// setup an empty memory map, this should be called once
public void init(int filesize, FrmMain formMainHandle)
{
lstBoxLocations.Items.Add("0 \t<start of file>");
mapMarker[numNotes].set(0, 0, "<start of file>");
numNotes++;
lstBoxLocations.Items.Add(filesize.ToString()+"\t<start of file>");
mapMarker[numNotes].set(filesize, filesize, "<end of file>");
numNotes++;
updateDisplay();
gFrmMain = formMainHandle;
gFileSize = filesize;
}
public void Plot(ref byte[] fileBufferArray, int fileSize, float[] frequency, int offset, FrmEncode frmEncode, FrmMain frmMain) {
int columns = pictureBox1.Width;
int rows = pictureBox1.Height;
int position = offset;
byte currentByte;
globalFrmMain = frmMain;
globalOffset = offset;
globalFileSize = fileSize;
globalColumns = columns;
Bitmap b = new Bitmap(columns, rows, PixelFormat.Format24bppRgb);
BitmapData bmd = b.LockBits(new Rectangle(0, 0, columns, rows), ImageLockMode.ReadWrite, b.PixelFormat); //PixelFormat.Format24bppRgb
// The unsafe code block is necessary to operate directly on the image
// memory vs. setpixel. About 250-300x faster
unsafe {
for (int j = 0; j < rows; j++) {
byte* row = (byte*)bmd.Scan0 + (j * bmd.Stride);
for (int i = 0; i < columns; i++) {
currentByte = 0;
if (position < fileSize) {
currentByte = fileBufferArray[j * columns + i + offset];
position++;
//color coding
if (FrmEncode.colorMode == 0) { //normal
row[i * 3 + 1] = currentByte;
} else if (FrmEncode.colorMode == 1) {//ASCII
if ((currentByte >= 32) && (currentByte <= 127)) {
row[i * 3] = 255; //blue
} else {
row[i * 3] = 32; //gray
row[i * 3 + 1] = 32;
row[i * 3 + 2] = 32;
}
} else if (FrmEncode.colorMode == 2) {//Frequency
if (frequency[currentByte]>.375){
row[i * 3+2] = 255; //red
}
if (frequency[currentByte] <.01) {
row[i * 3] = 255; //blue
}
if ((frequency[currentByte] >= .01)&&(frequency[currentByte]<=.375))
{
row[i * 3] = 64; //gray
row[i * 3 + 1] = 64;
row[i * 3 + 2] = 64;
}
}
if (FrmEncode.invert == 1) {
row[i * 3] = (byte)(255 - row[i * 3]);
row[i * 3 + 1] = (byte)(255 - row[i * 3+1]);
row[i * 3 + 2] = (byte)(255 - row[i * 3+2]);
}
}
}
}
b.UnlockBits(bmd);
pictureBox1.Image = b;
// Invert(b);
} //unsafe
}
public FrmStrings(FrmMain frmMain)
{
InitializeComponent();
gFrmMain = frmMain;
}
//overide constructor in order to accept argument
public FrmNavigator(FrmMain callingHandle)
{
InitializeComponent();
handle = callingHandle;
}
// internal static void
public void calcFrequency(int fileLength, ref int[] byteCount, ref byte[] fileBufferArray, ref float[] frequency, FrmMain frmMainHandle)
{
FrmProgressBar fpb = new FrmProgressBar("calculating byte frequency...");
//Console.WriteLine(this.ParentForm.ToString());
fpb.MdiParent = frmMainHandle;
fpb.Start(0, fileLength);
fpb.Show();
for (int i = 0; i < fileLength; i++) {
byteCount[fileBufferArray[i]]++;
if (i % 10000 == 0)
{
fpb.Update(i);
Application.DoEvents();
}
}
for (int j = 0; j <= 255; j++) {
frequency[j] = (float)byteCount[j] / fileLength; //dividing int by int is integer division, must cast to float
//Console.WriteLine(j + " " + byteCount[j]+ " " + fileLength + " " + frequency[j]);
}
fpb.Hide();
}
//overide constructor in order to accept argument
public FrmNavigator(FrmMain callingHandle)
{
InitializeComponent();
handle = callingHandle;
}
// internal static void
public void calcFrequency(int fileLength, ref int[] byteCount, ref byte[] fileBufferArray, ref float[] frequency, FrmMain frmMainHandle)
{
FrmProgressBar fpb = new FrmProgressBar("calculating byte frequency...");
//Console.WriteLine(this.ParentForm.ToString());
fpb.MdiParent = frmMainHandle;
fpb.Start(0, fileLength);
fpb.Show();
for (int i = 0; i < fileLength; i++)
{
byteCount[fileBufferArray[i]]++;
if (i % 10000 == 0)
{
fpb.Update(i);
Application.DoEvents();
}
}
for (int j = 0; j <= 255; j++)
{
frequency[j] = (float)byteCount[j] / fileLength; //dividing int by int is integer division, must cast to float
//Console.WriteLine(j + " " + byteCount[j]+ " " + fileLength + " " + frequency[j]);
}
fpb.Hide();
}
