Add MagSetFullscreenTransform

Author: AArnott

src/Magnification/Magnification.cs

@@ -106,5 +106,19 @@ public static extern unsafe bool MagSetFullscreenColorEffect(
         [return: MarshalAs(UnmanagedType.Bool)]
         public static extern unsafe bool MagGetFullscreenColorEffect(
             [Friendly(FriendlyFlags.Out)] MAGCOLOREFFECT* pEffect);
+
+        /// <summary>
+        /// Changes the magnification settings for the full-screen magnifier.
+        /// </summary>
+        /// <param name="magLevel">The new magnification factor for the full-screen magnifier. The minimum value of this parameter is 1.0, and the maximum value is 4096.0. If this value is 1.0, the screen content is not magnified and no offsets are applied. </param>
+        /// <param name="xOffset">The new x-coordinate offset, in pixels, for the upper-left corner of the magnified view. The offset is relative to the upper-left corner of the primary monitor, in unmagnified coordinates. The minimum value of the parameter is -262144, and the maximum value is 262144.</param>
+        /// <param name="yOffset">The new y-coordinate offset, in pixels, for the upper-left corner of the magnified view. The offset is relative to the upper-left corner of the primary monitor, in unmagnified coordinates. The minimum value of the parameter is -262144, and the maximum value is 262144.</param>
+        /// <returns>Returns TRUE if successful, or FALSE otherwise.</returns>
+        [DllImport(nameof(Magnification))]
+        [return: MarshalAs(UnmanagedType.Bool)]
+        public static extern bool MagSetFullscreenTransform(
+            float magLevel,
+            int xOffset,
+            int yOffset);
     }
 }

src/Magnification/PublicAPI.Unshipped.txt

@@ -21,6 +21,7 @@ static extern PInvoke.Magnification.MagGetWindowTransform(System.IntPtr hwnd, PI
 static extern PInvoke.Magnification.MagInitialize() -> bool
 static extern PInvoke.Magnification.MagSetColorEffect(System.IntPtr hwnd, PInvoke.Magnification.MAGCOLOREFFECT* pEffect) -> bool
 static extern PInvoke.Magnification.MagSetFullscreenColorEffect(PInvoke.Magnification.MAGCOLOREFFECT* pEffect) -> bool
+static extern PInvoke.Magnification.MagSetFullscreenTransform(float magLevel, int xOffset, int yOffset) -> bool
 static extern PInvoke.Magnification.MagSetWindowTransform(System.IntPtr hwnd, PInvoke.Magnification.MAGTRANSFORM* pTransform) -> bool
 static extern PInvoke.Magnification.MagShowSystemCursor(bool fShowCursor) -> bool
 static extern PInvoke.Magnification.MagUninitialize() -> bool