1   /*
    2    * Licensed to the Apache Software Foundation (ASF) under one or more
    3    * contributor license agreements.  See the NOTICE file distributed with
    4    * this work for additional information regarding copyright ownership.
    5    * The ASF licenses this file to You under the Apache License, Version 2.0
    6    * (the "License"); you may not use this file except in compliance with
    7    * the License.  You may obtain a copy of the License at
    8    *
    9    *      http://www.apache.org/licenses/LICENSE-2.0
   10    *
   11    * Unless required by applicable law or agreed to in writing, software
   12    * distributed under the License is distributed on an "AS IS" BASIS,
   13    * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   14    * See the License for the specific language governing permissions and
   15    * limitations under the License.
   16    */
   17   package org.apache.pdfbox.pdmodel.graphics.color;
   18   
   19   import java.awt.Transparency;
   20   
   21   import java.awt.color.ColorSpace;
   22   
   23   import java.awt.image.ColorModel;
   24   import java.awt.image.ComponentColorModel;
   25   import java.awt.image.DataBuffer;
   26   
   27   import java.io.IOException;
   28   
   29   /**
   30    * This class represents an RGB color space.
   31    *
   32    * @author <a href="mailto:ben@benlitchfield.com">Ben Litchfield</a>
   33    * @version $Revision: 1.8 $
   34    */
   35   public class PDDeviceRGB extends PDColorSpace
   36   {
   37       /**
   38        * The name of this color space.
   39        */
   40       public static final String NAME = "DeviceRGB";
   41   
   42       /**
   43        * The abbreviated name of this color space.
   44        */
   45       public static final String ABBREVIATED_NAME = "RGB";
   46   
   47       /**
   48        * This is the single instance of this class.
   49        */
   50       public static final PDDeviceRGB INSTANCE = new PDDeviceRGB();
   51   
   52       /**
   53        * This class is immutable.
   54        */
   55       private PDDeviceRGB()
   56       {
   57           //only here to make immutable.
   58       }
   59   
   60       /**
   61        * This will return the name of the color space.
   62        *
   63        * @return The name of the color space.
   64        */
   65       public String getName()
   66       {
   67           return NAME;
   68       }
   69   
   70       /**
   71        * This will get the number of components that this color space is made up of.
   72        *
   73        * @return The number of components in this color space.
   74        *
   75        * @throws IOException If there is an error getting the number of color components.
   76        */
   77       public int getNumberOfComponents() throws IOException
   78       {
   79           return 3;
   80       }
   81   
   82       /**
   83        * Create a Java colorspace for this colorspace.
   84        *
   85        * @return A color space that can be used for Java AWT operations.
   86        */
   87       protected ColorSpace createColorSpace()
   88       {
   89           return ColorSpace.getInstance( ColorSpace.CS_sRGB );
   90       }
   91   
   92       /**
   93        * Create a Java color model for this colorspace.
   94        *
   95        * @param bpc The number of bits per component.
   96        *
   97        * @return A color model that can be used for Java AWT operations.
   98        *
   99        * @throws IOException If there is an error creating the color model.
  100        */
  101       public ColorModel createColorModel( int bpc ) throws IOException
  102       {
  103           int[] nbBits = { bpc, bpc, bpc };
  104           ComponentColorModel componentColorModel =
  105                   new ComponentColorModel( getJavaColorSpace(),
  106                                            nbBits,
  107                                            false,
  108                                            false,
  109                                            Transparency.OPAQUE,
  110                                            DataBuffer.TYPE_BYTE );
  111   
  112           return componentColorModel;
  113       }
  114   }