Package com.itextpdf.io.image

Class PngImageData

java.lang.Object

com.itextpdf.io.image.ImageData

com.itextpdf.io.image.RawImageData

com.itextpdf.io.image.PngImageData

       public class PngImageData extends RawImageData
      

Image data and PNG-specific color information.

Field Summary

Fields inherited from class com.itextpdf.io.image.RawImageData

CCITT_BLACKIS1, CCITT_ENCODEDBYTEALIGN, CCITT_ENDOFBLOCK, CCITT_ENDOFLINE, CCITTG3_1D, CCITTG3_2D, CCITTG4, typeCcitt

Fields inherited from class com.itextpdf.io.image.ImageData

bpc, colorEncodingComponentsNumber, colorTransform, data, decode, decodeParms, deflated, dpiX, dpiY, filter, height, imageAttributes, imageMask, imageSize, interpolation, inverted, mask, mySerialId, originalType, profile, rotation, transparency, url, width, XYRatio

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	PngImageData(byte[] bytes)	Creates PNG image data from encoded bytes.
protected	PngImageData(URL url)	Creates PNG image data to be loaded from a URL.

Method Summary

Modifier and Type	Method	Description
byte[]	getColorPalette()	Gets the indexed-color palette.
int	getColorType()	Gets the PNG color type.
float	getGamma()	Gets the PNG gamma value.
PngChromaticities	getPngChromaticities()	Gets PNG chromaticity data.
boolean	isGrayscaleImage()	Checks whether the PNG color type has no color components.
boolean	isHasCHRM()	Checks whether PNG chromaticity data is available.
boolean	isIndexed()	Checks whether the PNG uses indexed color.
void	setColorPalette(byte[] colorPalette)	Sets the indexed-color palette.
void	setColorType(int colorType)	Sets the PNG color type.
void	setGamma(float gamma)	Sets the PNG gamma value.
void	setPngChromaticities(PngChromaticities pngChromaticities)	Sets PNG chromaticity data.

Methods inherited from class com.itextpdf.io.image.RawImageData

getTypeCcitt, isRawImage, setTypeCcitt

Methods inherited from class com.itextpdf.io.image.ImageData

canBeMask, canImageBeInline, getBpc, getColorEncodingComponentsNumber, getColorTransform, getData, getDecode, getDecodeParms, getDpiX, getDpiY, getFilter, getHeight, getImageAttributes, getImageMask, getOriginalType, getProfile, getRotation, getTransparency, getUrl, getWidth, getXYRatio, isDeflated, isInterpolation, isInverted, isMask, isSoftMask, loadData, makeMask, setBpc, setColorEncodingComponentsNumber, setColorTransform, setDecode, setDeflated, setDpi, setFilter, setHeight, setImageAttributes, setImageMask, setInterpolation, setInverted, setProfile, setRotation, setTransparency, setUrl, setWidth, setXYRatio

Methods inherited from class java.lang.Object

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

Constructor Details

PngImageData

             protected PngImageData
             (byte[] bytes)
            

Creates PNG image data from encoded bytes.

Parameters:

bytes - encoded PNG bytes; the array is retained

PngImageData

             protected PngImageData
             (URL url)
            

Creates PNG image data to be loaded from a URL.

Parameters:

url - source URL, not null

Method Details

getColorPalette

             public byte[] getColorPalette()
            

Gets the indexed-color palette.

Returns:

retained PNG palette bytes, or null

setColorPalette

             public void setColorPalette
             (byte[] colorPalette)
            

Sets the indexed-color palette.

Parameters:

colorPalette - PNG palette bytes to retain, or null

getGamma

             public float getGamma()
            

Gets the PNG gamma value.

Returns:

gamma value

setGamma

             public void setGamma
             (float gamma)
            

Sets the PNG gamma value.

Parameters:

gamma - gamma value

isHasCHRM

             public boolean isHasCHRM()
            

Checks whether PNG chromaticity data is available.

Returns:

true when chromaticity data is present

getPngChromaticities

             public PngChromaticities getPngChromaticities()
            

Gets PNG chromaticity data.

Returns:

chromaticity data, or null

setPngChromaticities

             public void setPngChromaticities
             (PngChromaticities pngChromaticities)
            

Sets PNG chromaticity data.

Parameters:

pngChromaticities - chromaticity data, or null

getColorType

             public int getColorType()
            

Gets the PNG color type.

Returns:

PNG color-type value

setColorType

             public void setColorType
             (int colorType)
            

Sets the PNG color type.

Parameters:

colorType - PNG color-type value

isIndexed

             public boolean isIndexed()
            

Checks whether the PNG uses indexed color.

Returns:

true for color type 3

isGrayscaleImage

             public boolean isGrayscaleImage()
            

Checks whether the PNG color type has no color components.

Returns:

true for grayscale color types