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/AliOS-Things-master/components/SDL2/src/image/external/libwebp-1.0.2/src/enc/
A Dpicture_csp_enc.c175 #define kGammaF (1./0.45) macro
197 value = pow(a_rec * (g + a), kGammaF); in InitGammaTablesS()
207 value = (1. + a) * pow(g, 1. / kGammaF) - a; in InitGammaTablesS()

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