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/* lpdflib.c
Copyright 2006-2008 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 "luatex-api.h"
#include <ptexlib.h>
static const char _svn_version[] =
"$Id: lpdflib.c 2271 2009-04-12 23:42:21Z oneiros $ $URL: http://scm.foundry.supelec.fr/svn/luatex/trunk/source/texk/web2c/luatexdir/lua/lpdflib.c $";
static int findcurv(lua_State * L)
{
int j;
j = get_cur_v();
lua_pushnumber(L, j);
return 1;
}
static int findcurh(lua_State * L)
{
int j;
j = get_cur_h();
lua_pushnumber(L, j);
return 1;
}
int luapdfprint(lua_State * L)
{
int n;
unsigned i;
size_t len;
const char *outputstr, *st;
ctm_transform_modes literal_mode;
n = lua_gettop(L);
if (!lua_isstring(L, -1)) {
lua_pushstring(L, "no string to print");
lua_error(L);
}
literal_mode = set_origin;
if (n == 2) {
if (!lua_isstring(L, -2)) {
lua_pushstring(L, "invalid argument for print literal mode");
lua_error(L);
} else {
outputstr = (char *) lua_tostring(L, -2);
if (strcmp(outputstr, "direct") == 0)
literal_mode = direct_always;
else if (strcmp(outputstr, "page") == 0)
literal_mode = direct_page;
else {
lua_pushstring(L, "invalid argument for print literal mode");
lua_error(L);
}
}
} else {
if (n != 1) {
lua_pushstring(L, "invalid number of arguments");
lua_error(L);
}
}
check_pdfminorversion();
switch (literal_mode) {
case (set_origin):
pdf_goto_pagemode();
pos = synch_p_with_c(cur);
pdf_set_pos(pos.h, pos.v);
break;
case (direct_page):
pdf_goto_pagemode();
break;
case (direct_always):
pdf_end_string_nl();
break;
default:
assert(0);
}
st = lua_tolstring(L, n, &len);
for (i = 0; i < len; i++) {
if (i % 16 == 0)
pdfroom(16);
pdf_buf[pdf_ptr++] = st[i];
}
return 0;
}
/* DANGER! this should go into some header file */
#define obj_type_others 0
static int l_immediateobj(lua_State * L)
{
unsigned i;
size_t len;
const char *st;
if (!lua_isstring(L, -1))
luaL_error(L, "pdf.immediateobj needs string value");
pdf_create_obj(obj_type_others, 0);
pdf_begin_obj(obj_ptr, 1);
st = lua_tolstring(L, -1, &len);
for (i = 0; i < len; i++) {
if (i % 16 == 0)
pdfroom(16);
pdf_buf[pdf_ptr++] = st[i];
}
pdf_puts("\n");
pdf_end_obj();
lua_pop(L, 1);
lua_pushinteger(L, obj_ptr);
return 1;
}
static int getpdf(lua_State * L)
{
char *st;
if (lua_isstring(L, 2)) {
st = (char *) lua_tostring(L, 2);
if (st && *st) {
if (*st == 'h')
return findcurh(L);
else if (*st == 'v')
return findcurv(L);
}
}
lua_pushnil(L);
return 1;
}
static int setpdf(lua_State * L)
{
return (L == NULL ? 0 : 0); /* for -Wall */
}
static const struct luaL_reg pdflib[] = {
{"print", luapdfprint},
{"immediateobj", l_immediateobj},
{NULL, NULL} /* sentinel */
};
int luaopen_pdf(lua_State * L)
{
luaL_register(L, "pdf", pdflib);
/* build meta table */
luaL_newmetatable(L, "pdf_meta");
lua_pushstring(L, "__index");
lua_pushcfunction(L, getpdf);
/* do these later, NYI */
if (0) {
lua_settable(L, -3);
lua_pushstring(L, "__newindex");
lua_pushcfunction(L, setpdf);
}
lua_settable(L, -3);
lua_setmetatable(L, -2); /* meta to itself */
return 1;
}
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