Unused.

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/branches/Temp_AFPGOCAResources@663121 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/fop/render/afp/modca/AbstractResourceGroupContainer.java

@@ -101,70 +101,6 @@ public abstract class AbstractResourceGroupContainer extends AbstractPageObject
         }
         return resourceGroup;
     }
-      
-    /**
-     * Converts a byte array containing 24 bit RGB image data to a grayscale
-     * image.
-     * 
-     * @param io
-     *            the target image object
-     * @param raw
-     *            the buffer containing the RGB image data
-     * @param width
-     *            the width of the image in pixels
-     * @param height
-     *            the height of the image in pixels
-     * @param bitsPerPixel
-     *            the number of bits to use per pixel
-     *            
-     * TODO: move this method somewhere appropriate in commons
-     */
-    private static void convertToGrayScaleImage(ImageObject io, byte[] raw, int width,
-            int height, int bitsPerPixel) {
-        int pixelsPerByte = 8 / bitsPerPixel;
-        int bytewidth = (width / pixelsPerByte);
-        if ((width % pixelsPerByte) != 0) {
-            bytewidth++;
-        }
-        byte[] bw = new byte[height * bytewidth];
-        byte ib;
-        for (int y = 0; y < height; y++) {
-            ib = 0;
-            int i = 3 * y * width;
-            for (int x = 0; x < width; x++, i += 3) {
-
-                // see http://www.jguru.com/faq/view.jsp?EID=221919
-                double greyVal = 0.212671d * ((int) raw[i] & 0xff) + 0.715160d
-                        * ((int) raw[i + 1] & 0xff) + 0.072169d
-                        * ((int) raw[i + 2] & 0xff);
-                switch (bitsPerPixel) {
-                case 1:
-                    if (greyVal < 128) {
-                        ib |= (byte) (1 << (7 - (x % 8)));
-                    }
-                    break;
-                case 4:
-                    greyVal /= 16;
-                    ib |= (byte) ((byte) greyVal << ((1 - (x % 2)) * 4));
-                    break;
-                case 8:
-                    ib = (byte) greyVal;
-                    break;
-                default:
-                    throw new UnsupportedOperationException(
-                            "Unsupported bits per pixel: " + bitsPerPixel);
-                }
-
-                if ((x % pixelsPerByte) == (pixelsPerByte - 1)
-                        || ((x + 1) == width)) {
-                    bw[(y * bytewidth) + (x / pixelsPerByte)] = ib;
-                    ib = 0;
-                }
-            }
-        }
-        io.setImageIDESize((byte) bitsPerPixel);
-        io.setImageData(bw);
-    }
     
     /**
      * Creates and returns a new data object