/// <summary>
///
/// </summary>
/// <param name="dependencies"></param>
/// <returns></returns>
public Stream OpenTargetStream(IEnumerable <string> dependencies)
{
var dir = Path.GetDirectoryName(FullTargetPath);
Directory.CreateDirectory(dir);
var args = string.Join(" ", BuildArguments);
return(AssetStream.OpenWrite(FullTargetPath, args, dependencies.Concat(new[] { KeyPath }).Distinct().ToArray()));
}
/// <summary>
///
/// </summary>
/// <param name="buildContext"></param>
public override void Process(AssetSource assetFile, BuildContext context)
{
Log.Message("-------- Virtual Texture --------");
var stopwatch = new Stopwatch();
stopwatch.Start();
var xmlFiles = Directory.EnumerateFiles(Path.Combine(Builder.FullInputDirectory, "vt"), "*.xml").ToList();
Log.Message("{0} megatexture segments", xmlFiles.Count);
//
// Process tiles :
//
using (var tileStorage = context.GetVTStorage()) {
var pageTable = CreateVTTextureTable(xmlFiles, context, tileStorage);
//
// Get allocator and pack/repack textures :
//
Allocator2D allocator = null;
if (tileStorage.FileExists(targetAllocator) && tileStorage.FileExists(targetMegatexture))
{
Log.Message("Loading VT allocator...");
using (var allocStream = tileStorage.OpenRead(targetAllocator)) {
allocator = Allocator2D.LoadState(allocStream);
var targetTime = tileStorage.GetLastWriteTimeUtc(targetMegatexture);
Log.Message("Repacking textures to atlas...");
RepackTextureAtlas(pageTable, allocator, targetTime);
}
}
else
{
allocator = new Allocator2D(VTConfig.VirtualPageCount);
Log.Message("Packing ALL textures to atlas...");
PackTextureAtlas(pageTable.SourceTextures, allocator);
}
Log.Message("Saving VT allocator...");
using (var allocStream = tileStorage.OpenWrite(targetAllocator)) {
Allocator2D.SaveState(allocStream, allocator);
}
//
// Generate top-level pages :
//
Log.Message("Generating pages...");
GenerateMostDetailedPages(pageTable.SourceTextures, context, pageTable, tileStorage);
//
// Generate mip-maps :
//
Log.Message("Generating mipmaps...");
for (int mip = 0; mip < VTConfig.MipCount - 1; mip++)
{
Log.Message("Generating mip level {0}/{1}...", mip, VTConfig.MipCount);
GenerateMipLevels(context, pageTable, mip, tileStorage);
}
//
// Write asset :
//
using (var stream = tileStorage.OpenWrite(targetMegatexture)) {
using (var assetStream = AssetStream.OpenWrite(stream, "", new[] { "" })) {
using (var sw = new BinaryWriter(assetStream)) {
sw.Write(pageTable.SourceTextures.Count);
foreach (var tex in pageTable.SourceTextures)
{
VTTexture.Write(tex, sw);
}
}
}
}
}
stopwatch.Stop();
Log.Message("{0}", stopwatch.Elapsed.ToString());
Log.Message("----------------");
}
