/// <summary>
/// get from cache or create a new one
/// </summary>
/// <param name="reqFont"></param>
/// <returns></returns>
public SimpleFontAtlas GetFontAtlas(RequestFont reqFont, out GLBitmap glBmp)
{
#if DEBUG
_dbugStopWatch.Reset();
_dbugStopWatch.Start();
#endif
int fontKey = reqFont.FontKey;
SimpleFontAtlas fontAtlas;
if (!_createdAtlases.TryGetValue(fontKey, out fontAtlas))
{
//check from pre-built cache (if availiable)
Typeface resolvedTypeface = textServices.ResolveTypeface(reqFont);
string fontTextureFile = reqFont.Name + " " + fontKey;
string resolveFontFile = fontTextureFile + ".info";
string fontTextureInfoFile = resolveFontFile;
string fontTextureImg = fontTextureInfoFile + ".png";
if (StorageService.Provider.DataExists(fontTextureInfoFile))
{
SimpleFontAtlasBuilder atlasBuilder2 = new SimpleFontAtlasBuilder();
using (System.IO.Stream dataStream = StorageService.Provider.ReadDataStream(fontTextureInfoFile))
{
try
{
fontAtlas = atlasBuilder2.LoadAtlasInfo(dataStream);
fontAtlas.TotalGlyph = ReadGlyphImages(fontTextureImg);
fontAtlas.OriginalFontSizePts = reqFont.SizeInPoints;
_createdAtlases.Add(fontKey, fontAtlas);
//
//calculate some commonly used values
fontAtlas.SetTextureScaleInfo(
resolvedTypeface.CalculateScaleToPixelFromPointSize(fontAtlas.OriginalFontSizePts),
resolvedTypeface.CalculateScaleToPixelFromPointSize(reqFont.SizeInPoints));
//TODO: review here, use scaled or unscaled values
fontAtlas.SetCommonFontMetricValues(
resolvedTypeface.Ascender,
resolvedTypeface.Descender,
resolvedTypeface.LineGap,
resolvedTypeface.CalculateRecommendLineSpacing());
}
catch (Exception ex)
{
throw ex;
}
}
}
else
{
GlyphImage totalGlyphsImg = null;
SimpleFontAtlasBuilder atlasBuilder = null;
var textureGen = new GlyphTextureBitmapGenerator();
textureGen.CreateTextureFontFromScriptLangs(
resolvedTypeface,
reqFont.SizeInPoints,
_textureKind,
_textureBuildDetails,
(glyphIndex, glyphImage, outputAtlasBuilder) =>
{
if (outputAtlasBuilder != null)
{
//finish
atlasBuilder = outputAtlasBuilder;
}
}
);
//
totalGlyphsImg = atlasBuilder.BuildSingleImage();
//if (reqFont.SizeInPoints == 14 && cacheImg != null)
//{
// totalGlyphsImg = cacheImg;
//}
//totalGlyphsImg = Sharpen(totalGlyphsImg, 1); //test shapen primary image
//-
//
//create atlas
fontAtlas = atlasBuilder.CreateSimpleFontAtlas();
fontAtlas.TotalGlyph = totalGlyphsImg;
#if DEBUG
//save glyph image for debug
//PixelFarm.Agg.ActualImage.SaveImgBufferToPngFile(
// totalGlyphsImg.GetImageBuffer(),
// totalGlyphsImg.Width * 4,
// totalGlyphsImg.Width, totalGlyphsImg.Height,
// "d:\\WImageTest\\total_" + reqFont.Name + "_" + reqFont.SizeInPoints + ".png");
////save image to cache
SaveImgBufferToFile(totalGlyphsImg, fontTextureImg);
#endif
//cache the atlas
_createdAtlases.Add(fontKey, fontAtlas);
//
//calculate some commonly used values
fontAtlas.SetTextureScaleInfo(
resolvedTypeface.CalculateScaleToPixelFromPointSize(fontAtlas.OriginalFontSizePts),
resolvedTypeface.CalculateScaleToPixelFromPointSize(reqFont.SizeInPoints));
//TODO: review here, use scaled or unscaled values
fontAtlas.SetCommonFontMetricValues(
resolvedTypeface.Ascender,
resolvedTypeface.Descender,
resolvedTypeface.LineGap,
resolvedTypeface.CalculateRecommendLineSpacing());
///
#if DEBUG
_dbugStopWatch.Stop();
System.Diagnostics.Debug.WriteLine("build font atlas: " + _dbugStopWatch.ElapsedMilliseconds + " ms");
#endif
//save font info to cache
using (System.IO.MemoryStream ms = new System.IO.MemoryStream())
{
atlasBuilder.SaveAtlasInfo(ms);
StorageService.Provider.SaveData(fontTextureInfoFile, ms.ToArray());
}
}
}
glBmp = _loadedGlyphs.GetOrCreateNewOne(fontAtlas);
return(fontAtlas);
}