Support additional scaling factors when decompressing

git-svn-id: svn://svn.code.sf.net/p/libjpeg-turbo/code/trunk@753 632fc199-4ca6-4c93-a231-07263d6284db

1 files changed, 49 insertions, 0 deletions

diff --git a/jddctmgr.c b/jddctmgr.c
index 044e469..1758bed 100644
--- a/jddctmgr.c
+++ b/jddctmgr.c
@@ -2,6 +2,7 @@
  * jddctmgr.c
  *
  * Copyright (C) 1994-1996, Thomas G. Lane.
+ * Modified 2002-2010 by Guido Vollbeding.
  * Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
  * Copyright (C) 2010, D. R. Commander.
  * This file is part of the Independent JPEG Group's software.
@@ -115,6 +116,10 @@ start_pass (j_decompress_ptr cinfo)
         method_ptr = jpeg_idct_2x2;
       method = JDCT_ISLOW;	/* jidctred uses islow-style table */
       break;
+    case 3:
+      method_ptr = jpeg_idct_3x3;
+      method = JDCT_ISLOW;	/* jidctint uses islow-style table */
+      break;
     case 4:
       if (jsimd_can_idct_4x4())
         method_ptr = jsimd_idct_4x4;
@@ -122,6 +127,18 @@ start_pass (j_decompress_ptr cinfo)
         method_ptr = jpeg_idct_4x4;
       method = JDCT_ISLOW;	/* jidctred uses islow-style table */
       break;
+    case 5:
+      method_ptr = jpeg_idct_5x5;
+      method = JDCT_ISLOW;	/* jidctint uses islow-style table */
+      break;
+    case 6:
+      method_ptr = jpeg_idct_6x6;
+      method = JDCT_ISLOW;	/* jidctint uses islow-style table */
+      break;
+    case 7:
+      method_ptr = jpeg_idct_7x7;
+      method = JDCT_ISLOW;	/* jidctint uses islow-style table */
+      break;
 #endif
     case DCTSIZE:
       switch (cinfo->dct_method) {
@@ -157,6 +174,38 @@ start_pass (j_decompress_ptr cinfo)
 	break;
       }
       break;
+    case 9:
+      method_ptr = jpeg_idct_9x9;
+      method = JDCT_ISLOW;	/* jidctint uses islow-style table */
+      break;
+    case 10:
+      method_ptr = jpeg_idct_10x10;
+      method = JDCT_ISLOW;	/* jidctint uses islow-style table */
+      break;
+    case 11:
+      method_ptr = jpeg_idct_11x11;
+      method = JDCT_ISLOW;	/* jidctint uses islow-style table */
+      break;
+    case 12:
+      method_ptr = jpeg_idct_12x12;
+      method = JDCT_ISLOW;	/* jidctint uses islow-style table */
+      break;
+    case 13:
+      method_ptr = jpeg_idct_13x13;
+      method = JDCT_ISLOW;	/* jidctint uses islow-style table */
+      break;
+    case 14:
+      method_ptr = jpeg_idct_14x14;
+      method = JDCT_ISLOW;	/* jidctint uses islow-style table */
+      break;
+    case 15:
+      method_ptr = jpeg_idct_15x15;
+      method = JDCT_ISLOW;	/* jidctint uses islow-style table */
+      break;
+    case 16:
+      method_ptr = jpeg_idct_16x16;
+      method = JDCT_ISLOW;	/* jidctint uses islow-style table */
+      break;
     default:
       ERREXIT1(cinfo, JERR_BAD_DCTSIZE, compptr->_DCT_scaled_size);
       break;