public static void TestLedStrip()
{
var exitAnimation = false;
var thread = new Thread(() =>
{
var strip = new LedStrip(60 * 4);
var millisecondsPerFrame = 1000 / 25;
var lastRenderTime = DateTime.UtcNow;
var tailSize = strip.LedCount;
byte red = 0;
while (!exitAnimation)
{
strip.ClearPixels();
red = red >= 254 ? default(byte) : (byte)(red + 1);
for (var i = 0; i < tailSize; i++)
{
strip[i].Brightness = i / (tailSize - 1f);
strip[i].R = red;
strip[i].G = (byte)(255 - red);
strip[i].B = (byte)(strip[i].Brightness * 254);
}
var delayMilliseconds = (int)DateTime.UtcNow.Subtract(lastRenderTime).TotalMilliseconds;
delayMilliseconds = millisecondsPerFrame - delayMilliseconds;
if (delayMilliseconds > 0 && exitAnimation == false)
{
Thread.Sleep(delayMilliseconds);
}
else
{
$"Lagging framerate: {delayMilliseconds} milliseconds".Info();
}
lastRenderTime = DateTime.UtcNow;
strip.Render();
}
strip.ClearPixels();
strip.Render();
});
thread.Start();
Console.Write("Press any key to stop and clear");
Console.ReadKey(true);
Console.WriteLine();
exitAnimation = true;
}
/// <summary>
/// This is a thread worker. It performs the continuous animation until Stop is called.
/// </summary>
private void AnimateContinuosly()
{
var startFrameTime = DateTime.UtcNow;
using (var tickLock = new ManualResetEvent(false))
{
while (IsPendingStop == false)
{
startFrameTime = DateTime.UtcNow;
FrameNumber = (FrameNumber == UInt64.MaxValue) ? 1 : FrameNumber + 1;
lock (SyncLock)
{
CurrentAnimation.PaintNextFrame();
LedStrip.Render();
}
var elapsedToFrame = MillisecondsPerFrame -
Convert.ToInt32(DateTime.UtcNow.Subtract(startFrameTime).TotalMilliseconds);
if (elapsedToFrame <= 0)
{
"Frames are lagging. Increase the frequency or simplify the rendering logic."
.Warn(); // typeof(LedStripWorker));
continue;
}
tickLock.WaitOne(elapsedToFrame);
}
}
}
/// <summary>
/// Should stop the task immediately and synchronously
/// </summary>
public void Stop()
{
lock (SyncLock)
{
if (LedStrip == null)
{
return;
}
IsPendingStop = true;
using (var sleepLock = new ManualResetEvent(false))
{
while (_animationThread.ThreadState == ThreadState.Running)
{
sleepLock.WaitOne(1);
}
}
_animationThread = null;
LedStrip.ClearPixels();
LedStrip.Render();
LedStrip.Render();
LedStrip = null;
}
}
public static void TestLedStripGraphics()
{
BitmapBuffer pixels = null;
try
{
using (var bitmap = new System.Drawing.Bitmap(Path.Combine(Runtime.EntryAssemblyDirectory, "fractal.jpg")))
{
$"Loaded bitmap with format {bitmap.PixelFormat}".Info();
pixels = new BitmapBuffer(bitmap);
$"Loaded Pixel Data: {pixels.Data.Length} bytes".Info();
}
}
catch (Exception ex)
{
$"Error Loading image: {ex.Message}".Error();
}
var exitAnimation = false;
var useDynamicBrightness = false;
var frameRenderTimes = new Queue <int>();
var frameTimes = new Queue <int>();
var thread = new Thread(() =>
{
var strip = new LedStrip(60 * 4, 1, 1000000); // 1 Mhz is sufficient for such a short strip (only 240 LEDs)
var millisecondsPerFrame = 1000 / 25;
var lastRenderTime = DateTime.UtcNow;
var currentFrameNumber = 0;
var currentBrightness = 0.8f;
var currentRow = 0;
var currentDirection = 1;
while (!exitAnimation)
{
// Push pixels into the Frame Buffer
strip.SetPixels(pixels, 0, currentRow, currentBrightness);
// Move the current row slowly at FPS
currentRow += currentDirection;
if (currentRow >= pixels.ImageHeight)
{
currentRow = pixels.ImageHeight - 2;
currentDirection = -1;
}
else if (currentRow <= 0)
{
currentRow = 1;
currentDirection = 1;
}
if (useDynamicBrightness)
{
currentBrightness = 0.05f + 0.80f * (currentRow / (pixels.ImageHeight - 1f));
}
// Stats and sleep time
var delayMilliseconds = (int)DateTime.UtcNow.Subtract(lastRenderTime).TotalMilliseconds;
frameRenderTimes.Enqueue(delayMilliseconds);
delayMilliseconds = millisecondsPerFrame - delayMilliseconds;
if (delayMilliseconds > 0 && exitAnimation == false)
{
Thread.Sleep(delayMilliseconds);
}
else
{
$"Lagging framerate: {delayMilliseconds} milliseconds".Info();
}
frameTimes.Enqueue((int)DateTime.UtcNow.Subtract(lastRenderTime).TotalMilliseconds);
lastRenderTime = DateTime.UtcNow;
// Push the framebuffer to SPI
strip.Render();
if (currentFrameNumber == int.MaxValue)
{
currentFrameNumber = 0;
}
else
{
currentFrameNumber++;
}
if (frameRenderTimes.Count >= 2048)
{
frameRenderTimes.Dequeue();
}
if (frameTimes.Count >= 20148)
{
frameTimes.Dequeue();
}
}
strip.ClearPixels();
strip.Render();
var avg = frameRenderTimes.Average();
$"Frames: {currentFrameNumber + 1}, FPS: {Math.Round((1000f / frameTimes.Average()), 3)}, Strip Render: {Math.Round(avg, 3)} ms, Max FPS: {Math.Round(1000 / avg, 3)}".Info();
strip.Render();
});
thread.Start();
Console.Write("Press any key to stop and clear");
Console.ReadKey(true);
Console.WriteLine();
exitAnimation = true;
}