2d.gradient.radial.cone.shape1.html (1547B)
1 <!DOCTYPE html> 2 <!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. --> 3 <meta charset="UTF-8"> 4 <title>OffscreenCanvas test: 2d.gradient.radial.cone.shape1</title> 5 <script src="/resources/testharness.js"></script> 6 <script src="/resources/testharnessreport.js"></script> 7 <script src="/html/canvas/resources/canvas-tests.js"></script> 8 9 <h1>2d.gradient.radial.cone.shape1</h1> 10 <p class="desc"></p> 11 12 13 <script> 14 var t = async_test(""); 15 var t_pass = t.done.bind(t); 16 var t_fail = t.step_func(function(reason) { 17 throw reason; 18 }); 19 t.step(function() { 20 21 var canvas = new OffscreenCanvas(100, 50); 22 var ctx = canvas.getContext('2d'); 23 24 var tol = 1; // tolerance to avoid antialiasing artifacts 25 26 ctx.fillStyle = '#0f0'; 27 ctx.fillRect(0, 0, 100, 50); 28 29 ctx.fillStyle = '#f00'; 30 ctx.beginPath(); 31 ctx.moveTo(30+tol, 40); 32 ctx.lineTo(110, -20+tol); 33 ctx.lineTo(110, 100-tol); 34 ctx.fill(); 35 36 var g = ctx.createRadialGradient(30+10*5/2, 40, 10*3/2, 30+10*15/4, 40, 10*9/4); 37 g.addColorStop(0, '#0f0'); 38 g.addColorStop(1, '#0f0'); 39 ctx.fillStyle = g; 40 ctx.fillRect(0, 0, 100, 50); 41 42 _assertPixel(canvas, 1,1, 0,255,0,255); 43 _assertPixel(canvas, 50,1, 0,255,0,255); 44 _assertPixel(canvas, 98,1, 0,255,0,255); 45 _assertPixel(canvas, 1,25, 0,255,0,255); 46 _assertPixel(canvas, 50,25, 0,255,0,255); 47 _assertPixelApprox(canvas, 98,25, 0,255,0,255, 1); 48 _assertPixel(canvas, 1,48, 0,255,0,255); 49 _assertPixelApprox(canvas, 50,48, 0,255,0,255, 1); 50 _assertPixel(canvas, 98,48, 0,255,0,255); 51 t.done(); 52 53 }); 54 </script>