diff options
Diffstat (limited to 'testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.wrap.worker.js')
-rw-r--r-- | testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.wrap.worker.js | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.wrap.worker.js b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.wrap.worker.js new file mode 100644 index 0000000000..4d0c2f5b5d --- /dev/null +++ b/testing/web-platform/tests/html/canvas/offscreen/transformations/2d.transformation.rotate.wrap.worker.js @@ -0,0 +1,33 @@ +// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. +// OffscreenCanvas test in a worker:2d.transformation.rotate.wrap +// Description:rotate() wraps large positive values correctly +// Note: + +importScripts("/resources/testharness.js"); +importScripts("/html/canvas/resources/canvas-tests.js"); + +var t = async_test("rotate() wraps large positive values correctly"); +var t_pass = t.done.bind(t); +var t_fail = t.step_func(function(reason) { + throw reason; +}); +t.step(function() { + + var canvas = new OffscreenCanvas(100, 50); + var ctx = canvas.getContext('2d'); + + ctx.fillStyle = '#f00'; + ctx.fillRect(0, 0, 100, 50); + + ctx.rotate(Math.PI * (1 + 4096)); // == pi (mod 2*pi) + // We need about pi +/- 0.001 in order to get correct-looking results + // 32-bit floats can store pi*4097 with precision 2^-10, so that should + // be safe enough on reasonable implementations + ctx.fillStyle = '#0f0'; + ctx.fillRect(-100, -50, 100, 50); + _assertPixel(canvas, 50,25, 0,255,0,255); + _assertPixel(canvas, 98,2, 0,255,0,255); + _assertPixel(canvas, 98,47, 0,255,0,255); + t.done(); +}); +done(); |