/// <summary>
/// Get glyph's size by graphics.MeasureString().
/// Then shrink glyph's size.
/// xoffset now means offset in a single glyph's bitmap.
/// </summary>
/// <param name="fontBitmap"></param>
/// <param name="charSet"></param>
/// <param name="singleCharWidth"></param>
/// <param name="singleCharHeight"></param>
private static void PrepareInitialGlyphDict(FontBitmap fontBitmap, string charSet, out int singleCharWidth, out int singleCharHeight)
{
// Get glyph's size by graphics.MeasureString().
{
int maxWidth = 0, maxHeight = 0;
float fontSize = fontBitmap.GlyphFont.Size;
using (var bitmap = new Bitmap(1, 1, PixelFormat.Format24bppRgb))
{
using (Graphics graphics = Graphics.FromImage(bitmap))
{
foreach (char c in charSet)
{
SizeF size = graphics.MeasureString(c.ToString(), fontBitmap.GlyphFont);
var info = new GlyphInfo(0, 0, (int)size.Width, (int)size.Height);
fontBitmap.GlyphInfoDictionary.Add(c, info);
if (maxWidth < (int)size.Width) { maxWidth = (int)size.Width; }
if (maxHeight < (int)size.Height) { maxHeight = (int)size.Height; }
}
}
}
singleCharWidth = maxWidth;
singleCharHeight = maxHeight;
}
// shrink glyph's size.
// xoffset now means offset in a single glyph's bitmap.
{
using (var bitmap = new Bitmap(singleCharWidth, singleCharHeight))
{
using (var graphics = Graphics.FromImage(bitmap))
{
Color clearColor = Color.FromArgb(0, 0, 0, 0);
foreach (KeyValuePair<char, GlyphInfo> item in fontBitmap.GlyphInfoDictionary)
{
if (item.Key == ' ' || item.Key == '\t' || item.Key == '\r' || item.Key == '\n') { continue; }
graphics.Clear(clearColor);
graphics.DrawString(item.Key.ToString(), fontBitmap.GlyphFont, Brushes.White, 0, 0);
BitmapData data = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height), ImageLockMode.ReadOnly, PixelFormat.Format24bppRgb);
RetargetGlyphRectangleInwards(data, item.Value);
bitmap.UnlockBits(data);
}
}
}
}
}
/// <summary>
/// shrink glyph's width to fit in exactly.
/// </summary>
/// <param name="bitmapData"></param>
/// <param name="glyph"></param>
private static void RetargetGlyphRectangleInwards(BitmapData bitmapData, GlyphInfo glyph)
{
int startX, endX;
{
bool done = false;
for (startX = glyph.xoffset; startX < bitmapData.Width; startX++)
{
for (int j = glyph.yoffset; j < glyph.yoffset + glyph.height; j++)
{
if (!IsEmptyPixel(bitmapData, startX, j))
{
done = true;
break;
}
}
if (done) { break; }
}
}
{
bool done = false;
for (endX = glyph.xoffset + glyph.width - 1; endX >= 0; endX--)
{
for (int j = glyph.yoffset; j < glyph.yoffset + glyph.height; j++)
{
if (!IsEmptyPixel(bitmapData, endX, j))
{
done = true;
break;
}
}
if (done) { break; }
}
}
if (endX < startX)
{
//startX = endX = glyph.xoffset;
glyph.width = 0;
}
else
{
glyph.xoffset = startX;
glyph.width = endX - startX + 1;
}
}
/// <summary>
///
/// </summary>
/// <param name="characters"></param>
/// <param name="result"></param>
/// <returns></returns>
public bool GetGlyphInfo(string characters, out GlyphInfo result)
{
return(this.dictionary.TryGetValue(characters, out result));
}
/// <summary>
///
/// </summary>
/// <param name="character"></param>
/// <param name="result"></param>
/// <returns></returns>
public bool GetGlyphInfo(char character, out GlyphInfo result)
{
return(this.dictionary.TryGetValue(character.ToString(), out result));
}
