Mouse Screen Position and GUI Position not scaled together.

I have a matrix to scale the GUI according to the resolution the player selects. I have seen this code in many places, so I assume it works nearly flawlessly. Although, I have not been able to find anyone with a problem similar to mine.

My code:

Code (csharp):

1.  
2. float originalWidth = 1280;
3. float originalHeight = 720;
4. Vector3 scale;
5.  
6. void OnGUI()
7.     {
8.        
9.         scale.x = (float)Screen.width / originalWidth; // calculate hor scale
10.         scale.y = (float)Screen.height / originalHeight; // calculate vert scale
11.         scale.z = 1;
12.         Matrix4x4 svMat = GUI.matrix; // save current matrix
13.         // substitute matrix - only scale is altered from standard
14.         GUI.matrix = Matrix4x4.TRS(Vector3.zero, Quaternion.identity, scale);
15.         // draw your GUI controls here:
16.         Vector2 screenPos = Event.current.mousePosition;
17.         Vector2 convertedGUIPos = GUIUtility.ScreenToGUIPoint(screenPos);
18.         Debug.Log("Screen: " + screenPos + " GUI: " + convertedGUIPos);
19.         // restore matrix before returning
20.         GUI.matrix = svMat; // restore matrix
21.     }
22.  

Code (csharp):

1. Debug.Log("Screen: " + screenPos + " GUI: " + convertedGUIPos);

returns the following.

width: 1153 height: 649
Screen: (757.1, -56.6) GUI: (840.5, -62.8 )
Screen: (840.5, -62.8 ) GUI: (933.1, -69.6)

However, it scales from the top left with both Screen and GUI at 0,0 with the GUI gradually getting out of sync with the Screen.

The only time when both are scaled correctly is when the screen is 1280 720

If anyone has any quick solutions, that would be greatly appreciated. Although, I suppose at this point I would take a longer solution as well.

Edit:
Added another set of the screen print out as well as the current screen size.

 

10 years later, and I have the same problem as well. It seems like the gui.matrix will resize custom mouse cursors but not adjust the mouse.position. So raycasts may not go where you expect.