+/*********** Printing to PDF ************/
+
+gboolean ispdfspace(char c)
+{
+ return (c==0 || c==9 || c==10 || c==12 || c==13 || c==' ');
+}
+
+gboolean ispdfdelim(char c)
+{
+ return (c=='(' || c==')' || c=='<' || c=='>' || c=='[' || c==']' ||
+ c=='{' || c=='}' || c=='/' || c=='%');
+}
+
+void skipspace(char **p, char *eof)
+{
+ while (ispdfspace(**p) || **p=='%') {
+ if (**p=='%') while (*p!=eof && **p!=10 && **p!=13) (*p)++;
+ if (*p==eof) return;
+ (*p)++;
+ }
+}
+
+void free_pdfobj(struct PdfObj *obj)
+{
+ int i;
+
+ if (obj==NULL) return;
+ if ((obj->type == PDFTYPE_STRING || obj->type == PDFTYPE_NAME ||
+ obj->type == PDFTYPE_STREAM) && obj->str!=NULL)
+ g_free(obj->str);
+ if ((obj->type == PDFTYPE_ARRAY || obj->type == PDFTYPE_DICT ||
+ obj->type == PDFTYPE_STREAM) && obj->num>0) {
+ for (i=0; i<obj->num; i++)
+ free_pdfobj(obj->elts[i]);
+ g_free(obj->elts);
+ }
+ if ((obj->type == PDFTYPE_DICT || obj->type == PDFTYPE_STREAM) && obj->num>0) {
+ for (i=0; i<obj->num; i++)
+ g_free(obj->names[i]);
+ g_free(obj->names);
+ }
+ g_free(obj);
+}
+
+struct PdfObj *dup_pdfobj(struct PdfObj *obj)
+{
+ struct PdfObj *dup;
+ int i;
+
+ if (obj==NULL) return NULL;
+ dup = g_memdup(obj, sizeof(struct PdfObj));
+ if ((obj->type == PDFTYPE_STRING || obj->type == PDFTYPE_NAME ||
+ obj->type == PDFTYPE_STREAM) && obj->str!=NULL) {
+ if (obj->type == PDFTYPE_NAME) obj->len = strlen(obj->str);
+ dup->str = g_memdup(obj->str, obj->len+1);
+ }
+ if ((obj->type == PDFTYPE_ARRAY || obj->type == PDFTYPE_DICT ||
+ obj->type == PDFTYPE_STREAM) && obj->num>0) {
+ dup->elts = g_malloc(obj->num*sizeof(struct PdfObj *));
+ for (i=0; i<obj->num; i++)
+ dup->elts[i] = dup_pdfobj(obj->elts[i]);
+ }
+ if ((obj->type == PDFTYPE_DICT || obj->type == PDFTYPE_STREAM) && obj->num>0) {
+ dup->names = g_malloc(obj->num*sizeof(char *));
+ for (i=0; i<obj->num; i++)
+ dup->names[i] = g_strdup(obj->names[i]);
+ }
+ return dup;
+}
+
+void show_pdfobj(struct PdfObj *obj, GString *str)
+{
+ int i;
+ if (obj==NULL) return;
+ switch(obj->type) {
+ case PDFTYPE_CST:
+ if (obj->intval==1) g_string_append(str, "true");
+ if (obj->intval==0) g_string_append(str, "false");
+ if (obj->intval==-1) g_string_append(str, "null");
+ break;
+ case PDFTYPE_INT:
+ g_string_append_printf(str, "%d", obj->intval);
+ break;
+ case PDFTYPE_REAL:
+ g_string_append_printf(str, "%f", obj->realval);
+ break;
+ case PDFTYPE_STRING:
+ g_string_append_len(str, obj->str, obj->len);
+ break;
+ case PDFTYPE_NAME:
+ g_string_append(str, obj->str);
+ break;
+ case PDFTYPE_ARRAY:
+ g_string_append_c(str, '[');
+ for (i=0;i<obj->num;i++) {
+ if (i) g_string_append_c(str, ' ');
+ show_pdfobj(obj->elts[i], str);
+ }
+ g_string_append_c(str, ']');
+ break;
+ case PDFTYPE_DICT:
+ g_string_append(str, "<<");
+ for (i=0;i<obj->num;i++) {
+ g_string_append_printf(str, " %s ", obj->names[i]);
+ show_pdfobj(obj->elts[i], str);
+ }
+ g_string_append(str, " >>");
+ break;
+ case PDFTYPE_REF:
+ g_string_append_printf(str, "%d %d R", obj->intval, obj->num);
+ break;
+ }
+}
+
+void DEBUG_PRINTOBJ(struct PdfObj *obj)
+{
+ GString *s = g_string_new("");
+ show_pdfobj(obj, s);
+ puts(s->str);
+ g_string_free(s, TRUE);
+}
+
+// parse a PDF object; returns NULL if fails
+// THIS PARSER DOES NOT RECOGNIZE STREAMS YET
+
+struct PdfObj *parse_pdf_object(char **ptr, char *eof)
+{
+ struct PdfObj *obj, *elt;
+ char *p, *q, *r, *eltname;
+ int stack;
+
+ obj = g_malloc(sizeof(struct PdfObj));
+ p = *ptr;
+ skipspace(&p, eof);
+ if (p==eof) { g_free(obj); return NULL; }
+
+ // maybe a constant
+ if (!strncmp(p, "true", 4)) {
+ obj->type = PDFTYPE_CST;
+ obj->intval = 1;
+ *ptr = p+4;
+ return obj;
+ }
+ if (!strncmp(p, "false", 5)) {
+ obj->type = PDFTYPE_CST;
+ obj->intval = 0;
+ *ptr = p+5;
+ return obj;
+ }
+ if (!strncmp(p, "null", 4)) {
+ obj->type = PDFTYPE_CST;
+ obj->intval = -1;
+ *ptr = p+4;
+ return obj;
+ }
+
+ // or a number ?
