public string Patch()
{
if (!CheckCorrectInternal(_image))
{
return("Invalid settings!");
}
var newImage = _image.Image.ToArray();
var diff = 0;
for (var i = 0; i < 10; ++i)
{
var currentArray = i % 2 == 0 ? OnLevels : OffLevels;
var newValue = currentArray[i / 2];
foreach (var offset in _image.TableOffsets)
{
diff += newValue - newImage[offset + i];
newImage[offset + i] = checked ((byte)newValue);
}
}
var alignmentOffset = ImageMarkup.CopyrightOffset + ImageMarkup.CopyrightString.Count - 2;
diff -= newImage[alignmentOffset];
diff -= newImage[alignmentOffset + 1];
newImage[alignmentOffset] = 0;
var modulo = (byte)(256 - unchecked ((uint)diff) % 256);
newImage[alignmentOffset + 1] = modulo;
diff += modulo;
_bitConverter.WriteInt(_image.Checksum + diff, newImage, ImageMarkup.CheckSumOffset);
try
{
var unused = _controllerImageCreator(newImage);
}
catch
{
return("Internal error");
}
try
{
// ReSharper disable once AssignNullToNotNullAttribute
File.WriteAllBytes(_outFileName, newImage);
}
catch (Exception e)
{
return($"Unable to write patched image: {e}");
}
return("Image patched successfully");
}
