public void BuildMultiFontSize(string multiFontSizeAtlasFilename, string imgOutputFilename)
{
//merge to the new one
//1. ensure same atlas width
int atlasW = 0;
int j = _atlasList.Count;
int totalHeight = 0;
const int interAtlasSpace = 2;
for (int i = 0; i < j; ++i)
{
TempMergingAtlasInfo atlasInfo = _atlasList[i];
SimpleBitmapAtlas fontAtlas = atlasInfo.fontAtlasFile.AtlasList[0];
totalHeight += fontAtlas.Height + interAtlasSpace;
if (i == 0)
{
atlasW = fontAtlas.Width;
}
else
{
if (atlasW != fontAtlas.Width)
{
throw new NotSupportedException();
}
}
}
//--------------------------------------------
//in this version, the glyph offsetY is measure from bottom***
int[] offsetFromBottoms = new int[j];
int offsetFromBottom = interAtlasSpace;//start offset
for (int i = j - 1; i >= 0; --i)
{
TempMergingAtlasInfo atlasInfo = _atlasList[i];
SimpleBitmapAtlas fontAtlas = atlasInfo.fontAtlasFile.AtlasList[0];
offsetFromBottoms[i] = offsetFromBottom;
offsetFromBottom += fontAtlas.Height + interAtlasSpace;
}
//--------------------------------------------
//merge all img to one
int top = 0;
using (MemBitmap memBitmap = new MemBitmap(atlasW, totalHeight))
{
AggPainter painter = AggPainter.Create(memBitmap);
for (int i = 0; i < j; ++i)
{
TempMergingAtlasInfo atlasInfo = _atlasList[i];
BitmapAtlasFile atlasFile = atlasInfo.fontAtlasFile;
SimpleBitmapAtlas fontAtlas = atlasInfo.fontAtlasFile.AtlasList[0];
atlasInfo.NewCloneLocations = SimpleBitmapAtlas.CloneLocationWithOffset(fontAtlas, 0, offsetFromBottoms[i]);
atlasInfo.ImgUrlDict = fontAtlas.ImgUrlDict;
using (Stream fontImgStream = PixelFarm.Platforms.StorageService.Provider.ReadDataStream(atlasInfo.imgFile))
using (MemBitmap atlasBmp = MemBitmapExt.LoadBitmap(fontImgStream))
{
painter.DrawImage(atlasBmp, 0, top);
top += atlasBmp.Height + interAtlasSpace;
}
}
memBitmap.SaveImage(imgOutputFilename);
}
//--------------------------------------------
//save merged font atlas
//TODO: use 'File' provider to access system file
using (FileStream fs = new FileStream(multiFontSizeAtlasFilename, FileMode.Create))
using (BinaryWriter w = new BinaryWriter(fs))
{
//-----------
//overview
//total img info
BitmapAtlasFile fontAtlasFile = new BitmapAtlasFile();
fontAtlasFile.StartWrite(fs);
//1. simple atlas count
fontAtlasFile.WriteOverviewMultiSizeFontInfo((ushort)j);
//2.
for (int i = 0; i < j; ++i)
{
TempMergingAtlasInfo atlasInfo = _atlasList[i];
RequestFont reqFont = atlasInfo.reqFont;
fontAtlasFile.WriteOverviewFontInfo(reqFont.Name, reqFont.GetReqKey(), reqFont.SizeInPoints);//size in points
fontAtlasFile.WriteTotalImageInfo(
(ushort)atlasW,
(ushort)top,
4,
atlasInfo.textureKind);
//
fontAtlasFile.WriteAtlasItems(atlasInfo.NewCloneLocations);
if (atlasInfo.ImgUrlDict != null)
{
fontAtlasFile.WriteImgUrlDict(atlasInfo.ImgUrlDict);
}
}
fontAtlasFile.EndWrite();
}
}