+ obj->intval = strtol(p, &q, 10);
+ *ptr = q;
+ if (q!=p) {
+ if (*q == '.') {
+ obj->type = PDFTYPE_REAL;
+ obj->realval = strtod(p, ptr);
+ return obj;
+ }
+ if (ispdfspace(*q)) {
+ // check for indirect reference
+ skipspace(&q, eof);
+ obj->num = strtol(q, &r, 10);
+ if (r!=q) {
+ skipspace(&r, eof);
+ if (*r=='R') {
+ *ptr = r+1;
+ obj->type = PDFTYPE_REF;
+ return obj;
+ }
+ }
+ }
+ obj->type = PDFTYPE_INT;
+ return obj;
+ }
+
+ // a string ?
+ if (*p=='(') {
+ q=p+1; stack=1;
+ while (stack>0 && q!=eof) {
+ if (*q=='(') stack++;
+ if (*q==')') stack--;
+ if (*q=='\\') q++;
+ if (q!=eof) q++;
+ }
+ if (q==eof) { g_free(obj); return NULL; }
+ obj->type = PDFTYPE_STRING;
+ obj->len = q-p;
+ obj->str = g_malloc(obj->len+1);
+ obj->str[obj->len] = 0;
+ g_memmove(obj->str, p, obj->len);
+ *ptr = q;
+ return obj;
+ }
+ if (*p=='<' && p[1]!='<') {
+ q=p+1;
+ while (*q!='>' && q!=eof) q++;
+ if (q==eof) { g_free(obj); return NULL; }
+ q++;
+ obj->type = PDFTYPE_STRING;
+ obj->len = q-p;
+ obj->str = g_malloc(obj->len+1);
+ obj->str[obj->len] = 0;
+ g_memmove(obj->str, p, obj->len);
+ *ptr = q;
+ return obj;
+ }
+
+ // a name ?
+ if (*p=='/') {
+ q=p+1;
+ while (!ispdfspace(*q) && !ispdfdelim(*q)) q++;
+ obj->type = PDFTYPE_NAME;
+ obj->str = g_strndup(p, q-p);
+ *ptr = q;
+ return obj;
+ }
+
+ // an array ?
+ if (*p=='[') {
+ obj->type = PDFTYPE_ARRAY;
+ obj->num = 0;
+ obj->elts = NULL;
+ q=p+1; skipspace(&q, eof);
+ while (*q!=']') {
+ elt = parse_pdf_object(&q, eof);
+ if (elt==NULL) { free_pdfobj(obj); return NULL; }
+ obj->num++;
+ obj->elts = g_realloc(obj->elts, obj->num*sizeof(struct PdfObj *));
+ obj->elts[obj->num-1] = elt;
+ skipspace(&q, eof);
+ }
+ *ptr = q+1;
+ return obj;
+ }
+
+ // a dictionary ?
+ if (*p=='<' && p[1]=='<') {
+ obj->type = PDFTYPE_DICT;
+ obj->num = 0;
+ obj->elts = NULL;
+ obj->names = NULL;
+ q=p+2; skipspace(&q, eof);
+ while (*q!='>' || q[1]!='>') {
+ if (*q!='/') { free_pdfobj(obj); return NULL; }
+ r=q+1;
+ while (!ispdfspace(*r) && !ispdfdelim(*r)) r++;
+ eltname = g_strndup(q, r-q);
+ q=r; skipspace(&q, eof);
+ elt = parse_pdf_object(&q, eof);
+ if (elt==NULL) { g_free(eltname); free_pdfobj(obj); return NULL; }
+ obj->num++;
+ obj->elts = g_realloc(obj->elts, obj->num*sizeof(struct PdfObj *));
+ obj->names = g_realloc(obj->names, obj->num*sizeof(char *));
+ obj->elts[obj->num-1] = elt;
+ obj->names[obj->num-1] = eltname;
+ skipspace(&q, eof);
+ }
+ *ptr = q+2;
+ return obj;
+ }
+
+ // DOES NOT RECOGNIZE STREAMS YET (handle as subcase of dictionary)
+
+ g_free(obj);
+ return NULL;
+}
+
+struct PdfObj *get_dict_entry(struct PdfObj *dict, char *name)
+{
+ int i;
+
+ if (dict==NULL) return NULL;
+ if (dict->type != PDFTYPE_DICT) return NULL;
+ for (i=0; i<dict->num; i++)
+ if (!strcmp(dict->names[i], name)) return dict->elts[i];
+ return NULL;
+}
+
+struct PdfObj *get_pdfobj(GString *pdfbuf, struct XrefTable *xref, struct PdfObj *obj)
+{
+ char *p, *eof;
+ int offs, n;
+
+ if (obj==NULL) return NULL;
+ if (obj->type!=PDFTYPE_REF) return dup_pdfobj(obj);
+ if (obj->intval>xref->last) return NULL;
+ offs = xref->data[obj->intval];
+ if (offs<=0 || offs >= pdfbuf->len) return NULL;
+
+ p = pdfbuf->str + offs;
+ eof = pdfbuf->str + pdfbuf->len;
+ n = strtol(p, &p, 10);
+ if (n!=obj->intval) return NULL;
+ skipspace(&p, eof);
+ n = strtol(p, &p, 10);
+ skipspace(&p, eof);
+ if (strncmp(p, "obj", 3)) return NULL;
+ p+=3;
+ return parse_pdf_object(&p, eof);
+}
+
+// read the xref table of a PDF file in memory, and return the trailerdict
