C++ pdf_new_dict函数代码示例

static void info_update(fz_context *ctx,pdf_document *xref,char *producer)

    {
    char moddate[64];
    time_t now;
    struct tm date;
    pdf_obj *info;
    int newinfo;

    if (xref->trailer==NULL)
        return;
    time(&now);
    date=(*localtime(&now));
    sprintf(moddate,"D:%04d%02d%02d%02d%02d%02d%s",
           date.tm_year+1900,date.tm_mon+1,date.tm_mday,
           date.tm_hour,date.tm_min,date.tm_sec,
           wsys_utc_string());
    info=pdf_dict_gets(xref->trailer,"Info");
    if (info==NULL)
        {
        newinfo=1;
        info=pdf_new_dict(ctx,2);
        }
    else
        newinfo=0;
    dict_put_string(ctx,info,"Producer",producer);
    dict_put_string(ctx,info,"ModDate",moddate);
    if (newinfo)
        {
        pdf_dict_puts(xref->trailer,"Info",info);
        pdf_drop_obj(info);
        }
    }

pdf_obj *
pdf_copy_dict(fz_context *ctx, pdf_obj *obj)
{
	pdf_document *doc;
	pdf_obj *dict;
	int i, n;

	RESOLVE(obj);
	if (!OBJ_IS_DICT(obj))
		fz_throw(ctx, FZ_ERROR_GENERIC, "not a dict (%s)", pdf_objkindstr(obj));

	doc = DICT(obj)->doc;
	n = pdf_dict_len(ctx, obj);
	dict = pdf_new_dict(ctx, doc, n);
	fz_try(ctx)
		for (i = 0; i < n; i++)
			pdf_dict_put(ctx, dict, pdf_dict_get_key(ctx, obj, i), pdf_dict_get_val(ctx, obj, i));
	fz_catch(ctx)
	{
		pdf_drop_obj(ctx, dict);
		fz_rethrow(ctx);
	}

	return dict;
}

/* Creates the PDF Encoding entry for the encoding.
 * If baseenc is non-null, it is used as BaseEncoding entry.
 */
static pdf_obj *
create_encoding_resource (pdf_encoding *encoding, pdf_encoding *baseenc)
{
  pdf_obj *differences;
  ASSERT(encoding);
  ASSERT(!encoding->resource);

  differences = make_encoding_differences(encoding->glyphs,
					  baseenc ? baseenc->glyphs : NULL,
					  encoding->is_used);
  
  if (differences) {
    pdf_obj *resource = pdf_new_dict();
    if (baseenc)
      pdf_add_dict(resource, pdf_new_name("BaseEncoding"),
		   pdf_link_obj(baseenc->resource));
    pdf_add_dict(resource, pdf_new_name("Differences"),  differences);
    return resource; 
  } else {
    /* Fix a bug with the MinionPro package using MnSymbol fonts
     * in its virtual fonts:
     *
     * Some font may have font_id even if no character is used.
     * For example, suppose that a virtual file A.vf uses two
     * other fonts, B and C. Even if only characters of B are used
     * in a DVI document, C will have font_id too.
     * In this case, both baseenc and differences can be NULL.
     *
     * Actually these fonts will be ignored in pdffont.c.
     */
    return baseenc ? pdf_link_obj(baseenc->resource) : NULL;
  }
}

static void
pdf_clean_stream_object(fz_context *ctx, pdf_document *doc, pdf_obj *obj, pdf_obj *orig_res, fz_cookie *cookie, int own_res,
		pdf_text_filter_fn *text_filter, pdf_after_text_object_fn *after_text, void *arg,
		int sanitize, int ascii)
{
	pdf_processor *proc_buffer = NULL;
	pdf_processor *proc_filter = NULL;
	pdf_obj *res = NULL;
	pdf_obj *ref;
	fz_buffer *buffer;

	if (!obj)
		return;

	fz_var(res);
	fz_var(proc_buffer);
	fz_var(proc_filter);

	buffer = fz_new_buffer(ctx, 1024);

