Add interlace powerpoint image touch #76 [skip ci]

tests/ImageSharp.Tests/FileTestBase.cs

@@ -33,6 +33,7 @@ namespace ImageSharp.Tests
             // TestFile.Create(TestImages.Png.Blur), // Perf: Enable for local testing only
             // TestFile.Create(TestImages.Png.Indexed), // Perf: Enable for local testing only
             TestFile.Create(TestImages.Png.Splash),
+            TestFile.Create(TestImages.Png.Powerpoint),
             // TestFile.Create(TestImages.Png.SplashInterlaced), // Perf: Enable for local testing only
             // TestFile.Create(TestImages.Png.Interlaced), // Perf: Enable for local testing only
             // TestFile.Create(TestImages.Png.Filter0), // Perf: Enable for local testing only

tests/ImageSharp.Tests/TestImages.cs

@@ -19,6 +19,7 @@ namespace ImageSharp.Tests
             public const string Blur = "Png/blur.png";
             public const string Indexed = "Png/indexed.png";
             public const string Splash = "Png/splash.png";
+            public const string Powerpoint = "Png/pp.png";
 
             public const string SplashInterlaced = "Png/splash-interlaced.png";
 

tests/ImageSharp.Tests/TestImages/Formats/Png/pp.png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:99879d99fa8589427023012a0388ab0380b6d30b54921e2b7a39f43ae4b1bcc3
+size 12867