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authorJörg Frings-Fürst <debian@jff-webhosting.net>2016-12-01 22:31:35 +0100
committerJörg Frings-Fürst <debian@jff-webhosting.net>2016-12-01 22:31:35 +0100
commit3b43607cf603bd89df7e8c2946c18f30f3a9e027 (patch)
tree2f8d73cc63b6a47638adbdfc71d1357321eb71b9 /src/book.vala
parenta41f8de32b97f575a37525a52531369c8ec52e7a (diff)
parent4cd367d92ab485c92a00042abc28188d1a751ca0 (diff)
Merge tag 'upstream/3.23.2'
Upstream version 3.23.2
Diffstat (limited to 'src/book.vala')
-rw-r--r--src/book.vala123
1 files changed, 93 insertions, 30 deletions
diff --git a/src/book.vala b/src/book.vala
index 5782838..4119cfc 100644
--- a/src/book.vala
+++ b/src/book.vala
@@ -264,6 +264,22 @@ public class Book
var stream = file.replace (null, false, FileCreateFlags.NONE, null);
var writer = new PDFWriter (stream);
+ /* Choose object numbers */
+ var catalog_number = writer.add_object ();
+ var metadata_number = writer.add_object ();
+ var pages_number = writer.add_object ();
+ var info_number = writer.add_object ();
+ var page_numbers = new uint[n_pages];
+ var page_image_numbers = new uint[n_pages];
+ var page_content_numbers = new uint[n_pages];
+ for (var i = 0; i < n_pages; i++)
+ {
+ page_numbers[i] = writer.add_object ();
+ page_image_numbers[i] = writer.add_object ();
+ page_content_numbers[i] = writer.add_object ();
+ }
+ var struct_tree_root_number = writer.add_object ();
+
/* Header */
writer.write_string ("%PDF-1.3\n");
@@ -271,40 +287,59 @@ public class Book
writer.write_string ("%\xe2\xe3\xcf\xd3\n");
/* Catalog */
- var catalog_number = writer.start_object ();
+ writer.start_object (catalog_number);
writer.write_string ("%u 0 obj\n".printf (catalog_number));
writer.write_string ("<<\n");
writer.write_string ("/Type /Catalog\n");
- //FIXMEwriter.write_string ("/Metadata %u 0 R\n".printf (catalog_number + 1));
- //FIXMEwriter.write_string ("/MarkInfo << /Marked true >>");
- writer.write_string ("/Pages %u 0 R\n".printf (catalog_number + 1)); //+2
+ writer.write_string ("/Metadata %u 0 R\n".printf (metadata_number));
+ writer.write_string ("/MarkInfo << /Marked true >>\n");
+ writer.write_string ("/StructTreeRoot %u 0 R\n".printf (struct_tree_root_number));
+ writer.write_string ("/Pages %u 0 R\n".printf (pages_number));
writer.write_string (">>\n");
writer.write_string ("endobj\n");
/* Metadata */
- /* FIXME writer.write_string ("\n");
- number = writer.start_object ();
- writer.write_string ("%u 0 obj\n".printf (number));
+ var now = new DateTime.now_local ();
+ var date_string = now.format ("%FT%H:%M:%S%:z");
+ /* NOTE: The id has to be hardcoded to this value according to the spec... */
+ var metadata = """<?xpacket begin="%s" id="W5M0MpCehiHzreSzNTczkc9d"?>
+<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+ xmlns:xmp="http://ns.adobe.com/xap/1.0/">
+ <rdf:Description rdf:about=""
+ xmlns:pdfaid="http://www.aiim.org/pdfa/ns/id/"
+ xmlns:xmp="http://ns.adobe.com/xap/1.0/">
+ <pdfaid:part>1</pdfaid:part>
+ <pdfaid:conformance>A</pdfaid:conformance>
+ <xmp:CreatorTool>Simple Scan %s</xmp:CreatorTool>
+ <xmp:CreateDate>%s</xmp:CreateDate>
+ <xmp:ModifyDate>%s</xmp:ModifyDate>
+ <xmp:MetadataDate>%s</xmp:MetadataDate>
+ </rdf:Description>
+</rdf:RDF>
+<?xpacket end="w"?>""".printf (((unichar) 0xFEFF).to_string (), VERSION, date_string, date_string, date_string);
+ writer.write_string ("\n");
+ writer.start_object (metadata_number);
+ writer.write_string ("%u 0 obj\n".printf (metadata_number));
writer.write_string ("<<\n");
writer.write_string ("/Type /Metadata\n");
writer.write_string ("/Subtype /XML\n");
- writer.write_string ("/Length %u\n".printf (...));
+ writer.write_string ("/Length %u\n".printf (metadata.length));
writer.write_string (">>\n");
writer.write_string ("stream\n");
- // ...
