From 4f1b6dd325133c60577e591c2a3b7044abfcb9a6 Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Thu, 7 Dec 2017 12:12:40 +1100
Subject: [PATCH] Add comments

---
 .../Processing/Processors/Transforms/RotateProcessor.cs         | 1 +
 .../Processing/Processors/Transforms/SkewProcessor.cs           | 1 +
 .../Processing/Processors/Transforms/TransformProcessor.cs      | 2 ++
 3 files changed, 4 insertions(+)

diff --git a/src/ImageSharp/Processing/Processors/Transforms/RotateProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/RotateProcessor.cs
index e3fd36ce69..b59918cea4 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/RotateProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/RotateProcessor.cs
@@ -47,6 +47,7 @@ namespace SixLabors.ImageSharp.Processing.Processors
         /// <inheritdoc/>
         protected override Matrix3x2 GetTransformMatrix()
         {
+            // Tansforms are inverted else the output is the opposite of the expected.
             Matrix3x2 matrix = Matrix3x2Extensions.CreateRotationDegrees(this.Degrees, PointF.Empty);
             Matrix3x2.Invert(matrix, out matrix);
             return matrix;
diff --git a/src/ImageSharp/Processing/Processors/Transforms/SkewProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/SkewProcessor.cs
index eb9f068db0..321a6abe16 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/SkewProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/SkewProcessor.cs
@@ -50,6 +50,7 @@ namespace SixLabors.ImageSharp.Processing.Processors
         /// <inheritdoc/>
         protected override Matrix3x2 GetTransformMatrix()
         {
+            // Tansforms are inverted else the output is the opposite of the expected.
             Matrix3x2 matrix = Matrix3x2Extensions.CreateSkewDegrees(this.DegreesX, this.DegreesY, PointF.Empty);
             Matrix3x2.Invert(matrix, out matrix);
             return matrix;
diff --git a/src/ImageSharp/Processing/Processors/Transforms/TransformProcessor.cs b/src/ImageSharp/Processing/Processors/Transforms/TransformProcessor.cs
index 45e9d4dd5e..6ed8c31dd4 100644
--- a/src/ImageSharp/Processing/Processors/Transforms/TransformProcessor.cs
+++ b/src/ImageSharp/Processing/Processors/Transforms/TransformProcessor.cs
@@ -30,6 +30,8 @@ namespace SixLabors.ImageSharp.Processing.Processors
         public TransformProcessor(Matrix3x2 matrix, IResampler sampler)
             : base(sampler)
         {
+
+            // Tansforms are inverted else the output is the opposite of the expected.
             Matrix3x2.Invert(matrix, out matrix);
             this.TransformMatrix = matrix;
         }