dvirenderer_draw.cpp

okular

          a = ((long) (a *  current_dimconv));
          b = ((long) (b *  current_dimconv));
          if (a > 0 && b > 0) {
            int h = ((int) ROUNDUP(a, shrinkfactor * 65536));
            int w = ((int) ROUNDUP(b, shrinkfactor * 65536));
            if (colorStack.isEmpty())
              foreGroundPainter->fillRect( ((int) ((currinf.data.dvi_h) / (shrinkfactor * 65536))),
                                         currinf.data.pxl_v - h + 1, w?w:1, h?h:1, globalColor );
            else
              foreGroundPainter->fillRect( ((int) ((currinf.data.dvi_h) / (shrinkfactor * 65536))),
                                        currinf.data.pxl_v - h + 1, w?w:1, h?h:1, colorStack.top() );
          }
          break;

        case NOP:
          break;

        case BOP:
          if (is_vfmacro == false) {
            word_boundary_encountered = true;
            line_boundary_encountered = true;
          }
          command_pointer += 11 * 4;
          currinf.data.dvi_h = 1200 << 16; // Reminder: DVI-coordinates start at (1",1") from top of page
          currinf.data.dvi_v = 1200;
          currinf.data.pxl_v = int(currinf.data.dvi_v/shrinkfactor);
          currinf.data.w = currinf.data.x = currinf.data.y = currinf.data.z = 0;
          break;

        case EOP:
          // Check if we are just at the end of a virtual font macro.
          if (is_vfmacro == false) {
            // This is really the end of a page, and not just the end
            // of a macro. Mark the end of the current word.
            word_boundary_encountered = true;
            line_boundary_encountered = true;
            // Sanity check for the dvi-file: The DVI-standard asserts
            // that at the end of a page, the stack should always be
            // empty.
            if (!stack.isEmpty()) {
              kDebug(kvs::dvi) << "DRAW: The stack was not empty when the EOP command was encountered." << endl;
              errorMsg = i18n("The stack was not empty when the EOP command was encountered.");
              return;
            }
          }
          return;

        case PUSH:
          stack.push(currinf.data);
          break;

        case POP:
          if (stack.isEmpty()) {
            errorMsg = i18n("The stack was empty when a POP command was encountered.");
            return;
          } else
            currinf.data = stack.pop();
          word_boundary_encountered = true;
          line_boundary_encountered = true;
          break;

        case RIGHT1:
        case RIGHT2:
        case RIGHT3:
        case RIGHT4:
          RRtmp = readINT(ch - RIGHT1 + 1);

          // A horizontal motion in the range 4 * font space [f] < h <
          // font space [f] will be treated as a kern that is not
          // indicated in the printouts that DVItype produces between
          // brackets. We allow a larger space in the negative
          // direction than in the positive one, because TEX makes
          // comparatively large backspaces when it positions
          // accents. (comments stolen from the source of dvitype)
          if ((is_vfmacro == false) &&
              (currinf.fontp != 0) &&
              ((RRtmp >= currinf.fontp->scaled_size_in_DVI_units/6) || (RRtmp <= -4*(currinf.fontp->scaled_size_in_DVI_units/6))) &&
              (currentlyDrawnPage->textBoxList.size() > 0))
            currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += ' ';
          currinf.data.dvi_h += ((long) (RRtmp *  current_dimconv));
          break;

        case W1:
        case W2:
        case W3:
        case W4:
          WWtmp = readINT(ch - W0);
          currinf.data.w = ((long) (WWtmp *  current_dimconv));
        case W0:
          if ((is_vfmacro == false) &&
              (currinf.fontp != 0) &&
              ((WWtmp >= currinf.fontp->scaled_size_in_DVI_units/6) || (WWtmp <= -4*(currinf.fontp->scaled_size_in_DVI_units/6))) &&
              (currentlyDrawnPage->textBoxList.size() > 0) )
            currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += ' ';
          currinf.data.dvi_h += currinf.data.w;
          break;

