private JB2Image ReadCompressedImage()
{
using (DjvuReader reader = Reader.CloneReader(_dataLocation, Length))
{
JB2Image image = new JB2Image();
JB2.JB2Dictionary includedDictionary = null;
if (Parent is FormChunk)
{
InclChunk[] includes = ((FormChunk)Parent).IncludedItems;
if (includes != null && includes.Count() > 0)
{
string includeID = includes.FirstOrDefault().IncludeID;
var includeItem = Document.GetChunkByID <DjbzChunk>(includeID);
if (includeItem != null)
{
includedDictionary = includeItem.ShapeDictionary;
}
}
}
image.Decode(reader, includedDictionary);
return(image);
}
}
internal bool IsLegalCompound()
{
int width = Width;
int height = Height;
if (width <= 0 || height <= 0)
return false;
JB2Image fgJb2 = ForegroundJB2Image;
if (fgJb2 == null || fgJb2.Width != width || fgJb2.Height != height)
return false;
// There is no need to synchronize since we won't access data which could be updated.
IInterWavePixelMap bgIWPixmap = (IInterWavePixelMap)BackgroundIWPixelMap;
int bgred = 0;
if (bgIWPixmap != null)
bgred = ComputeRed(width, height, bgIWPixmap.Width, bgIWPixmap.Height);
if ((bgred < 1) || (bgred > 12))
return false;
int fgred = 0;
if (ForegroundIWPixelMap != null)
{
GPixmap fgPixmap = ForegroundPixelMap;
fgred = ComputeRed(width, height, fgPixmap.Width, fgPixmap.Height);
}
return ((fgred >= 1) && (fgred <= 12));
}
public GBitmap GetBitmapList(GRect rect, int subsample, int align, List <int> components)
{
if (rect.Empty)
{
return(new Graphics.Bitmap());
}
if (Info != null)
{
int width = Info.Width;
int height = Info.Height;
JB2Image fgJb2 = ForegroundJB2Image;
if (
(width != 0) &&
(height != 0) &&
(fgJb2 != null) &&
(fgJb2.Width == width) &&
(fgJb2.Height == height))
{
return(fgJb2.GetBitmap(rect, subsample, align, 0, components));
}
}
return(null);
}
private bool IsLegalBilevel()
{
if (Info == null)
{
return(false);
}
int width = Info.Width;
int height = Info.Height;
if ((width <= 0) || (height <= 0))
{
return(false);
}
JB2Image fgJb2 = ForegroundJB2Image;
if ((fgJb2 == null) || (fgJb2.Width != width) || (fgJb2.Height != height))
{
return(false);
}
return(!(BackgroundIWPixelMap != null || ForegroundIWPixelMap != null ||
ForegroundPalette != null));
}
internal DjvuNet.Graphics.Map GetForegroundMap()
{
lock (LoadingLock)
{
DjvuNet.Graphics.Map result = null;
JB2Image jb2image = null;
IInterWavePixelMap iwPixelMap = _Page.ForegroundIWPixelMap;
if (iwPixelMap != null)
{
result = _Page.ForegroundIWPixelMap.GetPixelMap();
}
else if ((jb2image = _Page.ForegroundJB2Image) != null)
{
if (_Page.ForegroundPalette == null)
{
result = jb2image.GetBitmap(1, GBitmap.BorderSize);
}
else
{
result = jb2image.GetPixelMap(_Page.ForegroundPalette, 1, 16);
}
}
else if (iwPixelMap == null && jb2image == null)
{
result = new GBitmap(_Page.Height, _Page.Width, GBitmap.BorderSize);
}
return(result);
}
}
/// <summary>
/// Gets the foreground image for the page
/// </summary>
/// <param name="resizeToPage"></param>
/// <returns></returns>
internal System.Drawing.Bitmap GetForegroundImage(int subsample, bool resizeImage = false)
{
Verify.SubsampleRange(subsample);
lock (LoadingLock)
{
Bitmap result = null;
JB2Image jb2image = null;
IInterWavePixelMap iwPixelMap = _Page.ForegroundIWPixelMap;
if (iwPixelMap != null)
{
result = _Page.ForegroundIWPixelMap.GetPixelMap().ToImage();
}
else if ((jb2image = _Page.ForegroundJB2Image) != null)
{
if (_Page.ForegroundPalette == null)
{
result = jb2image.GetBitmap(1, GBitmap.BorderSize).ToImage();
}
else
{
result = jb2image.GetPixelMap(_Page.ForegroundPalette, 1, 16).ToImage();
}
}
else if (iwPixelMap == null && jb2image == null)
{
result = CreateBlankImage(Brushes.Black, _Page.Width / subsample, _Page.Height / subsample);
}
return(resizeImage ? ResizeImage(result, _Page.Width / subsample, _Page.Height / subsample) : result);
}
}
/// <summary>
/// Gets the foreground image for the page.
