GL2ES2ShapeDrawer.java

/*
 * Copyright 2015 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.shader;


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

import com.jogamp.opengl.GL;

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

public class GL2ES2ShapeDrawer extends AbstractShapeHelper {
  protected ShaderPathVisitor lineVisitor;
  protected ShaderPathVisitor simpleFillVisitor;
  protected ShaderPathVisitor tesselatingVisitor;
  protected PathVisitor complexFillVisitor;

  public GL2ES2ShapeDrawer() {
    lineVisitor = new GL2ES2StrokeLineVisitor();
    simpleFillVisitor = new GL2ES2SimpleConvexFillVisitor();
    tesselatingVisitor = new GL2ES2TesselatingVisitor();
    complexFillVisitor = new SimpleOrTesselatingVisitor(simpleFillVisitor, tesselatingVisitor);
  }

  @Override
  public void setG2D(GLGraphics2D g2d) {
    super.setG2D(g2d);

    if (g2d instanceof GLShaderGraphics2D) {
      GL gl = g2d.getGLContext().getGL();
      UniformBufferObject uniforms = ((GLShaderGraphics2D) g2d).getUniformsObject();

      lineVisitor.setGLContext(gl, uniforms);
      simpleFillVisitor.setGLContext(gl, uniforms);
      tesselatingVisitor.setGLContext(gl, uniforms);
      complexFillVisitor.setGLContext(gl);
    } else {
      throw new IllegalArgumentException(GLGraphics2D.class.getName() + " implementation must be instance of "
          + GLShaderGraphics2D.class.getSimpleName());
    }
  }

  public void draw(Shape shape) {
    Stroke stroke = getStroke();
    if (stroke instanceof BasicStroke) {
      lineVisitor.setStroke((BasicStroke) stroke);
      traceShape(shape, lineVisitor);
    } else {
      fill(stroke.createStrokedShape(shape), false);
    }
  }

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