[jira] [Created] (PDFBOX-2663) CMap handling bug

["Matthew GAO (JIRA)" <ji...@apache.org>]

Matthew GAO created PDFBOX-2663:
-----------------------------------

             Summary: CMap handling bug
                 Key: PDFBOX-2663
                 URL: https://issues.apache.org/jira/browse/PDFBOX-2663
             Project: PDFBox
          Issue Type: Bug
          Components: FontBox
    Affects Versions: 1.8.8
         Environment: Windows 7
            Reporter: Matthew GAO
             Fix For: 1.8.8


Some CMap includes another CMap using the "usecmap" command in the CMap resource file. For example, "ETenms-B5-H" includes "ETen-B5-H" CMap. The command in resource file is "/ETen-B5-H usecmap"

The CMapParser does handle this case. Please find the coding below:

if (op.op.equals(USECMAP))
                {
                    LiteralName useCmapName = (LiteralName) previousToken;
                    InputStream useStream = ResourceLoader.loadResource(resourceRoot + useCmapName.name);
                    if (useStream == null)
                    {
                        throw new IOException("Error: Could not find referenced cmap stream " + useCmapName.name);
                    }
                    CMap useCMap = parse(resourceRoot, useStream);
                    result.useCmap(useCMap);
                }

But the useCmap method of CMap class doesn't copy the cidRanges list from the child CMap. Please find the coding below:

    public void useCmap( CMap cmap )
    {
        this.codeSpaceRanges.addAll( cmap.codeSpaceRanges );
        this.singleByteMappings.putAll( cmap.singleByteMappings );
        this.doubleByteMappings.putAll( cmap.doubleByteMappings );
    }

Without the cidRanges from the included CMap, PDFBox doesn't know a text can be solved by the CMap and return "?" finally.

Suggest to add the following coding to useCmap method of CMap class to solve the problem.
this.cidRanges.addAll( cmap.cidRanges);




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