/// </summary>
/// <param name="resizeToPage"></param>
/// <returns></returns>
public static Bitmap GetForegroundImage(this DjvuImage image, int subsample, bool resizeImage = false)
{
Verify.SubsampleRange(subsample);
lock (image.LoadingLock)
{
Bitmap result = null;
JB2Image jb2image = null;
IInterWavePixelMap iwPixelMap = image.Page.ForegroundIWPixelMap;
if (iwPixelMap != null)
{
result = image.Page.ForegroundIWPixelMap.GetPixelMap().ToImage();
}
else if ((jb2image = image.Page.ForegroundJB2Image) != null)
{
if (image.Page.ForegroundPalette == null)
{
result = jb2image.GetBitmap(1, GBitmap.BorderSize).ToImage();
}
else
{
result = jb2image.GetPixelMap(image.Page.ForegroundPalette, 1, 16).ToImage();
}
}
else if (iwPixelMap == null && jb2image == null)
{
result = CreateBlankImage(Brushes.Black, image.Page.Width / subsample, image.Page.Height / subsample);
}
return(resizeImage ? ResizeImage(result, image.Page.Width / subsample, image.Page.Height / subsample) : result);
}
}
/// <summary>
/// Gets the foreground image for the page
/// </summary>
/// <param name="resizeToPage"></param>
/// <returns></returns>
internal System.Drawing.Bitmap GetForegroundImage(int subsample, bool resizeImage = false)
{
Verify.SubsampleRange(subsample);
lock (_LoadingLock)
{
Bitmap result = null;
JB2Image jb2image = null;
var iwPixelMap = _Page.ForegroundIWPixelMap;
if (iwPixelMap != null)
{
result = _Page.ForegroundIWPixelMap.GetPixelMap().ToImage();
}
else if ((jb2image = _Page.ForegroundJB2Image) != null)
{
result = jb2image.GetBitmap().ToImage();
}
else if (iwPixelMap == null && jb2image == null)
{
result = DjvuImage.CreateBlankImage(Brushes.Black, _Page.Width / subsample, _Page.Height / subsample);
}
return(resizeImage == true?DjvuImage.ResizeImage(result, _Page.Width / subsample, _Page.Height / subsample) : result);
}
}
/// <summary>
/// Reads the image which is used to remove the watermark
/// </summary>
/// <returns></returns>
private JB2Image ReadCompressedWatermarkImage()
{
using (DjvuReader reader = Reader.CloneReader(_dataLocation, Length))
{
JB2Image image = new JB2Image();
image.Decode(reader);
return(image);
}
}
/// <summary>
/// Reads the image which is used to remove the watermark
/// </summary>
/// <returns></returns>
internal JB2Image ReadCompressedWatermarkImage()
{
using (IDjvuReader reader = Reader.CloneReaderToMemory(DataOffset, Length))
{
JB2Image image = new JB2Image();
image.Decode(reader);
return(image);
}
}
private bool IsLegalCompound()
{
if (Info == null)
{
return(false);
}
int width = Info.Width;
int height = Info.Height;
if ((width <= 0) || (height <= 0))
{
return(false);
}
JB2Image fgJb2 = ForegroundJB2Image;
if ((fgJb2 == null) || (fgJb2.Width != width) || (fgJb2.Height != height))
{
return(false);
}
// There is no need to synchronize since we won't access data which could be updated.