+
+struct PdfObj *parse_xref_table(GString *pdfbuf, struct XrefTable *xref, int offs)
+{
+ char *p, *q, *eof;
+ struct PdfObj *trailerdict, *obj;
+ int start, len, i;
+
+ if (strncmp(pdfbuf->str+offs, "xref", 4)) return NULL;
+ p = strstr(pdfbuf->str+offs, "trailer");
+ eof = pdfbuf->str + pdfbuf->len;
+ if (p==NULL) return NULL;
+ p+=8;
+ trailerdict = parse_pdf_object(&p, eof);
+ obj = get_dict_entry(trailerdict, "/Size");
+ if (obj!=NULL && obj->type == PDFTYPE_INT && obj->intval-1>xref->last)
+ make_xref(xref, obj->intval-1, 0);
+ obj = get_dict_entry(trailerdict, "/Prev");
+ if (obj!=NULL && obj->type == PDFTYPE_INT && obj->intval>0 && obj->intval!=offs) {
+ // recurse into older xref table
+ obj = parse_xref_table(pdfbuf, xref, obj->intval);
+ free_pdfobj(obj);
+ }
+ p = pdfbuf->str+offs+4;
+ skipspace(&p, eof);
+ if (*p<'0' || *p>'9') { free_pdfobj(trailerdict); return NULL; }
+ while (*p>='0' && *p<='9') {
+ start = strtol(p, &p, 10);
+ skipspace(&p, eof);
+ len = strtol(p, &p, 10);
+ skipspace(&p, eof);
+ if (len <= 0 || 20*len > eof-p) break;
+ if (start+len-1 > xref->last) make_xref(xref, start+len-1, 0);
+ for (i=start; i<start+len; i++) {
+ xref->data[i] = strtol(p, NULL, 10);
+ p+=20;
+ }
+ skipspace(&p, eof);
+ }
+ if (*p!='t') { free_pdfobj(trailerdict); return NULL; }
+ return trailerdict;
+}
+
+// parse the page tree
+
+int pdf_getpageinfo(GString *pdfbuf, struct XrefTable *xref,
+ struct PdfObj *pgtree, int nmax, struct PdfPageDesc *pages)
+{
+ struct PdfObj *obj, *kid;
+ int i, count, j;
+
+ obj = get_pdfobj(pdfbuf, xref, get_dict_entry(pgtree, "/Type"));
+ if (obj == NULL || obj->type != PDFTYPE_NAME)
+ return 0;
+ if (!strcmp(obj->str, "/Page")) {
+ free_pdfobj(obj);
+ pages->contents = dup_pdfobj(get_dict_entry(pgtree, "/Contents"));
+ obj = get_pdfobj(pdfbuf, xref, get_dict_entry(pgtree, "/Resources"));
+ if (obj!=NULL) {
+ free_pdfobj(pages->resources);
+ pages->resources = obj;
+ }
+ obj = get_pdfobj(pdfbuf, xref, get_dict_entry(pgtree, "/MediaBox"));
+ if (obj!=NULL) {
+ free_pdfobj(pages->mediabox);
+ pages->mediabox = obj;
+ }
+ obj = get_pdfobj(pdfbuf, xref, get_dict_entry(pgtree, "/Rotate"));
+ if (obj!=NULL && obj->type == PDFTYPE_INT)
+ pages->rotate = obj->intval;
+ free_pdfobj(obj);
+ return 1;
+ }
+ else if (!strcmp(obj->str, "/Pages")) {
+ free_pdfobj(obj);
+ obj = get_pdfobj(pdfbuf, xref, get_dict_entry(pgtree, "/Count"));
+ if (obj!=NULL && obj->type == PDFTYPE_INT &&
+ obj->intval>0 && obj->intval<=nmax) count = obj->intval;
+ else count = 0;
+ free_pdfobj(obj);
+ obj = get_pdfobj(pdfbuf, xref, get_dict_entry(pgtree, "/Resources"));
+ if (obj!=NULL)
+ for (i=0; i<count; i++) {
+ free_pdfobj(pages[i].resources);
+ pages[i].resources = dup_pdfobj(obj);
+ }
+ free_pdfobj(obj);
+ obj = get_pdfobj(pdfbuf, xref, get_dict_entry(pgtree, "/MediaBox"));
+ if (obj!=NULL)
+ for (i=0; i<count; i++) {
+ free_pdfobj(pages[i].mediabox);
+ pages[i].mediabox = dup_pdfobj(obj);
+ }
+ free_pdfobj(obj);
+ obj = get_pdfobj(pdfbuf, xref, get_dict_entry(pgtree, "/Rotate"));
+ if (obj!=NULL && obj->type == PDFTYPE_INT)
+ for (i=0; i<count; i++)
+ pages[i].rotate = obj->intval;
+ free_pdfobj(obj);
+ obj = get_pdfobj(pdfbuf, xref, get_dict_entry(pgtree, "/Kids"));
+ if (obj!=NULL && obj->type == PDFTYPE_ARRAY) {
+ for (i=0; i<obj->num; i++) {
+ kid = get_pdfobj(pdfbuf, xref, obj->elts[i]);
+ if (kid!=NULL) {
+ j = pdf_getpageinfo(pdfbuf, xref, kid, nmax, pages);
+ nmax -= j;
+ pages += j;
+ free_pdfobj(kid);
+ }
+ }
+ }
+ free_pdfobj(obj);
