public void Diffmask(string pathPic1, string pathPic2, int expectedMeanError, int expectedAbsoluteError, int expectedPixelErrorCount, double expectedPixelErrorPercentage)
{
using (var fileStreamDifferenceMask = File.Create("differenceMask.png"))
using (var maskImage = ImageSharpCompare.CalcDiffMaskImage(pathPic1, pathPic2))
{
SixLabors.ImageSharp.ImageExtensions.SaveAsPng(maskImage, fileStreamDifferenceMask);
}
var maskedDiff = ImageSharpCompare.CalcDiff(pathPic1, pathPic2, "differenceMask.png");
Assert.That(maskedDiff.AbsoluteError, Is.EqualTo(expectedAbsoluteError), "AbsoluteError");
Assert.That(maskedDiff.MeanError, Is.EqualTo(expectedMeanError), "MeanError");
Assert.That(maskedDiff.PixelErrorCount, Is.EqualTo(expectedPixelErrorCount), "PixelErrorCount");
Assert.That(maskedDiff.PixelErrorPercentage, Is.EqualTo(expectedPixelErrorPercentage), "PixelErrorPercentage");
}
public void DiffmaskSteams(string pathPic1, string pathPic2, int expectedMeanError, int expectedAbsoluteError, int expectedPixelErrorCount, double expectedPixelErrorPercentage)
{
using var pic1 = new FileStream(pathPic1, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
using var pic2 = new FileStream(pathPic2, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
using var maskImage = ImageSharpCompare.CalcDiffMaskImage(pic1, pic2);
pic1.Position = 0;
pic2.Position = 0;
var maskedDiff = ImageSharpCompare.CalcDiff(pic1, pic2, maskImage);
Assert.That(maskedDiff.AbsoluteError, Is.EqualTo(expectedAbsoluteError), "AbsoluteError");
Assert.That(maskedDiff.MeanError, Is.EqualTo(expectedMeanError), "MeanError");
Assert.That(maskedDiff.PixelErrorCount, Is.EqualTo(expectedPixelErrorCount), "PixelErrorCount");
Assert.That(maskedDiff.PixelErrorPercentage, Is.EqualTo(expectedPixelErrorPercentage), "PixelErrorPercentage");
}
public static void AssertImagesEqual <TPixel>(Image <TPixel> actualImage,
string referenceName) where TPixel : unmanaged, IPixel <TPixel>
{
var imageBasename = TestContext.CurrentContext.Test.FullName.Replace("OpenTemple.Tests.", "")
+ Path.GetFileNameWithoutExtension(referenceName);
var actualPath = imageBasename + "_actual.png";
actualImage.Save(actualPath);
var expectedPath = TestData.GetPath(referenceName);
if (!File.Exists(expectedPath))
{
File.Copy(actualPath, expectedPath);
throw new NUnitException("Reference file didn't exist: " + expectedPath
+ " copied actual to its location");
}
using var expectedImage = Image.Load(expectedPath);
using var expectedImage32 = expectedImage.CloneAs <Rgba32>();
using var actualImage32 = actualImage.CloneAs <Rgba32>();
var imageDiff = ImageSharpCompare.CalcDiff(actualImage32, expectedImage32);
if (imageDiff.PixelErrorCount > 0)
{
// Re-save the expected image so it is next to the actual and difference
File.Delete(imageBasename + "_expected.png");
File.Copy(expectedPath, imageBasename + "_expected.png");
// Calculate the difference as an image
var visualDifference = imageBasename + "_difference.png";
using (var maskImage = ImageSharpCompare.CalcDiffMaskImage(actualImage32, expectedImage32))
maskImage.SaveAsPng(visualDifference);
TestContext.AddTestAttachment(actualPath, "Actual image");
TestContext.AddTestAttachment(imageBasename + "_expected.png", "Expected image");
TestContext.AddTestAttachment(visualDifference, "Visual difference");
Assert.AreEqual(0, imageDiff.PixelErrorCount, "Images are different, see "
+ actualPath + " and " + visualDifference);
}
}