-/*
- * Compute dp ^ SpecularExponent.
- * Lerp between adjacent values in the f(x) lookup table, giving a
- * continuous function, with adequate overall accuracy. (Though still
- * pretty good compared to a straight lookup).
- */
-static inline GLfloat
-_mesa_lookup_shininess(const struct gl_context *ctx, GLuint face, GLfloat dp)
-{
- const struct gl_shine_tab *tab = ctx->_ShineTable[face];
- float f = dp * (SHINE_TABLE_SIZE - 1);
- int k = (int) f;
- if (k < 0 /* gcc may cast an overflow float value to negative int value */
- || k > SHINE_TABLE_SIZE - 2)
- return powf(dp, tab->shininess);
- else
- return tab->tab[k] + (f - k) * (tab->tab[k+1] - tab->tab[k]);
-}
-
-