public async Task GetClustersAsync_SameFiles_ReturnsZero()
{
using var leftImgCopy1 = new Bitmap(leftImg1);
using var leftImgCopy2 = new Bitmap(leftImg1);
var leftBits = leftImgCopy1.LockBits(
new Rectangle(0, 0, leftImgCopy1.Width, leftImgCopy1.Height),
ImageLockMode.ReadWrite,
PixelFormat.Format32bppArgb);
var rightBits = leftImgCopy2.LockBits(
new Rectangle(0, 0, leftImgCopy2.Width, leftImgCopy2.Height),
ImageLockMode.ReadWrite,
PixelFormat.Format32bppArgb);
await diff.ImagePreprocessor.ProcessAsync(leftBits);
await diff.ImagePreprocessor.ProcessAsync(rightBits);
var pixels = await diff.GetDifferentPixelsAsync(25, leftBits, rightBits);
var clusters = new List <Rectangle>();
await foreach (var cluster in _testClass.GetClustersAsync(pixels, int.MaxValue))
{
clusters.Add(cluster);
}
Assert.AreEqual(0, clusters.Count);
leftImgCopy1.UnlockBits(leftBits);
leftImgCopy2.UnlockBits(rightBits);
}
/// <summary>
/// Asynchronously calculate difference between provided images
/// </summary>
/// <param name="errorTolerance">Maximum allowed pixel delta</param>
/// <param name="maxDifferences">Maximum differences to recognize</param>
/// <returns>Image with highlighted differences</returns>
public async Task <Image> CalculateAsync(double errorTolerance, int maxDifferences = int.MaxValue)
{
using var leftCopy = new Bitmap(_left);
using var rightCopy = new Bitmap(_right);
var leftBits = leftCopy.LockBits(
new Rectangle(0, 0, leftCopy.Width, leftCopy.Height),
ImageLockMode.ReadWrite,
PixelFormat.Format32bppArgb);
var rightBits = rightCopy.LockBits(
new Rectangle(0, 0, rightCopy.Width, rightCopy.Height),
ImageLockMode.ReadWrite,
PixelFormat.Format32bppArgb);
if (await PreprocessAsync(leftBits, rightBits) && _progressObserver != null)
{
await _progressObserver.ReportAsync(leftCopy, "leftPreprocess");
await _progressObserver.ReportAsync(rightCopy, "rightPreprocess");
}
var pixels = await _diffAlgorithm.GetDifferentPixelsAsync(errorTolerance, leftBits, rightBits, _progressObserver);
leftCopy.UnlockBits(leftBits);
rightCopy.UnlockBits(rightBits);
var result = new Bitmap(_left);
if (_diffHighlighter != null)
{
await _diffHighlighter.HighlightAsync(result, pixels, maxDifferences, _progressObserver);
}
return(result);
}