/// <summary>
/// 用一个纹理绘制指定范围内的所有可见字符
/// </summary>
/// <param name="ttfFullname"></param>
/// <param name="fontHeight">此值越大，绘制文字的清晰度越高，但占用的纹理资源就越多。</param>
/// <param name="firstChar"></param>
/// <param name="lastChar"></param>
/// <param name="maxTextureWidth">生成的纹理的最大宽度。</param>
/// <returns></returns>
public static IEnumerable <TTFTextureYeildingState> GetTTFTexture(
string ttfFullname, int fontHeight, int maxTextureWidth, char firstChar, char lastChar)
{
FreeTypeLibrary library = new FreeTypeLibrary();
FreeTypeFace face = new FreeTypeFace(library, ttfFullname);
Dictionary <char, CharacterInfo> charInfoDict = null;
int textureWidth = 0, textureHeight = 0;
System.Drawing.Bitmap bigBitmap = null;
foreach (var item in GetTextureBlueprint(face, fontHeight, maxTextureWidth, firstChar, lastChar))
{
charInfoDict = item.dict;
textureWidth = item.textureWidth;
textureHeight = item.textureHeight;
yield return(item);
}
if (textureWidth == 0)
{
textureWidth = 1;
}
if (textureHeight == 0)
{
textureHeight = 1;
}
foreach (var item in GetBigBitmap(face, fontHeight, maxTextureWidth,
firstChar, lastChar, charInfoDict, textureWidth, textureHeight))
{
bigBitmap = item.bigBitmap;
yield return(item);
}
face.Dispose();
library.Dispose();
var result = new FontTexture()
{
TtfFullname = ttfFullname,
FontHeight = fontHeight,
FirstChar = firstChar,
LastChar = lastChar,
BigBitmap = bigBitmap,
CharInfoDict = charInfoDict,
};
FileInfo fileInfo = new FileInfo(ttfFullname);
yield return(new TTFTextureYeildingState()
{
percent = 100,
ttfTexture = result,
message = string.Format("got font texture for {0}", fileInfo.Name),
});
}
/// <summary>
/// 用一个纹理绘制指定范围内的所有可见字符
/// </summary>
/// <param name="ttfFullname"></param>
/// <param name="fontHeight">此值越大，绘制文字的清晰度越高，但占用的纹理资源就越多。</param>
/// <param name="firstChar"></param>
/// <param name="lastChar"></param>
/// <param name="maxTextureWidth">生成的纹理的最大宽度。</param>
/// <returns></returns>
public static FontTexture GetTTFTexture(string ttfFullname, int fontHeight, int maxTextureWidth, char firstChar, char lastChar)
{
FreeTypeLibrary library = new FreeTypeLibrary();
FreeTypeFace face = new FreeTypeFace(library, ttfFullname);
Dictionary <char, CharacterInfo> charInfoDict;
int textureWidth, textureHeight;
GetTextureBlueprint(face, fontHeight, maxTextureWidth, firstChar, lastChar, out charInfoDict, out textureWidth, out textureHeight);
if (textureWidth == 0)
{
textureWidth = 1;
}
if (textureHeight == 0)
{
textureHeight = 1;
}
System.Drawing.Bitmap bigBitmap = GetBigBitmap(face, fontHeight, maxTextureWidth, firstChar, lastChar, charInfoDict, textureWidth, textureHeight);
face.Dispose();
library.Dispose();
var result = new FontTexture()
{
TtfFullname = ttfFullname, FontHeight = fontHeight, FirstChar = firstChar, LastChar = lastChar, BigBitmap = bigBitmap, CharInfoDict = charInfoDict,
};
return(result);
}
/// <summary>
/// 根据已经生成的贴图和附带的Xml配置文件得到一个<see cref="FontTexture"/>。
/// <para>此贴图和Xml文件</para>
/// </summary>
/// <param name="textureFullname"></param>
/// <param name="xmlFullname"></param>
/// <returns></returns>
public static FontTexture GetTTFTexture(string textureFullname, string xmlFullname)
{
XElement ttfTextureElement = XElement.Load(xmlFullname); //new XElement(xmlFullname);
FontTexture result = Parse(ttfTextureElement);
System.Drawing.Bitmap bigBitmap = new System.Drawing.Bitmap(textureFullname);
result.BigBitmap = bigBitmap;
return(result);
}
public static XElement ToXElement(this FontTexture texture)
{
XElement result = new XElement(strTTFTexture,
new XAttribute(strFontHeight, texture.FontHeight),
new XAttribute(strFirstChar, (int)texture.FirstChar),
new XAttribute(strLastChar, (int)texture.LastChar),
texture.CharInfoDict.ToXElement());
return(result);
}
private static FontTexture Parse(XElement xElement)
{
FontTexture result = new FontTexture();
result.FontHeight = int.Parse(xElement.Attribute(strFontHeight).Value);
result.FirstChar = (char)int.Parse(xElement.Attribute(strFirstChar).Value);
result.LastChar = (char)int.Parse(xElement.Attribute(strLastChar).Value);
result.CharInfoDict = CharacterInfoDictHelper.Parse(
xElement.Element(CharacterInfoDictHelper.strCharacterInfoDict));
return(result);
}