        case X1:
        case X2:
        case X3:
        case X4:
          XXtmp = readINT(ch - X0);
          currinf.data.x = ((long) (XXtmp *  current_dimconv));
        case X0:
          if ((is_vfmacro == false)  &&
              (currinf.fontp != 0) &&
              ((XXtmp >= currinf.fontp->scaled_size_in_DVI_units/6) || (XXtmp <= -4*(currinf.fontp->scaled_size_in_DVI_units/6))) &&
              (currentlyDrawnPage->textBoxList.size() > 0))
            currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += ' ';
          currinf.data.dvi_h += currinf.data.x;
          break;

        case DOWN1:
        case DOWN2:
        case DOWN3:
        case DOWN4:
          {
            qint32 DDtmp = readINT(ch - DOWN1 + 1);
            if ((is_vfmacro == false) &&
                (currinf.fontp != 0) &&
                (abs(DDtmp) >= 5*(currinf.fontp->scaled_size_in_DVI_units/6)) &&
                (currentlyDrawnPage->textBoxList.size() > 0)) {
              word_boundary_encountered = true;
              line_boundary_encountered = true;
              if (abs(DDtmp) >= 10*(currinf.fontp->scaled_size_in_DVI_units/6))
                currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += '\n';
            }
            currinf.data.dvi_v += ((long) (DDtmp *  current_dimconv))/65536;
            currinf.data.pxl_v  = int(currinf.data.dvi_v/shrinkfactor);
          }
          break;

        case Y1:
        case Y2:
        case Y3:
        case Y4:
          YYtmp = readINT(ch - Y0);
          currinf.data.y    = ((long) (YYtmp *  current_dimconv));
        case Y0:
          if ((is_vfmacro == false) &&
              (currinf.fontp != 0) &&
              (abs(YYtmp) >= 5*(currinf.fontp->scaled_size_in_DVI_units/6)) &&
              (currentlyDrawnPage->textBoxList.size() > 0)) {
            word_boundary_encountered = true;
            line_boundary_encountered = true;
            if (abs(YYtmp) >= 10*(currinf.fontp->scaled_size_in_DVI_units/6))
              currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += '\n';
          }
          currinf.data.dvi_v += currinf.data.y/65536;
          currinf.data.pxl_v = int(currinf.data.dvi_v/shrinkfactor);
          break;

        case Z1:
        case Z2:
        case Z3:
        case Z4:
          ZZtmp = readINT(ch - Z0);
          currinf.data.z    = ((long) (ZZtmp *  current_dimconv));
        case Z0:
          if ((is_vfmacro == false) &&
              (currinf.fontp != 0) &&
              (abs(ZZtmp) >= 5*(currinf.fontp->scaled_size_in_DVI_units/6)) &&
              (currentlyDrawnPage->textBoxList.size() > 0)) {
            word_boundary_encountered = true;
            line_boundary_encountered = true;
            if (abs(ZZtmp) >= 10*(currinf.fontp->scaled_size_in_DVI_units/6))
              currentlyDrawnPage->textBoxList[currentlyDrawnPage->textBoxList.size()-1].text += '\n';
          }
          currinf.data.dvi_v += currinf.data.z/65536;
          currinf.data.pxl_v  = int(currinf.data.dvi_v/shrinkfactor);
          break;

        case FNT1:
        case FNT2:
        case FNT3:
          currinf.fontp = currinf.fonttable->find(readUINT(ch - FNT1 + 1));
          if (currinf.fontp == NULL) {
            errorMsg = i18n("The DVI code referred to a font which was not previously defined.");
            return;
          }
          currinf.set_char_p = currinf.fontp->set_char_p;
          break;

        case FNT4:
          currinf.fontp = currinf.fonttable->find(readINT(ch - FNT1 + 1));
          if (currinf.fontp == NULL) {
            errorMsg = i18n("The DVI code referred to a font which was not previously defined.");
            return;
          }
          currinf.set_char_p = currinf.fontp->set_char_p;
          break;

