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- /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
- /* $Id$ */
-
- package org.apache.fop.render.ps.fonts;
-
- import java.io.IOException;
-
- import org.apache.fop.fonts.truetype.TTFGlyphOutputStream;
-
- /**
- * Streams glyphs in accordance with the constraints of the PostScript file format.
- * Mainly, PostScript strings have a limited capacity and the font data may have to be
- * broken down into several strings; however, this must occur at well-defined places like
- * table or glyph boundaries. See also Adobe Technical Note #5012, <em>The Type 42 Font
- * Format Specification</em>.
- */
- public class PSTTFGlyphOutputStream implements TTFGlyphOutputStream {
-
- /** Total number of bytes written so far. */
- private int byteCounter;
-
- private int lastStringBoundary;
-
- private PSTTFGenerator ttfGen;
-
- /**
- * Constructor
- * @param ttfGen PSTTFGenerator
- */
- public PSTTFGlyphOutputStream(PSTTFGenerator ttfGen) {
- this.ttfGen = ttfGen;
- }
-
- public void startGlyphStream() throws IOException {
- ttfGen.startString();
- }
-
- public void streamGlyph(byte[] glyphData, int offset, int size) throws IOException {
- if (size > PSTTFGenerator.MAX_BUFFER_SIZE) {
- throw new UnsupportedOperationException("The glyph is " + size
- + " bytes. There may be an error in the font file.");
- }
-
- if (size + (byteCounter - lastStringBoundary) < PSTTFGenerator.MAX_BUFFER_SIZE) {
- ttfGen.streamBytes(glyphData, offset, size);
- } else {
- ttfGen.endString();
- lastStringBoundary = byteCounter;
- ttfGen.startString();
- ttfGen.streamBytes(glyphData, offset, size);
- }
- byteCounter += size;
- }
-
- public void endGlyphStream() throws IOException {
- ttfGen.endString();
- }
-
- }
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