blob: f12d0ac89c58bb79501d30e5a4d28b2a5a7ac370 [file] [log] [blame]
/*
* 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 fill + shadow after
* scaling. A blue and red checkered pattern should be displayed.
*/
import "dart:html";
import "dart:math" as Math;
import "../../testcommon.dart";
import "../../../Utils/async_utils.dart";
main() {
shouldBeAround(a, b) => shouldBeApprox(a, b, 20);
var canvas = document.createElement('canvas');
document.body.append(canvas);
canvas.setAttribute('width', '1000');
canvas.setAttribute('height', '1000');
var ctx = canvas.getContext('2d');
ctx.scale(2, 2);
ctx.shadowOffsetX = 100;
ctx.shadowOffsetY = 100;
ctx.fillStyle = 'rgba(0, 0, 255, 1)';
ctx.shadowColor = 'rgba(255, 0, 0, 1.0)';
ctx.beginPath();
ctx.moveTo(50, 50);
ctx.lineTo(100, 50);
ctx.lineTo(100, 100);
ctx.lineTo(50, 100);
ctx.fill();
ctx.shadowColor = 'rgba(255, 0, 0, 0.3)';
ctx.beginPath();
ctx.moveTo(50, 150);
ctx.lineTo(100, 150);
ctx.lineTo(100, 200);
ctx.lineTo(50, 200);
ctx.fill();
ctx.shadowColor = 'rgba(255, 0, 0, 1.0)';
ctx.shadowBlur = 10;
ctx.beginPath();
ctx.moveTo(150, 50);
ctx.lineTo(200, 50);
ctx.lineTo(200, 100);
ctx.lineTo(150, 100);
ctx.fill();
ctx.shadowColor = 'rgba(255, 0, 0, 0.3)';
ctx.beginPath();
ctx.moveTo(150, 150);
ctx.lineTo(200, 150);
ctx.lineTo(200, 200);
ctx.lineTo(150, 200);
ctx.fill();
var d; // imageData.data
// Verify solid shadow.
d = ctx.getImageData(201, 205, 1, 1).data;
shouldBe(d[0], 255);
shouldBe(d[1], 0);
shouldBe(d[2], 0);
shouldBe(d[3], 255);
d = ctx.getImageData(298, 295, 1, 1).data;
shouldBe(d[0], 255);
shouldBe(d[1], 0);
shouldBe(d[2], 0);
shouldBe(d[3], 255);
d = ctx.getImageData(201, 298, 1, 1).data;
shouldBe(d[0], 255);
shouldBe(d[1], 0);
shouldBe(d[2], 0);
shouldBe(d[3], 255);
// Verify solid alpha shadow.
d = ctx.getImageData(201, 405, 1, 1).data;
shouldBe(d[0], 255);
shouldBe(d[1], 0);
shouldBe(d[2], 0);
shouldBeAround(d[3], 76);
d = ctx.getImageData(298, 405, 1, 1).data;
shouldBe(d[0], 255);
shouldBe(d[1], 0);
shouldBe(d[2], 0);
shouldBeAround(d[3], 76);
d = ctx.getImageData(205, 498, 1, 1).data;
shouldBe(d[0], 255);
shouldBe(d[1], 0);
shouldBe(d[2], 0);
shouldBeAround(d[3], 76);
// Verify blurry shadow.
d = ctx.getImageData(398, 205, 1, 1).data;
shouldBe(d[0], 255);
shouldBe(d[1], 0);
shouldBe(d[2], 0);
shouldBeAround(d[3], 83);
d = ctx.getImageData(501, 205, 1, 1).data;
shouldBe(d[0], 255);
shouldBe(d[1], 0);
shouldBe(d[2], 0);
shouldBeAround(d[3], 83);
d = ctx.getImageData(500, 300, 1, 1).data;
shouldBe(d[0], 255);
shouldBe(d[1], 0);
shouldBe(d[2], 0);
shouldBeAround(d[3], 53);
// Verify blurry alpha shadow.
d = ctx.getImageData(398, 405, 1, 1).data;
shouldBe(d[0], 255);
shouldBe(d[1], 0);
shouldBe(d[2], 0);
shouldBeAround(d[3], 24);
d = ctx.getImageData(405, 501, 1, 1).data;
shouldBe(d[0], 255);
shouldBe(d[1], 0);
shouldBe(d[2], 0);
shouldBeAround(d[3], 24);
d = ctx.getImageData(405, 501, 1, 1).data;
shouldBe(d[0], 255);
shouldBe(d[1], 0);
shouldBe(d[2], 0);
shouldBeAround(d[3], 24);
}