Bug 54542 - Add support for cropped images in XSLFPictureShape.drawContent()

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1634410 13f79535-47bb-0310-9956-ffa450edef68

src/ooxml/java/org/apache/poi/xslf/usermodel/XSLFImageRenderer.java

@@ -19,16 +19,19 @@
 
 package org.apache.poi.xslf.usermodel;
 
-import org.apache.poi.openxml4j.opc.PackagePart;
-import org.apache.poi.util.Beta;
-
-import javax.imageio.ImageIO;
 import java.awt.Graphics2D;
+import java.awt.Insets;
+import java.awt.Shape;
 import java.awt.geom.AffineTransform;
 import java.awt.geom.Rectangle2D;
 import java.awt.image.BufferedImage;
 import java.io.IOException;
 
+import javax.imageio.ImageIO;
+
+import org.apache.poi.openxml4j.opc.PackagePart;
+import org.apache.poi.util.Beta;
+
 /**
  * For now this class renders only images supported by the javax.imageio.ImageIO
  * framework. Subclasses can override this class to support other formats, for
@@ -72,17 +75,52 @@ public class XSLFImageRenderer {
 	 * 
 	 * @return true if the picture data was successfully rendered
 	 */
-	public boolean drawImage(Graphics2D graphics, XSLFPictureData data,
+    public boolean drawImage(Graphics2D graphics, XSLFPictureData data,
-			Rectangle2D anchor) {
+            Rectangle2D anchor) {
+        return drawImage(graphics, data, anchor, null);
+    }
+    
+    /**
+     * Render picture data into the supplied graphics
+     * 
+     * @return true if the picture data was successfully rendered
+     */
+    public boolean drawImage(Graphics2D graphics, XSLFPictureData data,
+			Rectangle2D anchor, Insets clip) {
+        boolean isClipped = true;
+        if (clip == null) {
+            isClipped = false;
+            clip = new Insets(0,0,0,0);
+        }
+        
 		try {
 			BufferedImage img = ImageIO.read(data.getPackagePart().getInputStream());
-            double sx = anchor.getWidth()/img.getWidth();
+			int iw = img.getWidth();
-            double sy = anchor.getHeight()/img.getHeight();
+			int ih = img.getHeight();
-            double tx = anchor.getX();
+
-            double ty = anchor.getY();
+            double aw = anchor.getWidth();
+            double ah = anchor.getHeight();
+            double ax = anchor.getX();
+            double ay = anchor.getY();
+            
+            double cw = (100000-clip.left-clip.right) / 100000.0;
+            double ch = (100000-clip.top-clip.bottom) / 100000.0;
+            double sx = aw/(iw*cw);
+            double sy = ah/(ih*ch);
+            double tx = anchor.getX()-(iw*sx*clip.left/100000.0);
+            double ty = anchor.getY()-(ih*sy*clip.top/100000.0);
             AffineTransform at = new AffineTransform(sx, 0, 0, sy, tx, ty) ;
 
-            graphics.drawRenderedImage(img, at);
+            if (isClipped) {
+                Shape clipOld = graphics.getClip();
+                AffineTransform atClip = new AffineTransform(aw, 0, 0, ah, ax, ay);
+                Shape clipNew = atClip.createTransformedShape(new Rectangle2D.Double(0, 0, 1, 1));
+                graphics.setClip(clipNew);
+                graphics.drawRenderedImage(img, at);
+                graphics.setClip(clipOld);
+            } else {
+                graphics.drawRenderedImage(img, at);
+            }
 
 			return true;
 		} catch (Exception e) {

src/ooxml/java/org/apache/poi/xslf/usermodel/XSLFPictureShape.java

@@ -20,6 +20,7 @@
 package org.apache.poi.xslf.usermodel;
 
 import java.awt.Graphics2D;
+import java.awt.Insets;
 import java.awt.geom.Rectangle2D;
 import java.awt.image.BufferedImage;
 import java.io.ByteArrayInputStream;
@@ -40,6 +41,7 @@ import org.openxmlformats.schemas.drawingml.x2006.main.CTNonVisualDrawingProps;
 import org.openxmlformats.schemas.drawingml.x2006.main.CTOfficeArtExtension;
 import org.openxmlformats.schemas.drawingml.x2006.main.CTOfficeArtExtensionList;
 import org.openxmlformats.schemas.drawingml.x2006.main.CTPresetGeometry2D;
+import org.openxmlformats.schemas.drawingml.x2006.main.CTRelativeRect;
 import org.openxmlformats.schemas.drawingml.x2006.main.CTShapeProperties;
 import org.openxmlformats.schemas.drawingml.x2006.main.STShapeType;
 import org.openxmlformats.schemas.presentationml.x2006.main.CTApplicationNonVisualDrawingProps;
@@ -177,6 +179,12 @@ public class XSLFPictureShape extends XSLFSimpleShape {
         return id;
     }
 
+    public Insets getBlipClip(){
+        CTPicture ct = (CTPicture)getXmlObject();
+        CTRelativeRect r = ct.getBlipFill().getSrcRect();
+        return (r == null) ? null : new Insets(r.getT(), r.getL(), r.getB(), r.getR());
+    }
+
     @Override
     public void drawContent(Graphics2D graphics) {
 
