Adding upstream version 2.10.36.upstream/2.10.36

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 800 insertions, 0 deletions

diff --git a/plug-ins/common/sharpen.c b/plug-ins/common/sharpen.c
new file mode 100644
index 0000000..eeb0f64
--- /dev/null
+++ b/plug-ins/common/sharpen.c
@@ -0,0 +1,800 @@
+/*
+ * Sharpen filters for GIMP - The GNU Image Manipulation Program
+ *
+ * Copyright 1997-1998 Michael Sweet (mike@easysw.com)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "config.h"
+
+#include <string.h>
+
+#include <libgimp/gimp.h>
+#include <libgimp/gimpui.h>
+
+#include "libgimp/stdplugins-intl.h"
+
+/*
+ * Constants...
+ */
+
+#define PLUG_IN_PROC    "plug-in-sharpen"
+#define PLUG_IN_BINARY  "sharpen"
+#define PLUG_IN_ROLE    "gimp-sharpen"
+#define PLUG_IN_VERSION "1.4.2 - 3 June 1998"
+#define SCALE_WIDTH     100
+
+/*
+ * Local functions...
+ */
+
+static void     query (void);
+static void     run   (const gchar      *name,
+                       gint              nparams,
+                       const GimpParam  *param,
+                       gint             *nreturn_vals,
+                       GimpParam       **returm_vals);
+
+static void     compute_luts   (void);
+static void     sharpen        (GimpDrawable *drawable);
+
+static gboolean sharpen_dialog (GimpDrawable *drawable);
+
+static void     preview_update (GimpPreview  *preview,
+                                GimpDrawable *drawable);
+
+typedef gint32 intneg;
+typedef gint32 intpos;
+
+static void     gray_filter  (int width, guchar *src, guchar *dst, intneg *neg0,
+                              intneg *neg1, intneg *neg2);
+static void     graya_filter (int width, guchar *src, guchar *dst, intneg *neg0,
+                              intneg *neg1, intneg *neg2);
+static void     rgb_filter   (int width, guchar *src, guchar *dst, intneg *neg0,
+                              intneg *neg1, intneg *neg2);
+static void     rgba_filter  (int width, guchar *src, guchar *dst, intneg *neg0,
+                              intneg *neg1, intneg *neg2);
+
+
+/*
+ * Globals...
+ */
+
+const GimpPlugInInfo PLUG_IN_INFO =
+{
+  NULL,  /* init_proc  */
+  NULL,  /* quit_proc  */
+  query, /* query_proc */
+  run    /* run_proc   */
+};
+
+typedef struct
+{
+  gint  sharpen_percent;
+} SharpenParams;
+
+static SharpenParams sharpen_params =
+{
+  10
+};
+
+static intneg neg_lut[256];   /* Negative coefficient LUT */
+static intpos pos_lut[256];   /* Positive coefficient LUT */
+
+
+MAIN ()
+
+static void
+query (void)
+{
+  static const GimpParamDef   args[] =
+  {
+    { GIMP_PDB_INT32,    "run-mode", "The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }"      },
+    { GIMP_PDB_IMAGE,    "image",    "Input image"                       },
+    { GIMP_PDB_DRAWABLE, "drawable", "Input drawable"                    },
+    { GIMP_PDB_INT32,    "percent",  "Percent sharpening (default = 10)" }
+  };
+
+  gimp_install_procedure (PLUG_IN_PROC,
+                          N_("Make image sharper "
+                             "(less powerful than Unsharp Mask)"),
+                          "This plug-in selectively performs a convolution "
+                          "filter on an image.",
+                          "Michael Sweet <mike@easysw.com>",
+                          "Copyright 1997-1998 by Michael Sweet",
+                          PLUG_IN_VERSION,
+                          N_("_Sharpen..."),
+                          "RGB*, GRAY*",
+                          GIMP_PLUGIN,
+                          G_N_ELEMENTS (args), 0,
+                          args, NULL);
+}
+
+static void
+run (const gchar      *name,
+     gint              nparams,
+     const GimpParam  *param,
+     gint             *nreturn_vals,
+     GimpParam       **return_vals)
+{
+  static GimpParam   values[1]; /* Return values */
+  GimpRunMode        run_mode;  /* Current run mode */
+  GimpPDBStatusType  status;    /* Return status */
+  GimpDrawable      *drawable;  /* Current image */
+
+  /*
+   * Initialize parameter data...
