2d.line.width.transformed.html (2073B)
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.line.width.transformed</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.line.width.transformed</h1> 10 <p class="desc">Line stroke widths are affected by scale transformations</p> 11 12 13 <script> 14 var t = async_test("Line stroke widths are affected by scale transformations"); 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 ctx.fillStyle = '#0f0'; 25 ctx.fillRect(0, 0, 100, 50); 26 27 ctx.lineWidth = 4; 28 // Draw a green line over a red box, to check the line is not too small 29 ctx.fillStyle = '#f00'; 30 ctx.strokeStyle = '#0f0'; 31 ctx.fillRect(15, 15, 20, 20); 32 ctx.save(); 33 ctx.scale(5, 1); 34 ctx.beginPath(); 35 ctx.moveTo(5, 15); 36 ctx.lineTo(5, 35); 37 ctx.stroke(); 38 ctx.restore(); 39 40 // Draw a green box over a red line, to check the line is not too large 41 ctx.fillStyle = '#0f0'; 42 ctx.strokeStyle = '#f00'; 43 ctx.save(); 44 ctx.scale(-5, 1); 45 ctx.beginPath(); 46 ctx.moveTo(-15, 15); 47 ctx.lineTo(-15, 35); 48 ctx.stroke(); 49 ctx.restore(); 50 ctx.fillRect(65, 15, 20, 20); 51 52 _assertPixel(canvas, 14,25, 0,255,0,255); 53 _assertPixel(canvas, 15,25, 0,255,0,255); 54 _assertPixel(canvas, 16,25, 0,255,0,255); 55 _assertPixel(canvas, 25,25, 0,255,0,255); 56 _assertPixel(canvas, 34,25, 0,255,0,255); 57 _assertPixel(canvas, 35,25, 0,255,0,255); 58 _assertPixel(canvas, 36,25, 0,255,0,255); 59 60 _assertPixel(canvas, 64,25, 0,255,0,255); 61 _assertPixel(canvas, 65,25, 0,255,0,255); 62 _assertPixel(canvas, 66,25, 0,255,0,255); 63 _assertPixel(canvas, 75,25, 0,255,0,255); 64 _assertPixel(canvas, 84,25, 0,255,0,255); 65 _assertPixel(canvas, 85,25, 0,255,0,255); 66 _assertPixel(canvas, 86,25, 0,255,0,255); 67 t.done(); 68 69 }); 70 </script>