/*

 * Copyright 1999-2007 Sun Microsystems, Inc.  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.  Sun designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

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.awt.SunHints;

public class LoopPipe

    implements PixelDrawPipe,

               PixelFillPipe,

               ShapeDrawPipe

{

    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 == sg2d.STROKE_THIN) {

            Path2D.Float p2df;

            int transX;

            int transY;

            if (sg2d.transformState <= sg2d.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 == sg2d.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 <= sg2d.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;

            t.printStackTrace();

            throw new InternalError("Unable to Stroke shape ("+

                                    t.getMessage()+")");

        }

        return sr;

    }

    public void fill(SunGraphics2D sg2d, Shape s) {

        if (sg2d.strokeState == sg2d.STROKE_THIN) {

            Path2D.Float p2df;

            int transX;

            int transY;

            if (sg2d.transformState <= sg2d.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 == sg2d.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 == sg2d.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);

        }

    }

}