private static void SetPlainTextExtension(byte[] gifBytes, ref int byteIndex, ref GifData gifData)
{
PlainTextExtension plainTxtEx = new PlainTextExtension();
// Extension Introducer(1 Byte)
// 0x21
plainTxtEx.m_extensionIntroducer = gifBytes[byteIndex];
byteIndex++;
// Plain Text Label(1 Byte)
// 0x01
plainTxtEx.m_plainTextLabel = gifBytes[byteIndex];
byteIndex++;
// Block Size(1 Byte)
// 0x0c
plainTxtEx.m_blockSize = gifBytes[byteIndex];
byteIndex++;
// Text Grid Left Position(2 Bytes)
// Not supported
byteIndex += 2;
// Text Grid Top Position(2 Bytes)
// Not supported
byteIndex += 2;
// Text Grid Width(2 Bytes)
// Not supported
byteIndex += 2;
// Text Grid Height(2 Bytes)
// Not supported
byteIndex += 2;
// Character Cell Width(1 Bytes)
// Not supported
byteIndex++;
// Character Cell Height(1 Bytes)
// Not supported
byteIndex++;
// Text Foreground Color Index(1 Bytes)
// Not supported
byteIndex++;
// Text Background Color Index(1 Bytes)
// Not supported
byteIndex++;
// Block Size & Plain Text Data List
while (true)
{
// Block Size(1 Byte)
byte blockSize = gifBytes[byteIndex];
byteIndex++;
if (blockSize == 0x00)
{
// Block Terminator(1 Byte)
break;
}
var plainTextDataBlock = new PlainTextExtension.PlainTextDataBlock();
plainTextDataBlock.m_blockSize = blockSize;
// Plain Text Data(n Byte)
plainTextDataBlock.m_plainTextData = new byte[plainTextDataBlock.m_blockSize];
for (int i = 0; i < plainTextDataBlock.m_plainTextData.Length; i++)
{
plainTextDataBlock.m_plainTextData[i] = gifBytes[byteIndex];
byteIndex++;
}
if (plainTxtEx.m_plainTextDataList == null)
{
plainTxtEx.m_plainTextDataList = new List <PlainTextExtension.PlainTextDataBlock>();
}
plainTxtEx.m_plainTextDataList.Add(plainTextDataBlock);
}
if (gifData.m_plainTextExList == null)
{
gifData.m_plainTextExList = new List <PlainTextExtension>();
}
gifData.m_plainTextExList.Add(plainTxtEx);
}
static void SetPlainTextExtension (byte[] gifBytes, ref int byteIndex, ref GifData gifData)
{
PlainTextExtension plainTxtEx = new PlainTextExtension ();
// Extension Introducer(1 Byte)
// 0x21
plainTxtEx.extensionIntroducer = gifBytes[byteIndex];
byteIndex++;
// Plain Text Label(1 Byte)
// 0x01
plainTxtEx.plainTextLabel = gifBytes[byteIndex];
byteIndex++;
// Block Size(1 Byte)
// 0x0c
plainTxtEx.blockSize = gifBytes[byteIndex];
byteIndex++;
// Text Grid Left Position(2 Bytes)
// Not supported
byteIndex += 2;
// Text Grid Top Position(2 Bytes)
// Not supported
byteIndex += 2;
// Text Grid Width(2 Bytes)
// Not supported
byteIndex += 2;
// Text Grid Height(2 Bytes)
// Not supported
byteIndex += 2;
// Character Cell Width(1 Bytes)
// Not supported
byteIndex++;
// Character Cell Height(1 Bytes)
// Not supported
byteIndex++;
// Text Foreground Color Index(1 Bytes)
// Not supported
byteIndex++;
// Text Background Color Index(1 Bytes)
// Not supported
byteIndex++;
// Block Size & Plain Text Data List
while (true) {
// Block Size(1 Byte)
byte blockSize = gifBytes[byteIndex];
byteIndex++;
if (blockSize == 0x00) {
// Block Terminator(1 Byte)
break;
}
var plainTextDataBlock = new PlainTextExtension.PlainTextDataBlock ();
plainTextDataBlock.blockSize = blockSize;
// Plain Text Data(n Byte)
plainTextDataBlock.plainTextData = new byte[plainTextDataBlock.blockSize];
for (int i = 0; i < plainTextDataBlock.plainTextData.Length; i++) {
plainTextDataBlock.plainTextData[i] = gifBytes[byteIndex];
byteIndex++;
}
if (plainTxtEx.plainTextDataList == null) {
plainTxtEx.plainTextDataList = new List<PlainTextExtension.PlainTextDataBlock> ();
}
plainTxtEx.plainTextDataList.Add (plainTextDataBlock);
}
if (gifData.plainTextExList == null) {
gifData.plainTextExList = new List<PlainTextExtension> ();
}
gifData.plainTextExList.Add (plainTxtEx);
}
