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//C- -*- C++ -*-
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//C- -------------------------------------------------------------------
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//C- DjVuLibre-3.5
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//C- Copyright (c) 2002-2003 Leon Bottou and Yann Le Cun.
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//C- Copyright (c) 2001 AT&T
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//C-
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//C- This software is subject to, and may be distributed under, the
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//C- GNU General Public License, Version 2. The license should have
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//C- accompanied the software or you may obtain a copy of the license
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//C- from the Free Software Foundation at http://www.fsf.org .
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//C-
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//C- This program is distributed in the hope that it will be useful,
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//C- but WITHOUT ANY WARRANTY; without even the implied warranty of
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//C- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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//C- GNU General Public License for more details.
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//C-
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//C- DjVuLibre-3.5 is derived from the DjVu(r) Reference Library
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//C- distributed by Lizardtech Software. On July 19th 2002, Lizardtech
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//C- Software authorized us to replace the original DjVu(r) Reference
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//C- Library notice by the following text (see doc/lizard2002.djvu):
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//C-
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//C- ------------------------------------------------------------------
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//C- | DjVu (r) Reference Library (v. 3.5)
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//C- | Copyright (c) 1999-2001 LizardTech, Inc. All Rights Reserved.
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//C- | The DjVu Reference Library is protected by U.S. Pat. No.
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//C- | 6,058,214 and patents pending.
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//C- |
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//C- | This software is subject to, and may be distributed under, the
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//C- | GNU General Public License, Version 2. The license should have
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//C- | accompanied the software or you may obtain a copy of the license
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//C- | from the Free Software Foundation at http://www.fsf.org .
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//C- |
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//C- | The computer code originally released by LizardTech under this
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//C- | license and unmodified by other parties is deemed "the LIZARDTECH
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//C- | ORIGINAL CODE." Subject to any third party intellectual property
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//C- | claims, LizardTech grants recipient a worldwide, royalty-free,
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//C- | non-exclusive license to make, use, sell, or otherwise dispose of
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//C- | the LIZARDTECH ORIGINAL CODE or of programs derived from the
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//C- | LIZARDTECH ORIGINAL CODE in compliance with the terms of the GNU
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//C- | General Public License. This grant only confers the right to
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//C- | infringe patent claims underlying the LIZARDTECH ORIGINAL CODE to
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//C- | the extent such infringement is reasonably necessary to enable
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//C- | recipient to make, have made, practice, sell, or otherwise dispose
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//C- | of the LIZARDTECH ORIGINAL CODE (or portions thereof) and not to
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//C- | any greater extent that may be necessary to utilize further
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//C- | modifications or combinations.
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//C- |
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//C- | The LIZARDTECH ORIGINAL CODE is provided "AS IS" WITHOUT WARRANTY
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//C- | OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
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//C- | TO ANY WARRANTY OF NON-INFRINGEMENT, OR ANY IMPLIED WARRANTY OF
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//C- | MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
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//C- +------------------------------------------------------------------
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//
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// $Id: DjVuToPS.h,v 1.14 2004/03/05 16:48:53 leonb Exp $
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// $Name: release_3_5_15 $
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#ifndef _DJVU_TO_PS_H_
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#define _DJVU_TO_PS_H_
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#if NEED_GNUG_PRAGMAS
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# pragma interface
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#endif
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/** @name DjVuToPS.h
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Files #"DjVuToPS.h"# and #"DjVuToPS.cpp"# implement code that can be
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used to convert a \Ref{DjVuImage} or \Ref{DjVuDocument} to PostScript
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format. The conversion is carried out by the \Ref{DjVuToPS} class.
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@memo PostScript file generator
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@author Andrei Erofeev <eaf@geocities.com> \\
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Florin Nicsa <Florin.Nicsa@insa-lyon.fr>
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@version
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#$Id: DjVuToPS.h,v 1.14 2004/03/05 16:48:53 leonb Exp $#
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*/
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//@{
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#include "DjVuGlobal.h"
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#include "GRect.h"
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#include "DjVuDocument.h"
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#include "DjVuText.h"
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#ifdef HAVE_NAMESPACES
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namespace DJVU {
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# ifdef NOT_DEFINED // Just to fool emacs c++ mode
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}
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#endif
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#endif
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/** DjVuImage to PostScript converter.
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Use this class to print \Ref{DjVuImage}s and \Ref{DjVuDocument}s.
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The behavior is customizable. See \Ref{DjVuToPS::Options} for the
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description of available options.*/
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class DjVuToPS
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{
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public:
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class DecodePort;
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/** DjVuToPS options. Use this class to customize the way
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in which DjVu to PS conversion will be done. You can adjust
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the following things:
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\begin{description}
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\item[Format] ({\em EPS} or {\em PS}). Use the {\em EPS}
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format if you plan to embed the output image into another
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document. Print {\em PS} otherwise.
