844    png_ptr->background_1 = png_ptr->background;  in png_init_read_transformations()
993             png_ptr->background_1.gray = (png_uint_16)(pow(  in png_init_read_transformations()
1003                png_ptr->background_1.red = (png_uint_16)(pow(  in png_init_read_transformations()
1005                png_ptr->background_1.green = (png_uint_16)(pow(  in png_init_read_transformations()
1007                png_ptr->background_1.blue = (png_uint_16)(pow(  in png_init_read_transformations()
1019                png_ptr->background_1.red = png_ptr->background_1.green  in png_init_read_transformations()
1020                  = png_ptr->background_1.blue = png_ptr->background_1.gray;  in png_init_read_transformations()
1377          , &(png_ptr->background_1),  in png_do_read_transformations()
2696    , png_color_16p background_1,  in png_do_background()  argument
3066                         png_composite(w, v, a, background_1->gray);  in png_do_background()
3091                         png_composite(*dp, *sp, a, background_1->gray);  in png_do_background()
3135                         png_composite_16(v, g, a, background_1->gray);  in png_do_background()
3170                         png_composite_16(v, g, a, background_1->gray);  in png_do_background()
3212                         png_composite(w, v, a, background_1->red);  in png_do_background()
3215                         png_composite(w, v, a, background_1->green);  in png_do_background()
3218                         png_composite(w, v, a, background_1->blue);  in png_do_background()
3296                         png_composite_16(w, v, a, background_1->red);  in png_do_background()
3301                         png_composite_16(w, v, a, background_1->green);  in png_do_background()
3306                         png_composite_16(w, v, a, background_1->blue);  in png_do_background()