Java(TM) 2 Platform, Standard Edition, v1.2.2 API Specification: Interface ImageConsumer - JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档

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java.awt.image
Interface ImageConsumer

All Known Implementing Classes:: ImageFilter, PixelGrabber

public interface ImageConsumer

The interface for objects expressing interest in image data through the ImageProducer interfaces. When a consumer is added to an image producer, the producer delivers all of the data about the image using the method calls defined in this interface.

See Also:: ImageProducer

Field Summary

static int COMPLETESCANLINES
          The pixels will be delivered in (multiples of) complete scanlines at a time.

static int IMAGEABORTED
          The image creation process was deliberately aborted.

static int IMAGEERROR
          An error was encountered while producing the image.

static int RANDOMPIXELORDER
          The pixels will be delivered in a random order.

static int SINGLEFRAME
          The image contain a single static image.

static int SINGLEFRAMEDONE
          One frame of the image is complete but there are more frames to be delivered.

static int SINGLEPASS
          The pixels will be delivered in a single pass.

static int STATICIMAGEDONE
          The image is complete and there are no more pixels or frames to be delivered.

static int TOPDOWNLEFTRIGHT
          The pixels will be delivered in top-down, left-to-right order.

Method Summary

void imageComplete(int status)
          The imageComplete method is called when the ImageProducer is finished delivering all of the pixels that the source image contains, or when a single frame of a multi-frame animation has been completed, or when an error in loading or producing the image has occured.

void setColorModel(ColorModel model)
          The ColorModel object used for the majority of the pixels reported using the setPixels method calls.

void setDimensions(int width, int height)
          The dimensions of the source image are reported using the setDimensions method call.

void setHints(int hintflags)
          The ImageProducer can deliver the pixels in any order, but the ImageConsumer may be able to scale or convert the pixels to the destination ColorModel more efficiently or with higher quality if it knows some information about how the pixels will be delivered up front.

void setPixels(int x, int y, int w, int h, ColorModel model, byte[] pixels, int off, int scansize)
          The pixels of the image are delivered using one or more calls to the setPixels method.

void setPixels(int x, int y, int w, int h, ColorModel model, int[] pixels, int off, int scansize)
          The pixels of the image are delivered using one or more calls to the setPixels method.

void setProperties(Hashtable props)
          Sets the extensible list of properties associated with this image.

Field Detail

RANDOMPIXELORDER

public static final int RANDOMPIXELORDER

The pixels will be delivered in a random order. This tells the ImageConsumer not to use any optimizations that depend on the order of pixel delivery, which should be the default assumption in the absence of any call to the setHints method.

See Also:: setHints(int)

TOPDOWNLEFTRIGHT

public static final int TOPDOWNLEFTRIGHT

The pixels will be delivered in top-down, left-to-right order.

See Also:: setHints(int)

COMPLETESCANLINES

public static final int COMPLETESCANLINES

The pixels will be delivered in (multiples of) complete scanlines at a time.

See Also:: setHints(int)

SINGLEPASS

public static final int SINGLEPASS

The pixels will be delivered in a single pass. Each pixel will appear in only one call to any of the setPixels methods. An example of an image format which does not meet this criterion is a progressive JPEG image which defines pixels in multiple passes, each more refined than the previous.

See Also:: setHints(int)

SINGLEFRAME

public static final int SINGLEFRAME

The image contain a single static image. The pixels will be defined in calls to the setPixels methods and then the imageComplete method will be called with the STATICIMAGEDONE flag after which no more image data will be delivered. An example of an image type which would not meet these criteria would be the output of a video feed, or the representation of a 3D rendering being manipulated by the user. The end of each frame in those types of images will be indicated by calling imageComplete with the SINGLEFRAMEDONE flag.

See Also:: setHints(int), imageComplete(int)

IMAGEERROR

public static final int IMAGEERROR

An error was encountered while producing the image.

See Also:: imageComplete(int)

SINGLEFRAMEDONE

public static final int SINGLEFRAMEDONE

One frame of the image is complete but there are more frames to be delivered.

See Also:: imageComplete(int)

STATICIMAGEDONE

public static final int STATICIMAGEDONE

The image is complete and there are no more pixels or frames to be delivered.

See Also:: imageComplete(int)

IMAGEABORTED

public static final int IMAGEABORTED

The image creation process was deliberately aborted.

