File: pdfsaverestore.w

package info (click to toggle)
texlive-bin 2018.20181218.49446-1
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 186,920 kB
  • sloc: ansic: 873,264; cpp: 311,278; perl: 82,918; sh: 23,243; makefile: 8,590; lex: 4,939; python: 4,462; pascal: 3,813; java: 3,569; yacc: 2,901; tcl: 2,379; exp: 2,031; xml: 844; ruby: 678; lisp: 398; sed: 331; asm: 140; csh: 46; awk: 30
file content (81 lines) | stat: -rw-r--r-- 2,434 bytes parent folder | download | duplicates (3)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
% pdfsaverestore.w
%
% Copyright 2010 Taco Hoekwater <taco@@luatex.org>
%
% This file is part of LuaTeX.
%
% LuaTeX is free software; you can redistribute it and/or modify it under
% the terms of the GNU General Public License as published by the Free
% Software Foundation; either version 2 of the License, or (at your
% option) any later version.
%
% LuaTeX 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 Lesser General Public
% License for more details.
%
% You should have received a copy of the GNU General Public License along
% with LuaTeX; if not, see <http://www.gnu.org/licenses/>.

@ @c

#include "ptexlib.h"

@ @c
pos_entry *pos_stack = 0; /* the stack */
int pos_stack_size = 0;   /* initially empty */
int pos_stack_used = 0;   /* used entries */

@ @c
static void checkpdfsave(scaledpos pos)
{
    pos_entry *new_stack;
    if (pos_stack_used >= pos_stack_size) {
        pos_stack_size += STACK_INCREMENT;
        new_stack = xtalloc((unsigned) pos_stack_size, pos_entry);
        memcpy((void *) new_stack, (void *) pos_stack, (unsigned) pos_stack_used * sizeof(pos_entry));
        xfree(pos_stack);
        pos_stack = new_stack;
    }
    pos_stack[pos_stack_used].pos.h = pos.h;
    pos_stack[pos_stack_used].pos.v = pos.v;
    if (global_shipping_mode == SHIPPING_PAGE) {
        pos_stack[pos_stack_used].matrix_stack = matrix_stack_used;
    }
    pos_stack_used++;
}

@ @c
static void checkpdfrestore(scaledpos pos)
{
    scaledpos diff;
    if (pos_stack_used == 0) {
        normal_warning("pdf backend", "'restore' is missing a 'save'");
        return;
    }
    pos_stack_used--;
    diff.h = pos.h - pos_stack[pos_stack_used].pos.h;
    diff.v = pos.v - pos_stack[pos_stack_used].pos.v;
    if (diff.h != 0 || diff.v != 0) {
        formatted_warning("pdf backend","misplaced 'restore' by (%dsp, %dsp)", (int) diff.h, (int) diff.v);
    }
    if (global_shipping_mode == SHIPPING_PAGE) {
        matrix_stack_used = pos_stack[pos_stack_used].matrix_stack;
    }
}

@ @c
void pdf_out_save(PDF pdf, halfword p)
{
    (void) p;
    checkpdfsave(pdf->posstruct->pos);
    pdf_literal(pdf, 'q', set_origin, false);
}

@ @c
void pdf_out_restore(PDF pdf, halfword p)
{
    (void) p;
    checkpdfrestore(pdf->posstruct->pos);
    pdf_literal(pdf, 'Q', set_origin, false);
}