C++ pdf_to_int函数代码示例

static void
gathershadings(int page, pdf_obj *pageref, pdf_obj *pageobj, pdf_obj *dict)
{
	int i, n;

	n = pdf_dict_len(dict);
	for (i = 0; i < n; i++)
	{
		pdf_obj *shade;
		pdf_obj *type;
		int k;

		shade = pdf_dict_get_val(dict, i);
		if (!pdf_is_dict(shade))
		{
			fz_warn(ctx, "not a shading dict (%d %d R)", pdf_to_num(shade), pdf_to_gen(shade));
			continue;
		}

		type = pdf_dict_gets(shade, "ShadingType");
		if (!pdf_is_int(type) || pdf_to_int(type) < 1 || pdf_to_int(type) > 7)
		{
			fz_warn(ctx, "not a shading type (%d %d R)", pdf_to_num(shade), pdf_to_gen(shade));
			type = NULL;
		}

		for (k = 0; k < shadings; k++)
			if (!pdf_objcmp(shading[k].u.shading.obj, shade))
				break;

		if (k < shadings)
			continue;

		shadings++;

		shading = fz_resize_array(ctx, shading, shadings, sizeof(struct info));
		shading[shadings - 1].page = page;
		shading[shadings - 1].pageref = pageref;
		shading[shadings - 1].pageobj = pageobj;
		shading[shadings - 1].u.shading.obj = shade;
		shading[shadings - 1].u.shading.type = type;
	}
}

decode_params *
pdf_decode_params_load(pdf_obj *obj)
{
    decode_params *dp = pdf_malloc(sizeof(decode_params));

    if (!obj)
        return 0;
    if (!dp)
        return 0;
    memset(dp, 0, sizeof(decode_params));

    dp->predictor = pdf_to_int(pdf_dict_get(obj, "Predictor"));
    dp->colors = pdf_to_int(pdf_dict_get(obj, "Colors"));
    dp->bitspercomponent = pdf_to_int(pdf_dict_get(obj, "BitsPerComponent"));
    dp->columns = pdf_to_int(pdf_dict_get(obj, "Columns"));
    dp->earlychange = pdf_to_int(pdf_dict_get(obj, "EarlyChange"));

    return dp;
}

int
pdf_count_pages(pdf_document *doc)
{
	if (doc->page_count == 0)
	{
		pdf_obj *count = pdf_dict_getp(pdf_trailer(doc), "Root/Pages/Count");
		doc->page_count = pdf_to_int(count);
	}
	return doc->page_count;
}

static void
pdf_load_font_descriptor(pdf_font_desc *fontdesc, pdf_document *doc, pdf_obj *dict, char *collection, char *basefont, int iscidfont, int has_encoding)
{
	pdf_obj *obj1, *obj2, *obj3, *obj;
	char *fontname, *origname;
	FT_Face face;
	fz_context *ctx = doc->ctx;

	/* Prefer BaseFont; don't bother with FontName */
	origname = basefont;

	/* SumatraPDF: handle /BaseFont /Arial,Bold+000041 /FontName /Arial,Bold */
	if (strchr(basefont, '+') && pdf_is_name(pdf_dict_gets(dict, "FontName")))
		origname = pdf_to_name(pdf_dict_gets(dict, "FontName"));

	/* cf. http://code.google.com/p/sumatrapdf/issues/detail?id=1616 */
	if (strlen(origname) > 7 && origname[6] == '+')
		origname += 7;

	/* Look through list of alternate names for built in fonts */
	fontname = clean_font_name(origname);

	fontdesc->flags = pdf_to_int(pdf_dict_gets(dict, "Flags"));
	fontdesc->italic_angle = pdf_to_real(pdf_dict_gets(dict, "ItalicAngle"));
	fontdesc->ascent = pdf_to_real(pdf_dict_gets(dict, "Ascent"));
	fontdesc->descent = pdf_to_real(pdf_dict_gets(dict, "Descent"));
	fontdesc->cap_height = pdf_to_real(pdf_dict_gets(dict, "CapHeight"));
	fontdesc->x_height = pdf_to_real(pdf_dict_gets(dict, "XHeight"));
	fontdesc->missing_width = pdf_to_real(pdf_dict_gets(dict, "MissingWidth"));

