src/java/org/apache/poi/sl/draw/DrawPictureShape.java - poi - Git at Google

 /* ====================================================================
    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.
 ==================================================================== */

 package org.apache.poi.sl.draw;

 import java.awt.Dimension;
 import java.awt.Graphics2D;
 import java.awt.Insets;
 import java.awt.Paint;
 import java.awt.geom.Rectangle2D;
 import java.io.IOException;

 import org.apache.poi.sl.usermodel.PictureData;
 import org.apache.poi.sl.usermodel.PictureShape;
 import org.apache.poi.sl.usermodel.RectAlign;
 import org.apache.poi.util.POILogFactory;
 import org.apache.poi.util.POILogger;


 public class DrawPictureShape extends DrawSimpleShape {
     private static final POILogger LOG = POILogFactory.getLogger(DrawPictureShape.class);
     private static final String[] KNOWN_RENDERER = {
         "org.apache.poi.hwmf.draw.HwmfImageRenderer",
         "org.apache.poi.hemf.draw.HemfImageRenderer",
         "org.apache.poi.xslf.draw.SVGImageRenderer"
     };

     public DrawPictureShape(PictureShape<?,?> shape) {
         super(shape);
     }

     @Override
     public void drawContent(Graphics2D graphics) {
         PictureShape<?,?> ps = getShape();

         Rectangle2D anchor = getAnchor(graphics, ps);
         Insets insets = ps.getClipping();

         PictureData[] pics = { ps.getAlternativePictureData(), ps.getPictureData() };
         for (PictureData data : pics) {
             if (data == null) {
                 continue;
             }

             try {
                 String ct = data.getContentType();
                 ImageRenderer renderer = getImageRenderer(graphics, ct);
                 if (renderer.canRender(ct)) {
                     renderer.loadImage(data.getData(), ct);
                     renderer.drawImage(graphics, anchor, insets);
                     return;
                 }
             } catch (IOException e) {
                 LOG.log(POILogger.ERROR, "image can't be loaded/rendered.", e);
             }
         }
     }

     /**
      * Returns an ImageRenderer for the PictureData
      *
      * @param graphics the graphics context
      * @return the image renderer
      */
     @SuppressWarnings({"WeakerAccess", "unchecked"})
     public static ImageRenderer getImageRenderer(Graphics2D graphics, String contentType) {
         final ImageRenderer renderer = (ImageRenderer)graphics.getRenderingHint(Drawable.IMAGE_RENDERER);
         if (renderer != null && renderer.canRender(contentType)) {
             return renderer;
         }

         // first try with our default image renderer
         final BitmapImageRenderer bir = new BitmapImageRenderer();
         if (bir.canRender(contentType)) {
             return bir;
         }

         // then iterate through the scratchpad renderers
         //
         // this could be nicely implemented via a j.u.ServiceLoader, but OSGi makes things complicated ...
         // https://blog.osgi.org/2013/02/javautilserviceloader-in-osgi.html
         // ... therefore falling back to classloading attempts
         ClassLoader cl = ImageRenderer.class.getClassLoader();
         for (String kr : KNOWN_RENDERER) {
             final ImageRenderer ir;
             try {
                 ir = ((Class<? extends ImageRenderer>)cl.loadClass(kr)).newInstance();
             } catch (ClassNotFoundException | InstantiationException | IllegalAccessException e) {
                 // scratchpad was not on the path, ignore and continue
                 LOG.log(POILogger.INFO, "Known image renderer '"+kr+" not found/loaded - include poi-scratchpad jar!", e);
                 continue;
             }
             if (ir.canRender(contentType)) {
                 return ir;
             }
         }

         LOG.log(POILogger.WARN, "No suiteable image renderer found for content-type '"+
                 contentType+"' - include poi-scratchpad jar!");

         // falling back to BitmapImageRenderer, at least it gracefully handles invalid images
         return bir;
     }

     @Override
     protected Paint getFillPaint(Graphics2D graphics) {
         return null;
     }

     @Override
     protected PictureShape<?,?> getShape() {
         return (PictureShape<?,?>)shape;
     }

     /**
      * Resize this picture to the default size.
      *
      * For PNG and JPEG resizes the image to 100%,
      * for other types, if the size can't be determined it will be 200x200 pixels.
      */
     public void resize() {
         PictureShape<?,?> ps = getShape();
         Dimension dim = ps.getPictureData().getImageDimension();

         Rectangle2D origRect = ps.getAnchor();
         double x = origRect.getX();
         double y = origRect.getY();
         double w = dim.getWidth();
         double h = dim.getHeight();
         ps.setAnchor(new Rectangle2D.Double(x, y, w, h));
     }


     /**
      * Fit picture shape into the target rectangle, maintaining the aspect ratio
      * and repositioning within the target rectangle with a centered alignment.
      *
      * @param target    The target rectangle
      */
     public void resize(Rectangle2D target) {
         resize(target, RectAlign.CENTER);
     }


