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src/java.desktop/share/classes/com/sun/imageio/plugins/common/BogusColorSpace.java

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  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.imageio.plugins.common;
  27 
  28 import java.awt.color.ColorSpace;
  29 
  30 /**
  31  * A dummy <code>ColorSpace</code> to enable <code>ColorModel</code>
  32  * for image data which do not have an innate color representation.
  33  */
  34 @SuppressWarnings("serial") // JDK-implementation class
  35 public class BogusColorSpace extends ColorSpace {
  36     /**
  37      * Return the type given the number of components.
  38      *
  39      * @param numComponents The number of components in the
  40      * <code>ColorSpace</code>.
  41      * @exception IllegalArgumentException if <code>numComponents</code>
  42      * is less than 1.
  43      */
  44     private static int getType(int numComponents) {
  45         if(numComponents < 1) {
  46             throw new IllegalArgumentException("numComponents < 1!");
  47         }
  48 
  49         int type;
  50         switch(numComponents) {
  51         case 1:
  52             type = ColorSpace.TYPE_GRAY;
  53             break;
  54         default:
  55             // Based on the constant definitions TYPE_2CLR=12 through
  56             // TYPE_FCLR=25. This will return unknown types for
  57             // numComponents > 15.
  58             type = numComponents + 10;
  59         }
  60 
  61         return type;
  62     }
  63 
  64     /**
  65      * Constructs a bogus <code>ColorSpace</code>.
  66      *
  67      * @param numComponents The number of components in the
  68      * <code>ColorSpace</code>.
  69      * @exception IllegalArgumentException if <code>numComponents</code>
  70      * is less than 1.
  71      */
  72     public BogusColorSpace(int numComponents) {
  73         super(getType(numComponents), numComponents);
  74     }
  75 
  76     //
  77     // The following methods simply copy the input array to the
  78     // output array while otherwise attempting to adhere to the
  79     // specified behavior of the methods vis-a-vis exceptions.
  80     //
  81 
  82     public float[] toRGB(float[] colorvalue) {
  83         if(colorvalue.length < getNumComponents()) {
  84             throw new ArrayIndexOutOfBoundsException
  85                 ("colorvalue.length < getNumComponents()");
  86         }
  87 
  88         float[] rgbvalue = new float[3];
  89 




  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.imageio.plugins.common;
  27 
  28 import java.awt.color.ColorSpace;
  29 
  30 /**
  31  * A dummy {@code ColorSpace} to enable {@code ColorModel}
  32  * for image data which do not have an innate color representation.
  33  */
  34 @SuppressWarnings("serial") // JDK-implementation class
  35 public class BogusColorSpace extends ColorSpace {
  36     /**
  37      * Return the type given the number of components.
  38      *
  39      * @param numComponents The number of components in the
  40      * {@code ColorSpace}.
  41      * @exception IllegalArgumentException if {@code numComponents}
  42      * is less than 1.
  43      */
  44     private static int getType(int numComponents) {
  45         if(numComponents < 1) {
  46             throw new IllegalArgumentException("numComponents < 1!");
  47         }
  48 
  49         int type;
  50         switch(numComponents) {
  51         case 1:
  52             type = ColorSpace.TYPE_GRAY;
  53             break;
  54         default:
  55             // Based on the constant definitions TYPE_2CLR=12 through
  56             // TYPE_FCLR=25. This will return unknown types for
  57             // numComponents > 15.
  58             type = numComponents + 10;
  59         }
  60 
  61         return type;
  62     }
  63 
  64     /**
  65      * Constructs a bogus {@code ColorSpace}.
  66      *
  67      * @param numComponents The number of components in the
  68      * {@code ColorSpace}.
  69      * @exception IllegalArgumentException if {@code numComponents}
  70      * is less than 1.
  71      */
  72     public BogusColorSpace(int numComponents) {
  73         super(getType(numComponents), numComponents);
  74     }
  75 
  76     //
  77     // The following methods simply copy the input array to the
  78     // output array while otherwise attempting to adhere to the
  79     // specified behavior of the methods vis-a-vis exceptions.
  80     //
  81 
  82     public float[] toRGB(float[] colorvalue) {
  83         if(colorvalue.length < getNumComponents()) {
  84             throw new ArrayIndexOutOfBoundsException
  85                 ("colorvalue.length < getNumComponents()");
  86         }
  87 
  88         float[] rgbvalue = new float[3];
  89 


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