SwingUniversalImageBitmap.java

/*! ******************************************************************************
 *
 * Pentaho Data Integration
 *
 * Copyright (C) 2002-2015 by Pentaho : http://www.pentaho.com
 *
 *******************************************************************************
 *
 * 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
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package org.pentaho.di.core;

import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;

public class SwingUniversalImageBitmap extends SwingUniversalImage {
  private final BufferedImage bitmap;

  public SwingUniversalImageBitmap( BufferedImage bitmap ) {
    this.bitmap = bitmap;
  }

  @Override
  public boolean isBitmap() {
    return true;
  }

  @Override
  protected void renderSimple( BufferedImage area ) {
    Graphics2D gc = createGraphics( area );
    gc.drawImage( bitmap, 0, 0, area.getWidth(), area.getHeight(), null );
    gc.dispose();
  }

  @Override
  protected void render( Graphics2D gc, int centerX, int centerY, int width, int height, double angleRadians ) {
    AffineTransform oldTransform = gc.getTransform();
    try {
      double scaleX = width * 1.0 / bitmap.getWidth();
      double scaleY = height * 1.0 / bitmap.getHeight();

      AffineTransform affineTransform = new AffineTransform( oldTransform );
      if ( centerX != 0 || centerY != 0 ) {
        affineTransform.translate( centerX, centerY );
      }
      affineTransform.scale( scaleX, scaleY );
      if ( angleRadians != 0 ) {
        affineTransform.rotate( angleRadians );
      }
      affineTransform.translate( -bitmap.getWidth() / 2, -bitmap.getHeight() / 2 );

      gc.setTransform( affineTransform );

      gc.drawImage( bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), null );
    } finally {
      gc.setTransform( oldTransform );
    }
  }
}