示例#1
0
static void
preview_update (GtkWidget *widget)
{
  GimpPixelRgn  src_rgn;        /* Source image region */
  guchar       *dst;            /* Output image */
  GimpPreview  *preview;        /* The preview widget */
  guchar       *src;            /* Source pixel rows */
  gint          img_bpp;
  gint          x1,y1;
  gint          width, height;

  preview = GIMP_PREVIEW (widget);

  img_bpp = gimp_drawable_bpp (drawable->drawable_id);

  gimp_preview_get_size (preview, &width, &height);
  gimp_preview_get_position (preview, &x1, &y1);

  gimp_pixel_rgn_init (&src_rgn, drawable, x1, y1, width, height, FALSE, FALSE);

  dst = g_new (guchar, width * height * img_bpp);
  src = g_new (guchar, width * height * img_bpp);

  gimp_pixel_rgn_get_rect (&src_rgn, src, x1, y1, width, height);

  despeckle_median (src, dst, width, height, img_bpp, despeckle_radius, TRUE);

  gimp_preview_draw_buffer (preview, dst, width * img_bpp);

  g_free (src);
  g_free (dst);
}
示例#2
0
文件: dog.c 项目: Amerekanets/gimp
static void
preview_update_preview (GimpPreview  *preview,
                        GimpDrawable *drawable)
{
  gint          x1, y1;
  gint          width, height;
  gint          bpp;
  guchar       *buffer;
  GimpPixelRgn  src_rgn;
  GimpPixelRgn  preview_rgn;
  gint32        image_id, src_image_id;
  gint32        preview_id;
  GimpDrawable *preview_drawable;

  bpp = gimp_drawable_bpp (drawable->drawable_id);

  gimp_preview_get_position (preview, &x1, &y1);
  gimp_preview_get_size (preview, &width, &height);

  buffer = g_new (guchar, width * height * bpp);

  gimp_pixel_rgn_init (&src_rgn, drawable,
                       x1, y1, width, height, FALSE, FALSE);
  gimp_pixel_rgn_get_rect (&src_rgn, buffer,
                           x1, y1, width, height);

  /* set up gimp drawable for rendering preview into */
  src_image_id = gimp_drawable_get_image (drawable->drawable_id);
  image_id = gimp_image_new (width, height,
                             gimp_image_base_type (src_image_id));
  preview_id = gimp_layer_new (image_id, "preview", width, height,
                               gimp_drawable_type (drawable->drawable_id),
                               100,
                               GIMP_NORMAL_MODE);
  preview_drawable = gimp_drawable_get (preview_id);
  gimp_image_add_layer (image_id, preview_id, 0);
  gimp_layer_set_offsets (preview_id, 0, 0);
  gimp_pixel_rgn_init (&preview_rgn, preview_drawable,
                       0, 0, width, height, TRUE, TRUE);
  gimp_pixel_rgn_set_rect (&preview_rgn, buffer,
                           0, 0, width, height);
  gimp_drawable_flush (preview_drawable);
  gimp_drawable_merge_shadow (preview_id, TRUE);
  gimp_drawable_update (preview_id, 0, 0, width, height);

  dog (image_id, preview_drawable, dogvals.inner, dogvals.outer, FALSE);

  gimp_pixel_rgn_get_rect (&preview_rgn, buffer,
                           0, 0, width, height);

  gimp_preview_draw_buffer (preview, buffer, width * bpp);

  gimp_image_delete (image_id);
  g_free (buffer);
}
示例#3
0
// Combine wavelets with latest FFT result and show output in the preview widget
void wavelet_preview(PluginData *pd)
{
	int x, y, w, h;
	gimp_preview_get_position (GIMP_PREVIEW(pd->preview), &x, &y);
	gimp_preview_get_size (GIMP_PREVIEW(pd->preview), &w, &h);
	gimp_pixel_rgn_init (&pd->region, pd->drawable, 0, 0, pd->image_width, pd->image_height, FALSE, TRUE);
	wavelet_apply(pd, x, y, w, h);
	
	gimp_pixel_rgn_set_rect(&pd->region, pd->img_pixels, x, y, w, h);
	gimp_drawable_preview_draw_region(GIMP_DRAWABLE_PREVIEW(pd->preview), &pd->region);
}
示例#4
0
文件: mblur.c 项目: Amerekanets/gimp
static void
mblur (GimpDrawable *drawable,
       GimpPreview  *preview)
{
  gint x, y;
  gint width, height;

  if (preview)
    {
      gimp_preview_get_position (preview, &x, &y);
      gimp_preview_get_size (preview, &width, &height);
    }
  else
    {
      gimp_drawable_mask_bounds (drawable->drawable_id,
                                 &x, &y, &width, &height);
      width  -= x;
      height -= y;
    }

  if (width < 1 || height < 1)
    return;

  if (! preview)
    gimp_progress_init (_("Motion blurring"));

  switch (mbvals.mblur_type)
    {
    case MBLUR_LINEAR:
      mblur_linear (drawable, preview, x, y, width, height);
      break;

    case MBLUR_RADIAL:
      mblur_radial (drawable, preview, x, y, width, height);
      break;

    case MBLUR_ZOOM:
      mblur_zoom (drawable, preview, x, y, width, height);
      break;

    default:
      break;
    }

  if (! preview)
    {
      gimp_drawable_flush (drawable);
      gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
      gimp_drawable_update (drawable->drawable_id, x, y, width, height);
    }
}
示例#5
0
static void
color_to_alpha_preview (GimpPreview  *preview,
                        GimpDrawable *drawable)
{
  GimpPixelRgn  src_rgn;
  gint          x, y;
  gint          width, height;
  gint          bpp;
  gint          i;
  guchar       *src, *dest;

  bpp = drawable->bpp;
  gimp_preview_get_position (preview, &x, &y);
  gimp_preview_get_size (preview, &width, &height);

  dest = g_new (guchar, width * height * 4);
  src = g_new (guchar, width * height * bpp);

  gimp_pixel_rgn_init (&src_rgn, drawable,
                       x, y, width, height,
                       FALSE, FALSE);
  gimp_pixel_rgn_get_rect (&src_rgn, src, x, y, width, height);

  for (i = 0; i < width * height; i++)
    to_alpha_func (src + i * bpp, dest + i * 4, bpp, NULL);

  g_free (src);

