+</span>
+
+<span>
+ <div>luminosity</div>
+ <canvas id="canvas24" width="90" height="90" style="outline: 1px solid">
+ <p class="fallback">FAIL (fallback content)</p>
+ </canvas>
+ <script type="module">
+ const canvas = new OffscreenCanvas(90, 90);
+ const ctx = canvas.getContext('2d');
+
+ ctx.translate(50, 50);
+ ctx.scale(2, 2);
+ ctx.rotate(Math.PI);
+ ctx.translate(-25, -25);
+
+ ctx.fillStyle = 'rgba(0, 0, 255, 0.8)';
+ ctx.fillRect(15, 15, 25, 25);
+
+ ctx.globalAlpha = 0.75;
+ ctx.globalCompositeOperation = 'luminosity';
+ ctx.shadowOffsetX = 7;
+ ctx.shadowOffsetY = 7;
+ ctx.shadowColor = 'rgba(255, 165, 0, 0.5)';
+
+ ctx.beginLayer();
+
+ ctx.fillStyle = 'rgba(204, 0, 0, 1)';
+ ctx.fillRect(10, 25, 25, 20);
+ ctx.fillStyle = 'rgba(0, 204, 0, 1)';
+ ctx.fillRect(25, 10, 20, 25);
+
+ ctx.endLayer();
+
+ const outputCanvas = document.getElementById("canvas24");
+ const outputCtx = outputCanvas.getContext('2d');
+ outputCtx.drawImage(canvas, 0, 0);
+ </script>
+</span>
+
+</div>