| static private compressBytes ( byte ori, bool compress ) : byte[] | ||
| ori | byte | |
| compress | bool | |
| return | byte[] | |
public override void ParseFromRaw(ChunkRaw c)
{
int nullsep = -1;
for (int i = 0; i < c.Data.Length; i++) // look for first zero
{
if (c.Data[i] != 0)
{
continue;
}
nullsep = i;
break;
}
if (nullsep < 0 || nullsep > c.Data.Length - 2)
{
throw new PngjException("bad zTXt chunk: no separator found");
}
key = ChunkHelper.ToString(c.Data, 0, nullsep);
int compmet = c.Data[nullsep + 1];
if (compmet != 0)
{
throw new PngjException("bad zTXt chunk: unknown compression method");
}
byte[] uncomp = ChunkHelper.compressBytes(c.Data, nullsep + 2, c.Data.Length - nullsep - 2, false); // uncompress
val = ChunkHelper.ToString(uncomp);
}
public override ChunkRaw CreateRawChunk()
{
if (key.Length == 0)
{
throw new PngjException("Text chunk key must be non empty");
}
MemoryStream memoryStream = new MemoryStream();
ChunkHelper.WriteBytesToStream(memoryStream, ChunkHelper.ToBytes(key));
memoryStream.WriteByte(0);
memoryStream.WriteByte((byte)(compressed ? 1 : 0));
memoryStream.WriteByte(0);
ChunkHelper.WriteBytesToStream(memoryStream, ChunkHelper.ToBytes(langTag));
memoryStream.WriteByte(0);
ChunkHelper.WriteBytesToStream(memoryStream, ChunkHelper.ToBytesUTF8(translatedTag));
memoryStream.WriteByte(0);
byte[] array = ChunkHelper.ToBytesUTF8(val);
if (compressed)
{
array = ChunkHelper.compressBytes(array, compress: true);
}
ChunkHelper.WriteBytesToStream(memoryStream, array);
byte[] array2 = memoryStream.ToArray();
ChunkRaw chunkRaw = createEmptyChunk(array2.Length, alloc: false);
chunkRaw.Data = array2;
return(chunkRaw);
}
public override ChunkRaw CreateRawChunk()
{
if (key.Length == 0)
{
throw new PngjException("Text chunk key must be non empty");
}
MemoryStream ba = new MemoryStream();
ChunkHelper.WriteBytesToStream(ba, ChunkHelper.ToBytes(key));
ba.WriteByte(0); // separator
ba.WriteByte(compressed ? (byte)1 : (byte)0);
ba.WriteByte(0); // compression method (always 0)
ChunkHelper.WriteBytesToStream(ba, ChunkHelper.ToBytes(langTag));
ba.WriteByte(0); // separator
ChunkHelper.WriteBytesToStream(ba, ChunkHelper.ToBytesUTF8(translatedTag));
ba.WriteByte(0); // separator
byte[] textbytes = ChunkHelper.ToBytesUTF8(val);
if (compressed)
{
textbytes = ChunkHelper.compressBytes(textbytes, true);
}
ChunkHelper.WriteBytesToStream(ba, textbytes);
byte[] b = ba.ToArray();
ChunkRaw chunk = createEmptyChunk(b.Length, false);
chunk.Data = b;
return(chunk);
}
public override void ParseFromRaw(ChunkRaw c)
{
int nullsFound = 0;
int[] nullsIdx = new int[3];
for (int k = 0; k < c.Data.Length; k++)
{
if (c.Data[k] != 0)
{
continue;
}
nullsIdx[nullsFound] = k;
nullsFound++;
if (nullsFound == 1)
{
k += 2;
}
if (nullsFound == 3)
{
break;
}
}
if (nullsFound != 3)
{
throw new PngjException("Bad formed PngChunkITXT chunk");
}
key = ChunkHelper.ToString(c.Data, 0, nullsIdx[0]);
int i = nullsIdx[0] + 1;
compressed = c.Data[i] == 0 ? false : true;
i++;
if (compressed && c.Data[i] != 0)
{
throw new PngjException("Bad formed PngChunkITXT chunk - bad compression method ");
}
langTag = ChunkHelper.ToString(c.Data, i, nullsIdx[1] - i);
