101     switch (compptr->DCT_scaled_size) {

   101     switch ((compptr->DCT_h_scaled_size << 8) + compptr->DCT_v_scaled_size) {

   103     case 1:

   103     case ((1 << 8) + 1):

   105       method = JDCT_ISLOW;	/* jidctred uses islow-style table */

   105       method = JDCT_ISLOW;	/* jidctint uses islow-style table */

   106       break;

   106       break;

   107     case 2:

   107     case ((2 << 8) + 2):

   109       method = JDCT_ISLOW;	/* jidctred uses islow-style table */

   109       method = JDCT_ISLOW;	/* jidctint uses islow-style table */

   110       break;

   110       break;

   111     case 4:

   111     case ((3 << 8) + 3):

   112       method_ptr = jpeg_idct_3x3;

   113       method = JDCT_ISLOW;	/* jidctint uses islow-style table */

   114       break;

   115     case ((4 << 8) + 4):

   113       method = JDCT_ISLOW;	/* jidctred uses islow-style table */

   117       method = JDCT_ISLOW;	/* jidctint uses islow-style table */

   114       break;

   118       break;

   115 #endif

   119     case ((5 << 8) + 5):

   116     case DCTSIZE:

   120       method_ptr = jpeg_idct_5x5;

   121       method = JDCT_ISLOW;	/* jidctint uses islow-style table */

   122       break;

   123     case ((6 << 8) + 6):

   124       method_ptr = jpeg_idct_6x6;

   125       method = JDCT_ISLOW;	/* jidctint uses islow-style table */

   126       break;

   127     case ((7 << 8) + 7):

   128       method_ptr = jpeg_idct_7x7;

   129       method = JDCT_ISLOW;	/* jidctint uses islow-style table */

   130       break;

   131     case ((9 << 8) + 9):

   132       method_ptr = jpeg_idct_9x9;

   133       method = JDCT_ISLOW;	/* jidctint uses islow-style table */

   134       break;

   135     case ((10 << 8) + 10):

   136       method_ptr = jpeg_idct_10x10;

   137       method = JDCT_ISLOW;	/* jidctint uses islow-style table */

   138       break;

   139     case ((11 << 8) + 11):

   140       method_ptr = jpeg_idct_11x11;

   141       method = JDCT_ISLOW;	/* jidctint uses islow-style table */

   142       break;

   143     case ((12 << 8) + 12):

   144       method_ptr = jpeg_idct_12x12;

   145       method = JDCT_ISLOW;	/* jidctint uses islow-style table */

   146       break;

   147     case ((13 << 8) + 13):

   148       method_ptr = jpeg_idct_13x13;

   149       method = JDCT_ISLOW;	/* jidctint uses islow-style table */

   150       break;

   151     case ((14 << 8) + 14):

   152       method_ptr = jpeg_idct_14x14;

   153       method = JDCT_ISLOW;	/* jidctint uses islow-style table */

   154       break;

   155     case ((15 << 8) + 15):

   156       method_ptr = jpeg_idct_15x15;

   157       method = JDCT_ISLOW;	/* jidctint uses islow-style table */

   158       break;

   159     case ((16 << 8) + 16):

   160       method_ptr = jpeg_idct_16x16;

   161       method = JDCT_ISLOW;	/* jidctint uses islow-style table */

   162       break;

   163     case ((16 << 8) + 8):

   164       method_ptr = jpeg_idct_16x8;

   165       method = JDCT_ISLOW;	/* jidctint uses islow-style table */

   166       break;

   167     case ((14 << 8) + 7):

   168       method_ptr = jpeg_idct_14x7;

   169       method = JDCT_ISLOW;	/* jidctint uses islow-style table */

   170       break;

   171     case ((12 << 8) + 6):

   172       method_ptr = jpeg_idct_12x6;

   173       method = JDCT_ISLOW;	/* jidctint uses islow-style table */

   174       break;

   175     case ((10 << 8) + 5):

   176       method_ptr = jpeg_idct_10x5;

   177       method = JDCT_ISLOW;	/* jidctint uses islow-style table */

   178       break;

   179     case ((8 << 8) + 4):

   180       method_ptr = jpeg_idct_8x4;

   181       method = JDCT_ISLOW;	/* jidctint uses islow-style table */

   182       break;

   183     case ((6 << 8) + 3):

   184       method_ptr = jpeg_idct_6x3;

   185       method = JDCT_ISLOW;	/* jidctint uses islow-style table */

   186       break;

   187     case ((4 << 8) + 2):

   188       method_ptr = jpeg_idct_4x2;

   189       method = JDCT_ISLOW;	/* jidctint uses islow-style table */

   190       break;

   191     case ((2 << 8) + 1):

   192       method_ptr = jpeg_idct_2x1;

   193       method = JDCT_ISLOW;	/* jidctint uses islow-style table */

   194       break;

   195     case ((8 << 8) + 16):

   196       method_ptr = jpeg_idct_8x16;

   197       method = JDCT_ISLOW;	/* jidctint uses islow-style table */

   198       break;

   199     case ((7 << 8) + 14):

   200       method_ptr = jpeg_idct_7x14;

   201       method = JDCT_ISLOW;	/* jidctint uses islow-style table */

   202       break;

   203     case ((6 << 8) + 12):

   204       method_ptr = jpeg_idct_6x12;

   205       method = JDCT_ISLOW;	/* jidctint uses islow-style table */

   206       break;

   207     case ((5 << 8) + 10):

   208       method_ptr = jpeg_idct_5x10;

   209       method = JDCT_ISLOW;	/* jidctint uses islow-style table */

   210       break;

   211     case ((4 << 8) + 8):

   212       method_ptr = jpeg_idct_4x8;

   213       method = JDCT_ISLOW;	/* jidctint uses islow-style table */

   214       break;

   215     case ((3 << 8) + 6):

   216       method_ptr = jpeg_idct_3x6;

   217       method = JDCT_ISLOW;	/* jidctint uses islow-style table */

   218       break;

   219     case ((2 << 8) + 4):

   220       method_ptr = jpeg_idct_2x4;

   221       method = JDCT_ISLOW;	/* jidctint uses islow-style table */

   222       break;

   223     case ((1 << 8) + 2):

   224       method_ptr = jpeg_idct_1x2;

   225       method = JDCT_ISLOW;	/* jidctint uses islow-style table */

   226       break;

   227 #endif

   228     case ((DCTSIZE << 8) + DCTSIZE):

   142       ERREXIT1(cinfo, JERR_BAD_DCTSIZE, compptr->DCT_scaled_size);

   254       ERREXIT2(cinfo, JERR_BAD_DCTSIZE,

   255 	       compptr->DCT_h_scaled_size, compptr->DCT_v_scaled_size);