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/*
Copyright 2009-2010 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/>.
*/
#include "ptexlib.h"
const char *pdf_obj_typenames[PDF_OBJ_TYPE_MAX + 1] = {
"font", "outline", "dest", "obj", "xform", "ximage", "thread",
"pagestream", "page", "pages", "catalog", "info", "link", "annot", "annots",
"bead", "beads", "objstm", "others"
};
int pdf_last_annot;
int pdf_last_link;
int pdf_last_obj;
int pdf_retval;
/*tex
AVL sort entry into |avl_table[]|.
*/
static int compare_info(const void *pa, const void *pb, void *param)
{
const oentry *a = (const oentry *) pa;
const oentry *b = (const oentry *) pb;
(void) param;
if (a->u_type == b->u_type) {
if (a->u_type == union_type_int) {
return ((a->u.int0 < b->u.int0 ? -1 : (a->u.int0 > b->u.int0 ? 1 : 0)));
} else {
/*tex String type: */
return strcmp(a->u.str0, b->u.str0);
}
} else if (a->u_type == union_type_int) {
return -1;
} else {
return 1;
}
}
static void avl_put_obj(PDF pdf, int t, oentry * oe)
{
void **pp;
if (pdf->obj_tree[t] == NULL) {
pdf->obj_tree[t] = avl_create(compare_info, NULL, &avl_xallocator);
if (pdf->obj_tree[t] == NULL)
formatted_error("pdf backend","avl_create() pdf->obj_tree failed");
}
pp = avl_probe(pdf->obj_tree[t], oe);
if (pp == NULL)
formatted_error("pdf backend","avl_probe() out of memory in insertion");
}
static void avl_put_int_obj(PDF pdf, int int0, int objptr, int t)
{
oentry *oe = xtalloc(1, oentry);
oe->u.int0 = int0;
oe->u_type = union_type_int;
oe->objptr = objptr;
avl_put_obj(pdf, t, oe);
}
static void avl_put_str_obj(PDF pdf, char *str0, int objptr, int t)
{
oentry *oe = xtalloc(1, oentry);
/*tex No |xstrdup| here! */
oe->u.str0 = str0;
oe->u_type = union_type_cstring;
oe->objptr = objptr;
avl_put_obj(pdf, t, oe);
}
static int avl_find_int_obj(PDF pdf, int t, int i)
{
oentry *p;
oentry tmp;
tmp.u.int0 = i;
tmp.u_type = union_type_int;
if (pdf->obj_tree[t] == NULL)
return 0;
p = (oentry *) avl_find(pdf->obj_tree[t], &tmp);
if (p == NULL)
return 0;
return p->objptr;
}
static int avl_find_str_obj(PDF pdf, int t, char *s)
{
oentry *p;
oentry tmp;
tmp.u.str0 = s;
tmp.u_type = union_type_cstring;
if (pdf->obj_tree[t] == NULL)
return 0;
p = (oentry *) avl_find(pdf->obj_tree[t], &tmp);
if (p == NULL)
return 0;
return p->objptr;
}
/*tex Create an object with type |t| and identifier |i|: */
int pdf_create_obj(PDF pdf, int t, int i)
{
int a;
char *ss = NULL;
if (pdf->obj_ptr == sup_obj_tab_size)
overflow("indirect objects table size", (unsigned) pdf->obj_tab_size);
if (pdf->obj_ptr == pdf->obj_tab_size) {
a = pdf->obj_tab_size / 5;
if (pdf->obj_tab_size < sup_obj_tab_size - a)
pdf->obj_tab_size = pdf->obj_tab_size + a;
else
pdf->obj_tab_size = sup_obj_tab_size;
pdf->obj_tab = xreallocarray(pdf->obj_tab, obj_entry, (unsigned) pdf->obj_tab_size);
}
pdf->obj_ptr++;
obj_info(pdf, pdf->obj_ptr) = i;
obj_type(pdf, pdf->obj_ptr) = t;
set_obj_fresh(pdf, pdf->obj_ptr);
obj_aux(pdf, pdf->obj_ptr) = 0;
if (i < 0) {
ss = makecstring(-i);
avl_put_str_obj(pdf, ss, pdf->obj_ptr, t);
} else if (i > 0)
avl_put_int_obj(pdf, i, pdf->obj_ptr, t);
if (t <= HEAD_TAB_MAX) {
obj_link(pdf, pdf->obj_ptr) = pdf->head_tab[t];
pdf->head_tab[t] = pdf->obj_ptr;
if ((t == obj_type_dest) && (i < 0))
append_dest_name(pdf, makecstring(-obj_info(pdf, pdf->obj_ptr)), pdf->obj_ptr); /* why not just -i */
}
return pdf->obj_ptr;
}
int find_obj(PDF pdf, int t, int i, boolean byname)
{
char *ss = NULL;
int ret;
if (byname) {
ss = makecstring(i);
ret = avl_find_str_obj(pdf, t, ss);
free(ss);
} else {
ret = avl_find_int_obj(pdf, t, i);
}
return ret;
}
/*tex
The following function finds an object with identifier |i| and type |t|.
