2d.text.measure.actualBoundingBox.worker.js (2870B)
1 // DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. 2 // OffscreenCanvas test in a worker:2d.text.measure.actualBoundingBox 3 // Description:Testing actualBoundingBox 4 // Note: 5 6 importScripts("/resources/testharness.js"); 7 importScripts("/html/canvas/resources/canvas-tests.js"); 8 9 promise_test(async t => { 10 var canvas = new OffscreenCanvas(100, 50); 11 var ctx = canvas.getContext('2d'); 12 13 var f = new FontFace("CanvasTest", "url('/fonts/CanvasTest.ttf')"); 14 f.load(); 15 self.fonts.add(f); 16 await self.fonts.ready; 17 ctx.font = '50px CanvasTest'; 18 ctx.direction = 'ltr'; 19 ctx.align = 'left' 20 ctx.baseline = 'alphabetic' 21 // Different platforms may render text slightly different. 22 // Values that are nominally expected to be zero might actually vary by a 23 // pixel or so if the UA accounts for antialiasing at glyph edges, so we 24 // allow a slight deviation. 25 _assert(Math.abs(ctx.measureText('A').actualBoundingBoxLeft) <= 1, "Math.abs(ctx.measureText('A').actualBoundingBoxLeft) <= 1"); 26 _assert(ctx.measureText('A').actualBoundingBoxRight >= 50, "ctx.measureText('A').actualBoundingBoxRight >= 50"); 27 _assert(ctx.measureText('A').actualBoundingBoxAscent >= 35, "ctx.measureText('A').actualBoundingBoxAscent >= 35"); 28 _assert(Math.abs(ctx.measureText('A').actualBoundingBoxDescent) <= 1, "Math.abs(ctx.measureText('A').actualBoundingBoxDescent) <= 1"); 29 30 _assert(ctx.measureText('D').actualBoundingBoxLeft >= 48, "ctx.measureText('D').actualBoundingBoxLeft >= 48"); 31 _assert(ctx.measureText('D').actualBoundingBoxLeft <= 52, "ctx.measureText('D').actualBoundingBoxLeft <= 52"); 32 _assert(ctx.measureText('D').actualBoundingBoxRight >= 75, "ctx.measureText('D').actualBoundingBoxRight >= 75"); 33 _assert(ctx.measureText('D').actualBoundingBoxRight <= 80, "ctx.measureText('D').actualBoundingBoxRight <= 80"); 34 _assert(ctx.measureText('D').actualBoundingBoxAscent >= 35, "ctx.measureText('D').actualBoundingBoxAscent >= 35"); 35 _assert(ctx.measureText('D').actualBoundingBoxAscent <= 40, "ctx.measureText('D').actualBoundingBoxAscent <= 40"); 36 _assert(ctx.measureText('D').actualBoundingBoxDescent >= 12, "ctx.measureText('D').actualBoundingBoxDescent >= 12"); 37 _assert(ctx.measureText('D').actualBoundingBoxDescent <= 15, "ctx.measureText('D').actualBoundingBoxDescent <= 15"); 38 39 _assert(Math.abs(ctx.measureText('ABCD').actualBoundingBoxLeft) <= 1, "Math.abs(ctx.measureText('ABCD').actualBoundingBoxLeft) <= 1"); 40 _assert(ctx.measureText('ABCD').actualBoundingBoxRight >= 200, "ctx.measureText('ABCD').actualBoundingBoxRight >= 200"); 41 _assert(ctx.measureText('ABCD').actualBoundingBoxAscent >= 85, "ctx.measureText('ABCD').actualBoundingBoxAscent >= 85"); 42 _assert(ctx.measureText('ABCD').actualBoundingBoxDescent >= 37, "ctx.measureText('ABCD').actualBoundingBoxDescent >= 37"); 43 }, "Testing actualBoundingBox"); 44 done();