diff options
Diffstat (limited to 'src/main/java/org/pdfbox/pdmodel/graphics/predictor/PredictorAlgorithm.java')
| -rw-r--r-- | src/main/java/org/pdfbox/pdmodel/graphics/predictor/PredictorAlgorithm.java | 336 |
1 files changed, 0 insertions, 336 deletions
diff --git a/src/main/java/org/pdfbox/pdmodel/graphics/predictor/PredictorAlgorithm.java b/src/main/java/org/pdfbox/pdmodel/graphics/predictor/PredictorAlgorithm.java deleted file mode 100644 index 11f60f9..0000000 --- a/src/main/java/org/pdfbox/pdmodel/graphics/predictor/PredictorAlgorithm.java +++ /dev/null @@ -1,336 +0,0 @@ -/**
- * 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;
-
-import java.util.Random;
-
-/**
- * Implements different PNG predictor algorithms that is used in PDF files.
- *
- * @author xylifyx@yahoo.co.uk
- * @version $Revision: 1.2 $
- * @see http://www.w3.org/TR/PNG-Filters.html
- */
-public abstract class PredictorAlgorithm
-{
- private int width;
-
- private int height;
-
- private int bpp;
-
- /**
- * check that buffer sizes matches width,height,bpp. This implementation is
- * used by most of the filters, but not Uptimum.
- *
- * @param src The source buffer.
- * @param dest The destination buffer.
- */
- public void checkBufsiz(byte[] src, byte[] dest)
- {
- if (src.length != dest.length)
- {
- throw new IllegalArgumentException("src.length != dest.length");
- }
- if (src.length != getWidth() * getHeight() * getBpp())
- {
- throw new IllegalArgumentException(
- "src.length != width * height * bpp");
- }
- }
-
- /**
- * encode line of pixel data in src from srcOffset and width*bpp bytes
- * forward, put the decoded bytes into dest.
- *
- * @param src
- * raw image data
- * @param dest
- * encoded data
- * @param srcDy
- * byte offset between lines
- * @param srcOffset
- * beginning of line data
- * @param destDy
- * byte offset between lines
- * @param destOffset
- * beginning of line data
- */
- public abstract void encodeLine(byte[] src, byte[] dest, int srcDy,
- int srcOffset, int destDy, int destOffset);
-
- /**
- * decode line of pixel data in src from src_offset and width*bpp bytes
- * forward, put the decoded bytes into dest.
- *
- * @param src
- * encoded image data
- * @param dest
- * raw data
- * @param srcDy
- * byte offset between lines
- * @param srcOffset
- * beginning of line data
- * @param destDy
- * byte offset between lines
- * @param destOffset
- * beginning of line data
- */
- public abstract void decodeLine(byte[] src, byte[] dest, int srcDy,
- int srcOffset, int destDy, int destOffset);
-
- /**
- * Simple command line program to test the algorithm.
- *
- * @param args The command line arguments.
- */
- public static void main(String[] args)
- {
- Random rnd = new Random();
- int width = 5;
- int height = 5;
- int bpp = 3;
- byte[] raw = new byte[width * height * bpp];
- rnd.nextBytes(raw);
- System.out.println("raw: ");
- dump(raw);
- for (int i = 10; i < 15; i++)
- {
- byte[] decoded = new byte[width * height * bpp];
- byte[] encoded = new byte[width * height * bpp];
-
- PredictorAlgorithm filter = PredictorAlgorithm.getFilter(i);
- filter.setWidth(width);
- filter.setHeight(height);
- filter.setBpp(bpp);
- filter.encode(raw, encoded);
- filter.decode(encoded, decoded);
- System.out.println(filter.getClass().getName());
- dump(decoded);
- }
- }
-
- /**
- * Get the left pixel from the buffer.
- *
- * @param buf The buffer.
- * @param offset The offset into the buffer.
- * @param dy The dy value.
- * @param x The x value.
- *
- * @return The left pixel.
