Translate image based on /Rotate.

Author: noctis0430

PdfSharpCore/Pdf.Advanced/PdfFormXObject.cs

@@ -212,9 +212,9 @@ internal PdfFormXObject(PdfDocument thisDocument, PdfImportedObjectTable importe
 
                 // Translate the image such that its center lies on the center of the rotated bounding box
                 double offset = (height - width) / 2;
-                if (height > width)
+                if (rotate == 90)
                     matrix.TranslatePrepend(offset, offset);
-                else
+                else if (rotate == -90)
                     matrix.TranslatePrepend(-offset, -offset);
 
                 //string item = "[" + PdfEncoders.ToString(matrix) + "]";