png_hIST          209 contrib/libtests/pngunknown.c    { "hIST", PNG_INFO_hIST, png_hIST,
png_hIST          802 contrib/tools/pngfix.c       case png_fRAc: case png_gIFg: case png_gIFt: case png_gIFx: case png_hIST:
png_hIST          361 pngpread.c        else if (chunk_name == png_hIST)
png_hIST          181 pngread.c            else if (chunk_name == png_hIST)
png_hIST          838 pngread.c            else if (chunk_name == png_hIST)
png_hIST         1569 pngwutil.c        png_write_chunk_header(png_ptr, png_hIST, (png_uint_32)(num_hist * 2));