Java Doc for PredictorAlgorithm.java in  » PDF » PDFBox-0.7.3 » org » pdfbox » pdmodel » graphics » predictor » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » PDF » PDFBox 0.7.3 » org.pdfbox.pdmodel.graphics.predictor   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    org.pdfbox.pdmodel.graphics.predictor.PredictorAlgorithm All known Subclasses:   org.pdfbox.pdmodel.graphics.predictor.Sub,  org.pdfbox.pdmodel.graphics.predictor.Up,  org.pdfbox.pdmodel.graphics.predictor.None,  org.pdfbox.pdmodel.graphics.predictor.Paeth,  org.pdfbox.pdmodel.graphics.predictor.Average,  org.pdfbox.pdmodel.graphics.predictor.Uptimum, PredictorAlgorithm abstract public class PredictorAlgorithm (Code) Implements different PNG predictor algorithms that is used in PDF files. author:    xylifyx@yahoo.co.uk version:    $Revision: 1.3 $ See Also:    PNG Filters Method Summary public  int aboveLeftPixel(byte[] buf, int offset, int dy, int x)      Get the above-left pixel from the buffer. Parameters:   buf - The buffer. Parameters:   offset - The offset into the buffer. Parameters:   dy - The dy value. Parameters:   x - The x value. public  int abovePixel(byte[] buf, int offset, int dy, int x)      Get the above pixel from the buffer. Parameters:   buf - The buffer. Parameters:   offset - The offset into the buffer. Parameters:   dy - The dy value. Parameters:   x - The x value. public  void checkBufsiz(byte[] src, byte[] dest)      check that buffer sizes matches width,height,bpp. public  void decode(byte[] src, byte[] dest)      decode a byte array full of image data using the filter that this object implements. abstract public  void decodeLine(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. public  void encode(byte[] src, byte[] dest)      encode a byte array full of image data using the filter that this object implements. abstract public  void encodeLine(byte[] src, byte[] dest, int srcDy, int srcOffset, int destDy, int destOffset)      encode line of pixel data in src from srcOffset and width*bpp bytes forward, put the decoded bytes into dest. public  int getBpp()      public static  PredictorAlgorithm getFilter(int predictor)      public  int getHeight()      public  int getWidth()      public  int leftPixel(byte[] buf, int offset, int dy, int x)      Get the left pixel from the buffer. Parameters:   buf - The buffer. Parameters:   offset - The offset into the buffer. Parameters:   dy - The dy value. Parameters:   x - The x value. public static  void main(String[] args)      Simple command line program to test the algorithm. public  void setBpp(int newBpp)      public  void setHeight(int newHeight)      public  void setWidth(int newWidth)      Method Detail aboveLeftPixel public int aboveLeftPixel(byte[] buf, int offset, int dy, int x)(Code) Get the above-left pixel from the buffer. Parameters:   buf - The buffer. Parameters:   offset - The offset into the buffer. Parameters:   dy - The dy value. Parameters:   x - The x value. The above-left pixel. abovePixel public int abovePixel(byte[] buf, int offset, int dy, int x)(Code) Get the above pixel from the buffer. Parameters:   buf - The buffer. Parameters:   offset - The offset into the buffer. Parameters:   dy - The dy value. Parameters:   x - The x value. The above pixel. checkBufsiz public void checkBufsiz(byte[] src, byte[] dest)(Code) check that buffer sizes matches width,height,bpp. This implementation is used by most of the filters, but not Uptimum. Parameters:   src - The source buffer. Parameters:   dest - The destination buffer. decode public void decode(byte[] src, byte[] dest)(Code) decode a byte array full of image data using the filter that this object implements. Parameters:   src - buffer Parameters:   dest - buffer decodeLine abstract public void decodeLine(byte[] src, byte[] dest, int srcDy, int srcOffset, int destDy, int destOffset)(Code) decode line of pixel data in src from src_offset and width*bpp bytes forward, put the decoded bytes into dest. Parameters:   src - encoded image data Parameters:   dest - raw data Parameters:   srcDy - byte offset between lines Parameters:   srcOffset - beginning of line data Parameters:   destDy - byte offset between lines Parameters:   destOffset - beginning of line data encode public void encode(byte[] src, byte[] dest)(Code) encode a byte array full of image data using the filter that this object implements. Parameters:   src - buffer Parameters:   dest - buffer encodeLine abstract public void encodeLine(byte[] src, byte[] dest, int srcDy, int srcOffset, int destDy, int destOffset)(Code) encode line of pixel data in src from srcOffset and width*bpp bytes forward, put the decoded bytes into dest. Parameters:   src - raw image data Parameters:   dest - encoded data Parameters:   srcDy - byte offset between lines Parameters:   srcOffset - beginning of line data Parameters:   destDy - byte offset between lines Parameters:   destOffset - beginning of line data getBpp public int getBpp()(Code) Returns the bpp. getFilter public static PredictorAlgorithm getFilter(int predictor)(Code) Parameters:   predictor - 1 No prediction (the default value) 2 TIFF Predictor 2 10 PNG prediction (on encoding, PNG None on all rows) 11 PNG prediction (on encoding, PNG Sub on all rows) 12 PNG prediction (on encoding, PNG Up on all rows) 13 PNG prediction (on encoding, PNG Average on all rows) 14 PNG prediction (on encoding, PNG Paeth on all rows) 15 PNG prediction (on encoding, PNG optimum) The predictor class based on the predictor code. getHeight public int getHeight()(Code) Returns the height. getWidth public int getWidth()(Code) Returns the width. leftPixel public int leftPixel(byte[] buf, int offset, int dy, int x)(Code) Get the left pixel from the buffer. Parameters:   buf - The buffer. Parameters:   offset - The offset into the buffer. Parameters:   dy - The dy value. Parameters:   x - The x value. The left pixel. main public static void main(String[] args)(Code) Simple command line program to test the algorithm. Parameters:   args - The command line arguments. setBpp public void setBpp(int newBpp)(Code) Parameters:   newBpp - The bpp to set. setHeight public void setHeight(int newHeight)(Code) Parameters:   newHeight - The height to set. setWidth public void setWidth(int newWidth)(Code) Parameters:   newWidth - The width to set. Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)