public void Build(
GlyphTextureBitmapGenerator glyphTextureGen,
Typeface typeface, float fontSizeInPoints,
TextureKind textureKind,
GlyphTextureBuildDetail[] buildDetails)
{
#if DEBUG
//overall, glyph atlas generation time
System.Diagnostics.Stopwatch dbugStopWatch = new System.Diagnostics.Stopwatch();
dbugStopWatch.Start();
#endif
var atlasBuilder = new SimpleBitmapAtlasBuilder();
glyphTextureGen.CreateTextureFontFromBuildDetail(
atlasBuilder,
typeface,
fontSizeInPoints,
textureKind,
buildDetails);
//3. set information before write to font-info
atlasBuilder.SpaceCompactOption = SimpleBitmapAtlasBuilder.CompactOption.ArrangeByHeight;
atlasBuilder.SetAtlasFontInfo(typeface.Name, fontSizeInPoints);
//4. merge all glyph in the builder into a single image
using (MemBitmap totalGlyphsImg = atlasBuilder.BuildSingleImage(true))
{
if (TextureInfoFilename == null)
{
//use random suffix
string random_suffix = Guid.NewGuid().ToString().Substring(0, 7);
string textureName = typeface.Name.ToLower() + "_" + random_suffix + ".info";
string output_imgFilename = textureName + ".png";
TextureInfoFilename = textureName;
OutputImgFilename = output_imgFilename;
}
//5. save atlas info to disk
using (FileStream fs = new FileStream(TextureInfoFilename, FileMode.Create))
{
atlasBuilder.SaveAtlasInfo(fs);
}
//6. save total-glyph-image to disk
totalGlyphsImg.SaveImage(OutputImgFilename);
}
#if DEBUG
dbugStopWatch.Stop();
dbugBuildTimeMillisec = dbugStopWatch.ElapsedMilliseconds;
#endif
}
protected override void OnReadyForInitGLShaderProgram()
{
//just an example
//this is slow on init.
//since we must wait until msdf texture generation is complete.
//in real-world, we should use caching.
using (System.IO.FileStream fs = new System.IO.FileStream("Samples\\SourceSansPro-Regular.ttf", System.IO.FileMode.Open))
{
_typeface = new OpenFontReader().Read(fs);
}
var reqFont = new PixelFarm.Drawing.RequestFont("Source Sans Pro", 32);
//1. create glyph-texture-bitmap generator
var glyphTextureGen = new GlyphTextureBitmapGenerator();
glyphTextureGen.MsdfGenVersion = 3;
//2. generate the glyphs
var atlasBuilder = new SimpleBitmapAtlasBuilder();
glyphTextureGen.CreateTextureFontFromBuildDetail(
atlasBuilder,
_typeface,
reqFont.SizeInPoints,
TextureKind.Msdf,
GlyphTextureCustomConfigs.TryGetGlyphTextureBuildDetail(
Typography.Text.GlobalTextService.TxtClient.ResolveFont(reqFont), false, false)
);
//3. set information before write to font-info
atlasBuilder.SpaceCompactOption = SimpleBitmapAtlasBuilder.CompactOption.ArrangeByHeight;
//4. merge all glyph in the builder into a single image
PixelFarm.CpuBlit.MemBitmap totalGlyphsImg = atlasBuilder.BuildSingleImage(true);
//-------------------------------------------------------------
//5. create a simple font atlas from information inside this atlas builder.
_fontAtlas = atlasBuilder.CreateSimpleBitmapAtlas();
_fontAtlas.SetMainBitmap(totalGlyphsImg, true);
byte[] codepoint = System.Text.Encoding.UTF8.GetBytes("AB");
_glyphIndex_0 = _typeface.GetGlyphIndex(codepoint[0]);
_glyphIndex_1 = _typeface.GetGlyphIndex(codepoint[1]);
}