internal int WriteChunks(IO.Stream os, int currentGroup)
{
List <int> written = new List <int>();
for (int i = 0; i < queuedChunks.Count; i++)
{
PngChunk chunk = queuedChunks[i];
if (!ShouldWrite(chunk, currentGroup))
{
continue;
}
if (ChunkHelper.IsCritical(chunk.Id) && !chunk.Id.Equals(ChunkHelper.PLTE))
{
throw new System.IO.IOException($"bad chunk queued: {chunk}");
}
if (alreadyWrittenKeys.ContainsKey(chunk.Id) && !chunk.AllowsMultiple())
{
throw new System.IO.IOException($"duplicated chunk does not allow multiple: {chunk}");
}
chunk.Write(os);
chunks.Add(chunk);
alreadyWrittenKeys[chunk.Id] = alreadyWrittenKeys.ContainsKey(chunk.Id) ? alreadyWrittenKeys[chunk.Id] + 1 : 1;
written.Add(i);
chunk.ChunkGroup = currentGroup;
}
for (int k = written.Count - 1; k != -1; k--)
{
queuedChunks.RemoveAt(written[k]);
}
return(written.Count);
}
internal int writeChunks(Stream os, int currentGroup)
{
List <int> written = new List <int>();
for (int i = 0; i < queuedChunks.Count; i++)
{
PngChunk c = queuedChunks[i];
if (!shouldWrite(c, currentGroup))
{
continue;
}
if (ChunkHelper.IsCritical(c.Id) && !c.Id.Equals(ChunkHelper.PLTE))
{
throw new PngjOutputException("bad chunk queued: " + c);
}
if (alreadyWrittenKeys.ContainsKey(c.Id) && !c.AllowsMultiple())
{
throw new PngjOutputException("duplicated chunk does not allow multiple: " + c);
}
c.write(os);
chunks.Add(c);
alreadyWrittenKeys[c.Id] = alreadyWrittenKeys.ContainsKey(c.Id) ? alreadyWrittenKeys[c.Id] + 1 : 1;
written.Add(i);
c.ChunkGroup = currentGroup;
}
for (int k = written.Count - 1; k >= 0; k--)
{
queuedChunks.RemoveAt(written[k]);
}
return(written.Count);
}
/// <summary>
/// Constructs an empty chunk
/// </summary>
/// <param name="id"></param>
/// <param name="imgInfo"></param>
protected PngChunk(string id, ImageInfo imgInfo)
{
Id = id;
ImgInfo = imgInfo;
Crit = ChunkHelper.IsCritical(id);
Pub = ChunkHelper.IsPublic(id);
Safe = ChunkHelper.IsSafeToCopy(id);
Priority = false;
ChunkGroup = -1;
Length = -1;
Offset = 0;
}