     /**
      * Fit picture shape into the target rectangle, maintaining the aspect ratio
      * and repositioning within the target rectangle based on the specified
      * alignment (gravity).
      *
      * @param target    The target rectangle
      * @param align
      *            The alignment within the target rectangle when resizing.
      *            A null value corresponds to RectAlign.CENTER
      */
     public void resize(Rectangle2D target, RectAlign align) {
         PictureShape<?,?> ps = getShape();
         Dimension dim = ps.getPictureData().getImageDimension();
         if (dim.width <= 0 || dim.height <= 0) {
             // nothing useful to be done for this case
             ps.setAnchor(target);
             return;
         }

         double w = target.getWidth();
         double h = target.getHeight();

         // scaling
         double sx = w / dim.width;
         double sy = h / dim.height;

         // position adjustments
         double dx = 0, dy = 0;

         if (sx > sy) {
             // use y-scaling for both, reposition x accordingly
             w  = sy * dim.width;
             dx = target.getWidth() - w;
         } else if (sy > sx) {
             // use x-scaling for both, reposition y accordingly
             h  = sx * dim.height;
             dy = target.getHeight() - h;
         } else {
             // uniform scaling, can use target values directly
             ps.setAnchor(target);
             return;
         }

         // the positioning
         double x = target.getX();
         double y = target.getY();
         switch (align) {
             case TOP:           // X=balance, Y=ok
                 x += dx/2;
                 break;
             case TOP_RIGHT:     // X=shift, Y=ok
                 x += dx;
                 break;
             case RIGHT:         // X=shift, Y=balance
                 x += dx;
                 y += dy/2;
                 break;
             case BOTTOM_RIGHT:  // X=shift, Y=shift
                 x += dx;
                 y += dy;
                 break;
             case BOTTOM:        // X=balance, Y=shift
                 x += dx/2;
                 y += dy;
                 break;
             case BOTTOM_LEFT:   // X=ok, Y=shift
                 y += dy;
                 break;
             case LEFT:          // X=ok, Y=balance
                 y += dy/2;
                 break;
             case TOP_LEFT:      // X=ok, Y=ok
                 /* no-op */
                 break;
             default:            // CENTER: X=balance, Y=balance
                 x += dx/2;
                 y += dy/2;
                 break;
         }

         ps.setAnchor(new Rectangle2D.Double(x, y, w, h));
     }
 }
	/* ====================================================================
	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.
	==================================================================== */

	package org.apache.poi.sl.draw;

	import java.awt.Dimension;
	import java.awt.Graphics2D;
	import java.awt.Insets;
	import java.awt.Paint;
	import java.awt.geom.Rectangle2D;
	import java.io.IOException;

	import org.apache.poi.sl.usermodel.PictureData;
	import org.apache.poi.sl.usermodel.PictureShape;
	import org.apache.poi.sl.usermodel.RectAlign;
	import org.apache.poi.util.POILogFactory;
	import org.apache.poi.util.POILogger;


	public class DrawPictureShape extends DrawSimpleShape {
	private static final POILogger LOG = POILogFactory.getLogger(DrawPictureShape.class);
	private static final String[] KNOWN_RENDERER = {
	"org.apache.poi.hwmf.draw.HwmfImageRenderer",
	"org.apache.poi.hemf.draw.HemfImageRenderer",
	"org.apache.poi.xslf.draw.SVGImageRenderer"
	};

	public DrawPictureShape(PictureShape<?,?> shape) {
	super(shape);
	}

	@Override
	public void drawContent(Graphics2D graphics) {
	PictureShape<?,?> ps = getShape();

	Rectangle2D anchor = getAnchor(graphics, ps);
	Insets insets = ps.getClipping();

	PictureData[] pics = { ps.getAlternativePictureData(), ps.getPictureData() };
	for (PictureData data : pics) {
	if (data == null) {
	continue;
	}

	try {
	String ct = data.getContentType();
	ImageRenderer renderer = getImageRenderer(graphics, ct);
	if (renderer.canRender(ct)) {
	renderer.loadImage(data.getData(), ct);
	renderer.drawImage(graphics, anchor, insets);
	return;
	}
	} catch (IOException e) {
	LOG.log(POILogger.ERROR, "image can't be loaded/rendered.", e);
	}
	}
	}

	/**
	* Returns an ImageRenderer for the PictureData
	*
	* @param graphics the graphics context
	* @return the image renderer
	*/
	@SuppressWarnings({"WeakerAccess", "unchecked"})
	public static ImageRenderer getImageRenderer(Graphics2D graphics, String contentType) {
	final ImageRenderer renderer = (ImageRenderer)graphics.getRenderingHint(Drawable.IMAGE_RENDERER);
	if (renderer != null && renderer.canRender(contentType)) {
	return renderer;
	}

