InfoHeader (image4J 0.7.2 API)

java.lang.Object
- net.ifok.image.image4j.codec.bmp.InfoHeader

```
public class InfoHeader
extends Object
```
Represents a bitmap InfoHeader structure, which provides header information.

作者:

Ian McDonagh

字段概要

字段
限定符和类型	字段和说明
`int`	`iColorsImportant` Number of important colours (`0` = all).
`int`	`iColorsUsed` Number of colours actually used in the bitmap.
`int`	`iCompression` The compression type, which should be one of the following: `BI_RGB` - no compression `BI_RLE8` - 8-bit RLE compression `BI_RLE4` - 4-bit RLE compression
`int`	`iHeight` The height in pixels of the bitmap represented by this `InfoHeader`.
`int`	`iImageSize` The compressed size of the image in bytes, or `0` if `iCompression` is `0`.
`int`	`iNumColors` Calculated number of colours, based on the colour depth specified by `sBitCount`.
`int`	`iSize` The size of this `InfoHeader` structure in bytes.
`int`	`iWidth` The width in pixels of the bitmap represented by this `InfoHeader`.
`int`	`iXpixelsPerM` Horizontal resolution in pixels/m.
`int`	`iYpixelsPerM` Vertical resolution in pixels/m.
`short`	`sBitCount` The bit count, which represents the colour depth (bits per pixel).
`short`	`sPlanes` The number of planes, which should always be `1`.

构造器概要

构造器
构造器和说明
`InfoHeader()` Creates an `InfoHeader` with default values.
`InfoHeader(InfoHeader source)` Creates a copy of the source `InfoHeader`.
`InfoHeader(LittleEndianInputStream in)` Creates an `InfoHeader` structure from the source input.
`InfoHeader(LittleEndianInputStream in, int infoSize)`

方法概要

所有方法实例方法具体方法
限定符和类型	方法和说明
`protected void`	`init(LittleEndianInputStream in, int infoSize)`
`void`	`write(LittleEndianOutputStream out)` Writes the `InfoHeader` structure to output

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 字段详细资料
  - iSize
```
public int iSize
```
    The size of this InfoHeader structure in bytes.
  - iWidth
```
public int iWidth
```
    The width in pixels of the bitmap represented by this InfoHeader.
  - iHeight
```
public int iHeight
```
    The height in pixels of the bitmap represented by this InfoHeader.
  - sPlanes
```
public short sPlanes
```
    The number of planes, which should always be 1.
  - sBitCount
```
public short sBitCount
```
    The bit count, which represents the colour depth (bits per pixel). This should be either 1, 4, 8, 24 or 32.
  - iCompression
```
public int iCompression
```
    The compression type, which should be one of the following:
    - BI_RGB - no compression
    - BI_RLE8 - 8-bit RLE compression
    - BI_RLE4 - 4-bit RLE compression
  - iImageSize
```
public int iImageSize
```
    The compressed size of the image in bytes, or 0 if iCompression is 0.
  - iXpixelsPerM
```
public int iXpixelsPerM
```
    Horizontal resolution in pixels/m.
  - iYpixelsPerM
```
public int iYpixelsPerM
```
    Vertical resolution in pixels/m.
  - iColorsUsed
```
public int iColorsUsed
```
    Number of colours actually used in the bitmap.
  - iColorsImportant
```
public int iColorsImportant
```
    Number of important colours (0 = all).
  - iNumColors
```
public int iNumColors
```
    Calculated number of colours, based on the colour depth specified by sBitCount.
- 构造器详细资料
  - InfoHeader
```
public InfoHeader(LittleEndianInputStream in)
           throws IOException
```
    Creates an InfoHeader structure from the source input.
    
    参数:
    
    in - the source input
    
    抛出:
    
    IOException - if an error occurs
  - InfoHeader
```
public InfoHeader(LittleEndianInputStream in,
                  int infoSize)
           throws IOException
```
    抛出:
    
    IOException
    
    从以下版本开始:
    
    0.6
  - InfoHeader
```
public InfoHeader()
```
    Creates an InfoHeader with default values.
  - InfoHeader
```
public InfoHeader(InfoHeader source)
```
    Creates a copy of the source InfoHeader.
    
    参数:
    
    source - the source to copy
- 方法详细资料
  - init
```
protected void init(LittleEndianInputStream in,
                    int infoSize)
             throws IOException
```
    抛出:
    
    IOException
    
    从以下版本开始:
    
    0.6
  - write
```
public void write(LittleEndianOutputStream out)
           throws IOException
```
    Writes the InfoHeader structure to output
    
    参数:
    
    out - the output to which the structure will be written
    
    抛出:
    
    IOException - if an error occurs

类 InfoHeader

字段概要

构造器概要

方法概要

从类继承的方法 java.lang.Object

字段详细资料

iSize

iWidth

iHeight

sPlanes

sBitCount

iCompression

iImageSize

iXpixelsPerM

iYpixelsPerM

iColorsUsed

iColorsImportant

iNumColors

构造器详细资料

InfoHeader

InfoHeader

InfoHeader

InfoHeader

方法详细资料

init

write