	fz_try(ctx)
	{
		if (own_res)
		{
			pdf_obj *r = pdf_dict_get(ctx, obj, PDF_NAME(Resources));
			if (r)
				orig_res = r;
		}

		res = pdf_new_dict(ctx, doc, 1);

		proc_buffer = pdf_new_buffer_processor(ctx, buffer, ascii);
		proc_filter = pdf_new_filter_processor_with_text_filter(ctx, doc, proc_buffer, orig_res, res, text_filter, after_text, arg);

		pdf_process_contents(ctx, proc_filter, doc, orig_res, obj, cookie);
		pdf_close_processor(ctx, proc_filter);
		pdf_close_processor(ctx, proc_buffer);

		pdf_update_stream(ctx, doc, obj, buffer, 0);

		if (own_res)
		{
			ref = pdf_add_object(ctx, doc, res);
			pdf_dict_put_drop(ctx, obj, PDF_NAME(Resources), ref);
		}
	}
	fz_always(ctx)
	{
		pdf_drop_processor(ctx, proc_filter);
		pdf_drop_processor(ctx, proc_buffer);
		fz_drop_buffer(ctx, buffer);
		pdf_drop_obj(ctx, res);
	}
	fz_catch(ctx)
	{
		fz_rethrow(ctx);
	}
}

pdf_page *
pdf_create_page(pdf_document *doc, fz_rect mediabox, int res, int rotate)
{
	pdf_page *page = NULL;
	pdf_obj *pageobj;
	float userunit = 1;
	fz_context *ctx = doc->ctx;
	fz_matrix ctm, tmp;
	fz_rect realbox;

	page = fz_malloc_struct(ctx, pdf_page);

	fz_try(ctx)
	{
		page->resources = NULL;
		page->contents = NULL;
		page->transparency = 0;
		page->links = NULL;
		page->annots = NULL;
		page->me = pageobj = pdf_new_dict(doc, 4);

		pdf_dict_puts_drop(pageobj, "Type", pdf_new_name(doc, "Page"));

		page->mediabox.x0 = fz_min(mediabox.x0, mediabox.x1) * userunit;
		page->mediabox.y0 = fz_min(mediabox.y0, mediabox.y1) * userunit;
		page->mediabox.x1 = fz_max(mediabox.x0, mediabox.x1) * userunit;
		page->mediabox.y1 = fz_max(mediabox.y0, mediabox.y1) * userunit;
		pdf_dict_puts_drop(pageobj, "MediaBox", pdf_new_rect(doc, &page->mediabox));

		/* Snap page->rotate to 0, 90, 180 or 270 */
		if (page->rotate < 0)
			page->rotate = 360 - ((-page->rotate) % 360);
		if (page->rotate >= 360)
			page->rotate = page->rotate % 360;
		page->rotate = 90*((page->rotate + 45)/90);
		if (page->rotate > 360)
			page->rotate = 0;
		pdf_dict_puts_drop(pageobj, "Rotate", pdf_new_int(doc, page->rotate));

		fz_pre_rotate(fz_scale(&ctm, 1, -1), -page->rotate);
		realbox = page->mediabox;
		fz_transform_rect(&realbox, &ctm);
		fz_pre_scale(fz_translate(&tmp, -realbox.x0, -realbox.y0), userunit, userunit);
		fz_concat(&ctm, &ctm, &tmp);
		page->ctm = ctm;
		/* Do not create a Contents, as an empty Contents dict is not
		 * valid. See Bug 694712 */
	}
	fz_catch(ctx)
	{
		pdf_drop_obj(page->me);
		fz_free(ctx, page);
		fz_rethrow_message(ctx, "Failed to create page");
	}

	return page;
}

static void
pdf_clean_stream_object(fz_context *ctx, pdf_document *doc, pdf_obj *obj, pdf_obj *orig_res, fz_cookie *cookie, int own_res)
{
	pdf_processor *proc_buffer = NULL;
	pdf_processor *proc_filter = NULL;
	pdf_obj *res = NULL;
	pdf_obj *ref = NULL;
	fz_buffer *buffer;

