modules/javafx.graphics/src/main/native-iio/libjpeg7/jdcoefct.c

@@ -1,9 +1,10 @@
 /*
  * jdcoefct.c
  *
  * Copyright (C) 1994-1997, Thomas G. Lane.
+ * Modified 2002-2011 by Guido Vollbeding.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
  * This file contains the coefficient buffer controller for decompression.
  * This controller is the top level of the JPEG decompressor proper.

@@ -160,11 +161,12 @@
   for (yoffset = coef->MCU_vert_offset; yoffset < coef->MCU_rows_per_iMCU_row;
        yoffset++) {
     for (MCU_col_num = coef->MCU_ctr; MCU_col_num <= last_MCU_col;
          MCU_col_num++) {
       /* Try to fetch an MCU.  Entropy decoder expects buffer to be zeroed. */
-      jzero_far((void FAR *) coef->MCU_buffer[0],
+      if (cinfo->lim_Se)        /* can bypass in DC only case */
+        FMEMZERO((void FAR *) coef->MCU_buffer[0],
                 (size_t) (cinfo->blocks_in_MCU * SIZEOF(JBLOCK)));
       if (! (*cinfo->entropy->decode_mcu) (cinfo, coef->MCU_buffer)) {
         /* Suspension forced; update state counters and exit */
         coef->MCU_vert_offset = yoffset;
         coef->MCU_ctr = MCU_col_num;

@@ -727,10 +729,13 @@
       (*cinfo->mem->alloc_large) ((j_common_ptr) cinfo, JPOOL_IMAGE,
                                   D_MAX_BLOCKS_IN_MCU * SIZEOF(JBLOCK));
     for (i = 0; i < D_MAX_BLOCKS_IN_MCU; i++) {
       coef->MCU_buffer[i] = buffer + i;
     }
+    if (cinfo->lim_Se == 0)     /* DC only case: want to bypass later */
+      FMEMZERO((void FAR *) buffer,
+               (size_t) (D_MAX_BLOCKS_IN_MCU * SIZEOF(JBLOCK)));
     coef->pub.consume_data = dummy_consume_data;
     coef->pub.decompress_data = decompress_onepass;
     coef->pub.coef_arrays = NULL; /* flag for no virtual arrays */
   }
 }