2d.drawImage.negativedir.html (1516B)
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.drawImage.negativedir</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.drawImage.negativedir</h1> 10 <p class="desc">Negative dimensions do not affect the direction of the image</p> 11 12 13 <script> 14 promise_test(async t => { 15 16 var canvas = new OffscreenCanvas(100, 50); 17 var ctx = canvas.getContext('2d'); 18 19 ctx.fillStyle = '#f00'; 20 ctx.fillRect(0, 0, 100, 50); 21 const response = await fetch('/images/ggrr-256x256.png'); 22 const blob = await response.blob(); 23 const bitmap = await createImageBitmap(blob); 24 ctx.drawImage(bitmap, 0, 178, 50, -100, 0, 0, 50, 100); 25 ctx.drawImage(bitmap, 0, 78, 50, 100, 50, 100, 50, -100); 26 _assertPixelApprox(canvas, 1,1, 0,255,0,255, 2); 27 _assertPixelApprox(canvas, 1,48, 0,255,0,255, 2); 28 _assertPixelApprox(canvas, 98,1, 0,255,0,255, 2); 29 _assertPixelApprox(canvas, 98,48, 0,255,0,255, 2); 30 _assertPixelApprox(canvas, 48,1, 0,255,0,255, 2); 31 _assertPixelApprox(canvas, 48,48, 0,255,0,255, 2); 32 _assertPixelApprox(canvas, 51,1, 0,255,0,255, 2); 33 _assertPixelApprox(canvas, 51,48, 0,255,0,255, 2); 34 _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2); 35 _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2); 36 37 }, "Negative dimensions do not affect the direction of the image"); 38 </script>