/// <summary>
/// copy chunks from reader - copy_mask : see ChunksToWrite.COPY_XXX
/// If we are after idat, only considers those chunks after IDAT in PngReader
/// TODO: this should be more customizable
/// </summary>
///
private void CopyChunks(PngReader reader, int copy_mask, bool onlyAfterIdat) {
bool idatDone = CurrentChunkGroup >= ChunksList.CHUNK_GROUP_4_IDAT;
if (onlyAfterIdat && reader.CurrentChunkGroup < ChunksList.CHUNK_GROUP_6_END) throw new PngjException("tried to copy last chunks but reader has not ended");
foreach (PngChunk chunk in reader.GetChunksList().GetChunks()) {
int group = chunk.ChunkGroup;
if (group < ChunksList.CHUNK_GROUP_4_IDAT && idatDone)
continue;
bool copy = false;
if (chunk.Crit) {
if (chunk.Id.Equals(ChunkHelper.PLTE, StringComparison.InvariantCultureIgnoreCase)) {
if (ImgInfo.Indexed && ChunkHelper.maskMatch(copy_mask, ChunkCopyBehaviour.COPY_PALETTE))
copy = true;
if (!ImgInfo.Greyscale && ChunkHelper.maskMatch(copy_mask, ChunkCopyBehaviour.COPY_ALL))
copy = true;
}
} else { // ancillary
bool text = chunk is PngChunkTextVar;
bool safe = chunk.Safe;
// notice that these if are not exclusive
if (ChunkHelper.maskMatch(copy_mask, ChunkCopyBehaviour.COPY_ALL))
copy = true;
if (safe && ChunkHelper.maskMatch(copy_mask, ChunkCopyBehaviour.COPY_ALL_SAFE))
copy = true;
if (chunk.Id.Equals(ChunkHelper.tRNS, StringComparison.InvariantCultureIgnoreCase)
&& ChunkHelper.maskMatch(copy_mask, ChunkCopyBehaviour.COPY_TRANSPARENCY))
copy = true;
if (chunk.Id.Equals(ChunkHelper.pHYs, StringComparison.InvariantCultureIgnoreCase) && ChunkHelper.maskMatch(copy_mask, ChunkCopyBehaviour.COPY_PHYS))
copy = true;
if (text && ChunkHelper.maskMatch(copy_mask, ChunkCopyBehaviour.COPY_TEXTUAL))
copy = true;
if (ChunkHelper.maskMatch(copy_mask, ChunkCopyBehaviour.COPY_ALMOSTALL)
&& !(ChunkHelper.IsUnknown(chunk) || text || chunk.Id.Equals(ChunkHelper.hIST, StringComparison.InvariantCultureIgnoreCase) || chunk.Id.Equals(ChunkHelper.tIME, StringComparison.InvariantCultureIgnoreCase)))
copy = true;
if (chunk is PngChunkSkipped)
copy = false;
}
if (copy)
chunksList.Queue(PngChunk.CloneChunk(chunk, ImgInfo));
}
}
public void CopyChunks(PngReader reader, int copy_mask, bool onlyAfterIdat)
{
bool flag = CurrentChunkGroup >= 4;
if (onlyAfterIdat && reader.CurrentChunkGroup < 6)
{
throw new PngjException("tried to copy last chunks but reader has not ended");
}
foreach (PngChunk chunk in reader.GetChunksList().GetChunks())
{
if (chunk.ChunkGroup >= 4 || !flag)
{
bool flag2 = false;
if (chunk.Crit)
{
if (chunk.Id.Equals("PLTE"))
{
if (ImgInfo.Indexed && ChunkHelper.maskMatch(copy_mask, ChunkCopyBehaviour.COPY_PALETTE))
{
flag2 = true;
}
if (!ImgInfo.Greyscale && ChunkHelper.maskMatch(copy_mask, ChunkCopyBehaviour.COPY_ALL))
{
flag2 = true;
}
}
}
else
{
bool flag3 = chunk is PngChunkTextVar;
bool safe = chunk.Safe;
if (ChunkHelper.maskMatch(copy_mask, ChunkCopyBehaviour.COPY_ALL))
{
flag2 = true;
}
if (safe && ChunkHelper.maskMatch(copy_mask, ChunkCopyBehaviour.COPY_ALL_SAFE))
{
flag2 = true;
}
if (chunk.Id.Equals("tRNS") && ChunkHelper.maskMatch(copy_mask, ChunkCopyBehaviour.COPY_TRANSPARENCY))
{
flag2 = true;
}
if (chunk.Id.Equals("pHYs") && ChunkHelper.maskMatch(copy_mask, ChunkCopyBehaviour.COPY_PHYS))
{
flag2 = true;
}
if (flag3 && ChunkHelper.maskMatch(copy_mask, ChunkCopyBehaviour.COPY_TEXTUAL))
{
flag2 = true;
}
if (ChunkHelper.maskMatch(copy_mask, ChunkCopyBehaviour.COPY_ALMOSTALL) && !(ChunkHelper.IsUnknown(chunk) | flag3) && !chunk.Id.Equals("hIST") && !chunk.Id.Equals("tIME"))
{
flag2 = true;
}
if (chunk is PngChunkSkipped)
{
flag2 = false;
}
}
if (flag2)
{
chunksList.Queue(PngChunk.CloneChunk(chunk, ImgInfo));
}
}
}
}