Add test data for RGB24

tests/ImageSharp.Tests/Formats/Png/PngDecoderTests.cs

@@ -718,8 +718,8 @@ public partial class PngDecoderTests
     [WithFile(TestImages.Png.Cgbi.Issue410, PixelTypes.Rgba32)]
     [WithFile(TestImages.Png.Cgbi.Colors, PixelTypes.Rgba32)]
     [WithFile(TestImages.Png.Cgbi.Clocks, PixelTypes.Rgba32)]
-    [WithFile(TestImages.Png.Cgbi.Flecks, PixelTypes.Rgba32)]
     [WithFile(TestImages.Png.Cgbi.Screen, PixelTypes.Rgba32)]
+    [WithFile(TestImages.Png.Cgbi.Flecks, PixelTypes.Rgb24)]
     public void Decode_AppleCgBI<TPixel>(TestImageProvider<TPixel> provider)
         where TPixel : unmanaged, IPixel<TPixel>
     {
@@ -731,6 +731,7 @@ public partial class PngDecoderTests
     [Theory]
     [InlineData(TestImages.Png.Cgbi.Colors, 120, 120)]
     [InlineData(TestImages.Png.Cgbi.Issue410, 42, 26)]
+    [InlineData(TestImages.Png.Cgbi.Flecks, 510, 512)]
     public void Identify_AppleCgBI(string imagePath, int expectedWidth, int expectedHeight)
     {
         TestFile testFile = TestFile.Create(imagePath);

tests/Images/External/ReferenceOutput/PngDecoderTests/Decode_AppleCgBI_Rgb24_flecks_ImageThreshold-0_PerPixelManhattanThreshold-0.png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:10ee142fc1d3638ebe53fdd21c0a4c53008801befcc5e986051b796561cae887
+size 237676

tests/Images/External/ReferenceOutput/PngDecoderTests/Decode_AppleCgBI_Rgba32_flecks_ImageThreshold-0_PerPixelManhattanThreshold-0.png

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:91bbb6c87f128920d4384f3be2e85ecd176e49a7a5166c6c6aa584e60d8131ed
-size 204053

tests/Images/Input/Png/cgbi/flecks.png

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:314a5a52996953c0c12862262b4ff3fc191d8b6f2b7bb3853cdcea3267a4142d
-size 212163
+oid sha256:6be7b478594ba5e4d37bc135c881c0a16cf1c804fece5440bab997c7b69182f1
+size 187703