org.apache.sanselan.formats.png
Class ScanExpediter

java.lang.Object
  org.apache.sanselan.common.BinaryFileFunctions
      org.apache.sanselan.common.BinaryFileParser
          org.apache.sanselan.formats.png.ScanExpediter

All Implemented Interfaces:

BinaryConstants

Direct Known Subclasses:

ScanExpediterInterlaced, ScanExpediterSimple

public abstract class ScanExpediter
extends BinaryFileParser

Field Summary

protected java.awt.image.BufferedImage	bi
protected int	bitDepth
protected int	bitsPerPixel
protected int	bytesPerPixel
protected int	colorType
protected GammaCorrection	gammaCorrection
protected int	height
protected java.io.InputStream	is
protected PNGChunkPLTE	pngChunkPLTE
protected TransparencyFilter	transparencyFilter
protected int	width

Fields inherited from class org.apache.sanselan.common.BinaryFileFunctions

debug

Fields inherited from interface org.apache.sanselan.common.BinaryConstants

BYTE_ORDER_BIG_ENDIAN, BYTE_ORDER_INTEL, BYTE_ORDER_LEAST_SIGNIFICANT_BYTE, BYTE_ORDER_LITTLE_ENDIAN, BYTE_ORDER_LSB, BYTE_ORDER_MOST_SIGNIFICANT_BYTE, BYTE_ORDER_MOTOROLA, BYTE_ORDER_MSB, BYTE_ORDER_NETWORK

Constructor Summary

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

Method Summary

abstract void	drive()
protected int	getBitsToBytesRoundingUp(int bits)
protected byte[]	getNextScanline(java.io.InputStream is, int length, byte[] prev, int BytesPerPixel)
protected int	getPixelARGB(int alpha, int red, int green, int blue)
protected int	getPixelRGB(int red, int green, int blue)
protected int	getRGB(BitParser bitParser, int pixelIndexInScanline)
protected ScanlineFilter	getScanlineFilter(int filter_type, int BytesPerPixel)
protected byte[]	unfilterScanline(int filter_type, byte[] src, byte[] prev, int BytesPerPixel)

Methods inherited from class org.apache.sanselan.common.BinaryFileParser

byteArrayHasPrefix, convertByteArrayToInt, convertByteArrayToInt, convertByteArrayToShort, convertByteArrayToShort, getByteOrder, int2ToByteArray, read2Bytes, read3Bytes, read4Bytes, setByteOrder, setByteOrder

Methods inherited from class org.apache.sanselan.common.BinaryFileFunctions

CharsToQuad, compareByteArrays, compareByteArrays, compareBytes, compareBytes, convertByteArrayToDouble, convertByteArrayToDouble, convertByteArrayToDoubleArray, convertByteArrayToFloat, convertByteArrayToFloat, convertByteArrayToFloatArray, convertByteArrayToInt, convertByteArrayToInt, convertByteArrayToIntArray, convertByteArrayToRational, convertByteArrayToRational, convertByteArrayToRationalArray, convertByteArrayToShort, convertByteArrayToShort, convertByteArrayToShortArray, convertDoubleArrayToByteArray, convertDoubleToByteArray, convertFloatArrayToByteArray, convertFloatToByteArray, convertIntArrayToByteArray, convertIntArrayToRationalArray, convertRationalArrayToByteArray, convertRationalToByteArray, convertShortArrayToByteArray, convertShortToByteArray, copyStreamToStream, debugByteArray, debugNumber, debugNumber, debugNumber, debugNumber, debugNumberArray, findNull, findNull, getBytearrayHead, getByteArrayTail, getDebug, getRAFBytes, getStreamBytes, head, int2ToByteArray, printByteBits, printCharQuad, printCharQuad, read2Bytes, read3Bytes, read4Bytes, readAndVerifyBytes, readAndVerifyBytes, readByte, readBytearray, readByteArray, readByteArray, readBytes, readRandomBytes, scanForByte, setDebug, skipBytes, skipBytes, slice, startsWith, tail, writeIntInToByteArray

Methods inherited from class java.lang.Object

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

Field Detail

width

protected final int width

height

protected final int height

is

protected final java.io.InputStream is

bi

protected final java.awt.image.BufferedImage bi

colorType

protected final int colorType

bitDepth

protected final int bitDepth

bytesPerPixel

protected final int bytesPerPixel

bitsPerPixel

protected final int bitsPerPixel

pngChunkPLTE

protected final PNGChunkPLTE pngChunkPLTE

gammaCorrection

protected final GammaCorrection gammaCorrection

transparencyFilter

protected final TransparencyFilter transparencyFilter

Constructor Detail

ScanExpediter

public ScanExpediter(int width,
                     int height,
                     java.io.InputStream is,
                     java.awt.image.BufferedImage bi,
                     int color_type,
                     int bitDepth,
                     int bitsPerPixel,
                     PNGChunkPLTE pngChunkPLTE,
                     GammaCorrection gammaCorrection,
                     TransparencyFilter transparencyFilter)

Method Detail

getBitsToBytesRoundingUp

protected int getBitsToBytesRoundingUp(int bits)

getPixelARGB

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

getPixelRGB

protected 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

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

Throws:

ImageReadException

java.io.IOException

getScanlineFilter

protected ScanlineFilter getScanlineFilter(int filter_type,
                                           int BytesPerPixel)
                                    throws ImageReadException,
                                           java.io.IOException

Throws:

ImageReadException

java.io.IOException

unfilterScanline

protected byte[] unfilterScanline(int filter_type,
                                  byte[] src,
                                  byte[] prev,
                                  int BytesPerPixel)
                           throws ImageReadException,
                                  java.io.IOException

Throws:

ImageReadException

java.io.IOException

getNextScanline

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

Throws:

ImageReadException

java.io.IOException