com.itextpdf.pdfoptimizer.handlers.util

Class BitmapImagePixels

java.lang.Object

com.itextpdf.pdfoptimizer.handlers.util.BitmapImagePixels

public class BitmapImagePixels
extends Object

Class allows to process pixels of the bitmap image stored as byte array according to PDF specification.

Constructor Summary

Constructors

Constructor and Description
BitmapImagePixels(int width, int height, int bitsPerComponent, int numberOfComponents) Creates a representation of empty image.
BitmapImagePixels(int width, int height, int bitsPerComponent, int numberOfComponents, byte[] data) Creates a representation of an image presented as bytes array.
BitmapImagePixels(com.itextpdf.kernel.pdf.xobject.PdfImageXObject image) Creates a representation of an image presented as PdfImageXObject.

Method Summary

Modifier and Type	Method and Description
int	getBitsPerComponent() Getter for bits per component parameter of the image.
byte[]	getData() Getter for byte representation of the image.
int	getHeight() Getter for a height of the image.
int	getMaxComponentValue() Gets the maximum value for the component.
int	getNumberOfComponents() Getter for number of components parameter of the image.
double[]	getPixel(int x, int y) Gets pixel of the image.
long[]	getPixelAsLongs(int x, int y) Gets pixel of the image presented as long values.
int	getWidth() Getter for a width of the image.
void	setPixel(int x, int y, double[] value) Updates a pixel of the image.
void	setPixel(int x, int y, long[] value) Updates a pixel of the image.

Methods inherited from class java.lang.Object

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

Constructor Detail

BitmapImagePixels

public BitmapImagePixels(int width,
                         int height,
                         int bitsPerComponent,
                         int numberOfComponents)

Creates a representation of empty image.

Parameters:

width - is a width of the image

height - is a height of the image

bitsPerComponent - is an amount of bits representing each color component of a pixel

numberOfComponents - is a number of components representing a pixel

BitmapImagePixels

public BitmapImagePixels(com.itextpdf.kernel.pdf.xobject.PdfImageXObject image)

Creates a representation of an image presented as PdfImageXObject.

Parameters:

image - is an image as PdfImageXObject

BitmapImagePixels

public BitmapImagePixels(int width,
                         int height,
                         int bitsPerComponent,
                         int numberOfComponents,
                         byte[] data)

Creates a representation of an image presented as bytes array.

Parameters:

width - is a width of the image

height - is a height of the image

bitsPerComponent - is an amount of bits representing each color component of a pixel

numberOfComponents - is a number of components representing a pixel

data - is an image data

Method Detail

getPixel

public double[] getPixel(int x,
                         int y)

Gets pixel of the image.

Parameters:

x - is an x-coordinate of a pixel to update

y - is a y-coordinate of a pixel to update

Returns:

an array representing pixel color according to used color space

getPixelAsLongs

public long[] getPixelAsLongs(int x,
                              int y)

Gets pixel of the image presented as long values.

Parameters:

x - is an x-coordinate of a pixel to update

y - is a y-coordinate of a pixel to update

Returns:

an array representing pixel color according to used color space

setPixel

public void setPixel(int x,
                     int y,
                     double[] value)

Updates a pixel of the image.

Parameters:

x - is an x-coordinate of a pixel to update

y - is a y-coordinate of a pixel to update

value - is a pixel color. Pixel should be presented as double array according to used color space. Each value should be in range [0., 1.] (otherwise negative value will be replaced with 0. and large numbers are replaced with 1.)

setPixel

public void setPixel(int x,
                     int y,
                     long[] value)

Updates a pixel of the image.

Parameters:

x - is an x-coordinate of a pixel to update

y - is a y-coordinate of a pixel to update

value - is a pixel color. Pixel should be presented as long array according to used color space. Each value should be in range [0, 2 ^ bitsPerComponent - 1] (otherwise negative value will be replaced with 0. and large numbers are replaced with maximum allowed value.)

getWidth

public int getWidth()

Getter for a width of the image.

Returns:

width of the image

getHeight

public int getHeight()

Getter for a height of the image.

Returns:

height of the image

getBitsPerComponent

public int getBitsPerComponent()

Getter for bits per component parameter of the image.

Returns:

bits per component parameter of the image

getNumberOfComponents

public int getNumberOfComponents()

Getter for number of components parameter of the image.

Returns:

number of components of the image

getData

public byte[] getData()

Getter for byte representation of the image.

Returns:

image data as byte array

getMaxComponentValue

public int getMaxComponentValue()

Gets the maximum value for the component.

Returns:

maximum value of the component