  /* Our code assumes that the drawable has an alpha channel (and adds
   * one later if the effect is actually performed). For that reason
   * we have to take care when drawing the preview.
   */
  if (bpp == 4)
    {
      gimp_preview_draw_buffer (preview, dest, width * 4);
    }
  else
    {
      /* This is not correct because we ignore the selection, but it
       * is the best we can easily do.
       */
      gimp_preview_area_draw (GIMP_PREVIEW_AREA (preview->area),
                              0, 0, width, height,
                              GIMP_RGBA_IMAGE, dest, width * 4);
    }

  g_free (dest);
}
示例#6
0
/*
 *    Handle the expose event on the preview
 */
static gboolean
nova_center_preview_expose (GtkWidget  *widget,
                            GdkEvent   *event,
                            NovaCenter *center)
{
  if (show_cursor)
    {
      cairo_t *cr;
      gint     x, y, offx, offy;
      gint     width, height;

      GimpPreviewArea *area = GIMP_PREVIEW_AREA (center->preview->area);
      GtkAllocation    allocation;

      cr = gdk_cairo_create (gtk_widget_get_window (center->preview->area));

      gimp_preview_transform (center->preview,
                              pvals.xcenter, pvals.ycenter,
                              &x, &y);
      gtk_widget_get_allocation (GTK_WIDGET (area), &allocation);

      offx = (allocation.width  - area->width)  / 2;
      offy = (allocation.height - area->height) / 2;

      gimp_preview_get_size (center->preview, &width, &height);

      cairo_move_to (cr, offx + x + 0.5, 0);
      cairo_line_to (cr, offx + x + 0.5, allocation.height);

      cairo_move_to (cr, 0,    offy + y + 0.5);
      cairo_line_to (cr, allocation.width, offy + y + 0.5);

      cairo_set_line_width (cr, 3.0);
      cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.6);
      cairo_stroke_preserve (cr);

      cairo_set_line_width (cr, 1.0);
      cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.8);
      cairo_stroke (cr);

      cairo_destroy (cr);
    }

  return FALSE;
}
示例#7
0
文件: spread.c 项目: Minoos/gimp
static void
spread_preview_update (GimpPreview *preview,
                       GtkWidget   *size)
{
  GimpDrawable   *drawable;
  SpreadParam_t   param;
  gint            x, y, bpp;
  guchar         *buffer, *dest;
  gint            x_off, y_off;
  gint            width, height;

  drawable =
    gimp_drawable_preview_get_drawable (GIMP_DRAWABLE_PREVIEW (preview));

  param.pft      = gimp_pixel_fetcher_new (drawable, FALSE);
  param.gr       = g_rand_new ();
  param.x_amount = (gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (size),
                                                0) + 1) / 2;
  param.y_amount = (gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (size),
                                                1) + 1) / 2;
  param.width    = drawable->width;
  param.height   = drawable->height;

  gimp_preview_get_size (preview, &width, &height);

  bpp = drawable->bpp;
  dest = buffer = g_new (guchar, width * height * bpp);

  gimp_preview_get_position (preview, &x_off, &y_off);

  for (y = 0 ; y < height ; y++)
    for (x = 0 ; x < width ; x++)
      {
        spread_func (x + x_off, y + y_off, dest, bpp, &param);
        dest += bpp;
      }

  gimp_preview_draw_buffer (preview, buffer, width * bpp);

  g_free (buffer);
  g_rand_free (param.gr);
}
示例#8
0
文件: nova.c 项目: Amerekanets/gimp
static void
nova_center_cursor_draw (NovaCenter *center)
{
  GtkWidget *prvw = center->preview->area;
  gint       width, height;

  gimp_preview_get_size (center->preview, &width, &height);

  gdk_gc_set_function (prvw->style->black_gc, GDK_INVERT);

  if (show_cursor)
    {
      if (center->cursor_drawn)
        {
          gdk_draw_line (prvw->window,
                         prvw->style->black_gc,
                         center->oldx, 1, center->oldx,
                         height - 1);
          gdk_draw_line (prvw->window,
                         prvw->style->black_gc,
                         1, center->oldy,
                         width - 1, center->oldy);
        }

      gdk_draw_line (prvw->window,
                     prvw->style->black_gc,
                     center->curx, 1, center->curx,
                     height - 1);
      gdk_draw_line (prvw->window,
                     prvw->style->black_gc,
                     1, center->cury,
                     width - 1, center->cury);
    }

  /* current position of cursor is updated */
  center->oldx         = center->curx;
  center->oldy         = center->cury;
  center->cursor_drawn = TRUE;

  gdk_gc_set_function (prvw->style->black_gc, GDK_COPY);
}
示例#9
0
static void preview_update (GimpPreview *preview)
{
	GimpDrawable *drawable;
	gint          x, y;
	gint          width, height;
	GimpPixelRgn  srcPR;
	GimpPixelRgn  destPR;

	drawable = gimp_drawable_preview_get_drawable (GIMP_DRAWABLE_PREVIEW (preview));

	gimp_pixel_rgn_init ( &srcPR, drawable, 0, 0, drawable->width, drawable->height, FALSE, FALSE);
	gimp_pixel_rgn_init (&destPR, drawable, 0, 0, drawable->width, drawable->height, TRUE, TRUE);

	gimp_preview_get_position (preview, &x, &y);
	gimp_preview_get_size (preview, &width, &height);

	octave_region (&srcPR, &destPR, drawable->bpp, x, y, width, height);

	gimp_pixel_rgn_init (&destPR, drawable, x, y, width, height, FALSE, TRUE);
	gimp_drawable_preview_draw_region (GIMP_DRAWABLE_PREVIEW (preview), &destPR);
}
示例#10
0
static void
preview_update (GimpPreview *preview)
{
  GimpDrawable *drawable;
  gint          x1, x2;
  gint          y1, y2;
  gint          x, y;
  gint          width, height;
  gint          border;
  GimpPixelRgn  srcPR;
  GimpPixelRgn  destPR;

  drawable =
    gimp_drawable_preview_get_drawable (GIMP_DRAWABLE_PREVIEW (preview));

  gimp_pixel_rgn_init (&srcPR, drawable,
                       0, 0, drawable->width, drawable->height, FALSE, FALSE);
  gimp_pixel_rgn_init (&destPR, drawable,
                       0, 0, drawable->width, drawable->height, TRUE, TRUE);

  gimp_preview_get_position (preview, &x, &y);
  gimp_preview_get_size (preview, &width, &height);

