323    if (png_ptr->gamma == 0)  in png_set_alpha_mode_fixed()
324       png_ptr->gamma = file_gamma;  in png_set_alpha_mode_fixed()
336       png_ptr->background_gamma = png_ptr->gamma; /* just in case */  in png_set_alpha_mode_fixed()
803    png_ptr->gamma = file_gamma;  in png_set_gamma_fixed()
1270       if (png_ptr->gamma != 0) /* has been set */  in png_init_read_transformations()
1273             gamma_correction = png_gamma_threshold(png_ptr->gamma,  in png_init_read_transformations()
1280             png_ptr->screen_gamma = png_reciprocal(png_ptr->gamma);  in png_init_read_transformations()
1289          png_ptr->gamma = png_reciprocal(png_ptr->screen_gamma);  in png_init_read_transformations()
1297          png_ptr->screen_gamma = png_ptr->gamma = PNG_FP_1;  in png_init_read_transformations()
1519          && (png_gamma_significant(png_ptr->gamma) ||  in png_init_read_transformations()
1522          && (png_gamma_significant(png_ptr->gamma)  in png_init_read_transformations()
1579                      g = png_reciprocal(png_ptr->gamma);  in png_init_read_transformations()
1580                      gs = png_reciprocal2(png_ptr->gamma,  in png_init_read_transformations()
1688                   g = png_reciprocal(png_ptr->gamma);  in png_init_read_transformations()
1689                   gs = png_reciprocal2(png_ptr->gamma, png_ptr->screen_gamma);  in png_init_read_transformations()
1932    info_ptr->gamma = png_ptr->gamma;  in png_read_transform_info()