+ return count;
+ }
+ return 0;
+}
+
+// parse a PDF file in memory
+
+gboolean pdf_parse_info(GString *pdfbuf, struct PdfInfo *pdfinfo, struct XrefTable *xref)
+{
+ char *p;
+ int i, offs;
+ struct PdfObj *obj, *pages;
+
+ xref->n_alloc = xref->last = 0;
+ xref->data = NULL;
+ p = pdfbuf->str + pdfbuf->len-1;
+
+ while (*p!='s' && p!=pdfbuf->str) p--;
+ if (strncmp(p, "startxref", 9)) return FALSE; // fail
+ p+=9;
+ while (ispdfspace(*p) && p!=pdfbuf->str+pdfbuf->len) p++;
+ offs = strtol(p, NULL, 10);
+ if (offs <= 0 || offs > pdfbuf->len) return FALSE; // fail
+ pdfinfo->startxref = offs;
+
+ pdfinfo->trailerdict = parse_xref_table(pdfbuf, xref, offs);
+ if (pdfinfo->trailerdict == NULL) return FALSE; // fail
+
+ obj = get_pdfobj(pdfbuf, xref,
+ get_dict_entry(pdfinfo->trailerdict, "/Root"));
+ if (obj == NULL)
+ { free_pdfobj(pdfinfo->trailerdict); return FALSE; }
+ pages = get_pdfobj(pdfbuf, xref, get_dict_entry(obj, "/Pages"));
+ free_pdfobj(obj);
+ if (pages == NULL)
+ { free_pdfobj(pdfinfo->trailerdict); return FALSE; }
+ obj = get_pdfobj(pdfbuf, xref, get_dict_entry(pages, "/Count"));
+ if (obj == NULL || obj->type != PDFTYPE_INT || obj->intval<=0)
+ { free_pdfobj(pdfinfo->trailerdict); free_pdfobj(pages);
+ free_pdfobj(obj); return FALSE; }
+ pdfinfo->npages = obj->intval;
+ free_pdfobj(obj);
+
+ pdfinfo->pages = g_malloc0(pdfinfo->npages*sizeof(struct PdfPageDesc));
+ pdf_getpageinfo(pdfbuf, xref, pages, pdfinfo->npages, pdfinfo->pages);
+ free_pdfobj(pages);
+
+ return TRUE;
+}
+
+// add an entry to the xref table
+
+void make_xref(struct XrefTable *xref, int nobj, int offset)
+{
+ if (xref->n_alloc <= nobj) {
+ xref->n_alloc = nobj + 10;
+ xref->data = g_realloc(xref->data, xref->n_alloc*sizeof(int));
+ }
+ if (xref->last < nobj) xref->last = nobj;
+ xref->data[nobj] = offset;
+}
+
+// a wrapper for deflate
+
+GString *do_deflate(char *in, int len)
+{
+ GString *out;
+ z_stream zs;
+
+ zs.zalloc = Z_NULL;
+ zs.zfree = Z_NULL;
+ deflateInit(&zs, Z_DEFAULT_COMPRESSION);
+ zs.next_in = (Bytef *)in;
+ zs.avail_in = len;
+ zs.avail_out = deflateBound(&zs, len);
+ out = g_string_sized_new(zs.avail_out);
+ zs.next_out = (Bytef *)out->str;
+ deflate(&zs, Z_FINISH);
+ out->len = zs.total_out;
+ deflateEnd(&zs);
+ return out;
+}
+
+// prefix to scale the original page
+
+GString *make_pdfprefix(struct PdfPageDesc *pgdesc, double width, double height)
+{
+ GString *str;
+ double v[4], t, xscl, yscl;
+ int i;
+
+ str = g_string_new("q ");
+ if (pgdesc->rotate == 90) {
+ g_string_append_printf(str, "0 -1 1 0 0 %.2f cm ", height);
+ t = height; height = width; width = t;
+ }
+ if (pgdesc->rotate == 270) {
+ g_string_append_printf(str, "0 1 -1 0 %.2f 0 cm ", width);
+ t = height; height = width; width = t;
+ }
+ if (pgdesc->rotate == 180) {
+ g_string_append_printf(str, "-1 0 0 -1 %.2f %.2f cm ", width, height);
+ }
+ if (pgdesc->mediabox==NULL || pgdesc->mediabox->type != PDFTYPE_ARRAY ||
+ pgdesc->mediabox->num != 4) return str;
+ for (i=0; i<4; i++) {
+ if (pgdesc->mediabox->elts[i]->type == PDFTYPE_INT)
+ v[i] = pgdesc->mediabox->elts[i]->intval;
+ else if (pgdesc->mediabox->elts[i]->type == PDFTYPE_REAL)
+ v[i] = pgdesc->mediabox->elts[i]->realval;
+ else return str;
+ }
+ if (v[0]>v[2]) { t = v[0]; v[0] = v[2]; v[2] = t; }
+ if (v[1]>v[3]) { t = v[1]; v[1] = v[3]; v[3] = t; }
+ if (v[2]-v[0] < 1. || v[3]-v[1] < 1.) return str;
+ xscl = width/(v[2]-v[0]);
+ yscl = height/(v[3]-v[1]);
+ g_string_append_printf(str, "%.4f 0 0 %.4f %.2f %.2f cm ",
