private byte[] GetColor(InkyPixelColour colour)
{
return((colour, _displayColour) switch
{
(InkyPixelColour.Black, _) => new byte[] { 0, 0, 0, 255 },
(InkyPixelColour.White, _) => new byte[] { 255, 255, 255, 255 },
(InkyPixelColour.Red, InkyDisplayColour.Black) => new byte[] { 0, 0, 0, 255 },
(InkyPixelColour.Red, InkyDisplayColour.Yellow) => new byte[] { 255, 215, 0, 255 },
(InkyPixelColour.Red, _) => new byte[] { 139, 0, 0, 255 },
(_, _) => throw new InvalidOperationException(),
});
/// <summary>
/// Write a string to the screen
/// </summary>
/// <param name="inky">Inky driver</param>
/// <param name="x">The x pixel position</param>
/// <param name="y">The y pixel position</param>
/// <param name="colour">The colour of the text</param>
/// <param name="font">The font used</param>
/// <param name="text">The text to be displayed</param>
/// <param name="spacing">Default space width</param>
/// <returns>The bottom right corner of the text</returns>
public static (int x, int y) DrawString(this IInkyDriver inky, int x, int y, InkyPixelColour colour, Dictionary <char, bool[, ]> font, string text, int spacing = 2)
{
if (inky is null)
{
throw new ArgumentNullException(nameof(inky));
}
if (font is null)
{
throw new ArgumentNullException(nameof(font));
}
if (text is null)
{
return(x, y);
}
var xp = x;
var yp = y;
for (var ci = 0; ci < text.Length; ci++)
{
var c = text[ci];
if (!font.TryGetValue(c, out var map))
{
if (!font.TryGetValue('_', out map))
{
continue;
}
}
if (c == ' ')
{
xp += map.GetLength(0) / 3;
yp = y + map.GetLength(0);
continue;
}
for (int i = 0; i < map.GetLength(0); i++)
{
for (int j = 0; j < map.GetLength(1); j++)
{
if (map[i, j])
{
inky.TrySetPixel(xp + j, y + i, colour);
}
}
}
xp += map.GetLength(1) + spacing;
yp = y + map.GetLength(0);
}
return(xp, yp);
}
/// <summary>
/// Try set the inky buffer pixel, as long as it's within the bounds of the screen
/// </summary>
/// <param name="inky">Inky driver</param>
/// <param name="x">The x pixel position</param>
/// <param name="y">The y pixel position</param>
/// <param name="colour">The colour to set the pixel to</param>
/// <returns>True if the pixel coordinates were within the bounds of the screen</returns>
public static bool TrySetPixel(this IInkyDriver inky, int x, int y, InkyPixelColour colour)
{
if (inky is null)
{
throw new ArgumentNullException(nameof(inky));
}
if (x < 0 || y < 0 || x >= inky.Width || y >= inky.Height)
{
return(false);
}
inky.SetPixel(x, y, colour);
return(true);
}
/// <summary>
/// Draw a rectangle on the inky buffer
/// </summary>
/// <param name="inky">Inky driver</param>
/// <param name="x1">The x pixel position of one corner</param>
/// <param name="y1">The y pixel position of one corner</param>
/// <param name="x2">The x pixel position of the opposite corner</param>
/// <param name="y2">The y pixel position of the opposite corner</param>
/// <param name="borderColour">The border colour of the rectangle</param>
/// <param name="fillColour">The fill colour of the rectangle (optional)</param>
public static void DrawRectangle(this IInkyDriver inky, int x1, int y1, int x2, int y2, InkyPixelColour borderColour, InkyPixelColour?fillColour = null)
{
if (inky is null)
{
throw new ArgumentNullException(nameof(inky));
}
for (var i = Math.Min(x1, x2); i <= Math.Max(x1, x2); i++)
{
inky.SetPixel(i, y1, borderColour);
if (y1 != y2)
{
inky.SetPixel(i, y2, borderColour);
}
}
for (var i = Math.Min(y1, y2); i <= Math.Max(y1, y2); i++)
{
inky.SetPixel(x1, i, borderColour);
if (x1 != x2)
{
inky.SetPixel(x2, i, borderColour);
}
}
if (fillColour.HasValue && Math.Abs(x2 - x1) > 1 && Math.Abs(y2 - y1) > 1)
{
for (var i = Math.Min(x1, x2) + 1; i < Math.Max(x1, x2); i++)
{
for (var j = Math.Min(y1, y2) + 1; j < Math.Max(y1, y2); j++)
{
inky.SetPixel(i, j, fillColour.Value);
}
}
}
}
