org.jogamp.glg2d.impl.gl2.GL2ShapeDrawer.java Source code

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Here is the source code for org.jogamp.glg2d.impl.gl2.GL2ShapeDrawer.java

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/*
 * Copyright 2013 Brandon Borkholder
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jogamp.glg2d.impl.gl2;

import java.awt.BasicStroke;
import java.awt.RenderingHints;
import java.awt.RenderingHints.Key;
import java.awt.Shape;
import java.awt.Stroke;

import org.lwjgl.opengl.GL11;
import org.lwjgl.opengl.GL13;
import org.lwjgl.opengl.GLContext;

import org.jogamp.glg2d.GLGraphics2D;
import org.jogamp.glg2d.impl.AbstractShapeHelper;
import org.jogamp.glg2d.impl.SimpleOrTesselatingVisitor;

public class GL2ShapeDrawer extends AbstractShapeHelper {
    protected GLContext context;

    protected FillSimpleConvexPolygonVisitor simpleFillVisitor;
    protected SimpleOrTesselatingVisitor complexFillVisitor;
    protected LineDrawingVisitor simpleStrokeVisitor;
    protected FastLineVisitor fastLineVisitor;

    public GL2ShapeDrawer() {
        simpleFillVisitor = new FillSimpleConvexPolygonVisitor();
        complexFillVisitor = new SimpleOrTesselatingVisitor(simpleFillVisitor, new GL2TesselatorVisitor());
        simpleStrokeVisitor = new LineDrawingVisitor();
        fastLineVisitor = new FastLineVisitor();
    }

    @Override
    public void setG2D(GLGraphics2D g2d) {
        super.setG2D(g2d);
        context = g2d.getGLContext();
        simpleFillVisitor.setGLContext(context);
        complexFillVisitor.setGLContext(context);
        simpleStrokeVisitor.setGLContext(context);
        fastLineVisitor.setGLContext(context);
    }

    @Override
    public void setHint(Key key, Object value) {
        super.setHint(key, value);

        if (key == RenderingHints.KEY_ANTIALIASING) {
            if (value == RenderingHints.VALUE_ANTIALIAS_ON) {
                GL11.glEnable(GL13.GL_MULTISAMPLE);
            } else {
                GL11.glDisable(GL13.GL_MULTISAMPLE);
            }
        }
    }

    @Override
    public void draw(Shape shape) {
        Stroke stroke = getStroke();
        if (stroke instanceof BasicStroke) {
            BasicStroke basicStroke = (BasicStroke) stroke;
            if (fastLineVisitor.isValid(basicStroke)) {
                fastLineVisitor.setStroke(basicStroke);
                traceShape(shape, fastLineVisitor);
                return;
            } else if (basicStroke.getDashArray() == null) {
                simpleStrokeVisitor.setStroke(basicStroke);
                traceShape(shape, simpleStrokeVisitor);
                return;
            }
        }

        // can fall through for various reasons
        fill(stroke.createStrokedShape(shape));
    }

    @Override
    protected void fill(Shape shape, boolean forceSimple) {
        if (forceSimple) {
            traceShape(shape, simpleFillVisitor);
        } else {
            traceShape(shape, complexFillVisitor);
        }
    }
}