13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  */
  24 
  25 /* pngwtran.c - transforms the data in a row for PNG writers
  26  *
  27  * This file is available under and governed by the GNU General Public
  28  * License version 2 only, as published by the Free Software Foundation.
  29  * However, the following notice accompanied the original version of this
  30  * file and, per its terms, should not be removed:
  31  *
  32  * Last changed in libpng 1.6.18 [July 23, 2015]
  33  * Copyright (c) 1998-2015 Glenn Randers-Pehrson
  34  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  35  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  36  *
  37  * This code is released under the libpng license.
  38  * For conditions of distribution and use, see the disclaimer
  39  * and license in png.h
  40  */
  41 
  42 #include "pngpriv.h"
  43 
  44 #ifdef PNG_WRITE_SUPPORTED
  45 #ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
  46 
  47 #ifdef PNG_WRITE_PACK_SUPPORTED
  48 /* Pack pixels into bytes.  Pass the true bit depth in bit_depth.  The
  49  * row_info bit depth should be 8 (one pixel per byte).  The channels
  50  * should be 1 (this only happens on grayscale and paletted images).
  51  */
  52 static void
  53 png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth)

  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  */
  24 
  25 /* pngwtran.c - transforms the data in a row for PNG writers
  26  *
  27  * This file is available under and governed by the GNU General Public
  28  * License version 2 only, as published by the Free Software Foundation.
  29  * However, the following notice accompanied the original version of this
  30  * file and, per its terms, should not be removed:
  31  *
  32  * Last changed in libpng 1.6.18 [July 23, 2015]
  33  * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson
  34  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  35  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  36  *
  37  * This code is released under the libpng license.
  38  * For conditions of distribution and use, see the disclaimer
  39  * and license in png.h
  40  */
  41 
  42 #include "pngpriv.h"
  43 
  44 #ifdef PNG_WRITE_SUPPORTED
  45 #ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
  46 
  47 #ifdef PNG_WRITE_PACK_SUPPORTED
  48 /* Pack pixels into bytes.  Pass the true bit depth in bit_depth.  The
  49  * row_info bit depth should be 8 (one pixel per byte).  The channels
  50  * should be 1 (this only happens on grayscale and paletted images).
  51  */
  52 static void
  53 png_do_pack(png_row_infop row_info, png_bytep row, png_uint_32 bit_depth)