/// <summary>
/// Finishes writing uncompressed data to the output stream without closing
/// the underlying stream. Use this method when applying multiple filters in
/// succession to the same output stream.
/// </summary>
/// <exception cref="IOException"> if an I/O error occurs or this stream is already
/// closed </exception>
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in .NET:
//ORIGINAL LINE: public void finish() throws java.io.IOException
public virtual void Finish()
{
EnsureOpen();
// Finish decompressing and writing pending output data
Flush();
if (UsesDefaultInflater)
{
Inf.End();
}
}
public void decode(ByteBuffer buffer, int stride, Format fmt)
{
int offset = buffer.Position();
int lineSize = ((width * bitdepth + 7) / 8) * bytesPerPixel;
byte[] curLine = new byte[lineSize + 1];
byte[] prevLine = new byte[lineSize + 1];
byte[] palLine = (bitdepth < 8) ? new byte[width + 1] : null;
Inflater inflater = new Inflater();
try
{
for (int y = 0; y < height; y++)
{
readChunkUnzip(inflater, curLine, 0, curLine.Length);
unfilter(curLine, prevLine);
buffer.Position(offset + y * stride);
switch (colorType)
{
case COLOR_TRUECOLOR:
switch (fmt)
{
case Format.ABGR:
copyRGBtoABGR(buffer, curLine);
break;
case Format.RGBA:
copyRGBtoRGBA(buffer, curLine);
break;
case Format.BGRA:
copyRGBtoBGRA(buffer, curLine);
break;
case Format.RGB:
copy(buffer, curLine);
break;
default:
throw new UnsupportedOperationException("Unsupported format for this image");
}
break;
case COLOR_TRUEALPHA:
switch (fmt)
{
case Format.ABGR:
copyRGBAtoABGR(buffer, curLine);
break;
case Format.RGBA:
copy(buffer, curLine);
break;
case Format.BGRA:
copyRGBAtoBGRA(buffer, curLine);
break;
case Format.RGB:
copyRGBAtoRGB(buffer, curLine);
break;
default:
throw new UnsupportedOperationException("Unsupported format for this image");
}
break;
case COLOR_GREYSCALE:
switch (fmt)
{
case Format.LUMINANCE:
case Format.ALPHA:
copy(buffer, curLine);
break;
default:
throw new UnsupportedOperationException("Unsupported format for this image");
}
break;
case COLOR_GREYALPHA:
switch (fmt)
{
case Format.LUMINANCE_ALPHA:
copy(buffer, curLine);
break;
default:
throw new UnsupportedOperationException("Unsupported format for this image");
}
break;
case COLOR_INDEXED:
switch (bitdepth)
{
case 8:
palLine = curLine;
break;
case 4:
expand4(curLine, palLine);
break;
case 2:
expand2(curLine, palLine);
break;
case 1:
expand1(curLine, palLine);
break;
default:
throw new UnsupportedOperationException("Unsupported bitdepth for this image");
}
switch (fmt)
{
case Format.ABGR:
copyPALtoABGR(buffer, palLine);
break;
case Format.RGBA:
copyPALtoRGBA(buffer, palLine);
break;
case Format.BGRA:
copyPALtoBGRA(buffer, palLine);
break;
default:
throw new UnsupportedOperationException("Unsupported format for this image");
}
break;
default:
throw new UnsupportedOperationException("Not yet implemented");
}
byte[] tmp = curLine;
curLine = prevLine;
prevLine = tmp;
}
}
finally
{
inflater.End();
}
}
