c# Draw image to screen for a minimap

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I am attempting to create a game overlay, One of the final touches is converting the 2d radar into a radar and a minimap Before I worry about getting a sub-image that encompasses a small portion of the original image centered at my location i need to first properly draw the image in my radar.

The code for my working 2d radar is:

if (ShowRadar)
{
    //background             
    //DrawFilledBox(this.GameWindowRect.Right - 225, this.GameWindowRect.Top + 50, 201f, 201f, Color.DarkOliveGreen, RadarTransparency);
    //Draw radar Border
    DrawBoxAbs(this.GameWindowRect.Right - 225, this.GameWindowRect.Top + 50, 201f, 201f, 1f, Color.Black);
    //Draw radar axis
    DrawLine(this.GameWindowRect.Right - 125, this.GameWindowRect.Top + 50, this.GameWindowRect.Right - 125, this.GameWindowRect.Top + 251, 1f, Color.Black);
    DrawLine(this.GameWindowRect.Right - 225, this.GameWindowRect.Top + 150, this.GameWindowRect.Right - 24, this.GameWindowRect.Top + 150, 1f, Color.Black);
    //Center point
    RadarCenter = new Vector2(this.GameWindowRect.Right - 125, this.GameWindowRect.Top + 125 + 25);
    DrawFilledBox(RadarCenter.X - 1f, RadarCenter.Y - 1f, 3f, 3f, Color.White);
    //draw the map in radar
    DrawImage(this.GameWindowRect.Right - 225f, this.GameWindowRect.Top + 50f, 201f, 201f, RadarTransparency);
   
    if (RadarCenter.Length() > 0f)
    {
        //Display each entity in correct relational position
        foreach (ENTITY entity in Entity)
        {
            Vector2 pointToRotate = new Vector2(entity.Pos.X, entity.Pos.Z);
            Vector2 vector3 = new Vector2(player_X, player_Z);
            pointToRotate = vector3 - pointToRotate;
            float num30 = pointToRotate.Length() * 0.5f;
            num30 = Math.Min(num30, 90f);
            pointToRotate.Normalize();
            pointToRotate = (Vector2)(pointToRotate * num30);
            pointToRotate += RadarCenter;
            pointToRotate = RotatePoint(pointToRotate, RadarCenter, player_D, true);
            if (entity.Type == 0x04 && RadarPlayers)
            {
                DrawFilledBox(pointToRotate.X, pointToRotate.Y, 3f, 3f, Color.SkyBlue);
            }
            if ((entity.Type == 0x0C || entity.Type == 0x14 || entity.Type == 0x50 || entity.Type == 0x5b) && RadarAggressive)
            {
                DrawFilledBox(pointToRotate.X, pointToRotate.Y, 3f, 3f, Color.Red);
            }
            if ((entity.Type == 0x13 || entity.Type == 0x55) && RadarAnimals)
            {
                DrawFilledBox(pointToRotate.X, pointToRotate.Y, 3f, 3f, Color.LightGreen);
            }
            if ((entity.Type == 0x11 || entity.Type == 0x72 || entity.Type == 0x76) && RadarVehicles)
            {
                DrawFilledBox(pointToRotate.X, pointToRotate.Y, 3f, 3f, Color.HotPink);
            }
        }
    }
}

And the code to draw the image is:

#region DrawImage
public static void DrawImage(float x, float y, float w, float h, int alpha = 255)
{
  if (System.IO.File.Exists("map.png"))
  {

    Bitmap bmp = new Bitmap("map.png");
    GFX = Graphics.FromImage(bmp);
    Rectangle destRect = new Rectangle((int)x, (int)y, (int)w, (int)h);
    GFX.DrawImage(bmp, destRect);
  }
}
#endregion

Again the radar itself is working 100%, Although I aim to use an image as the background instead of a solid colour which is what I am struggling with.

asked 54 secs ago

Slow Motion

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c# Draw image to screen for a minimap