+   */
+
+  status   = GIMP_PDB_SUCCESS;
+  run_mode = param[0].data.d_int32;
+
+  INIT_I18N ();
+
+  *nreturn_vals = 1;
+  *return_vals  = values;
+
+  values[0].type          = GIMP_PDB_STATUS;
+  values[0].data.d_status = status;
+
+  /*
+   * Get drawable information...
+   */
+
+  drawable = gimp_drawable_get (param[2].data.d_drawable);
+  gimp_tile_cache_ntiles (2 * drawable->ntile_cols);
+
+
+  /*
+   * See how we will run
+   */
+
+  switch (run_mode)
+    {
+    case GIMP_RUN_INTERACTIVE:
+      /*
+       * Possibly retrieve data...
+       */
+      gimp_get_data (PLUG_IN_PROC, &sharpen_params);
+
+      /*
+       * Get information from the dialog...
+       */
+      if (!sharpen_dialog (drawable))
+        return;
+      break;
+
+    case GIMP_RUN_NONINTERACTIVE:
+      /*
+       * Make sure all the arguments are present...
+       */
+      if (nparams != 4)
+        status = GIMP_PDB_CALLING_ERROR;
+      else
+        sharpen_params.sharpen_percent = param[3].data.d_int32;
+      break;
+
+    case GIMP_RUN_WITH_LAST_VALS:
+      /*
+       * Possibly retrieve data...
+       */
+      gimp_get_data (PLUG_IN_PROC, &sharpen_params);
+      break;
+
+    default:
+      status = GIMP_PDB_CALLING_ERROR;
+      break;
+    }
+
+  /*
+   * Sharpen the image...
+   */
+
+  if (status == GIMP_PDB_SUCCESS)
+    {
+      if ((gimp_drawable_is_rgb (drawable->drawable_id) ||
+           gimp_drawable_is_gray (drawable->drawable_id)))
+        {
+          /*
+           * Run!
+           */
+          sharpen (drawable);
+
+          /*
+           * If run mode is interactive, flush displays...
+           */
+          if (run_mode != GIMP_RUN_NONINTERACTIVE)
+            gimp_displays_flush ();
+
+          /*
+           * Store data...
+           */
+          if (run_mode == GIMP_RUN_INTERACTIVE)
+            gimp_set_data (PLUG_IN_PROC,
+                           &sharpen_params, sizeof (SharpenParams));
+        }
+      else
+        status = GIMP_PDB_EXECUTION_ERROR;
+    }
+
+  /*
+   * Reset the current run status...
+   */
+  values[0].data.d_status = status;
+
+  /*
+   * Detach from the drawable...
+   */
+  gimp_drawable_detach (drawable);
+}
+
+
+static void
+compute_luts (void)
+{
+  gint i;       /* Looping var */
+  gint fact;    /* 1 - sharpness */
+
+  fact = 100 - sharpen_params.sharpen_percent;
+  if (fact < 1)
+    fact = 1;
+
+  for (i = 0; i < 256; i ++)
+    {
+      pos_lut[i] = 800 * i / fact;
+      neg_lut[i] = (4 + pos_lut[i] - (i << 3)) >> 3;
+    }
+}
+
+/*
+ * 'sharpen()' - Sharpen an image using a convolution filter.
+ */
+
+static void
+sharpen (GimpDrawable *drawable)
+{
+  GimpPixelRgn  src_rgn;        /* Source image region */
+  GimpPixelRgn  dst_rgn;        /* Destination image region */
+  guchar       *src_rows[4];    /* Source pixel rows */
+  guchar       *src_ptr;        /* Current source pixel */
+  guchar       *dst_row;        /* Destination pixel row */
+  intneg       *neg_rows[4];    /* Negative coefficient rows */
+  intneg       *neg_ptr;        /* Current negative coefficient */
+  gint          i;              /* Looping vars */
+  gint          y;              /* Current location in image */
+  gint          row;            /* Current row in src_rows */
+  gint          count;          /* Current number of filled src_rows */
+  gint          width;          /* Byte width of the image */
+  gint          x1;             /* Selection bounds */
+  gint          y1;
+  gint          y2;
+  gint          sel_width;      /* Selection width */
+  gint          sel_height;     /* Selection height */
+  gint          img_bpp;        /* Bytes-per-pixel in image */
+  void          (*filter)(int, guchar *, guchar *, intneg *, intneg *, intneg *);
+
+  filter = NULL;
+
+  if (! gimp_drawable_mask_intersect (drawable->drawable_id,
+                                      &x1, &y1, &sel_width, &sel_height))
+    return;
+
+  y2 = y1 + sel_height;
+
+  img_bpp = gimp_drawable_bpp (drawable->drawable_id);
+
+  /*
+   * Let the user know what we're doing...