@@ -188,8 +196,10 @@ public class XSLFPictureShape extends XSLFSimpleShape {
 
         RenderableShape rShape = new RenderableShape(this);
         Rectangle2D anchor = rShape.getAnchor(graphics);
+        
+        Insets insets = getBlipClip();
 
-        renderer.drawImage(graphics, data, anchor);
+        renderer.drawImage(graphics, data, anchor, insets);
     }
 
 

src/ooxml/testcases/org/apache/poi/xslf/TestXSLFBugs.java

@@ -16,10 +16,24 @@
 ==================================================================== */
 package org.apache.poi.xslf;
 
+import static junit.framework.TestCase.assertEquals;
+import static org.apache.poi.POITestCase.assertContains;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.fail;
+
+import java.awt.Color;
+import java.awt.Dimension;
+import java.awt.Graphics2D;
+import java.awt.RenderingHints;
+import java.awt.geom.AffineTransform;
+import java.awt.geom.Rectangle2D;
+import java.awt.image.BufferedImage;
+import java.io.File;
 import java.net.URI;
 import java.util.List;
 
-import org.apache.poi.POITestCase;
+import javax.imageio.ImageIO;
+
 import org.apache.poi.POIXMLDocumentPart;
 import org.apache.poi.openxml4j.opc.PackagePart;
 import org.apache.poi.xslf.usermodel.DrawingParagraph;
@@ -31,11 +45,14 @@ import org.apache.poi.xslf.usermodel.XSLFRelation;
 import org.apache.poi.xslf.usermodel.XSLFShape;
 import org.apache.poi.xslf.usermodel.XSLFSlide;
 import org.apache.poi.xslf.usermodel.XSLFSlideLayout;
+import org.junit.Ignore;
+import org.junit.Test;
 
-public class TestXSLFBugs extends POITestCase {
+public class TestXSLFBugs {
 
+    @Test
     @SuppressWarnings("deprecation")
-    public void test51187() throws Exception {
+    public void bug51187() throws Exception {
        XMLSlideShow ss = XSLFTestDataSamples.openSampleDocument("51187.pptx");
        
        assertEquals(1, ss.getSlides().length);
@@ -70,7 +87,8 @@ public class TestXSLFBugs extends POITestCase {
     /**
      * Slide relations with anchors in them
      */
-    public void testTIKA705() {
+    @Test
+    public void tika705() {
        XMLSlideShow ss = XSLFTestDataSamples.openSampleDocument("with_japanese.pptx");
        
        // Should have one slide
@@ -117,7 +135,9 @@ public class TestXSLFBugs extends POITestCase {
      *  slide, eg presentation.xml rID1 -> slide1.xml, but slide1.xml 
      *  rID2 -> slide3.xml
      */
-    public void DISABLEDtest54916() throws Exception {
+    @Test
+    @Ignore
+    public void bug54916() throws Exception {
         XMLSlideShow ss = XSLFTestDataSamples.openSampleDocument("OverlappingRelations.pptx");
         XSLFSlide slide; 
         
@@ -144,7 +164,8 @@ public class TestXSLFBugs extends POITestCase {
      * there is no data available and XSLFPictureShape.getPictureData()
      * gives a NPE, see bug #56812
      */
-    public void test56812() throws Exception {
+    @Test
+    public void bug56812() throws Exception {
         XMLSlideShow ppt = XSLFTestDataSamples.openSampleDocument("56812.pptx");
         
         int internalPictures = 0;
@@ -173,6 +194,34 @@ public class TestXSLFBugs extends POITestCase {
         assertEquals(2, internalPictures);
         assertEquals(1, externalPictures);
     }
+
+    @Test
+    @Ignore("Similar to TestFontRendering it doesn't make sense to compare images because of tiny rendering differences in windows/unix")
+    public void bug54542() throws Exception {
+        XMLSlideShow ss = XSLFTestDataSamples.openSampleDocument("54542_cropped_bitmap.pptx");
+        
+        Dimension pgsize = ss.getPageSize();
+        
+        XSLFSlide slide = ss.getSlides()[0];
+        
+        // render it
+        double zoom = 1;
+        AffineTransform at = new AffineTransform();
+        at.setToScale(zoom, zoom);
+        
+        BufferedImage imgActual = new BufferedImage((int)Math.ceil(pgsize.width*zoom), (int)Math.ceil(pgsize.height*zoom), BufferedImage.TYPE_3BYTE_BGR);
+        Graphics2D graphics = imgActual.createGraphics();
+        graphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
+        graphics.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
+        graphics.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
+        graphics.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);
+        graphics.setTransform(at);                
+        graphics.setPaint(Color.white);
+        graphics.fill(new Rectangle2D.Float(0, 0, pgsize.width, pgsize.height));
+        slide.draw(graphics);             
+        
+        ImageIO.write(imgActual, "PNG", new File("bug54542.png"));
+    }
     
     protected String getSlideText(XSLFSlide slide) {
         StringBuffer text = new StringBuffer();