Add a consumer class not to have to rewrite it in each image implementing class

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@193389 13f79535-47bb-0310-9956-ffa450edef68

diff --git a/src/org/apache/fop/image/FopImageConsumer.java b/src/org/apache/fop/image/FopImageConsumer.java
new file mode 100644 (file)
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+++ b/src/org/apache/fop/image/FopImageConsumer.java
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+/*
+
+ ============================================================================
+                   The Apache Software License, Version 1.1
+ ============================================================================
+ 
+    Copyright (C) 1999 The Apache Software Foundation. All rights reserved.
+ 
+ Redistribution and use in source and binary forms, with or without modifica-
+ tion, are permitted provided that the following conditions are met:
+ 
+ 1. Redistributions of  source code must  retain the above copyright  notice,
+    this list of conditions and the following disclaimer.
+ 
+ 2. Redistributions in binary form must reproduce the above copyright notice,
+    this list of conditions and the following disclaimer in the documentation
+    and/or other materials provided with the distribution.
+ 
+ 3. The end-user documentation included with the redistribution, if any, must
+    include  the following  acknowledgment:  "This product includes  software
+    developed  by the  Apache Software Foundation  (http://www.apache.org/)."
+    Alternately, this  acknowledgment may  appear in the software itself,  if
+    and wherever such third-party acknowledgments normally appear.
+ 
+ 4. The names "Fop" and  "Apache Software Foundation"  must not be used to
+    endorse  or promote  products derived  from this  software without  prior
+    written permission. For written permission, please contact
+    apache@apache.org.
+ 
+ 5. Products  derived from this software may not  be called "Apache", nor may
+    "Apache" appear  in their name,  without prior written permission  of the
+    Apache Software Foundation.
+ 
+ THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
+ INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ FITNESS  FOR A PARTICULAR  PURPOSE ARE  DISCLAIMED.  IN NO  EVENT SHALL  THE
+ APACHE SOFTWARE  FOUNDATION  OR ITS CONTRIBUTORS  BE LIABLE FOR  ANY DIRECT,
+ INDIRECT, INCIDENTAL, SPECIAL,  EXEMPLARY, OR CONSEQUENTIAL  DAMAGES (INCLU-
+ DING, BUT NOT LIMITED TO, PROCUREMENT  OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ OF USE, DATA, OR  PROFITS; OR BUSINESS  INTERRUPTION)  HOWEVER CAUSED AND ON
+ ANY  THEORY OF LIABILITY,  WHETHER  IN CONTRACT,  STRICT LIABILITY,  OR TORT
+ (INCLUDING  NEGLIGENCE OR  OTHERWISE) ARISING IN  ANY WAY OUT OF THE  USE OF
+ THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ 
+ This software  consists of voluntary contributions made  by many individuals
+ on  behalf of the Apache Software  Foundation and was  originally created by
+ James Tauber <jtauber@jtauber.com>. For more  information on the Apache 
+ Software Foundation, please see <http://www.apache.org/>.
+ 
+ */
+
+//Author:       Eric SCHAEFFER
+//Description:  implement ImageConsumer for FopImage classes
+
+package org.apache.fop.image;
+
+// Java
+import java.util.Hashtable;
+import java.awt.image.*;
+import java.awt.*;
+
+import java.lang.reflect.Array;
+
+// CONSUMER CLASS
+public class FopImageConsumer implements ImageConsumer {
+       protected int width = -1;
+       protected int height = -1;
+       protected Integer imageStatus = new Integer(-1);
+       protected int hints = 0;
+       protected Hashtable properties = null;
+       protected ColorModel cm = null;
+       protected ImageProducer ip = null;
+
+       public FopImageConsumer(ImageProducer iprod) {
+               this.ip = iprod;
+       }
+
+       public void imageComplete(int status) {
+/*
+System.err.print("Status ");
+if (status == ImageConsumer.COMPLETESCANLINES) {
+       System.err.println("CompleteScanLines");
+} else if (status == ImageConsumer.IMAGEABORTED) {
+       System.err.println("ImageAborted");
+} else if (status == ImageConsumer.IMAGEERROR) {
+       System.err.println("ImageError");
+} else if (status == ImageConsumer.RANDOMPIXELORDER) {
+       System.err.println("RandomPixelOrder");
+} else if (status == ImageConsumer.SINGLEFRAME) {
+       System.err.println("SingleFrame");
+} else if (status == ImageConsumer.SINGLEFRAMEDONE) {
+       System.err.println("SingleFrameDone");
+} else if (status == ImageConsumer.SINGLEPASS) {
+       System.err.println("SinglePass");
+} else if (status == ImageConsumer.STATICIMAGEDONE) {
+       System.err.println("StaticImageDone");
+} else if (status == ImageConsumer.TOPDOWNLEFTRIGHT) {
+       System.err.println("TopDownLeftRight");
+}
+*/
+               synchronized(this.imageStatus) {
+                       // Need to stop status if image done
+                       if (this.imageStatus.intValue() != ImageConsumer.STATICIMAGEDONE)
+                               this.imageStatus = new Integer(status);
+               }
+       }
+
+       public void setColorModel(ColorModel model) {
+//System.err.println("setColorModel: " + model);
+               this.cm = model;
+       }
+
+       public void setDimensions(int width, int height) {
+//System.err.println("setDimension: w=" + width + " h=" + height);
+               this.width = width;
+               this.height = height;
+       }
+
+       public void setHints(int hintflags) {
+//System.err.println("setHints: " + hintflags);
+               this.hints = hintflags;
+       }
+
+       public void setProperties(Hashtable props) {
+//System.err.println("setProperties: " + props);
+               this.properties = props;
+       }
+
+       public void setPixels(int x, int y, int w, int h,
+          ColorModel model, byte[] pixels,int off,
+          int scansize) {}
+
+       public void setPixels(int x, int y, int w, int h,
+          ColorModel model, int[] pixels, int off,
+          int scansize) {}
+
+       public boolean isImageReady() throws Exception {
+               synchronized(this.imageStatus) {
+                       if (this.imageStatus.intValue() == ImageConsumer.IMAGEABORTED)
+                               throw new Exception("Image aborted");
+                       if (this.imageStatus.intValue() == ImageConsumer.IMAGEERROR)
+                               throw new Exception("Image error");
+
+                       if (this.imageStatus.intValue() == ImageConsumer.STATICIMAGEDONE)
+                               return true;
+
+                       return false;
+               }
+       }
+
+       public int getWidth() {
+               return this.width;
+       }
+
+       public int getHeight() {
+               return this.height;
+       }
+
+       public ColorModel getColorModel() {
+               return this.cm;
+       }
+
+       public int[] getImage() throws Exception {
+               int tmpMap[] = new int[this.width * this.height];
+               PixelGrabber pg = new PixelGrabber(
+                                                                       this.ip,
+                                                                       0, 0,
+                                                                       this.width, this.height,
+                                                                       tmpMap,
+                                                                       0, this.width
+                                                                       );
+               pg.setDimensions(this.width, this.height);
+               pg.setColorModel(this.cm);
+               pg.setHints(this.hints);
+               pg.setProperties(this.properties);
+               try {
+                       pg.grabPixels();
+               } catch (InterruptedException intex) {
+                       throw new Exception("Image grabbing interrupted : " + intex.getMessage());
+               }
+               return tmpMap;
+       }
+}