PNG_GAMMA_THRESHOLD_FIXED 3338 png.c             return gamma_val < PNG_FP_1 - PNG_GAMMA_THRESHOLD_FIXED ||
PNG_GAMMA_THRESHOLD_FIXED 3339 png.c                 gamma_val > PNG_FP_1 + PNG_GAMMA_THRESHOLD_FIXED;
PNG_GAMMA_THRESHOLD_FIXED 1469 png.h          #define PNG_GAMMA_THRESHOLD (PNG_GAMMA_THRESHOLD_FIXED*.00001)