/*
* Copyright (c) 1998, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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 in the LICENSE file that
* accompanied this code).
*
* 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.java2d.pipe;
/**
* This interface defines a general method for iterating through the
* rectangular "spans" that represent the interior of a filled path.
* <p>
* There can be many kinds of span iterators used in the rendering
* pipeline, the most basic being an iterator that scan converts a
* path defined by any PathIterator, or an nested iterator which
* intersects another iterator's spans with a clip region.
* Other iterators can be created for scan converting some of the
* primitive shapes more explicitly for speed or quality.
*
* @author Jim Graham
*/
public interface SpanIterator {
/**
* This method returns the bounding box of the spans that the
* iterator will be returning.
* The array must be of length at least 4 and upon return, it
* will be filled with the values:
* <pre>
* {PathMinX, PathMinY, PathMaxX, PathMaxY}.
* </pre>
*/
public void getPathBox(int[] pathbox);
/**
* This method constrains the spans returned by nextSpan() to the
* rectangle whose bounds are given.
*/
public void intersectClipBox(int lox, int loy, int hix, int hiy);
/**
* This method returns the next span in the shape being iterated.
* The array must be of length at least 4 and upon return, it
* will be filled with the values:
* <pre>
* {SpanMinX, SpanMinY, SpanMaxX, SpanMaxY}.
* </pre>
*/
public boolean nextSpan(int[] spanbox);
/**
* This method tells the iterator that it may skip all spans
* whose Y range is completely above the indicated Y coordinate.
* This method is used to provide feedback from the caller when
* clipping prevents the display of any data in a given Y range.
* Typically it will only be called when this iterator has returned
* a span whose MaxY coordinate is less than the indicated Y and
* the calling mechanism wants to avoid unnecessary iteration work.
* While this request could technically be ignored (i.e. a NOP),
* doing so could potentially cause the caller to make this callback
* for each span that is being skipped.
*/
public void skipDownTo(int y);
/**
* This method returns a native pointer to a function block that
/**代码未完, 请加载全部代码(NowJava.com).**/