public Bitmap Read(byte[] data)
{
int width;
int height;
byte[] pixelData;
width = WordHelpers.GetInt16Le(data, 0);
height = WordHelpers.GetInt16Le(data, 2);
pixelData = new byte[width * height];
// doom images seem to use index
// 255 for transparency, so we'll
// set the image data to transparent
// by default for the entire image
for (int i = 0; i < pixelData.Length; i++)
{
pixelData[i] = 255;
}
// each column is represented by one or
// more sub columns, called "posts" in the
// DOOM FAQ. Each post has a starting row,
// and a height, followed by a seemly unused
// value, the pixel data and then another
// unused value
for (int column = 0; column < width; column++)
{
int pointer;
pointer = WordHelpers.GetInt32Le(data, (column * 4) + 8);
do
{
int row;
int postHeight;
row = data[pointer];
if (row != 255 && (postHeight = data[++pointer]) != 255)
{
pointer++; // unused value
for (int i = 0; i < postHeight; i++)
{
if (row + i < height && pointer < data.Length - 1)
{
pixelData[((row + i) * width) + column] = data[++pointer];
}
}
pointer++; // unused value
}
else
{
break;
}
} while (pointer < data.Length - 1 && data[++pointer] != 255);
}
return(this.CreateIndexedBitmap(width, height, pixelData));
}
public void AddRanges(HexViewer control, byte[] buffer)
{
control.Clear();
if (buffer.Length > 8)
{
int[] pointer;
short width;
short height;
width = WordHelpers.GetInt16Le(buffer, 0);
height = WordHelpers.GetInt16Le(buffer, 2);
// do some basic sanity checking
if (width > 0 && width <= 320 && height > 0 && height <= 200)
{
control.AddRange(0, 2, Color.MediumSeaGreen, Color.White, "Width"); // width
control.AddRange(2, 2, Color.SeaGreen, Color.White, "Height"); // height
control.AddRange(4, 2, Color.DeepPink, Color.White, "X-Offset"); // x offset
control.AddRange(6, 2, Color.HotPink, Color.White, "Y-Offset"); // y offset
pointer = new int[width];
for (int i = 0; i < width; i++)
{
int index;
index = 8 + (i * 4);
pointer[i] = WordHelpers.GetInt32Le(buffer, index);
control.AddRange(new HexViewer.ByteGroup
{
Start = index,
Length = 4,
ForeColor = Color.White,
BackColor = Color.Orange,
Pointer = pointer[i],
Type = "Pointer #" + i.ToString()
}); // column pointer
}
for (int i = 0; i < width; i++)
{
int index;
byte length;
int sourceIndex;
index = pointer[i];
length = buffer[index + 1];
sourceIndex = 8 + (i * 4);
// post
if (_showPrimaryPosts)
{
this.AddPost(control, index, length, sourceIndex, true);
}
if (length != 255)
{
index = this.IncrementColumn(buffer, index + 3, length);
//index += length + 4; // row, length, 2xunused, pixel data
if (buffer[index] == 255)
{
this.AddColumnEndMarker(control, index, pointer[i]);
}
else
{
while (true)
{
length = buffer[index + 1];
if (length == 255 || index + length + 4 > buffer.Length)
{
break;
}
else if (_showSecondaryPosts)
{
this.AddPost(control, index, length, sourceIndex, false);
}
index = this.IncrementColumn(buffer, index + 3, length);
// index += length + 4;
if (buffer[index] == 255)
{
this.AddColumnEndMarker(control, index, pointer[i]);
break;
}
}
}
}
}
}
}
control.Invalidate();
}