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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.afp.modca;
-
- import java.io.IOException;
- import java.io.OutputStream;
-
- import org.apache.fop.render.afp.ioca.ImageCellPosition;
- import org.apache.fop.render.afp.ioca.ImageInputDescriptor;
- import org.apache.fop.render.afp.ioca.ImageOutputControl;
- import org.apache.fop.render.afp.ioca.ImageRasterData;
- import org.apache.fop.render.afp.ioca.ImageRasterPattern;
-
- /**
- * Pages contain the data objects that comprise a presentation document. Each
- * page has a set of data objects associated with it. Each page within a
- * document is independent from any other page, and each must establish its own
- * environment parameters.
- *
- * The page is the level in the document component hierarchy that is used for
- * printing or displaying a document's content. The data objects contained in
- * the page envelope in the data stream are presented when the page is
- * presented. Each data object has layout information associated with it that
- * directs the placement and orientation of the data on the page. In addition,
- * each page contains layout information that specifies the measurement units,
- * page width, and page depth.
- *
- * A page is initiated by a begin page structured field and terminated by an end
- * page structured field. Structured fields that define objects and active
- * environment groups or that specify attributes of the page may be encountered
- * in page state.
- *
- */
- public class PageObject extends AbstractResourceGroupContainer {
-
- /**
- * Construct a new page object for the specified name argument, the page
- * name should be an 8 character identifier.
- *
- * @param factory the resource manager
- *
- * @param name
- * the name of the page.
- * @param width
- * the width of the page.
- * @param height
- * the height of the page.
- * @param rotation
- * the rotation of the page.
- * @param widthRes
- * the width resolution of the page.
- * @param heightRes
- * the height resolution of the page.
- */
- public PageObject(Factory factory,
- String name, int width, int height, int rotation,
- int widthRes, int heightRes) {
- super(factory, name, width, height, rotation, widthRes, heightRes);
- }
-
- /**
- * Creates an IncludePageOverlay on the page.
- *
- * @param name
- * the name of the overlay
- * @param x
- * the x position of the overlay
- * @param y
- * the y position of the overlay
- * @param orientation
- * the orientation required for the overlay
- */
- public void createIncludePageOverlay(String name, int x, int y, int orientation) {
- getActiveEnvironmentGroup().createOverlay(name);
- IncludePageOverlay ipo = new IncludePageOverlay(name, x, y, orientation);
- addObject(ipo);
- }
-
- /**
- * This method will create shading on the page using the specified
- * coordinates (the shading contrast is controlled via the red, green blue
- * parameters, by converting this to grayscale).
- *
- * @param x
- * the x coordinate of the shading
- * @param y
- * the y coordinate of the shading
- * @param w
- * the width of the shaded area
- * @param h
- * the height of the shaded area
- * @param red
- * the red value
- * @param green
- * the green value
- * @param blue
- * the blue value
- */
- public void createShading(int x, int y, int w, int h, int red, int green, int blue) {
- int xCoord = 0;
- int yCoord = 0;
- int areaWidth = 0;
- int areaHeight = 0;
- switch (rotation) {
- case 90:
- xCoord = areaWidth - y - h;
- yCoord = x;
- areaWidth = h;
- areaHeight = w;
- break;
- case 180:
- xCoord = areaWidth - x - w;
- yCoord = areaHeight - y - h;
- areaWidth = w;
- areaHeight = h;
- break;
- case 270:
- xCoord = y;
- yCoord = areaHeight - x - w;
- areaWidth = h;
- areaHeight = w;
- break;
- default:
- xCoord = x;
- yCoord = y;
- areaWidth = w;
- areaHeight = h;
- break;
- }
-
- // Convert the color to grey scale
- float shade = (float) ((red * 0.3) + (green * 0.59) + (blue * 0.11));
-
- int grayscale = Math.round((shade / 255) * 16);
-
- IMImageObject imImageObject = factory.createIMImageObject();
-
- ImageOutputControl imageOutputControl = new ImageOutputControl(0, 0);
- ImageInputDescriptor imageInputDescriptor = new ImageInputDescriptor();
- ImageCellPosition imageCellPosition = new ImageCellPosition(xCoord, yCoord);
- imageCellPosition.setXFillSize(areaWidth);
- imageCellPosition.setYFillSize(areaHeight);
- imageCellPosition.setXSize(64);
- imageCellPosition.setYSize(8);
-
- //defining this as a resource
- byte[] rasterData = ImageRasterPattern.getRasterData(grayscale);
- ImageRasterData imageRasterData = factory.createImageRasterData(rasterData);
-
- imImageObject.setImageOutputControl(imageOutputControl);
- imImageObject.setImageInputDescriptor(imageInputDescriptor);
- imImageObject.setImageCellPosition(imageCellPosition);
- imImageObject.setImageRasterData(imageRasterData);
- addObject(imImageObject);
- }
-
- /** {@inheritDoc} */
- protected void writeStart(OutputStream os) throws IOException {
- byte[] data = new byte[17];
- copySF(data, Type.BEGIN, Category.PAGE);
- os.write(data);
- }
-
- /** {@inheritDoc} */
- protected void writeContent(OutputStream os) throws IOException {
- super.writeContent(os);
-
- getActiveEnvironmentGroup().writeToStream(os);
-
- writeObjects(includePageSegments, os);
- writeObjects(tagLogicalElements, os);
- writeObjects(objects, os);
- }
-
- /** {@inheritDoc} */
- protected void writeEnd(OutputStream os) throws IOException {
- byte[] data = new byte[17];
- copySF(data, Type.END, Category.PAGE);
- os.write(data);
- }
-
- /**
- * Adds an AFP object reference to this page
- *
- * @param obj an AFP object
- */
- public void addObject(Object obj) {
- endPresentationObject();
- super.addObject(obj);
- }
-
- /** {@inheritDoc} */
- public String toString() {
- return this.getName();
- }
-
- /** {@inheritDoc} */
- protected boolean canWrite(AbstractAFPObject ao) {
- return true;
- }
- }
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