| <!DOCTYPE html> |
| <html> |
| <head></head> |
| <body> |
| <canvas id="mycanvas" width="400" height="400"></canvas> |
| <script src="../../resources/js-test.js"></script> |
| <script> |
| description("This tests checks that ellipse can draw lines correctly in edge cases."); |
| var canvas = document.getElementById('mycanvas'); |
| var ctx = canvas.getContext('2d'); |
| |
| var zero = 0; |
| ctx.lineWidth = 5; |
| ctx.fillStyle = 'rgb(255, 255, 255)'; |
| ctx.strokeStyle = 'rgb(0, 0, 0)'; |
| ctx.fillRect(0, 0, canvas.width, canvas.height); |
| |
| var imageData = ctx.getImageData(1, 1, 1, 1); |
| var data = imageData.data; |
| shouldBe("imageData.data[1]", "255"); |
| |
| ctx.save(); |
| debug("moveTo + empty ellipse (swing == 0)"); |
| ctx.translate(0, 30); |
| ctx.save(); |
| ctx.beginPath(); |
| ctx.moveTo(20, 0); |
| ctx.ellipse(80, 0, 10, 20, Math.PI / 6, -Math.PI / 2, -Math.PI / 2 + zero, false); |
| ctx.stroke(); |
| ctx.restore(); |
| |
| imageData = ctx.getImageData(23, 29, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(85, 14, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| |
| debug("moveTo + empty ellipse (radiusX == 0)"); |
| ctx.translate(0, 30); |
| ctx.save(); |
| ctx.beginPath(); |
| ctx.moveTo(20, 0); |
| ctx.ellipse(80, 0, zero, 20, Math.PI / 6, -Math.PI / 2, Math.PI / 2, false); |
| ctx.stroke(); |
| ctx.restore(); |
| |
| imageData = ctx.getImageData(22, 60, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(86, 43, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(71, 73, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| |
| debug("moveTo + empty ellipse (radiusY == 0)"); |
| ctx.translate(0, 30); |
| ctx.save(); |
| ctx.beginPath(); |
| ctx.moveTo(20, 0); |
| ctx.ellipse(80, 0, 10, zero, Math.PI / 6, -Math.PI / 2, Math.PI / 2, false); |
| ctx.stroke(); |
| ctx.restore(); |
| |
| imageData = ctx.getImageData(22, 90, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(79, 90, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(87, 94, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| |
| debug("empty ellipse (swing == 0) + lineTo"); |
| ctx.translate(0, 30); |
| ctx.save(); |
| ctx.beginPath(); |
| ctx.ellipse(20, 0, 10, 20, Math.PI / 6, -Math.PI / 2, -Math.PI / 2 + zero, false); |
| ctx.lineTo(80, 0); |
| ctx.stroke(); |
| ctx.restore(); |
| |
| imageData = ctx.getImageData(26, 101, 1, 1); |
| shouldBe("imageData.data[1]", "255"); |
| imageData = ctx.getImageData(32, 103, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(77, 119, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| |
| debug("empty ellipse (radiusX == 0) + lineTo"); |
| ctx.translate(0, 30); |
| ctx.save(); |
| ctx.beginPath(); |
| ctx.ellipse(20, 0, zero, 20, Math.PI / 6, -Math.PI / 2, Math.PI / 2, false); |
| ctx.lineTo(80, 0); |
| ctx.stroke(); |
| ctx.restore(); |
| |
| imageData = ctx.getImageData(28, 135, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(11, 166, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(76, 151, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| |
| debug("empty ellipse (radiusY == 0) + lineTo"); |
| ctx.translate(0, 30); |
| ctx.save(); |
| ctx.beginPath(); |
| ctx.ellipse(20, 0, 10, zero, Math.PI / 6, -Math.PI / 2, Math.PI / 2, false); |
| ctx.lineTo(80, 0); |
| ctx.stroke(); |
| ctx.restore(); |
| |
| imageData = ctx.getImageData(27, 183, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(21, 179, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(77, 180, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| |
| ctx.restore(); |
| |
| ctx.translate(100, 0); |
| ctx.save(); |
| debug("lineTo + empty ellipse (radiusX == 0) + lineTo"); |
| debug(" 1. sweepAngle < PI / 2"); |
| ctx.translate(0, 30); |
| ctx.save(); |
| ctx.beginPath(); |
| ctx.lineTo(10, 0); |
| ctx.ellipse(20, 0, zero, 20, Math.PI / 6, -Math.PI / 4, Math.PI / 4, false); |
| ctx.lineTo(80, 0); |
| ctx.stroke(); |
| ctx.restore(); |
| |
| imageData = ctx.getImageData(110, 29, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(122, 22, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(113, 42, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(143, 38, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| |
| debug(" 2. sweepAngle < PI"); |
| ctx.translate(0, 30); |
| ctx.save(); |
| ctx.beginPath(); |
| ctx.lineTo(10, 0); |
| ctx.ellipse(20, 0, zero, 20, Math.PI / 6, -Math.PI / 4, Math.PI / 2, false); |
| ctx.lineTo(80, 0); |
| ctx.stroke(); |
| ctx.restore(); |
| |
| imageData = ctx.getImageData(122, 54, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(112, 76, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(142, 70, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| |
