public void modify(FileInfo file)
{
Bitmap bitmap = null;
AppendContent appendContent = null;
AppendContentBuilder builder = AppendContentBuilder.ParseFile(file) ?? new AppendContentBuilder();
try
{
using (var fs = file.OpenRead())
{
bitmap = new Bitmap(fs);
}
Random random = new Random((int)DateTime.Now.Ticks);
for (int i = 0; i < 2048 * 2048; i++)
{
var x = random.Next(bitmap.Width);
var y = random.Next(bitmap.Height);
var pixel = bitmap.GetPixel(x, y);
if (pixel.ToArgb() != Color.Transparent.ToArgb())
{
if (pixel.A > 125)
{
bitmap.SetPixel(x, y, Color.FromArgb(pixel.A - random.Next(1, 3), pixel));
}
else
{
bitmap.SetPixel(x, y, Color.FromArgb(pixel.A + random.Next(1, 3), pixel));
}
appendContent = new AppendContent {
X = x, Y = y, Color = pixel.ToArgb()
};
break;
}
}
bitmap.Save(file.FullName);
}
catch (Exception ex)
{
}
finally
{
if (bitmap != null)
{
bitmap.Dispose();
}
}
if (appendContent != null)
{
builder.Contents.Add(appendContent);
AppendContentBuilder.AddContent2File(file.FullName, builder.Contents);
}
//var png = new Png(file);
//png.AddInternationalText("comment", "hello " + DateTime.Now.Ticks);
//png.SaveFile();
}
public void recovery(FileInfo file)
{
Bitmap bitmap = null;
var filebuffer = File.ReadAllBytes(file.FullName);
var builder = AppendContentBuilder.ParseFile(filebuffer);
if (builder == null)
{
return;
}
bool success = false;
try
{
using (var fs = file.OpenRead())
{
bitmap = new Bitmap(fs);
}
foreach (var apcnt in builder.Contents)
{
bitmap.SetPixel(apcnt.X, apcnt.Y, Color.FromArgb(apcnt.Color));
}
bitmap.Save(file.FullName);
success = true;
}
catch (Exception ex)
{
}
finally
{
if (bitmap != null)
{
bitmap.Dispose();
}
}
if (success)
{
AppendContentBuilder.RemoveContentfromFile(file.FullName);
}
}