	if (!obj)
		return;

	fz_var(res);
	fz_var(ref);
	fz_var(proc_buffer);
	fz_var(proc_filter);

	buffer = fz_new_buffer(ctx, 1024);

	fz_try(ctx)
	{
		if (own_res)
		{
			pdf_obj *r = pdf_dict_get(ctx, obj, PDF_NAME_Resources);
			if (r)
				orig_res = r;
		}

		res = pdf_new_dict(ctx, doc, 1);

		proc_buffer = pdf_new_buffer_processor(ctx, buffer);
		proc_filter = pdf_new_filter_processor(ctx, proc_buffer, doc, orig_res, res);

		pdf_process_contents(ctx, proc_filter, doc, orig_res, obj, cookie);

		pdf_update_stream(ctx, doc, obj, buffer, 0);

		if (own_res)
		{
			ref = pdf_new_ref(ctx, doc, res);
			pdf_dict_put(ctx, obj, PDF_NAME_Resources, ref);
		}
	}
	fz_always(ctx)
	{
		pdf_drop_processor(ctx, proc_filter);
		pdf_drop_processor(ctx, proc_buffer);
		fz_drop_buffer(ctx, buffer);
		pdf_drop_obj(ctx, res);
		pdf_drop_obj(ctx, ref);
	}
	fz_catch(ctx)
	{
		fz_rethrow_message(ctx, "Failed while cleaning xobject");
	}
}

static void
pdf_dev_alpha(fz_context *ctx, pdf_device *pdev, float alpha, int stroke)
{
	int i;
	pdf_document *doc = pdev->doc;
	gstate *gs = CURRENT_GSTATE(pdev);

	/* If the alpha is unchanged, nothing to do */
	if (gs->alpha[stroke] == alpha)
		return;

	/* Have we sent such an alpha before? */
	for (i = 0; i < pdev->num_alphas; i++)
		if (pdev->alphas[i].alpha == alpha && pdev->alphas[i].stroke == stroke)
			break;

	if (i == pdev->num_alphas)
	{
		pdf_obj *o;
		pdf_obj *ref = NULL;

		fz_var(ref);

		/* No. Need to make a new one */
		if (pdev->num_alphas == pdev->max_alphas)
		{
			int newmax = pdev->max_alphas * 2;
			if (newmax == 0)
				newmax = 4;
			pdev->alphas = fz_resize_array(ctx, pdev->alphas, newmax, sizeof(*pdev->alphas));
			pdev->max_alphas = newmax;
		}
		pdev->alphas[i].alpha = alpha;
		pdev->alphas[i].stroke = stroke;

		o = pdf_new_dict(ctx, doc, 1);
		fz_try(ctx)
		{
			char text[32];
			pdf_dict_put_drop(ctx, o, (stroke ? PDF_NAME_CA : PDF_NAME_ca), pdf_new_real(ctx, doc, alpha));
			ref = pdf_add_object(ctx, doc, o);
			fz_snprintf(text, sizeof(text), "ExtGState/Alp%d", i);
			pdf_dict_putp(ctx, pdev->resources, text, ref);
		}
		fz_always(ctx)
		{
			pdf_drop_obj(ctx, o);
			pdf_drop_obj(ctx, ref);
		}
		fz_catch(ctx)
		{
			fz_rethrow(ctx);
		}
		pdev->num_alphas++;
	}

static void page_merge(int page_from, int page_to, pdf_graft_map *graft_map)
{
	pdf_obj *pageref = NULL;
	pdf_obj *page_dict;
	pdf_obj *obj = NULL, *ref = NULL;
	/* Include minimal number of objects for page.  Do not include items that
	 * reference other pages */
	pdf_obj *known_page_objs[] = { PDF_NAME_Contents, PDF_NAME_Resources,
		PDF_NAME_MediaBox, PDF_NAME_CropBox, PDF_NAME_BleedBox, PDF_NAME_TrimBox,
		PDF_NAME_ArtBox, PDF_NAME_Rotate, PDF_NAME_UserUnit};
	int n = nelem(known_page_objs);
	int i;
	int num;

	fz_var(obj);
	fz_var(ref);

	fz_try(ctx)
	{
		pageref = pdf_lookup_page_obj(ctx, doc_src, page_from - 1);

