public unsafe static Color GetColor(this BitmapData data, int x, int y)
{
bool alpha = data.HasAlpha();
byte *ptr = data.PtrAt(x, y);
if (alpha)
{
return(Color.FromArgb(ptr[3], ptr[2], ptr[1], ptr[0]));
}
else
{
return(Color.FromArgb(ptr[2], ptr[1], ptr[0]));
}
}
public unsafe static bool MatchesColor(this BitmapData data, int x, int y, Color color)
{
bool alpha = data.HasAlpha();
byte *ptr = data.PtrAt(x, y);
if (alpha)
{
return(color.R == ptr[2] && color.G == ptr[1] &&
color.B == ptr[0] && color.A == ptr[3]);
}
else
{
return(color.R == ptr[2] && color.G == ptr[1] &&
color.B == ptr[0] && color.A == 255);
}
}
public unsafe static void SetColor(this BitmapData data, int x, int y, Color color)
{
bool alpha = data.HasAlpha();
byte *ptr = data.PtrAt(x, y);
if (alpha)
{
ptr[2] = color.R;
ptr[1] = color.G;
ptr[0] = color.B;
ptr[3] = color.A;
}
else
{
ptr[2] = color.R;
ptr[1] = color.G;
ptr[0] = color.B;
}
}
private unsafe static byte *PtrAt(this BitmapData data, Point point) => data.PtrAt(point.X, point.Y);