	obj1 = pdf_dict_gets(dict, "FontFile");
	obj2 = pdf_dict_gets(dict, "FontFile2");
	obj3 = pdf_dict_gets(dict, "FontFile3");
	obj = obj1 ? obj1 : obj2 ? obj2 : obj3;

	if (pdf_is_indirect(obj))
	{
		fz_try(ctx)
		{
			pdf_load_embedded_font(doc, fontdesc, fontname, obj);
		}
		fz_catch(ctx)
		{
			fz_rethrow_if(ctx, FZ_ERROR_TRYLATER);
			fz_warn(ctx, "ignored error when loading embedded font; attempting to load system font");
			if (origname != fontname && !iscidfont)
				pdf_load_builtin_font(ctx, fontdesc, fontname);
			else
				pdf_load_system_font(ctx, fontdesc, fontname, collection, has_encoding);
		}
	}
	else
	{
		if (origname != fontname && !iscidfont)

ErrorCode juggler_add_pages_from_file(juggler_t *dest, juggler_t *src, int dest_index)
{
	pdf_obj *dest_pages = pdf_dict_getp(dest->ctx, 
		pdf_trailer(dest->ctx, dest->pdf), "Root/Pages");
	int dest_pages_index = pdf_array_len(dest->ctx, 
		pdf_dict_gets(dest->ctx, dest_pages, "Kids"));
		
	/* be aware that this function does not change the two variables if the page
	   index is greater than the number of pages */
	find_destination_pages(dest->ctx, 
		dest_pages, dest_index, &dest_pages, &dest_pages_index);

	pdf_obj *dest_kids = pdf_dict_gets(dest->ctx, dest_pages, "Kids");
	if(!pdf_is_indirect(dest->ctx, dest_pages) || 
		!pdf_is_dict(dest->ctx, dest_pages) || !pdf_is_array(dest->ctx, dest_kids))
	{
		return(ERROR_INVALID_RANGE);
	}
	
	pdf_obj *pages_root = pdf_dict_getp(src->ctx, pdf_trailer(src->ctx, src->pdf), "Root/Pages");
	if(!pdf_is_indirect(src->ctx, pages_root) || !pdf_is_dict(src->ctx, pages_root))
		return(ERROR_NO_PAGES);

	/* if we copy the root pages-node and it's referenced objects, we will copy 
	   all pages and all objects those pages need */
	pdf_obj *new_pages_ref = copy_object_single(dest->ctx, dest->pdf, src->ctx, src->pdf, pages_root);

	/* insert new pages-node */
	pdf_array_insert_drop(dest->ctx, dest_kids, new_pages_ref, dest_pages_index);

	/* update the parent */
	pdf_obj *new_pages_parent = pdf_new_indirect(dest->ctx, dest->pdf, 
		pdf_to_num(dest->ctx, dest_pages), pdf_to_gen(dest->ctx, dest_pages));
	pdf_dict_puts_drop(dest->ctx, new_pages_ref, "Parent", new_pages_parent);

	/* TODO: If dest_pages contains anything inheritable but not the new node
	         we need to insert empty items to prevent this inerhitance */

	/* update count */
	int new_count = pdf_to_int(dest->ctx, 
		pdf_dict_gets(dest->ctx, dest_pages, "Count")) + src->pagecount;
	pdf_dict_puts_drop(dest->ctx, dest_pages, "Count", 
		pdf_new_int(dest->ctx, dest->pdf, new_count));

	/* let MuPDF rebuild the page tree */
	pdf_finish_edit(dest->ctx, dest->pdf);
	dest->pdf->page_count = new_count;

