Replacing non-portable CanvasRenderingContext.setFillColor with more portable variants.

tests/html/canvasrenderingcontext2d_test.dart

+// Copyright (c) 2012, 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.
+
+#library('url_test');
+#import('../../pkg/unittest/unittest.dart');
+#import('../../pkg/unittest/html_config.dart');
+#import('dart:html');
+
+main() {
+  useHtmlConfiguration();
+  var canvas = new CanvasElement();
+  canvas.width = 100;
+  canvas.height = 100;
+
+  var context = canvas.context2d;
+
+  Uint8ClampedArray readPixel() {
+    var imageData = context.getImageData(2, 2, 1, 1);
+    return imageData.data;
+  }
+
+  test('setFillColorRgb', () {
+    context.setFillColorRgb(255, 0, 255, 1);
+    context.fillRect(0, 0, canvas.width, canvas.height);
+    expect(readPixel(), [255, 0, 255, 255]);
+  });
+
+  test('setFillColorHsl hue', () {
+    context.setFillColorHsl(0, 100, 50);
+    context.fillRect(0, 0, canvas.width, canvas.height);
+    expect(readPixel(), [255, 0, 0, 255]);
+  });
+
+  test('setFillColorHsl hue 2', () {
+    context.setFillColorHsl(240, 100, 50);
+    context.fillRect(0, 0, canvas.width, canvas.height);
+    expect(readPixel(), [0, 0, 255, 255]);
+  });
+
+  test('setFillColorHsl sat', () {
+    context.setFillColorHsl(0, 0, 50);
+    context.fillRect(0, 0, canvas.width, canvas.height);
+    var pixel = readPixel();
+    // Some rounding errors in the browsers.
+    expect(pixel[0], closeTo(127, 1));
+    expect(pixel[1], closeTo(127, 1));
+    expect(pixel[2], closeTo(127, 1));
+    expect(pixel[3], 255);
+  });
+
+  test('setStrokeColorRgb', () {
+    context.setStrokeColorRgb(255, 0, 255, 1);
+    context.lineWidth = 10;
+    context.strokeRect(0, 0, canvas.width, canvas.height);
+    expect(readPixel(), [255, 0, 255, 255]);
+  });
+
+  test('setStrokeColorHsl hue', () {
+    context.setStrokeColorHsl(0, 100, 50);
+    context.lineWidth = 10;
+    context.strokeRect(0, 0, canvas.width, canvas.height);
+    expect(readPixel(), [255, 0, 0, 255]);
+  });
+
+  test('setStrokeColorHsl hue 2', () {
+    context.setStrokeColorHsl(240, 100, 50);
+    context.lineWidth = 10;
+    context.strokeRect(0, 0, canvas.width, canvas.height);
+    expect(readPixel(), [0, 0, 255, 255]);
+  });
+
+  test('setStrokeColorHsl sat', () {
+    context.setStrokeColorHsl(0, 0, 50);
+    context.lineWidth = 10;
+    context.strokeRect(0, 0, canvas.width, canvas.height);
+    var pixel = readPixel();
+    // Some rounding errors in the browsers.
+    expect(pixel[0], closeTo(127, 1));
+    expect(pixel[1], closeTo(127, 1));
+    expect(pixel[2], closeTo(127, 1));
+    expect(pixel[3], 255);
+  });
+}