IWPixelMap bgIWPixmap = (IWPixelMap)BackgroundIWPixelMap;
int bgred = 0;
if (bgIWPixmap != null)
{
bgred =
ComputeRed(
width,
height,
bgIWPixmap.Width,
bgIWPixmap.Height);
}
if ((bgred < 1) || (bgred > 12))
{
return(false);
}
int fgred = 0;
if (ForegroundIWPixelMap != null)
{
GPixmap fgPixmap = ForegroundPixelMap;
fgred = ComputeRed(
width,
height,
fgPixmap.ImageWidth,
fgPixmap.ImageHeight);
}
return((fgred >= 1) && (fgred <= 12));
}
internal bool IsLegalBilevel()
{
int width = Width;
int height = Height;
if (width <= 0 || height <= 0)
return false;
JB2Image fgJb2 = ForegroundJB2Image;
if (fgJb2 == null || fgJb2.Width != width || fgJb2.Height != height)
return false;
return !(BackgroundIWPixelMap != null || ForegroundIWPixelMap != null
|| ForegroundPalette != null);
}
public GBitmap GetBitmapList(GRect rect, int subsample, int align, List<int> components)
{
Verify.SubsampleRange(subsample);
if (rect.Empty)
return new Graphics.Bitmap();
int width = Width;
int height = Height;
JB2Image fgJb2 = ForegroundJB2Image;
if (width != 0 && height != 0 && fgJb2 != null && fgJb2.Width == width && fgJb2.Height == height)
return fgJb2.GetBitmap(rect, subsample, align, 0, components);
return null;
}
internal JB2Image ReadCompressedImage()
{
using (IDjvuReader reader = Reader.CloneReaderToMemory(DataOffset, Length))
{
JB2Image image = new JB2Image();
JB2.JB2Dictionary includedDictionary = null;
if (Parent is DjvuChunk djvuChunk)
{
IReadOnlyList <InclChunk> includes = djvuChunk.IncludedItems;
if (includes?.Count > 0)
{
var includeIDs = includes
.Where <InclChunk>(x => x.ChunkType == ChunkType.Incl);
var root = Document.RootForm as DjvmChunk;
DjbzChunk djbzItem = null;
foreach (InclChunk iChunk in includeIDs)
{
DirmComponent component = root?.Dirm.Components
.Where <DirmComponent>(x => x.ID == iChunk.IncludeID).FirstOrDefault();
var includeForm = root.Includes
.FirstOrDefault <IDjviChunk>(x => x.DataOffset == (component.Offset + 12));
djbzItem = includeForm?.Children
.FirstOrDefault(x => x.ChunkType == ChunkType.Djbz) as DjbzChunk;
if (djbzItem != null)
{
break;
}
}
includedDictionary = djbzItem?.ShapeDictionary;
}
}
image.Decode(reader, includedDictionary);
return(image);
}
}
internal JB2Image ReadCompressedImage()
{
using (IDjvuReader reader = Reader.CloneReaderToMemory(DataOffset, Length))
{
JB2Image image = new JB2Image();
JB2.JB2Dictionary includedDictionary = null;
DjvuChunk djvuChunk = Parent as DjvuChunk;
if (djvuChunk != null)
{
var includes = djvuChunk.IncludedItems;
if (includes?.Count > 0)
{
string includeID = includes
.FirstOrDefault <InclChunk>(x => x.ChunkType == ChunkType.Incl)?.IncludeID;
DjvmChunk root = Document.RootForm as DjvmChunk;
DirmComponent component = root?.Dirm.Components
.Where <DirmComponent>(x => x.ID == includeID).FirstOrDefault();
var includeForm =
root.Includes
.Where(x => x.DataOffset == (component.Offset + 12))
.FirstOrDefault <IDjviChunk>();
var djbzItem = includeForm?.Children
.Where <IDjvuNode>(x => x.ChunkType == ChunkType.Djbz).FirstOrDefault() as DjbzChunk;
includedDictionary = djbzItem?.ShapeDictionary;
}
}
image.Decode(reader, includedDictionary);
return(image);
}
}
