Review

13

com/itextpdf/text/pdf/CFFFontSubset.java

BuildNewLGSubrs(int)

class CFFFontSubset {
	/**
	 * Function builds the new local & global subsrs indices. IF CID then All of
	 * the FD Array lsubrs will be subsetted.
	 * @param Font the font
	 * @throws IOException
	 */
    @SuppressWarnings("unchecked")
    protected void BuildNewLGSubrs(int Font)throws IOException
	{
		// If the font is CID then the lsubrs are divided into FontDicts.
		// for each FD array the lsubrs will be subsetted.
		if(fonts[Font].isCID)
		{
			// Init the hashmap-array and the arraylist-array to hold the subrs used
			// in each private dict.
			hSubrsUsed = new HashMap[fonts[Font].fdprivateOffsets.length];
			lSubrsUsed = new ArrayList[fonts[Font].fdprivateOffsets.length];
			// A [][] which will store the byte array for each new FD Array lsubs index
			NewLSubrsIndex = new byte[fonts[Font].fdprivateOffsets.length][];
			// An array to hold the offset for each Lsubr index
			fonts[Font].PrivateSubrsOffset = new int[fonts[Font].fdprivateOffsets.length];
			// A [][] which will store the offset array for each lsubr index
			fonts[Font].PrivateSubrsOffsetsArray = new int[fonts[Font].fdprivateOffsets.length][];

			// Put the FDarrayUsed into a list
			ArrayList<Integer> FDInList = new ArrayList<Integer>(FDArrayUsed);
			// For each FD array which is used subset the lsubr
			for (int j=0;j<FDInList.size();j++)
			{
				// The FDArray index, Hash Map, Array List to work on
				int FD = FDInList.get(j).intValue();
				hSubrsUsed[FD] = new HashMap<Integer, int[]>();
				lSubrsUsed[FD] = new ArrayList<Integer>();
				//Reads the private dicts looking for the subr operator and
				// store both the offset for the index and its offset array
				BuildFDSubrsOffsets(Font,FD);
				// Verify that FDPrivate has a LSubrs index
				if(fonts[Font].PrivateSubrsOffset[FD]>=0)
				{
					//Scans the Charstring data storing the used Local and Global subroutines
					// by the glyphs. Scans the Subrs recursively.
					BuildSubrUsed(Font,FD,fonts[Font].PrivateSubrsOffset[FD],fonts[Font].PrivateSubrsOffsetsArray[FD],hSubrsUsed[FD],lSubrsUsed[FD]);
					// Builds the New Local Subrs index
					NewLSubrsIndex[FD] = BuildNewIndex(fonts[Font].PrivateSubrsOffsetsArray[FD],hSubrsUsed[FD],RETURN_OP);
				}
			}
		}
		// If the font is not CID && the Private Subr exists then subset:
		else if (fonts[Font].privateSubrs>=0)
		{
			// Build the subrs offsets;
			fonts[Font].SubrsOffsets = getIndex(fonts[Font].privateSubrs);
			//Scans the Charstring data storing the used Local and Global subroutines
			// by the glyphs. Scans the Subrs recursively.
			BuildSubrUsed(Font,-1,fonts[Font].privateSubrs,fonts[Font].SubrsOffsets,hSubrsUsedNonCID,lSubrsUsedNonCID);
		}
		// For all fonts subset the Global Subroutines
		// Scan the Global Subr Hashmap recursively on the Gsubrs
		BuildGSubrsUsed(Font);
		if (fonts[Font].privateSubrs>=0)
			// Builds the New Local Subrs index
			NewSubrsIndexNonCID = BuildNewIndex(fonts[Font].SubrsOffsets,hSubrsUsedNonCID,RETURN_OP);
		//Builds the New Global Subrs index
		NewGSubrsIndex = BuildNewIndex(gsubrOffsets,hGSubrsUsed,RETURN_OP);
	}

}