kRiffHeaderSize   756 ext/gd/libgd/webpimg.c   const int kRiffHeaderSize = 20;
kRiffHeaderSize   761 ext/gd/libgd/webpimg.c                 QP, kRiffHeaderSize,
kRiffHeaderSize   766 ext/gd/libgd/webpimg.c 	  const int img_size_bytes  = *p_out_size_bytes - kRiffHeaderSize;
kRiffHeaderSize   780 ext/gd/libgd/webpimg.c 	  memcpy(*p_out, kRiffHeader, kRiffHeaderSize);