See Also:: imageComplete(int)

Method Detail

setDimensions

public void setDimensions(int width,
                          int height)

The dimensions of the source image are reported using the setDimensions method call.

setProperties

public void setProperties(Hashtable props)

Sets the extensible list of properties associated with this image.

setColorModel

public void setColorModel(ColorModel model)

The ColorModel object used for the majority of the pixels reported using the setPixels method calls. Note that each set of pixels delivered using setPixels contains its own ColorModel object, so no assumption should be made that this model will be the only one used in delivering pixel values. A notable case where multiple ColorModel objects may be seen is a filtered image when for each set of pixels that it filters, the filter determines whether the pixels can be sent on untouched, using the original ColorModel, or whether the pixels should be modified (filtered) and passed on using a ColorModel more convenient for the filtering process.

See Also:: ColorModel

setHints

public void setHints(int hintflags)

The ImageProducer can deliver the pixels in any order, but the ImageConsumer may be able to scale or convert the pixels to the destination ColorModel more efficiently or with higher quality if it knows some information about how the pixels will be delivered up front. The setHints method should be called before any calls to any of the setPixels methods with a bit mask of hints about the manner in which the pixels will be delivered. If the ImageProducer does not follow the guidelines for the indicated hint, the results are undefined.

setPixels

public void setPixels(int x,
                      int y,
                      int w,
                      int h,
                      ColorModel model,
                      byte[] pixels,
                      int off,
                      int scansize)

The pixels of the image are delivered using one or more calls to the setPixels method. Each call specifies the location and size of the rectangle of source pixels that are contained in the array of pixels. The specified ColorModel object should be used to convert the pixels into their corresponding color and alpha components. Pixel (m,n) is stored in the pixels array at index (n * scansize + m + off). The pixels delivered using this method are all stored as bytes.

See Also:: ColorModel

setPixels

public void setPixels(int x,
                      int y,
                      int w,
                      int h,
                      ColorModel model,
                      int[] pixels,
                      int off,
                      int scansize)

See Also:: ColorModel

imageComplete

public void imageComplete(int status)

The imageComplete method is called when the ImageProducer is finished delivering all of the pixels that the source image contains, or when a single frame of a multi-frame animation has been completed, or when an error in loading or producing the image has occured. The ImageConsumer should remove itself from the list of consumers registered with the ImageProducer at this time, unless it is interested in successive frames.

See Also:: ImageProducer.removeConsumer(java.awt.image.ImageConsumer)

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Field Summary
`static int`	`COMPLETESCANLINES` The pixels will be delivered in (multiples of) complete scanlines at a time.
`static int`	`IMAGEABORTED` The image creation process was deliberately aborted.
`static int`	`IMAGEERROR` An error was encountered while producing the image.
`static int`	`RANDOMPIXELORDER` The pixels will be delivered in a random order.
`static int`	`SINGLEFRAME` The image contain a single static image.
`static int`	`SINGLEFRAMEDONE` One frame of the image is complete but there are more frames to be delivered.
`static int`	`SINGLEPASS` The pixels will be delivered in a single pass.
`static int`	`STATICIMAGEDONE` The image is complete and there are no more pixels or frames to be delivered.
`static int`	`TOPDOWNLEFTRIGHT` The pixels will be delivered in top-down, left-to-right order.

Method Summary
`void`	`imageComplete(int status)` The imageComplete method is called when the ImageProducer is finished delivering all of the pixels that the source image contains, or when a single frame of a multi-frame animation has been completed, or when an error in loading or producing the image has occured.
`void`	`setColorModel(ColorModel model)` The ColorModel object used for the majority of the pixels reported using the setPixels method calls.
`void`	`setDimensions(int width, int height)` The dimensions of the source image are reported using the setDimensions method call.
`void`	`setHints(int hintflags)` The ImageProducer can deliver the pixels in any order, but the ImageConsumer may be able to scale or convert the pixels to the destination ColorModel more efficiently or with higher quality if it knows some information about how the pixels will be delivered up front.
`void`	`setPixels(int x, int y, int w, int h, ColorModel model, byte[] pixels, int off, int scansize)` The pixels of the image are delivered using one or more calls to the setPixels method.
`void`	`setPixels(int x, int y, int w, int h, ColorModel model, int[] pixels, int off, int scansize)` The pixels of the image are delivered using one or more calls to the setPixels method.
`void`	`setProperties(Hashtable props)` Sets the extensible list of properties associated with this image.

Java(TM) 2 Platform, Standard Edition, v1.2.2 API Specification: Interface ImageConsumer - JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档

java.awt.image Interface ImageConsumer

RANDOMPIXELORDER

TOPDOWNLEFTRIGHT

COMPLETESCANLINES

SINGLEPASS

SINGLEFRAME

IMAGEERROR

SINGLEFRAMEDONE

STATICIMAGEDONE

IMAGEABORTED

setDimensions

setProperties

setColorModel

setHints

setPixels

setPixels

imageComplete

java.awt.image
Interface ImageConsumer