private char getBestCharForSection(Bitmap section)
{
char ret = new char();
Bitmap quadrant = new Bitmap(section.Width / _horizResolution, section.Height / _vertResolution);
Rectangle fullQuadrant = new Rectangle(0, 0, quadrant.Width, quadrant.Height);
Graphics g = Graphics.FromImage(quadrant);
byte[] sectionDarknessMap = new byte[_horizResolution * _vertResolution];
int d = 0;
Debug.Write("Darkness map:");
for (int y = 0; y < _vertResolution; y++)
{
for (int x = 0; x < _horizResolution; x++)
{
Rectangle srcRect = new Rectangle((section.Width * x) / _horizResolution, (section.Height * y) / _vertResolution, quadrant.Width, quadrant.Height);
g.FillRectangle(Brushes.White, fullQuadrant);
g.DrawImage(section, fullQuadrant, srcRect, GraphicsUnit.Pixel);
g.Flush();
sectionDarknessMap[d] = quadrant.GetDarkness();
Debug.Write(" " + sectionDarknessMap[d]);
d++;
}
}
Debug.WriteLine("");
Debug.Write("Closest character - '");
char leastWrong = ' ';
int leastWrongness = int.MaxValue;
foreach (var charDarknessMap in _characterDarknessMaps)
{
var thisWrongness = mapWrongness(sectionDarknessMap, charDarknessMap.Darknesses);
if (thisWrongness < leastWrongness)
{
leastWrong = charDarknessMap.Character;
leastWrongness = thisWrongness;
}
}
ret = leastWrong;
Debug.WriteLine(ret + "'");
return ret;
}
private void generateCharacterDarknessMaps()
{
//TODO make this multithreaded
var ret = new List<CharacterDarknessMap>();
Debug.WriteLine("Generating Character Darkness Maps");
//TODO figure out a better way to get the dimensions of this font
Bitmap a = new Bitmap(1000, 1000);
Graphics charG = Graphics.FromImage(a);
Debug.WriteLine("Creating character buffer image...");
Bitmap charBuffer = new Bitmap((int)charG.MeasureString("M", _chosenFont).Width, (int)charG.MeasureString("M", _chosenFont).Height);
Debug.WriteLine("Buffer image is " + charBuffer.Width + "x" + charBuffer.Height);
Debug.WriteLine("Creating character quadrant buffer image...");
Bitmap charQuadBuffer = new Bitmap(charBuffer.Width / _horizResolution, charBuffer.Height / _vertResolution);
Graphics quadG = Graphics.FromImage(charQuadBuffer);
Debug.WriteLine("Character Quadrang buffer image is " + charQuadBuffer.Width + "x" + charQuadBuffer.Height);
charG = Graphics.FromImage(charBuffer);
charG.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
charG.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
charG.PixelOffsetMode = System.Drawing.Drawing2D.PixelOffsetMode.HighQuality;
foreach (char iChar in _characterPool)
{
Debug.WriteLine("Analyzing '" + iChar + "'");
Debug.WriteLine("Painting '" + iChar + "' to buffer image...");
charG.FillRectangle(Brushes.White, 0, 0, charBuffer.Width, charBuffer.Height);
charG.DrawString(iChar.ToString(), _chosenFont, Brushes.Black, 0, 0);
charG.Flush();
CharacterDarknessMap dm = new CharacterDarknessMap { Character = iChar };
byte[] darknessMap = new byte[_vertResolution * _horizResolution];
int d = 0;
for (int y = 0; y < _vertResolution; y++)
{
for (int x = 0; x < _horizResolution; x++)
{
Debug.WriteLine("Analyzing character quadrant " + x + "," + y);
var destRect = new Rectangle(0, 0, charQuadBuffer.Width, charQuadBuffer.Height);
var srcRect = new Rectangle((charBuffer.Width * x) / _horizResolution, (charBuffer.Height * y) / _vertResolution, charQuadBuffer.Width, charQuadBuffer.Height);
quadG.DrawImage(charBuffer, destRect, srcRect, GraphicsUnit.Pixel);
quadG.Flush();
byte quadrantDarkness = charQuadBuffer.GetDarkness();
Debug.WriteLine("Darkness: " + quadrantDarkness);
darknessMap[d] = quadrantDarkness;
d++;
}
}
dm.Darknesses = darknessMap;
ret.Add(dm);
}
Debug.WriteLine("Normalizing Character Darkness Maps");
byte highestOriginal = 0;
foreach (var map in ret)
{
highestOriginal = Math.Max(map.Darknesses.Max(), highestOriginal);
}
Debug.WriteLine("Highest darkness was " + highestOriginal);
decimal stretchFactor = ((decimal)255 / (decimal)highestOriginal);
Debug.WriteLine("Stretching each value by a factor of " + stretchFactor);
foreach (var map in ret)
{
Debug.Write("'" + map.Character + "' -");
for (int i = 0; i < map.Darknesses.Length; i++)
{
map.Darknesses[i] = (byte)(map.Darknesses[i] * stretchFactor);
Debug.Write(" " + map.Darknesses[i].ToString("D3"));
}
Debug.WriteLine("");
}
_characterDarknessMaps = ret;
_charactersReady = true;
}