private void Load(string path)
{
//Create temp directory
if (Directory.Exists("TempFontStorage"))
{
Directory.Delete("TempFontStorage", true);
}
Directory.CreateDirectory("TempFontStorage");
//Extract zip
try
{
ZipFile.ExtractToDirectory(path, "TempFontStorage");
}
catch (InvalidDataException e)
{
throw new FontLoadingException("Couldn't unpack zip", e);
}
//Load images
string[] folders = Directory.GetDirectories("TempFontStorage");
foreach (string folder in folders)
{
FChar key = (FChar)Enum.Parse(typeof(FChar), Path.GetFileName(folder));
List <Bitmap> value = new List <Bitmap>();
string[] imagePaths = Directory.GetFiles(folder);
foreach (string imagePath in imagePaths)
{
Bitmap loadedBitmap;
using (Bitmap bitmap = BitmapUtils.LoadBitmap(imagePath))
{
loadedBitmap = new Bitmap(bitmap);
}
value.Add(loadedBitmap);
}
images.Add(key, value);
}
//Load margins
XElement file = XElement.Load("TempFontStorage/margins.xml");
var leftPairs = file.Descendants().Where((x) => x.Name == "leftMargins").First().Descendants().Where((elem) => elem.Name == "pair");
leftMargins = new Dictionary <FChar, List <double> >();
foreach (XElement pair in leftPairs)
{
FChar key = (FChar)Enum.Parse(typeof(FChar), pair.Attribute("key").Value);
if (!leftMargins.ContainsKey(key))
{
leftMargins.Add(key, new List <double>());
}
leftMargins[key].AddRange(pair.Descendants().Select((item) => double.Parse(item.Attribute("value").Value, CultureInfo.InvariantCulture)));
}
var rightPairs = file.Descendants().Where((x) => x.Name == "rightMargins").First().Descendants().Where((elem) => elem.Name == "pair");
rightMargins = new Dictionary <FChar, List <double> >();
foreach (XElement pair in rightPairs)
{
FChar key = (FChar)Enum.Parse(typeof(FChar), pair.Attribute("key").Value);
if (!rightMargins.ContainsKey(key))
{
rightMargins.Add(key, new List <double>());
}
rightMargins[key].AddRange(pair.Descendants().Select((item) => double.Parse(item.Attribute("value").Value, CultureInfo.InvariantCulture)));
}
//Delete temp directory
if (Directory.Exists("TempFontStorage"))
{
Directory.Delete("TempFontStorage", true);
}
}
private void CreateSmallExpandedBW(Bitmap smallForm)
{
smallBWForm = BitmapUtils.MakeBlackAndWhite(smallForm, BWThreshold);
smallBWForm = BitmapUtils.ExpandWhite(smallBWForm);
}
/// <summary>
/// Fills result list with points belonging to the component
/// </summary>
private static void TraverseConnectedComponentDFS(List <Vector> result, Bitmap map, Bitmap visited, int x, int y, int threshold)
{
if (x < 0 || x >= map.Width || y < 0 || y >= map.Height || IsVisited(visited, x, y) || !BitmapUtils.IsBelowThreshold(map, x, y, threshold))
{
return;
}
result.Add(new Vector(x, y));
if (result.Count > 2000)
{
throw new MarkersNotFoundException("Couldn't traverse one of the markers: for some reason it is too large.");
}
visited.SetPixel(x, y, Color.Red);
TraverseConnectedComponentDFS(result, map, visited, x + 1, y, threshold);
TraverseConnectedComponentDFS(result, map, visited, x, y + 1, threshold);
TraverseConnectedComponentDFS(result, map, visited, x - 1, y, threshold);
TraverseConnectedComponentDFS(result, map, visited, x, y - 1, threshold);
}
private void FindCoreRegion()
{
int[] histogram = new int[Font.imagePixelH];
foreach (FChar letter in smallLetters)
{
for (int i = 0; i < font.images[letter].Count; i++)
{
Bitmap image = font.images[letter][i];
BitmapData data = image.LockBits(new Rectangle(0, 0, image.Width, image.Height), ImageLockMode.ReadOnly, image.PixelFormat);
unsafe
{
byte *arr = (byte *)data.Scan0;
int channelCount = Bitmap.GetPixelFormatSize(image.PixelFormat) / 8;
for (int j = 0; j < image.Width * image.Height * channelCount; j += channelCount)
{
if (BitmapUtils.GetGrayscale(arr[j], arr[j + 1], arr[j + 2]) < 128 && arr[j + 3] > 240)
{
histogram[j / channelCount / image.Width]++;
}
}
}
image.UnlockBits(data);
}
}
int[] cumulativeHistogram = new int[Font.imagePixelH];
cumulativeHistogram[0] = histogram[0];
for (int i = 1; i < cumulativeHistogram.Length; i++)
{
cumulativeHistogram[i] = cumulativeHistogram[i - 1] + histogram[i];
}
double cutoffRatio = 0.05;
int total = cumulativeHistogram.Last();
int leftBorder = 0;
for (int i = 0; i < cumulativeHistogram.Length; i++)
{
if ((double)cumulativeHistogram[i] / total > cutoffRatio)
{
leftBorder = i;
break;
}
}
int rightBorder = cumulativeHistogram.Length;
for (int i = cumulativeHistogram.Length - 1; i >= 0; i--)
{
if ((double)cumulativeHistogram[i] / total < (1.0 - cutoffRatio))
{
rightBorder = i;
break;
}
}
coreRegionTop = leftBorder * Font.cmPerPixelV;
coreRegionBottom = rightBorder * Font.cmPerPixelV;
}