211 translate_gamma_flags(png_structrp png_ptr, png_fixed_point output_gamma,  in translate_gamma_flags()  argument
219    if (output_gamma == PNG_DEFAULT_sRGB ||  in translate_gamma_flags()
220       output_gamma == PNG_FP_1 / PNG_DEFAULT_sRGB)  in translate_gamma_flags()
231          output_gamma = PNG_GAMMA_sRGB;  in translate_gamma_flags()
233          output_gamma = PNG_GAMMA_sRGB_INVERSE;  in translate_gamma_flags()
236    else if (output_gamma == PNG_GAMMA_MAC_18 ||  in translate_gamma_flags()
237       output_gamma == PNG_FP_1 / PNG_GAMMA_MAC_18)  in translate_gamma_flags()
240          output_gamma = PNG_GAMMA_MAC_OLD;  in translate_gamma_flags()
242          output_gamma = PNG_GAMMA_MAC_INVERSE;  in translate_gamma_flags()
245    return output_gamma;  in translate_gamma_flags()
250 convert_gamma_value(png_structrp png_ptr, double output_gamma)  in convert_gamma_value()  argument
259    if (output_gamma > 0 && output_gamma < 128)  in convert_gamma_value()
260       output_gamma *= PNG_FP_1;  in convert_gamma_value()
263    output_gamma = floor(output_gamma + .5);  in convert_gamma_value()
265    if (output_gamma > PNG_FP_MAX || output_gamma < PNG_FP_MIN)  in convert_gamma_value()
268    return (png_fixed_point)output_gamma;  in convert_gamma_value()
276    png_fixed_point output_gamma)  in png_set_alpha_mode_fixed()  argument
286    output_gamma = translate_gamma_flags(png_ptr, output_gamma, 1/*screen*/);  in png_set_alpha_mode_fixed()
297    if (output_gamma < 1000 || output_gamma > 10000000)  in png_set_alpha_mode_fixed()
303    file_gamma = png_reciprocal(output_gamma);  in png_set_alpha_mode_fixed()
334          output_gamma = PNG_FP_1;  in png_set_alpha_mode_fixed()
365    png_ptr->screen_gamma = output_gamma;  in png_set_alpha_mode_fixed()
388 png_set_alpha_mode(png_structrp png_ptr, int mode, double output_gamma)  in png_set_alpha_mode()  argument
391       output_gamma));  in png_set_alpha_mode()