793          double correct = -log(i/255.)/log(2.)*65536;  in validation_gamma()  local
794          double error = png_log8bit(i) - correct;  in validation_gamma()
800              i != 0 && png_log8bit(i) != floor(correct+.5))  in validation_gamma()
803                i, png_log8bit(i), correct);  in validation_gamma()
813          double correct = -log(i/65535.)/log(2.)*65536;  in validation_gamma()  local
814          double error = png_log16bit(i) - correct;  in validation_gamma()
820              i != 0 && png_log16bit(i) != floor(correct+.5))  in validation_gamma()
825                   " error: %f\n", i, png_log16bit(i), correct, error);  in validation_gamma()
837          double correct = exp(-i/65536. * log(2.)) * (65536. * 65536);  in validation_gamma()  local
838          double error = png_exp(i) - correct;  in validation_gamma()
845                   " error: %f\n", i, png_exp(i), correct, error);  in validation_gamma()
855          double correct = exp(-i/65536. * log(2.)) * 255;  in validation_gamma()  local
856          double error = png_exp8bit(i) - correct;  in validation_gamma()
863                   " error: %f\n", i, png_exp8bit(i), correct, error);  in validation_gamma()
873          double correct = exp(-i/65536. * log(2.)) * 65535;  in validation_gamma()  local
874          double error = png_exp16bit(i) - correct;  in validation_gamma()
881                   " error: %f\n", i, png_exp16bit(i), correct, error);  in validation_gamma()
902          double correct = pow(j/255., g) * 255;  in validation_gamma()  local
904          double error = out - correct;  in validation_gamma()
908          if (out != floor(correct+.5))  in validation_gamma()
911                j, g, out, correct, error);  in validation_gamma()
921          double correct = pow(j/65535., g) * 65535;  in validation_gamma()  local
923          double error = out - correct;  in validation_gamma()
930                j, g, out, correct, error);  in validation_gamma()