+   */
+  gimp_progress_init (_("Sharpening"));
+
+  /*
+   * Setup for filter...
+   */
+
+  gimp_pixel_rgn_init (&src_rgn, drawable,
+                       x1, y1, sel_width, sel_height, FALSE, FALSE);
+  gimp_pixel_rgn_init (&dst_rgn, drawable,
+                       x1, y1, sel_width, sel_height, TRUE, TRUE);
+
+  compute_luts ();
+
+  width = sel_width * img_bpp;
+
+  for (row = 0; row < 4; row ++)
+    {
+      src_rows[row] = g_new (guchar, width);
+      neg_rows[row] = g_new (intneg, width);
+    }
+
+  dst_row = g_new (guchar, width);
+
+  /*
+   * Pre-load the first row for the filter...
+   */
+
+  gimp_pixel_rgn_get_row (&src_rgn, src_rows[0], x1, y1, sel_width);
+
+  for (i = width, src_ptr = src_rows[0], neg_ptr = neg_rows[0];
+       i > 0;
+       i --, src_ptr ++, neg_ptr ++)
+    *neg_ptr = neg_lut[*src_ptr];
+
+  row   = 1;
+  count = 1;
+
+  /*
+   * Select the filter...
+   */
+
+  switch (img_bpp)
+    {
+    case 1 :
+      filter = gray_filter;
+      break;
+    case 2 :
+      filter = graya_filter;
+      break;
+    case 3 :
+      filter = rgb_filter;
+      break;
+    case 4 :
+      filter = rgba_filter;
+      break;
+    };
+
+  /*
+   * Sharpen...
+   */
+
+  for (y = y1; y < y2; y ++)
+    {
+      /*
+       * Load the next pixel row...
+       */
+
+      if ((y + 1) < y2)
+        {
+          /*
+           * Check to see if our src_rows[] array is overflowing yet...
+           */
+
+          if (count >= 3)
+            count --;
+
+          /*
+           * Grab the next row...
+           */
+
+          gimp_pixel_rgn_get_row (&src_rgn, src_rows[row],
+                                  x1, y + 1, sel_width);
+          for (i = width, src_ptr = src_rows[row], neg_ptr = neg_rows[row];
+               i > 0;
+               i --, src_ptr ++, neg_ptr ++)
+            *neg_ptr = neg_lut[*src_ptr];
+
+          count ++;
+          row = (row + 1) & 3;
+        }
+      else
+        {
+          /*
+           * No more pixels at the bottom...  Drop the oldest samples...
+           */
+
+          count --;
+        }
+
+      /*
+       * Now sharpen pixels and save the results...
+       */
+
+      if (count == 3)
+        {
+          (* filter) (sel_width, src_rows[(row + 2) & 3], dst_row,
+                      neg_rows[(row + 1) & 3] + img_bpp,
+                      neg_rows[(row + 2) & 3] + img_bpp,
+                      neg_rows[(row + 3) & 3] + img_bpp);
+
+          /*
+           * Set the row...
+           */
+
+          gimp_pixel_rgn_set_row (&dst_rgn, dst_row, x1, y, sel_width);
+        }
+      else if (count == 2)
+        {
+          if (y == y1)      /* first row */
+            gimp_pixel_rgn_set_row (&dst_rgn, src_rows[0],
+                                    x1, y, sel_width);
+          else                  /* last row  */
+            gimp_pixel_rgn_set_row (&dst_rgn, src_rows[(sel_height - 1) & 3],
+                                    x1, y, sel_width);
+        }
+
+      if ((y & 15) == 0)
+        gimp_progress_update ((gdouble) (y - y1) / (gdouble) sel_height);
+    }
+
+  /*
+   * OK, we're done.  Free all memory used...
