public WriteableBitmap GetImageFromText(string text, int maxWidth = 800, int lineHeight = 0)
{
if (string.IsNullOrEmpty(text) || CharCount == 0)
{
return(null);
}
else
{
int textWidth = 0;
int actualWidth = 0;
int textLine = 1;
WriteableBitmap resultBmp = null;
foreach (char c in text)
{
textWidth += BitmapCharDic[c].CharImage.PixelWidth;
}
if (textWidth <= maxWidth)
{
resultBmp = GetSubStringBitmap(text, lineHeight);
}
else
{
int i = 0;
int j = 0;
int minWidth = 0;
textWidth = 0;
int textHeight = LineHeight;
if (lineHeight > 0)
{
textHeight = lineHeight;
}
List <string> listSubString = new List <string>();
for (i = 0; i < text.Length; i++)
{
actualWidth = textWidth;
textWidth += BitmapCharDic[text[i]].CharImage.PixelWidth;
if (textWidth > maxWidth)
{
string s = text.Substring(j, i - j - 1);
j = i - 1;
listSubString.Add(s);
if (actualWidth > minWidth)
{
minWidth = actualWidth;
}
textWidth = BitmapCharDic[text[i]].CharImage.PixelWidth;
}
}
string lastSubStr = text.Substring(j);
listSubString.Add(lastSubStr);
textLine = listSubString.Count;
resultBmp = new WriteableBitmap(minWidth, textLine * textHeight);
for (i = 0; i < listSubString.Count; i++)
{
string s = listSubString[i];
WriteableBitmap wrTmp = GetSubStringBitmap(s, textHeight);
int offset = (minWidth - wrTmp.PixelWidth) / 2;
BitmapUtils.PasteBitmap(ref resultBmp, offset, i * textHeight, wrTmp);
}
}
return(resultBmp);
}
}