	/* update juggler's state */
	juggler_page_tree_changed_due_to_insert(dest, dest_index, src->pagecount);

	return(NoError);
}

static fz_buffer *
pdf_load_image_stream(fz_context *ctx, pdf_document *doc, int num, int gen, int orig_num, int orig_gen, fz_compression_params *params, int *truncated)
{
	fz_stream *stm = NULL;
	pdf_obj *dict, *obj;
	int i, len, n;
	fz_buffer *buf;

	fz_var(buf);

	if (num > 0 && num < pdf_xref_len(ctx, doc))
	{
		pdf_xref_entry *entry = pdf_get_xref_entry(ctx, doc, num);
		/* Return ref to existing buffer, but only if uncompressed,
		 * or shortstoppable */
		if (can_reuse_buffer(ctx, entry, params))
			return fz_keep_buffer(ctx, entry->stm_buf);
	}

	dict = pdf_load_object(ctx, doc, num, gen);

	len = pdf_to_int(ctx, pdf_dict_get(ctx, dict, PDF_NAME_Length));
	obj = pdf_dict_get(ctx, dict, PDF_NAME_Filter);
	len = pdf_guess_filter_length(len, pdf_to_name(ctx, obj));
	n = pdf_array_len(ctx, obj);
	for (i = 0; i < n; i++)
		len = pdf_guess_filter_length(len, pdf_to_name(ctx, pdf_array_get(ctx, obj, i)));

	pdf_drop_obj(ctx, dict);

	stm = pdf_open_image_stream(ctx, doc, num, gen, orig_num, orig_gen, params);

	fz_try(ctx)
	{
		if (truncated)
			buf = fz_read_best(ctx, stm, len, truncated);
		else
			buf = fz_read_all(ctx, stm, len);
	}
	fz_always(ctx)
	{
		fz_drop_stream(ctx, stm);
	}
	fz_catch(ctx)
	{
		fz_rethrow_message(ctx, "cannot read raw stream (%d %d R)", num, gen);
	}

	return buf;
}

pdf_pattern *
pdf_load_pattern(fz_context *ctx, pdf_document *doc, pdf_obj *dict)
{
	pdf_pattern *pat;
	pdf_obj *obj;

	if ((pat = pdf_find_item(ctx, pdf_drop_pattern_imp, dict)) != NULL)
	{
		return pat;
	}

	pat = fz_malloc_struct(ctx, pdf_pattern);
	FZ_INIT_STORABLE(pat, 1, pdf_drop_pattern_imp);
	pat->document = doc;
	pat->resources = NULL;
	pat->contents = NULL;

	fz_try(ctx)
	{
		/* Store pattern now, to avoid possible recursion if objects refer back to this one */
		pdf_store_item(ctx, dict, pat, pdf_pattern_size(pat));

		pat->ismask = pdf_to_int(ctx, pdf_dict_get(ctx, dict, PDF_NAME_PaintType)) == 2;
		pat->xstep = pdf_to_real(ctx, pdf_dict_get(ctx, dict, PDF_NAME_XStep));
		pat->ystep = pdf_to_real(ctx, pdf_dict_get(ctx, dict, PDF_NAME_YStep));

		obj = pdf_dict_gets(ctx, dict, "BBox");
		pdf_to_rect(ctx, obj, &pat->bbox);

		obj = pdf_dict_gets(ctx, dict, "Matrix");
		if (obj)
			pdf_to_matrix(ctx, obj, &pat->matrix);
		else
			pat->matrix = fz_identity;

		pat->resources = pdf_dict_get(ctx, dict, PDF_NAME_Resources);
		if (pat->resources)
			pdf_keep_obj(ctx, pat->resources);

		pat->contents = pdf_keep_obj(ctx, dict);
	}
	fz_catch(ctx)
	{
		pdf_remove_item(ctx, pdf_drop_pattern_imp, dict);
		pdf_drop_pattern(ctx, pat);
		fz_rethrow_message(ctx, "cannot load pattern (%d %d R)", pdf_to_num(ctx, dict), pdf_to_gen(ctx, dict));
	}
	return pat;
}

pdf_pattern *
pdf_load_pattern(pdf_document *xref, pdf_obj *dict)
{
	pdf_pattern *pat;
	pdf_obj *obj;
	fz_context *ctx = xref->ctx;

	if ((pat = pdf_find_item(ctx, pdf_free_pattern_imp, dict)))
	{
		return pat;
	}

	pat = fz_malloc_struct(ctx, pdf_pattern);
	FZ_INIT_STORABLE(pat, 1, pdf_free_pattern_imp);
	pat->resources = NULL;
	pat->contents = NULL;

