ENH: Move the jpeg lib around, to match Insight toolkit structure (more tested)

[gdcm.git] / src / jpeg / libijg / jdscale.c

diff --git a/src/jpeg/libijg/jdscale.c b/src/jpeg/libijg/jdscale.c
deleted file mode 100644 (file)
index 9cdd9b7..0000000
--- a/src/jpeg/libijg/jdscale.c
+++ /dev/null
@@ -1,120 +0,0 @@
-/*
- * jdscale.c
- *
- * Copyright (C) 1998, Thomas G. Lane.
- * 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 sample scaling for lossless JPEG.  This is a
- * combination of upscaling the undifferenced sample by 2^Pt and downscaling
- * the sample to fit into JSAMPLE.
- */
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-#include "jlossls.h"    /* Private declarations for lossless codec */
-
-
-#ifdef D_LOSSLESS_SUPPORTED
-
-/*
- * Private scaler object for lossless decoding.
- */
-
-typedef struct {
-  int scale_factor;
-} scaler;
-
-typedef scaler * scaler_ptr;
-
-
-/*
- * Scalers for packing sample differences into JSAMPLEs.
- */
-
-METHODDEF(void)
-simple_upscale(j_decompress_ptr cinfo,
-         JDIFFROW diff_buf, JSAMPROW output_buf,
-         JDIMENSION width)
-{
-  j_lossless_d_ptr losslsd = (j_lossless_d_ptr) cinfo->codec;
-  scaler_ptr scaler = (scaler_ptr) losslsd->scaler_private;
-  int scale_factor = scaler->scale_factor;
-  unsigned int xindex;
-
-  for (xindex = 0; xindex < width; xindex++)
-    output_buf[xindex] = (JSAMPLE) (diff_buf[xindex] << scale_factor);
-}
-
-METHODDEF(void)
-simple_downscale(j_decompress_ptr cinfo,
-     JDIFFROW diff_buf, JSAMPROW output_buf,
-     JDIMENSION width)
-{
-  j_lossless_d_ptr losslsd = (j_lossless_d_ptr) cinfo->codec;
-  scaler_ptr scaler = (scaler_ptr) losslsd->scaler_private;
-  int scale_factor = scaler->scale_factor;
-  unsigned int xindex;
-  SHIFT_TEMPS
-
-  for (xindex = 0; xindex < width; xindex++)
-    output_buf[xindex] = (JSAMPLE) RIGHT_SHIFT(diff_buf[xindex], scale_factor);
-}
-
-METHODDEF(void)
-noscale(j_decompress_ptr cinfo,
-  JDIFFROW diff_buf, JSAMPROW output_buf,
-  JDIMENSION width)
-{
-  unsigned int xindex;
-  (void)cinfo;
-
-  for (xindex = 0; xindex < width; xindex++)
-    output_buf[xindex] = (JSAMPLE) diff_buf[xindex];
-}
-
-
-METHODDEF(void)
-scaler_start_pass (j_decompress_ptr cinfo)
-{
-  j_lossless_d_ptr losslsd = (j_lossless_d_ptr) cinfo->codec;
-  scaler_ptr scaler = (scaler_ptr) losslsd->scaler_private;
-  int downscale;
-
-  /*
-   * Downscale by the difference in the input vs. output precision.  If the
-   * output precision >= input precision, then do not downscale.
-   */
-  downscale = BITS_IN_JSAMPLE < cinfo->data_precision ?
-    cinfo->data_precision - BITS_IN_JSAMPLE : 0;
-
-  scaler->scale_factor = cinfo->Al - downscale;
-
-  /* Set scaler functions based on scale_factor (positive = left shift) */
-  if (scaler->scale_factor > 0)
-    losslsd->scaler_scale = simple_upscale;
-  else if (scaler->scale_factor < 0) {
-    scaler->scale_factor = -scaler->scale_factor;
-    losslsd->scaler_scale = simple_downscale;
-  }
-  else
-    losslsd->scaler_scale = noscale;
-}
-
-
-GLOBAL(void)
-jinit_d_scaler (j_decompress_ptr cinfo)
-{
-  j_lossless_d_ptr losslsd = (j_lossless_d_ptr) cinfo->codec;
-  scaler_ptr scaler;
-
-  scaler = (scaler_ptr)
-    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-        SIZEOF(scaler));
-  losslsd->scaler_private = (void *) scaler;
-  losslsd->scaler_start_pass = scaler_start_pass;
-}
-
-#endif /* D_LOSSLESS_SUPPORTED */
-