  /* enlarge the region to avoid artefacts at the edges of the preview */
  border = 2.0 * c2g_params.radius + 0.5;
  
  if (border > width/2) border = width/2; //Speed up preview 
  x1 = MAX (0, x - border);
  y1 = MAX (0, y - border);
  x2 = MIN (x + width  + border, drawable->width);
  y2 = MIN (y + height + border, drawable->height);

  c2g_region (&srcPR, &destPR, drawable->bpp,
                  c2g_params.radius, c2g_params.amount, c2g_params.gamma,
                  x1, x2, y1, y2,
                  FALSE);

  gimp_pixel_rgn_init (&destPR, drawable, x, y, width, height, FALSE, TRUE);
  gimp_drawable_preview_draw_region (GIMP_DRAWABLE_PREVIEW (preview), &destPR);
}
示例#11
0
static void
sobel (GimpDrawable *drawable,
       gboolean      do_horizontal,
       gboolean      do_vertical,
       gboolean      keep_sign,
       GimpPreview  *preview)
{
  GimpPixelRgn  srcPR, destPR;
  gint          width, height;
  gint          bytes;
  gint          gradient, hor_gradient, ver_gradient;
  guchar       *dest, *d;
  guchar       *prev_row, *pr;
  guchar       *cur_row, *cr;
  guchar       *next_row, *nr;
  guchar       *tmp;
  gint          row, col;
  gint          x1, y1, x2, y2;
  gboolean      alpha;
  gint          counter;
  guchar       *preview_buffer = NULL;

  if (preview)
    {
      gimp_preview_get_position (preview, &x1, &y1);
      gimp_preview_get_size (preview, &width, &height);
      x2 = x1 + width;
      y2 = y1 + height;
    }
  else
    {
      gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
      gimp_progress_init (_("Sobel edge detecting"));
      width  = x2 - x1;
      height = y2 - y1;
    }

  /* Get the size of the input image. (This will/must be the same
   *  as the size of the output image.
   */
  bytes  = drawable->bpp;
  alpha  = gimp_drawable_has_alpha (drawable->drawable_id);

  /*  allocate row buffers  */
  prev_row = g_new (guchar, (width + 2) * bytes);
  cur_row  = g_new (guchar, (width + 2) * bytes);
  next_row = g_new (guchar, (width + 2) * bytes);
  dest     = g_new (guchar, width * bytes);

  /*  initialize the pixel regions  */
  gimp_pixel_rgn_init (&srcPR, drawable, 0, 0,
                       drawable->width, drawable->height,
                       FALSE, FALSE);

  if (preview)
    {
      preview_buffer = g_new (guchar, width * height * bytes);
    }
  else
    {
      gimp_pixel_rgn_init (&destPR, drawable, 0, 0,
                           drawable->width, drawable->height,
                           TRUE, TRUE);
    }

  pr = prev_row + bytes;
  cr = cur_row  + bytes;
  nr = next_row + bytes;

  sobel_prepare_row (&srcPR, pr, x1, y1 - 1, width);
  sobel_prepare_row (&srcPR, cr, x1, y1, width);
  counter =0;
  /*  loop through the rows, applying the sobel convolution  */
  for (row = y1; row < y2; row++)
    {
      /*  prepare the next row  */
      sobel_prepare_row (&srcPR, nr, x1, row + 1, width);

      d = dest;
      for (col = 0; col < width * bytes; col++)
        {
          hor_gradient = (do_horizontal ?
                          ((pr[col - bytes] +  2 * pr[col] + pr[col + bytes]) -
                           (nr[col - bytes] + 2 * nr[col] + nr[col + bytes]))
                          : 0);
          ver_gradient = (do_vertical ?
                          ((pr[col - bytes] + 2 * cr[col - bytes] + nr[col - bytes]) -
                           (pr[col + bytes] + 2 * cr[col + bytes] + nr[col + bytes]))
                          : 0);
          gradient = (do_vertical && do_horizontal) ?
            (ROUND (RMS (hor_gradient, ver_gradient)) / 5.66) /* always >0 */
            : (keep_sign ? (127 + (ROUND ((hor_gradient + ver_gradient) / 8.0)))
               : (ROUND (abs (hor_gradient + ver_gradient) / 4.0)));

          if (alpha && (((col + 1) % bytes) == 0))
            { /* the alpha channel */
              *d++ = (counter == 0) ? 0 : 255;
              counter = 0;
            }
          else
            {
              *d++ = gradient;
              if (gradient > 10) counter ++;
            }
        }
      /*  shuffle the row pointers  */
      tmp = pr;
      pr = cr;
      cr = nr;
      nr = tmp;

      /*  store the dest  */
      if (preview)
        {
          memcpy (preview_buffer + width * (row - y1) * bytes,
                  dest,
                  width * bytes);
        }
      else
        {
          gimp_pixel_rgn_set_row (&destPR, dest, x1, row, width);

          if ((row % 20) == 0)
            gimp_progress_update ((double) row / (double) (y2 - y1));
        }
    }

  if (preview)
    {
      gimp_preview_draw_buffer (preview, preview_buffer, width * bytes);
      g_free (preview_buffer);
    }
  else
    {
      gimp_progress_update (1.0);
      /*  update the sobeled region  */
      gimp_drawable_flush (drawable);
      gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
      gimp_drawable_update (drawable->drawable_id, x1, y1, width, height);
    }

