public static Byte[] Compress(Byte[] data, int width, int height, Nvidia.TextureTools.InputOptions inOptions, Nvidia.TextureTools.CompressionOptions compressionOptions)
{
var dxtCompressor = new Nvidia.TextureTools.Compressor();
var dataHandle = GCHandle.Alloc(data, GCHandleType.Pinned);
try
{
var dataPtr = dataHandle.AddrOfPinnedObject();
inOptions.SetMipmapData(dataPtr, width, height, 1, 0, 0);
var outOptions = new Nvidia.TextureTools.OutputOptions();
outOptions.SetOutputHeader(false);
using (var dataHandler = new DxtDataHandler(outOptions))
{
dxtCompressor.Compress(inOptions, compressionOptions, outOptions);
return(dataHandler._buffer);
}
}
finally
{
dataHandle.Free();
}
}
public static Byte[] CompressWithNvidia(this Bitmap srcImage, CompressionMode mode)
{
System.Diagnostics.Debug.Assert(IntPtr.Size == 8, "nvtt.dll(x64) requires x64 runtime");
srcImage = srcImage.Clone();
srcImage.SwapElements(2, 1, 0, 3);
var inputOptions = new Nvidia.TextureTools.InputOptions();
inputOptions.SetTextureLayout(Nvidia.TextureTools.TextureType.Texture2D, srcImage.Width, srcImage.Height, 1);
inputOptions.SetMipmapGeneration(false);
inputOptions.SetGamma(1.0f, 1.0f);
if ((mode & CompressionMode.Dxt1) == 0)
{
inputOptions.SetAlphaMode(Nvidia.TextureTools.AlphaMode.Premultiplied);
}
else
{
inputOptions.SetAlphaMode(Nvidia.TextureTools.AlphaMode.None);
}
var compressionOptions = new Nvidia.TextureTools.CompressionOptions();
compressionOptions.SetQuality(Nvidia.TextureTools.Quality.Normal);
if ((mode & CompressionMode.Dxt1) != 0)
{
compressionOptions.SetFormat(Nvidia.TextureTools.Format.DXT1);
}
if ((mode & CompressionMode.Dxt3) != 0)
{
compressionOptions.SetFormat(Nvidia.TextureTools.Format.DXT3);
}
if ((mode & CompressionMode.Dxt5) != 0)
{
compressionOptions.SetFormat(Nvidia.TextureTools.Format.DXT5);
}
return(DxtDataHandler.Compress(srcImage.Data, srcImage.Width, srcImage.Height, inputOptions, compressionOptions));
}