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/*
* PDF file output routines.
*
* Copyright 2008 by Tobias Hoffmann.
*
* This file is licensed as noted in "COPYING"
* which should have been included with this file.
*
*/
#include <stdio.h>
#include <assert.h>
#include <stdarg.h>
#include <memory.h>
#include <stdlib.h>
#include <string.h>
#include "pdfutils.h"
#include "fontembed/embed.h"
void pdfOut_printf(pdfOut *pdf,const char *fmt,...) // {{{
{
assert(pdf);
int len;
va_list ap;
va_start(ap,fmt);
len=vprintf(fmt,ap);
va_end(ap);
pdf->filepos+=len;
}
// }}}
void pdfOut_putString(pdfOut *pdf,const char *str,int len) // {{{ - >len==-1: strlen()
{
assert(pdf);
assert(str);
if (len==-1) {
len=strlen(str);
}
putc('(',stdout);
// escape special chars: \0 \\ \( \) -- don't bother about balanced parens
int iA=0;
for (;len>0;iA++,len--) {
if ( (str[iA]<32)||(str[iA]>126) ) {
fwrite(str,1,iA,stdout);
fprintf(stdout,"\\%03o",(unsigned char)str[iA]);
pdf->filepos+=iA+4;
str+=iA+1;
iA=-1;
} else if ( (str[iA]=='(')||(str[iA]==')')||(str[iA]=='\\') ) {
fwrite(str,1,iA,stdout);
fprintf(stdout,"\\%c",str[iA]);
pdf->filepos+=iA+2;
str+=iA+1;
iA=-1;
}
}
pdf->filepos+=iA+2;
fwrite(str,1,iA,stdout);
putc(')',stdout);
}
// }}}
void pdfOut_putHexString(pdfOut *pdf,const char *str,int len) // {{{ - >len==-1: strlen()
{
assert(pdf);
assert(str);
if (len==-1) {
len=strlen(str);
}
pdf->filepos+=2*len+2;
putc('<',stdout);
for (;len>0;str++,len--) {
fprintf(stdout,"%02x",(unsigned char)*str);
}
putc('>',stdout);
}
// }}}
pdfOut *pdfOut_new() // {{{ - NULL on error
{
pdfOut *ret=malloc(sizeof(pdfOut));
if (ret) {
memset(ret,0,sizeof(pdfOut));
}
return ret;
}
// }}}
// NOTE: uses statically allocated buffer
const char *pdfOut_to_pdfdate(struct tm *curtm) // {{{
{
static char curdate[250];
if (!curtm) {
time_t curtime;
curtime = time(NULL);
curtm = localtime(&curtime);
}
strftime(curdate, sizeof(curdate), "D:%Y%m%d%H%M%S%z", curtm);
curdate[23]=0;
curdate[22]='\'';
curdate[21]=curdate[18];
curdate[20]=curdate[17];
curdate[19]='\'';
return curdate;
}
// }}}
int pdfOut_add_xref(pdfOut *pdf) // {{{ - returns obj_no
{
assert(pdf);
assert(pdf->xrefsize<=pdf->xrefalloc);
if (pdf->xrefsize==pdf->xrefalloc) {
long *tmp;
pdf->xrefalloc+=50;
tmp=realloc(pdf->xref,sizeof(long)*pdf->xrefalloc);
if (!tmp) {
pdf->xrefalloc=-1;
return -1;
}
pdf->xref=tmp;
}
pdf->xref[pdf->xrefsize++]=pdf->filepos;
return pdf->xrefsize; // xrefsize+1
}
// }}}
int pdfOut_add_page(pdfOut *pdf,int obj) // {{{ - returns false on error
{
assert(pdf);
assert(obj>0);
assert(pdf->pagessize<=pdf->pagesalloc);
if (pdf->pagessize==pdf->pagesalloc) {
int *tmp;
pdf->pagesalloc+=10;
tmp=realloc(pdf->pages,sizeof(int)*pdf->pagesalloc);