+   */
+
+  for (row = 0; row < 4; row ++)
+    {
+      g_free (src_rows[row]);
+      g_free (neg_rows[row]);
+    }
+
+  g_free (dst_row);
+
+  /*
+   * Update the screen...
+   */
+
+  gimp_progress_update (1.0);
+  gimp_drawable_flush (drawable);
+  gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
+  gimp_drawable_update (drawable->drawable_id,
+                        x1, y1, sel_width, sel_height);
+}
+
+
+/*
+ * 'sharpen_dialog()' - Popup a dialog window for the filter box size...
+ */
+
+static gboolean
+sharpen_dialog (GimpDrawable *drawable)
+{
+  GtkWidget *dialog;
+  GtkWidget *main_vbox;
+  GtkWidget *preview;
+  GtkWidget *table;
+  GtkObject *adj;
+  gboolean   run;
+
+  gimp_ui_init (PLUG_IN_BINARY, TRUE);
+
+  dialog = gimp_dialog_new (_("Sharpen"), PLUG_IN_ROLE,
+                            NULL, 0,
+                            gimp_standard_help_func, PLUG_IN_PROC,
+
+                            _("_Cancel"), GTK_RESPONSE_CANCEL,
+                            _("_OK"),     GTK_RESPONSE_OK,
+
+                            NULL);
+
+  gtk_dialog_set_alternative_button_order (GTK_DIALOG (dialog),
+                                           GTK_RESPONSE_OK,
+                                           GTK_RESPONSE_CANCEL,
+                                           -1);
+
+  gimp_window_set_transient (GTK_WINDOW (dialog));
+
+  main_vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
+  gtk_container_set_border_width (GTK_CONTAINER (main_vbox), 12);
+  gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (dialog))),
+                      main_vbox, TRUE, TRUE, 0);
+  gtk_widget_show (main_vbox);
+
+  preview = gimp_drawable_preview_new_from_drawable_id (drawable->drawable_id);
+  gtk_box_pack_start (GTK_BOX (main_vbox), preview, TRUE, TRUE, 0);
+  gtk_widget_show (preview);
+
+  g_signal_connect (preview, "invalidated",
+                    G_CALLBACK (preview_update),
+                    drawable);
+
+  table = gtk_table_new (1, 3, FALSE);
+  gtk_table_set_col_spacings (GTK_TABLE (table), 6);
+  gtk_box_pack_start (GTK_BOX (main_vbox), table, FALSE, FALSE, 0);
+  gtk_widget_show (table);
+
+  adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 0,
+                              _("_Sharpness:"), SCALE_WIDTH, 0,
+                              sharpen_params.sharpen_percent,
+                              1, 99, 1, 10, 0,
+                              TRUE, 0, 0,
+                              NULL, NULL);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (gimp_int_adjustment_update),
+                    &sharpen_params.sharpen_percent);
+  g_signal_connect_swapped (adj, "value-changed",
+                            G_CALLBACK (gimp_preview_invalidate),
+                            preview);
+
+  gtk_widget_show (dialog);
+
+  run = (gimp_dialog_run (GIMP_DIALOG (dialog)) == GTK_RESPONSE_OK);
+
+  gtk_widget_destroy (dialog);
+
+  return run;
+}
+
+static void
+preview_update (GimpPreview  *preview,
+                GimpDrawable *drawable)
+{
+  GimpPixelRgn  src_rgn;        /* Source image region */
+  guchar       *src_ptr;        /* Current source pixel */
+  guchar       *dst_ptr;        /* Current destination pixel */
+  intneg       *neg_ptr;        /* Current negative pixel */
+  gint          i;              /* Looping var */
+  gint          y;              /* Current location in image */
+  gint          width;          /* Byte width of the image */
+  gint          x1, y1;
+  gint          preview_width, preview_height;
+  guchar       *preview_src, *preview_dst;
+  intneg       *preview_neg;
+  gint          img_bpp;        /* Bytes-per-pixel in image */
+
+  void          (*filter)(int, guchar *, guchar *, intneg *, intneg *, intneg *);
+
+  filter = NULL;
+
+  compute_luts();
+
+  gimp_preview_get_position (preview, &x1, &y1);
+  gimp_preview_get_size (preview, &preview_width, &preview_height);
+
+  img_bpp = gimp_drawable_bpp (drawable->drawable_id);
+
+
+  preview_src = g_new (guchar, preview_width * preview_height * img_bpp);
+  preview_neg = g_new (intneg, preview_width * preview_height * img_bpp);
+  preview_dst = g_new (guchar, preview_width * preview_height * img_bpp);
+
+  gimp_pixel_rgn_init (&src_rgn, drawable,
+                       x1, y1, preview_width, preview_height,
+                       FALSE, FALSE);
+
+  width = preview_width * img_bpp;
+
+  /*
+   * Load the preview area...