+ xscl, yscl, -v[0]*xscl, -v[1]*yscl);
+ return str;
+}
+
+// add an entry to a subentry of a directory
+
+struct PdfObj *mk_pdfname(char *name)
+{
+ struct PdfObj *obj;
+
+ obj = g_malloc(sizeof(struct PdfObj));
+ obj->type = PDFTYPE_NAME;
+ obj->str = g_strdup(name);
+ return obj;
+}
+
+struct PdfObj *mk_pdfref(int num)
+{
+ struct PdfObj *obj;
+
+ obj = g_malloc(sizeof(struct PdfObj));
+ obj->type = PDFTYPE_REF;
+ obj->intval = num;
+ obj->num = 0;
+ return obj;
+}
+
+gboolean iseq_obj(struct PdfObj *a, struct PdfObj *b)
+{
+ if (a==NULL || b==NULL) return (a==b);
+ if (a->type!=b->type) return FALSE;
+ if (a->type == PDFTYPE_CST || a->type == PDFTYPE_INT)
+ return (a->intval == b->intval);
+ if (a->type == PDFTYPE_REAL)
+ return (a->realval == b->realval);
+ if (a->type == PDFTYPE_NAME)
+ return !strcmp(a->str, b->str);
+ if (a->type == PDFTYPE_REF)
+ return (a->intval == b->intval && a->num == b->num);
+ return FALSE;
+}
+
+void add_dict_subentry(GString *pdfbuf, struct XrefTable *xref,
+ struct PdfObj *obj, char *section, int type, char *name, struct PdfObj *entry)
+{
+ struct PdfObj *sec;
+ int i, subpos;
+
+ subpos = -1;
+ for (i=0; i<obj->num; i++)
+ if (!strcmp(obj->names[i], section)) subpos = i;
+ if (subpos == -1) {
+ subpos = obj->num;
+ obj->num++;
+ obj->elts = g_realloc(obj->elts, obj->num*sizeof(struct PdfObj*));
+ obj->names = g_realloc(obj->names, obj->num*sizeof(char *));
+ obj->names[subpos] = g_strdup(section);
+ obj->elts[subpos] = NULL;
+ }
+ if (obj->elts[subpos]!=NULL && obj->elts[subpos]->type==PDFTYPE_REF) {
+ sec = get_pdfobj(pdfbuf, xref, obj->elts[subpos]);
+ free_pdfobj(obj->elts[subpos]);
+ obj->elts[subpos] = sec;
+ }
+ if (obj->elts[subpos]!=NULL && obj->elts[subpos]->type!=type)
+ { free_pdfobj(obj->elts[subpos]); obj->elts[subpos] = NULL; }
+ if (obj->elts[subpos] == NULL) {
+ obj->elts[subpos] = sec = g_malloc(sizeof(struct PdfObj));
+ sec->type = type;
+ sec->num = 0;
+ sec->elts = NULL;
+ sec->names = NULL;
+ }
+ sec = obj->elts[subpos];
+
+ subpos = -1;
+ if (type==PDFTYPE_DICT) {
+ for (i=0; i<sec->num; i++)
+ if (!strcmp(sec->names[i], name)) subpos = i;
+ if (subpos == -1) {
+ subpos = sec->num;
+ sec->num++;
+ sec->elts = g_realloc(sec->elts, sec->num*sizeof(struct PdfObj*));
+ sec->names = g_realloc(sec->names, sec->num*sizeof(char *));
+ sec->names[subpos] = g_strdup(name);
+ sec->elts[subpos] = NULL;
+ }
+ free_pdfobj(sec->elts[subpos]);
+ sec->elts[subpos] = entry;
+ }
+ if (type==PDFTYPE_ARRAY) {
+ for (i=0; i<sec->num; i++)
+ if (iseq_obj(sec->elts[i], entry)) subpos = i;
+ if (subpos == -1) {
+ subpos = sec->num;
+ sec->num++;
+ sec->elts = g_realloc(sec->elts, sec->num*sizeof(struct PdfObj*));
+ sec->elts[subpos] = entry;
+ }
+ else free_pdfobj(entry);
+ }
+}
+
+// draw a page's background
+
+void pdf_draw_solid_background(struct Page *pg, GString *str)
+{
+ double x, y;
+
+ g_string_append_printf(str,
+ "%.2f %.2f %.2f rg 0 0 %.2f %.2f re f ",
+ RGBA_RGB(pg->bg->color_rgba), pg->width, pg->height);
+ if (pg->bg->ruling == RULING_NONE) return;
+ g_string_append_printf(str,
+ "%.2f %.2f %.2f RG %.2f w ",
+ RGBA_RGB(RULING_COLOR), RULING_THICKNESS);
+ if (pg->bg->ruling == RULING_GRAPH) {
+ for (x=RULING_GRAPHSPACING; x<pg->width-1; x+=RULING_GRAPHSPACING)
+ g_string_append_printf(str, "%.2f 0 m %.2f %.2f l S ",
+ x, x, pg->height);
+ for (y=RULING_GRAPHSPACING; y<pg->height-1; y+=RULING_GRAPHSPACING)
+ g_string_append_printf(str, "0 %.2f m %.2f %.2f l S ",
+ y, pg->width, y);
+ return;
+ }
