/// <summary>
/// Reads cell matrix form the output buffer using the provided rectangle.
/// </summary>
/// <param name="region"></param>
/// <returns></returns>
public CellBuffer ReadOutput(Region region)
{
var handle = GetOutputBuffer();
//Get len of X coordinate, the plan here is to partition by Y
var sizeOfX = (region.Width - region.Left + 1) * 4;
//partition by Y coordinate.
var partitionY = (int)Math.Ceiling((decimal)(maxBufferSize / sizeOfX));
int sizeOfY = (region.Height - region.Top);
//if Y is smaller then the partition by Y then we need
//to set the partiton size to Y size.
if (sizeOfY < partitionY)
{
partitionY = sizeOfY;
}
ConsoleHostNativeMethods.COORD bufferCoord = new ConsoleHostNativeMethods.COORD();
bufferCoord.X = 0;
bufferCoord.Y = 0;
ConsoleHostNativeMethods.COORD bufferSize = new ConsoleHostNativeMethods.COORD();
bufferSize.X = (short)(region.Width - region.Left);
CellBuffer cells = new CellBuffer(sizeOfY, bufferSize.X);
int cursor = 0;
int i = 0;
do
{
i += partitionY;
//the size of the Y coordinate is always the size of the buffer.
bufferSize.X = (short)(region.Width - region.Left);
bufferSize.Y = (short)partitionY;
//If we exceeded the maximum size of the buffer we need to substract to the size of the remaining buffer.
if (i > sizeOfY)
{
int diff = i - sizeOfY;
bufferSize.Y = (short)(partitionY - diff);
}
//Fill the buffer part.
ConsoleHostNativeMethods.SMALL_RECT readRegion = new ConsoleHostNativeMethods.SMALL_RECT();
readRegion.Left = (short)region.Left;
readRegion.Top = (short)region.Top;
readRegion.Right = (short)(region.Left + bufferSize.X);
readRegion.Bottom = (short)(region.Top + bufferSize.Y);
ConsoleHostNativeMethods.CHAR_INFO[] buffer = new ConsoleHostNativeMethods.CHAR_INFO[bufferSize.X * bufferSize.Y];
buffer = DotConsoleNative.ReadConsoleOutput(handle, buffer, bufferSize, bufferCoord, ref readRegion);
//Fill the output buffer cells.
int idx = 0;
for (int k = cursor; k < bufferSize.Y; k++)
{
for (int n = 0; n < bufferSize.X; n++)
{
cells.Cells[k, n].Attributes = buffer[idx].Attributes;
cells.Cells[k, n].Char = buffer[idx].UnicodeChar;
idx++;
}
cursor = k;
}
}while (i < sizeOfY);
return(cells);
}
public void WriteOutput(Coordinates orgin, CellBuffer cellBuffer)
{
var handle = GetOutputBuffer();
//Get len of X coordinate, the plan here is to partition by Y
var sizeOfX = cellBuffer.GetLengthOfX() * 4;
//partition by Y coordinate.
int partitionY = (int)Math.Ceiling((decimal)(maxBufferSize / sizeOfX));
var sizeOfY = cellBuffer.GetLengthOfY();
//if Y is smaller then the partition by Y then we need
//to set the partiton size to Y size.
if (sizeOfY < partitionY)
{
partitionY = sizeOfY;
}
//Get partitoned buffer size.
int charBufferSize = (int)(partitionY * cellBuffer.GetLengthOfX());
int cursor = 0;
int i = 0;
do
{
i += partitionY;
//If we exceeded the maximum size of the buffer we need to substract to the size of the remaining buffer.
if (i > sizeOfY)
{
int diff = i - sizeOfY;
i = i - diff;
}
//Fill the buffer part.
ConsoleHostNativeMethods.CHAR_INFO[] buffer = new ConsoleHostNativeMethods.CHAR_INFO[charBufferSize];
int idx = 0;
for (int y = cursor; y < i; y++)
{
for (int x = 0; x < cellBuffer.GetLengthOfX(); x++)
{
var cellToWrite = cellBuffer[y, x];
if (cellToWrite.Attributes == 0)
{
//Don't set the foreground color for empty cells this will force the ConsoleHost
//to do a very expensive calculation for each cell and slow things down.
cellToWrite.Attributes = (ushort)DotConsoleNative.ToNativeConsoleColor(0, BackgroundColor);
}
buffer[idx].Attributes = cellToWrite.Attributes;
buffer[idx].UnicodeChar = cellToWrite.Char;
idx++;
}
}
ConsoleHostNativeMethods.COORD bufferSize = new ConsoleHostNativeMethods.COORD();
bufferSize.X = (short)cellBuffer.GetLengthOfX();
bufferSize.Y = (short)partitionY;
ConsoleHostNativeMethods.COORD bufferCoord = new ConsoleHostNativeMethods.COORD();
bufferCoord.X = 0;
bufferCoord.Y = 0;
ConsoleHostNativeMethods.SMALL_RECT writeRegion = new ConsoleHostNativeMethods.SMALL_RECT();
writeRegion.Left = (short)orgin.X;
writeRegion.Top = (short)(orgin.Y + cursor);
writeRegion.Right = (short)(orgin.X + bufferSize.X);
writeRegion.Bottom = (short)(orgin.Y + cursor + bufferSize.Y);
DotConsoleNative.WriteConsoleOutput(handle, buffer, bufferSize, bufferCoord, ref writeRegion);
cursor = i;
}while (i < sizeOfY);
}