Lines Matching refs:grayval
8238 float s_d, s_w, maxval, shading_factor, grayval;
8273 grayval = (float) *from;
8275 if ( grayval < s_d ) grayval = s_d;
8276 grayval = ( grayval - s_d ) * maxval / (s_w - s_d );
8277 grayval = MAX( 0.0, grayval );
8278 grayval = MIN( maxval, grayval );
8280 if ( (uint8_t)grayval < threshold ) val = 1; else val = 0;