+   */
+
+  gimp_pixel_rgn_get_rect (&src_rgn, preview_src, x1, y1,
+                           preview_width, preview_height);
+
+  for (i = width * preview_height, src_ptr = preview_src, neg_ptr = preview_neg;
+       i > 0;
+       i --)
+    *neg_ptr++ = neg_lut[*src_ptr++];
+
+  /*
+   * Select the filter...
+   */
+
+  switch (img_bpp)
+    {
+    case 1:
+      filter = gray_filter;
+      break;
+    case 2:
+      filter = graya_filter;
+      break;
+    case 3:
+      filter = rgb_filter;
+      break;
+    case 4:
+      filter = rgba_filter;
+      break;
+    default:
+      g_error ("Programmer stupidity error: img_bpp is %d\n",
+               img_bpp);
+    }
+
+  /*
+   * Sharpen...
+   */
+
+  memcpy (preview_dst, preview_src, width);
+  memcpy (preview_dst + width * (preview_height - 1),
+          preview_src + width * (preview_height - 1),
+          width);
+
+  for (y = preview_height - 2, src_ptr = preview_src + width,
+           neg_ptr = preview_neg + width + img_bpp,
+           dst_ptr = preview_dst + width;
+       y > 0;
+       y --, src_ptr += width, neg_ptr += width, dst_ptr += width)
+    (*filter)(preview_width, src_ptr, dst_ptr, neg_ptr - width,
+              neg_ptr, neg_ptr + width);
+
+  gimp_preview_draw_buffer (preview, preview_dst, preview_width * img_bpp);
+
+  g_free (preview_src);
+  g_free (preview_neg);
+  g_free (preview_dst);
+}
+
+/*
+ * 'gray_filter()' - Sharpen grayscale pixels.
+ */
+
+static void
+gray_filter (gint    width,     /* I - Width of line in pixels */
+             guchar *src,       /* I - Source line */
+             guchar *dst,       /* O - Destination line */
+             intneg *neg0,      /* I - Top negative coefficient line */
+             intneg *neg1,      /* I - Middle negative coefficient line */
+             intneg *neg2)      /* I - Bottom negative coefficient line */
+{
+  intpos pixel;         /* New pixel value */
+
+  *dst++ = *src++;
+  width -= 2;
+
+  while (width > 0)
+    {
+      pixel = (pos_lut[*src++] - neg0[-1] - neg0[0] - neg0[1] -
+               neg1[-1] - neg1[1] -
+               neg2[-1] - neg2[0] - neg2[1]);
+      pixel = (pixel + 4) >> 3;
+      *dst++ = CLAMP0255 (pixel);
+
+      neg0 ++;
+      neg1 ++;
+      neg2 ++;
+      width --;
+    }
+
+  *dst++ = *src++;
+}
+
+/*
+ * 'graya_filter()' - Sharpen grayscale+alpha pixels.
+ */
+
+static void
+graya_filter (gint   width,     /* I - Width of line in pixels */
+              guchar *src,      /* I - Source line */
+              guchar *dst,      /* O - Destination line */
+              intneg *neg0,     /* I - Top negative coefficient line */
+              intneg *neg1,     /* I - Middle negative coefficient line */
+              intneg *neg2)     /* I - Bottom negative coefficient line */
+{
+  intpos pixel;         /* New pixel value */
+
+  *dst++ = *src++;
+  *dst++ = *src++;
+  width -= 2;
+
+  while (width > 0)
+    {
+      pixel = (pos_lut[*src++] - neg0[-2] - neg0[0] - neg0[2] -
+               neg1[-2] - neg1[2] -
+               neg2[-2] - neg2[0] - neg2[2]);
+      pixel = (pixel + 4) >> 3;
+      *dst++ = CLAMP0255 (pixel);
+
+      *dst++ = *src++;
+      neg0 += 2;
+      neg1 += 2;
+      neg2 += 2;
+      width --;
+    }
+
+  *dst++ = *src++;
+  *dst++ = *src++;
+}
+
+/*
+ * 'rgb_filter()' - Sharpen RGB pixels.