		/* Make a new dictionary and copy over the items from the source object to
		* the new dict that we want to deep copy. */
		page_dict = pdf_new_dict(ctx, doc_des, 4);

		pdf_dict_put_drop(ctx, page_dict, PDF_NAME_Type, PDF_NAME_Page);

		for (i = 0; i < n; i++)
		{
			obj = pdf_dict_get(ctx, pageref, known_page_objs[i]);
			if (obj != NULL)
				pdf_dict_put_drop(ctx, page_dict, known_page_objs[i], pdf_graft_object(ctx, doc_des, doc_src, obj, graft_map));
		}

		/* Add the dictionary */
		obj = pdf_add_object_drop(ctx, doc_des, page_dict);

		/* Get indirect ref */
		num = pdf_to_num(ctx, obj);
		ref = pdf_new_indirect(ctx, doc_des, num, 0);

		/* Insert */
		pdf_insert_page(ctx, doc_des, page_to - 1, ref);
	}
	fz_always(ctx)
	{
		pdf_drop_obj(ctx, obj);
		pdf_drop_obj(ctx, ref);
	}
	fz_catch(ctx)
	{
		fz_rethrow(ctx);
	}
}

pdf_obj *parse_pdf_dict (char **start, char *end)
{
  pdf_obj *result, *tmp1, *tmp2;
  char *save = *start;
  skip_white(start, end);
  if (*((*start)++) != '<' ||
      *((*start)++) != '<') {
    *start = save;
    dump (*start, end);
    return NULL;
  }
  result = pdf_new_dict ();
    skip_white(start, end);
  while (*start < end &&
	 **start != '>') {
    if ((tmp1 = parse_pdf_name (start, end)) == NULL) {
      pdf_release_obj (result); 
      {
	*start = save;
	dump (*start, end);
	return NULL;
      }
    };
    if ((tmp2 = parse_pdf_object (start, end)) == NULL) {
      pdf_release_obj (result);
      pdf_release_obj (tmp1); 
      {
	*start = save;
	dump (*start, end);
	return NULL;
      }
    }
    pdf_add_dict (result, tmp1, tmp2);
    skip_white(start, end);
  }
  if (*start >= end) {
    pdf_release_obj (result);
    *start = save;
    dump (*start, end);
    return NULL;
  }
  if (*((*start)++) == '>' &&
      *((*start)++) == '>') {
    return result;
  } else {
    pdf_release_obj (result);
    fprintf (stderr, "\nDictionary object ended prematurely\n");
    *start = save;
    dump (*start, end);
    return NULL;
  }
}

static void html_make_link_dict (char *name)
{
  pdf_obj *color;
  if (!link_dict) {
    link_dict = pdf_new_dict();
    pdf_add_dict(link_dict, pdf_new_name("Type"), pdf_new_name ("Annot"));
    pdf_add_dict(link_dict, pdf_new_name("Subtype"), pdf_new_name ("Link"));
    color = pdf_new_array ();
    pdf_add_array (color, pdf_new_number (0));
    pdf_add_array (color, pdf_new_number (1));
    pdf_add_array (color, pdf_new_number (1));
    pdf_add_dict(link_dict, pdf_new_name("C"), color);
    if (name && *name == '#' && !(base_value)) {
      pdf_add_dict (link_dict, pdf_new_name("Dest"), pdf_new_string(name+1,strlen(name+1)));
    } else if (name) {    /* Assume its a URL */
      char *url;
      int len;
      pdf_obj *action;
      len = strlen(name)+1;
      if (base_value)
	len+=strlen(base_value);
      url = NEW (len, char);
      if (base_value)
	strcpy (url, base_value);
      else
	url[0] = 0;
      strcat (url, name);
      action = pdf_new_dict();
      pdf_add_dict (action, pdf_new_name ("Type"), pdf_new_name ("Action"));
      pdf_add_dict (action, pdf_new_name ("S"), pdf_new_name ("URI"));
      pdf_add_dict (action, pdf_new_name ("URI"),
		    pdf_new_string (url, len));
      pdf_add_dict (link_dict, pdf_new_name ("A"), pdf_ref_obj (action));
      pdf_release_obj (action);
      RELEASE (url);
    }
    pdf_doc_begin_annot (link_dict);
  } else {