	/* Store pattern now, to avoid possible recursion if objects refer back to this one */
	pdf_store_item(ctx, dict, pat, pdf_pattern_size(pat));

	pat->ismask = pdf_to_int(pdf_dict_gets(dict, "PaintType")) == 2;
	pat->xstep = pdf_to_real(pdf_dict_gets(dict, "XStep"));
	pat->ystep = pdf_to_real(pdf_dict_gets(dict, "YStep"));

	obj = pdf_dict_gets(dict, "BBox");
	pdf_to_rect(ctx, obj, &pat->bbox);

	obj = pdf_dict_gets(dict, "Matrix");
	if (obj)
		pdf_to_matrix(ctx, obj, &pat->matrix);
	else
		pat->matrix = fz_identity;

	pat->resources = pdf_dict_gets(dict, "Resources");
	if (pat->resources)
		pdf_keep_obj(pat->resources);

	fz_try(ctx)
	{
		pat->contents = pdf_keep_obj(dict);
	}
	fz_catch(ctx)
	{
		pdf_remove_item(ctx, pdf_free_pattern_imp, dict);
		pdf_drop_pattern(ctx, pat);
		fz_throw(ctx, "cannot load pattern stream (%d %d R)", pdf_to_num(dict), pdf_to_gen(dict));
	}
	return pat;
}

static void
pdf_load_font_descriptor(pdf_font_desc *fontdesc, pdf_document *xref, pdf_obj *dict, char *collection, char *basefont)
{
	pdf_obj *obj1, *obj2, *obj3, *obj;
	char *fontname;
	char *origname;
	FT_Face face;
	fz_context *ctx = xref->ctx;

	if (!strchr(basefont, ',') || strchr(basefont, '+'))
		origname = pdf_to_name(pdf_dict_gets(dict, "FontName"));
	else
		origname = basefont;
	fontname = clean_font_name(origname);

	fontdesc->flags = pdf_to_int(pdf_dict_gets(dict, "Flags"));
	fontdesc->italic_angle = pdf_to_real(pdf_dict_gets(dict, "ItalicAngle"));
	fontdesc->ascent = pdf_to_real(pdf_dict_gets(dict, "Ascent"));
	fontdesc->descent = pdf_to_real(pdf_dict_gets(dict, "Descent"));
	fontdesc->cap_height = pdf_to_real(pdf_dict_gets(dict, "CapHeight"));
	fontdesc->x_height = pdf_to_real(pdf_dict_gets(dict, "XHeight"));
	fontdesc->missing_width = pdf_to_real(pdf_dict_gets(dict, "MissingWidth"));

	obj1 = pdf_dict_gets(dict, "FontFile");
	obj2 = pdf_dict_gets(dict, "FontFile2");
	obj3 = pdf_dict_gets(dict, "FontFile3");
	obj = obj1 ? obj1 : obj2 ? obj2 : obj3;

	if (pdf_is_indirect(obj))
	{
		fz_try(ctx)
		{
			pdf_load_embedded_font(fontdesc, xref, obj);
		}
		fz_catch(ctx)
		{
			fz_warn(ctx, "ignored error when loading embedded font; attempting to load system font");
			if (origname != fontname)
				pdf_load_builtin_font(ctx, fontdesc, fontname);
			else
				pdf_load_system_font(ctx, fontdesc, fontname, collection);
			/* RJW: "cannot load font descriptor (%d %d R)", pdf_to_num(dict), pdf_to_gen(dict) */
		}
	}
	else
	{
		if (origname != fontname)

static void
pdf_load_font_descriptor(pdf_font_desc *fontdesc, pdf_document *doc, pdf_obj *dict, char *collection, char *basefont, int iscidfont)
{
	pdf_obj *obj1, *obj2, *obj3, *obj;
	char *fontname, *origname;
	FT_Face face;
	fz_context *ctx = doc->ctx;

