void RandomNoise(ScreenBufferState data, int numNoisePixels)
{
for (int i = 0; i < numNoisePixels; i++)
{
int x = Random.Range(0, (int)data.size.x);
int y = Random.Range(0, (int)data.size.y);
data.SetColorCodeAt(x, y, (ColorCode)Random.Range(0, 15));
}
}
/// Fills the buffer data with values generated by a function of pixel coordinates.
public static void Fill(this ScreenBufferState data, Func <int, int, ColorCode> function)
{
for (int y = 0; y < data.size.y; ++y)
{
for (int x = 0; x < data.size.x; ++x)
{
data.SetColorCodeAt(x, y, function(x, y));
}
}
}
/// Fills the buffer data with a specified color.
public static void Fill(this ScreenBufferState data, ColorCode colorCode)
{
for (int y = 0; y < data.size.y; ++y)
{
for (int x = 0; x < data.size.x; ++x)
{
data.SetColorCodeAt(x, y, colorCode);
}
}
}
/// <summary>
/// Displays a character on the display. Is tied to an aligned grid 4px wide by 8px tall, per original LEM1802 spec.
/// </summary>
/// <remarks>
/// This utilizes the default font set of the LEM1802; manual pixel control is available from the SetPixel call.
/// This code presumes that a display's resolution can be evenly divided into 4px w by 8 px h cells.
/// Original font ripped from https://rdr4g0n.github.io/0x10c_SpriteStudio/.
/// </remarks>
/// <param name="data">The buffer that is being manipulated.</param>
/// <param name="x">The X coordinate of where to render the character.</param>
/// <param name="y">The Y coordinate of where to render the character.</param>
/// <param name="c">The 32 bits that represent pixels of the character being on or off</param>
/// <param name="foreground">The color to use for the positive space (pixels the character fills).</param>
/// <param name="background">The color to use for the negative space (pixels the character doesn't fill.</param>
public static void WriteChar(this ScreenBufferState data, int x, int y, uint character, ColorCode foreground, ColorCode background)
{
// Filter the cell indices, and multiply the amounts by the cell sizes.
x = (x % (data.size.x / 4)) * 4;
y = (y % (data.size.y / 8)) * 8;
for (int i = 31; i >= 0; i--)
{
int pixelX = x + (i / 8), pixelY = y + 7 - (i % 8);
bool filled = ((character >> (31 - i)) & 1) == 1;
data.SetColorCodeAt(pixelX, pixelY, (filled ? foreground : background));
}
}