+ for (y=RULING_TOPMARGIN; y<pg->height-1; y+=RULING_SPACING)
+ g_string_append_printf(str, "0 %.2f m %.2f %.2f l S ",
+ y, pg->width, y);
+ if (pg->bg->ruling == RULING_LINED)
+ g_string_append_printf(str,
+ "%.2f %.2f %.2f RG %.2f 0 m %.2f %.2f l S ",
+ RGBA_RGB(RULING_MARGIN_COLOR),
+ RULING_LEFTMARGIN, RULING_LEFTMARGIN, pg->height);
+}
+
+int pdf_draw_bitmap_background(struct Page *pg, GString *str,
+ struct XrefTable *xref, GString *pdfbuf)
+{
+ BgPdfPage *pgpdf;
+ GdkPixbuf *pix;
+ GString *zpix;
+ char *buf, *p1, *p2;
+ int height, width, stride, x, y, chan;
+
+ if (pg->bg->type == BG_PDF) {
+ pgpdf = (struct BgPdfPage *)g_list_nth_data(bgpdf.pages, pg->bg->file_page_seq-1);
+ if (pgpdf == NULL) return -1;
+ if (pgpdf->dpi != PDFTOPPM_PRINTING_DPI) {
+ add_bgpdf_request(pg->bg->file_page_seq, 0, TRUE);
+ while (pgpdf->dpi != PDFTOPPM_PRINTING_DPI && bgpdf.status == STATUS_RUNNING)
+ gtk_main_iteration();
+ }
+ pix = pgpdf->pixbuf;
+ }
+ else pix = pg->bg->pixbuf;
+
+ if (gdk_pixbuf_get_bits_per_sample(pix) != 8) return -1;
+ if (gdk_pixbuf_get_colorspace(pix) != GDK_COLORSPACE_RGB) return -1;
+
+ width = gdk_pixbuf_get_width(pix);
+ height = gdk_pixbuf_get_height(pix);
+ stride = gdk_pixbuf_get_rowstride(pix);
+ chan = gdk_pixbuf_get_n_channels(pix);
+ if (chan!=3 && chan!=4) return -1;
+
+ g_string_append_printf(str, "q %.2f 0 0 %.2f 0 %.2f cm /ImBg Do Q ",
+ pg->width, -pg->height, pg->height);
+
+ p2 = buf = (char *)g_malloc(3*width*height);
+ for (y=0; y<height; y++) {
+ p1 = (char *)gdk_pixbuf_get_pixels(pix)+stride*y;
+ for (x=0; x<width; x++) {
+ *(p2++)=*(p1++); *(p2++)=*(p1++); *(p2++)=*(p1++);
+ if (chan==4) p1++;
+ }
+ }
+ zpix = do_deflate(buf, 3*width*height);
+ g_free(buf);
+
+ make_xref(xref, xref->last+1, pdfbuf->len);
+ g_string_append_printf(pdfbuf,
+ "%d 0 obj\n<< /Length %d /Filter /FlateDecode /Type /Xobject "
+ "/Subtype /Image /Width %d /Height %d /ColorSpace /DeviceRGB "
+ "/BitsPerComponent 8 >> stream\n",
+ xref->last, zpix->len, width, height);
+ g_string_append_len(pdfbuf, zpix->str, zpix->len);
+ g_string_free(zpix, TRUE);
+ g_string_append(pdfbuf, "endstream\nendobj\n");
+
+ return xref->last;
+}
+
+// draw a page's graphics
+
+void pdf_draw_page(struct Page *pg, GString *str, gboolean *use_hiliter)
+{
+ GList *layerlist, *itemlist;
+ struct Layer *l;
+ struct Item *item;
+ guint old_rgba;
+ double old_thickness;
+ double *pt;
+ int i;
+
+ old_rgba = 0x12345678; // not any values we use, so we'll reset them
+ old_thickness = 0.0;
+
+ for (layerlist = pg->layers; layerlist!=NULL; layerlist = layerlist->next) {
+ l = (struct Layer *)layerlist->data;
+ for (itemlist = l->items; itemlist!=NULL; itemlist = itemlist->next) {
+ item = (struct Item *)itemlist->data;
+ if (item->type == ITEM_STROKE) {
+ if ((item->brush.color_rgba & ~0xff) != old_rgba)
+ g_string_append_printf(str, "%.2f %.2f %.2f RG ",
+ RGBA_RGB(item->brush.color_rgba));
+ if (item->brush.thickness != old_thickness)
+ g_string_append_printf(str, "%.2f w ", item->brush.thickness);
+ if ((item->brush.color_rgba & 0xf0) != 0xf0) { // transparent
+ g_string_append(str, "q /XoHi gs ");
+ *use_hiliter = TRUE;
+ }
+ old_rgba = item->brush.color_rgba & ~0xff;
+ old_thickness = item->brush.thickness;
+ pt = item->path->coords;
+ g_string_append_printf(str, "%.2f %.2f m ", pt[0], pt[1]);
+ for (i=1, pt+=2; i<item->path->num_points; i++, pt+=2)
+ g_string_append_printf(str, "%.2f %.2f l ", pt[0], pt[1]);
+ g_string_append_printf(str,"S\n");
+ if ((item->brush.color_rgba & 0xf0) != 0xf0) // undo transparent