	/* Prefer BaseFont; don't bother with FontName */
	origname = basefont;

	/* Look through list of alternate names for built in fonts */
	fontname = clean_font_name(origname);

	fontdesc->flags = pdf_to_int(pdf_dict_gets(dict, "Flags"));
	fontdesc->italic_angle = pdf_to_real(pdf_dict_gets(dict, "ItalicAngle"));
	fontdesc->ascent = pdf_to_real(pdf_dict_gets(dict, "Ascent"));
	fontdesc->descent = pdf_to_real(pdf_dict_gets(dict, "Descent"));
	fontdesc->cap_height = pdf_to_real(pdf_dict_gets(dict, "CapHeight"));
	fontdesc->x_height = pdf_to_real(pdf_dict_gets(dict, "XHeight"));
	fontdesc->missing_width = pdf_to_real(pdf_dict_gets(dict, "MissingWidth"));

	obj1 = pdf_dict_gets(dict, "FontFile");
	obj2 = pdf_dict_gets(dict, "FontFile2");
	obj3 = pdf_dict_gets(dict, "FontFile3");
	obj = obj1 ? obj1 : obj2 ? obj2 : obj3;

	if (pdf_is_indirect(obj))
	{
		fz_try(ctx)
		{
			pdf_load_embedded_font(doc, fontdesc, fontname, obj);
		}
		fz_catch(ctx)
		{
			fz_rethrow_if(ctx, FZ_ERROR_TRYLATER);
			fz_warn(ctx, "ignored error when loading embedded font; attempting to load system font");
			if (origname != fontname && !iscidfont)
				pdf_load_builtin_font(ctx, fontdesc, fontname);
			else
				pdf_load_system_font(ctx, fontdesc, fontname, collection);
		}
	}
	else
	{
		if (origname != fontname && !iscidfont)

static fz_colorspace *
load_icc_based(pdf_document *xref, pdf_obj *dict)
{
	int n;

	n = pdf_to_int(pdf_dict_gets(dict, "N"));

	switch (n)
	{
	case 1: return fz_device_gray;
	case 3: return fz_device_rgb;
	case 4: return fz_device_cmyk;
	}

	fz_throw(xref->ctx, "syntaxerror: ICCBased must have 1, 3 or 4 components");
	return NULL; /* Stupid MSVC */
}

void
pdf_delete_page(pdf_document *doc, int at)
{
	pdf_obj *parent, *kids;
	int i;

	pdf_lookup_page_loc(doc, at, &parent, &i);
	kids = pdf_dict_gets(parent, "Kids");
	pdf_array_delete(kids, i);

	while (parent)
	{
		int count = pdf_to_int(pdf_dict_gets(parent, "Count"));
		pdf_dict_puts_drop(parent, "Count", pdf_new_int(doc, count - 1));
		parent = pdf_dict_gets(parent, "Parent");
	}
}

static void
pdf_load_transition(pdf_document *doc, pdf_page *page, pdf_obj *transdict)
{
	char *name;
	pdf_obj *obj;
	int type;

	obj = pdf_dict_gets(transdict, "D");
	page->transition.duration = (obj ? pdf_to_real(obj) : 1);

	page->transition.vertical = (pdf_to_name(pdf_dict_gets(transdict, "Dm"))[0] != 'H');
	page->transition.outwards = (pdf_to_name(pdf_dict_gets(transdict, "M"))[0] != 'I');
	/* FIXME: If 'Di' is None, it should be handled differently, but
	 * this only affects Fly, and we don't implement that currently. */
	page->transition.direction = (pdf_to_int(pdf_dict_gets(transdict, "Di")));
	/* FIXME: Read SS for Fly when we implement it */
	/* FIXME: Read B for Fly when we implement it */