- */
- public int leftPixel(byte[] buf, int offset, int dy, int x)
- {
- return x >= getBpp() ? buf[offset + x - getBpp()] : 0;
- }
-
- /**
- * Get the above pixel from the buffer.
- *
- * @param buf The buffer.
- * @param offset The offset into the buffer.
- * @param dy The dy value.
- * @param x The x value.
- *
- * @return The above pixel.
- */
- public int abovePixel(byte[] buf, int offset, int dy, int x)
- {
- return offset >= dy ? buf[offset + x - dy] : 0;
- }
-
- /**
- * Get the above-left pixel from the buffer.
- *
- * @param buf The buffer.
- * @param offset The offset into the buffer.
- * @param dy The dy value.
- * @param x The x value.
- *
- * @return The above-left pixel.
- */
- public int aboveLeftPixel(byte[] buf, int offset, int dy, int x)
- {
- return offset >= dy && x >= getBpp() ? buf[offset + x - dy - getBpp()]
- : 0;
- }
-
- /**
- * Simple helper to print out a buffer.
- *
- * @param raw The bytes to print out.
- */
- private static void dump(byte[] raw)
- {
- for (int i = 0; i < raw.length; i++)
- {
- System.out.print(raw[i] + " ");
- }
- System.out.println();
- }
-
- /**
- * @return Returns the bpp.
- */
- public int getBpp()
- {
- return bpp;
- }
-
- /**
- * @param newBpp
- * The bpp to set.
- */
- public void setBpp(int newBpp)
- {
- bpp = newBpp;
- }
-
- /**
- * @return Returns the height.
- */
- public int getHeight()
- {
- return height;
- }
-
- /**
- * @param newHeight
- * The height to set.
- */
- public void setHeight(int newHeight)
- {
- height = newHeight;
- }
-
- /**
- * @return Returns the width.
- */
- public int getWidth()
- {
- return width;
- }
-
- /**
- * @param newWidth
- * The width to set.
- */
- public void setWidth(int newWidth)
- {
- this.width = newWidth;
- }
-
-
- /**
- * encode a byte array full of image data using the filter that this object
- * implements.
- *
- * @param src
- * buffer
- * @param dest
- * buffer
- */
- public void encode(byte[] src, byte[] dest)
- {
- checkBufsiz(dest, src);
- int dy = getWidth()*getBpp();
- for (int y = 0; y < height; y++)
- {
- int yoffset = y * dy;
- encodeLine(src, dest, dy, yoffset, dy, yoffset);
- }
- }
-
- /**
- * decode a byte array full of image data using the filter that this object
- * implements.
- *
- * @param src
- * buffer
- * @param dest
- * buffer
- */
- public void decode(byte[] src, byte[] dest)
- {
- checkBufsiz(src, dest);
- int dy = width * bpp;
- for (int y = 0; y < height; y++)
- {
- int yoffset = y * dy;
- decodeLine(src, dest, dy, yoffset, dy, yoffset);
- }
- }
-
- /**
- * @param predictor
- * <ul>
- * <li>1 No prediction (the default value)
- * <li>2 TIFF Predictor 2
- * <li>10 PNG prediction (on encoding, PNG None on all rows)
- * <li>11 PNG prediction (on encoding, PNG Sub on all rows)
- * <li>12 PNG prediction (on encoding, PNG Up on all rows)
- * <li>13 PNG prediction (on encoding, PNG Average on all rows)
- * <li>14 PNG prediction (on encoding, PNG Paeth on all rows)
- * <li>15 PNG prediction (on encoding, PNG optimum)
- * </ul>
- *
- * @return The predictor class based on the predictor code.
- */
- public static PredictorAlgorithm getFilter(int predictor)
- {
- PredictorAlgorithm filter;
- switch (predictor)
- {
- case 10:
- filter = new None();
- break;
- case 11:
- filter = new Sub();
- break;
- case 12:
- filter = new Up();
- break;
- case 13:
- filter = new Average();
- break;
- case 14:
- filter = new Paeth();
- break;
- case 15:
- filter = new Uptimum();
- break;
- default:
- filter = new None();
- }
- return filter;
- }
-}
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