/// <summary>Queues the chunk at the writer</summary>
/// <param name="chunk">Chunk, ready for write</param>
/// <param name="lazyOverwrite">Ovewrite lazily equivalent chunks</param>
/// <remarks>Warning: the overwriting applies to equivalent chunks, see <c>ChunkPredicateEquiv</c>
/// and will only make sense for queued (not yet writen) chunks
/// </remarks>
public void QueueChunk(PngChunk chunk, bool lazyOverwrite)
{
ChunksListForWrite cl = GetChunkListW();
if (ReadOnly)
{
throw new PngjException("cannot set chunk : readonly metadata");
}
if (lazyOverwrite)
{
ChunkHelper.TrimList(cl.GetQueuedChunks(), new ChunkPredicateEquiv(chunk));
}
cl.Queue(chunk);
}
public PngWriter(Stream outputStream, ImageInfo imgInfo, string filename)
{
this.filename = ((filename == null) ? "" : filename);
this.outputStream = outputStream;
ImgInfo = imgInfo;
CompLevel = 6;
ShouldCloseStream = true;
IdatMaxSize = 0;
CompressionStrategy = EDeflateCompressStrategy.Filtered;
rowb = new byte[imgInfo.BytesPerRow + 1];
rowbprev = new byte[rowb.Length];
rowbfilter = new byte[rowb.Length];
chunksList = new ChunksListForWrite(ImgInfo);
metadata = new PngMetadata(chunksList);
filterStrat = new FilterWriteStrategy(ImgInfo, FilterType.FILTER_DEFAULT);
unpackedMode = false;
needsPack = (unpackedMode && imgInfo.Packed);
}
public PngWriter( Stream outputStream, ImageInfo imgInfo,
String filename )
{
this.filename = ( filename == null ) ? "" : filename;
this.outputStream = outputStream;
this.ImgInfo = imgInfo;
this.CompLevel = 6;
this.ShouldCloseStream = true;
this.IdatMaxSize = 0;
this.CompressionStrategy = EDeflateCompressStrategy.Filtered;
rowb = new byte [ imgInfo.BytesPerRow + 1 ];
rowbprev = new byte [ rowb.Length ];
rowbfilter = new byte [ rowb.Length ];
chunksList = new ChunksListForWrite ( ImgInfo );
metadata = new PngMetadata ( chunksList );
filterStrat = new FilterWriteStrategy ( ImgInfo, FilterType.FILTER_DEFAULT );
unpackedMode = false;
needsPack = unpackedMode && imgInfo.Packed;
}
/// <summary>
/// Constructs a PngWriter from a outputStream, with optional filename or description
/// </summary>
/// <remarks>
/// After construction nothing is writen yet. You still can set some
/// parameters (compression, filters) and queue chunks before start writing the pixels.
///
/// See also <c>FileHelper.createPngWriter()</c>
/// </remarks>
/// <param name="outputStream">Opened stream for binary writing</param>
/// <param name="imgInfo">Basic image parameters</param>
/// <param name="filename">Optional, can be the filename or a description.</param>
public PngWriter(Stream outputStream, ImageInfo imgInfo,
String filename) {
this.filename = filename == null ? "" : filename;
this.outputStream = outputStream;
ImgInfo = imgInfo;
// defaults settings
CompLevel = 6;
ShouldCloseStream = true;
IdatMaxSize = 0; // use default
CompressionStrategy = EDeflateCompressStrategy.Filtered;
// prealloc
//scanline = new int[imgInfo.SamplesPerRowPacked];
rowb = new byte[imgInfo.BytesPerRow + 1];
rowbprev = new byte[rowb.Length];
rowbfilter = new byte[rowb.Length];
chunksList = new ChunksListForWrite(ImgInfo);
metadata = new PngMetadata(chunksList);
filterStrat = new FilterWriteStrategy(ImgInfo, FilterType.FILTER_DEFAULT);
unpackedMode = false;
needsPack = unpackedMode && imgInfo.Packed;
}
