1 files changed, 153 insertions, 0 deletions
diff --git a/src/main/java/org/pdfbox/pdmodel/graphics/predictor/Uptimum.java b/src/main/java/org/pdfbox/pdmodel/graphics/predictor/Uptimum.java
new file mode 100644
index 0000000..ac03162
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+++ b/src/main/java/org/pdfbox/pdmodel/graphics/predictor/Uptimum.java
@@ -0,0 +1,153 @@
+/**
+ * Copyright (c) 2005, 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.pdmodel.graphics.predictor;
+
+/**
+ * 
+ * 
+ * In an Uptimum encoded image, each line takes up width*bpp+1 bytes. The first
+ * byte holds a number that signifies which algorithm encoded the line.
+ * 
+ * @author xylifyx@yahoo.co.uk
+ * @version $Revision: 1.2 $
+ */
+public class Uptimum extends PredictorAlgorithm 
+{
+    /**
+     * @see PredictorAlgorithm#checkBufsiz(byte[], byte[])
+     */
+    public void checkBufsiz(byte[] filtered, byte[] raw) 
+    {
+        if (filtered.length != (getWidth() * getBpp() + 1) * getHeight()) 
+        {
+
+            throw new IllegalArgumentException(
+                    "filtered.length != (width*bpp + 1) * height, "
+                            + filtered.length + " "
+                            + (getWidth() * getBpp() + 1) * getHeight()
+                            + "w,h,bpp=" + getWidth() + "," + getHeight() + ","
+                            + getBpp());
+        }
+        if (raw.length != getWidth() * getHeight() * getBpp()) 
+        {
+            throw new IllegalArgumentException(
+                    "raw.length != width * height * bpp, raw.length="
+                            + raw.length + " w,h,bpp=" + getWidth() + ","
+                            + getHeight() + "," + getBpp());
+        }
+    }
+
+    /**
+     * @see org.pdfbox.pdmodel.graphics.predictor.PredictorAlgorithm#encodeLine(byte[], byte[],
+     *      int, int, int, int)
+     */
+    public void encodeLine(byte[] src, byte[] dest, int srcDy, int srcOffset,
+            int destDy, int destOffset) 
+    {
+        throw new UnsupportedOperationException("encodeLine");
+    }
+
+    /**
+     * @see org.pdfbox.pdmodel.graphics.predictor.PredictorAlgorithm#decodeLine(byte[], byte[],
+     *      int, int, int, int)
+     */
+    public void decodeLine(byte[] src, byte[] dest, int srcDy, int srcOffset,
+            int destDy, int destOffset) 
+    {
+        throw new UnsupportedOperationException("decodeLine");
+    }
+
+    /**
+     * @see PredictorAlgorithm#encode(byte[], byte[])
+     */
+    public void encode(byte[] src, byte[] dest) 
+    {
+        checkBufsiz(dest, src);
+        throw new UnsupportedOperationException("encode");
+    }
+
+    /** 
+     * filter indexed by byte code.
+     */
+    PredictorAlgorithm[] filter = { new None(), new Sub(), new Up(), new Average(),
+            new Paeth() };
+
+    /**
+     * @see org.pdfbox.pdmodel.graphics.predictor.PredictorAlgorithm#setBpp(int)
+     */
+    public void setBpp(int bpp) 
+    {
+        super.setBpp(bpp);
+        for (int i = 0; i < filter.length; i++)
+        {
+            filter[i].setBpp(bpp);
+        }
+    }
+    /**
+     * @see org.pdfbox.pdmodel.graphics.predictor.PredictorAlgorithm#setHeight(int)
+     */
+    public void setHeight(int height) 
+    {
+        super.setHeight(height);
+        for (int i = 0; i < filter.length; i++)
+        {
+            filter[i].setHeight(height);
+        }
+    }
+
+    /**
+     * @see org.pdfbox.pdmodel.graphics.predictor.PredictorAlgorithm#setWidth(int)
+     */
+    public void setWidth(int width) 
+    {
+        super.setWidth(width);
+        for (int i = 0; i < filter.length; i++)
+        {
+            filter[i].setWidth(width);
+        }
+    }
+
+    /**
+     * @see PredictorAlgorithm#decode(byte[], byte[])
+     */
+    public void decode(byte[] src, byte[] dest) 
+    {
+        checkBufsiz(src, dest);
+        int bpl = getWidth() * getBpp();
+        int srcDy = bpl + 1;
+        for (int y = 0; y < getHeight(); y++) 
+        {
+            PredictorAlgorithm f = filter[src[y * srcDy]];
+            int srcOffset = y * srcDy + 1;
+            f.decodeLine(src, dest, srcDy, srcOffset, bpl, y * bpl);
+        }
+    }
+}
+\ No newline at end of file