コード例 #1
0
ファイル: JB2Image.cs プロジェクト: Riksarkivet/DjvuNet
        public Bitmap GetBitmap(int subsample, int align)
        {
            if ((Width == 0) || (Height == 0))
            {
                throw new SystemException("Image can not create bitmap");
            }

            int swidth = ((Width + subsample) - 1) / subsample;
            int sheight = ((Height + subsample) - 1) / subsample;
            int border = (((swidth + align) - 1) & ~(align - 1)) - swidth;

            Bitmap bm = new Bitmap();
            bm.Init(sheight, swidth, border);
            bm.Grays = (1 + (subsample * subsample));

            //for (int blitno = 0; blitno < Blits.Count; blitno++)
            Parallel.For(
                0,
                Blits.Count,
                blitno =>
                {
                    JB2Blit pblit = GetBlit(blitno);
                    JB2Shape pshape = GetShape(pblit.ShapeNumber);

                    if (pshape.Bitmap != null)
                    {
                        bm.Blit(pshape.Bitmap, pblit.Left, pblit.Bottom, subsample);
                    }
                });

            return bm;
        }
コード例 #2
0
ファイル: DjvuPage.cs プロジェクト: Riksarkivet/DjvuNet
        private bool Stencil(PixelMap pm, Graphics.Rectangle rect, int subsample, double gamma)
        {
            if (Info == null)
            {
                return false;
            }

            int width = Info.Width;
            int height = Info.Height;

            if ((width <= 0) || (height <= 0))
            {
                return false;
            }

            double gamma_correction = 1.0D;

            if (gamma > 0.0D)
            {
                gamma_correction = gamma / Info.Gamma;
            }

            if (gamma_correction < 0.10000000000000001D)
            {
                gamma_correction = 0.10000000000000001D;
            }
            else if (gamma_correction > 10D)
            {
                gamma_correction = 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 GPixmap().Init(
                        1,
                        fgPalette.PaletteColors.Length,
                        null);
                    GPixelReference color = colors.CreateGPixelReference(0);

                    for (int i = 0; i < colors.ImageWidth; color.IncOffset())
                    {
                        fgPalette.index_to_color(i++, color);
                    }

                    colors.ApplyGammaCorrection(gamma_correction);

                    List<int> compset = new List<int>();

                    while (components.Count > 0)
                    {
                        int lastx = 0;
                        int colorindex = fgPalette.BlitColors[((int)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.ImageWidth,
                                    pshape.Bitmap.ImageHeight);
                                comprect.Recthull(comprect, xrect);
                                compset.Add(components[pos]);
                                components.Remove(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   = getBitmap(comprect, subsample, 1);
                        bm = new GBitmap();
                        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.
                IWPixelMap fgIWPixmap = ForegroundIWPixelMap;

                if (fgIWPixmap != null)
                {
                    GBitmap bm = GetBitmap(rect, subsample, 1, null);

                    if ((bm != null) && (pm != null))
                    {
                        GPixmap fgPixmap = ForegroundPixelMap;
                        int w = fgPixmap.ImageWidth;
                        int h = fgPixmap.ImageHeight;
                        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, gamma_correction);
                        return true;
                    }
                }
            }

            return false;
        }
コード例 #3
0
ファイル: JB2Image.cs プロジェクト: Riksarkivet/DjvuNet
        public Bitmap GetBitmap(Rectangle rect, int subsample, int align, int dispy, List<int> components)
        {
            if (components == null)
            {
                return GetBitmap(rect, subsample, align, dispy);
            }

            if ((Width == 0) || (Height == 0))
            {
                throw new SystemException("Image can not create bitmap");
            }

            int rxmin = rect.Right * subsample;
            int rymin = rect.Bottom * subsample;
            int swidth = rect.Width;
            int sheight = rect.Height;
            int border = (((swidth + align) - 1) & ~(align - 1)) - swidth;
            Bitmap bm = new Bitmap();
            bm.Init(sheight, swidth, border);
            bm.Grays = (1 + (subsample * subsample));

            for (int blitno = 0; blitno < Blits.Count; )
            {
                JB2Blit pblit = GetBlit(blitno++);
                JB2Shape pshape = GetShape(pblit.ShapeNumber);

                if (pshape.Bitmap != null)
                {
                    if (bm.Blit(pshape.Bitmap, pblit.Left - rxmin, (dispy + pblit.Bottom) - rymin, subsample))
                    {
                        components.Add((blitno - 1));
                    }
                }
            }

            return bm;
        }