6037    double   redf, greenf, bluef, alphaf;  member
6050    this->alphaf = this->alpha / (double)aMax;  in image_pixel_setf()
6065       this->alphae = this->alphaf * DBL_EPSILON;  in image_pixel_setf()
6247                this->alphaf = 0;  in image_pixel_add_alpha()
6249                this->alphaf = 1;  in image_pixel_add_alpha()
6252             this->alphaf = 1;  in image_pixel_add_alpha()
6269                this->alphaf = 0;  in image_pixel_add_alpha()
6271                this->alphaf = 1;  in image_pixel_add_alpha()
6274             this->alphaf = 1;  in image_pixel_add_alpha()
6491       that->alpha = sample_scale(that->alphaf, scale);  in image_transform_mod_end()
6497       that->alphaf = 1;    /* Override this. */  in image_transform_mod_end()
6905                in_pixel.alphaf, out_pixel.alpha, sample_depth, in_pixel.alphae,  in transform_image_validate()
7535    that->alphaf = 1;  in image_transform_png_set_strip_alpha_mod()
8332    if (that->alphaf < 1)  in image_transform_png_set_background_mod()
8335       if (that->alphaf <= 0)  in image_transform_png_set_background_mod()
8352          double alf = 1 - that->alphaf;  in image_transform_png_set_background_mod()
8354          that->redf = that->redf * that->alphaf + data.redf * alf;  in image_transform_png_set_background_mod()
8355          that->rede = that->rede * that->alphaf + data.rede * alf +  in image_transform_png_set_background_mod()
8357          that->greenf = that->greenf * that->alphaf + data.greenf * alf;  in image_transform_png_set_background_mod()
8358          that->greene = that->greene * that->alphaf + data.greene * alf +  in image_transform_png_set_background_mod()
8360          that->bluef = that->bluef * that->alphaf + data.bluef * alf;  in image_transform_png_set_background_mod()
8361          that->bluee = that->bluee * that->alphaf + data.bluee * alf +  in image_transform_png_set_background_mod()
8366       that->alphaf = 1;  in image_transform_png_set_background_mod()
8631       that->alphaf = ((double)that->alpha) / max;  in image_transform_png_set_filler_mod()
8698       that->alphaf = ((double)that->alpha) / max;  in image_transform_png_set_add_alpha_mod()