ImageExtractor.GifFileReader.ImageDescriptorReader (P2J - Progress 4GL to Java Conversion and Runtime)

java.lang.Object
- com.goldencode.p2j.ui.ImageExtractor.GifFileReader.ImageDescriptorReader

Enclosing class:

ImageExtractor.GifFileReader
```
class ImageExtractor.GifFileReader.ImageDescriptorReader
extends java.lang.Object
```
Represents the Image Descriptor section recognizer.

Field Summary

Fields
Modifier and Type	Field and Description
`private int`	`height` The image height.
`private static byte`	`IMAGE_DESCRIPTOR_MARKER` The value of the first byte of the the Image Descriptor section.
`private int`	`left` The left position of the image within the given GIF canvas.
`private int`	`packedByte` The packed byte.
`private int`	`top` The top position of the image within the given GIF canvas.
`private int`	`width` The image width.

Constructor Summary

Constructors
Constructor and Description

ImageDescriptorReader()

Constructors
Constructor and Description
`ImageDescriptorReader()`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`(package private) int`	`getBitsPerPixel()` Retrieves information about the bits per a pixel.
`(package private) boolean`	`hasLocalColorTable()` Retrieves information about the next section.
`boolean`	`testImageDescriptor(java.io.RandomAccessFile raf)` Tests its section marker and then reads its data.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - IMAGE_DESCRIPTOR_MARKER
```
private static final byte IMAGE_DESCRIPTOR_MARKER
```
    The value of the first byte of the the Image Descriptor section.
    
    See Also:
    
    Constant Field Values
  - left
```
private int left
```
    The left position of the image within the given GIF canvas.
  - top
```
private int top
```
    The top position of the image within the given GIF canvas.
  - width
```
private int width
```
    The image width.
  - height
```
private int height
```
    The image height.
  - packedByte
```
private int packedByte
```
    The packed byte.
- Constructor Detail
  - ImageDescriptorReader
```
ImageDescriptorReader()
```
- Method Detail
  - testImageDescriptor
```
public boolean testImageDescriptor(java.io.RandomAccessFile raf)
                            throws java.io.IOException
```
    Tests its section marker and then reads its data.
    
    Parameters:
    
    raf - The data represented by the random access file
    
    Returns:
    
    True iff this section has the correct marker and its data has been read successfully, otherwise false.
    
    Throws:
    
    java.io.IOException - If IO error occurs while reading data and moving the current file pointer.
  - hasLocalColorTable
```
boolean hasLocalColorTable()
```
    Retrieves information about the next section.
    
    Returns:
    
    True iff the next section is the Local Color Table section, otherwise false.
  - getBitsPerPixel
```
int getBitsPerPixel()
```
    Retrieves information about the bits per a pixel.
    
    Returns:
    
    The bits per a pixel.

Class ImageExtractor.GifFileReader.ImageDescriptorReader

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

IMAGE_DESCRIPTOR_MARKER

left

top

width

height

packedByte

Constructor Detail

ImageDescriptorReader

Method Detail

testImageDescriptor

hasLocalColorTable

getBitsPerPixel