LayoutTests/fast/canvas/canvas-copyPixels_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 Test if putImageData gives back the same result as getImageData
 */
import "dart:html";
import "dart:math" as Math;
import "../../testcommon.dart";
import "../../../Utils/async_utils.dart";

main() {
  var ctx = createContext2d("canvas");

  ctx.fillStyle = "red";
  ctx.fillRect(0,0,50,20);
  ctx.fillStyle = "green";
  ctx.fillRect(50,0,50,20);
  ctx.fillStyle = "blue";
  ctx.fillRect(100,0,50,20);

  var data = ctx.getImageData(0,0,150,20);
  ctx.putImageData(data, 0, 20);

  var imageData = ctx.getImageData(1, 21, 48, 18);
  var imgdata = imageData.data;
  shouldBe(imgdata[4], 255);
  shouldBe(imgdata[5], 0);
  shouldBe(imgdata[6], 0);

  imageData = ctx.getImageData(51, 21, 48, 18);
  imgdata = imageData.data;
  shouldBe(imgdata[4], 0);
  shouldBe(imgdata[5], 128);
  shouldBe(imgdata[6], 0);

  imageData = ctx.getImageData(101, 21, 48, 18);
  imgdata = imageData.data;
  shouldBe(imgdata[4], 0);
  shouldBe(imgdata[5], 0);
  shouldBe(imgdata[6], 255);
}