+ g_string_append(str, "Q ");
+ }
+ }
+ }
+}
+
+// main printing function
+
+/* we use the following object numbers, starting with n_obj_catalog:
+ 0 the document catalog
+ 1 the page tree
+ 2 the GS for the hiliters
+ 3 ... the page objects
+*/
+
+gboolean print_to_pdf(char *filename)
+{
+ FILE *f;
+ GString *pdfbuf, *pgstrm, *zpgstrm, *tmpstr;
+ int n_obj_catalog, n_obj_pages_offs, n_page, n_obj_bgpix, n_obj_prefix;
+ int i, startxref;
+ struct XrefTable xref;
+ GList *pglist;
+ struct Page *pg;
+ char *buf;
+ unsigned int len;
+ gboolean annot, uses_pdf;
+ gboolean use_hiliter;
+ struct PdfInfo pdfinfo;
+ struct PdfObj *obj;
+
+ f = fopen(filename, "w");
+ if (f == NULL) return FALSE;
+ annot = FALSE;
+ xref.data = NULL;
+ uses_pdf = FALSE;
+ for (pglist = journal.pages; pglist!=NULL; pglist = pglist->next) {
+ pg = (struct Page *)pglist->data;
+ if (pg->bg->type == BG_PDF) uses_pdf = TRUE;
+ }
+
+ if (uses_pdf && bgpdf.status != STATUS_NOT_INIT &&
+ g_file_get_contents(bgpdf.tmpfile_copy, &buf, &len, NULL) &&
+ !strncmp(buf, "%PDF-1.", 7)) {
+ // parse the existing PDF file
+ pdfbuf = g_string_new_len(buf, len);
+ g_free(buf);
+ if (pdfbuf->str[7]<'4') pdfbuf->str[7] = '4'; // upgrade to 1.4
+ annot = pdf_parse_info(pdfbuf, &pdfinfo, &xref);
+ if (!annot) {
+ g_string_free(pdfbuf, TRUE);
+ if (xref.data != NULL) g_free(xref.data);
+ }
+ }
+
+ if (!annot) {
+ pdfbuf = g_string_new("%PDF-1.4\n%\370\357\365\362\n");
+ xref.n_alloc = xref.last = 0;
+ xref.data = NULL;
+ }
+
+ // catalog and page tree
+ n_obj_catalog = xref.last+1;
+ n_obj_pages_offs = xref.last+4;
+ make_xref(&xref, n_obj_catalog, pdfbuf->len);
+ g_string_append_printf(pdfbuf,
+ "%d 0 obj\n<< /Type /Catalog /Pages %d 0 R >> endobj\n",
+ n_obj_catalog, n_obj_catalog+1);
+ make_xref(&xref, n_obj_catalog+1, pdfbuf->len);
+ g_string_append_printf(pdfbuf,
+ "%d 0 obj\n<< /Type /Pages /Kids [", n_obj_catalog+1);
+ for (i=0;i<journal.npages;i++)
+ g_string_append_printf(pdfbuf, "%d 0 R ", n_obj_pages_offs+i);
+ g_string_append_printf(pdfbuf, "] /Count %d >> endobj\n", journal.npages);
+ make_xref(&xref, n_obj_catalog+2, pdfbuf->len);
+ g_string_append_printf(pdfbuf,
+ "%d 0 obj\n<< /Type /ExtGState /CA 0.5 >> endobj\n",
+ n_obj_catalog+2);
+ xref.last = n_obj_pages_offs + journal.npages-1;
+
+ for (pglist = journal.pages, n_page = 0; pglist!=NULL;
+ pglist = pglist->next, n_page++) {
+ pg = (struct Page *)pglist->data;
+
+ // draw the background and page into pgstrm
+ pgstrm = g_string_new("");
+ g_string_printf(pgstrm, "q 1 0 0 -1 0 %.2f cm 1 J 1 j ", pg->height);
+ n_obj_bgpix = -1;
+ n_obj_prefix = -1;
+ if (pg->bg->type == BG_SOLID)
+ pdf_draw_solid_background(pg, pgstrm);
+ else if (pg->bg->type == BG_PDF && annot &&
+ pdfinfo.pages[pg->bg->file_page_seq-1].contents!=NULL) {
+ make_xref(&xref, xref.last+1, pdfbuf->len);
+ n_obj_prefix = xref.last;
+ tmpstr = make_pdfprefix(pdfinfo.pages+(pg->bg->file_page_seq-1),
+ pg->width, pg->height);
+ g_string_append_printf(pdfbuf,
+ "%d 0 obj\n<< /Length %d >> stream\n%s\nendstream\nendobj\n",
+ n_obj_prefix, tmpstr->len, tmpstr->str);
+ g_string_free(tmpstr, TRUE);
+ g_string_prepend(pgstrm, "Q ");
+ }
+ else if (pg->bg->type == BG_PIXMAP || pg->bg->type == BG_PDF)
+ n_obj_bgpix = pdf_draw_bitmap_background(pg, pgstrm, &xref, pdfbuf);
+ // draw the page contents
+ use_hiliter = FALSE;
+ pdf_draw_page(pg, pgstrm, &use_hiliter);
+ g_string_append_printf(pgstrm, "Q\n");
+
+ // deflate pgstrm and write it
+ zpgstrm = do_deflate(pgstrm->str, pgstrm->len);
