libpng: Optimize RGBA png_do_expand_palette

third_party/libpng/pngpriv.h

 
 /* pngpriv.h - private declarations for use inside libpng
  *
  * Last changed in libpng 1.6.22 [May 26, 2016]
  * Copyright (c) 1998-2002,2004,2006-2016 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  *
  * This code is released under the libpng license.
  * For conditions of distribution and use, see the disclaimer
@@ skipping 1953 matching lines @@
     */
 PNG_INTERNAL_FUNCTION(void, png_init_filter_functions_neon,
    (png_structp png_ptr, unsigned int bpp), PNG_EMPTY);
 PNG_INTERNAL_FUNCTION(void, png_init_filter_functions_sse2,
    (png_structp png_ptr, unsigned int bpp), PNG_EMPTY);
 #endif
 
 PNG_INTERNAL_FUNCTION(png_uint_32, png_check_keyword, (png_structrp png_ptr,
    png_const_charp key, png_bytep new_key), PNG_EMPTY);
 
+#if PNG_ARM_NEON_IMPLEMENTATION == 1
+PNG_INTERNAL_FUNCTION(void, png_riffle_palette,
+   (png_structrp, png_row_infop), PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(int, png_do_expand_palette_neon,
+   (png_structrp, png_row_infop, png_const_bytep, const png_bytepp,
+   const png_bytepp), PNG_EMPTY);
+#endif
+
 /* Maintainer: Put new private prototypes here ^ */
 
 #include "pngdebug.h"
 
 #ifdef __cplusplus
 }
 #endif
 
 #endif /* PNG_VERSION_INFO_ONLY */
 #endif /* PNGPRIV_H */