Java example source code file (LoopPipe.java)
The LoopPipe.java Java example source code
/*
* Copyright (c) 1999, 2011, 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
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package sun.java2d.pipe;
import java.awt.Font;
import java.awt.Shape;
import java.awt.BasicStroke;
import java.awt.Polygon;
import java.awt.geom.AffineTransform;
import java.awt.geom.PathIterator;
import java.awt.geom.RoundRectangle2D;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Arc2D;
import java.awt.geom.IllegalPathStateException;
import java.awt.geom.Path2D;
import java.awt.font.GlyphVector;
import sun.java2d.SunGraphics2D;
import sun.java2d.SurfaceData;
import sun.java2d.loops.FontInfo;
import sun.java2d.loops.DrawPolygons;
import sun.java2d.loops.FillParallelogram;
import sun.java2d.loops.DrawParallelogram;
import sun.awt.SunHints;
public class LoopPipe
implements PixelDrawPipe,
PixelFillPipe,
ParallelogramPipe,
ShapeDrawPipe,
LoopBasedPipe
{
final static RenderingEngine RenderEngine = RenderingEngine.getInstance();
public void drawLine(SunGraphics2D sg2d,
int x1, int y1, int x2, int y2)
{
int tX = sg2d.transX;
int tY = sg2d.transY;
sg2d.loops.drawLineLoop.DrawLine(sg2d, sg2d.getSurfaceData(),
x1 + tX, y1 + tY,
x2 + tX, y2 + tY);
}
public void drawRect(SunGraphics2D sg2d,
int x, int y, int width, int height)
{
sg2d.loops.drawRectLoop.DrawRect(sg2d, sg2d.getSurfaceData(),
x + sg2d.transX,
y + sg2d.transY,
width, height);
}
public void drawRoundRect(SunGraphics2D sg2d,
int x, int y, int width, int height,
int arcWidth, int arcHeight)
{
sg2d.shapepipe.draw(sg2d,
new RoundRectangle2D.Float(x, y, width, height,
arcWidth, arcHeight));
}
public void drawOval(SunGraphics2D sg2d,
int x, int y, int width, int height)
{
sg2d.shapepipe.draw(sg2d, new Ellipse2D.Float(x, y, width, height));
}
public void drawArc(SunGraphics2D sg2d,
int x, int y, int width, int height,
int startAngle, int arcAngle)
{
sg2d.shapepipe.draw(sg2d, new Arc2D.Float(x, y, width, height,
startAngle, arcAngle,
Arc2D.OPEN));
}
public void drawPolyline(SunGraphics2D sg2d,
int xPoints[], int yPoints[],
int nPoints)
{
int nPointsArray[] = { nPoints };
sg2d.loops.drawPolygonsLoop.DrawPolygons(sg2d, sg2d.getSurfaceData(),
xPoints, yPoints,
nPointsArray, 1,
sg2d.transX, sg2d.transY,
false);
}
public void drawPolygon(SunGraphics2D sg2d,
int xPoints[], int yPoints[],
int nPoints)
{
int nPointsArray[] = { nPoints };
sg2d.loops.drawPolygonsLoop.DrawPolygons(sg2d, sg2d.getSurfaceData(),
xPoints, yPoints,
nPointsArray, 1,
sg2d.transX, sg2d.transY,
true);
}
public void fillRect(SunGraphics2D sg2d,
int x, int y, int width, int height)
{
sg2d.loops.fillRectLoop.FillRect(sg2d, sg2d.getSurfaceData(),
x + sg2d.transX,
y + sg2d.transY,
width, height);
}
public void fillRoundRect(SunGraphics2D sg2d,
int x, int y, int width, int height,
int arcWidth, int arcHeight)
{
sg2d.shapepipe.fill(sg2d,
new RoundRectangle2D.Float(x, y, width, height,
arcWidth, arcHeight));
}
public void fillOval(SunGraphics2D sg2d,
int x, int y, int width, int height)
