src/java.desktop/share/classes/com/sun/imageio/plugins/png/PNGImageWriter.java

*** 1,7 ****
  /*
!  * Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
--- 1,7 ----
  /*
!  * Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
*** 649,663 ****
          if (metadata.bKGD_present) {
              ChunkStream cs = new ChunkStream(PNGImageReader.bKGD_TYPE, stream);
              int colorType = metadata.IHDR_colorType & 0x3;
              int chunkType = metadata.bKGD_colorType;
  
              // Special case: image is RGB(A) and chunk is Gray
              // Promote chunk contents to RGB
-             int chunkRed = metadata.bKGD_red;
-             int chunkGreen = metadata.bKGD_red;
-             int chunkBlue = metadata.bKGD_red;
              if (colorType == PNGImageReader.PNG_COLOR_RGB &&
                  chunkType == PNGImageReader.PNG_COLOR_GRAY) {
                  // Make a gray bKGD chunk look like RGB
                  chunkType = colorType;
                  chunkRed = chunkGreen = chunkBlue =
--- 649,663 ----
          if (metadata.bKGD_present) {
              ChunkStream cs = new ChunkStream(PNGImageReader.bKGD_TYPE, stream);
              int colorType = metadata.IHDR_colorType & 0x3;
              int chunkType = metadata.bKGD_colorType;
  
+             int chunkRed = metadata.bKGD_red;
+             int chunkGreen = metadata.bKGD_green;
+             int chunkBlue = metadata.bKGD_blue;
              // Special case: image is RGB(A) and chunk is Gray
              // Promote chunk contents to RGB
              if (colorType == PNGImageReader.PNG_COLOR_RGB &&
                  chunkType == PNGImageReader.PNG_COLOR_GRAY) {
                  // Make a gray bKGD chunk look like RGB
                  chunkType = colorType;
                  chunkRed = chunkGreen = chunkBlue =