public override void Initialize()
{
base.Initialize();
PImage original = new PImage(Resources.__2);
original.X = 0;
original.Y = 0;
Canvas.Layer.AddChild(original);
PText origLabel = new PText("Original, Size: " + Resources._2.Length);
origLabel.ConstrainWidthToTextWidth = false;
origLabel.SetBounds(0, Resources.__2.Height, Resources.__2.Width, 50);
origLabel.TextAlignment = StringAlignment.Center;
Canvas.Layer.AddChild(origLabel);
AreaSample area = new AreaSample(Resources.__2);
PImage areaSampled = new PImage(area.toBitmap());
areaSampled.X = original.Width;
areaSampled.Y = 0;
Canvas.Layer.AddChild(areaSampled);
PText comLabel = new PText("Area sampled, Size: " + area.size + ", Ratio: " + ((float)area.size / Resources._2.Length));
comLabel.ConstrainWidthToTextWidth = false;
comLabel.SetBounds(origLabel.Bounds.Right, origLabel.Y, areaSampled.Width, 50);
comLabel.TextAlignment = StringAlignment.Center;
Canvas.Layer.AddChild(comLabel);
AreaDownSample ad = new AreaDownSample(Resources.__2);
PImage adown = new PImage(ad.toBitmap());
adown.X = areaSampled.Bounds.Right;
adown.Y = 0;
Canvas.Layer.AddChild(adown);
PText adLabel = new PText("Area down sampled, Size: " + ad.size + ", Ratio: " + ((float)ad.size / Resources._2.Length));
adLabel.ConstrainWidthToTextWidth = false;
adLabel.SetBounds(comLabel.Bounds.Right, origLabel.Y, areaSampled.Width, 50);
adLabel.TextAlignment = StringAlignment.Center;
Canvas.Layer.AddChild(adLabel);
RunLengthEncode run = new RunLengthEncode(Resources.__2);
PImage runlen = new PImage(run.toBitmap());
runlen.X = adown.Bounds.Right;
runlen.Y = 0;
Canvas.Layer.AddChild(runlen);
PText runLabel = new PText("Run length encoded, Size: " + ad.size + ", Ratio: " + ((float)run.size / Resources._2.Length));
runLabel.ConstrainWidthToTextWidth = false;
runLabel.SetBounds(adLabel.Bounds.Right, origLabel.Y, areaSampled.Width, 50);
runLabel.TextAlignment = StringAlignment.Center;
Canvas.Layer.AddChild(runLabel);
}
public RunLengthEncode(AreaDownSample input)
{
List<byte> newFile = new List<byte>();
//Add the effective dimensions as a header
newFile.AddRange(BitConverter.GetBytes(input.Width / AreaSample.area));
newFile.AddRange(BitConverter.GetBytes(input.Height / AreaSample.area));
//Initialise lists to store each channel's information
List<byte>[] channels = new List<byte>[3];
for (int i = 0; i < 3; i += 1)
{
channels[i] = new List<byte>();
}
//Consider each byte of the input image
for (int i = 4; i < input.ImageData.Length; i += 1)
{
//Split it in to the two consituent colours
byte cur = input.ImageData[i];
byte top = (byte)((cur & topBits) / toTop);
byte bottom = (byte)(cur & bottomBits);
int channel1 = (2 * (i - 4)) % 3;
int channel2 = (channel1 + 1) % 3;
//Save them to the appropriate channel
channels[channel1].Add(top);
channels[channel2].Add(bottom);
}
List<byte>[] compressedChannels = new List<byte>[3];
for (int i = 0; i < 3; i += 1)
{
compressedChannels[i] = new List<byte>();
byte last = channels[i][0];
int run = 0;
for (int j = 0; j < channels[i].Count; j++)
{
byte cur = channels[i][j];
if ((run > 0 && last != cur) || run == 15 || j == channels[i].Count - 1)
{
byte item = (byte)(run * toTop + last);
compressedChannels[i].Add(item);
run = 0;
}
run += 1;
last = cur;
}
newFile.AddRange(compressedChannels[i]);
}
ImageData = newFile.ToArray();
}