Identifier |i| is either an integer or a token list index. If no such object
exists then it will be created. This function is used mainly to find
destination for link annotations and outlines; however it is also used in
|ship_out| (to check whether a Page object already exists) so we need to
declare it together with subroutines needed in |hlist_out| and |vlist_out|.
*/
int pdf_get_obj(PDF pdf, int t, int i, boolean byname)
{
int r;
str_number s;
if (byname > 0) {
s = tokens_to_string(i);
r = find_obj(pdf, t, s, true);
} else {
s = 0;
r = find_obj(pdf, t, i, false);
}
if (r == 0) {
if (byname > 0) {
r = pdf_create_obj(pdf, t, -s);
s = 0;
} else {
r = pdf_create_obj(pdf, t, i);
}
if (t == obj_type_dest)
set_obj_dest_ptr(pdf, r, null);
}
if (s != 0)
flush_str(s);
return r;
}
/*tex Some object checking: */
void check_obj_exists(PDF pdf, int objnum)
{
if (objnum < 0 || objnum > pdf->obj_ptr)
normal_error("pdf backend", "cannot find referenced object");
}
void check_obj_type(PDF pdf, int t, int objnum)
{
int u;
check_obj_exists(pdf, objnum);
u = obj_type(pdf, objnum);
if (t != u) {
formatted_error("pdf backend", "referenced object has wrong type %s; should be %s",
pdf_obj_typenames[u], pdf_obj_typenames[t]);
}
}
void set_rect_dimens(PDF pdf, halfword p, halfword parent_box, scaledpos cur, scaled_whd alt_rule, scaled margin)
{
/*tex The positions relative to cur: */
scaledpos ll, ur;
scaledpos pos_ll, pos_ur, tmp;
posstructure localpos;
localpos.dir = pdf->posstruct->dir;
/*tex |pdf| contains current point on page: */
ll.h = 0;
if (is_running(alt_rule.dp))
ll.v = depth(parent_box) - cur.v;
else
ll.v = alt_rule.dp;
if (is_running(alt_rule.wd))
ur.h = width(parent_box) - cur.h;
else
ur.h = alt_rule.wd;
if (is_running(alt_rule.ht))
ur.v = -height(parent_box) - cur.v;
else
ur.v = -alt_rule.ht;
synch_pos_with_cur(&localpos, pdf->posstruct, ll);
pos_ll = localpos.pos;
synch_pos_with_cur(&localpos, pdf->posstruct, ur);
pos_ur = localpos.pos;
if (pos_ll.h > pos_ur.h) {
tmp.h = pos_ll.h;
pos_ll.h = pos_ur.h;
pos_ur.h = tmp.h;
}
if (pos_ll.v > pos_ur.v) {
tmp.v = pos_ll.v;
pos_ll.v = pos_ur.v;
pos_ur.v = tmp.v;
}
if (global_shipping_mode == SHIPPING_PAGE && matrixused()) {
matrixtransformrect(pos_ll.h, pos_ll.v, pos_ur.h, pos_ur.v);
pos_ll.h = getllx();
pos_ll.v = getlly();
pos_ur.h = geturx();
pos_ur.v = getury();
}
pdf_ann_left(p) = pos_ll.h - margin;
pdf_ann_bottom(p) = pos_ll.v - margin;
pdf_ann_right(p) = pos_ur.h + margin;
pdf_ann_top(p) = pos_ur.v + margin;
}
void libpdffinish(PDF pdf)
{
strbuf_free(pdf->fb);
xfree(pdf->job_id_string);
fm_free();
t1_free();
enc_free();
epdf_free();
ttf_free();
glyph_unicode_free();
zip_free(pdf);
}
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