translatedTag = ChunkHelper.ToStringUTF8(c.Data, nullsIdx[1] + 1, nullsIdx[2] - nullsIdx[1] - 1);
i = nullsIdx[2] + 1;
if (compressed)
{
byte[] bytes = ChunkHelper.compressBytes(c.Data, i, c.Data.Length - i, false);
val = ChunkHelper.ToStringUTF8(bytes);
}
else
{
val = ChunkHelper.ToStringUTF8(c.Data, i, c.Data.Length - i);
}
}
public override void ParseFromRaw(ChunkRaw c)
{
int num = 0;
int[] array = new int[3];
for (int i = 0; i < c.Data.Length; i++)
{
if (c.Data[i] == 0)
{
array[num] = i;
num++;
if (num == 1)
{
i += 2;
}
if (num == 3)
{
break;
}
}
}
if (num != 3)
{
throw new PngjException("Bad formed PngChunkITXT chunk");
}
key = ChunkHelper.ToString(c.Data, 0, array[0]);
int num2 = array[0] + 1;
compressed = ((c.Data[num2] != 0) ? true : false);
num2++;
if (compressed && c.Data[num2] != 0)
{
throw new PngjException("Bad formed PngChunkITXT chunk - bad compression method ");
}
langTag = ChunkHelper.ToString(c.Data, num2, array[1] - num2);
translatedTag = ChunkHelper.ToStringUTF8(c.Data, array[1] + 1, array[2] - array[1] - 1);
num2 = array[2] + 1;
if (compressed)
{
byte[] x = ChunkHelper.compressBytes(c.Data, num2, c.Data.Length - num2, compress: false);
val = ChunkHelper.ToStringUTF8(x);
}
else
{
val = ChunkHelper.ToStringUTF8(c.Data, num2, c.Data.Length - num2);
}
}
public override ChunkRaw CreateRawChunk()
{
if (key.Length == 0)
{
throw new PngjException("Text chunk key must be non empty");
}
MemoryStream ba = new MemoryStream();
ChunkHelper.WriteBytesToStream(ba, ChunkHelper.ToBytes(key));
ba.WriteByte(0); // separator
ba.WriteByte(0); // compression method: 0
byte[] textbytes = ChunkHelper.compressBytes(ChunkHelper.ToBytes(val), true);
ChunkHelper.WriteBytesToStream(ba, textbytes);
byte[] b = ba.ToArray();
ChunkRaw chunk = createEmptyChunk(b.Length, false);
chunk.Data = b;
return(chunk);
}
public override ChunkRaw CreateRawChunk()
{
if (key.Length == 0)
{
throw new PngjException("Text chunk key must be non empty");
}
MemoryStream memoryStream = new MemoryStream();
ChunkHelper.WriteBytesToStream(memoryStream, ChunkHelper.ToBytes(key));
memoryStream.WriteByte(0);
memoryStream.WriteByte(0);
byte[] bytes = ChunkHelper.compressBytes(ChunkHelper.ToBytes(val), compress: true);
ChunkHelper.WriteBytesToStream(memoryStream, bytes);
byte[] array = memoryStream.ToArray();
ChunkRaw chunkRaw = createEmptyChunk(array.Length, alloc: false);
chunkRaw.Data = array;
return(chunkRaw);
}
public override void ParseFromRaw(ChunkRaw c)
{
int num = -1;
for (int i = 0; i < c.Data.Length; i++)
{
if (c.Data[i] == 0)
{
num = i;
break;
}
}
if (num < 0 || num > c.Data.Length - 2)
{
throw new PngjException("bad zTXt chunk: no separator found");
}
key = ChunkHelper.ToString(c.Data, 0, num);
if (c.Data[num + 1] != 0)
{
throw new PngjException("bad zTXt chunk: unknown compression method");
}
byte[] x = ChunkHelper.compressBytes(c.Data, num + 2, c.Data.Length - num - 2, compress: false);
val = ChunkHelper.ToString(x);
}
public byte[] GetProfile()
{
return(ChunkHelper.compressBytes(compressedProfile, compress: false));
}
public void SetProfileNameAndContent(string name, byte[] profile)
{
profileName = name;
compressedProfile = ChunkHelper.compressBytes(profile, compress: true);
}