com.google.scrollview.ui.SVImageHandler Class Reference

List of all members.

Static Public Member Functions
static PImage	readImage (int size, BufferedReader in)

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Detailed Description

The ScrollViewImageHandler is a helper class which takes care of image processing. It is used to construct an Image from the message-stream and basically consists of a number of utility functions to process the input stream.

Author:

wanke@google.com

Definition at line 29 of file SVImageHandler.java.

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Member Function Documentation

static PImage com.google.scrollview.ui.SVImageHandler.readImage	(	int	size,
		BufferedReader	in
	)		[inline, static]

Reads size bytes from the stream in and interprets it as an image file, encoded as png, and then text-encoded as base 64, returning the decoded bitmap.

Parameters:

size	The size of the image file.
in	The input stream from which to read the bytes.

Definition at line 42 of file SVImageHandler.java.

                                                              {
    char[] charbuffer = new char[size];
    int numRead = 0;
    while (numRead < size) {
      int newRead = -1;
      try {
        newRead = in.read(charbuffer, numRead, size - numRead);
      } catch (IOException e) {
        System.out.println("Failed to read image data from socket:" + e.getMessage());
        return null;
      }
      if (newRead < 0) {
        return null;
      }
      numRead += newRead;
    }
    if (numRead != size) {
        System.out.println("Failed to read image data from socket");
      return null;
    }
    // Convert the character data to binary.
    byte[] binarydata = DatatypeConverter.parseBase64Binary(new String(charbuffer));
    // Convert the binary data to a byte stream and parse to image.
    ByteArrayInputStream byteStream = new ByteArrayInputStream(binarydata);
    try {
      PImage img = new PImage(ImageIO.read(byteStream));
      return img;
    } catch (IOException e) {
      System.out.println("Failed to decode image data from socket" + e.getMessage());
    }
    return null;
  }

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The documentation for this class was generated from the following file:

• /usr/local/google/home/jbreiden/tesseract-ocr-read-only/java/com/google/scrollview/ui/SVImageHandler.java