private static (VncEncodeAbstract encode, int length) createVncEncodeFromBinarySub(byte[] a_body, int a_basePos, byte a_bytesPerPixel, bool a_isBigendian, ZrleDataReader a_zrleReader)
{
UInt16 x = BigEndianBitConverter.ToUInt16(a_body, a_basePos + 0);
UInt16 y = BigEndianBitConverter.ToUInt16(a_body, a_basePos + 2);
UInt16 w = BigEndianBitConverter.ToUInt16(a_body, a_basePos + 4);
UInt16 h = BigEndianBitConverter.ToUInt16(a_body, a_basePos + 6);
var encodeType = (VncEnum.EncodeType)BigEndianBitConverter.ToInt32(a_body, a_basePos + 8);
int offset;
switch (encodeType)
{
case VncEnum.EncodeType.Raw:
return(new VncEncodeRaw(x, y, w, h, a_body, a_basePos + 12), 12 + w * h * a_bytesPerPixel);
case VncEnum.EncodeType.CopyRect:
UInt16 sx = BigEndianBitConverter.ToUInt16(a_body, a_basePos + 12);
UInt16 sy = BigEndianBitConverter.ToUInt16(a_body, a_basePos + 14);
return(new VncEncodeCopyRect(x, y, w, h, sx, sy), 12 + 4);
case VncEnum.EncodeType.RRE:
// Read header
UInt32 numberOfSubrectangles = BigEndianBitConverter.ToUInt32(a_body, a_basePos + 12);
byte[] backgroundPixelValue = VncPixelByteGetter.GetPixelByte(a_bytesPerPixel, a_body, a_basePos + 16);
// Create subrectangles
int subrectSize = a_bytesPerPixel + 8;
var subrectangles = new VncEncodeRreSubrectangle[numberOfSubrectangles];
for (int i = 0; i < numberOfSubrectangles; ++i)
{
offset = a_basePos + subrectSize * i;
byte[] pixel = VncPixelByteGetter.GetPixelByte(a_bytesPerPixel, a_body, (16 + a_bytesPerPixel) + 0 + offset);
UInt16 xpos = BigEndianBitConverter.ToUInt16(a_body, (16 + a_bytesPerPixel + a_bytesPerPixel) + 0 + offset);
UInt16 ypos = BigEndianBitConverter.ToUInt16(a_body, (16 + a_bytesPerPixel + a_bytesPerPixel) + 2 + offset);
UInt16 width = BigEndianBitConverter.ToUInt16(a_body, (16 + a_bytesPerPixel + a_bytesPerPixel) + 4 + offset);
UInt16 height = BigEndianBitConverter.ToUInt16(a_body, (16 + a_bytesPerPixel + a_bytesPerPixel) + 6 + offset);
subrectangles[i] = new VncEncodeRreSubrectangle(pixel, xpos, ypos, width, height);
}
int len = 12 + (4 + a_bytesPerPixel) + (a_bytesPerPixel + 2 + 2 + 2 + 2) * (int)numberOfSubrectangles;
return(new VncEncodeRre(x, y, w, h, backgroundPixelValue, subrectangles), len);
case VncEnum.EncodeType.Hextile:
int xTileCount = (int)Math.Ceiling(w / 16.0);
int yTileCount = (int)Math.Ceiling(h / 16.0);
var hextiles = new IVncEncodeHextileTile[xTileCount * yTileCount];
// Loop for each tile
offset = a_basePos + 12;
int index = 0;
byte[] backgroundPixel = null;
