/* * Copyright (c) 1998, 2007, 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; import java.awt.geom.PathIterator;import java.awt.Rectangle;import sun.awt.geom.PathConsumer2D; /** * This class can iterate individual span elements generated by scan * converting a Shape. * This particular implementation flattens the incoming path and then * performs simple polygon tracing to calculate the spans. * * Note that this class holds pointers to native data which must be * disposed. It is not marked as finalizable since it is intended * to be very lightweight and finalization is a comparitively expensive * procedure. The caller must specifically use try{} finally{} to * manually ensure that the object is disposed after use, otherwise * native data structures might be leaked. * * Here is a code sample for using this class: * * public void fillShape(Shape s, Rectangle clipRect) { * ShapeSpanIterator ssi = new ShapeSpanIterator(false); * try { * ssi.setOutputArea(clipRect); * ssi.appendPath(s.getPathIterator(null)); * int spanbox[] = new int[4]; * while (ssi.nextSpan(spanbox)) { * int x = spanbox[0]; * int y = spanbox[1]; * int w = spanbox[2] - x; * int h = spanbox[3] - y; * fillRect(x, y, w, h); * } * } finally { * ssi.dispose(); * } * } */public final class ShapeSpanIterator implements SpanIterator, PathConsumer2D{ long pData; static { initIDs(); } public static native void initIDs(); public ShapeSpanIterator(boolean adjust) { setNormalize(adjust); } /* * Appends the geometry and winding rule from the indicated * path iterator. */ public void appendPath(PathIterator pi) { float coords[] = new float[6]; setRule(pi.getWindingRule()); while (!pi.isDone()) { addSegment(pi.currentSegment(coords), coords); pi.next(); } pathDone(); } /* * Appends the geometry from the indicated set of polygon points. */ public native void appendPoly(int xPoints[], int yPoints[], int nPoints, int xoff, int yoff); /* * Sets the normalization flag so that incoming data is * adjusted to nearest (0.25, 0.25) subpixel position. */ private native void setNormalize(boolean adjust); /* * Sets the rectangle of interest for storing and returning * span segments. */ public void setOutputAreaXYWH(int x, int y, int w, int h) { setOutputAreaXYXY(x, y, Region.dimAdd(x, w), Region.dimAdd(y, h)); } /* * Sets the rectangle of interest for storing and returning * span segments. */ public native void setOutputAreaXYXY(int lox, int loy, int hix, int hiy); /* * Sets the rectangle of interest for storing and returning * span segments to the specified Rectangle. */ public void setOutputArea(Rectangle r) { setOutputAreaXYWH(r.x, r.y, r.width, r.height); } /* * Sets the rectangle of interest for storing and returning * span segments to the bounds of the specified Region. */ public void setOutputArea(Region r) { setOutputAreaXYXY(r.lox, r.loy, r.hix, r.hiy); } /* * Sets the winding rule in the native data structures. */ public native void setRule(int rule); /* * Adds a single PathIterator segment to the internal list of * path element structures. */ public native void addSegment(int type, float coords[]); /* * Gets the bbox of the available path segments, clipped to the * OutputArea. */ public native void getPathBox(int pathbox[]); /* * Intersects the path box with the given bbox. * Returned spans are clipped to this region, or discarded * altogether if they lie outside it. */ public native void intersectClipBox(int lox, int loy, int hix, int hiy); /* * Fetches the next span that needs to be operated on. * If the return value is false then there are no more spans. */ public native 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. */ public native void skipDownTo(int y); /** * This method returns a native pointer to a function block that * can be used by a native method to perform the same iteration * cycle that the above methods provide while avoiding upcalls to * the Java object. * The definition of the structure whose pointer is returned by * this method is defined in: * <pre> * src/share/native/sun/java2d/pipe/SpanIterator.h * </pre> */ public native long getNativeIterator(); /* * Cleans out all internal data structures. */ public native void dispose(); public native void moveTo(float x, float y); public native void lineTo(float x, float y); public native void quadTo(float x1, float y1, float x2, float y2); public native void curveTo(float x1, float y1, float x2, float y2, float x3, float y3); public native void closePath(); public native void pathDone(); public native long getNativeConsumer();}
/*
* Copyright (c) 1998, 2007, 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;
import java.awt.geom.PathIterator;
import java.awt.Rectangle;
import sun.awt.geom.PathConsumer2D;
/**
* This class can iterate individual span elements generated by scan
* converting a Shape.
