squilu/fltk/FL/Fl_Pdf.H

//
// "$Id: Fl_Pdf.H 7622 2010-05-27 17:50:51Z manolo $"
//
// Support for graphics output to PDF file for the Fast Light Tool Kit (FLTK).
//
// Copyright 2010 by Bill Spitzak and others.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
// Please report all bugs and problems on the following page:
//
//     http://www.fltk.org/str.php
//
/** \file Fl_Pdf.H
 \brief declaration of classes Fl_Pdf_Graphics_Driver, Fl_Pdf_File_Device.
 */


#ifndef Fl_Pdf_H
#define Fl_Pdf_H

#include <FL/Fl_Paged_Device.H>
#include <FL/fl_draw.H>
#include "hpdf.h"

/**
 \brief PDF graphical backend.
 *
 PDF text output is presently implemented only for the latin character set.
 FLTK's standard fonts are output using PDF's standard fonts: Helvetica, Courier,
 Times (and their bold, oblique, italic variants), Symbol, ZapfDingbats.
 */
class Fl_Pdf_Graphics_Driver : public Fl_Graphics_Driver {

#ifndef FL_DOXYGEN
public:
  enum SHAPE{NONE=0, LINE, LOOP, POLYGON, POINTS};

typedef struct page_format {
  int width;
  int height;
  const char *name;
} page_format;

class Clip {
  public:
    int x, y, w, h;
    Clip *prev;
  };
  Clip * clip_;

  int lang_level_;
  HPDF_Font pdf_font_;
  int gap_;
  int pages_;

  double width_;
  double height_;

  int shape_;
  int linewidth_;// need for clipping, lang level 1-2
  int linestyle_;//
  int interpolate_; //interpolation of images
  unsigned char cr_,cg_,cb_;
  char  linedash_[256];//should be enough
  void concat();  // transform ror scalable dradings...
  void reconcat(); //invert
  void recover(); //recovers the state after grestore (such as line styles...)
  void reset();

  uchar * mask;
  int mx; // width of mask;
  int my; // mask lines
  //Fl_Color bg_;
  int (*close_cmd_)(FILE *);
  int page_policy_;
  int nPages;
  int orientation_;

  float scale_x;
  float scale_y;
  float angle;
  int left_margin;
  int top_margin;

  FILE *output;
  double pw_, ph_;

  uchar bg_r, bg_g, bg_b;
  HPDF_Page pdf_page;
  HPDF_Doc pdf;
  char *text_buffer;
  int text_buffer_size;
  int start_PDF (int pagecount, enum Fl_Paged_Device::Page_Format format,
                 enum Fl_Paged_Device::Page_Layout layout);
  /*  int alpha_mask(const uchar * data, int w, int h, int D, int LD=0);
   */
  void draw(const char* s, int n, int x, int y) {transformed_draw(s,n,x,y); };
  void draw(int angle, const char *str, int n, int x, int y);
  void transformed_draw(const char* s, int n, double x, double y); //precise text placing
  void transformed_draw(const char* s, double x, double y);
  void rtl_draw(const char* str, int n, int x, int y);
  int alpha_mask(const uchar * data, int w, int h, int D, int LD=0);
  void draw_scaled_image(const uchar *data, double x, double y, double w, double h, int iw, int ih, int D=3, int LD=0);
  void draw_scaled_image_mono(const uchar *data, double x, double y, double w, double h, int iw, int ih, int D=3, int LD=0);
  void draw_scaled_image(Fl_Draw_Image_Cb call, void *data, double x, double y, double w, double h, int iw, int ih, int D);
  void draw_scaled_image_mono(Fl_Draw_Image_Cb call, void *data, double x, double y, double w, double h, int iw, int ih, int D);

  enum Fl_Paged_Device::Page_Format page_format_;
  char *pdf_filename_;
  // implementation of drawing methods
  void color(Fl_Color c);
  //void bg_color(Fl_Color bg);
  void color(uchar r, uchar g, uchar b);

  void push_clip(int x, int y, int w, int h);
  int clip_box(int x, int y, int w, int h, int &X, int &Y, int &W, int &H);
  int not_clipped(int x, int y, int w, int h);
  void push_no_clip();
  void pop_clip();

  void line_style(int style, int width=0, char* dashes=0);

  void rect(int x, int y, int w, int h);
  void rectf(int x, int y, int w, int h);

  void xyline(int x, int y, int x1);
  void xyline(int x, int y, int x1, int y2);
  void xyline(int x, int y, int x1, int y2, int x3);

  void yxline(int x, int y, int y1);
  void yxline(int x, int y, int y1, int x2);
  void yxline(int x, int y, int y1, int x2, int y3);

  void line(int x1, int y1, int x2, int y2);
  void line(int x1, int y1, int x2, int y2, int x3, int y3);

