private void RebuildVisualOffsets()
{
// 本来是打算用一个数组存储偏移，但是实际上很多字符之间的偏移是一样的，为了节省内存这里定义一种新的结构。
CharacterVisualOffsets.Clear();
if (Line.Length == 0)
{
return;
}
String text = Document.GetLineText(Line);
foreach (var elem in Elements)
{
GlyphTypeface globalGlyphTypeface = TypefaceGenerator.GetInstance().GenerateGlyphTypeface(new FontFamily("Microsoft YaHei"), elem.FontStyle, elem.FontWeight, elem.FontStretch);
GlyphTypeface glyphTypeface = TypefaceGenerator.GetInstance().GenerateGlyphTypeface(Owner.GlyphOption.FontFamily, elem.FontStyle, elem.FontWeight, elem.FontStretch);
for (int i = 0; i < elem.Length; i++)
{
Char ch = text[elem.RelativeOffset + i];
UInt16 indice;
Double width;
if (glyphTypeface.CharacterToGlyphMap.ContainsKey(ch))
{
indice = glyphTypeface.CharacterToGlyphMap[ch];
width = glyphTypeface.AdvanceWidths[indice] * Owner.GlyphOption.FontSize;
}
else
{
indice = globalGlyphTypeface.CharacterToGlyphMap[ch];
width = globalGlyphTypeface.AdvanceWidths[indice] * Owner.GlyphOption.FontSize;
}
CharacterVisualOffsets.Add(width);
}
}
}
public static TypefaceGenerator GetInstance()
{
if (_instance == null)
{
_instance = new TypefaceGenerator();
}
return(_instance);
}
public void GenerateTypeface(FontFamily fontFamily, Int32 fontSize, Double lineHeight)
{
if (fontFamily == null)
{
throw new ArgumentNullException("fontFamily");
}
_glyphTypeface = TypefaceGenerator.GetInstance().GenerateGlyphTypeface(fontFamily, FontStyle, FontWeight, FontStretch);
_globalGlyphTypeface = TypefaceGenerator.GetInstance().GenerateGlyphTypeface(new FontFamily("Microsoft YaHei"), FontStyle, FontWeight, FontStretch);
_fontSize = fontSize;
_lineHeight = lineHeight;
}
