Package com.idrsolutions.image.png

Class PngDecoder

java.lang.Object
com.idrsolutions.image.JDeliImage
com.idrsolutions.image.png.PngDecoder
All Implemented Interfaces:
com.idrsolutions.image.Decoder
public class PngDecoder extends com.idrsolutions.image.JDeliImage implements com.idrsolutions.image.Decoder
Class reads PNG images as BufferedImage. Make NO assumptions about the type of BufferedImage type returned (it may change)

Example 1 (Using raw byte data): 


 PngDecoder decoder = new PngDecoder();
 BufferedImage decodedImage = decoder.read(pngByteData);
Example 2 (Using File): 

 File pngFile = new File("C:\\path\\to\\output\\file.png");
 PngDecoder decoder = new PngDecoder();
 BufferedImage decodedImage = decoder.read(pngFile);

  • Field Summary

    Fields inherited from class com.idrsolutions.image.JDeliImage

    bb

  • Constructor Summary

    Constructors
    Constructor
    Description
    PngDecoder()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    BufferedImage
    read(byte[] pngRawData)
    Decodes and returns the PNG image as a BufferedImage from bytes
    BufferedImage
    read(File file)
    Decodes and returns the PNG image as a BufferedImage from a File
    Rectangle
    readDimension(byte[] pngRawData)
    Decodes and returns the width and height of png image
    Rectangle
    readDimension(File file)
    Decodes and returns the width and height of png image
    void
    readImageSpecificMetaData(byte[] bytes, Metadata metadata)
    Read PNG specific metadata
    void
    readImageSpecificMetaData(File file, Metadata metadata)
    Read PNG specific metadata

    Methods inherited from class com.idrsolutions.image.JDeliImage

    optimiseImage

    Methods inherited from class java.lang.Object

    equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    Methods inherited from interface com.idrsolutions.image.Decoder

    getImageCount, getImageCount, readEmbeddedThumbnail, readEmbeddedThumbnail, readImageAt, readImageAt, setMetadata

  • Constructor Details

    • PngDecoder

      public PngDecoder()

  • Method Details

    • read

      public BufferedImage read(byte[] pngRawData) throws Exception
      Decodes and returns the PNG image as a BufferedImage from bytes
      Specified by:
      read in interface com.idrsolutions.image.Decoder
      Parameters:
      pngRawData - byte[] containing the PNG data to be decoded
      Returns:
      BufferedImage The decoded image
      Throws:
      Exception - if an error occurs in reading image

    • read

      public BufferedImage read(File file) throws Exception
      Decodes and returns the PNG image as a BufferedImage from a File
      Specified by:
      read in interface com.idrsolutions.image.Decoder
      Parameters:
      file - input image file to be decoded
      Returns:
      BufferedImage decoded image
      Throws:
      Exception - if an error occurs in reading image

    • readDimension

      public Rectangle readDimension(File file) throws Exception
      Decodes and returns the width and height of png image
      Specified by:
      readDimension in interface com.idrsolutions.image.Decoder
      Parameters:
      file - image contained in raw data if present
      Returns:
      width and height of image
      Throws:
      Exception - if problem reading image

    • readDimension

      public Rectangle readDimension(byte[] pngRawData) throws Exception
      Decodes and returns the width and height of png image
      Specified by:
      readDimension in interface com.idrsolutions.image.Decoder
      Parameters:
      pngRawData - image contained in raw data if present
      Returns:
      Rectangle width and height of image
      Throws:
      Exception - if problem reading image

    • readImageSpecificMetaData

      public void readImageSpecificMetaData(byte[] bytes, Metadata metadata) throws Exception
      Read PNG specific metadata
      Specified by:
      readImageSpecificMetaData in interface com.idrsolutions.image.Decoder
      Parameters:
      bytes - byte array to read data from
      metadata - image metadata object to hold all metadata
      Throws:
      Exception

    • readImageSpecificMetaData

      public void readImageSpecificMetaData(File file, Metadata metadata) throws Exception
      Read PNG specific metadata
      Specified by:
      readImageSpecificMetaData in interface com.idrsolutions.image.Decoder
      Parameters:
      file - file to read from
      metadata - image metadata object to hold all metadata
      Throws:
      Exception