926             png_color back, back_1;  in png_init_read_transformations()  local
936                back_1.red = png_ptr->gamma_to_1[png_ptr->background.red];  in png_init_read_transformations()
937                back_1.green = png_ptr->gamma_to_1[png_ptr->background.green];  in png_init_read_transformations()
938                back_1.blue = png_ptr->gamma_to_1[png_ptr->background.blue];  in png_init_read_transformations()
983                back_1.red = (png_byte)(pow(  in png_init_read_transformations()
985                back_1.green = (png_byte)(pow(  in png_init_read_transformations()
987                back_1.blue = (png_byte)(pow(  in png_init_read_transformations()
1003                      png_composite(w, v, png_ptr->trans[i], back_1.red);  in png_init_read_transformations()
1007                      png_composite(w, v, png_ptr->trans[i], back_1.green);  in png_init_read_transformations()
1011                      png_composite(w, v, png_ptr->trans[i], back_1.blue);  in png_init_read_transformations()
2621       png_color back, back_1;  in png_correct_palette()  local
2629          back_1.red = png_ptr->gamma_to_1[png_ptr->background.red];  in png_correct_palette()
2630          back_1.green = png_ptr->gamma_to_1[png_ptr->background.green];  in png_correct_palette()
2631          back_1.blue = png_ptr->gamma_to_1[png_ptr->background.blue];  in png_correct_palette()
2661          back_1.red =  in png_correct_palette()
2664          back_1.green =  in png_correct_palette()
2667          back_1.blue =  in png_correct_palette()
2687                png_composite(w, v, png_ptr->trans[i], back_1.red);  in png_correct_palette()
2691                png_composite(w, v, png_ptr->trans[i], back_1.green);  in png_correct_palette()
2695                png_composite(w, v, png_ptr->trans[i], back_1.blue);  in png_correct_palette()