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 /// 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 /// 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; }