Fix identity checks

Author: JimBobSquarePants

src/ImageSharp/Common/Helpers/QuadDistortionHelper.cs

@@ -23,7 +23,12 @@ internal static class QuadDistortionHelper
     /// This method is based on the algorithm described in the following article:
     /// <see href="https://blog.mbedded.ninja/mathematics/geometry/projective-transformations/"/>
     /// </remarks>
-    public static Matrix4x4 ComputeQuadDistortMatrix(Rectangle rectangle, PointF topLeft, PointF topRight, PointF bottomRight, PointF bottomLeft)
+    public static Matrix4x4 ComputeQuadDistortMatrix(
+        Rectangle rectangle,
+        PointF topLeft,
+        PointF topRight,
+        PointF bottomRight,
+        PointF bottomLeft)
     {
         PointF p1 = new(rectangle.X, rectangle.Y);
         PointF p2 = new(rectangle.X + rectangle.Width, rectangle.Y);

src/ImageSharp/Processing/Processors/Transforms/TransformUtils.cs

@@ -301,7 +301,7 @@ public static Size GetTransformedSize(Matrix4x4 matrix, Size size)
     {
         Guard.IsTrue(size.Width > 0 && size.Height > 0, nameof(size), "Source size dimensions cannot be 0!");
 
-        if (matrix.Equals(default) || matrix.Equals(Matrix4x4.Identity))
+        if (matrix.IsIdentity || matrix.Equals(default))
         {
             return size;
         }
@@ -376,7 +376,7 @@ private static Size GetTransformedSize(Matrix3x2 matrix, Size size, TransformSpa
     {
         Guard.IsTrue(size.Width > 0 && size.Height > 0, nameof(size), "Source size dimensions cannot be 0!");
 
-        if (matrix.Equals(default) || matrix.Equals(Matrix3x2.Identity))
+        if (matrix.IsIdentity || matrix.Equals(default))
         {
             return size;
         }
@@ -412,7 +412,7 @@ private static Size GetTransformedSize(Matrix3x2 matrix, Size size, TransformSpa
     /// </returns>
     private static bool TryGetTransformedRectangle(RectangleF rectangle, Matrix3x2 matrix, out Rectangle bounds)
     {
-        if (rectangle.Equals(default) || Matrix3x2.Identity.Equals(matrix))
+        if (matrix.IsIdentity || rectangle.Equals(default))
         {
             bounds = default;
             return false;
@@ -439,7 +439,7 @@ private static bool TryGetTransformedRectangle(RectangleF rectangle, Matrix3x2 m
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     private static bool TryGetTransformedRectangle(RectangleF rectangle, Matrix4x4 matrix, out Rectangle bounds)
     {
-        if (rectangle.Equals(default) || Matrix4x4.Identity.Equals(matrix))
+        if (matrix.IsIdentity || rectangle.Equals(default))
         {
             bounds = default;
             return false;