	// first try with our default image renderer
	final BitmapImageRenderer bir = new BitmapImageRenderer();
	if (bir.canRender(contentType)) {
	return bir;
	}

	// then iterate through the scratchpad renderers
	//
	// this could be nicely implemented via a j.u.ServiceLoader, but OSGi makes things complicated ...
	// https://blog.osgi.org/2013/02/javautilserviceloader-in-osgi.html
	// ... therefore falling back to classloading attempts
	ClassLoader cl = ImageRenderer.class.getClassLoader();
	for (String kr : KNOWN_RENDERER) {
	final ImageRenderer ir;
	try {
	ir = ((Class<? extends ImageRenderer>)cl.loadClass(kr)).newInstance();
	} catch (ClassNotFoundException \| InstantiationException \| IllegalAccessException e) {
	// scratchpad was not on the path, ignore and continue
	LOG.log(POILogger.INFO, "Known image renderer '"+kr+" not found/loaded - include poi-scratchpad jar!", e);
	continue;
	}
	if (ir.canRender(contentType)) {
	return ir;
	}
	}

	LOG.log(POILogger.WARN, "No suiteable image renderer found for content-type '"+
	contentType+"' - include poi-scratchpad jar!");

	// falling back to BitmapImageRenderer, at least it gracefully handles invalid images
	return bir;
	}

	@Override
	protected Paint getFillPaint(Graphics2D graphics) {
	return null;
	}

	@Override
	protected PictureShape<?,?> getShape() {
	return (PictureShape<?,?>)shape;
	}

	/**
	* Resize this picture to the default size.
	*
	* For PNG and JPEG resizes the image to 100%,
	* for other types, if the size can't be determined it will be 200x200 pixels.
	*/
	public void resize() {
	PictureShape<?,?> ps = getShape();
	Dimension dim = ps.getPictureData().getImageDimension();

	Rectangle2D origRect = ps.getAnchor();
	double x = origRect.getX();
	double y = origRect.getY();
	double w = dim.getWidth();
	double h = dim.getHeight();
	ps.setAnchor(new Rectangle2D.Double(x, y, w, h));
	}


	/**
	* Fit picture shape into the target rectangle, maintaining the aspect ratio
	* and repositioning within the target rectangle with a centered alignment.
	*
	* @param target The target rectangle
	*/
	public void resize(Rectangle2D target) {
	resize(target, RectAlign.CENTER);
	}


	/**
	* Fit picture shape into the target rectangle, maintaining the aspect ratio
	* and repositioning within the target rectangle based on the specified
	* alignment (gravity).
	*
	* @param target The target rectangle
	* @param align
	* The alignment within the target rectangle when resizing.
	* A null value corresponds to RectAlign.CENTER
	*/
	public void resize(Rectangle2D target, RectAlign align) {
	PictureShape<?,?> ps = getShape();
	Dimension dim = ps.getPictureData().getImageDimension();
	if (dim.width <= 0 \|\| dim.height <= 0) {
	// nothing useful to be done for this case
	ps.setAnchor(target);
	return;
	}

	double w = target.getWidth();
	double h = target.getHeight();

	// scaling
	double sx = w / dim.width;
	double sy = h / dim.height;

	// position adjustments
	double dx = 0, dy = 0;

	if (sx > sy) {
	// use y-scaling for both, reposition x accordingly
	w = sy * dim.width;
	dx = target.getWidth() - w;
	} else if (sy > sx) {
	// use x-scaling for both, reposition y accordingly
	h = sx * dim.height;
	dy = target.getHeight() - h;
	} else {
	// uniform scaling, can use target values directly
	ps.setAnchor(target);
	return;
	}

	// the positioning
	double x = target.getX();
	double y = target.getY();
	switch (align) {
	case TOP: // X=balance, Y=ok
	x += dx/2;
	break;
	case TOP_RIGHT: // X=shift, Y=ok
	x += dx;
	break;
	case RIGHT: // X=shift, Y=balance
	x += dx;
	y += dy/2;
	break;
	case BOTTOM_RIGHT: // X=shift, Y=shift
	x += dx;
	y += dy;
	break;
	case BOTTOM: // X=balance, Y=shift
	x += dx/2;
	y += dy;
	break;
	case BOTTOM_LEFT: // X=ok, Y=shift
	y += dy;
	break;
	case LEFT: // X=ok, Y=balance
	y += dy/2;
	break;
	case TOP_LEFT: // X=ok, Y=ok
	/* no-op */
	break;
	default: // CENTER: X=balance, Y=balance
	x += dx/2;
	y += dy/2;
	break;
	}

	ps.setAnchor(new Rectangle2D.Double(x, y, w, h));
	}
	}