/*
** From MuPDF pdfclean.c
*/
static void wmupdf_preserve_old_dests(pdf_obj *olddests,fz_context *ctx,pdf_document *xref,
                                      pdf_obj *pages)

    {
    int i;
    pdf_obj *names = pdf_new_dict(ctx,1);
    pdf_obj *dests = pdf_new_dict(ctx,1);
    pdf_obj *names_list = pdf_new_array(ctx,32);
    int len = pdf_dict_len(olddests);
    pdf_obj *root;

    for (i=0;i<len;i++)
        {
        pdf_obj *key = pdf_dict_get_key(olddests,i);
        pdf_obj *val = pdf_dict_get_val(olddests,i);
        pdf_obj *key_str = pdf_new_string(ctx,pdf_to_name(key),strlen(pdf_to_name(key)));
        pdf_obj *dest = pdf_dict_gets(val,"D");

        dest = pdf_array_get(dest ? dest : val, 0);
        if (pdf_array_contains(pdf_dict_gets(pages,"Kids"),dest))
            {
            pdf_array_push(names_list, key_str);
            pdf_array_push(names_list, val);
            }
        pdf_drop_obj(key_str);
        }

    root = pdf_dict_gets(xref->trailer,"Root");
    pdf_dict_puts(dests,"Names",names_list);
    pdf_dict_puts(names,"Dests",dests);
    pdf_dict_puts(root,"Names",names);

    pdf_drop_obj(names);
    pdf_drop_obj(dests);
    pdf_drop_obj(names_list);
    pdf_drop_obj(olddests);
    }

static pdf_obj *
hash_to_pdf_dict (fz_context *ctx, pdf_document *doc, pdfout_data *hash,
		  int *page)
{
  pdf_obj *dict_obj = pdf_new_dict (ctx, doc, 3);
  int len = pdfout_data_hash_len (ctx, hash);
  for (int j = 0; j < len; ++j)
    {
      char *key, *value;
      int value_len;
      pdfout_data_hash_get_key_value (ctx, hash, &key, &value, &value_len, j);

      if (streq (key, "page"))
	*page = pdfout_strtoint_null (ctx, value);
      else if (streq (key, "prefix"))
	{
	  pdf_obj *string = pdfout_utf8_to_str_obj (ctx, doc, value,
						    value_len);
	  pdf_dict_puts_drop (ctx, dict_obj, "P", string);
	}
      else if (streq (key, "first"))
	{
	  int first = pdfout_strtoint_null (ctx, value);
	  pdf_dict_puts_drop (ctx, dict_obj, "St",
			      pdf_new_int (ctx, doc, first));
	}
      else if (streq (key, "style"))
	{
	  const char *name;
	  if (streq (value, "arabic"))
	    name = "D";
	  else if (streq (value, "Roman"))
	    name = "R";
	  else if (streq (value, "roman"))
	    name = "r";
	  else if (streq (value, "Letters"))
	    name = "A";
	  else if (streq (value, "letters"))
	    name = "a";
	  else
	    abort ();
	  pdf_obj *name_obj = pdf_new_name (ctx, doc, name);
	  pdf_dict_puts_drop (ctx, dict_obj, "S", name_obj);
	}
     
    }

  return dict_obj;
}

/*
  put_pages_on_new_sheet() - put the contents of pages onto one page in dest_doc