if (!tmp) {
pdf->pagesalloc=-1;
return 0;
}
pdf->pages=tmp;
}
pdf->pages[pdf->pagessize++]=obj;
return 1;
}
// }}}
int pdfOut_add_kv(pdfOut *pdf,const char *key,const char *val) // {{{ - returns false on error
{
assert(pdf);
assert(pdf->kvsize<=pdf->kvalloc);
if (pdf->kvsize==pdf->kvalloc) {
struct keyval_t *tmp;
pdf->kvalloc+=10;
tmp=realloc(pdf->kv,sizeof(struct keyval_t)*pdf->kvalloc);
if (!tmp) {
pdf->kvalloc=-1;
return 0;
}
pdf->kv=tmp;
}
pdf->kv[pdf->kvsize].key=strdup(key);
pdf->kv[pdf->kvsize].value=strdup(val);
if ( (!pdf->kv[pdf->kvsize].key)||(!pdf->kv[pdf->kvsize].value) ) {
return 0;
}
pdf->kvsize++;
return 1;
}
// }}}
int pdfOut_begin_pdf(pdfOut *pdf) // ,...output_device?...) // {{{ - false on error
{
assert(pdf);
assert(pdf->kvsize==0); // otherwise: finish_pdf has not been called
int pages_obj;
pdf->xrefsize=pdf->pagessize=0;
pdf->filepos=0;
pages_obj=pdfOut_add_xref(pdf); // fixed later
if (pages_obj!=1) {
return 0;
}
pdfOut_printf(pdf,"%%PDF-1.3\n");
return 1;
}
// }}}
void pdfOut_finish_pdf(pdfOut *pdf) // {{{
{
int iA;
int root_obj,info_obj=0,xref_start;
assert( (pdf)&&(pdf->filepos!=-1) );
// pages
const int pages_obj=1;
pdf->xref[0]=pdf->filepos; // now fix it
pdfOut_printf(pdf,"%d 0 obj\n"
"<</Type/Pages\n"
" /Count %d\n"
" /Kids [",
pages_obj,pdf->pagessize);
for (iA=0;iA<pdf->pagessize;iA++) {
pdfOut_printf(pdf,"%d 0 R ",pdf->pages[iA]);
}
pdfOut_printf(pdf,"]\n"
">>\n"
"endobj\n");
// rootdict
root_obj=pdfOut_add_xref(pdf);
pdfOut_printf(pdf,"%d 0 obj\n"
"<</Type/Catalog\n"
" /Pages %d 0 R\n"
">>\n"
"endobj\n",
root_obj,pages_obj);
// info
if (pdf->kvsize) {
info_obj=pdfOut_add_xref(pdf);
pdfOut_printf(pdf,"%d 0 obj\n"
"<<\n",
info_obj);
for (iA=0;iA<pdf->kvsize;iA++) {
pdfOut_printf(pdf," /%s ",pdf->kv[iA].key);
pdfOut_putString(pdf,pdf->kv[iA].value,-1);
pdfOut_printf(pdf,"\n");
}
pdfOut_printf(pdf,">>\n"
"endobj\n");
}
// TODO: some return-value checking (??)
// write xref
xref_start=pdf->filepos;
pdfOut_printf(pdf,"xref\n"
"%d %d\n"
"%010d 65535 f \n",
0,pdf->xrefsize+1,0);
for (iA=0;iA<pdf->xrefsize;iA++) {
pdfOut_printf(pdf,"%010ld 00000 n \n",
pdf->xref[iA]);
}
pdfOut_printf(pdf,"trailer\n"
"<<\n"
" /Size %d\n"
" /Root %d 0 R\n",
pdf->xrefsize+1,
root_obj);
if (info_obj) {
pdfOut_printf(pdf," /Info %d 0 R\n",info_obj);
}
pdfOut_printf(pdf,">>\n"
"startxref\n"
"%d\n"
"%%%%EOF\n",
xref_start);
// set to done
pdf->filepos=-1;
for (iA=0;iA<pdf->kvsize;iA++) {
free(pdf->kv[iA].key);
free(pdf->kv[iA].value);
}
pdf->kvsize=0;
}
// }}}
void pdfOut_free(pdfOut *pdf) // {{{
{
if (pdf) {
assert(pdf->kvsize==0); // otherwise: finish_pdf has not been called
free(pdf->kv);
free(pdf->pages);
free(pdf->xref);
free(pdf);
