public Bitmap CreateBitmap()
{
UrfPage page = pages[currentPage - 1];
Bitmap bitmap = new Bitmap(page.Header.Width, page.Header.Height, PixelFormat.Format24bppRgb);
bitmap.SetResolution(page.Header.Resolution, page.Header.Resolution);
int bytesPerPixel = page.Header.BitsPerPixel / 8;
BinaryReader reader = new BinaryReader(this.fileStream);
reader.BaseStream.Seek(page.StreamStart, SeekOrigin.Begin);
int lineCount = 0;
while (lineCount < page.Header.Height && reader.BaseStream.Position < reader.BaseStream.Length)
{
int lineRepeat = reader.ReadByte() + 1;
int linePixelsCount = 0;
Color[] linePixels = new Color[page.Header.Width];
while (linePixelsCount < page.Header.Width)
{
int pixelRepeat = reader.ReadByte();
Color pixel = Color.White;
if (pixelRepeat == 128)
{
// the rest of the line should be white
pixelRepeat = page.Header.Width - linePixelsCount;
}
else if (pixelRepeat > 128)
{
// number of non repeating pixels
int nonRepeatingPixels = 257 - pixelRepeat;
pixelRepeat = 0;
for (int i = 0; i < nonRepeatingPixels; i++)
{
linePixels[linePixelsCount++] = ReadPixel(reader, page.Header, bytesPerPixel);
}
}
else
{
// read one pixel and repeat that
pixel = ReadPixel(reader, page.Header, bytesPerPixel);
// Increasing the pixel repeat counter by one since the repeat counter is -1
pixelRepeat++;
}
// repeating pixels in a line
for (int i = 0; i < pixelRepeat; i++)
{
linePixels[linePixelsCount++] = pixel;
}
}
if (linePixelsCount > page.Header.Width)
{
throw new Exception("Error Parsing document, line is bigger than expected.");
}
// write line to the raster output, repeating lines
for (int y = 0; y < lineRepeat; y++)
{
for (int x = 0; x < linePixels.Length; x++)
{
bitmap.SetPixel(x, lineCount, linePixels[x]);
}
lineCount++;
}
}
return(bitmap);
}
public UrfDocument(string filePath)
{
this.fileStream = File.OpenRead(filePath);
this.currentPage = 1;
BinaryReader reader = new BinaryReader(this.fileStream);
byte[] header = new byte[8];
header = reader.ReadBytes(header.Length);
if (!URF_HEADER.SequenceEqual(header))
{
throw new ArgumentException(string.Format("Cannot render {0}: it is not a supported format", filePath));
}
int pageCount = reader.ReadInt();
this.pages = new List <UrfPage>(pageCount);
while (reader.BaseStream.Position < reader.BaseStream.Length)
{
UrfPage currentPage = new UrfPage();
currentPage.Header = new UrfHeader(reader);
currentPage.StreamStart = reader.BaseStream.Position;
int bytesPerPixel = currentPage.Header.BitsPerPixel / 8;
int lineCount = 0;
while (lineCount < currentPage.Header.Height && reader.BaseStream.Position < reader.BaseStream.Length)
{
int lineRepeat = reader.ReadByte() + 1;
int linePixelsCount = 0;
while (linePixelsCount < currentPage.Header.Width)
{
int pixelRepeat = reader.ReadByte();
if (pixelRepeat == 128)
{
// rest of the line should be white
pixelRepeat = currentPage.Header.Width - linePixelsCount;
}
else if (pixelRepeat > 128)
{
// number of non repeating pixels
int nonRepeatingPixels = 257 - pixelRepeat;
pixelRepeat = 0;
for (int i = 0; i < nonRepeatingPixels; i++)
{
reader.BaseStream.Seek(bytesPerPixel, SeekOrigin.Current);
linePixelsCount++;
}
}
else
{
// read one pixel and repeat that
reader.BaseStream.Seek(bytesPerPixel, SeekOrigin.Current);
// increasing the pixel repeat counter by one since the repeat counter is -1
pixelRepeat++;
}
// repeating pixels in a line
linePixelsCount += pixelRepeat;
}
if (linePixelsCount > currentPage.Header.Width)
{
throw new Exception("Error Parsing document, line is bigger than expected");
}
lineCount += lineRepeat;
}
currentPage.StreamEnd = reader.BaseStream.Position;
this.pages.Add(currentPage);
for (int i = 1; i < currentPage.Header.Copies; i++)
{
this.pages.Add(currentPage);
}
}
}