  g_free (prev_row);
  g_free (cur_row);
  g_free (next_row);
  g_free (dest);
}
示例#12
0
/*
 * Photocopy algorithm
 * -----------------
 * Mask radius = radius of pixel neighborhood for intensity comparison
 * Threshold   = relative intensity difference which will result in darkening
 * Ramp        = amount of relative intensity difference before total black
 * Blur radius = mask radius / 3.0
 *
 * Algorithm:
 * For each pixel, calculate pixel intensity value to be: avg (blur radius)
 * relative diff = pixel intensity / avg (mask radius)
 * If relative diff < Threshold
 *   intensity mult = (Ramp - MIN (Ramp, (Threshold - relative diff))) / Ramp
 *   pixel intensity *= intensity mult
 * Else
 *   pixel intensity = white
 */
static void
photocopy (GimpDrawable *drawable,
           GimpPreview  *preview)
{
  GimpPixelRgn  src_rgn, dest_rgn;
  GimpPixelRgn *pr;
  gint          width, height;
  gint          bytes;
  gboolean      has_alpha;
  guchar       *dest1;
  guchar       *dest2;
  guchar       *src1, *sp_p1, *sp_m1;
  guchar       *src2, *sp_p2, *sp_m2;
  gdouble       n_p1[5], n_m1[5];
  gdouble       n_p2[5], n_m2[5];
  gdouble       d_p1[5], d_m1[5];
  gdouble       d_p2[5], d_m2[5];
  gdouble       bd_p1[5], bd_m1[5];
  gdouble       bd_p2[5], bd_m2[5];
  gdouble      *val_p1, *val_m1, *vp1, *vm1;
  gdouble      *val_p2, *val_m2, *vp2, *vm2;
  gint          x1, y1;
  gint          i, j;
  gint          row, col;
  gint          terms;
  gint          progress, max_progress;
  gint          initial_p1[4];
  gint          initial_p2[4];
  gint          initial_m1[4];
  gint          initial_m2[4];
  gdouble       radius;
  gdouble       val;
  gdouble       std_dev1;
  gdouble       std_dev2;
  gdouble       ramp_down;
  gdouble       ramp_up;

  if (preview)
    {
      gimp_preview_get_position (preview, &x1, &y1);
      gimp_preview_get_size (preview, &width, &height);
    }
  else
    {
      gint x2, y2;

      gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);

      width  = x2 - x1;
      height = y2 - y1;
    }

  bytes     = drawable->bpp;
  has_alpha = gimp_drawable_has_alpha (drawable->drawable_id);

  val_p1 = g_new (gdouble, MAX (width, height));
  val_p2 = g_new (gdouble, MAX (width, height));
  val_m1 = g_new (gdouble, MAX (width, height));
  val_m2 = g_new (gdouble, MAX (width, height));

  dest1 = g_new0 (guchar, width * height);
  dest2 = g_new0 (guchar, width * height);

  progress = 0;
  max_progress = width * height * 3;

  gimp_pixel_rgn_init (&src_rgn, drawable,
                       x1, y1, width, height, FALSE, FALSE);

  for (pr = gimp_pixel_rgns_register (1, &src_rgn);
       pr != NULL;
       pr = gimp_pixel_rgns_process (pr))
    {
      guchar *src_ptr  = src_rgn.data;
      guchar *dest_ptr = dest1 + (src_rgn.y - y1) * width + (src_rgn.x - x1);

      for (row = 0; row < src_rgn.h; row++)
        {
          for (col = 0; col < src_rgn.w; col++)
            {
              /* desaturate */
              if (bytes > 2)
                dest_ptr[col] = (guchar) gimp_rgb_to_l_int (src_ptr[col * bytes + 0],
                                                            src_ptr[col * bytes + 1],
                                                            src_ptr[col * bytes + 2]);
              else
                dest_ptr[col] = (guchar) src_ptr[col * bytes];

              /* compute  transfer */
              val = pow (dest_ptr[col], (1.0 / GAMMA));
              dest_ptr[col] = (guchar) CLAMP (val, 0, 255);
            }

          src_ptr  += src_rgn.rowstride;
          dest_ptr += width;
        }

      if (!preview)
        {
          progress += src_rgn.w * src_rgn.h;
          gimp_progress_update ((gdouble) progress / (gdouble) max_progress);
        }
    }

  /*  Calculate the standard deviations  */
  radius   = MAX (1.0, 10 * (1.0 - pvals.sharpness));
  radius   = fabs (radius) + 1.0;
  std_dev1 = sqrt (-(radius * radius) / (2 * log (1.0 / 255.0)));

  radius   = fabs (pvals.mask_radius) + 1.0;
  std_dev2 = sqrt (-(radius * radius) / (2 * log (1.0 / 255.0)));

  /*  derive the constants for calculating the gaussian from the std dev  */
  find_constants (n_p1, n_m1, d_p1, d_m1, bd_p1, bd_m1, std_dev1);
  find_constants (n_p2, n_m2, d_p2, d_m2, bd_p2, bd_m2, std_dev2);

  /*  First the vertical pass  */
  for (col = 0; col < width; col++)
    {
      memset (val_p1, 0, height * sizeof (gdouble));
      memset (val_p2, 0, height * sizeof (gdouble));
      memset (val_m1, 0, height * sizeof (gdouble));
      memset (val_m2, 0, height * sizeof (gdouble));

      src1  = dest1 + col;
      sp_p1 = src1;
      sp_m1 = src1 + (height - 1) * width;
      vp1   = val_p1;
      vp2   = val_p2;
      vm1   = val_m1 + (height - 1);
      vm2   = val_m2 + (height - 1);

      /*  Set up the first vals  */
      initial_p1[0] = sp_p1[0];
      initial_m1[0] = sp_m1[0];

      for (row = 0; row < height; row++)
        {
          gdouble *vpptr1, *vmptr1;
          gdouble *vpptr2, *vmptr2;

          terms = (row < 4) ? row : 4;

          vpptr1 = vp1; vmptr1 = vm1;
          vpptr2 = vp2; vmptr2 = vm2;

          for (i = 0; i <= terms; i++)
            {
              *vpptr1 += n_p1[i] * sp_p1[-i * width] - d_p1[i] * vp1[-i];
              *vmptr1 += n_m1[i] * sp_m1[i * width] - d_m1[i] * vm1[i];