        case XXX1:
        case XXX2:
        case XXX3:
        case XXX4:
          if (is_vfmacro == false) {
            word_boundary_encountered = true;
            line_boundary_encountered = true;
          }
          a = readUINT(ch - XXX1 + 1);
          if (a > 0) {
            char        *cmd        = new char[a+1];
            strncpy(cmd, (char *)command_pointer, a);
            command_pointer += a;
            cmd[a] = '\0';
            applicationDoSpecial(cmd);
            delete [] cmd;
          }
          break;

        case FNTDEF1:
        case FNTDEF2:
        case FNTDEF3:
        case FNTDEF4:
          command_pointer += 12 + ch - FNTDEF1 + 1;
          {
            quint8 tempa = readUINT8();
            quint8 tempb = readUINT8();
            command_pointer += tempa + tempb;
          }
          break;

        case PRE:
        case POST:
        case POSTPOST:
          errorMsg = i18n("An illegal command was encountered.");
          return;
          break;

        default:
          errorMsg = i18n("The unknown op-code %1 was encountered.", ch);
          return;
        } /* end switch*/
      } /* end else (ch not a SETCHAR or FNTNUM) */
  } /* end for */
}


void dviRenderer::draw_page()
{
  // Reset a couple of variables
  HTML_href         = 0;
  source_href       = 0;
  penWidth_in_mInch = 0.0;

  // Calling resize() here rather than clear() means that the memory
  // taken up by the vector is not freed. This is faster than
  // constantly allocating/freeing memory.
  currentlyDrawnPage->textBoxList.resize(0);

  RenderedDviPagePixmap* currentDVIPage = dynamic_cast<RenderedDviPagePixmap*>(currentlyDrawnPage);
  if (currentDVIPage)
  {
    currentDVIPage->sourceHyperLinkList.resize(0);
  }

#ifdef PERFORMANCE_MEASUREMENT
  // If this is the first time a page is drawn, take the time that is
  // elapsed till the kdvi_multipage was constructed, and print
  // it. Set the flag so that is message will not be printed again.
  if (performanceFlag == 0) {
    kDebug(kvs::dvi) << "Time elapsed till the first page is drawn: " << performanceTimer.restart() << "ms" << endl;
    performanceFlag = 1;
  }
#endif


#ifdef DEBUG_RENDER
  kDebug(kvs::dvi) <<"draw_page" << endl;
#endif

#if 0
  if (!accessibilityBackground)
  {
#endif
    foreGroundPainter->fillRect( foreGroundPainter->viewport(), PS_interface->getBackgroundColor(current_page) );
#if 0
  }
  else
  {
    // In accessiblity mode use the custom background color
    foreGroundPainter->fillRect( foreGroundPainter->viewport(), accessibilityBackgroundColor );
  }
#endif

  // Render the PostScript background, if there is one.
  if (_postscript)
  {
#if 0
    // In accessiblity mode use the custom background color
    if (accessibilityBackground)
    {
      // Flag permanent is set to false because otherwise we would not be able to restore
      // the original background color.
      PS_interface->setBackgroundColor(current_page, accessibilityBackgroundColor, false);
    }
    else
#endif
      PS_interface->restoreBackgroundColor(current_page);

    PS_interface->graphics(current_page, resolutionInDPI, dviFile->getMagnification(), foreGroundPainter);
  }

  // Now really write the text
  if (dviFile->page_offset.isEmpty() == true)
    return;
  if (current_page < dviFile->total_pages) {
    command_pointer = dviFile->dvi_Data() + dviFile->page_offset[int(current_page)];
    end_pointer     = dviFile->dvi_Data() + dviFile->page_offset[int(current_page+1)];
  } else
    command_pointer = end_pointer = 0;

  memset((char *) &currinf.data, 0, sizeof(currinf.data));
  currinf.fonttable      = &(dviFile->tn_table);
  currinf._virtual       = 0;

  double fontPixelPerDVIunit = dviFile->getCmPerDVIunit() * 1200.0/2.54;

  draw_part(65536.0*fontPixelPerDVIunit, false);
  if (HTML_href != 0) {
    delete HTML_href;
    HTML_href = 0;
  }
  if (source_href != 0) {
    delete source_href;
    source_href = 0;
  }
}