+ */
+
+static void
+rgb_filter (gint    width,      /* I - Width of line in pixels */
+            guchar *src,        /* I - Source line */
+            guchar *dst,        /* O - Destination line */
+            intneg *neg0,       /* I - Top negative coefficient line */
+            intneg *neg1,       /* I - Middle negative coefficient line */
+            intneg *neg2)       /* I - Bottom negative coefficient line */
+{
+  intpos pixel;         /* New pixel value */
+
+  *dst++ = *src++;
+  *dst++ = *src++;
+  *dst++ = *src++;
+  width -= 2;
+
+  while (width > 0)
+    {
+      pixel = (pos_lut[*src++] - neg0[-3] - neg0[0] - neg0[3] -
+               neg1[-3] - neg1[3] -
+               neg2[-3] - neg2[0] - neg2[3]);
+      pixel = (pixel + 4) >> 3;
+      *dst++ = CLAMP0255 (pixel);
+
+      pixel = (pos_lut[*src++] - neg0[-2] - neg0[1] - neg0[4] -
+               neg1[-2] - neg1[4] -
+               neg2[-2] - neg2[1] - neg2[4]);
+      pixel = (pixel + 4) >> 3;
+      *dst++ = CLAMP0255 (pixel);
+
+      pixel = (pos_lut[*src++] - neg0[-1] - neg0[2] - neg0[5] -
+               neg1[-1] - neg1[5] -
+               neg2[-1] - neg2[2] - neg2[5]);
+      pixel = (pixel + 4) >> 3;
+      *dst++ = CLAMP0255 (pixel);
+
+      neg0 += 3;
+      neg1 += 3;
+      neg2 += 3;
+      width --;
+    }
+
+  *dst++ = *src++;
+  *dst++ = *src++;
+  *dst++ = *src++;
+}
+
+/*
+ * 'rgba_filter()' - Sharpen RGBA pixels.
+ */
+
+static void
+rgba_filter (gint   width,      /* I - Width of line in pixels */
+             guchar *src,       /* I - Source line */
+             guchar *dst,       /* O - Destination line */
+             intneg *neg0,      /* I - Top negative coefficient line */
+             intneg *neg1,      /* I - Middle negative coefficient line */
+             intneg *neg2)      /* I - Bottom negative coefficient line */
+{
+  intpos pixel;         /* New pixel value */
+
+  *dst++ = *src++;
+  *dst++ = *src++;
+  *dst++ = *src++;
+  *dst++ = *src++;
+  width -= 2;
+
+  while (width > 0)
+    {
+      pixel = (pos_lut[*src++] - neg0[-4] - neg0[0] - neg0[4] -
+               neg1[-4] - neg1[4] -
+               neg2[-4] - neg2[0] - neg2[4]);
+      pixel = (pixel + 4) >> 3;
+      *dst++ = CLAMP0255 (pixel);
+
+      pixel = (pos_lut[*src++] - neg0[-3] - neg0[1] - neg0[5] -
+               neg1[-3] - neg1[5] -
+               neg2[-3] - neg2[1] - neg2[5]);
+      pixel = (pixel + 4) >> 3;
+      *dst++ = CLAMP0255 (pixel);
+
+      pixel = (pos_lut[*src++] - neg0[-2] - neg0[2] - neg0[6] -
+               neg1[-2] - neg1[6] -
+               neg2[-2] - neg2[2] - neg2[6]);
+      pixel = (pixel + 4) >> 3;
+      *dst++ = CLAMP0255 (pixel);
+
+      *dst++ = *src++;
+
+      neg0 += 4;
+      neg1 += 4;
+      neg2 += 4;
+      width --;
+    }
+
+  *dst++ = *src++;
+  *dst++ = *src++;
+  *dst++ = *src++;
+  *dst++ = *src++;
+}