java.lang.Object
- com.aowagie.text.pdf.codec.GifImage

```
public class GifImage
extends java.lang.Object
```
Reads gif images of all types. All the images in a gif are read in the constructors and can be retrieved with other methods.

Nested Class Summary

Nested Classes
Modifier and Type Class Description

private static class GifImage.GifFrame

Field Summary

Fields
Modifier and Type	Field	Description
`private byte[]`	`block`
`private int`	`blockSize`
`private int`	`dispose`
`private java.util.ArrayList`	`frames`
`private byte[]`	`fromData`
`private java.net.URL`	`fromUrl`
`private boolean`	`gctFlag`
`private int`	`height`
`private int`	`ih`
`private java.io.DataInputStream`	`in`
`private boolean`	`interlace`
`private int`	`iw`
`private int`	`ix`
`private int`	`iy`
`private boolean`	`lctFlag`
`private int`	`m_bpc`
`private byte[]`	`m_curr_table`
`private int`	`m_gbpc`
`private byte[]`	`m_global_table`
`private int`	`m_line_stride`
`private byte[]`	`m_out`
`private static int`	`MaxStackSize`
`private byte[]`	`pixelStack`
`private short[]`	`prefix`
`private byte[]`	`suffix`
`private int`	`transIndex`
`private boolean`	`transparency`
`private int`	`width`

Constructor Summary

Constructors
Constructor Description

GifImage(byte[] data)
Reads gif images from a byte array.

GifImage(java.net.URL url)
Reads gif images from an URL.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`private boolean`	`decodeImageData()`
`int`	`getFrameCount()`	Gets the number of frames the gif has.
`Image`	`getImage(int frame)`	Gets the image from a frame.
`int[]`	`getLogicalScreen()`	Gets the logical screen.
`private static int`	`newBpc(int bpc)`
`private void`	`process(java.io.InputStream is)`
`private int`	`readBlock()`	Reads next variable length block from input.
`private byte[]`	`readColorTable(int bpc)`
`private void`	`readContents()`
`private void`	`readGraphicControlExt()`	Reads Graphics Control Extension values
`private void`	`readHeader()`	Reads GIF file header information.
`private void`	`readImage()`	Reads next frame image
`private void`	`readLSD()`	Reads Logical Screen Descriptor
`private int`	`readShort()`	Reads next 16-bit value, LSB first
`private void`	`setPixel(int x, int y, int v)`
`private void`	`skip()`	Skips variable length blocks up to and including next zero length block.

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

Field Detail

in
```
private java.io.DataInputStream in
```

width
```
private int width
```

height
```
private int height
```

gctFlag
```
private boolean gctFlag
```

lctFlag
```
private boolean lctFlag
```

interlace
```
private boolean interlace
```

ix
```
private int ix
```

iy
```
private int iy
```

iw
```
private int iw
```

ih
```
private int ih
```

block
```
private final byte[] block
```

blockSize
```
private int blockSize
```

dispose
```
private int dispose
```

transparency
```
private boolean transparency
```

transIndex
```
private int transIndex
```

MaxStackSize
```
private static final int MaxStackSize
```
See Also:

Constant Field Values

prefix
```
private short[] prefix
```

suffix
```
private byte[] suffix
```

pixelStack
```
private byte[] pixelStack
```

m_out
```
private byte[] m_out
```

m_bpc
```
private int m_bpc
```

m_gbpc
```
private int m_gbpc
```

m_global_table
```
private byte[] m_global_table
```

m_curr_table
```
private byte[] m_curr_table
```

m_line_stride
```
private int m_line_stride
```

fromData
```
private byte[] fromData
```

fromUrl
```
private java.net.URL fromUrl
```

frames

private final java.util.ArrayList frames

Constructor Detail
- GifImage
```
public GifImage(java.net.URL url)
         throws java.io.IOException
```
  Reads gif images from an URL.
  
  Parameters:
  
  url - the URL
  
  Throws:
  
  java.io.IOException - on error
- GifImage
```
public GifImage(byte[] data)
         throws java.io.IOException
```
  Reads gif images from a byte array.
  
  Parameters:
  
  data - the byte array
  
  Throws:
  
  java.io.IOException - on error

Method Detail
- getFrameCount
```
public int getFrameCount()
```
  Gets the number of frames the gif has.
  
  Returns:
  
  the number of frames the gif has
- getImage
```
public Image getImage(int frame)
```
  Gets the image from a frame. The first frame is 1.
  
  Parameters:
  
  frame - the frame to get the image from
  
  Returns:
  
  the image
- getLogicalScreen
```
public int[] getLogicalScreen()
```
  Gets the logical screen. The images may be smaller and placed in some position in this screen to playback some animation. No image will be be bigger that this.
  
  Returns:
  
  the logical screen dimensions as [x,y]
- process
```
private void process(java.io.InputStream is)
              throws java.io.IOException
```
  Throws:
  
  java.io.IOException
- readHeader
```
private void readHeader()
                 throws java.io.IOException
```
  Reads GIF file header information.
  
  Throws:
  
  java.io.IOException
- readLSD
```
private void readLSD()
              throws java.io.IOException
```
  Reads Logical Screen Descriptor
  
  Throws:
  
  java.io.IOException
- readShort
```
private int readShort()
               throws java.io.IOException
```
  Reads next 16-bit value, LSB first
  
  Throws:
  
  java.io.IOException
- readBlock
```
private int readBlock()
               throws java.io.IOException
```
  Reads next variable length block from input.
  
  Returns:
  
  number of bytes stored in "buffer"
  
  Throws:
  
  java.io.IOException
- readColorTable
```
private byte[] readColorTable(int bpc)
                       throws java.io.IOException
```
  Throws:
  
  java.io.IOException
- newBpc
```
private static int newBpc(int bpc)
```
- readContents
```
private void readContents()
                   throws java.io.IOException
```
  Throws:
  
  java.io.IOException
- readImage
```
private void readImage()
                throws java.io.IOException
```
  Reads next frame image
  
  Throws:
  
  java.io.IOException
- decodeImageData
```
private boolean decodeImageData()
                         throws java.io.IOException
```
  Throws:
  
  java.io.IOException
- setPixel
```
private void setPixel(int x,
                      int y,
                      int v)
```
- readGraphicControlExt
```
private void readGraphicControlExt()
                            throws java.io.IOException
```
  Reads Graphics Control Extension values
  
  Throws:
  
  java.io.IOException
- skip
```
private void skip()
           throws java.io.IOException
```
  Skips variable length blocks up to and including next zero length block.
  
  Throws:
  
  java.io.IOException

Constructor	Description
`GifImage(byte[] data)`	Reads gif images from a byte array.
`GifImage(java.net.URL url)`	Reads gif images from an URL.

Class GifImage

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

in

width

height

gctFlag

lctFlag

interlace

ix

iy

iw

ih

block

blockSize

dispose

transparency

transIndex

MaxStackSize

prefix

suffix

pixelStack

m_out

m_bpc

m_gbpc

m_global_table

m_curr_table

m_line_stride

fromData

fromUrl

frames

Constructor Detail

GifImage

GifImage

Method Detail

getFrameCount

getImage

getLogicalScreen

process

readHeader

readLSD

readShort

readBlock

readColorTable

newBpc

readContents

readImage

decodeImageData

setPixel

readGraphicControlExt

skip