1 files changed, 106 insertions, 0 deletions
diff --git a/src/main/java/org/pdfbox/util/operator/Concatenate.java b/src/main/java/org/pdfbox/util/operator/Concatenate.java
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+++ b/src/main/java/org/pdfbox/util/operator/Concatenate.java
@@ -0,0 +1,106 @@
+/**
+ * Copyright (c) 2004, www.pdfbox.org
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, 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. Neither the name of pdfbox; nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS 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 REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, 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.
+ *
+ * http://www.pdfbox.org
+ *
+ */
+package org.pdfbox.util.operator;
+
+import java.util.List;
+import org.pdfbox.cos.COSNumber;
+import org.apache.log4j.Logger;
+import org.pdfbox.util.Matrix;
+import org.pdfbox.util.PDFOperator;
+
+/**
+ *
+ * <p>Titre : PDFEngine Modification.</p>
+ * <p>Description : Structal modification of the PDFEngine class :
+* the long sequence of conditions in processOperator is remplaced by
+* this strategy pattern</p>
+ * <p>Copyright : Copyright (c) 2004</p>
+ * <p>Société : DBGS</p>
+ * @author Huault : huault@free.fr
+ * @version $Revision: 1.3 $
+ */
+
+public class Concatenate extends OperatorProcessor 
+{
+
+    private static final Logger LOG = Logger.getLogger(Concatenate.class);
+
+    /**
+     * process : cm : Concatenate matrix to current transformation matrix.
+     * @param operator The operator that is being executed.
+     * @param arguments List
+     */
+    public void process(PDFOperator operator, List arguments) 
+    {
+
+        //concatenate matrix to current transformation matrix
+        COSNumber a = (COSNumber) arguments.get(0);
+        COSNumber b = (COSNumber) arguments.get(1);
+        COSNumber c = (COSNumber) arguments.get(2);
+        COSNumber d = (COSNumber) arguments.get(3);
+        COSNumber e = (COSNumber) arguments.get(4);
+        COSNumber f = (COSNumber) arguments.get(5);
+    
+        if( LOG.isDebugEnabled() ) 
+        {
+            LOG.debug("<cm " +
+                    "a=\"" + a.floatValue() + "\" " +
+                    "b=\"" + b.floatValue() + "\" " +
+                    "c=\"" + c.floatValue() + "\" " +
+                    "d=\"" + d.floatValue() + "\" " +
+                    "e=\"" + e.floatValue() + "\" " +
+                    "f=\"" + f.floatValue() + "\" > " +
+                    this.toString() + " from " + context.toString());
+        }
+    
+        Matrix newMatrix = new Matrix();
+        newMatrix.setValue(0, 0, a.floatValue());
+        newMatrix.setValue(0, 1, b.floatValue());
+        newMatrix.setValue(1, 0, c.floatValue());
+        newMatrix.setValue(1, 1, d.floatValue());
+        newMatrix.setValue(2, 0, e.floatValue());
+        newMatrix.setValue(2, 1, f.floatValue());
+    
+        // wprinz: BUG Fix:
+        // In PDF, matrices have to be multiplied from left to right
+        // (the new matrix is left, the old one(s) are right)
+        
+        Matrix old_ctm = context.getGraphicsState().getCurrentTransformationMatrix();
+        Matrix matrix_to_concat = newMatrix;
+        Matrix new_ctm = matrix_to_concat.multiply(old_ctm);
+        context.getGraphicsState().setCurrentTransformationMatrix(
+                new_ctm );
+        
+        // :wprinz
+
+    }
+
+}