              *vpptr2 += n_p2[i] * sp_p1[-i * width] - d_p2[i] * vp2[-i];
              *vmptr2 += n_m2[i] * sp_m1[i * width] - d_m2[i] * vm2[i];
            }

          for (j = i; j <= 4; j++)
            {
              *vpptr1 += (n_p1[j] - bd_p1[j]) * initial_p1[0];
              *vmptr1 += (n_m1[j] - bd_m1[j]) * initial_m1[0];

              *vpptr2 += (n_p2[j] - bd_p2[j]) * initial_p1[0];
              *vmptr2 += (n_m2[j] - bd_m2[j]) * initial_m1[0];
            }

          sp_p1 += width;
          sp_m1 -= width;
          vp1   += 1;
          vp2   += 1;
          vm1   -= 1;
          vm2   -= 1;
        }

      transfer_pixels (val_p1, val_m1, dest1 + col, width, height);
      transfer_pixels (val_p2, val_m2, dest2 + col, width, height);

      if (!preview)
        {
          progress += height;
          if ((col % 5) == 0)
            gimp_progress_update ((gdouble) progress / (gdouble) max_progress);
        }
    }

  for (row = 0; row < height; row++)
    {
      memset (val_p1, 0, width * sizeof (gdouble));
      memset (val_p2, 0, width * sizeof (gdouble));
      memset (val_m1, 0, width * sizeof (gdouble));
      memset (val_m2, 0, width * sizeof (gdouble));

      src1 = dest1 + row * width;
      src2 = dest2 + row * width;

      sp_p1 = src1;
      sp_p2 = src2;
      sp_m1 = src1 + width - 1;
      sp_m2 = src2 + width - 1;
      vp1   = val_p1;
      vp2   = val_p2;
      vm1   = val_m1 + width - 1;
      vm2   = val_m2 + width - 1;

      /*  Set up the first vals  */
      initial_p1[0] = sp_p1[0];
      initial_p2[0] = sp_p2[0];
      initial_m1[0] = sp_m1[0];
      initial_m2[0] = sp_m2[0];

      for (col = 0; col < width; col++)
        {
          gdouble *vpptr1, *vmptr1;
          gdouble *vpptr2, *vmptr2;

          terms = (col < 4) ? col : 4;

          vpptr1 = vp1; vmptr1 = vm1;
          vpptr2 = vp2; vmptr2 = vm2;

          for (i = 0; i <= terms; i++)
            {
              *vpptr1 += n_p1[i] * sp_p1[-i] - d_p1[i] * vp1[-i];
              *vmptr1 += n_m1[i] * sp_m1[i] - d_m1[i] * vm1[i];

              *vpptr2 += n_p2[i] * sp_p2[-i] - d_p2[i] * vp2[-i];
              *vmptr2 += n_m2[i] * sp_m2[i] - d_m2[i] * vm2[i];
            }

          for (j = i; j <= 4; j++)
            {
              *vpptr1 += (n_p1[j] - bd_p1[j]) * initial_p1[0];
              *vmptr1 += (n_m1[j] - bd_m1[j]) * initial_m1[0];

              *vpptr2 += (n_p2[j] - bd_p2[j]) * initial_p2[0];
              *vmptr2 += (n_m2[j] - bd_m2[j]) * initial_m2[0];
            }

          sp_p1 ++;
          sp_p2 ++;
          sp_m1 --;
          sp_m2 --;
          vp1 ++;
          vp2 ++;
          vm1 --;
          vm2 --;
        }

      transfer_pixels (val_p1, val_m1, dest1 + row * width, 1, width);
      transfer_pixels (val_p2, val_m2, dest2 + row * width, 1, width);

      if (!preview)
        {
          progress += width;
          if ((row % 5) == 0)
            gimp_progress_update ((gdouble) progress / (gdouble) max_progress);
        }
    }

  /* Compute the ramp value which sets 'pct_black' % of the darkened pixels black */
  ramp_down = compute_ramp (dest1, dest2, width * height, pvals.pct_black, 1);
  ramp_up   = compute_ramp (dest1, dest2, width * height, 1.0 - pvals.pct_white, 0);

  /* Initialize the pixel regions. */
  gimp_pixel_rgn_init (&src_rgn, drawable, x1, y1, width, height, FALSE, FALSE);
  gimp_pixel_rgn_init (&dest_rgn, drawable, x1, y1, width, height,
                       (preview == NULL), TRUE);

  pr = gimp_pixel_rgns_register (2, &src_rgn, &dest_rgn);

  while (pr)
    {
      guchar  *src_ptr  = src_rgn.data;
      guchar  *dest_ptr = dest_rgn.data;
      guchar  *blur_ptr = dest1 + (src_rgn.y - y1) * width + (src_rgn.x - x1);
      guchar  *avg_ptr  = dest2 + (src_rgn.y - y1) * width + (src_rgn.x - x1);
      gdouble  diff, mult;
      gdouble  lightness = 0.0;

      for (row = 0; row < src_rgn.h; row++)
        {
          for (col = 0; col < src_rgn.w; col++)
            {
              if (avg_ptr[col] > EPSILON)
                {
                  diff = (gdouble) blur_ptr[col] / (gdouble) avg_ptr[col];

                  if (diff < pvals.threshold)
                    {
                      if (ramp_down == 0.0)
                        mult = 0.0;
                      else
                        mult = (ramp_down - MIN (ramp_down,
                                                 (pvals.threshold - diff))) / ramp_down;
                      lightness = CLAMP (blur_ptr[col] * mult, 0, 255);
                    }
                  else
                    {
                      if (ramp_up == 0.0)
                        mult = 1.0;
                      else
                        mult = MIN (ramp_up,
                                    (diff - pvals.threshold)) / ramp_up;

                      lightness = 255 - (1.0 - mult) * (255 - blur_ptr[col]);
                      lightness = CLAMP (lightness, 0, 255);
                    }
                }
              else
                {
                  lightness = 0;
                }

