private static TextureLoadInfo ParseHeader(ref BlpHeader header)
{
var ret = new TextureLoadInfo
{
Height = header.Height,
Width = header.Width
};
if (header.Compression == 2)
{
switch (header.AlphaCompression)
{
case 0:
ret.Format = SharpDX.DXGI.Format.BC1_UNorm;
ret.BlockSize = 8;
break;
case 1:
ret.Format = SharpDX.DXGI.Format.BC2_UNorm;
ret.BlockSize = 16;
break;
case 7:
ret.Format = SharpDX.DXGI.Format.BC3_UNorm;
ret.BlockSize = 16;
break;
}
}
else
{
ret.Format = SharpDX.DXGI.Format.R8G8B8A8_UNorm;
}
return(ret);
}
private static BlpHeader WriteHeader(BinaryWriter output, Image image, Format format, bool hasMips)
{
var header = new BlpHeader
{
Magic = 0x32504C42,
Width = image.Width,
Height = image.Height,
Compression = 2,
AlphaCompression = (byte)(format == Format.BC1_UNorm ? 0 : (format == Format.BC2_UNorm ? 1 : 7)),
AlphaDepth = 0,
MipLevels = (byte)(hasMips ? 1 : 0),
Version = 1
};
output.Write(header);
return(header);
}
private static void ParseUncompressedLayer(int layer, ref uint[] palette, BinaryReader baseReader, ref BlpHeader header, TextureLoadInfo loadInfo)
{
if (header.Compression == 3)
{
return;
}
if (palette.Length == 0)
{
baseReader.BaseStream.Position = SizeCache <BlpHeader> .Size;
palette = baseReader.ReadArray <uint>(256);
}
var w = Math.Max(header.Width >> layer, 1);
var h = Math.Max(header.Height >> layer, 1);
var indices = loadInfo.Layers[layer];
var colors = new byte[w * h * 4];
if (header.AlphaDepth == 8)
{
DecompPaletteFastPath(ref palette, ref indices, ref colors);
}
else
{
DecompPaletteA8R8G8B8(header.AlphaDepth, ref palette, ref indices, ref colors);
}
loadInfo.Layers[layer] = colors;
}
private static unsafe void ParseLayer(int layer, ref uint[] palette, BinaryReader reader, BlpHeader header, TextureLoadInfo loadInfo)
{
if (header.Sizes[layer] == 0)
{
return;
}
var w = Math.Max(1, header.Width >> layer);
reader.BaseStream.Position = header.Offsets[layer];
loadInfo.Layers.Add(reader.ReadBytes(header.Sizes[layer]));
if (loadInfo.Format != SharpDX.DXGI.Format.R8G8B8A8_UNorm)
{
loadInfo.RowPitchs.Add(((w + 3) / 4) * loadInfo.BlockSize);
}
else
{
ParseUncompressedLayer(layer, ref palette, reader, ref header, loadInfo);
loadInfo.RowPitchs.Add(w * 4);
}
}
private static TextureLoadInfo ParseHeader(ref BlpHeader header)
{
var ret = new TextureLoadInfo
{
Height = header.Height,
Width = header.Width
};
if (header.Compression == 2)
{
switch (header.AlphaCompression)
{
case 0:
ret.Format = SharpDX.DXGI.Format.BC1_UNorm;
ret.BlockSize = 8;
break;
case 1:
ret.Format = SharpDX.DXGI.Format.BC2_UNorm;
ret.BlockSize = 16;
break;
case 7:
ret.Format = SharpDX.DXGI.Format.BC3_UNorm;
ret.BlockSize = 16;
break;
}
}
else
ret.Format = SharpDX.DXGI.Format.R8G8B8A8_UNorm;
return ret;
}
private static void ParseUncompressedLayer(int layer, ref uint[] palette, BinaryReader baseReader, ref BlpHeader header, TextureLoadInfo loadInfo)
{
if (header.Compression == 3)
return;
if (palette.Length == 0)
{
baseReader.BaseStream.Position = SizeCache<BlpHeader>.Size;
palette = baseReader.ReadArray<uint>(256);
}
var w = Math.Max(header.Width >> layer, 1);
var h = Math.Max(header.Height >> layer, 1);
var indices = loadInfo.Layers[layer];
var colors = new byte[w * h * 4];
if (header.AlphaDepth == 8)
DecompPaletteFastPath(ref palette, ref indices, ref colors);
else
DecompPaletteA8R8G8B8(header.AlphaDepth, ref palette, ref indices, ref colors);
loadInfo.Layers[layer] = colors;
}
private static unsafe void ParseLayer(int layer, ref uint[] palette, BinaryReader reader, BlpHeader header, TextureLoadInfo loadInfo)
{
if (header.Sizes[layer] == 0)
return;
var w = Math.Max(1, header.Width >> layer);
reader.BaseStream.Position = header.Offsets[layer];
loadInfo.Layers.Add(reader.ReadBytes(header.Sizes[layer]));
if (loadInfo.Format != SharpDX.DXGI.Format.R8G8B8A8_UNorm)
loadInfo.RowPitchs.Add(((w + 3) / 4) * loadInfo.BlockSize);
else
{
ParseUncompressedLayer(layer, ref palette, reader, ref header, loadInfo);
loadInfo.RowPitchs.Add(w * 4);
}
}