{
sg2d.shapepipe.fill(sg2d, new Ellipse2D.Float(x, y, width, height));
}
public void fillArc(SunGraphics2D sg2d,
int x, int y, int width, int height,
int startAngle, int arcAngle)
{
sg2d.shapepipe.fill(sg2d, new Arc2D.Float(x, y, width, height,
startAngle, arcAngle,
Arc2D.PIE));
}
public void fillPolygon(SunGraphics2D sg2d,
int xPoints[], int yPoints[],
int nPoints)
{
ShapeSpanIterator sr = getFillSSI(sg2d);
try {
sr.setOutputArea(sg2d.getCompClip());
sr.appendPoly(xPoints, yPoints, nPoints, sg2d.transX, sg2d.transY);
fillSpans(sg2d, sr);
} finally {
sr.dispose();
}
}
public void draw(SunGraphics2D sg2d, Shape s) {
if (sg2d.strokeState == SunGraphics2D.STROKE_THIN) {
Path2D.Float p2df;
int transX;
int transY;
if (sg2d.transformState <= SunGraphics2D.TRANSFORM_INT_TRANSLATE) {
if (s instanceof Path2D.Float) {
p2df = (Path2D.Float)s;
} else {
p2df = new Path2D.Float(s);
}
transX = sg2d.transX;
transY = sg2d.transY;
} else {
p2df = new Path2D.Float(s, sg2d.transform);
transX = 0;
transY = 0;
}
sg2d.loops.drawPathLoop.DrawPath(sg2d, sg2d.getSurfaceData(),
transX, transY, p2df);
return;
}
if (sg2d.strokeState == SunGraphics2D.STROKE_CUSTOM) {
fill(sg2d, sg2d.stroke.createStrokedShape(s));
return;
}
ShapeSpanIterator sr = getStrokeSpans(sg2d, s);
try {
fillSpans(sg2d, sr);
} finally {
sr.dispose();
}
}
/**
* Return a ShapeSpanIterator instance that normalizes as
* appropriate for a fill operation as per the settings in
* the specified SunGraphics2D object.
*
* The ShapeSpanIterator will be newly constructed and ready
* to start taking in geometry.
*
* Note that the caller is responsible for calling dispose()
* on the returned ShapeSpanIterator inside a try/finally block:
* <pre>
* ShapeSpanIterator ssi = LoopPipe.getFillSSI(sg2d);
* try {
* ssi.setOutputArea(clip);
* ssi.appendPath(...); // or appendPoly
* // iterate the spans from ssi and operate on them
* } finally {
* ssi.dispose();
* }
* </pre>
*/
public static ShapeSpanIterator getFillSSI(SunGraphics2D sg2d) {
boolean adjust = ((sg2d.stroke instanceof BasicStroke) &&
sg2d.strokeHint != SunHints.INTVAL_STROKE_PURE);
return new ShapeSpanIterator(adjust);
}
/*
* Return a ShapeSpanIterator ready to iterate the spans of the wide
* outline of Shape s using the attributes of the SunGraphics2D
* object.
*
* The ShapeSpanIterator returned will be fully constructed
* and filled with the geometry from the Shape widened by the
* appropriate BasicStroke and normalization parameters taken
* from the SunGraphics2D object and be ready to start returning
* spans.
*
* Note that the caller is responsible for calling dispose()
* on the returned ShapeSpanIterator inside a try/finally block.
* <pre>
* ShapeSpanIterator ssi = LoopPipe.getStrokeSpans(sg2d, s);
* try {
* // iterate the spans from ssi and operate on them
* } finally {
* ssi.dispose();
* }
* </pre>
*
* REMIND: This should return a SpanIterator interface object
* but the caller needs to dispose() the object and that method
* is only on ShapeSpanIterator.
* TODO: Add a dispose() method to the SpanIterator interface.
