public static Bitmap Pad(Bitmap image, int newWidth, int newHeight)
{
int width = image.Width;
int height = image.Height;
/*
* It is always guaranteed that,
*
* width < newWidth
*
* and
*
* height < newHeight
*/
if ((width < newWidth && height < newHeight) ||
(width < newWidth && height == newHeight) ||
(width == newWidth && height < newHeight))
{
Bitmap paddedImage = Grayscale.CreateGrayscaleImage(newWidth, newHeight);
BitmapLocker inputImageLocker = new BitmapLocker(image);
BitmapLocker paddedImageLocker = new BitmapLocker(paddedImage);
inputImageLocker.Lock();
paddedImageLocker.Lock();
int startPointX = (int)Math.Ceiling((double)(newWidth - width) / (double)2) - 1;
int startPointY = (int)Math.Ceiling((double)(newHeight - height) / (double)2) - 1;
for (int y = startPointY; y < (startPointY + height); y++)
{
for (int x = startPointX; x < (startPointX + width); x++)
{
int xxx = x - startPointX;
int yyy = y - startPointY;
paddedImageLocker.SetPixel(x, y, inputImageLocker.GetPixel(xxx, yyy));
string str = string.Empty;
}
}
paddedImageLocker.Unlock();
inputImageLocker.Unlock();
return(paddedImage);
}
else if (width == newWidth && height == newHeight)
{
return(image);
}
else
{
throw new Exception("Pad() -- threw an exception");
}
}
public static Bitmap Fill(Bitmap image, Color fill)
{
BitmapLocker locker = new BitmapLocker(image);
locker.Lock();
for (int j = 0; j < image.Height; j++)
{
for (int i = 0; i < image.Width; i++)
{
locker.SetPixel(i, j, fill);
}
}
locker.Unlock();
return(image);
}