///
/// Parse the fonts from the page's resources structure including the encoding differences and CMAPs
///
public FontResource(string fontName, PdfReference resource, IAdobeGlyphList adobeGlyphList, ILogger logger)
{
// store some injected services
_adobeGlyphList = adobeGlyphList;
_logger = logger;
var resourceElements = (resource?.Value as PdfDictionary)?.Elements;
//Extract the encoding differences array
var differences = resourceElements?.GetDictionary("/Encoding")?.Elements?.GetArray("/Differences");
if (differences != null)
{
_differences = differences;
}
//Extract the CMAPs
var unicodeDictionary = resourceElements?.GetDictionary("/ToUnicode");
var stream = unicodeDictionary?.Stream;
if (stream != null)
{
_cmap = new CMap(stream, fontName, _logger);
}
}
public PdfSharpTextExtractor(IAdobeGlyphList adobeGlyphList, ILogger logger)
{
_adobeGlyphList = adobeGlyphList;
_logger = logger;
FontLookup = new Dictionary <string, FontResource>();
}
