Bug 53191 - Problems with line style when converting ppt to png

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1765196 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/poi/sl/draw/DrawFreeformShape.java

@@ -18,6 +18,8 @@
 package org.apache.poi.sl.draw;
 
 import java.awt.Graphics2D;
+import java.awt.geom.AffineTransform;
+import java.awt.geom.Path2D;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
@@ -35,11 +37,20 @@ public class DrawFreeformShape extends DrawAutoShape {
 
     protected Collection<Outline> computeOutlines(Graphics2D graphics) {
         List<Outline> lst = new ArrayList<Outline>();
-        java.awt.Shape sh = getShape().getPath();
+        FreeformShape<?,?> fsh = getShape();
-        FillStyle fs = getShape().getFillStyle();
+        Path2D sh = fsh.getPath();
-        StrokeStyle ss = getShape().getStrokeStyle();
+
+        AffineTransform tx = (AffineTransform)graphics.getRenderingHint(Drawable.GROUP_TRANSFORM);
+        if (tx == null) {
+            tx = new AffineTransform();
+        }
+
+        java.awt.Shape canvasShape = tx.createTransformedShape(sh);
+
+        FillStyle fs = fsh.getFillStyle();
+        StrokeStyle ss = fsh.getStrokeStyle();
         Path path = new Path(fs != null, ss != null);
-        lst.add(new Outline(sh, path));
+        lst.add(new Outline(canvasShape, path));
         return lst;
     }
 

src/java/org/apache/poi/sl/draw/DrawShape.java

@@ -47,10 +47,31 @@ public class DrawShape implements Drawable {
         if (!(shape instanceof PlaceableShape)) return;
 
         PlaceableShape<?,?> ps = (PlaceableShape<?,?>)shape;
+        final boolean isHSLF = ps.getClass().getCanonicalName().toLowerCase(Locale.ROOT).contains("hslf");
         AffineTransform tx = (AffineTransform)graphics.getRenderingHint(Drawable.GROUP_TRANSFORM);
         if (tx == null) tx = new AffineTransform();
         final Rectangle2D anchor = tx.createTransformedShape(ps.getAnchor()).getBounds2D();
 
+        char cmds[] = isHSLF ? new char[]{ 'h','v','r' } : new char[]{ 'r','h','v' };
+        for (char ch : cmds) {
+            switch (ch) {
+            case 'h':
+                //flip horizontal
+                if (ps.getFlipHorizontal()) {
+                    graphics.translate(anchor.getX() + anchor.getWidth(), anchor.getY());
+                    graphics.scale(-1, 1);
+                    graphics.translate(-anchor.getX(), -anchor.getY());
+                }
+                break;
+            case 'v':
+                //flip vertical
+                if (ps.getFlipVertical()) {
+                    graphics.translate(anchor.getX(), anchor.getY() + anchor.getHeight());
+                    graphics.scale(1, -1);
+                    graphics.translate(-anchor.getX(), -anchor.getY());
+                }
+                break;
+            case 'r':
                 // rotation
                 double rotation = ps.getRotation();
                 if (rotation != 0.) {
@@ -77,7 +98,7 @@ public class DrawShape implements Drawable {
                         // and later on, turn it around again to compare it with its original size ...
 
                         AffineTransform txs;
-                if (ps.getClass().getCanonicalName().toLowerCase(Locale.ROOT).contains("hslf")) {
+                        if (isHSLF) {
                             txs = new AffineTransform(tx);
                         } else {
                             // this handling is only based on try and error ... not sure why xslf is handled differently.
@@ -113,19 +134,8 @@ public class DrawShape implements Drawable {
                     }
                     graphics.translate(-centerX, -centerY);
                 }
-
+                break;
-        //flip horizontal
-        if (ps.getFlipHorizontal()) {
-            graphics.translate(anchor.getX() + anchor.getWidth(), anchor.getY());
-            graphics.scale(-1, 1);
-            graphics.translate(-anchor.getX(), -anchor.getY());
             }
-
-        //flip vertical
-        if (ps.getFlipVertical()) {
-            graphics.translate(anchor.getX(), anchor.getY() + anchor.getHeight());
-            graphics.scale(1, -1);
-            graphics.translate(-anchor.getX(), -anchor.getY());
         }
     }
 

