png_handle_sBIT   760 third_party/libpng/pngrutil.c png_handle_sBIT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_handle_sBIT   292 third_party/libpng/pngusr.h #define png_handle_sBIT                 wk_png_handle_sBIT