Package eu.europa.esig.dss.pdf.pdfbox.visible.defaultdrawer

Class DefaultImageDrawerUtils

java.lang.Object

eu.europa.esig.dss.pdf.pdfbox.visible.defaultdrawer.DefaultImageDrawerUtils

public final class DefaultImageDrawerUtils
extends Object

Contains the util methods used by the eu.europa.esig.dss.pdf.pdfbox.visible.defaultdrawer.DefaultPdfBoxVisibleSignatureDrawer

Method Summary

Modifier and Type	Method	Description
static BufferedImage	createTextImage(SignatureImageParameters imageParameters, SignatureFieldDimensionAndPosition dimensionAndPosition, JavaDSSFontMetrics fontMetrics)	Creates an image representing the specified text
static void	initRendering(Graphics2D g)	Sets the preferred image creation parameters to improve the rendering
static BufferedImage	mergeImages(BufferedImage image, BufferedImage textImage, SignatureFieldDimensionAndPosition dimensionAndPosition, SignatureImageParameters imageParameters)	Creates the final image, by merging the given image and textImage according to the provided parameters
static BufferedImage	rotate(BufferedImage image, double angle)	Rotates the provided image to the given angle
static BufferedImage	toBufferedImage(DSSDocument imageDocument)	Reads and converts the given image document to a BufferedImage

Methods inherited from class java.lang.Object

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

Method Details

createTextImage

public static BufferedImage createTextImage(SignatureImageParameters imageParameters,
 SignatureFieldDimensionAndPosition dimensionAndPosition,
 JavaDSSFontMetrics fontMetrics)

Creates an image representing the specified text

Parameters:

imageParameters - SignatureImageParameters to use

dimensionAndPosition - SignatureFieldDimensionAndPosition

fontMetrics - JavaDSSFontMetrics

Returns:

BufferedImage of the text picture

toBufferedImage

public static BufferedImage toBufferedImage(DSSDocument imageDocument)

Reads and converts the given image document to a BufferedImage

Parameters:

imageDocument - BufferedImage

Returns:

BufferedImage

initRendering

public static void initRendering(Graphics2D g)

Sets the preferred image creation parameters to improve the rendering

Parameters:

g - Graphics2D to set

mergeImages

public static BufferedImage mergeImages(BufferedImage image,
 BufferedImage textImage,
 SignatureFieldDimensionAndPosition dimensionAndPosition,
 SignatureImageParameters imageParameters)

Creates the final image, by merging the given image and textImage according to the provided parameters

Parameters:

image - BufferedImage the image picture

textImage - BufferedImage the rasterized text

dimensionAndPosition - SignatureFieldDimensionAndPosition

imageParameters - SignatureImageParameters

Returns:

BufferedImage

rotate

public static BufferedImage rotate(BufferedImage image,
 double angle)

Rotates the provided image to the given angle

Parameters:

image - BufferedImage to rotate

angle - the rotation angle

Returns:

rotated BufferedImage