LayoutTests/fast/canvas/canvas-strokePath-cap-join_t01.dart

/*
 * Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 * for details. All rights reserved. Use of this source code is governed by a
 * BSD-style license that can be found in the LICENSE file.
 */
/** 
 * @description Ensure correct behavior of canvas with path stroke with cap and join
 */
import "dart:html";
import "dart:math" as Math;
import "../../testcommon.dart";
import "../../../Utils/async_utils.dart";

main() {
  var canvas = document.createElement('canvas');
  document.body.append(canvas);
  canvas.setAttribute('width', '700');
  canvas.setAttribute('height', '200');
  var ctx = canvas.getContext('2d');

  ctx.miterLimit = 5;
  ctx.lineWidth = 15;

  ctx.fillStyle="rgba(255, 255, 255, 1.0)";
  ctx.fillRect(0, 0, 700, 200);

  ctx.strokeStyle="rgba(0, 0, 0, 1.0)";
  ctx.lineJoin = "miter";
  ctx.lineCap = "round";

  ctx.translate(0, 50);
  ctx.save();

  ctx.beginPath();
  ctx.moveTo(10, 100);
  ctx.lineTo(30, 2);
  ctx.lineTo(50, 100);
  ctx.stroke();

  ctx.translate(60 ,0);
  ctx.beginPath();
  ctx.moveTo(10, 100);
  ctx.lineTo(30, 3);
  ctx.lineTo(50, 100);
  ctx.stroke();

  ctx.translate(90 ,0);
  ctx.save();
  ctx.rotate(0.2);
  ctx.beginPath();
  ctx.moveTo(10, 100);
  ctx.lineTo(30, 3);
  ctx.lineTo(50, 100);
  ctx.closePath();
  ctx.stroke();
  ctx.restore();

  ctx.restore();

  ctx.lineJoin = "bevel";
  ctx.lineCap = "square";

  ctx.translate(200, 0);
  ctx.save();

  ctx.beginPath();
  ctx.moveTo(10, 100);
  ctx.lineTo(30, 2);
  ctx.lineTo(50, 100);
  ctx.stroke();

  ctx.translate(60 ,0);
  ctx.beginPath();
  ctx.moveTo(10, 100);
  ctx.lineTo(30, 3);
  ctx.lineTo(50, 100);
  ctx.stroke();

  ctx.translate(90 ,0);
  ctx.save();
  ctx.rotate(0.2);
  ctx.beginPath();
  ctx.moveTo(10, 100);
  ctx.lineTo(30, 3);
  ctx.lineTo(50, 100);
  ctx.closePath();
  ctx.stroke();
  ctx.restore();

  ctx.restore();

  ctx.lineJoin = "round";
  ctx.lineCap = "butt";

  ctx.translate(200, 0);
  ctx.save();

  ctx.beginPath();
  ctx.moveTo(10, 100);
  ctx.lineTo(30, 2);
  ctx.lineTo(50, 100);
  ctx.stroke();

  ctx.translate(60 ,0);
  ctx.beginPath();
  ctx.moveTo(10, 100);
  ctx.lineTo(30, 3);
  ctx.lineTo(50, 100);
  ctx.stroke();

  ctx.translate(90 ,0);
  ctx.save();
  ctx.rotate(0.2);
  ctx.beginPath();
  ctx.moveTo(10, 100);
  ctx.lineTo(30, 3);
  ctx.lineTo(50, 100);
  ctx.closePath();
  ctx.stroke();
  ctx.restore();

  ctx.restore();

  var imageData, data;

  // Verify Join : miter, Cap : round.
  imageData = ctx.getImageData(30, 51, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 0);

  imageData = ctx.getImageData(30, 49, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 255);

  imageData = ctx.getImageData(14, 154, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 0);

  imageData = ctx.getImageData(14, 157, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 255);

  imageData = ctx.getImageData(89, 22, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 0);

  imageData = ctx.getImageData(89, 12, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 255);

  imageData = ctx.getImageData(184, 29, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 0);

  imageData = ctx.getImageData(180, 27, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 255);

  imageData = ctx.getImageData(132, 152, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 0);

  imageData = ctx.getImageData(130, 157, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 255);

  // Verify Join : bevel, Cap : square.
  imageData = ctx.getImageData(202, 154, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 0);

  imageData = ctx.getImageData(201, 150, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 255);

  imageData = ctx.getImageData(228, 52, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 0);

  imageData = ctx.getImageData(225, 48, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 255);

  imageData = ctx.getImageData(316, 154, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 0);

  imageData = ctx.getImageData(316, 157, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 255);

  imageData = ctx.getImageData(289, 52, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 0);

  imageData = ctx.getImageData(289, 48, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 255);

  imageData = ctx.getImageData(372, 58, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 0);

  imageData = ctx.getImageData(373, 54, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 255);

  imageData = ctx.getImageData(380, 159, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 0);

  imageData = ctx.getImageData(383, 162, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 255);

  // Verify Join : round, Cap : butt.
  imageData = ctx.getImageData(405, 147, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 0);

  imageData = ctx.getImageData(405, 151, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 255);

  imageData = ctx.getImageData(429, 46, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 0);

  imageData = ctx.getImageData(429, 43, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 255);

  imageData = ctx.getImageData(464, 146, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 0);

  imageData = ctx.getImageData(464, 150, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 255);

  imageData = ctx.getImageData(489, 46, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 0);

  imageData = ctx.getImageData(489, 43, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 255);

  imageData = ctx.getImageData(534, 151, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 0);

  imageData = ctx.getImageData(531, 153, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 255);

  imageData = ctx.getImageData(579, 52, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 0);

  imageData = ctx.getImageData(579, 48, 1, 1);
  data = imageData.data;
  shouldBe(data[0], 255);
}