| debug(" 3. sweepAngle < 2PI"); |
| ctx.translate(0, 30); |
| ctx.save(); |
| ctx.beginPath(); |
| ctx.lineTo(10, 0); |
| ctx.ellipse(20, 0, zero, 20, Math.PI / 6, -Math.PI / 4, Math.PI * 3 / 2, false); |
| ctx.lineTo(80, 0); |
| ctx.stroke(); |
| ctx.restore(); |
| |
| imageData = ctx.getImageData(115, 86, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(110, 104, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(138, 77, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| |
| debug(" 4. sweepAngle < 4PI"); |
| ctx.translate(0, 30); |
| ctx.save(); |
| ctx.beginPath(); |
| ctx.lineTo(10, 0); |
| ctx.ellipse(20, 0, zero, 20, Math.PI / 6, -Math.PI / 4, Math.PI * 2, false); |
| ctx.lineTo(80, 0); |
| ctx.stroke(); |
| ctx.restore(); |
| |
| imageData = ctx.getImageData(115, 116, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(111, 136, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(127, 106, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(127, 121, 1, 1); |
| shouldBe("imageData.data[1]", "255"); |
| |
| debug(" 5. sweepAngle > 4PI"); |
| ctx.translate(0, 30); |
| ctx.save(); |
| ctx.beginPath(); |
| ctx.lineTo(10, 0); |
| ctx.ellipse(20, 0, zero, 20, Math.PI / 6, -Math.PI / 4, Math.PI * 16, false); |
| ctx.lineTo(80, 0); |
| ctx.stroke(); |
| ctx.restore(); |
| |
| imageData = ctx.getImageData(115, 146, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(111, 166, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(127, 136, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(127, 151, 1, 1); |
| shouldBe("imageData.data[1]", "255"); |
| |
| ctx.restore(); |
| |
| ctx.translate(100, 0); |
| ctx.save(); |
| debug("lineTo + empty ellipse (radiusY == 0) + lineTo"); |
| debug(" 1. sweepAngle < PI / 2"); |
| ctx.translate(0, 30); |
| ctx.save(); |
| ctx.beginPath(); |
| ctx.lineTo(10, 0); |
| ctx.ellipse(20, 0, 20, zero, Math.PI / 6, -Math.PI / 4, Math.PI / 4, false); |
| ctx.lineTo(80, 0); |
| ctx.stroke(); |
| ctx.restore(); |
| |
| imageData = ctx.getImageData(213, 32, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(234, 39, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(240, 36, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| |
| debug(" 2. sweepAngle < PI"); |
| ctx.translate(0, 30); |
| ctx.save(); |
| ctx.beginPath(); |
| ctx.lineTo(10, 0); |
| ctx.ellipse(20, 0, 20, zero, Math.PI / 6, -Math.PI / 4, Math.PI / 2, false); |
| ctx.lineTo(80, 0); |
| ctx.stroke(); |
| ctx.restore(); |
| |
| imageData = ctx.getImageData(232, 69, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(238, 72, 1, 1); |
| shouldBe("imageData.data[1]", "255"); |
| imageData = ctx.getImageData(228, 65, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(242, 61, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| |
| debug(" 3. sweepAngle < 2PI"); |
| ctx.translate(0, 30); |
| ctx.save(); |
| ctx.beginPath(); |
| ctx.lineTo(10, 0); |
| ctx.ellipse(20, 0, 20, zero, Math.PI / 6, -Math.PI / 4, Math.PI * 3 / 2, false); |
| ctx.lineTo(80, 0); |
| ctx.stroke(); |
| ctx.restore(); |
| |
| imageData = ctx.getImageData(204, 82, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(234, 100, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(212, 92, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(240, 90, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| |
| debug(" 4. sweepAngle < 4PI"); |
| ctx.translate(0, 30); |
| ctx.save(); |
| ctx.beginPath(); |
| ctx.lineTo(10, 0); |
| ctx.ellipse(20, 0, 20, zero, Math.PI / 6, -Math.PI / 4, Math.PI * 2, false); |
| ctx.lineTo(80, 0); |
| ctx.stroke(); |
| ctx.restore(); |
| |
| imageData = ctx.getImageData(208, 114, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(235, 130, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(210, 120, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(252, 124, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| |
| debug(" 5. sweepAngle > 4PI"); |
| ctx.translate(0, 30); |
| ctx.save(); |
| ctx.beginPath(); |
| ctx.lineTo(10, 0); |
| ctx.ellipse(20, 0, 20, zero, Math.PI / 6, -Math.PI / 4, Math.PI * 16, false); |
| ctx.lineTo(80, 0); |
| ctx.stroke(); |
| ctx.restore(); |
| |
| imageData = ctx.getImageData(208, 144, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(235, 160, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(210, 150, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| imageData = ctx.getImageData(252, 154, 1, 1); |
| shouldBe("imageData.data[1]", "0"); |
| |
| </script> |
| </body> |
| </html> |