* This particular implementation flattens the incoming path and then
* performs simple polygon tracing to calculate the spans.
*
* Note that this class holds pointers to native data which must be
* disposed. It is not marked as finalizable since it is intended
* to be very lightweight and finalization is a comparitively expensive
* procedure. The caller must specifically use try{} finally{} to
* manually ensure that the object is disposed after use, otherwise
* native data structures might be leaked.
*
* Here is a code sample for using this class:
*
* public void fillShape(Shape s, Rectangle clipRect) {
* ShapeSpanIterator ssi = new ShapeSpanIterator(false);
* try {
* ssi.setOutputArea(clipRect);
* ssi.appendPath(s.getPathIterator(null));
* int spanbox[] = new int[4];
* while (ssi.nextSpan(spanbox)) {
* int x = spanbox[0];
* int y = spanbox[1];
* int w = spanbox[2] - x;
* int h = spanbox[3] - y;
* fillRect(x, y, w, h);
* }
* } finally {
* ssi.dispose();
* }
* }
*/
public final class ShapeSpanIterator
implements SpanIterator, PathConsumer2D
{
long pData;
static {
initIDs();
}
public static native void initIDs();
public ShapeSpanIterator(boolean adjust) {
setNormalize(adjust);
}
/*
* Appends the geometry and winding rule from the indicated
* path iterator.
*/
public void appendPath(PathIterator pi) {
float coords[] = new float[6];
setRule(pi.getWindingRule());
while (!pi.isDone()) {
addSegment(pi.currentSegment(coords), coords);
pi.next();
}
pathDone();
}
/*
* Appends the geometry from the indicated set of polygon points.
*/
public native void appendPoly(int xPoints[], int yPoints[], int nPoints,
int xoff, int yoff);
/*
* Sets the normalization flag so that incoming data is
* adjusted to nearest (0.25, 0.25) subpixel position.
*/
private native void setNormalize(boolean adjust);
/*
* Sets the rectangle of interest for storing and returning
* span segments.
*/
public void setOutputAreaXYWH(int x, int y, int w, int h) {
setOutputAreaXYXY(x, y, Region.dimAdd(x, w), Region.dimAdd(y, h));
}
/*
* Sets the rectangle of interest for storing and returning
* span segments.
*/
public native void setOutputAreaXYXY(int lox, int loy, int hix, int hiy);
/*
* Sets the rectangle of interest for storing and returning
* span segments to the specified Rectangle.
*/
public void setOutputArea(Rectangle r) {
setOutputAreaXYWH(r.x, r.y, r.width, r.height);
}
/*
* Sets the rectangle of interest for storing and returning
* span segments to the bounds of the specified Region.
*/
public void setOutputArea(Region r) {
setOutputAreaXYXY(r.lox, r.loy, r.hix, r.hiy);
}
/*
* Sets the winding rule in the native data structures.
*/
public native void setRule(int rule);
/*
* Adds a single PathIterator segment to the internal list of
* path element structures.
*/
public native void addSegment(int type, float coords[]);
/*
* Gets the bbox of the available path segments, clipped to the
* OutputArea.
*/
public native void getPathBox(int pathbox[]);
/*
* Intersects the path box with the given bbox.
* Returned spans are clipped to this region, or discarded
* altogether if they lie outside it.
*/
public native void intersectClipBox(int lox, int loy, int hix, int hiy);
/*
* Fetches the next span that needs to be operated on.
* If the return value is false then there are no more spans.
*/
public native 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.
*/
public native void skipDownTo(int y);
/**
* This method returns a native pointer to a function block that
* can be used by a native method to perform the same iteration
* cycle that the above methods provide while avoiding upcalls to
* the Java object.
* The definition of the structure whose pointer is returned by
* this method is defined in:
* <pre>
* src/share/native/sun/java2d/pipe/SpanIterator.h
* </pre>
*/
public native long getNativeIterator();
/*
* Cleans out all internal data structures.
*/
public native void dispose();
public native void moveTo(float x, float y);
public native void lineTo(float x, float y);
public native void quadTo(float x1, float y1,
float x2, float y2);
public native void curveTo(float x1, float y1,
float x2, float y2,
float x3, float y3);
public native void closePath();
public native void pathDone();
public native long getNativeConsumer();
}