public MemImage Clone()
{
MemImage clone = new MemImage(Width, Height, this.array);
return clone;
}
private static void CropSlideImage(string imgPath, Options options)
{
Rectangle bounds;
using (MemoryStream ms = new MemoryStream(System.IO.File.ReadAllBytes(imgPath)))
{
var img = new MemImage(System.Drawing.Bitmap.FromStream(ms));
int left = 0;
int top = 0;
int right = img.Width - 1;
int bottom = img.Height - 1;
if (options.CropWidth)
{
// scan left side until we encounter a non white pixel
for (int i = 0; i < img.Width; i++)
{
if (!Enumerable.Range(0, img.Height).All(h => { var pd = img.GetPixel(i, h); return pd.R == 255 && pd.G == 255 && pd.B == 255; }))
{
left = i;
break;
}
}
// scan right side until we encounter a non white pixel
for (int i = img.Width - 1; i >= 0; i--)
{
if (!Enumerable.Range(0, img.Height).All(h => { var pd = img.GetPixel(i, h); return pd.R == 255 && pd.G == 255 && pd.B == 255; }))
{
right = i;
break;
}
}
left -= options.CropPadding;
right += options.CropPadding;
if (left < 0) left = 0;
if (right > img.Width - 1) right = img.Width - 1;
}
if (options.CropHeight)
{
// scan top side until we encounter a non white pixel
for (int i = 0; i < img.Height; i++)
{
if (!Enumerable.Range(0, img.Width).All(w => { var pd = img.GetPixel(w, i); return pd.R == 255 && pd.G == 255 && pd.B == 255; }))
{
top = i;
break;
}
}
// scan bottom side until we encounter a non white pixel
for (int i = img.Height - 1; i >= 0; i--)
{
if (!Enumerable.Range(0, img.Width).All(w => { var pd = img.GetPixel(w, i); return pd.R == 255 && pd.G == 255 && pd.B == 255; }))
{
bottom = i;
break;
}
}
top -= options.CropPadding;
bottom += options.CropPadding;
if (top < 0) top = 0;
if (bottom > img.Height - 1) bottom = img.Height - 1;
}
bounds = Rectangle.FromLTRB(left, top, right, bottom);
if (bounds.Left == 0 && bounds.Top == 0 && bounds.Width == img.Width - 1 && bounds.Bottom == img.Height - 1)
{
// nothing to crop
}
else
{
// crop & overwrite the original image
img = MemImage.Crop(img, bounds.X, bounds.Y, bounds.Width, bounds.Height);
using (var bmp = img.ToImage())
bmp.Save(imgPath, ImageFormat.Png);
}
}
}
public static MemImage Crop(MemImage input, int x, int y, int width, int height)
{
if (width <= 0 || height <= 0 || x < 0 || y < 0)
return null;
int iWidth = input.Width;
int iHeight = input.Height;
MemImage output = new MemImage(width, height);
int jMax = (y + height > iHeight ? iHeight : y + height);
int iMax = (x + width > iWidth ? iWidth : x + width);
for (int j = y; j < jMax; j++)
{
for (int i = x; i < iMax; i++)
{
PixelData pixelInput = input.GetPixel(i, j);
output.SetPixel(i - x, j - y, pixelInput);
}
}
return output;
}
