/// <summary>
/// Clears the button at the given index and moves it to the endIdx-1 position.
/// </summary>
/// <param name="screenIdx">The index of the button to clear.</param>
public void ClearBtn(int screenIdx)
{
if (screenIdx < startIdx || screenIdx >= endIdx)
{
throw new IndexOutOfRangeException("Index for this button manager must be in [" + startIdx + ", " + (endIdx - 1) + "], was " + screenIdx);
}
try
{
clickLock.WaitOne();
for (int i = screenIdx + 1; i < endIdx; i++)
{
GetBtn(i).SetIndex(i - 1);
}
BtnProps btn = btns[screenIdx];
btns.RemoveAt(screenIdx);
btns.Insert(endIdx - 1, btn);
btn.SetIndex(endIdx - 1);
btn.SetImage(null);
}
finally
{
clickLock.ReleaseMutex();
}
}
private static void CalculateNextDrawCommand(uint colSpan, uint rowSpan, BtnProps btn, int res, int[] line)
{
Bitmap img = btn.screenImg;
for (uint col = 0; col < line.Length; col++)
{
int x = (int)(col * colSpan);
if (colSpan == 1 && rowSpan == 1)
{
// nothing to average for a 1x1 square of color
line[col] = ImageMagic.ColorConvertColorToInt(img.GetPixel(x, (int)btn.rowIdx[res]));
}
else if (colSpan * rowSpan < 625_000) // arbitrary 10MB limit
{
// calculate the median color
List <Tuple <Color, int> > colorSwatch = new List <Tuple <Color, int> >((int)(colSpan * rowSpan));
colorSwatch.OrderBy(t => t.Item2);
for (int i = 0; i < colSpan; i++)
{
for (int j = 0; j < rowSpan; j++)
{
int y = (int)(btn.rowIdx[res] * rowSpan);
Color color = img.GetPixel(x + i, y + j);
int intensity = color.R + color.G + color.B;
colorSwatch.Add(new Tuple <Color, int>(color, intensity));
}
}
Color c = colorSwatch[colorSwatch.Count / 2].Item1;
line[col] = ImageMagic.ColorConvertColorToInt(c);
}
else
{
// calculate the average color
ulong[] uc = new ulong[4];
for (int i = 0; i < colSpan; i++)
{
for (int j = 0; j < rowSpan; j++)
{
int y = (int)(btn.rowIdx[res] * rowSpan);
Color color = img.GetPixel(x + i, y + j);
uc[0] += color.R;
uc[1] += color.G;
uc[2] += color.B;
}
}
uint pixelCnt = colSpan * rowSpan;
uint r = (uint)uc[0] / pixelCnt;
uint g = (uint)uc[1] / pixelCnt;
uint b = (uint)uc[2] / pixelCnt;
line[col] = ImageMagic.ColorConvertRGBTo24(r, g, b);
}
}
}
/// <summary>
/// Queues up an image to be drawn to an Arduino screen.
/// A low-res image (8x8) will be loaded first and in reverse queue order for speed,
/// then a medium-res image (40x32) will be loaded in queue order,
/// then finally a full-res image (160x128) will be loaded in queue order.
///
/// Queueing up a new image for the same screen will
/// restart the process imediately and the old image data
/// will be forgotten.
