/// <summary>
/// Overwrite frame data
/// </summary>
/// <param name="prev">Frame data to apply</param>
public void Overwrite(PPMFrame prev) // Just use current frame
{
if ((_firstByteHeader & 0x80) != 0)
{
return;
}
// < There is NOT a mistake anywhere
int ld0 = ((_translateX >= 0) ? (_translateX >> 3) : 0);
int pi0 = (_translateX >= 0) ? 0 : ((-_translateX) >> 3);
byte del = (byte)(_translateX >= 0 ? (_translateX & 7) : (((byte)(_translateX)) & 7));
byte ndel = (byte)(8 - del);
byte alpha = (byte)((1 << (8 - del)) - 1); byte nalpha = (byte)~alpha; int pi, ld; if (_translateX >= 0)
{
for (int y = 0; y < 192; y++)
{
if (y < _translateY)
{
continue;
}
if (y - _translateY >= 192)
{
break;
}
ld = (y << 5) + ld0; pi = ((y - _translateY) << 5) + pi0; Layer1[ld] ^= (byte)(prev.Layer1[pi] & alpha); Layer2[ld++] ^= (byte)(prev.Layer2[pi] & alpha); while ((ld & 31) < 31)
{
Layer1[ld] ^= (byte)(((prev.Layer1[pi] & nalpha) >> ndel) | ((prev.Layer1[pi + 1] & alpha) << del)); Layer2[ld] ^= (byte)(((prev.Layer2[pi] & nalpha) >> ndel) | ((prev.Layer2[pi + 1] & alpha) << del)); ld++; pi++;
}
Layer1[ld] ^= (byte)((prev.Layer1[pi] & nalpha) | (prev.Layer1[pi + 1] & alpha)); Layer2[ld] ^= (byte)((prev.Layer2[pi] & nalpha) | (prev.Layer2[pi + 1] & alpha));
}
}
else
{
for (ushort y = 0; y < 192; y++)
{
if (y < _translateY)
{
continue;
}
if (y - _translateY >= 192)
{
break;
}
ld = (y << 5) + ld0; pi = ((y - _translateY) << 5) + pi0; while ((pi & 31) < 31)
{
Layer1[ld] ^= (byte)(((prev.Layer1[pi] & nalpha) >> ndel) | ((prev.Layer1[pi + 1] & alpha) << del)); Layer2[ld] ^= (byte)(((prev.Layer2[pi] & nalpha) >> ndel) | ((prev.Layer2[pi + 1] & alpha) << del)); ld++; pi++;
}
Layer1[ld] ^= (byte)(prev.Layer1[pi] & nalpha); Layer2[ld] ^= (byte)(prev.Layer2[pi] & nalpha);
}
}
}
public static Image GetFrameBitmap(PPMFrame frame)
{
var bmp = new Image <Rgba32>(256, 192);
var rect = new Rectangle(0, 0, 256, 192);
byte[] bytes = new byte[(256 * 192) + 1];
for (var y = 0; y <= 192; y++)
{
for (var x = 0; x <= 256; x++)
{
if (frame.Layer1[y, x])
{
if (frame.Layer1.PenColor != PenColor.Inverted)
{
bmp[x, y] = frame.Layer1.PenColor == PenColor.Red ? Color.Red : Color.Blue;
}
else
{
bmp[x, y] = frame.PaperColor == PaperColor.Black ? Color.Black : Color.White;
}
}
else
{
if (frame.Layer2[y, x])
{
if (frame.Layer2.PenColor != PenColor.Inverted)
{
bmp[x, y] = frame.Layer2.PenColor == PenColor.Red ? Color.Red : Color.Blue;
}
else
{
bmp[x, y] = frame.PaperColor == PaperColor.Black ? Color.Black : Color.White;
}
}
else
{
bmp[x, y] = frame.PaperColor == PaperColor.White ? Color.White : Color.Black;
}
}
}
}
return(bmp);
}
public PPMFrame CreateDiff0(PPMFrame prev)
{
var frame = new PPMFrame();
frame._firstByteHeader = _firstByteHeader;
//frame._firstByteHeader &= 0b00011111;
//frame._firstByteHeader |= 0x80;
for (int i = 0; i < 32 * 192; i++)
{
frame.Layer1[i] = (byte)(Layer1[i] ^ prev.Layer1[i]);
frame.Layer2[i] = (byte)(Layer2[i] ^ prev.Layer2[i]);
}
for (int y = 0; y < 192; y++)
{
frame.Layer1.SetLineEncoding(y, frame.Layer1.ChooseLineEncoding(y));
frame.Layer2.SetLineEncoding(y, frame.Layer1.ChooseLineEncoding(y));
}
// > TO DO : update line encodings
return(frame);
}
