PNG_FP_SAW_SIGN  1333 3rdparty/libpng/png.c       case 43:  type = PNG_FP_SAW_SIGN;                   break;
PNG_FP_SAW_SIGN  1334 3rdparty/libpng/png.c       case 45:  type = PNG_FP_SAW_SIGN + PNG_FP_NEGATIVE; break;
PNG_FP_SAW_SIGN  1351 3rdparty/libpng/png.c       case PNG_FP_INTEGER + PNG_FP_SAW_SIGN:
PNG_FP_SAW_SIGN  1409 3rdparty/libpng/png.c       case PNG_FP_EXPONENT + PNG_FP_SAW_SIGN:
PNG_FP_SAW_SIGN  1413 3rdparty/libpng/png.c          png_fp_add(state, PNG_FP_SAW_SIGN);