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);
}
|