/// <summary>
///
/// </summary>
/// <param name="textures"></param>
void PackTextureAtlas(IEnumerable <VTTexture> textures, Allocator2D allocator)
{
foreach (var tex in textures)
{
var size = Math.Max(tex.Width / 128, tex.Height / 128);
var addr = allocator.Alloc(size, tex.Name);
tex.TexelOffsetX = addr.X * VTConfig.PageSize;
tex.TexelOffsetY = addr.Y * VTConfig.PageSize;
tex.TilesDirty = true;
Log.Message("...add: {0} : {1}x{2} : tile[{3},{4}]", tex.Name, tex.Width, tex.Height, addr.X, addr.Y);
}
}
/// <summary>
///
/// </summary>
/// <param name="textures"></param>
void RepackTextureAtlas(VTTextureTable vtexTable, Allocator2D allocator, DateTime targetWriteTime)
{
//
// remove deleted and changes textures from allocator :
//
var blockInfo = allocator.GetAllocatedBlockInfo();
foreach (var block in blockInfo)
{
if (!vtexTable.Contains(block.Tag))
{
Log.Message("...removed: {0}", block.Tag);
allocator.Free(block.Address);
}
else
{
if (vtexTable[block.Tag].IsModified(targetWriteTime))
{
Log.Message("...changed: {0}", block.Tag);
allocator.Free(block.Address);
}
}
}
//
// add missing textures (note, changed are already removed).
//
var blockDictionary = allocator.GetAllocatedBlockInfo().ToDictionary(bi => bi.Tag);
var newTextureList = new List <VTTexture>();
foreach (var tex in vtexTable.SourceTextures)
{
Allocator2D.BlockInfo bi;
if (blockDictionary.TryGetValue(tex.Name, out bi))
{
tex.TexelOffsetX = bi.Address.X * VTConfig.PageSize;
tex.TexelOffsetY = bi.Address.Y * VTConfig.PageSize;
}
else
{
newTextureList.Add(tex);
}
}
PackTextureAtlas(newTextureList, allocator);
}
public static Allocator2D LoadState(BinaryReader reader)
{
// read header:
var fourcc = reader.ReadFourCC();
var version = reader.ReadFourCC();
var size = reader.ReadInt32();
var allocator = new Allocator2D(size);
// read nodes if depth-first order :
var S = new Stack <Block>();
S.Push(allocator.rootBlock);
while (S.Any())
{
var block = S.Pop();
var fcc = reader.ReadFourCC();
block.Address.X = reader.ReadInt32();
block.Address.Y = reader.ReadInt32();
block.Size = reader.ReadInt32();
var state = (BlockState)reader.ReadInt32();
if (state == BlockState.Allocated)
{
block.Tag = reader.ReadString();
}
if (state == BlockState.Split)
{
block.Split();
S.Push(block.BottomRight);
S.Push(block.BottomLeft);
S.Push(block.TopRight);
S.Push(block.TopLeft);
}
}
return(allocator);
}
/// <summary>
///
/// </summary>
/// <param name="allocator"></param>
/// <returns></returns>
public static void SaveState(BinaryWriter writer, Allocator2D allocator)
{
// write header:
writer.WriteFourCC("MLC2");
writer.WriteFourCC("1.00");
writer.Write(allocator.Size);
// write nodes if depth-first order :
var S = new Stack <Block>();
S.Push(allocator.rootBlock);
while (S.Any())
{
var block = S.Pop();
writer.WriteFourCC("BLCK");
writer.Write(block.Address.X);
writer.Write(block.Address.Y);
writer.Write(block.Size);
writer.Write((int)block.State);
if (block.State == BlockState.Allocated)
{
writer.Write(block.Tag);
}
if (block.State == BlockState.Split)
{
S.Push(block.BottomRight);
S.Push(block.BottomLeft);
S.Push(block.TopRight);
S.Push(block.TopLeft);
}
}
}
/// <summary>
///
/// </summary>
/// <param name="dir"></param>
public static void RunTest(int size, int interations, string dir)
{
Log.Message("Allocator2D test: {0} {1} {2}", size, interations, dir);
var dirInfo = Directory.CreateDirectory(dir);
foreach (FileInfo file in dirInfo.GetFiles())
{
file.Delete();
}
var alloc = new Allocator2D(size);
var image = new Image(size, size, Color.Black);
var rand = new Random();
var list = new List <Int2>();
for (int i = 0; i < interations; i++)
{
Log.Message("{0,3:D3}/{1,3:D3}", i, interations);
try {
bool allocNotFree = rand.NextFloat(0, 1) < 0.5f;
bool reloadState = rand.NextFloat(0, 1) < 0.1f;
if (allocNotFree)
{
for (int j = 0; j < rand.Next(1, 16); j++)
{
//var sz = MathUtil.RoundUpNextPowerOf2( rand.Next(1,64) );
var sz = rand.Next(1, 64);
var tag = string.Format("Block#{0,4:D4}##{1,4:D4}", i, sz);
var a = alloc.Alloc(sz, tag);
list.Add(a);
DrawRectangle(image, a.X, a.Y, sz, sz, rand.NextColor(), false);
}
}
else
{
for (int j = 0; j < rand.Next(1, 16); j++)
{
if (!list.Any())
{
break;
}
var id = rand.Next(list.Count);
var fa = list[id];
list.RemoveAt(id);
var sz = alloc.Free(fa);
DrawRectangle(image, fa.X, fa.Y, sz, sz, Color.Black, true);
}
}
var imagePath = Path.Combine(dir, string.Format("allocTest{0,4:D4}.tga", i));
var stackPath = Path.Combine(dir, string.Format("allocTest{0,4:D4}.stk", i));
Image.SaveTga(image, imagePath);
if (reloadState)
{
Log.Message("---- STATE RELOAD ----------------------------------");
using (var stream = File.OpenWrite(stackPath)) {
Allocator2D.SaveState(stream, alloc);
}
using (var stream = File.OpenRead(stackPath)) {
alloc = Allocator2D.LoadState(stream);
}
}
} catch (Exception e) {
Log.Error("Exception: {0}", e.Message);
continue;
}
}
Log.Message("Done!");
}
public static void SaveState(Stream targetStream, Allocator2D allocator)
{
var writer = new BinaryWriter(targetStream, Encoding.Default, true);
SaveState(writer, allocator);
}
/// <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("----------------");
}