*/
public static ShapeSpanIterator getStrokeSpans(SunGraphics2D sg2d,
Shape s)
{
ShapeSpanIterator sr = new ShapeSpanIterator(false);
try {
sr.setOutputArea(sg2d.getCompClip());
sr.setRule(PathIterator.WIND_NON_ZERO);
BasicStroke bs = (BasicStroke) sg2d.stroke;
boolean thin = (sg2d.strokeState <= SunGraphics2D.STROKE_THINDASHED);
boolean normalize =
(sg2d.strokeHint != SunHints.INTVAL_STROKE_PURE);
RenderEngine.strokeTo(s,
sg2d.transform, bs,
thin, normalize, false, sr);
} catch (Throwable t) {
sr.dispose();
sr = null;
throw new InternalError("Unable to Stroke shape ("+
t.getMessage()+")", t);
}
return sr;
}
public void fill(SunGraphics2D sg2d, Shape s) {
if (sg2d.strokeState == SunGraphics2D.STROKE_THIN) {
Path2D.Float p2df;
int transX;
int transY;
if (sg2d.transformState <= SunGraphics2D.TRANSFORM_INT_TRANSLATE) {
if (s instanceof Path2D.Float) {
p2df = (Path2D.Float)s;
} else {
p2df = new Path2D.Float(s);
}
transX = sg2d.transX;
transY = sg2d.transY;
} else {
p2df = new Path2D.Float(s, sg2d.transform);
transX = 0;
transY = 0;
}
sg2d.loops.fillPathLoop.FillPath(sg2d, sg2d.getSurfaceData(),
transX, transY, p2df);
return;
}
ShapeSpanIterator sr = getFillSSI(sg2d);
try {
sr.setOutputArea(sg2d.getCompClip());
AffineTransform at =
((sg2d.transformState == SunGraphics2D.TRANSFORM_ISIDENT)
? null
: sg2d.transform);
sr.appendPath(s.getPathIterator(at));
fillSpans(sg2d, sr);
} finally {
sr.dispose();
}
}
private static void fillSpans(SunGraphics2D sg2d, SpanIterator si) {
// REMIND: Eventually, the plan is that it will not be possible for
// fs to be null since the FillSpans loop will be the fundamental
// loop implemented for any destination type...
if (sg2d.clipState == SunGraphics2D.CLIP_SHAPE) {
si = sg2d.clipRegion.filter(si);
// REMIND: Region.filter produces a Java-only iterator
// with no native counterpart...
} else {
sun.java2d.loops.FillSpans fs = sg2d.loops.fillSpansLoop;
if (fs != null) {
fs.FillSpans(sg2d, sg2d.getSurfaceData(), si);
return;
}
}
int spanbox[] = new int[4];
SurfaceData sd = sg2d.getSurfaceData();
while (si.nextSpan(spanbox)) {
int x = spanbox[0];
int y = spanbox[1];
int w = spanbox[2] - x;
int h = spanbox[3] - y;
sg2d.loops.fillRectLoop.FillRect(sg2d, sd, x, y, w, h);
}
}
public void fillParallelogram(SunGraphics2D sg2d,
double ux1, double uy1,
double ux2, double uy2,
double x, double y,
double dx1, double dy1,
double dx2, double dy2)
{
FillParallelogram fp = sg2d.loops.fillParallelogramLoop;
fp.FillParallelogram(sg2d, sg2d.getSurfaceData(),
x, y, dx1, dy1, dx2, dy2);
}
public void drawParallelogram(SunGraphics2D sg2d,
double ux1, double uy1,
double ux2, double uy2,
double x, double y,
double dx1, double dy1,
double dx2, double dy2,
double lw1, double lw2)
{
DrawParallelogram dp = sg2d.loops.drawParallelogramLoop;
dp.DrawParallelogram(sg2d, sg2d.getSurfaceData(),
x, y, dx1, dy1, dx2, dy2, lw1, lw2);
}
}
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