com.fr.stable.image4j.codec.bmp

类 InfoHeader

java.lang.Object

com.fr.stable.image4j.codec.bmp.InfoHeader

public class InfoHeader
extends java.lang.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

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 java.io.IOException

Creates an InfoHeader structure from the source input.

参数:

in - the source input

抛出:

java.io.IOException - if an error occurs

InfoHeader

public InfoHeader(LittleEndianInputStream in,
          int infoSize)
           throws java.io.IOException

抛出:

java.io.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 java.io.IOException

抛出:

java.io.IOException

从以下版本开始:

0.6

write

public void write(LittleEndianOutputStream out)
           throws java.io.IOException

Writes the InfoHeader structure to output

参数:

out - the output to which the structure will be written

抛出:

java.io.IOException - if an error occurs