com.aspose.imaging.fileformats.djvu

Class DjvuPage

java.lang.Object

com.aspose.imaging.DisposableObject

com.aspose.imaging.DataStreamSupporter

com.aspose.imaging.Image

com.aspose.imaging.RasterImage

com.aspose.imaging.RasterCachedImage

com.aspose.imaging.fileformats.djvu.DjvuPage

All Implemented Interfaces:

IObjectWithBounds, IRasterImageArgb32PixelLoader, IRasterImageRawDataLoader, com.aspose.internal.IPixelsSaver, com.aspose.internal.progressmanagement.IProgressEventHandler, com.aspose.internal.progressmanagement.IProgressInformer, com.aspose.ms.System.IDisposable, Closeable, AutoCloseable

public class DjvuPage
extends RasterCachedImage

Djvu page class

Field Summary

Fields

Modifier and Type	Field and Description
static com.aspose.ms.lang.Event<OnPageExportedAction>	PageExportedAction Occurs when [page exported action].
com.aspose.java.StdEvent<com.aspose.ms.System.ComponentModel.PropertyChangedEventArgs>	PropertyChanged Occurs when a property value changes.

Method Summary

Modifier and Type	Method and Description
DjvuRaster	extractThumbnailImage() Extracts the thumbnail image from the Djvu page.
DjvuRaster	getBackgroundImage() Gets the background image.
int	getBitsPerPixel() Gets the image bits per pixel count.
DjvuRaster	getForegroundImage() Gets the foreground image for the page
DjvuRaster	getForegroundImage(int subsample) Gets the foreground image for the page
int	getHeight() Gets the height of the page
DjvuRaster	getImage() Gets the image.
int	getPageNumber() Gets the page number.
DjvuImage	getParentImage() Gets the parent image the page belongs to
String	getTextForLocation(Rectangle rect) Gets the text for the rectangle location
DjvuRaster	getTextImage() Gets the text image.
DjvuRaster	getTextImage(int subsample) Gets the text image.
DjvuRaster	getThumbnailImage() Gets or sets the thumbnail image for the page
int	getWidth() Gets the width of the page
boolean	isColor() Gets a value indicating whether this instance is color.
void	setThumbnailImage(DjvuRaster value) Gets or sets the thumbnail image for the page

Methods inherited from class com.aspose.imaging.RasterCachedImage

adjustBrightness, adjustContrast, adjustGamma, adjustGamma, binarizeBradley, binarizeBradley, binarizeFixed, binarizeOtsu, cacheData, crop, dither, grayscale, isCached, resize, resize, rotate, rotateFlip

Methods inherited from class com.aspose.imaging.RasterImage

crop, dither, filter, getArgb32Pixel, getDefaultArgb32Pixels, getDefaultPixels, getDefaultRawData, getDefaultRawData, getHorizontalResolution, getImageOpacity, getModifyDate, getPixel, getPremultiplyComponents, getRawCustomColorConverter, getRawDataFormat, getRawDataSettings, getRawFallbackIndex, getRawIndexedColorConverter, getRawLineSize, getSkewAngle, getTransparentColor, getUpdateXmpData, getUseRawData, getVerticalResolution, getXmpData, hasAlpha, hasTransparentColor, isRawDataAvailable, isUsePalette, loadArgb32Pixels, loadArgb64Pixels, loadCmyk32Pixels, loadCmykPixels, loadPartialArgb32Pixels, loadPartialPixels, loadPixels, loadRawData, loadRawData, normalizeAngle, normalizeAngle, readArgb32ScanLine, readScanLine, replaceColor, replaceColor, replaceNonTransparentColors, replaceNonTransparentColors, rotate, saveArgb32Pixels, saveCmyk32Pixels, saveCmykPixels, savePixels, saveRawData, setArgb32Pixel, setHorizontalResolution, setPalette, setPixel, setPremultiplyComponents, setRawCustomColorConverter, setRawFallbackIndex, setRawIndexedColorConverter, setResolution, setTransparentColor, setTransparentColor, setUpdateXmpData, setUseRawData, setVerticalResolution, setXmpData, toBitmap, writeArgb32ScanLine, writeScanLine

Methods inherited from class com.aspose.imaging.Image

canLoad, canLoad, canLoad, canLoad, canSave, create, create, create, getBackgroundColor, getBounds, getBufferSizeHint, getContainer, getDefaultOptions, getFileFormat, getFileFormat, getFileFormat, getFittingRectangle, getFittingRectangle, getInterruptMonitor, getOriginalOptions, getPalette, getProgressEventHandler, getProgressEventHandlerInfo, getProportionalHeight, getProportionalWidth, getSize, hasBackgroundColor, isAutoAdjustPalette, load, load, load, load, load, load, resize, resizeHeightProportionally, resizeHeightProportionally, resizeHeightProportionally, resizeWidthProportionally, resizeWidthProportionally, resizeWidthProportionally, save, save, save, save, save, save, save, save, setAutoAdjustPalette, setBackgroundColor, setBackgroundColor, setBufferSizeHint, setInterruptMonitor, setPalette

Methods inherited from class com.aspose.imaging.DataStreamSupporter

getDataStreamContainer, save, save, save

Methods inherited from class com.aspose.imaging.DisposableObject

close, dispose, getDisposed

Methods inherited from class java.lang.Object

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

Field Detail

PageExportedAction

public static final com.aspose.ms.lang.Event<OnPageExportedAction> PageExportedAction

Occurs when [page exported action].

