/*
* @(#)ImageConsumer.java 1.21 06/10/10
*
* Copyright 1990-2008 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 only, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License version 2 for more details (a copy is
* included at /legal/license.txt).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this work; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*
*/
package java.awt.image;
import java.util.Hashtable;
/**
* 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 ImageProducer
*
* @version 1.17 08/19/02
* @author Jim Graham
*/
public interface ImageConsumer {
/**
* The dimensions of the source image are reported using the
* setDimensions method call.
*/
void setDimensions(int width, int height);
/**
* Sets the extensible list of properties associated with this image.
*/
void setProperties(Hashtable props);
/**
* 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 ColorModel
*/
void setColorModel(ColorModel model);
/**
* 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.
*/
void setHints(int hintflags);
/**
* 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 #setHints
*/
int RANDOMPIXELORDER = 1;
/**
* The pixels will be delivered in top-down, left-to-right order.
* @see #setHints
*/
int TOPDOWNLEFTRIGHT = 2;
/**
* The pixels will be delivered in (multiples of) complete scanlines
* at a time.
* @see #setHints
*/
int COMPLETESCANLINES = 4;
/**
* 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 #setHints
*/
int SINGLEPASS = 8;
/**
* 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 #setHints
* @see #imageComplete
*/
int SINGLEFRAME = 16;
/**
* 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 ColorModel
*/
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 ints.
* @see ColorModel
*/
void setPixels(int x, int y, int w, int h,
ColorModel model, int pixels[], int off, int scansize);
/**
* 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 ImageProducer#removeConsumer
*/
void imageComplete(int status);
/**
* An error was encountered while producing the image.
* @see #imageComplete
*/
int IMAGEERROR = 1;
/**
* One frame of the image is complete but there are more frames
* to be delivered.
* @see #imageComplete
*/
int SINGLEFRAMEDONE = 2;
/**
* The image is complete and there are no more pixels or frames
* to be delivered.
* @see #imageComplete
*/
int STATICIMAGEDONE = 3;
/**
* The image creation process was deliberately aborted.
* @see #imageComplete
*/
int IMAGEABORTED = 4;
}