/// <summary>
/// Decompresses the specified image.
/// </summary>
/// <param name="image">The image.</param>
/// <param name="libraryData">The library data.</param>
/// <param name="request">The decompression request</param>
/// <exception cref="TextureToolsException">Decompression failed</exception>
private void Decompress(TexImage image, DxtTextureLibraryData libraryData, DecompressingRequest request)
{
Log.Debug("Decompressing texture ...");
// determine the output format to avoid any sRGB/RGB conversions (only decompression, no conversion)
var outputFormat = !((PixelFormat)libraryData.Metadata.format).IsSRgb() ? request.DecompressedFormat.ToNonSRgb() : request.DecompressedFormat.ToSRgb();
var scratchImage = new ScratchImage();
var hr = Utilities.Decompress(libraryData.DxtImages, libraryData.DxtImages.Length, ref libraryData.Metadata, (DXGI_FORMAT)outputFormat, scratchImage);
if (hr != HRESULT.S_OK)
{
Log.Error("Decompression failed: " + hr);
throw new TextureToolsException("Decompression failed: " + hr);
}
// Freeing Memory
if (image.DisposingLibrary != null)
{
image.DisposingLibrary.Dispose(image);
}
libraryData.Image = scratchImage;
libraryData.DxtImages = libraryData.Image.GetImages();
libraryData.Metadata = libraryData.Image.metadata;
image.DisposingLibrary = this;
// adapt the image format based on desired output format
ChangeDxtImageType(libraryData, (DXGI_FORMAT)request.DecompressedFormat);
UpdateImage(image, libraryData);
}
/// <summary>
/// Decompresses the specified image.
/// </summary>
/// <param name="image">The image.</param>
/// <param name="libraryData">The library data.</param>
/// <param name="request">The decompression request</param>
/// <exception cref="TextureToolsException">Decompression failed</exception>
private void Decompress(TexImage image, AtitcTextureLibraryData libraryData, DecompressingRequest request)
{
Log.Info("Decompressing texture ...");
int totalSize = 0;
Texture[] texOut = new Texture[image.SubImageArray.Length];
int rowPitch, slicePitch;
// Setting the new Texture array that will contained the uncompressed data
for (int i = 0; i < libraryData.Textures.Length; ++i)
{
Tools.ComputePitch(request.DecompressedFormat, libraryData.Textures[i].dwWidth, libraryData.Textures[i].dwHeight, out rowPitch, out slicePitch);
texOut[i] = new Texture(libraryData.Textures[i].dwWidth, libraryData.Textures[i].dwHeight, libraryData.Textures[i].dwWidth * 4, Format.ATI_TC_FORMAT_ARGB_8888, 0, IntPtr.Zero);
texOut[i].dwDataSize = Utilities.CalculateBufferSize(out texOut[i]);
totalSize += texOut[i].dwDataSize;
}
// Allocating memory to store the uncompressed data
image.Data = Marshal.AllocHGlobal(totalSize);
libraryData.Options = new CompressOptions(false, 0, 0, 0, false, false, 0, false, Speed.ATI_TC_Speed_Normal);
Result res;
long offset = 0;
// Decompressing each sub image into the new allocated memory
for (int i = 0; i < libraryData.Textures.Length; ++i)
{
texOut[i].pData = new IntPtr(image.Data.ToInt64() + offset);
offset += texOut[i].dwDataSize;
res = Utilities.ConvertTexture(out libraryData.Textures[i], out texOut[i], out libraryData.Options);
if (res != Result.ATI_TC_OK)
{
Log.Error("Decompression failed: " + res);
throw new TextureToolsException("Decompression failed: " + res);
}
libraryData.Textures[i] = texOut[i];
}
// Deleting old compressed data
if (image.DisposingLibrary != null)
{
image.DisposingLibrary.Dispose(image);
}
// udpating various features
libraryData.Data = image.Data;
image.DataSize = totalSize;
image.RowPitch = libraryData.Textures[0].dwPitch;
image.Format = request.DecompressedFormat;
image.DisposingLibrary = this;
}
/// <summary>
/// Decompresses the specified image.
/// </summary>
/// <param name="image">The image.</param>
/// <param name="libraryData">The library data.</param>
/// <param name="request">The decompression request</param>
/// <exception cref="TextureToolsException">Decompression failed!</exception>
public void Decompress(TexImage image, PvrTextureLibraryData libraryData, DecompressingRequest request)
{
Log.Verbose("Decompressing texture ...");
if (!Utilities.Transcode(libraryData.Texture, PixelType.Standard8PixelType, libraryData.Header.GetChannelType(), libraryData.Header.GetColourSpace(), ECompressorQuality.ePVRTCNormal, true))
{
Log.Error("Decompression failed!");
throw new TextureToolsException("Decompression failed!");
}
image.Format = request.DecompressedFormat;
int pitch, slice;
Tools.ComputePitch(image.Format, image.Width, image.Height, out pitch, out slice);
image.RowPitch = pitch;
image.SlicePitch = slice;
UpdateImage(image, libraryData);
}