PropertyChanged

public final com.aspose.java.StdEvent<com.aspose.ms.System.ComponentModel.PropertyChangedEventArgs> PropertyChanged

Occurs when a property value changes.

Method Detail

getBitsPerPixel

public int getBitsPerPixel()

Gets the image bits per pixel count.

Value: The image bits per pixel count.

Specified by:

getBitsPerPixel in class Image

Returns:

The image bits per pixel count.

getParentImage

public DjvuImage getParentImage()

Gets the parent image the page belongs to

Value: The document.

getWidth

public int getWidth()

Gets the width of the page

Value: The width.

Specified by:

getWidth in interface IObjectWithBounds

Specified by:

getWidth in class Image

Returns:

The image width.

getHeight

public int getHeight()

Gets the height of the page

Value: The height.

Specified by:

getHeight in interface IObjectWithBounds

Specified by:

getHeight in class Image

Returns:

The image height.

getImage

public DjvuRaster getImage()

Gets the image.

Value: The image.

getThumbnailImage

public DjvuRaster getThumbnailImage()

Gets or sets the thumbnail image for the page

Value: The thumbnail image.

setThumbnailImage

public void setThumbnailImage(DjvuRaster value)

Gets or sets the thumbnail image for the page

Value: The thumbnail image.

getPageNumber

public int getPageNumber()

Gets the page number.

Value: The page number.

Code example:

This example shows how to load a DJVU image from a file stream and print information about the pages.

String dir = "c:\\temp\\";

// Load a DJVU image from a file stream.
java.io.FileInputStream stream = new java.io.FileInputStream(dir + "sample.djvu");
try {
    com.aspose.imaging.fileformats.djvu.DjvuImage djvuImage = new com.aspose.imaging.fileformats.djvu.DjvuImage(stream);
    try {
        System.out.println("The total number of pages: " + djvuImage.getPages().length);
        System.out.println("The active page number:    " + djvuImage.getActivePage().getPageNumber());
        System.out.println("The first page number:     " + djvuImage.getFirstPage().getPageNumber());
        System.out.println("The last page number:      " + djvuImage.getLastPage().getPageNumber());

        for (com.aspose.imaging.fileformats.djvu.DjvuPage djvuPage : djvuImage.getPages()) {
            System.out.println("--------------------------------------------------");
            System.out.println("Page number:     " + djvuPage.getPageNumber());
            System.out.println("Page size:       " + djvuPage.getSize());
            System.out.println("Page raw format: " + djvuPage.getRawDataFormat());
        }
    } finally {
        djvuImage.dispose();
    }
} finally {
    stream.close();
}

//The output may look like this:
//The total number of pages: 2
//The active page number:    1
//The first page number:     1
//The last page number:      2
//--------------------------------------------------
//Page number:     1
//Page size:       { Width = 2481, Height = 3508}
//Page raw format: RgbIndexed1Bpp, used channels: 1
//--------------------------------------------------
//Page number:     2
//Page size:       { Width = 2481, Height = 3508}
//Page raw format: RgbIndexed1Bpp, used channels: 1

isColor

public boolean isColor()

Gets a value indicating whether this instance is color.

Value: true if this instance is color; otherwise, false.

getTextForLocation

public String getTextForLocation(Rectangle rect)

Gets the text for the rectangle location

Parameters:

rect - The location rect.

Returns:

Text found on location

getForegroundImage

public DjvuRaster getForegroundImage()

Gets the foreground image for the page

Returns:

Bitmap image

getForegroundImage

public DjvuRaster getForegroundImage(int subsample)

Gets the foreground image for the page

Parameters:

subsample - The subsample.

Returns:

Bitmap image

getTextImage

public DjvuRaster getTextImage()

Gets the text image.

Returns:

The bitmap

getTextImage

public DjvuRaster getTextImage(int subsample)

Gets the text image.

Parameters:

subsample - The subsample.

Returns:

The bitmap

getBackgroundImage

public DjvuRaster getBackgroundImage()

Gets the background image.

Returns:

The bitmap

extractThumbnailImage

public DjvuRaster extractThumbnailImage()

Extracts the thumbnail image from the Djvu page.

Returns:

The Djvu raster image.