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\item[Language level] ({\em 1} or {\em 2}). Any PostScript
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printer or interpreter should understand PostScript Level 1
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files. Unfortunately we cannot efficiently compress and encode
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data when generating Level 1 files. PostScript Level 2 allows
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to employ an RLE compression and ASCII85 encoding scheme,
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which makes output files significantly smaller. Most of
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the printers and word processors nowadays support PostScript
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Level 2.
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\item[Orientation] ({\em PORTRAIT} or {\em LANDSCAPE})
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\item[Zoom factor] ({\em FIT_PAGE} or {\em ONE_TO_ONE}).
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{\em ONE_TO_ONE} mode is useful, if you want the output to
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be of the same size as the original image (before compression).
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This requires that the #dpi# setting inside the \Ref{DjVuImage}
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is correct. In most of the cases the {\em FIT_PAGE} zoom is
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would be your best choice.
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\item[Mode] ({\em COLOR}, {\em FORE}, {\em BACK}, or {\em BW})
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Specifies how the \Ref{DjVuImage}s will be rendered (all layers,
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foreground layer, background layer, and the mask respectively)
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\item[Color] ({\em TRUE} or {\em FALSE}). Choosing {\em FALSE}
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converts color images to gray scale.
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\item[Gamma] Printer color correction.
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This parameter ranges from #0.3# to #5.0#.
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\item[sRGB] ({\em TRUE} or {\em FALSE}). Choosing {\em TRUE}
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enables accurate sRGB color calibration. This option
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only works with language level 2. When this is set,
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gamma correction is clamped to #2.2#.
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\item[Number of copies] Specifies how many copies should be
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printed. This does {\bf not} affect the size of the output file.
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\end{description}
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*/
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class Options
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{
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public:
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/** Specifies the rendering mode */
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enum Mode { COLOR, FORE, BACK, BW };
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/** Selects the output format */
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enum Format { PS, EPS };
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/** Specifies the orientation of the output image */
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enum Orientation { PORTRAIT, LANDSCAPE, AUTO };
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/** Specifies the booklet mode */
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enum BookletMode { OFF, RECTO, VERSO, RECTOVERSO };
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private:
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Format format;
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int level;
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Orientation orientation;
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Mode mode;
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int zoom;
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bool color;
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bool calibrate;
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bool text;
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double gamma;
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int copies;
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bool frame;
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bool cropmarks;
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BookletMode bookletmode;
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int bookletmax;
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int bookletalign;
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int bookletfold;
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int bookletxfold;
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public:
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/** Sets output image format to #PS# or #EPS# */
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void set_format(Format format);
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/** Sets PostScript level (#1#, #2#, or #3#) */
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void set_level(int level);
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/** Sets orientation (#LANDSCAPE# or #PORTRAIT#) */
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void set_orientation(Orientation orientation);
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/** Sets \Ref{DjVuImage} rendering mode (#COLOR#, #BW#, #FORE#, #BACK#) */
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void set_mode(Mode mode);
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/** Sets zoom factor. Zoom 0 means fit page. */
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void set_zoom(int zoom);
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/** Affects automatic conversion to GreyScale mode. */
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void set_color(bool color);
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/** Sets gamma correction factor. Ranges from #0.3# to #5.0#. */
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void set_gamma(double gamma);
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/** Sets sRGB color calibration flag. */
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void set_sRGB(bool calibrate);
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/** Specifies the number of copies to be printed. */
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void set_copies(int copies);
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/** Specifies if a gray frame around the image should be printed. */
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void set_frame(bool on);
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/** Specifies if crop marks should be printed. */
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void set_cropmarks(bool on);
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/** Specifies if a shadow text should be printed. */
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void set_text(bool on);
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/** Specifies the bookletmode */
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void set_bookletmode(BookletMode m);
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/** Specifies the maximal number of pages in a booklet */
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void set_bookletmax(int m);
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/** Specifies an offset (points) between
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booklet recto(s) and verso(s). */
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void set_bookletalign(int m);
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/** Specifies the margin (points) required to fold
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the booklet (#fold# in points) and the margin
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increase required for each sheet (#xfold# in millipoints). */
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void set_bookletfold(int fold, int xfold=0);
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/** Returns output image format (#PS# or #EPS#) */
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Format get_format(void) const {
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return format; }
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/** Returns PostScript level (#1# or #2#) */
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int get_level(void) const {
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return level; }
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/** Returns output image orientation (#PORTRAIT# or #LANDSCAPE#) */