/// </summary>
/// <param name="screenIdx">The screen to draw to.</param>
/// <param name="updateLowRes">True to push the image for the given screen in low resolution to the <see cref="comm"/></param>
/// <param name="updateMedRes">True to push the image for the given screen in medium resolution to the <see cref="comm"/></param>
/// <param name="updateHighRes">True to push the image for the given screen in high resolution to the <see cref="comm"/></param>
public void QueueImage(int screenIdx, bool updateLowRes = true, bool updateMedRes = true, bool updateHighRes = true)
{
try
{
queueMutex.WaitOne();
// discard previous updates
if (updateLowRes)
{
lowResUpdates.Remove(screenIdx);
}
if (updateMedRes)
{
medResUpdates.Remove(screenIdx);
}
if (updateHighRes)
{
highResUpdates.Remove(screenIdx);
}
// add new update
if (updateLowRes)
{
lowResUpdates.Add(screenIdx);
}
if (updateMedRes)
{
medResUpdates.Insert(0, screenIdx);
}
if (updateHighRes)
{
highResUpdates.Insert(0, screenIdx);
}
// reset the rowIdx for the updates, as necessary
BtnProps btn = btns[screenIdx];
if (updateLowRes)
{
btn.rowIdx[0] = 0;
}
if (updateMedRes)
{
btn.rowIdx[1] = 0;
}
if (updateHighRes)
{
btn.rowIdx[2] = 0;
}
}
finally
{
queueMutex.ReleaseMutex();
}
}
public BtnProps GetBtn(int screenIdx)
{
if (screenIdx < startIdx || screenIdx >= endIdx)
{
throw new IndexOutOfRangeException("Index for this button manager must be in [" + startIdx + ", " + (endIdx - 1) + "], was " + screenIdx);
}
BtnProps btn = btns[screenIdx];
if (btn.idx != screenIdx)
{
throw new InvalidOperationException("The button at index " + screenIdx + " has an internally registered index of " + screenIdx);
}
return(btn);
}
/// <summary>
/// Draws lines from the images waiting in the update stacks/queues.
/// Only draws one line of the most low-res image to keep the thread responsive.
/// </summary>
/// <returns>True when an update succeeds or there is no update to do, false when an update fails.</returns>
public bool Update()
{
uint colSpan = 0;
uint rowSpan = 0;
int screenIdx = -1;
BtnProps btn = null;
Bitmap img = null;
int res = 0; // low (0), med (1), high (2)
try
{
queueMutex.WaitOne();
// get the quality to draw a line at
screenIdx = -1;
btn = null;
if (lowResUpdates.Count > 0)
{
colSpan = 20;
rowSpan = 16;
screenIdx = lowResUpdates[0];
btn = btns[screenIdx];
res = 0;
if ((btn.rowIdx[res] + 1) * rowSpan == btn.screenHeight)
{
lowResUpdates.RemoveAt(0);
}
if (btn.rowIdx[res] == 0)
{
Console.WriteLine($"drawing low-rez {screenIdx}");
}
}
else if (medResUpdates.Count > 0)
{
colSpan = 4;
rowSpan = 4;
screenIdx = medResUpdates[medResUpdates.Count - 1];
btn = btns[screenIdx];
res = 1;
if ((btn.rowIdx[res] + 1) * rowSpan == btn.screenHeight)
{
medResUpdates.RemoveAt(medResUpdates.Count - 1);
}
if (btn.rowIdx[res] == 0)
{
Console.WriteLine($"drawing med-rez {screenIdx}");
}
}
else if (highResUpdates.Count > 0)
{
colSpan = 1;
rowSpan = 1;
screenIdx = highResUpdates[highResUpdates.Count - 1];
btn = btns[screenIdx];
res = 2;
if ((btn.rowIdx[res] + 1) * rowSpan == btn.screenHeight)
{
highResUpdates.RemoveAt(highResUpdates.Count - 1);
}
if (btn.rowIdx[res] == 0)
{
Console.WriteLine($"drawing high-rez {screenIdx}");
}
}
// for images we can't update, pretend like we did an update
if (btn == null || btn.comm == null)
{
if (btn != null)
{
btn.rowIdx[res]++;
}
return(true);
}
// get the image
img = btn.screenImg;
// calculate the line to draw
int[] line = new int[btn.screenWidth / colSpan];
CalculateNextDrawCommand(colSpan, rowSpan, btn, res, line);
// draw the line
if (btn.rowIdx[res] == 0)
{
swFrame.Restart();
}