  How does it work?
  1.  Create a page for the new sheet that will contain all source-pages
  2.  Analyze their sizes! If too small, just center. If too big, warn
  3.  Analye their userunit-value... if one of them != 1 we have to insert 
      scale-operations to all others and need to use userunit in the sheet too
  4.  Copy each entry of the resource-dicts of every page of the sheet 
      (if it has not already been copied for a previous sheet)
  5.  Create a dict that contains src-resource-name to dest-resource-name for 
      this sheet (this is an n:m relation where n >= m)
  6.  For each source-page-stream create a new content-stream and change
      scale (if user-unit is needed), translation and rotation... And add a 
      clipping-path around the page
  7.  Copy all source content-streams of the current page to this new content-
      stream renaming all its resources to the new names
  8.  TODO: Annots?
  9.  TODO: Preseparated pages
  10. TODO: Merge procedure sets 
*/
static int put_pages_on_new_sheet(fz_context *dest_ctx, pdf_document *dest_doc, 
	fz_context *src_ctx, pdf_document *src_doc, 
	struct pos_info *positions, size_t put_count)
{
	/* copy each entry of the resource dict */
	static const int RENAME_INITIAL_CAP = 128;
	struct put_info put_info = { dest_doc, src_doc, NULL, NULL, 0 };
	
	/* what destianation page is currently opened? */
	int sheet_pagenum = -1;
	pdf_page *sheet = NULL;
	
	size_t i;
	for(i = 0; i < put_count; i++) {
		/* if the current sheet changes, we need to close the current and open 
		   the new one*/
		if(sheet_pagenum != positions[i].sheet_pagenum) {
			if(sheet != NULL)
				pdf_drop_page(dest_ctx, sheet);
			sheet_pagenum = positions[i].sheet_pagenum;
			sheet = pdf_load_page(dest_ctx, dest_doc, sheet_pagenum);
			// TODO: We assume that the destination-page uses arrays for the
			// content and has a usable resoruce-dict... TODO: add those checks
		}
		
		/* load the source-page */
		pdf_page *src_page = pdf_load_page(src_ctx, src_doc, positions[i].src_pagenum);
		
		/* create a rename_dict */
		put_info.rename_dict = pdf_new_dict(dest_ctx, dest_doc, RENAME_INITIAL_CAP);
	
		/* copy all resources, adjust the page and finally copy the content */
		copy_and_rename_resources(dest_ctx, sheet->resources, 
			src_ctx, src_page->resources, &put_info);
		adjust_page_position(src_ctx, src_doc, src_page, positions + i);
		copy_content_streams_of_page(
			dest_ctx, sheet, src_ctx, src_page, &put_info, positions + i);

		/* free everything we created for that source-page */
		pdf_drop_obj(dest_ctx, put_info.rename_dict);
		pdf_drop_page(src_ctx, src_page);
	}

	if(sheet != NULL)
		pdf_drop_page(dest_ctx, sheet);

	return(0);
}

static pdf_obj *start_new_destpage(fz_context *ctx,double width_pts,double height_pts)

    {
    pdf_obj *pageobj;
    pdf_obj *mbox;

    pageobj=pdf_new_dict(ctx,2);
    pdf_dict_puts(pageobj,"Type",pdf_new_name(ctx,"Page"));
    mbox=pdf_new_array(ctx,4);
    pdf_array_push(mbox,pdf_new_real(ctx,0.));
    pdf_array_push(mbox,pdf_new_real(ctx,0.));
    pdf_array_push(mbox,pdf_new_real(ctx,width_pts));
    pdf_array_push(mbox,pdf_new_real(ctx,height_pts));
    pdf_dict_puts(pageobj,"MediaBox",mbox);
    return(pageobj);
    }

pdf_obj *
pdf_load_name_tree(pdf_document *xref, char *which)
{
	fz_context *ctx = xref->ctx;

	pdf_obj *root = pdf_dict_gets(xref->trailer, "Root");
	pdf_obj *names = pdf_dict_gets(root, "Names");
	pdf_obj *tree = pdf_dict_gets(names, which);
	if (pdf_is_dict(tree))
	{
		pdf_obj *dict = pdf_new_dict(ctx, 100);
		pdf_load_name_tree_imp(dict, xref, tree);
		return dict;
	}
	return NULL;
}