internal bool Stencil(IPixelMap pm, Graphics.Rectangle rect, int subsample, double gamma)
{
Verify.SubsampleRange(subsample);
int width = Width;
int height = Height;
if (width <= 0 || height <= 0)
return false;
double gammaCorr = 1.0D;
if (gamma > 0.0D)
{
gammaCorr = gamma / Gamma;
}
if (gammaCorr < 0.10000000000000001D)
{
gammaCorr = 0.10000000000000001D;
}
else if (gammaCorr > 10D)
{
gammaCorr = 10D;
}
JB2Image fgJb2 = ForegroundJB2Image;
if (fgJb2 != null)
{
ColorPalette fgPalette = ForegroundPalette;
if (fgPalette != null)
{
List<int> components = new List<int>();
GBitmap bm = GetBitmapList(rect, subsample, 1, components);
if (fgJb2.Blits.Count != fgPalette.BlitColors?.Length)
{
pm.Attenuate(bm, 0, 0);
return false;
}
GPixmap colors =
new PixelMap().Init(1, fgPalette.PaletteColors.Length, null);
GPixelReference color = colors.CreateGPixelReference(0);
for (int i = 0; i < colors.Width; color.IncOffset())
fgPalette.IndexToColor(i++, color);
colors.ApplyGammaCorrection(gammaCorr);
List<int> compset = new List<int>();
while (components.Count > 0)
{
int lastx = 0;
int colorindex = fgPalette.BlitColors[components[0]];
GRect comprect = new GRect();
compset = new List<int>();
for (int pos = 0; pos < components.Count; )
{
int blitno = ((int)components[pos]);
JB2Blit pblit = fgJb2.Blits[blitno];
if (pblit.Left < lastx)
{
break;
}
lastx = pblit.Left;
if (fgPalette.BlitColors[blitno] == colorindex)
{
JB2Shape pshape = fgJb2.GetShape(pblit.ShapeNumber);
GRect xrect = new GRect(pblit.Left, pblit.Bottom,
pshape.Bitmap.Width, pshape.Bitmap.Height);
comprect.Recthull(comprect, xrect);
compset.Add(components[pos]);
components.RemoveAt(pos);
}
else
{
pos++;
}
}
comprect.XMin /= subsample;
comprect.YMin /= subsample;
comprect.XMax = ((comprect.XMax + subsample) - 1) / subsample;
comprect.YMax = ((comprect.YMax + subsample) - 1) / subsample;
comprect.Intersect(comprect, rect);
if (comprect.Empty)
{
continue;
}
bm = new DjvuNet.Graphics.Bitmap();
bm.Init(comprect.Height, comprect.Width, 0);
bm.Grays = 1 + (subsample * subsample);
int rxmin = comprect.XMin * subsample;
int rymin = comprect.YMin * subsample;
for (int pos = 0; pos < compset.Count; ++pos)
{
int blitno = ((int)compset[pos]);
JB2Blit pblit = fgJb2.Blits[blitno];
JB2Shape pshape = fgJb2.GetShape(pblit.ShapeNumber);
bm.Blit(
pshape.Bitmap,
pblit.Left - rxmin,
pblit.Bottom - rymin,
subsample);
}
color.SetOffset(colorindex);
pm.Blit(
bm,
comprect.XMin - rect.XMin,
comprect.YMin - rect.YMin,
color);
}
return true;
}
// Three layer model.
IInterWavePixelMap fgIWPixmap = ForegroundIWPixelMap;
if (fgIWPixmap != null)
{
GBitmap bm = GetBitmap(rect, subsample, 1, null);
if (bm != null && pm != null)
{
GPixmap fgPixmap = ForegroundPixelMap;
int w = fgPixmap.Width;
int h = fgPixmap.Height;
int red = ComputeRed(width, height, w, h);
// if((red < 1) || (red > 12))
if (red < 1 || red > 16)
return false;
//
// int supersample = (red <= subsample)
// ? 1
// : (red / subsample);
// int wantedred = supersample * subsample;
//
// if(red == wantedred)
// {
// pm.stencil(bm, fgPixmap, supersample, rect, gamma_correction);
//
// return 1;
// }
pm.Stencil(bm, fgPixmap, red, subsample, rect, gammaCorr);
return true;
}
}
}
return false;
}