	name = pdf_to_name(pdf_dict_gets(transdict, "S"));
	if (!strcmp(name, "Split"))
		type = FZ_TRANSITION_SPLIT;
	else if (!strcmp(name, "Blinds"))
		type = FZ_TRANSITION_BLINDS;
	else if (!strcmp(name, "Box"))
		type = FZ_TRANSITION_BOX;
	else if (!strcmp(name, "Wipe"))
		type = FZ_TRANSITION_WIPE;
	else if (!strcmp(name, "Dissolve"))
		type = FZ_TRANSITION_DISSOLVE;
	else if (!strcmp(name, "Glitter"))
		type = FZ_TRANSITION_GLITTER;
	else if (!strcmp(name, "Fly"))
		type = FZ_TRANSITION_FLY;
	else if (!strcmp(name, "Push"))
		type = FZ_TRANSITION_PUSH;
	else if (!strcmp(name, "Cover"))
		type = FZ_TRANSITION_COVER;
	else if (!strcmp(name, "Uncover"))
		type = FZ_TRANSITION_UNCOVER;
	else if (!strcmp(name, "Fade"))
		type = FZ_TRANSITION_FADE;
	else
		type = FZ_TRANSITION_NONE;
	page->transition.type = type;
}

pdfout_data *
pdfout_data_scalar_from_pdf (fz_context *ctx, pdf_obj *obj)
{
  const char *s;
  if (pdf_is_null (ctx, obj))
    return pdfout_data_scalar_new (ctx, "null", strlen ("null"));
  else if (pdf_is_bool (ctx, obj))
    {
      if (pdf_to_bool (ctx, obj))
	s = "true";
      else
	s = "false";
      return pdfout_data_scalar_new (ctx, s, strlen (s));
    }
  else if (pdf_is_name (ctx, obj))
    {
      s = pdf_to_name (ctx, obj);
      return pdfout_data_scalar_new (ctx, s, strlen (s));
    }
  else if (pdf_is_string (ctx, obj))
    {
      int len;
      char *str = pdfout_str_obj_to_utf8 (ctx, obj, &len);
      pdfout_data *result =  pdfout_data_scalar_new (ctx, str, len);
      free (str);
      return result;
    }
  else if (pdf_is_int (ctx, obj))
    {
      int n = pdf_to_int (ctx, obj);
      char buf[200];
      int len = pdfout_snprintf (ctx, buf, "%d", n);
      return pdfout_data_scalar_new (ctx, buf, len);
    }
  else if (pdf_is_real (ctx, obj))
    {
      float f = pdf_to_real (ctx, obj);
      char buf[200];
      int len = pdfout_snprintf (ctx, buf, "%g", f);
      return pdfout_data_scalar_new (ctx, buf, len);
    }
  else
    abort();
  
}

fz_buffer *
pdf_load_image_stream(pdf_document *xref, int num, int gen, int orig_num, int orig_gen, pdf_image_params *params)
{
	fz_context *ctx = xref->ctx;
	fz_stream *stm = NULL;
	pdf_obj *dict, *obj;
	int i, len, n;
	fz_buffer *buf;

	fz_var(buf);

	if (num > 0 && num < xref->len && xref->table[num].stm_buf)
		return fz_keep_buffer(xref->ctx, xref->table[num].stm_buf);

	dict = pdf_load_object(xref, num, gen);
	/* RJW: "cannot load stream dictionary (%d %d R)", num, gen */

	len = pdf_to_int(pdf_dict_gets(dict, "Length"));
	obj = pdf_dict_gets(dict, "Filter");
	len = pdf_guess_filter_length(len, pdf_to_name(obj));
	n = pdf_array_len(obj);
	for (i = 0; i < n; i++)
		len = pdf_guess_filter_length(len, pdf_to_name(pdf_array_get(obj, i)));

	pdf_drop_obj(dict);

	stm = pdf_open_image_stream(xref, num, gen, orig_num, orig_gen, params);
	/* RJW: "cannot open stream (%d %d R)", num, gen */

	fz_try(ctx)
	{
		buf = fz_read_all(stm, len);
	}
	fz_always(ctx)
	{
		fz_close(stm);
	}
	fz_catch(ctx)
	{
		fz_throw(ctx, "cannot read raw stream (%d %d R)", num, gen);
	}

	return buf;
}