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Diffstat (limited to 'src/java/org/apache/fop/render/afp/modca/ImageSegment.java')
| -rw-r--r-- | src/java/org/apache/fop/render/afp/modca/ImageSegment.java | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/src/java/org/apache/fop/render/afp/modca/ImageSegment.java b/src/java/org/apache/fop/render/afp/modca/ImageSegment.java new file mode 100644 index 000000000..9a27b79f7 --- /dev/null +++ b/src/java/org/apache/fop/render/afp/modca/ImageSegment.java @@ -0,0 +1,225 @@ +/* + * Copyright 2006 The Apache Software Foundation. + * + * Licensed 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.afp.modca; +import java.io.IOException; +import java.io.OutputStream; +import java.io.UnsupportedEncodingException; + +/** + * An Image Segment is represented by a set of self-defining fields, fields + * that describe their own contents. It starts with a Begin Segment, and + * ends with an End Segment. + * + * Between the Begin Segment and End Segment is the image information to + * be processed, called the Image Content. + * + * Only one Image Content can exist within a single IOCA Image Segment. + */ +public class ImageSegment extends AbstractAFPObject { + + /** + * Default name for the object environment group + */ + private static final String DEFAULT_NAME = "IS01"; + + /** + * The name of the image segment + */ + private String _name; + + /** + * The name of the image segment as EBCIDIC bytes + */ + private byte[] _nameBytes; + + /** + * The ImageContent for the image segment + */ + private ImageContent _imageContent = null; + + /** + * Default constructor for the ImageSegment. + */ + public ImageSegment() { + + this(DEFAULT_NAME); + + } + + /** + * Constructor for the image segment with the specified name, + * the name must be a fixed length of eight characters. + * @param name The name of the image. + */ + public ImageSegment(String name) { + + if (name.length() != 4) { + String msg = "Image segment name must be 4 characters long " + name; + log.error("Constructor:: " + msg); + throw new IllegalArgumentException(msg); + } + + _name = name; + + try { + + _nameBytes = name.getBytes(AFPConstants.EBCIDIC_ENCODING); + + } catch (UnsupportedEncodingException usee) { + + _nameBytes = name.getBytes(); + log.warn( + "Constructor:: UnsupportedEncodingException translating the name " + + name); + + } + + } + + /** + * Sets the image size parameters + * resolution, hsize and vsize. + * @param hresol The horizontal resolution of the image. + * @param vresol The vertical resolution of the image. + * @param hsize The horizontal size of the image. + * @param vsize The vertival size of the image. + */ + public void setImageSize(int hresol, int vresol, int hsize, int vsize) { + if (_imageContent == null) { + _imageContent = new ImageContent(); + } + _imageContent.setImageSize(hresol, vresol, hsize, vsize); + } + + /** + * Sets the image encoding. + * @param encoding The image encoding. + */ + public void setImageEncoding(byte encoding) { + if (_imageContent == null) { + _imageContent = new ImageContent(); + } + _imageContent.setImageEncoding(encoding); + } + + /** + * Sets the image compression. + * @param compression The image compression. + */ + public void setImageCompression(byte compression) { + if (_imageContent == null) { + _imageContent = new ImageContent(); + } + _imageContent.setImageCompression(compression); + } + + /** + * Sets the image IDE size. + * @param size The IDE size. + */ + public void setImageIDESize(byte size) { + if (_imageContent == null) { + _imageContent = new ImageContent(); + } + _imageContent.setImageIDESize(size); + } + + /** + * Sets the image IDE color model. + * @param size The IDE color model. + */ + public void setImageIDEColorModel(byte colorModel) { + if (_imageContent == null) { + _imageContent = new ImageContent(); + } + _imageContent.setImageIDEColorModel(colorModel); + } + + /** + * Set the data of the image. + * @param data the image data + */ + public void setImageData(byte data[]) { + if (_imageContent == null) { + _imageContent = new ImageContent(); + } + _imageContent.setImageData(data); + } + + /** + * Accessor method to write the AFP datastream for the Image Segment + * @param os The stream to write to + * @throws java.io.IOException + */ + public void writeDataStream(OutputStream os) + throws IOException { + + writeStart(os); + + if (_imageContent != null) { + _imageContent.writeDataStream(os); + } + + writeEnd(os); + + } + + /** + * Helper method to write the start of the Image Segment. + * @param os The stream to write to + */ + private void writeStart(OutputStream os) + throws IOException { + + byte[] data = new byte[] { + 0x70, // ID + 0x04, // Length + 0x00, // Name byte 1 + 0x00, // Name byte 2 + 0x00, // Name byte 3 + 0x00, // Name byte 4 + }; + + for (int i = 0; i < _nameBytes.length; i++) { + + data[2 + i] = _nameBytes[i]; + + } + + os.write(data); + + } + + /** + * Helper method to write the end of the Image Segment. + * @param os The stream to write to + */ + private void writeEnd(OutputStream os) + throws IOException { + + byte[] data = new byte[] { + 0x71, // ID + 0x00, // Length + }; + + os.write(data); + + } + +} |