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

*** 1,9 ****
--- 1,10 ----
  /*
   * jddctmgr.c
   *
   * Copyright (C) 1994-1996, Thomas G. Lane.
+  * Modified 2002-2013 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 inverse-DCT management logic.
   * This code selects a particular IDCT implementation to be used,
*** 322,331 ****
--- 323,333 ----
        {
          /* For float AA&N IDCT method, multipliers are equal to quantization
           * coefficients scaled by scalefactor[row]*scalefactor[col], where
           *   scalefactor[0] = 1
           *   scalefactor[k] = cos(k*PI/16) * sqrt(2)    for k=1..7
+          * We apply a further scale factor of 1/8.
           */
          FLOAT_MULT_TYPE * fmtbl = (FLOAT_MULT_TYPE *) compptr->dct_table;
          int row, col;
          static const double aanscalefactor[DCTSIZE] = {
            1.0, 1.387039845, 1.306562965, 1.175875602,
*** 335,345 ****
          i = 0;
          for (row = 0; row < DCTSIZE; row++) {
            for (col = 0; col < DCTSIZE; col++) {
              fmtbl[i] = (FLOAT_MULT_TYPE)
                ((double) qtbl->quantval[i] *
!                aanscalefactor[row] * aanscalefactor[col]);
              i++;
            }
          }
        }
        break;
--- 337,347 ----
          i = 0;
          for (row = 0; row < DCTSIZE; row++) {
            for (col = 0; col < DCTSIZE; col++) {
              fmtbl[i] = (FLOAT_MULT_TYPE)
                ((double) qtbl->quantval[i] *
!                aanscalefactor[row] * aanscalefactor[col] * 0.125);
              i++;
            }
          }
        }
        break;
*** 364,374 ****
    jpeg_component_info *compptr;
  
    idct = (my_idct_ptr)
      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
                                  SIZEOF(my_idct_controller));
!   cinfo->idct = (struct jpeg_inverse_dct *) idct;
    idct->pub.start_pass = start_pass;
  
    for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
         ci++, compptr++) {
      /* Allocate and pre-zero a multiplier table for each component */
--- 366,376 ----
    jpeg_component_info *compptr;
  
    idct = (my_idct_ptr)
      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
                                  SIZEOF(my_idct_controller));
!   cinfo->idct = &idct->pub;
    idct->pub.start_pass = start_pass;
  
    for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
         ci++, compptr++) {
      /* Allocate and pre-zero a multiplier table for each component */