public System.Drawing.Bitmap BuildPageImage(bool rebuild = false)
{
const int subsample = 1;
int width = _Page.Width / subsample;
int height = _Page.Height / subsample;
GMap map = null;
Rectangle rect = new Rectangle(0, 0, width, height);
Bitmap retVal = null;
if (rebuild || _Image == null)
{
map = _Page.GetMap(new GRect(0, 0, width, height), subsample, null);
if (map == null)
{
return(new Bitmap(width, height));
}
if (map.BytesPerPixel == 3)
{
const PixelFormat format = PixelFormat.Format24bppRgb;
retVal = DjvuImage.ImageFromMap(map, rect, format);
}
else if (map.BytesPerPixel == 1)
{
const PixelFormat format = PixelFormat.Format8bppIndexed;
retVal = DjvuImage.ImageFromMap(map, rect, format);
}
}
else
{
retVal = _Image;
}
if (map.BytesPerPixel == 3 && IsInverted)
{
retVal = DjvuImage.InvertColor(retVal);
}
else if (map.BytesPerPixel == 1)
{
System.Drawing.Imaging.ColorPalette palette = retVal.Palette;
if (!IsInverted)
{
for (int i = 0; i < 256; i++)
{
palette.Entries[i] = Color.FromArgb(i, i, i);
}
retVal.Palette = palette;
}
else
{
int j = 0;
for (int i = 0; i < 256; i++)
{
j = 255 - i;
palette.Entries[i] = Color.FromArgb(j, j, j);
}
retVal.Palette = palette;
}
}
return(retVal);
//int[] pixels = new int[width * height];
//map.FillRgbPixels(0, 0, width, height, pixels, 0, width);
//var image = ConvertDataToImage(pixels);
//if (IsInverted == true)
// image = InvertImage(image);
//return image;
}