src/scratchpad/src/org/apache/poi/hslf/usermodel/HSLFFreeformShape.java

@@ -230,12 +230,12 @@ public final class HSLFFreeformShape extends HSLFAutoShape implements FreeformSh
         EscherArrayProperty verticesProp = new EscherArrayProperty((short)(EscherProperties.GEOMETRY__VERTICES + 0x4000), false, null);
         verticesProp.setNumberOfElementsInArray(pntInfo.size());
         verticesProp.setNumberOfElementsInMemory(pntInfo.size());
-        verticesProp.setSizeOfElements(0xFFF0);
+        verticesProp.setSizeOfElements(8);
         for (int i = 0; i < pntInfo.size(); i++) {
             Point2D.Double pnt = pntInfo.get(i);
-            byte[] data = new byte[4];
+            byte[] data = new byte[8];
-            LittleEndian.putShort(data, 0, (short)Units.pointsToMaster(pnt.getX() - bounds.getX()));
+            LittleEndian.putInt(data, 0, Units.pointsToMaster(pnt.getX() - bounds.getX()));
-            LittleEndian.putShort(data, 2, (short)Units.pointsToMaster(pnt.getY() - bounds.getY()));
+            LittleEndian.putInt(data, 4, Units.pointsToMaster(pnt.getY() - bounds.getY()));
             verticesProp.setElement(i, data);
         }
         opt.addEscherProperty(verticesProp);
@@ -282,6 +282,7 @@ public final class HSLFFreeformShape extends HSLFAutoShape implements FreeformSh
 
         Iterator<byte[]> vertIter = verticesProp.iterator();
         Iterator<byte[]> segIter = segmentsProp.iterator();
+        double xyPoints[] = new double[2];
         
         while (vertIter.hasNext() && segIter.hasNext()) {
             byte[] segElem = segIter.next();
@@ -292,30 +293,30 @@ public final class HSLFFreeformShape extends HSLFAutoShape implements FreeformSh
                     break;
                 }
                 case moveTo: {
-                    byte[] p = vertIter.next();
+                    fillPoint(vertIter.next(), xyPoints);
-                    double x = Units.masterToPoints(LittleEndian.getShort(p, 0));
+                    double x = xyPoints[0];
-                    double y = Units.masterToPoints(LittleEndian.getShort(p, 2));
+                    double y = xyPoints[1];
                     path.moveTo(x,y);
                     break;
                 }
                 case curveTo: {
-                    byte[] p1 = vertIter.next();
+                    fillPoint(vertIter.next(), xyPoints);
-                    double x1 = Units.masterToPoints(LittleEndian.getShort(p1, 0));
+                    double x1 = xyPoints[0];
-                    double y1 = Units.masterToPoints(LittleEndian.getShort(p1, 2));
+                    double y1 = xyPoints[1];
-                    byte[] p2 = vertIter.next();
+                    fillPoint(vertIter.next(), xyPoints);
-                    double x2 = Units.masterToPoints(LittleEndian.getShort(p2, 0));
+                    double x2 = xyPoints[0];
-                    double y2 = Units.masterToPoints(LittleEndian.getShort(p2, 2));
+                    double y2 = xyPoints[1];
-                    byte[] p3 = vertIter.next();
+                    fillPoint(vertIter.next(), xyPoints);
-                    double x3 = Units.masterToPoints(LittleEndian.getShort(p3, 0));
+                    double x3 = xyPoints[0];
-                    double y3 = Units.masterToPoints(LittleEndian.getShort(p3, 2));
+                    double y3 = xyPoints[1];
                     path.curveTo(x1,y1,x2,y2,x3,y3);
                     break;
                 }
                 case lineTo:
                     if (vertIter.hasNext()) {
-                        byte[] p = vertIter.next();
+                        fillPoint(vertIter.next(), xyPoints);
-                        double x = Units.masterToPoints(LittleEndian.getShort(p, 0));
+                        double x = xyPoints[0];
-                        double y = Units.masterToPoints(LittleEndian.getShort(p, 2));
+                        double y = xyPoints[1];
                         path.lineTo(x,y);
                     }
                     break;
@@ -344,6 +345,25 @@ public final class HSLFFreeformShape extends HSLFAutoShape implements FreeformSh
         return new Path2D.Double(at.createTransformedShape(path));
     }
     
+    private void fillPoint(byte xyMaster[], double xyPoints[]) {
+        if (xyMaster == null || xyPoints == null || (xyMaster.length != 4 && xyMaster.length != 8) || xyPoints.length != 2) {
+            logger.log(POILogger.WARN, "Invalid number of master bytes for a single point - ignore point");
+            return;
+        }
+        
+        int x, y;
+        if (xyMaster.length == 4) {
+            x = LittleEndian.getShort(xyMaster, 0);
+            y = LittleEndian.getShort(xyMaster, 2);
+        } else {
+            x = LittleEndian.getInt(xyMaster, 0);
+            y = LittleEndian.getInt(xyMaster, 4);
+        }
+        
+        xyPoints[0] = Units.masterToPoints(x);
+        xyPoints[1] = Units.masterToPoints(y);
+    }
+    
     private static <T extends EscherProperty> T getShapeProp(AbstractEscherOptRecord opt, int propId) {
         T prop = getEscherProperty(opt, (short)(propId + 0x4000));
         if (prop == null) {