public Task Render(ICommandDto input, char[] buffer, Rectangle screen, CancellationToken cancellationToken)
{
var square = input as RectCommandDto;
if (square != null)
{
// we consider that a new canvas will need to reset anything that was before
for (int i = square.Y1; i <= square.Y2; i++)
{
for (int j = square.X1; j <= square.X2; j++)
{
// index inside the buffer
var idx = i * screen.Width + j;
// protect against buffer overflow
if (idx >= buffer.Length)
{
break;
}
// is within the expected bounds
switch (square)
{
case var c when(j <= c.X2) && (i == c.Y1 || i == c.Y2):
case var x when(j == x.X1 || j == x.X2) && (i <= x.Y2): {
buffer[idx] = LINE;
}
break;
}
}
}
}
return(Task.FromResult(0));
}
public async Task Render(ICommandDto input, char[] buffer, Rectangle screen, CancellationToken cancellationToken)
{
var fill = input as FillCommandDto;
if (fill != null)
{
int sWidth = screen.Width;
int sHeight = screen.Height;
await CheckAndFill(fill.X, fill.Y, fill.Color, buffer, screen, cancellationToken).ConfigureAwait(false);
}
}
public Task Render(ICommandDto input, char[] buffer, Rectangle screen, CancellationToken cancellationToken)
{
var canvas = input as CanvasCommandDto;
if (canvas != null)
{
int sWidth = screen.Width;
int sHeight = screen.Height;
var cWidth = canvas.Width + 1;
var cHeigth = canvas.Height + 1;
// we consider that a new canvas will need to reset anything that was before
for (int y = 0; y < sHeight; y++)
{
for (int x = 0; x < sWidth; x++)
{
// index inside the buffer
var idx = y * sWidth + x;
// protect against buffer overflow
if (idx >= buffer.Length)
{
break;
}
// reset prev value
buffer[idx] = char.MinValue;
// is within the expected bounds
if ((x <= cWidth) && (y <= cHeigth))
{
switch (canvas)
{
case var c when(x <= cWidth) && (y == 0 || y == cHeigth): {
buffer[idx] = LINE_HORIZONTAL;
}
break;
case var c when(x == 0 || x == cWidth) && (y <= cHeigth): {
buffer[idx] = LINE_VERTICAL;
}
break;
}
}
}
}
}
return(Task.FromResult(0));
}
public Task Render(ICommandDto input, char[] buffer, Rectangle screen, CancellationToken cancellationToken)
{
var line = input as LineCommandDto;
if (line != null)
{
var mx = (line.X1 - line.X2);
var my = (line.Y1 - line.Y2);
// slope
var m = mx == 0 || my == 0 ? 0 : my / mx;
if (mx == 0)
{
// is vertical
for (int y = line.Y1; y <= line.Y2; y++)
{
var x = line.X1;
var idx = y * screen.Width + x;
buffer[idx] = LINE;
}
}
else if (my == 0)
{
// is horizontal
for (int x = line.X1; x <= line.X2; x++)
{
var y = line.Y1;
var idx = y * screen.Width + x;
buffer[idx] = LINE;
}
}
else
{
// we have a slope
for (int x = line.X1; x <= line.X2; x++)
{
var y = GetY(x, m, line.X1, line.Y1);
var idx = y * screen.Width + x;
buffer[idx] = LINE;
}
}
}
return(Task.FromResult(0));
}