              if (bytes < 3)
                {
                  dest_ptr[col * bytes] = (guchar) lightness;
                  if (has_alpha)
                    dest_ptr[col * bytes + 1] = src_ptr[col * src_rgn.bpp + 1];
                }
              else
                {
                  dest_ptr[col * bytes + 0] = lightness;
                  dest_ptr[col * bytes + 1] = lightness;
                  dest_ptr[col * bytes + 2] = lightness;

                  if (has_alpha)
                    dest_ptr[col * bytes + 3] = src_ptr[col * src_rgn.bpp + 3];
                }
            }

          src_ptr  += src_rgn.rowstride;
          dest_ptr += dest_rgn.rowstride;
          blur_ptr += width;
          avg_ptr  += width;
        }

      if (preview)
        {
          gimp_drawable_preview_draw_region (GIMP_DRAWABLE_PREVIEW (preview),
                                             &dest_rgn);
        }
      else
        {
          progress += src_rgn.w * src_rgn.h;
          gimp_progress_update ((gdouble) progress / (gdouble) max_progress);
        }

      pr = gimp_pixel_rgns_process (pr);
    }

  if (! preview)
    {
      /*  merge the shadow, update the drawable  */
      gimp_drawable_flush (drawable);
      gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
      gimp_drawable_update (drawable->drawable_id, x1, y1, width, height);
    }

  /*  free up buffers  */
  g_free (val_p1);
  g_free (val_p2);
  g_free (val_m1);
  g_free (val_m2);
  g_free (dest1);
  g_free (dest2);
}
示例#13
0
/* do the exchanging */
static void
exchange (GimpDrawable *drawable,
          GimpPreview  *preview)
{
  GimpPixelRgn  srcPR, destPR;
  guchar        min_red,  min_green,  min_blue;
  guchar        max_red,  max_green,  max_blue;
  guchar        from_red, from_green, from_blue;
  guchar        to_red,   to_green,   to_blue;
  guchar       *src_row, *dest_row;
  gint          x, y, bpp = drawable->bpp;
  gboolean      has_alpha;
  gint          x1, y1, y2;
  gint          width, height;
  GimpRGB       min;
  GimpRGB       max;

  if (preview)
    {
      gimp_preview_get_position (preview, &x1, &y1);
      gimp_preview_get_size (preview, &width, &height);
    }
  else if (! gimp_drawable_mask_intersect (drawable->drawable_id,
                                           &x1, &y1, &width, &height))
    {
      return;
    }

  y2 = y1 + height;

  has_alpha = gimp_drawable_has_alpha (drawable->drawable_id);
  /* allocate memory */
  src_row = g_new (guchar, drawable->width * bpp);

  gimp_rgb_get_uchar (&xargs.from, &from_red, &from_green, &from_blue);
  gimp_rgb_get_uchar (&xargs.to,   &to_red,   &to_green,   &to_blue);

  /* get boundary values */
  min = xargs.from;
  gimp_rgb_subtract (&min, &xargs.threshold);
  gimp_rgb_clamp (&min);
  gimp_rgb_get_uchar (&min, &min_red, &min_green, &min_blue);

  max = xargs.from;
  gimp_rgb_add (&max, &xargs.threshold);
  gimp_rgb_clamp (&max);
  gimp_rgb_get_uchar (&max, &max_red, &max_green, &max_blue);

  dest_row = g_new (guchar, drawable->width * bpp);

  gimp_pixel_rgn_init (&srcPR, drawable,
                       x1, y1, width, height, FALSE, FALSE);
  gimp_pixel_rgn_init (&destPR, drawable,
                       x1, y1, width, height, (preview == NULL), TRUE);

  for (y = y1; y < y2; y++)
    {
      gimp_pixel_rgn_get_row (&srcPR, src_row, x1, y, width);

      for (x = 0; x < width; x++)
        {
          guchar pixel_red, pixel_green, pixel_blue;
          guchar new_red, new_green, new_blue;
          guint  idx;

          /* get current pixel-values */
          pixel_red   = src_row[x * bpp];
          pixel_green = src_row[x * bpp + 1];
          pixel_blue  = src_row[x * bpp + 2];

          idx = x * bpp;

          /* want this pixel? */
          if (pixel_red >= min_red &&
              pixel_red <= max_red &&
              pixel_green >= min_green &&
              pixel_green <= max_green &&
              pixel_blue >= min_blue &&
              pixel_blue <= max_blue)
            {
              guchar red_delta, green_delta, blue_delta;

              red_delta   = pixel_red > from_red ?
                pixel_red - from_red : from_red - pixel_red;
              green_delta = pixel_green > from_green ?
                pixel_green - from_green : from_green - pixel_green;
              blue_delta  = pixel_blue > from_blue ?
                pixel_blue - from_blue : from_blue - pixel_blue;

              new_red   = CLAMP (to_red   + red_delta,   0, 255);
              new_green = CLAMP (to_green + green_delta, 0, 255);
              new_blue  = CLAMP (to_blue  + blue_delta,  0, 255);
            }
          else
            {
              new_red   = pixel_red;
              new_green = pixel_green;
              new_blue  = pixel_blue;
            }

          /* fill buffer */
          dest_row[idx + 0] = new_red;
          dest_row[idx + 1] = new_green;
          dest_row[idx + 2] = new_blue;

          /* copy alpha-channel */
          if (has_alpha)
            dest_row[idx + 3] = src_row[x * bpp + 3];
        }
      /* store the dest */
      gimp_pixel_rgn_set_row (&destPR, dest_row, x1, y, width);

