Class NativeImageLoader

java.lang.Object

org.eclipse.swt.internal.NativeImageLoader

public class NativeImageLoader
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
private static final int	PNG_INTERLACE_METHOD_OFFSET	If the 29th byte of the PNG file is not zero, then it is interlaced.

Constructor Summary

Constructors

Constructor	Description
NativeImageLoader()

Method Summary

Modifier and Type	Method	Description
private static int	getImageFormat(long loader)	Return the type of file from which the image was read by inspecting GdkPixbufFormat from GdkPixbufLoader It is expressed as one of the following values: SWT.IMAGE_BMP Windows BMP file format, no compression SWT.IMAGE_BMP_RLE Windows BMP file format, RLE compression if appropriate SWT.IMAGE_GIF GIF file format SWT.IMAGE_ICO Windows ICO file format SWT.IMAGE_JPEG JPEG file format SWT.IMAGE_PNG PNG file format SWT.IMAGE_TIFF TIFF file format
private static boolean	isInterlacedPNG(byte[] imageAsByteArray)	Return true if the image is an interlaced PNG file.
static ImageData	load(InputStream streamAtZoom, ImageLoader imageLoader, int width, int height)
static List<DPIUtil.ElementAtZoom<ImageData>>	load(DPIUtil.ElementAtZoom<InputStream> streamAtZoom, ImageLoader imageLoader, int targetZoom)
private static ImageData	pixbufToImageData(long pixbuf)	Convert GdkPixbuf pointer to Java object ImageData
static void	save(OutputStream stream, int format, ImageLoader imageLoader)

Methods inherited from class Object

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

Field Details

PNG_INTERLACE_METHOD_OFFSET

private static final int PNG_INTERLACE_METHOD_OFFSET

If the 29th byte of the PNG file is not zero, then it is interlaced.

See Also:

• Constant Field Values

Constructor Details

NativeImageLoader

public NativeImageLoader()

Method Details

load

public static List<DPIUtil.ElementAtZoom<ImageData>> load(DPIUtil.ElementAtZoom<InputStream> streamAtZoom,
 ImageLoader imageLoader,
 int targetZoom)

load

public static ImageData load(InputStream streamAtZoom,
 ImageLoader imageLoader,
 int width,
 int height)

isInterlacedPNG

private static boolean isInterlacedPNG(byte[] imageAsByteArray)

Return true if the image is an interlaced PNG file. This is used to check whether ImageLoaderEvent should be fired when loading images.

Returns:

true iff 29th byte of PNG files is not zero

getImageFormat

private static int getImageFormat(long loader)

Return the type of file from which the image was read by inspecting GdkPixbufFormat from GdkPixbufLoader It is expressed as one of the following values:

SWT.IMAGE_BMP

Windows BMP file format, no compression

SWT.IMAGE_BMP_RLE

Windows BMP file format, RLE compression if appropriate

SWT.IMAGE_GIF

GIF file format

SWT.IMAGE_ICO

Windows ICO file format

SWT.IMAGE_JPEG

JPEG file format

SWT.IMAGE_PNG

PNG file format

SWT.IMAGE_TIFF

TIFF file format

pixbufToImageData

private static ImageData pixbufToImageData(long pixbuf)

Convert GdkPixbuf pointer to Java object ImageData

Returns:

ImageData with pixbuf data

save

public static void save(OutputStream stream,
 int format,
 ImageLoader imageLoader)