Package com.openhtmltopdf.pdfboxout.visualtester

Class PdfVisualTester

java.lang.Object

com.openhtmltopdf.pdfboxout.visualtester.PdfVisualTester

public class PdfVisualTester
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	PdfVisualTester.PdfCompareResult
static enum	PdfVisualTester.ProblemType
static class	PdfVisualTester.TestImage

Field Summary

Fields

Modifier and Type	Field	Description
private static final int	LEFT_MARGIN_PX
private static final int	LINE_HEIGHT_PX
private static final BufferedImage	ONE_PX_IMAGE

Constructor Summary

Constructors

Constructor	Description
PdfVisualTester()

Method Summary

Modifier and Type	Method	Description
private static int	calcCombinedIntensity(int element)	Calculate the combined intensity of a pixel and normalizes it to a value of at most 255.
private static int	color(int r, int g, int b)
static List<PdfVisualTester.PdfCompareResult>	comparePdfDocuments(byte[] expected, byte[] actual, String testName, boolean keepSameImages)	Compares two PDF documents by rendering each page to an image and comparing pixel by pixel.
static BufferedImage	createDiffImage(BufferedImage img1, BufferedImage img2)
private static int	fade(int i)
private static int	fadeElement(int i)
private static int	getActualPixel(BufferedImage img, int x, int y)
private static int	getElement(int expectedElement, int actualElement)
private static int	getExpectedPixel(BufferedImage img, int x, int y)
private static boolean	isImageDifferent(BufferedImage imgExpected, BufferedImage imgActual)	Gets the data buffer of each image and compares.
private static int	levelIntensity(int darkness, int maxIntensity)	Levels the color intensity to at least 50 and at most maxIntensity.

Methods inherited from class java.lang.Object

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

Field Details

LEFT_MARGIN_PX

private static final int LEFT_MARGIN_PX

See Also:

• Constant Field Values

LINE_HEIGHT_PX

private static final int LINE_HEIGHT_PX

See Also:

• Constant Field Values

ONE_PX_IMAGE

private static final BufferedImage ONE_PX_IMAGE

Constructor Details

PdfVisualTester

public PdfVisualTester()

Method Details

comparePdfDocuments

public static List<PdfVisualTester.PdfCompareResult> comparePdfDocuments(byte[] expected,
 byte[] actual,
 String testName,
 boolean keepSameImages)
                                                                  throws IOException

Compares two PDF documents by rendering each page to an image and comparing pixel by pixel.

Parameters:

expected -

actual -

testName -

keepSameImages - Whether to return the images in the case they are good (ie. the same).

Returns:

A list of PdfVisualTester.PdfCompareResult instances describing differences.

Throws:

Exception

IOException

isImageDifferent

private static boolean isImageDifferent(BufferedImage imgExpected,
 BufferedImage imgActual)

Gets the data buffer of each image and compares. NOTE: May be an expensive (memory and CPU) operation for large images.

Parameters:

imgExpected -

imgActual -

Returns:

whether imgExpected is different image compared to imgActual

createDiffImage

public static BufferedImage createDiffImage(BufferedImage img1,
 BufferedImage img2)

getExpectedPixel

private static int getExpectedPixel(BufferedImage img,
 int x,
 int y)

getActualPixel

private static int getActualPixel(BufferedImage img,
 int x,
 int y)

getElement

private static int getElement(int expectedElement,
 int actualElement)

levelIntensity

private static int levelIntensity(int darkness,
 int maxIntensity)

Levels the color intensity to at least 50 and at most maxIntensity.

Parameters:

darkness - color component to level

maxIntensity - highest possible intensity cut off

Returns:

A value that is at least 50 and at most maxIntensity

calcCombinedIntensity

private static int calcCombinedIntensity(int element)

Calculate the combined intensity of a pixel and normalizes it to a value of at most 255.

Parameters:

element -

Returns:

color

private static int color(int r,
 int g,
 int b)

fadeElement

private static int fadeElement(int i)

fade

private static int fade(int i)