+ g_string_free(pgstrm, TRUE);
+
+ make_xref(&xref, xref.last+1, pdfbuf->len);
+ g_string_append_printf(pdfbuf,
+ "%d 0 obj\n<< /Length %d /Filter /FlateDecode>> stream\n",
+ xref.last, zpgstrm->len);
+ g_string_append_len(pdfbuf, zpgstrm->str, zpgstrm->len);
+ g_string_free(zpgstrm, TRUE);
+ g_string_append(pdfbuf, "endstream\nendobj\n");
+
+ // write the page object
+
+ make_xref(&xref, n_obj_pages_offs+n_page, pdfbuf->len);
+ g_string_append_printf(pdfbuf,
+ "%d 0 obj\n<< /Type /Page /Parent %d 0 R /MediaBox [0 0 %.2f %.2f] ",
+ n_obj_pages_offs+n_page, n_obj_catalog+1, pg->width, pg->height);
+ if (n_obj_prefix>0) {
+ obj = get_pdfobj(pdfbuf, &xref, pdfinfo.pages[pg->bg->file_page_seq-1].contents);
+ if (obj->type != PDFTYPE_ARRAY) {
+ free_pdfobj(obj);
+ obj = dup_pdfobj(pdfinfo.pages[pg->bg->file_page_seq-1].contents);
+ }
+ g_string_append_printf(pdfbuf, "/Contents [%d 0 R ", n_obj_prefix);
+ if (obj->type == PDFTYPE_REF)
+ g_string_append_printf(pdfbuf, "%d %d R ", obj->intval, obj->num);
+ if (obj->type == PDFTYPE_ARRAY) {
+ for (i=0; i<obj->num; i++) {
+ show_pdfobj(obj->elts[i], pdfbuf);
+ g_string_append_c(pdfbuf, ' ');
+ }
+ }
+ free_pdfobj(obj);
+ g_string_append_printf(pdfbuf, "%d 0 R] ", xref.last);
+ }
+ else g_string_append_printf(pdfbuf, "/Contents %d 0 R ", xref.last);
+ g_string_append(pdfbuf, "/Resources ");
+
+ if (n_obj_prefix>0)
+ obj = dup_pdfobj(pdfinfo.pages[pg->bg->file_page_seq-1].resources);
+ else obj = NULL;
+ if (obj!=NULL && obj->type!=PDFTYPE_DICT)
+ { free_pdfobj(obj); obj=NULL; }
+ if (obj==NULL) {
+ obj = g_malloc(sizeof(struct PdfObj));
+ obj->type = PDFTYPE_DICT;
+ obj->num = 0;
+ obj->elts = NULL;
+ obj->names = NULL;
+ }
+ add_dict_subentry(pdfbuf, &xref,
+ obj, "/ProcSet", PDFTYPE_ARRAY, NULL, mk_pdfname("/PDF"));
+ if (n_obj_bgpix>0)
+ add_dict_subentry(pdfbuf, &xref,
+ obj, "/ProcSet", PDFTYPE_ARRAY, NULL, mk_pdfname("/ImageC"));
+ if (use_hiliter)
+ add_dict_subentry(pdfbuf, &xref,
+ obj, "/ExtGState", PDFTYPE_DICT, "/XoHi", mk_pdfref(n_obj_catalog+2));
+ if (n_obj_bgpix>0)
+ add_dict_subentry(pdfbuf, &xref,
+ obj, "/XObject", PDFTYPE_DICT, "/ImBg", mk_pdfref(n_obj_bgpix));
+ show_pdfobj(obj, pdfbuf);
+ free_pdfobj(obj);
+ g_string_append(pdfbuf, " >> endobj\n");
+ }
+
+ // PDF trailer
+ startxref = pdfbuf->len;
+ if (annot) g_string_append_printf(pdfbuf,
+ "xref\n%d %d\n", n_obj_catalog, xref.last-n_obj_catalog+1);
+ else g_string_append_printf(pdfbuf,
+ "xref\n0 %d\n0000000000 65535 f \n", xref.last+1);
+ for (i=n_obj_catalog; i<=xref.last; i++)
+ g_string_append_printf(pdfbuf, "%010d 00000 n \n", xref.data[i]);
+ g_string_append_printf(pdfbuf,
+ "trailer\n<< /Size %d /Root %d 0 R ", xref.last+1, n_obj_catalog);
+ if (annot) {
+ g_string_append_printf(pdfbuf, "/Prev %d ", pdfinfo.startxref);
+ // keeping encryption info somehow doesn't work.
+ // xournal can't annotate encrypted PDFs anyway...
+/*
+ obj = get_dict_entry(pdfinfo.trailerdict, "/Encrypt");
+ if (obj!=NULL) {
+ g_string_append_printf(pdfbuf, "/Encrypt ");
+ show_pdfobj(obj, pdfbuf);
+ }
+*/
+ }
+ g_string_append_printf(pdfbuf,
+ ">>\nstartxref\n%d\n%%%%EOF\n", startxref);
+
+ g_free(xref.data);
+ if (annot) {
+ free_pdfobj(pdfinfo.trailerdict);
+ // ...
+ }
+
+ if (fwrite(pdfbuf->str, 1, pdfbuf->len, f) < pdfbuf->len) {
+ fclose(f);
+ g_string_free(pdfbuf, TRUE);
+ return FALSE;
+ }
+ fclose(f);
+ g_string_free(pdfbuf, TRUE);
+ return TRUE;
+}
+
+/*********** Printing via libgnomeprint **********/
+
projects / xournal.git / commitdiff