byte[] foregroundPixel = null;
for (int ytile = 0; ytile < yTileCount; ++ytile)
{
int tileHeight = ((ytile == yTileCount - 1) && ((h % 16) != 0)) ? h % 16 : 16;
for (int xtile = 0; xtile < xTileCount; ++xtile, ++index)
{
int tileWidth = ((xtile == xTileCount - 1) && ((w % 16) != 0)) ? w % 16 : 16;
// Read header
var subencodingMask = new VncEncodeHextileSubencodingMask(a_body[offset]);
++offset;
if (subencodingMask.Raw)
{
// Raw pixel data
hextiles[index] = new VncEncodeHextileTileRaw(a_body, offset);
offset += tileWidth * tileHeight * a_bytesPerPixel;
}
else
{
// Read BackgroundSpecified if needed
if (subencodingMask.BackgroundSpecified)
{
backgroundPixel = VncPixelByteGetter.GetPixelByte(a_bytesPerPixel, a_body, offset);
offset += a_bytesPerPixel;
}
// Read ForegroundSpecified if needed
if (subencodingMask.ForegroundSpecified)
{
foregroundPixel = VncPixelByteGetter.GetPixelByte(a_bytesPerPixel, a_body, offset);
offset += a_bytesPerPixel;
}
// Subrects
VncEncodeHextileSubrect[] hextileSubrect;
if (subencodingMask.AnySubrects)
{
// Read number-of-subrectangles
byte numberOfSubrectanglesHextile = a_body[offset];
++offset;
// Read subrectangle
hextileSubrect = new VncEncodeHextileSubrect[numberOfSubrectanglesHextile];
if (subencodingMask.SubrectsColored)
{
for (int i = 0; i < numberOfSubrectanglesHextile; ++i)
{
hextileSubrect[i] = new VncEncodeHextileSubrect(VncPixelByteGetter.GetPixelByte(a_bytesPerPixel, a_body, offset),
a_body[offset + a_bytesPerPixel],
a_body[offset + a_bytesPerPixel + 1]);
offset += a_bytesPerPixel + 2;
}
}
else
{
for (int i = 0; i < numberOfSubrectanglesHextile; ++i)
{
hextileSubrect[i] = new VncEncodeHextileSubrect(foregroundPixel, a_body[offset + 0], a_body[offset + 1]);
offset += 2;
}
}
}
else
{
// Set empty subrects
hextileSubrect = new VncEncodeHextileSubrect[0];
}
hextiles[index] = new VncEncodeHextileTileRre(backgroundPixel, hextileSubrect);
}
}
}
return(new VncEncodeHextile(x, y, w, h, hextiles), offset - a_basePos);
case VncEnum.EncodeType.ZRLE:
int zrleLength = BigEndianBitConverter.ToInt32(a_body, a_basePos + 12);
return(new VncEncodeZrle(x, y, w, h, a_body, a_basePos + 16, zrleLength, a_zrleReader), 12 + 4 + zrleLength);
case VncEnum.EncodeType.Cursor:
case VncEnum.EncodeType.DesktopSize:
default:
throw new NotSupportedException($"Encode type ({encodeType}) is Not supported.");
}
}
private static List <byte[]> createVncEncodeBinaryFromStreamSub(Stream a_stream, byte a_bytesPerPixel, bool a_isBigendian)
{
// Add the read data to this list.
