コード例 #1
0
ファイル: jquant1.c プロジェクト: a-team/wormux
jinit_1pass_quantizer (j_decompress_ptr cinfo)
{
  my_cquantize_ptr cquantize;

  cquantize = (my_cquantize_ptr)
    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
       SIZEOF(my_cquantizer));
  cinfo->cquantize = (struct jpeg_color_quantizer *) cquantize;
  cquantize->pub.start_pass = start_pass_1_quant;
  cquantize->pub.finish_pass = finish_pass_1_quant;
  cquantize->pub.new_color_map = new_color_map_1_quant;
  cquantize->fserrors[0] = NULL; /* Flag FS workspace not allocated */
  cquantize->odither[0] = NULL;  /* Also flag odither arrays not allocated */

  /* Make sure my internal arrays won't overflow */
  if (cinfo->out_color_components > MAX_Q_COMPS)
    ERREXIT1(cinfo, JERR_QUANT_COMPONENTS, MAX_Q_COMPS);
  /* Make sure colormap indexes can be represented by JSAMPLEs */
  if (cinfo->desired_number_of_colors > (MAXJSAMPLE+1))
    ERREXIT1(cinfo, JERR_QUANT_MANY_COLORS, MAXJSAMPLE+1);

  /* Create the colormap and color index table. */
  create_colormap(cinfo);
  create_colorindex(cinfo);

  /* Allocate Floyd-Steinberg workspace now if requested.
   * We do this now since it is FAR storage and may affect the memory
   * manager's space calculations.  If the user changes to FS dither
   * mode in a later pass, we will allocate the space then, and will
   * possibly overrun the max_memory_to_use setting.
   */
  if (cinfo->dither_mode == JDITHER_FS)
    alloc_fs_workspace(cinfo);
}
コード例 #2
0
ファイル: jquant1.c プロジェクト: vdm113/wxWidgets-ICC-patch
start_pass_1_quant (j_decompress_ptr cinfo, wxjpeg_boolean is_pre_scan)
{
  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
  size_t arraysize;
  int i;

  /* Install my colormap. */
  cinfo->colormap = cquantize->sv_colormap;
  cinfo->actual_number_of_colors = cquantize->sv_actual;

  /* Initialize for desired dithering mode. */
  switch (cinfo->dither_mode) {
  case JDITHER_NONE:
    if (cinfo->out_color_components == 3)
      cquantize->pub.color_quantize = color_quantize3;
    else
      cquantize->pub.color_quantize = color_quantize;
    break;
  case JDITHER_ORDERED:
    if (cinfo->out_color_components == 3)
      cquantize->pub.color_quantize = quantize3_ord_dither;
    else
      cquantize->pub.color_quantize = quantize_ord_dither;
    cquantize->row_index = 0;	/* initialize state for ordered dither */
    /* If user changed to ordered dither from another mode,
     * we must recreate the color index table with padding.
     * This will cost extra space, but probably isn't very likely.
     */
    if (! cquantize->is_padded)
      create_colorindex(cinfo);
    /* Create ordered-dither tables if we didn't already. */
    if (cquantize->odither[0] == NULL)
      create_odither_tables(cinfo);
    break;
  case JDITHER_FS:
    cquantize->pub.color_quantize = quantize_fs_dither;
    cquantize->on_odd_row = FALSE; /* initialize state for F-S dither */
    /* Allocate Floyd-Steinberg workspace if didn't already. */
    if (cquantize->fserrors[0] == NULL)
      alloc_fs_workspace(cinfo);
    /* Initialize the propagated errors to zero. */
    arraysize = (size_t) ((cinfo->output_width + 2) * SIZEOF(FSERROR));
#if defined(__INTEL_COMPILER) && 1 /* VDM auto patch */
#   pragma ivdep
#   pragma swp
#   pragma unroll
#   pragma prefetch
#   if 0
#       pragma simd noassert
#   endif
#endif /* VDM auto patch */
    for (i = 0; i < cinfo->out_color_components; i++)
      jzero_far((void FAR *) cquantize->fserrors[i], arraysize);
    break;
  default:
    ERREXIT(cinfo, JERR_NOT_COMPILED);
    break;
  }
}