| // DO NOT EDIT! This test has been generated by tools/gentest.py. |
| // OffscreenCanvas test in a worker:2d.transformation.transform.skewed |
| // Description:transform() with skewy matrix transforms correctly |
| // Note: |
| |
| importScripts("/resources/testharness.js"); |
| importScripts("/common/canvas-tests.js"); |
| |
| var t = async_test("transform() with skewy matrix transforms correctly"); |
| t.step(function() { |
| |
| var offscreenCanvas = new OffscreenCanvas(100, 50); |
| var ctx = offscreenCanvas.getContext('2d'); |
| |
| // Create green with a red square ring inside it |
| ctx.fillStyle = '#0f0'; |
| ctx.fillRect(0, 0, 100, 50); |
| ctx.fillStyle = '#f00'; |
| ctx.fillRect(20, 10, 60, 30); |
| ctx.fillStyle = '#0f0'; |
| ctx.fillRect(40, 20, 20, 10); |
| // Draw a skewed shape to fill that gap, to make sure it is aligned correctly |
| ctx.transform(1,4, 2,3, 5,6); |
| // Post-transform coordinates: |
| // [[20,10],[80,10],[80,40],[20,40],[20,10],[40,20],[40,30],[60,30],[60,20],[40,20],[20,10]]; |
| // Hence pre-transform coordinates: |
| var pts=[[-7.4,11.2],[-43.4,59.2],[-31.4,53.2],[4.6,5.2],[-7.4,11.2], |
| [-15.4,25.2],[-11.4,23.2],[-23.4,39.2],[-27.4,41.2],[-15.4,25.2], |
| [-7.4,11.2]]; |
| ctx.beginPath(); |
| ctx.moveTo(pts[0][0], pts[0][1]); |
| for (var i = 0; i < pts.length; ++i) |
| ctx.lineTo(pts[i][0], pts[i][1]); |
| ctx.fill(); |
| _assertPixel(offscreenCanvas, 21,11, 0,255,0,255, "21,11", "0,255,0,255"); |
| _assertPixel(offscreenCanvas, 79,11, 0,255,0,255, "79,11", "0,255,0,255"); |
| _assertPixel(offscreenCanvas, 21,39, 0,255,0,255, "21,39", "0,255,0,255"); |
| _assertPixel(offscreenCanvas, 79,39, 0,255,0,255, "79,39", "0,255,0,255"); |
| _assertPixel(offscreenCanvas, 39,19, 0,255,0,255, "39,19", "0,255,0,255"); |
| _assertPixel(offscreenCanvas, 61,19, 0,255,0,255, "61,19", "0,255,0,255"); |
| _assertPixel(offscreenCanvas, 39,31, 0,255,0,255, "39,31", "0,255,0,255"); |
| _assertPixel(offscreenCanvas, 61,31, 0,255,0,255, "61,31", "0,255,0,255"); |
| |
| t.done(); |
| |
| }); |
| done(); |