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();
}
}
private DxtDataHandler(Nvidia.TextureTools.OutputOptions outputOptions)
{
_WriteData = new Nvidia.TextureTools.OutputOptions.WriteDataDelegate(WriteDataInternal);
_BeginImage = new Nvidia.TextureTools.OutputOptions.ImageDelegate(BeginImageInternal);
// Keep the delegate from being re-located or collected by the garbage collector.
delegateHandleBeginImage = GCHandle.Alloc(_BeginImage);
delegateHandleWriteData = GCHandle.Alloc(_WriteData);
outputOptions.SetOutputHandler(_BeginImage, _WriteData);
}
public static Byte[] CompressWithNvidia(this Bitmap srcImage, CompressionMode mode)
{
Assert.AreEqual(8, IntPtr.Size, "nvtt.dll(x64) requires x64 runtime");
var dxtCompressor = new Nvidia.TextureTools.Compressor();
var inputOptions = new Nvidia.TextureTools.InputOptions();
if ((mode & CompressionMode.Dxt1) == 0)
{
inputOptions.SetAlphaMode(Nvidia.TextureTools.AlphaMode.Premultiplied);
}
else
{
inputOptions.SetAlphaMode(Nvidia.TextureTools.AlphaMode.None);
}
inputOptions.SetTextureLayout(Nvidia.TextureTools.TextureType.Texture2D, srcImage.Width, srcImage.Height, 1);
Nvidia.TextureTools.Format outputFormat = Nvidia.TextureTools.Format.DXT1;
if ((mode & CompressionMode.Dxt3) != 0)
{
outputFormat = Nvidia.TextureTools.Format.DXT3;
}
if ((mode & CompressionMode.Dxt5) != 0)
{
outputFormat = Nvidia.TextureTools.Format.DXT5;
}
srcImage = srcImage.Clone();
srcImage.SwapElements(2, 1, 0, 3);
var dataHandle = GCHandle.Alloc(srcImage.Data, GCHandleType.Pinned);
try
{
var dataPtr = dataHandle.AddrOfPinnedObject();
inputOptions.SetMipmapData(dataPtr, srcImage.Width, srcImage.Height, 1, 0, 0);
inputOptions.SetMipmapGeneration(false);
inputOptions.SetGamma(1.0f, 1.0f);
var compressionOptions = new Nvidia.TextureTools.CompressionOptions();
compressionOptions.SetFormat(outputFormat);
compressionOptions.SetQuality(Nvidia.TextureTools.Quality.Normal);
var outputOptions = new Nvidia.TextureTools.OutputOptions();
outputOptions.SetOutputHeader(false);
using (var dataHandler = new DxtDataHandler(outputOptions))
{
dxtCompressor.Compress(inputOptions, compressionOptions, outputOptions);
return(dataHandler._buffer);
}
}
finally
{
dataHandle.Free();
}
}
