Package org.apache.commons.imaging.formats.png

Class ScanExpediter

java.lang.Object

org.apache.commons.imaging.formats.png.ScanExpediter

Direct Known Subclasses:

ScanExpediterInterlaced, ScanExpediterSimple

abstract class ScanExpediter
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field	Description
(package private) java.awt.image.BufferedImage	bi
(package private) int	bitDepth
(package private) int	bitsPerPixel
(package private) int	bytesPerPixel
(package private) GammaCorrection	gammaCorrection
(package private) int	height
(package private) java.io.InputStream	is
(package private) PngChunkPlte	pngChunkPLTE
(package private) PngColorType	pngColorType
(package private) TransparencyFilter	transparencyFilter
(package private) int	width

Constructor Summary

Constructors

Constructor	Description
ScanExpediter(int width, int height, java.io.InputStream is, java.awt.image.BufferedImage bi, PngColorType pngColorType, int bitDepth, int bitsPerPixel, PngChunkPlte pngChunkPLTE, GammaCorrection gammaCorrection, TransparencyFilter transparencyFilter)

Method Summary

Modifier and Type	Method	Description
abstract void	drive()
(package private) int	getBitsToBytesRoundingUp(int bits)
(package private) byte[]	getNextScanline(java.io.InputStream is, int length, byte[] prev, int bytesPerPixel)
(package private) int	getPixelARGB(int alpha, int red, int green, int blue)
(package private) int	getPixelRGB(int red, int green, int blue)
(package private) int	getRGB(BitParser bitParser, int pixelIndexInScanline)
(package private) ScanlineFilter	getScanlineFilter(FilterType filterType, int bytesPerPixel)
(package private) byte[]	unfilterScanline(FilterType filterType, byte[] src, byte[] prev, int bytesPerPixel)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

width

final int width

height

final int height

is

final java.io.InputStream is

bi

final java.awt.image.BufferedImage bi

pngColorType

final PngColorType pngColorType

bitDepth

final int bitDepth

bytesPerPixel

final int bytesPerPixel

bitsPerPixel

final int bitsPerPixel

pngChunkPLTE

final PngChunkPlte pngChunkPLTE

gammaCorrection

final GammaCorrection gammaCorrection

transparencyFilter

final TransparencyFilter transparencyFilter

Constructor Detail

ScanExpediter

ScanExpediter(int width,
              int height,
              java.io.InputStream is,
              java.awt.image.BufferedImage bi,
              PngColorType pngColorType,
              int bitDepth,
              int bitsPerPixel,
              PngChunkPlte pngChunkPLTE,
              GammaCorrection gammaCorrection,
              TransparencyFilter transparencyFilter)

Method Detail

getBitsToBytesRoundingUp

final int getBitsToBytesRoundingUp(int bits)

getPixelARGB

final int getPixelARGB(int alpha,
                       int red,
                       int green,
                       int blue)

getPixelRGB

final int getPixelRGB(int red,
                      int green,
                      int blue)

drive

public abstract void drive()
                    throws ImageReadException,
                           java.io.IOException

Throws:

ImageReadException

java.io.IOException

getRGB

int getRGB(BitParser bitParser,
           int pixelIndexInScanline)
    throws ImageReadException,
           java.io.IOException

Throws:

ImageReadException

java.io.IOException

getScanlineFilter

ScanlineFilter getScanlineFilter(FilterType filterType,
                                 int bytesPerPixel)
                          throws ImageReadException

Throws:

ImageReadException

unfilterScanline

byte[] unfilterScanline(FilterType filterType,
                        byte[] src,
                        byte[] prev,
                        int bytesPerPixel)
                 throws ImageReadException,
                        java.io.IOException

Throws:

ImageReadException

java.io.IOException

getNextScanline

byte[] getNextScanline(java.io.InputStream is,
                       int length,
                       byte[] prev,
                       int bytesPerPixel)
                throws ImageReadException,
                       java.io.IOException

Throws:

ImageReadException

java.io.IOException