  void loop(int x0, int y0, int x1, int y1, int x2, int y2);
  void loop(int x0, int y0, int x1, int y1, int x2, int y2, int x3, int y3);
  void polygon(int x0, int y0, int x1, int y1, int x2, int y2);
  void polygon(int x0, int y0, int x1, int y1, int x2, int y2, int x3, int y3);
  void point(int x, int y);

  void begin_points();
  void begin_line();
  void begin_loop();
  void begin_polygon();
  void vertex(double x, double y);
  void curve(double x, double y, double x1, double y1, double x2, double y2, double x3, double y3);
  void circle(double x, double y, double r);
  void arc(double x, double y, double r, double start, double a);
  void arc(int x, int y, int w, int h, double a1, double a2);
  void pie(int x, int y, int w, int h, double a1, double a2);
  void end_points();
  void end_line();
  void end_loop();
  void end_polygon();
  void begin_complex_polygon(){begin_polygon();};
  void gap(){gap_=1;};
  void end_complex_polygon(){end_polygon();};
  void transformed_vertex(double x, double y);
  void fl_rotate(double d) {Fl_Graphics_Driver::rotate(-d);};

  void font(int face, int size);

  double width(const char* s, int n);
  int descent();
  int height();

  void draw_image(const uchar* d, int x,int y,int w,int h, int delta=3, int ldelta=0){draw_scaled_image(d,x,y,w,h,w,h,delta,ldelta);};
  void draw_image_mono(const uchar* d, int x,int y,int w,int h, int delta=1, int ld=0){draw_scaled_image_mono(d,x,y,w,h,w,h,delta,ld);};
  void draw_image(Fl_Draw_Image_Cb call, void* data, int x,int y, int w, int h, int delta=3){draw_scaled_image(call,data, x, y, w, h, w, h, delta);};
  void draw_image_mono(Fl_Draw_Image_Cb call, void* data, int x,int y, int w, int h, int delta=1){draw_scaled_image_mono(call, data, x, y, w, h, w, h, delta);};

  void draw(Fl_Pixmap * pxm,int XP, int YP, int WP, int HP, int cx, int cy);
  void draw(Fl_RGB_Image * rgb,int XP, int YP, int WP, int HP, int cx, int cy);
  void draw(Fl_Bitmap * bitmap,int XP, int YP, int WP, int HP, int cx, int cy);

public:
  static const char *class_id;
  const char *class_name() {return class_id;};
  void page_policy(int p);
  int page_policy(){return page_policy_;};
  void close_command( int (*cmd)(FILE *)){close_cmd_=cmd;};
  FILE * file() {return output;};
  //void orientation (int o);
  //Fl_Pdf_Graphics_Driver(FILE *o, int lang_level, int pages = 0); // ps (also multi-page) constructor
  //Fl_Pdf_Graphics_Driver(FILE *o, int lang_level, int x, int y, int w, int h); //eps constructor
  void interpolate(int i){interpolate_=i;};
  int interpolate(){return interpolate_;}

  void page(double pw, double ph, int media = 0);
  void page(int format);
  void page();

  void place(double x, double y, double tx, double ty, double scale = 1);
#endif // FL_DOXYGEN
  Fl_Pdf_Graphics_Driver();
  ~Fl_Pdf_Graphics_Driver();

  int xdpi() {return 72;};
  int ydpi() {return 72;};
};

/**
 \brief To send graphical output to a PDF file.
 */
class Fl_Pdf_File_Device : public Fl_Paged_Device {
#ifdef __APPLE__
  CGContextRef gc;
#endif
protected:
  Fl_Pdf_Graphics_Driver *driver();
public:
  static const char *class_id;
  const char *class_name() {return class_id;};
  Fl_Pdf_File_Device();
  ~Fl_Pdf_File_Device();
  void compress(int abool);
  HPDF_Doc pdf_doc();
  int start_job(int pagecount, enum Fl_Paged_Device::Page_Format format = Fl_Paged_Device::A4,
		enum Fl_Paged_Device::Page_Layout layout = Fl_Paged_Device::PORTRAIT);
  int start_job(const char *pdf_filename, int pagecount,
        enum Fl_Paged_Device::Page_Format format = Fl_Paged_Device::A4,
		enum Fl_Paged_Device::Page_Layout layout = Fl_Paged_Device::PORTRAIT);
  int start_page (void);
  int printable_rect(int *w, int *h);
  void margins(int *left, int *top, int *right, int *bottom);
  void origin(int x, int y);
  void scale (float scale_x, float scale_y);
  void rotate(float angle);
  void translate(int x, int y);
  void untranslate(void);
  int end_page (void);
  void end_job(void);
#ifdef __APPLE__
  void set_current() { fl_gc = gc; Fl_Paged_Device::set_current(); }
#endif

  static const char *file_chooser_title;
};

#endif // Fl_Pdf_H

//
// End of "$Id: Fl_Pdf.H 7622 2010-05-27 17:50:51Z manolo $"
//