使用C＃修改位图图像中像素的颜色时出错

Question

I have this code in which I try to modify the color of the pixel (x,y). I want to just get the Color given by Color.White - the color of the pixel (x,y)

  Bitmap  mPlan;
  for (int x=0; x < mPlanWidth; x++)
            {
                for (int y=0; y < mPlanHeight; y++)
                {
                    if (mPlan.GetPixel(x, y) == Color.White)
                     mPlan.SetPixel(x, y,  Color.White - mPlan.GetPixel(x, y));
                }

            }

But I have an error in the level of Color.White - mPlan.GetPixel(x, y) which tells me impossible conversion of int to Android.Graphics.Color

I Tried to convert all the colors to int using the Argb

   mPlan.SetPixel(x, y, System.Drawing.Color.FromArgb(System.Drawing.Color.White.ToArgb()- mFloorPlan.GetPixel(x, y))   );

But the methods TpArgb are given only by the assembly System.Drawing and SetPixel take as third parametre a color of Android.Graphics So I have this conflict of types.

Answer 1

Bitmap bc;
Color color = new Color();
color.R = Color.White.R - bc.GetPixel(x, y).R;
color.G = Color.White.G - bc.GetPixel(x, y).G;
color.B = Color.White.B - bc.GetPixel(x, y).B;
bc.SetPixel(x, y, color);

Generate new color by setting the RGB value of the new color.