+ writer.write_string (metadata);
writer.write_string ("\n");
writer.write_string ("endstream\n");
- writer.write_string ("endobj\n");*/
+ writer.write_string ("endobj\n");
/* Pages */
writer.write_string ("\n");
- var pages_number = writer.start_object ();
+ writer.start_object (pages_number);
writer.write_string ("%u 0 obj\n".printf (pages_number));
writer.write_string ("<<\n");
writer.write_string ("/Type /Pages\n");
writer.write_string ("/Kids [");
for (var i = 0; i < n_pages; i++)
- writer.write_string (" %u 0 R".printf (pages_number + 1 + (i*3)));
+ writer.write_string (" %u 0 R".printf (page_numbers[i]));
writer.write_string (" ]\n");
writer.write_string ("/Count %u\n".printf (n_pages));
writer.write_string (">>\n");
@@ -469,21 +504,21 @@ public class Book
/* Page */
writer.write_string ("\n");
- var number = writer.start_object ();
- writer.write_string ("%u 0 obj\n".printf (number));
+ writer.start_object (page_numbers[i]);
+ writer.write_string ("%u 0 obj\n".printf (page_numbers[i]));
writer.write_string ("<<\n");
writer.write_string ("/Type /Page\n");
writer.write_string ("/Parent %u 0 R\n".printf (pages_number));
- writer.write_string ("/Resources << /XObject << /Im%d %u 0 R >> >>\n".printf (i, number+1));
+ writer.write_string ("/Resources << /XObject << /Im%d %u 0 R >> >>\n".printf (i, page_image_numbers[i]));
writer.write_string ("/MediaBox [ 0 0 %s %s ]\n".printf (page_width.format (width_buffer, "%.2f"), page_height.format (height_buffer, "%.2f")));
- writer.write_string ("/Contents %u 0 R\n".printf (number+2));
+ writer.write_string ("/Contents %u 0 R\n".printf (page_content_numbers[i]));
writer.write_string (">>\n");
writer.write_string ("endobj\n");
/* Page image */
writer.write_string ("\n");
- number = writer.start_object ();
- writer.write_string ("%u 0 obj\n".printf (number));
+ writer.start_object (page_image_numbers[i]);
+ writer.write_string ("%u 0 obj\n".printf (page_image_numbers[i]));
writer.write_string ("<<\n");
writer.write_string ("/Type /XObject\n");
writer.write_string ("/Subtype /Image\n");
@@ -501,11 +536,20 @@ public class Book
writer.write_string ("endstream\n");
writer.write_string ("endobj\n");
+ /* Structure tree */
+ writer.write_string ("\n");
+ writer.start_object (struct_tree_root_number);
+ writer.write_string ("%u 0 obj\n".printf (struct_tree_root_number));
+ writer.write_string ("<<\n");
+ writer.write_string ("/Type /StructTreeRoot\n");
+ writer.write_string (">>\n");
+ writer.write_string ("endobj\n");
+
/* Page contents */
var command = "q\n%s 0 0 %s 0 0 cm\n/Im%d Do\nQ".printf (page_width.format (width_buffer, "%f"), page_height.format (height_buffer, "%f"), i);
writer.write_string ("\n");
- number = writer.start_object ();
- writer.write_string ("%u 0 obj\n".printf (number));
+ writer.start_object (page_content_numbers[i]);
+ writer.write_string ("%u 0 obj\n".printf (page_content_numbers[i]));
writer.write_string ("<<\n");
writer.write_string ("/Length %d\n".printf (command.length));
writer.write_string (">>\n");
@@ -520,7 +564,7 @@ public class Book
/* Info */
writer.write_string ("\n");
- var info_number = writer.start_object ();
+ writer.start_object (info_number);
writer.write_string ("%u 0 obj\n".printf (info_number));
writer.write_string ("<<\n");
writer.write_string ("/Creator (Simple Scan %s)\n".printf (VERSION));
@@ -531,16 +575,19 @@ public class Book
writer.write_string ("\n");
var xref_offset = writer.offset;
writer.write_string ("xref\n");
- writer.write_string ("0 %zu\n".printf (writer.object_offsets.length () + 1));
- writer.write_string ("0000000000 65535 f \n");
- foreach (var offset in writer.object_offsets)
- writer.write_string ("%010zu 00000 n \n".printf (offset));
+ writer.write_string ("0 %zu\n".printf (writer.object_offsets.length + 1));
+ writer.write_string ("%010zu 65535 f \n".printf (next_empty_object (writer, 0)));
+ for (var i = 0; i < writer.object_offsets.length; i++)
+ if (writer.object_offsets[i] == 0)
+ writer.write_string ("%010zu 65535 f \n".printf (next_empty_object (writer, i + 1)));
+ else
+ writer.write_string ("%010zu 00000 n \n".printf (writer.object_offsets[i]));
/* Trailer */
writer.write_string ("\n");
writer.write_string ("trailer\n");
writer.write_string ("<<\n");
- writer.write_string ("/Size %zu\n".printf (writer.object_offsets.length () + 1));
+ writer.write_string ("/Size %zu\n".printf (writer.object_offsets.length + 1));
writer.write_string ("/Info %u 0 R\n".printf (info_number));
writer.write_string ("/Root %u 0 R\n".printf (catalog_number));
writer.write_string ("/ID [<%s> <%s>]\n".printf (id, id));
@@ -550,6 +597,14 @@ public class Book
writer.write_string ("%%EOF\n");
}
+ static int next_empty_object (PDFWriter writer, int start)
+ {
+ for (var i = start; i < writer.object_offsets.length; i++)
+ if (writer.object_offsets[i] == 0)
+ return i + 1;
+ return 0;
+ }
+
public void save (string type, int quality, File file) throws Error
{
switch (type)
@@ -572,12 +627,13 @@ public class Book
private class PDFWriter
{
public size_t offset = 0;
- public List<uint> object_offsets;
+ public uint[] object_offsets;
private FileOutputStream stream;
public PDFWriter (FileOutputStream stream)
{
this.stream = stream;
+ object_offsets = new uint[0];
}
public void write (uint8[] data)
@@ -598,10 +654,17 @@ private class PDFWriter
write ((uint8[]) text.to_utf8 ());
}
- public uint start_object ()
+ public uint add_object ()
+ {
+ object_offsets.resize (object_offsets.length + 1);
+ var index = object_offsets.length - 1;
+ object_offsets[index] = 0;
+ return index + 1;
+ }
+
+ public void start_object (uint index)
{
- object_offsets.append ((uint)offset);
- return object_offsets.length ();
+ object_offsets[index - 1] = (uint)offset;
}
}