      /* and tell the user what we're doing */
      if (!preview && (y % 10) == 0)
        gimp_progress_update ((gdouble) y / (gdouble) height);
    }

  g_free (src_row);
  g_free (dest_row);

  if (preview)
    {
      gimp_drawable_preview_draw_region (GIMP_DRAWABLE_PREVIEW (preview),
                                         &destPR);
    }
  else
    {
      gimp_progress_update (1.0);
      /* update the processed region */
      gimp_drawable_flush (drawable);
      gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
      gimp_drawable_update (drawable->drawable_id, x1, y1, width, height);
    }
}
示例#14
0
static gboolean
focusblur_fft_buffer_update_source (FblurFftBuffer *fft,
                                    GimpDrawable   *drawable,
                                    GimpPreview    *preview)
{
  GimpPixelRgn  pr;
  gsize         size;
  gint          x1, x2, y1, y2;
  gint          width, height;
  gint          ntiles;

  fft->source.drawable = drawable;
  fft->source.preview  = preview;

  gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);

  if (preview)
    {
      gint px1, px2, py1, py2;
      gint pw, ph;

      gimp_preview_get_position (GIMP_PREVIEW (preview), &px1, &py1); 
      gimp_preview_get_size (GIMP_PREVIEW (preview), &pw, &ph); 
      px2 = px1 + pw;
      py2 = py1 + ph;

      x1 = MAX (px1, x1);
      x2 = MIN (px2, x2);
      y1 = MAX (py1, y1);
      y2 = MIN (py2, y2);
    }

  g_assert (x1 < x2);
  g_assert (y1 < y2);

  width  = x2 - x1;
  height = y2 - y1;

  ntiles = 1 + x2 / TILE_WIDTH - x1 / TILE_WIDTH;
  gimp_tile_cache_ntiles (ntiles);

  fft->source.has_alpha = gimp_drawable_has_alpha (drawable->drawable_id);
  fft->source.bpp       = drawable->bpp;
  fft->source.channels  = drawable->bpp - (fft->source.has_alpha ? 1 : 0);
  fft->source.rowstride = drawable->bpp * width;

  size = fft->source.rowstride * height;

  if (fft->source.data_preview)
    {
      if (! preview)
        {
          g_free (fft->source.data_preview);
          fft->source.data_preview = NULL;
        }
      else if (size != fft->source.size)
        {
          g_free (fft->source.data_preview);
          goto allocate2;
        }
    }
  else
    {
    allocate2:
      if (preview)
        {
          fft->source.data_preview = g_malloc (size);
          if (! fft->source.data_preview)
            return FALSE;
        }
    }

  if (fft->source.data)
    {
      if (size != fft->source.size)
        {
          g_free (fft->source.data);
          goto allocate;
        }
    }
  else
    {
    allocate:
      fft->source.size = size;
      fft->source.data = g_malloc (size);
      if (! fft->source.data)
        return FALSE;
      goto reload;
    }

  if (x1 == fft->source.x1 &&
      x2 == fft->source.x2 &&
      y1 == fft->source.y1 &&
      y2 == fft->source.y2)
    return TRUE;

 reload:
  fft->source.x1     = x1;
  fft->source.x2     = x2;
  fft->source.y1     = y1;
  fft->source.y2     = y2;
  fft->source.width  = width;
  fft->source.height = height;

  /* need to recount */
  fft->depth.count = 0;

  /* load */
  gimp_pixel_rgn_init (&pr, drawable, x1, y1, width, height, FALSE, FALSE);
  gimp_pixel_rgn_get_rect (&pr, fft->source.data,
                           fft->source.x1, fft->source.y1,
                           fft->source.width, fft->source.height);

  return TRUE;
}
示例#15
0
文件: oilify.c 项目: Amerekanets/gimp
/*
 * For all x and y as requested, replace the pixel at (x,y)
 * with a weighted average of the most frequently occurring
 * values in a circle of mask_size diameter centered at (x,y).
 */
static void
oilify (GimpDrawable *drawable,
        GimpPreview  *preview)
{
  gboolean      use_inten;
  gboolean      use_msmap = FALSE;
  gboolean      use_emap = FALSE;
  GimpDrawable *mask_size_map_drawable = NULL;
  GimpDrawable *exponent_map_drawable = NULL;
  GimpPixelRgn  mask_size_map_rgn;
  GimpPixelRgn  exponent_map_rgn;
  gint          msmap_bpp = 0;
  gint          emap_bpp = 0;
  GimpPixelRgn  dest_rgn;
  GimpPixelRgn *regions[3];
  gint          n_regions;
  gint          bpp;
  gint         *sqr_lut;
  gint          x1, y1, x2, y2;
  gint          width, height;
  gint          Hist[HISTSIZE];
  gint          Hist_rgb[4][HISTSIZE];
  gpointer      pr;
  gint          progress, max_progress;
  guchar       *src_buf;
  guchar       *src_inten_buf = NULL;
  gint          i;

  use_inten = (ovals.mode == MODE_INTEN);

  /*  Get the selection bounds  */
  if (preview)
    {
      gimp_preview_get_position (preview, &x1, &y1);
      gimp_preview_get_size (preview, &width, &height);

      x2 = x1 + width;
      y2 = y1 + height;
    }
  else
    {
      gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
      width  = x2 - x1;
      height = y2 - y1;
    }

  progress = 0;
  max_progress = width * height;

  bpp = drawable->bpp;

  /*
   * Look-up-table implementation of the square function, for use in the
   * VERY TIGHT inner loops
   */
  {
    gint lut_size = (gint) ovals.mask_size / 2 + 1;

    sqr_lut = g_new (gint, lut_size);

    for (i = 0; i < lut_size; i++)
      sqr_lut[i] = SQR (i);
  }

  /*  Get the map drawables, if applicable  */

  if (ovals.use_mask_size_map && ovals.mask_size_map >= 0)
    {
      use_msmap = TRUE;

      mask_size_map_drawable = gimp_drawable_get (ovals.mask_size_map);
      gimp_pixel_rgn_init (&mask_size_map_rgn, mask_size_map_drawable,
                           x1, y1, width, height, FALSE, FALSE);

      msmap_bpp = mask_size_map_drawable->bpp;
    }

  if (ovals.use_exponent_map && ovals.exponent_map >= 0)
    {
      use_emap = TRUE;

      exponent_map_drawable = gimp_drawable_get (ovals.exponent_map);
      gimp_pixel_rgn_init (&exponent_map_rgn, exponent_map_drawable,
                           x1, y1, width, height, FALSE, FALSE);

      emap_bpp = exponent_map_drawable->bpp;
    }

  gimp_pixel_rgn_init (&dest_rgn, drawable,
                       x1, y1, width, height, (preview == NULL), TRUE);

