/// <summary>
///
/// </summary>
/// <param name="address"></param>
/// <param name="storage"></param>
/// <param name="tile"></param>
public void SaveTile(VTAddress address, IStorage storage, VTTile tile)
{
var name = address.GetFileNameWithoutExtension("") + ".tile";
tile.Write(storage.OpenWrite(name));
//tile.WriteDebug( storage.OpenWrite(name + ".tga") );
}
/// <summary>
///
/// </summary>
/// <param name="context"></param>
/// <param name="pageTable"></param>
public void SplitIntoPages(BuildContext context, VTTextureTable pageTable, IStorage storage)
{
var pageSize = VTConfig.PageSize;
var pageSizeBorder = VTConfig.PageSizeBordered;
var border = VTConfig.PageBorderWidth;
var colorMap = LoadTexture(BaseColor, Color.Gray);
var normalMap = LoadTexture(NormalMap, Color.FlatNormals);
var roughness = LoadTexture(Roughness, Color.Black);
var metallic = LoadTexture(Metallic, Color.Black);
var emission = LoadTexture(Emission, Color.Black);
var pageCountX = colorMap.Width / pageSize;
var pageCountY = colorMap.Height / pageSize;
for (int x = 0; x < pageCountX; x++)
{
for (int y = 0; y < pageCountY; y++)
{
var pageC = new Image(pageSizeBorder, pageSizeBorder);
var pageN = new Image(pageSizeBorder, pageSizeBorder);
var pageS = new Image(pageSizeBorder, pageSizeBorder);
for (int i = 0; i < pageSizeBorder; i++)
{
for (int j = 0; j < pageSizeBorder; j++)
{
int srcX = x * pageSize + i - border;
int srcY = y * pageSize + j - border;
var c = colorMap.SampleClamp(srcX, srcY);
var n = normalMap.SampleClamp(srcX, srcY);
var r = roughness.SampleClamp(srcX, srcY).R;
var m = metallic.SampleClamp(srcX, srcY).R;
var e = emission.SampleClamp(srcX, srcY).R;
pageC.Write(i, j, c);
pageN.Write(i, j, n);
pageS.Write(i, j, new Color(r, m, e, (byte)255));
}
}
var address = new VTAddress((short)(x + AddressX), (short)(y + AddressY), 0);
var tile = new VTTile(address, pageC, pageN, pageS);
pageTable.SaveTile(address, storage, tile);
}
}
}
/// <summary>
///
/// </summary>
/// <param name="address"></param>
/// <returns></returns>
public VTTile LoadImage(VTAddress address)
{
VTTile tile;
if (!cache.TryGetValue(address, out tile))
{
var path = address.GetFileNameWithoutExtension(".tile");
if (storage.FileExists(path))
{
tile = new VTTile(address);
tile.Read(storage.OpenFile(path, FileMode.Open, FileAccess.Read));
}
else
{
tile = new VTTile(address);
tile.Clear(Color.Black);
}
cache.Add(address, tile);
}
return(tile);
}
/// <summary>
/// Generates mip levels for all tiles.
/// </summary>
/// <param name="buildContext"></param>
/// <param name="pageTable"></param>
/// <param name="sourceMipLevel"></param>
/// <param name="mapStorage"></param>
void GenerateMipLevels(BuildContext buildContext, VTTextureTable pageTable, int sourceMipLevel, IStorage mapStorage)
{
if (sourceMipLevel >= VTConfig.MipCount)
{
throw new ArgumentOutOfRangeException("mipLevel");
}
//int count = VTConfig.VirtualPageCount >> sourceMipLevel;
int sizeB = VTConfig.PageSizeBordered;
var cache = new TileSamplerCache(mapStorage);
foreach (var vttex in pageTable.SourceTextures)
{
if (!vttex.TilesDirty)
{
continue;
}
int startX = RoundDown2(vttex.AddressX, sourceMipLevel);
int startY = RoundDown2(vttex.AddressY, sourceMipLevel);
int wTiles = (vttex.Width / VTConfig.PageSize);
int hTiles = (vttex.Width / VTConfig.PageSize);
int endExX = RoundUp2(vttex.AddressX + wTiles, sourceMipLevel);
int endExY = RoundUp2(vttex.AddressY + hTiles, sourceMipLevel);
for (int pageX = startX; pageX < endExX; pageX += 2)
{
for (int pageY = startY; pageY < endExY; pageY += 2)
{
var address00 = new VTAddress(pageX + 0, pageY + 0, sourceMipLevel);
var address01 = new VTAddress(pageX + 0, pageY + 1, sourceMipLevel);
var address10 = new VTAddress(pageX + 1, pageY + 0, sourceMipLevel);
var address11 = new VTAddress(pageX + 1, pageY + 1, sourceMipLevel);
// there are no images touching target mip-level.
// NOTE: we can skip images that are touched by border.
//if ( !pageTable.IsAnyExists( address00, address01, address10, address11 ) ) {
// continue;
//}
var address = new VTAddress(pageX / 2, pageY / 2, sourceMipLevel + 1);
var tile = new VTTile(address);
var offsetX = (pageX) * VTConfig.PageSize;
var offsetY = (pageY) * VTConfig.PageSize;
var border = VTConfig.PageBorderWidth;
var colorValue = Color.Zero;
var normalValue = Color.Zero;
var specularValue = Color.Zero;
for (int x = 0; x < sizeB; x++)
{
for (int y = 0; y < sizeB; y++)
{
int srcX = offsetX + x * 2 - border * 2;
int srcY = offsetY + y * 2 - border * 2;
SampleMegatextureQ4(cache, srcX, srcY, sourceMipLevel, ref colorValue, ref normalValue, ref specularValue);
tile.SetValues(x, y, ref colorValue, ref normalValue, ref specularValue);
}
}
pageTable.SaveTile(address, mapStorage, tile);
}
}
}
}