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/PHP-7.3/ext/gd/libgd/
H A Dgd_interpolation.c494 #define KM_C (1.0f/3.0f) in filter_mitchell() macro
496 #define KM_P2 ((-18.0f + 12.0f * KM_B + 6.0f * KM_C) / 6.0f) in filter_mitchell()
497 #define KM_P3 (( 12.0f - 9.0f * KM_B - 6.0f * KM_C) / 6.0f) in filter_mitchell()
498 #define KM_Q0 (( 8.0f * KM_B + 24.0f * KM_C) / 6.0f) in filter_mitchell()
499 #define KM_Q1 ((-12.0f * KM_B - 48.0f * KM_C) / 6.0f) in filter_mitchell()
500 #define KM_Q2 (( 6.0f * KM_B + 30.0f * KM_C) / 6.0f) in filter_mitchell()
501 #define KM_Q3 (( -1.0f * KM_B - 6.0f * KM_C) / 6.0f) in filter_mitchell()

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