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Orientation get_orientation(void) const {
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return orientation; }
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/** Returns \Ref{DjVuImage} rendering mode
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(#COLOR#, #FORE#, #BACK#, #BW#) */
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Mode get_mode(void) const {
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return mode; }
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/** Returns output zoom factor (#FIT_PAGE# or #ONE_TO_ONE#) */
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int get_zoom(void) const {
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return zoom; }
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/** Returns color printing flag. */
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bool get_color(void) const {
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return color; }
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/** Returns sRGB color calibration flag. */
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bool get_sRGB(void) const {
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return calibrate; }
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/** Returns printer gamma correction factor */
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double get_gamma(void) const {
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return ((calibrate) ? ((double)2.2) : gamma); }
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/** Returns the number of copies, which will be printed by printer
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This parameter does {\bf not} affect the size of output file */
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int get_copies(void) const {
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return copies; }
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/** Returns #TRUE# if there will be a gray frame */
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bool get_frame(void) const {
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return frame; }
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/** Returns #TRUE# if there will be a gray frame */
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bool get_cropmarks(void) const {
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return cropmarks; }
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/** Returns #TRUE# if there will be a shadow text printed */
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bool get_text(void) const {
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return text; }
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/** Returns the booklet mode */
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BookletMode get_bookletmode(void) const {
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return bookletmode; }
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/** Returns the booklet max size */
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int get_bookletmax(void) {
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return bookletmax; }
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/** Returns the booklet recto/verso offset */
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int get_bookletalign(void) {
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return bookletalign; }
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/** Returns the folding margin for sheet number #n#. */
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int get_bookletfold(int n=0) {
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return bookletfold + (n*bookletxfold+500)/1000; }
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/* Constructor */
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Options(void);
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};
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/** Describes current page processing stage. This is passed to
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the #info_cb()# callback. See \Ref{set_info_cb}() for details. */
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enum Stage { DECODING, PRINTING };
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private:
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void (*refresh_cb)(void*);
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void *refresh_cl_data;
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void (*prn_progress_cb)(double, void*);
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void *prn_progress_cl_data;
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void (*dec_progress_cb)(double, void*);
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void *dec_progress_cl_data;
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void (*info_cb)(int,int,int,Stage,void*);
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void *info_cl_data;
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unsigned char ramp[256];
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GP<DecodePort> port;
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protected:
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void store_doc_prolog(ByteStream&,int,int,GRect*);
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void store_doc_setup(ByteStream&);
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void store_doc_trailer(ByteStream&);
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void store_page_setup(ByteStream&,int,const GRect&,int align=0);
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void store_page_trailer(ByteStream&);
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void make_gamma_ramp(GP<DjVuImage>);
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void print_image_lev1(ByteStream&,GP<DjVuImage>,const GRect&);
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void print_image_lev2(ByteStream&,GP<DjVuImage>,const GRect&);
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void print_bg(ByteStream&,GP<DjVuImage>,const GRect&);
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void print_fg_3layer(ByteStream&,GP<DjVuImage>,const GRect&,unsigned char*);
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void print_fg_2layer(ByteStream&,GP<DjVuImage>,const GRect&,unsigned char*);
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void print_fg(ByteStream&,GP<DjVuImage>,const GRect&);
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void print_image(ByteStream&,GP<DjVuImage>,const GRect&,GP<DjVuTXT>);
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void parse_range(GP<DjVuDocument>,GUTF8String,GList<int>&);
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GP<DjVuImage> decode_page(GP<DjVuDocument>,int,int,int);
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void process_single_page(ByteStream&,GP<DjVuDocument>,int,int,int,int);
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void process_double_page(ByteStream&,GP<DjVuDocument>,void*,int,int);
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public:
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/** Options affecting the print result. Please refer to
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\Ref{DjVuToPS::Options} for details. */
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Options options;
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/** @name Callbacks */
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//@{
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/** Refresh callback is a function, which will be called fairly
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often while the image (document) is being printed. It can
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be used to refresh a GUI, if necessary.
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@param refresh_cb Callback function to be called periodically
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@param refresh_cl_data Pointer passed to #refresh_cb()# */
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void set_refresh_cb(void (*refresh_cb)(void*), void *refresh_cl_data);
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/** Callback used to report the progress of printing. The progress is a
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double number from 0 to 1. If an existing \Ref{DjVuImage} is printed,
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this callback will be called at least twice: in the beginning and at the
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end of printing. If a \Ref{DjVuDocument} is being printed, this
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callback will be used to report printing progress of every page. To
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learn the number of the page being printed you can use
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\Ref{set_info_cb}() function. See \Ref{set_dec_progress_cb}() to find
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out how to learn the decoding progress.
