Q: I have some PDFs with corrupt font. How can I find the name of the
font that is giving this problem?
I would like to replace it with a generic font at least to extract an
image even if its not the right one.
If you don't mind, I appreciate any help.
----------------------
A: You could try to identify the font by iterating through all fonts
stored in the page resource dictionary. The pseudocode may look as
follows:
// JAVA pseudocode
private int testFonts() {
try {
//-For each page
int page_num = 0;
for (PageIterator itr = mPDFDocument.getPageIterator();
itr.hasNext()
{
Log.log("\tTesting fonts on page " + page_num);
Page page = (Page) (itr.next());
//---
Obj res = page.getResourceDict();
Obj fonts = null;
if (res != null)
fonts = res.findObj("Font");
if (fonts != null) {
for (DictIterator i = fonts.getDictIterator();
i.hasNext(); i.next();){
if (i.value() == null){
continue;
}
Font f = new Font(i.value());
String fontname = f.getName();
Log.log("Testing font " + fontname );
try{
f.getUnitsPerEm(); // this line will actually
load the font.
} catch (PDFNetException ex){
Log.warning("Error retrieving font " +
fontname + " from page " + page_num);
}
}
}
++page_num;
}
} catch (PDFNetException ex) {
Log.logException(ex);
return INTERNAL_ERROR;
}
return SUCCESS;
}
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