source/texk/web2c/luatexdir/pdf/pdfthread.h

   1 /* pdfthread.h
   2
   3    Copyright 2009 Taco Hoekwater <taco@luatex.org>
   4
   5    This file is part of LuaTeX.
   6
   7    LuaTeX is free software; you can redistribute it and/or modify it under
   8    the terms of the GNU General Public License as published by the Free
   9    Software Foundation; either version 2 of the License, or (at your
  10    option) any later version.
  11
  12    LuaTeX is distributed in the hope that it will be useful, but WITHOUT
  13    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
  15    License for more details.
  16
  17    You should have received a copy of the GNU General Public License along
  18    with LuaTeX; if not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21
  22 #ifndef PDFTHREAD_H
  23 #  define PDFTHREAD_H
  24
  25 /* data structure of threads; words 1..4 represent the coordinates of the  corners */
  26
  27 #  define obj_thread_first obj_aux    /* pointer to the first bead */
  28
  29 /* data structure of beads */
  30 #  define pdfmem_bead_size 5   /* size of memory in |pdf->mem| which  |obj_bead_ptr| points to */
  31
  32 #  define set_pdf_thread_attr(A,B)      pdf_thread_attr(A)=B
  33 #  define set_pdf_thread_id(A,B)        pdf_thread_id(A)=B
  34 #  define set_pdf_thread_named_id(A,B)  pdf_thread_named_id(A)=B
  35
  36 #  define obj_bead_ptr                  obj_aux /* pointer to |pdf->mem| */
  37 #  define obj_bead_rect(pdf,A)          pdf->mem[obj_bead_ptr(pdf,A)]
  38 #  define obj_bead_page(pdf,A)          pdf->mem[obj_bead_ptr(pdf,A) + 1]
  39 #  define obj_bead_next(pdf,A)          pdf->mem[obj_bead_ptr(pdf,A) + 2]
  40 #  define obj_bead_prev(pdf,A)          pdf->mem[obj_bead_ptr(pdf,A) + 3]
  41 #  define obj_bead_attr(pdf,A)          pdf->mem[obj_bead_ptr(pdf,A) + 4]
  42 #  define obj_bead_data                 obj_bead_rect
  43 #  define set_obj_bead_data             set_obj_bead_rect
  44
  45 #  define set_obj_bead_rect(pdf,A,B)    obj_bead_rect(pdf,A)=B
  46 #  define set_obj_bead_page(pdf,A,B)    obj_bead_page(pdf,A)=B
  47 #  define set_obj_bead_next(pdf,A,B)    obj_bead_next(pdf,A)=B
  48 #  define set_obj_bead_prev(pdf,A,B)    obj_bead_prev(pdf,A)=B
  49 #  define set_obj_bead_attr(pdf,A,B)    obj_bead_attr(pdf,A)=B
  50
  51
  52 /*
  53     pointer to the corresponding whatsit node; |obj_bead_rect| is needed only when the bead
  54     rectangle has been written out and after that |obj_bead_data| is not needed any more
  55     so we can use this field for both
  56 */
  57
  58 extern void append_bead(PDF pdf, halfword p);
  59 extern void do_thread(PDF pdf, halfword parent_box, halfword p, scaledpos cur);
  60 extern void append_thread(PDF pdf, halfword parent_box, scaledpos cur);
  61 extern void end_thread(PDF pdf, halfword p);
  62 extern void scan_thread_id(void);
  63
  64 extern void thread_title(PDF pdf, int t);
  65 extern void pdf_fix_thread(PDF pdf, int t);
  66 extern void out_thread(PDF pdf, int t);
  67
  68 extern void check_running_thread(PDF pdf, halfword this_box, scaledpos cur);
  69 extern void print_bead_rectangles(PDF pdf);
  70 extern void flush_beads_list(void);
  71
  72 #endif