if (!btn.comm.SendImageRow(line, btn.rowIdx[res], rowSpan, btn))
{
return(false);
}
// prepare for next time this function is called
btn.rowIdx[res]++;
if (btn.rowIdx[res] * rowSpan >= btn.screenHeight)
{
btn.rowIdx[res] = 0;
Console.WriteLine(swFrame.ElapsedMilliseconds);
}
}
finally
{
queueMutex.ReleaseMutex();
}
return(true);
}
/// <summary> /// Tries to send an image to the /// </summary> /// <param name="row">The row data to draw.</param> /// <param name="startRow">The starting y-index of the row (top).</param> /// <param name="rowSpan">The number of vertical pixels to draw this same row over (aka inverse of img resolution).</param> /// <returns>True on success, false on failure. If false, then the device is most likely disconnected.</returns> public abstract bool SendImageRow(int[] row, uint startRow, uint rowSpan, BtnProps btn);
public override bool SendImageRow(int[] line, uint startRow, uint rowSpan, BtnProps btn)
{
Stopwatch timer = new Stopwatch();
timer.Start();
int idx = 0;
// check that WIDTH is a multiple of the line length
uint colSpan = screenWidth / (uint)line.Length;
if (line.Length * colSpan != screenWidth)
{
throw new ArgumentException($"The display width ({screenWidth}) must be a multiple of the line length ({line.Length})");
}
// send packetized data
if (startRow == 0)
{
byte[] restart = new byte[62]; // buffer to be sent
idx = BitBashing.UIntToDecimalBytes(ref restart, 0, 2, 0);
restart[idx++] = Convert.ToByte(':');
restart[idx++] = Convert.ToByte('R'); // "Reset Draw" command
restart[idx++] = Convert.ToByte('L');
if (waitingForAck)
{
WaitForAck(1000);
}
if (!CheckedWrite(restart, 0, idx))
{
return(false);
}
waitingForAck = true;
}
// send colSpan and rowSpan
byte[] spans = new byte[62]; // buffer to be sent
idx = BitBashing.SIntToDecimalBytes(ref spans, 0, 5, 0);
spans[idx++] = Convert.ToByte(':');
spans[idx++] = Convert.ToByte('S'); // "Span Size" command
idx += BitBashing.UIntToHexBytes(ref spans, idx, colSpan, 2, 2);
idx += BitBashing.UIntToHexBytes(ref spans, idx, rowSpan, 2, 2);
if (waitingForAck)
{
WaitForAck(1000);
}
if (!CheckedWrite(spans, 0, idx))
{
return(false);
}
waitingForAck = true;
// determine the necessity of a palette and send the palette
bool usePalette = btn.palette != null && colSpan < 16 && rowSpan < 16;
if (usePalette && startRow == 0 && btn.doUpdatePalette)
{
SendColorPalette(btn.palette);
btn.SetDoUpdatePalette(false);
}
// send packetized line color data
byte[] linePart = new byte[62]; // buffer to be sent
int linePartLen; // packetized line message length
int bytesPerPixel = (usePalette) ? 1 : 2;
linePartLen = (int)(56 / bytesPerPixel);
char command = (usePalette) ? 'l' : 'L';
for (int i = 0; i < line.Length; i += linePartLen)
{
int sendCnt = Math.Min(linePartLen, line.Length - i);
// prepare the message header
int pixelCnt = (usePalette) ? sendCnt : sendCnt * bytesPerPixel;
idx = BitBashing.SIntToDecimalBytes(ref linePart, 0, pixelCnt + 1, 0);
linePart[idx++] = Convert.ToByte(':');
linePart[idx++] = Convert.ToByte(command); // "Line Part" or "line (palette) Part" command
// add the color values
for (int j = 0; j < sendCnt; j++)
{
int col = idx + j * bytesPerPixel;
ushort color16 = ImageMagic.ColorConvert24To16(line[i + j]);
if (usePalette)
{
linePart[col] = btn.palette.GetPaletteColor(color16);
}
else
{
linePart[col + 1] = BitConverter.GetBytes(color16)[0];
linePart[col + 0] = BitConverter.GetBytes(color16)[1];
}
}
// send the message
if (waitingForAck)
{
WaitForAck(1000);
}
if (!CheckedWrite(linePart, 0, pixelCnt + idx))
{
return(false);
}
waitingForAck = true;
}
//Console.WriteLine("c#: " + timer.ElapsedMilliseconds);
return(true);
}