}
}
// }}}
static void pdfOut_outfn(const char *buf,int len,void *context) // {{{
{
pdfOut *pdf=(pdfOut *)context;
if (fwrite(buf,1,len,stdout)!=len) {
perror("Short write");
assert(0);
return;
}
pdf->filepos+=len;
}
// }}}
int pdfOut_write_font(pdfOut *pdf,EMB_PARAMS *emb) // {{{
{
assert(pdf);
assert(emb);
EMB_PDF_FONTDESCR *fdes=emb_pdf_fontdescr(emb);
if (!fdes) {
if (emb->outtype==EMB_FMT_STDFONT) { // std-14 font
const int f_obj=pdfOut_add_xref(pdf);
char *res=emb_pdf_simple_stdfont(emb);
if (!res) {
return 0;
}
pdfOut_printf(pdf,"%d 0 obj\n"
"%s"
"endobj\n"
,f_obj,res);
free(res);
return f_obj;
}
return 0;
}
const int ff_obj=pdfOut_add_xref(pdf);
pdfOut_printf(pdf,"%d 0 obj\n"
"<</Length %d 0 R\n"
,ff_obj,ff_obj+1);
if (emb_pdf_get_fontfile_subtype(emb)) {
pdfOut_printf(pdf," /Subtype /%s\n",
emb_pdf_get_fontfile_subtype(emb));
}
if (emb->outtype==EMB_FMT_TTF) {
pdfOut_printf(pdf," /Length1 %d 0 R\n"
,ff_obj+2);
} else if (emb->outtype==EMB_FMT_T1) { // TODO
pdfOut_printf(pdf," /Length1 ?\n"
" /Length2 ?\n"
" /Length3 ?\n"
);
}
pdfOut_printf(pdf,">>\n"
"stream\n");
long streamsize=-pdf->filepos;
const int outlen=emb_embed(emb,pdfOut_outfn,pdf);
streamsize+=pdf->filepos;
pdfOut_printf(pdf,"\nendstream\n"
"endobj\n");
const int l0_obj=pdfOut_add_xref(pdf);
assert(l0_obj==ff_obj+1);
pdfOut_printf(pdf,"%d 0 obj\n"
"%ld\n"
"endobj\n"
,l0_obj,streamsize);
if (emb->outtype==EMB_FMT_TTF) {
const int l1_obj=pdfOut_add_xref(pdf);
assert(l1_obj==ff_obj+2);
pdfOut_printf(pdf,"%d 0 obj\n"
"%d\n"
"endobj\n"
,l1_obj,outlen);
}
const int fd_obj=pdfOut_add_xref(pdf);
char *res=emb_pdf_simple_fontdescr(emb,fdes,ff_obj);
if (!res) {
free(fdes);
return 0;
}
pdfOut_printf(pdf,"%d 0 obj\n"
"%s"
"endobj\n"
,fd_obj,res);
free(res);
EMB_PDF_FONTWIDTHS *fwid=emb_pdf_fontwidths(emb);
if (!fwid) {
free(fdes);
return 0;
}
const int f_obj=pdfOut_add_xref(pdf);
res=emb_pdf_simple_font(emb,fdes,fwid,fd_obj);
if (!res) {
free(fwid);
free(fdes);
return 0;
}
pdfOut_printf(pdf,"%d 0 obj\n"
"%s"
"endobj\n"
,f_obj,res);
free(res);
free(fwid);
if (emb->plan&EMB_A_MULTIBYTE) {
res=emb_pdf_simple_cidfont(emb,fdes->fontname,f_obj);
if (!res) {
free(fdes);
return 0;
}
const int cf_obj=pdfOut_add_xref(pdf);
pdfOut_printf(pdf,"%d 0 obj\n"
"%s"
"endobj\n"
,cf_obj,res);
free(res);
free(fdes);
return cf_obj;
}
free(fdes);
return f_obj;
}
// }}}
#if 0
one_page(...parent,resources,mediabox,contents);
{
// " /Resources %d 0 R\n"
pdfOut_printf(pdf,"%d 0 obj\n"
"<</Type/Page\n"
" /Parent 1 0 R\n"
" /MediaBox [0 0 %d %d]\n"
" /Contents %d 0 R\n"
">>\n"
"endobj\n"
,,,PageWidth,PageLength // TODO: into pdf->
...
}
... pfb_embedder ... pfa?
#endif
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