private void _readPageResources(PdfDictionary page)
{
PdfValueList resources = page.ValueByName <PdfDictionary>("Resources", mandatory: false)?.Children;
if (resources != null)
{
for (int resourceIdx = 0; resourceIdx < resources.Count; ++resourceIdx)
{
if (resources[resourceIdx] is PdfName)
{
string cls = resources[resourceIdx].Cast <PdfName>().Value;
try {
if (++resourceIdx >= resources.Count)
{
throw new PdfException("Resource dictionary corrupt.");
}
switch (cls)
{
#if DEBUG_TEST
case "ProcSet":
System.Diagnostics.Debug.WriteLine("Resourse " + cls);
break;
case "Properties": {
var resourceItems = resources[resourceIdx].Resolve <PdfDictionary>();
if ((resourceItems.Children.Count % 2) != 0)
{
throw new PdfException("Resource dictionary corrupt.");
}
for (int ItemIdx = 0; ItemIdx < resourceItems.Children.Count - 1; ItemIdx += 2)
{
System.Diagnostics.Debug.WriteLine("Resourse " + cls + " " + resourceItems.Children[ItemIdx].Cast <PdfName>().Value + " removed.");
}
++resourceIdx;
}
break;
#else
case "ProcSet":
case "Properties":
++resourceIdx;
break;
#endif
case "Font":
case "XObject":
case "ExtGState":
case "ColorSpace": {
var resourceItems = resources[resourceIdx].Resolve <PdfDictionary>();
if ((resourceItems.Children.Count % 2) != 0)
{
throw new PdfException("Resource dictionary corrupt.");
}
for (int ItemIdx = 0; ItemIdx < resourceItems.Children.Count - 1; ItemIdx += 2)
{
var value = resourceItems.Children[ItemIdx + 1];
if (cls == "Font")
{
var fontDic = value.Resolve <PdfDictionary>();
if (new PdfName("Type").Equals(fontDic.Children[0]) &&
new PdfName("Font").Equals(fontDic.Children[1]) &&
new PdfName("Subtype").Equals(fontDic.Children[2]) &&
new PdfName("Type1").Equals(fontDic.Children[3]) &&
new PdfName("BaseFont").Equals(fontDic.Children[4]) &&
new PdfName("Encoding").Equals(fontDic.Children[6]) &&
new PdfName("WinAnsiEncoding").Equals(fontDic.Children[7]))
{
var stdFont = PdfStandard.Standard.FindStandardFontByName(fontDic.Children[5].Cast <PdfName>().Value);
if (stdFont != null)
{
value = stdFont;
}
}
}
_resources.Add(cls,
resourceItems.Children[ItemIdx].Cast <PdfName>().Value,
value);
}
}
break;
}
}
catch (Exception err) {
throw new PdfException("Processing resource '" + cls + "' failed.", err);
}
}
}
}
}