var readDataList = new List <byte[]>();
// Local function for Reading and Storing
void readAndStore(byte[] a_buffer, int a_offset, int a_count)
{
a_stream.ReadAll(a_buffer, a_offset, a_count);
readDataList.Add(a_buffer);
};
byte[] header = new byte[12];
readAndStore(header, 0, header.Length);
UInt16 x = BigEndianBitConverter.ToUInt16(header, 0);
UInt16 y = BigEndianBitConverter.ToUInt16(header, 2);
UInt16 w = BigEndianBitConverter.ToUInt16(header, 4);
UInt16 h = BigEndianBitConverter.ToUInt16(header, 6);
var encodeType = (VncEnum.EncodeType)BigEndianBitConverter.ToInt32(header, 8);
switch (encodeType)
{
case VncEnum.EncodeType.Raw:
byte[] rawPixel = new byte[w * h * a_bytesPerPixel];
readAndStore(rawPixel, 0, rawPixel.Length);
break;
case VncEnum.EncodeType.CopyRect:
byte[] copyRectPixel = new byte[4];
readAndStore(copyRectPixel, 0, copyRectPixel.Length);
break;
case VncEnum.EncodeType.RRE:
// Read header
byte[] rreHeader = new byte[4 + a_bytesPerPixel];
readAndStore(rreHeader, 0, rreHeader.Length);
UInt32 numberOfSubrectangles = BigEndianBitConverter.ToUInt32(rreHeader, 0);
// Read subrectangles
int subrectSize = a_bytesPerPixel + 8;
byte[] rreSubrectangles = new byte[subrectSize * numberOfSubrectangles];
readAndStore(rreSubrectangles, 0, rreSubrectangles.Length);
break;
case VncEnum.EncodeType.Hextile:
int xTileCount = (int)Math.Ceiling(w / 16.0);
int yTileCount = (int)Math.Ceiling(h / 16.0);
// Loop for each tile
int index = 0;
for (int ytile = 0; ytile < yTileCount; ++ytile)
{
int tileHeight = ((ytile == yTileCount - 1) && ((h % 16) != 0)) ? h % 16 : 16;
for (int xtile = 0; xtile < xTileCount; ++xtile, ++index)
{
int tileWidth = ((xtile == xTileCount - 1) && ((w % 16) != 0)) ? w % 16 : 16;
// Read header
byte[] subencodingMaskBuffer = new byte[1];
readAndStore(subencodingMaskBuffer, 0, subencodingMaskBuffer.Length);
var subencodingMask = new VncEncodeHextileSubencodingMask(subencodingMaskBuffer[0]);
if (subencodingMask.Raw)
{
// Read raw pixel data
byte[] tilesRawPixel = new byte[tileWidth * tileHeight * a_bytesPerPixel];
readAndStore(tilesRawPixel, 0, tilesRawPixel.Length);
}
else
{
// Read BackgroundSpecified if needed
if (subencodingMask.BackgroundSpecified)
{
byte[] backgroundPixelBuffer = new byte[a_bytesPerPixel];
readAndStore(backgroundPixelBuffer, 0, backgroundPixelBuffer.Length);
}
// Read ForegroundSpecified if needed
if (subencodingMask.ForegroundSpecified)
{
byte[] foregroundPixelBuffer = new byte[a_bytesPerPixel];
readAndStore(foregroundPixelBuffer, 0, foregroundPixelBuffer.Length);
}
// Subrects
if (subencodingMask.AnySubrects)
{
// Read number-of-subrectangles
byte[] numberOfSubrectanglesHextileBuffer = new byte[1];
readAndStore(numberOfSubrectanglesHextileBuffer, 0, numberOfSubrectanglesHextileBuffer.Length);
byte numberOfSubrectanglesHextile = numberOfSubrectanglesHextileBuffer[0];
// Read subrectangle
if (subencodingMask.SubrectsColored)
{
for (int i = 0; i < numberOfSubrectanglesHextile; ++i)
{
byte[] hextileSubrectBuffer = new byte[a_bytesPerPixel + 2];
readAndStore(hextileSubrectBuffer, 0, hextileSubrectBuffer.Length);
}
}
else
{
for (int i = 0; i < numberOfSubrectanglesHextile; ++i)
{
byte[] hextileSubrectBuffer = new byte[2];
readAndStore(hextileSubrectBuffer, 0, hextileSubrectBuffer.Length);
}
}
}
}
}
}
break;
case VncEnum.EncodeType.ZRLE:
// Read length
byte[] zrleLengthBuffer = new byte[4];
readAndStore(zrleLengthBuffer, 0, zrleLengthBuffer.Length);
UInt32 zrleLength = BigEndianBitConverter.ToUInt32(zrleLengthBuffer, 0);
// Read zlib data
byte[] zrleZlibData = new byte[zrleLength];
readAndStore(zrleZlibData, 0, zrleZlibData.Length);
break;
case VncEnum.EncodeType.Cursor:
case VncEnum.EncodeType.DesktopSize:
default:
throw new NotSupportedException($"Encode type ({encodeType}) is Not supported.");
}
return(readDataList);
}
