private Multistring RecognizeSingleLine(FastBitmap dest_bitmap, Rectangle dest_bounds, int font_color, out int max_height)
{
match_offsets.Clear();
max_height = 0;
int[] y_offsets = new int[dest_bounds.Width];
bool[] empty = new bool[dest_bounds.Width];
for (int x = 0; x < dest_bounds.Width; x++)
{
y_offsets[x] = -1;
for (int y = 0; y < dest_bounds.Height; y++)
{
if (dest_bitmap[dest_bounds.X + x, dest_bounds.Y + y] == font_color)
{
y_offsets[x] = y;
break;
}
}
if (y_offsets[x] < 0)
{
empty[x] = true;
}
}
int space_width = TextRenderer.MeasureText(" ", possible_fonts[0].Font).Width - TextRenderer.MeasureText(" ", possible_fonts[0].Font).Width;
if (space_width < 1)
{
space_width = 1;
}
//Console.WriteLine(space_width);
int current_x = 0;
int empty_cols = 0;
int wanted_match_offset = int.MinValue;
Multistring line_str = new Multistring();
while (current_x < dest_bounds.Width)
{
if (y_offsets[current_x] >= 0)
{
empty_cols = 0;
Rectangle bounds = dest_bounds;
bounds.X = dest_bounds.X + current_x;
bounds.Width = dest_bounds.Width - current_x;
List <FontChar> matches = GetMatches(dest_bitmap, bounds, font_color, wanted_match_offset, y_offsets, current_x);
if (matches.Count > 0)
{
// Remove the recognized character from the destination bitmap
dest_bitmap.BlitSingleColor(matches[0].Bitmap,
new Point(bounds.X, bounds.Y + match_offsets[matches[0].FontChars] + matches[0].CropRect.Y), matches[0].FontColor, (int)0x00FFFFFF);
// Update y-offsets after removing the recognized character
for (int x = 0; x < matches[0].Bitmap.Width; x++)
{
y_offsets[current_x + x] = -1;
for (int y = 0; y < dest_bounds.Height; y++)
{
if (dest_bitmap[bounds.X + x, dest_bounds.Y + y] == font_color)
{
y_offsets[current_x + x] = y;
break;
}
}
}
if (possible_fonts.Count > 1)
{
possible_fonts_lookup.Clear();
possible_fonts.Clear();
foreach (FontChar fc in matches)
{
possible_fonts_lookup[fc.FontChars] = true;
}
foreach (FontCharCollection font in possible_fonts_lookup.Keys)
{
possible_fonts.Add(font);
}
space_width = TextRenderer.MeasureText(" ", possible_fonts[0].Font).Width - TextRenderer.MeasureText(" ", possible_fonts[0].Font).Width;
if (space_width < 1)
{
space_width = 1;
}
}
List <char> possible_chars = new List <char>();
foreach (FontChar fc in matches)
{
if (match_offsets[fc.FontChars] + matches[0].RealHeight > max_height)
{
max_height = match_offsets[fc.FontChars] + matches[0].RealHeight;
}
if (!possible_chars.Contains(fc.Character))
{
possible_chars.Add(fc.Character);
}
}
line_str.Append(possible_chars);
}
}
else if (empty[current_x])
{
//Console.WriteLine("{0} empty", current_x);
empty_cols++;
if (empty_cols >= space_width)
{
line_str.Append(' ');
//Console.WriteLine("SPACE");
empty_cols = 0;
}
}
current_x++;
}
return(line_str);
}