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@param cb Callback function to be called
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@param data Pointer passed to #cb()#. */
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void set_prn_progress_cb(void (*cb)(double, void*), void *data);
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/** Callback used to report the progress of decoding. The progress is a
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double number from 0 to 1. This callback is only used when printing a
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\Ref{DjVuDocument} in a multithreaded environment. In all other cases it
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will not be called. Whenever you \Ref{print}() a page range from a
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\Ref{DjVuDocument}, the #DjVuToPS# has to decode the mentioned pages
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before writing them to the output \Ref{ByteStream}. This callback can be
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helpful to find out the status of the decoding. See
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\Ref{set_prn_progress_cb}() to find out how to learn the printing
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progress. See \Ref{set_info_cb}() to learn how to find out the number
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of the page being processed, the total number of pages and the number of
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processed pages.
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@param cb Callback function to be called
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@param data Pointer passed to #cb()#. */
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void set_dec_progress_cb(void (*cb)(double, void*), void *data);
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/** Callback used to report the current printing stage of a
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\Ref{DjVuDocument}. When printing a \Ref{DjVuDocument} ({\bf not} a
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\Ref{DjVuImage}), the #DjVuToPS# class will decode and output every page
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mentioned in the {\em page range}. Before decoding and outputing, it
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will call this #info_cb()# callback in order to let you know about what
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is going on. This can be quite useful in a GUI program to keep the user
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informed. This function is not called when you print a \Ref{DjVuImage}.
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Description of the arguments passed to #info_cb#:
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\begin{description}
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\item[page_num] The number of the page being processed
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\item[page_cnt] Counts how many pages have already been processed.
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\item[tot_pages] Counts how many pages will be output enventually.
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\item[stage] Describes the current processing stage
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(#DECODING# or #PRINTING#).
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\end{description}
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@param cb Callback function to be called
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@param data Pointer, which will be passed to #cb()#. */
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void set_info_cb(void (*cb)(int,int,int,Stage,void*), void *data);
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//@}
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/** Prints the specified \Ref{DjVuImage} #dimg# into the
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\Ref{ByteStream} #str#. The function will first scale
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the image to fit the #img_rect#, then extract #prn_rect#
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from the obtained bitmap and will output it in the
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PostScript format. The function generates a legal PostScript
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(or Encapsulated PostScript) file taking care of all comments
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conforming to Document Structure Conventions v. 3.0.
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{\bf Warning:} The zoom factor specified in \Ref{Options} does
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not affect the amount of data stored into the PostScript file.
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It will be used by the PostScript code to additionally scale
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the image. We cannot pre-scale it here, because we do not know
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the future resolution of the printer. The #img_rect# and
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#prn_rect# alone define how much data will be sent to printer.
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Using #img_rect# one can upsample or downsample the image prior
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to sending it to the printer.
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@param str \Ref{ByteStream} where PostScript output will be sent
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@param dimg \Ref{DjVuImage} to print
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@param img_rect Rectangle to which the \Ref{DjVuImage} will be scaled.
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Note that this parameters defines the amount of data
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that will actually be sent to the printer. The PostScript
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code can futher resize the image according to the
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#zoom# parameter from the \Ref{Options} structure.
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@param prn_rect Part of img_rect to send to printer.
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@param override_dpi Optional parameter allowing you to override
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dpi setting that would otherwise be extracted from #dimg# */
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void print(ByteStream&, GP<DjVuImage> dimg,
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const GRect &prn_rect, const GRect &img_rect,
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int override_dpi=-1 );
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/** Outputs the specifies pages from the \Ref{DjVuDocument} into the
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\Ref{ByteStream} in PostScript format. The function will generate a
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multipage PostScript document conforming to PS DSC 3.0 by storing into
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it every page mentioned in the #page_range#.
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If #page_range# is empty, all pages from the \Ref{DjVuDocument} #doc#
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will be printed. The #page_range# is a set of ranges separated by
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commas. Every range has this form: {\em start_page}[-{\em
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end_page}]. {\em end_page} is optional and can be less than the {\em
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start_page}, in which case the pages will be printed in the reverse
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order.
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Examples:
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\begin{itemize}
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\item {\bf 1-10} - Will print pages 1 to 10.
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\item {\bf 10-1} - Will print pages 1 to 10 in reverse order.
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\item {\bf 1-10,12-20} - Will print pages 1 to 20 with page 11 skipped.
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\end{itemize} */
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void print(ByteStream&, GP<DjVuDocument> doc, GUTF8String page_range);
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|
void print(ByteStream&, GP<DjVuDocument> doc);
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/** Default constructor. Initializes the class. */
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|
|
DjVuToPS(void);
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|
};
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//****************************************************************************
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|
//******************************** DjVuToPS **********************************
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|
//****************************************************************************
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//@}
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// ------------
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|
#ifdef HAVE_NAMESPACES
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|
}
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|
# ifndef NOT_USING_DJVU_NAMESPACE
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|
using namespace DJVU;
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|
# endif
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|
#endif
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|
#endif
|