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]);
}
public static void BuildBitmapAtlas(AtlasProject atlasProj, Func <string, MemBitmap> imgLoader, bool test_extract = false)
{
//demonstrate how to build a bitmap atlas
List <AtlasItemSourceFile> fileList = atlasProj.Items;
//1. create builder
var bmpAtlasBuilder = new SimpleBitmapAtlasBuilder();
ushort index = 0;
Dictionary <string, ushort> imgDic = new Dictionary <string, ushort>();
foreach (AtlasItemSourceFile f in fileList)
{
if (f.Kind != AtlasItemSourceKind.Image)
{
continue;
}
//3. load a bitmap
BitmapAtlasItemSource atlasItem = null;
using (MemBitmap itemBmp = imgLoader(f.AbsoluteFilename))
{
//4. get information about it
atlasItem = new BitmapAtlasItemSource(itemBmp.Width, itemBmp.Height);
atlasItem.SetImageBuffer(MemBitmap.CopyImgBuffer(itemBmp));
}
atlasItem.UniqueInt16Name = index;
//5. add to builder
bmpAtlasBuilder.AddItemSource(atlasItem);
//get relative filename
string imgPath = "//" + f.Link;
imgDic.Add(imgPath, index);
index++;
//------------
#if DEBUG
if (index >= ushort.MaxValue)
{
throw new NotSupportedException();
}
#endif
//------------
}
if (imgDic.Count == 0)
{
//no file
return;
}
string atlasInfoFile = atlasProj.OutputFilename + ".info";
string totalImgFile = atlasProj.OutputFilename + ".png";
//5. merge all small images into a bigone
using (MemBitmap totalImg = bmpAtlasBuilder.BuildSingleImage(false))
{
bmpAtlasBuilder.ImgUrlDict = imgDic;
bmpAtlasBuilder.SetAtlasInfo(TextureKind.Bitmap, 0); //font size
//6. save atlas info and total-img (.png file)
bmpAtlasBuilder.SaveAtlasInfo(atlasInfoFile);
totalImg.SaveImage(totalImgFile);
}
//----------------------
//7. create an atlas file in a source file version, user can embed the source to file
//easy, just read .info and .png then convert to binary buffer
BuildAtlasInEmbededSourceVersion(atlasProj, atlasInfoFile, totalImgFile, imgDic);
//----------------------
//test, read data back
//----------------------
if (test_extract)
{
bmpAtlasBuilder = new SimpleBitmapAtlasBuilder();
SimpleBitmapAtlas bitmapAtlas = bmpAtlasBuilder.LoadAtlasInfo(atlasInfoFile)[0];
//
MemBitmap totalAtlasImg = imgLoader(totalImgFile);
bitmapAtlas.SetMainBitmap(imgLoader(totalImgFile), true);
//-----
for (int i = 0; i < index; ++i)
{
if (bitmapAtlas.TryGetItem((ushort)i, out AtlasItem bmpMapData))
{
//test copy data from bitmap
MemBitmap itemImg = totalAtlasImg.CopyImgBuffer(bmpMapData.Left, bmpMapData.Top, bmpMapData.Width, bmpMapData.Height);
itemImg.SaveImage("test1_atlas_item" + i + ".png");
}
}
//test,
{
if (bitmapAtlas.TryGetItem(@"\chk_checked.png", out AtlasItem bmpMapData))
{
MemBitmap itemImg = totalAtlasImg.CopyImgBuffer(bmpMapData.Left, bmpMapData.Top, bmpMapData.Width, bmpMapData.Height);
itemImg.SaveImage("test1_atlas_item_a.png");
}
}
}
}