  {
    GimpPixelRgn src_rgn;

    gimp_pixel_rgn_init (&src_rgn, drawable,
                         x1, y1, width, height, FALSE, FALSE);
    src_buf = g_new (guchar, width * height * bpp);
    gimp_pixel_rgn_get_rect (&src_rgn, src_buf, x1, y1, width, height);
  }

  /*
   * If we're working in intensity mode, then generate a separate intensity
   * map of the source image. This way, we can avoid calculating the
   * intensity of any given source pixel more than once.
   */
  if (use_inten)
    {
      guchar *src;
      guchar *dest;

      src_inten_buf = g_new (guchar, width * height);

      for (i = 0,
           src = src_buf,
           dest = src_inten_buf
           ;
           i < (width * height)
           ;
           i++,
           src += bpp,
           dest++)
        {
          *dest = (guchar) GIMP_RGB_LUMINANCE (src[0], src[1], src[2]);
        }
    }

  n_regions = 0;
  regions[n_regions++] = &dest_rgn;
  if (use_msmap)
    regions[n_regions++] = &mask_size_map_rgn;
  if (use_emap)
    regions[n_regions++] = &exponent_map_rgn;

  for (pr = gimp_pixel_rgns_register2 (n_regions, regions);
       pr != NULL;
       pr = gimp_pixel_rgns_process (pr))
    {
      gint    y;
      guchar *dest_row;
      guchar *src_msmap_row = NULL;
      guchar *src_emap_row = NULL;

      for (y = dest_rgn.y,
           dest_row = dest_rgn.data,
           src_msmap_row = mask_size_map_rgn.data,  /* valid iff use_msmap */
           src_emap_row = exponent_map_rgn.data     /* valid iff use_emap */
           ;
           y < (gint) (dest_rgn.y + dest_rgn.h)
           ;
           y++,
           dest_row += dest_rgn.rowstride,
           src_msmap_row += mask_size_map_rgn.rowstride,  /* valid iff use_msmap */
           src_emap_row += exponent_map_rgn.rowstride)    /* valid iff use_emap */
        {
          gint    x;
          guchar *dest;
          guchar *src_msmap = NULL;
          guchar *src_emap = NULL;

          for (x = dest_rgn.x,
               dest = dest_row,
               src_msmap = src_msmap_row,  /* valid iff use_msmap */
               src_emap = src_emap_row     /* valid iff use_emap */
               ;
               x < (gint) (dest_rgn.x + dest_rgn.w)
               ;
               x++,
               dest += bpp,
               src_msmap += msmap_bpp,  /* valid iff use_msmap */
               src_emap += emap_bpp)    /* valid iff use_emap */
            {
              gint    radius, radius_squared;
              gfloat  exponent;
              gint    mask_x1, mask_y1;
              gint    mask_x2, mask_y2;
              gint    mask_y;
              gint    src_offset;
              guchar *src_row;
              guchar *src_inten_row = NULL;

              if (use_msmap)
                {
                  gfloat factor = get_map_value (src_msmap, msmap_bpp);

                  radius = ROUND (factor * (0.5 * ovals.mask_size));
                }
              else
                {
                  radius = (gint) ovals.mask_size / 2;
                }

              radius_squared = SQR (radius);

              exponent = ovals.exponent;
              if (use_emap)
                exponent *= get_map_value (src_emap, emap_bpp);

              if (use_inten)
                memset (Hist, 0, sizeof (Hist));

              memset (Hist_rgb, 0, sizeof (Hist_rgb));

              mask_x1 = CLAMP ((x - radius), x1, x2);
              mask_y1 = CLAMP ((y - radius), y1, y2);
              mask_x2 = CLAMP ((x + radius + 1), x1, x2);
              mask_y2 = CLAMP ((y + radius + 1), y1, y2);

              src_offset = (mask_y1 - y1) * width + (mask_x1 - x1);

              for (mask_y = mask_y1,
                   src_row = src_buf + src_offset * bpp,
                   src_inten_row = src_inten_buf + src_offset  /* valid iff use_inten */
                   ;
                   mask_y < mask_y2
                   ;
                   mask_y++,
                   src_row += width * bpp,
                   src_inten_row += width)  /* valid iff use_inten */
                {
                  guchar *src;
                  guchar *src_inten = NULL;
                  gint    dy_squared = sqr_lut[ABS (mask_y - y)];
                  gint    mask_x;

                  for (mask_x = mask_x1,
                       src = src_row,
                       src_inten = src_inten_row  /* valid iff use_inten */
                       ;
                       mask_x < mask_x2
                       ;
                       mask_x++,
                       src += bpp,
                       src_inten++)  /* valid iff use_inten */
                    {
                      gint dx_squared = sqr_lut[ABS (mask_x - x)];
                      gint b;

                      /*  Stay inside a circular mask area  */
                      if ((dx_squared + dy_squared) > radius_squared)
                        continue;

                      if (use_inten)
                        {
                          gint inten = *src_inten;
                          ++Hist[inten];
                          for (b = 0; b < bpp; b++)
                            Hist_rgb[b][inten] += src[b];
                        }
                      else
                        {
                          for (b = 0; b < bpp; b++)
                            ++Hist_rgb[b][src[b]];
                        }

                    } /* for mask_x */
                } /* for mask_y */

              if (use_inten)
                {
                  weighted_average_color (Hist, Hist_rgb, exponent, dest, bpp);
                }
              else
                {
                  gint b;

                  for (b = 0; b < bpp; b++)
                    dest[b] = weighted_average_value (Hist_rgb[b], exponent);
                }

            } /* for x */
        } /* for y */

      if (preview)
        {
          gimp_drawable_preview_draw_region (GIMP_DRAWABLE_PREVIEW (preview),
                                             &dest_rgn);
        }
      else
        {
          progress += dest_rgn.w * dest_rgn.h;
          gimp_progress_update ((gdouble) progress / (gdouble) max_progress);
        }
    } /* for pr */

  /*  Detach from the map drawables  */
  if (mask_size_map_drawable)
    gimp_drawable_detach (mask_size_map_drawable);

  if (exponent_map_drawable)
    gimp_drawable_detach (exponent_map_drawable);

  if (src_inten_buf)
    g_free (src_inten_buf);

  g_free (src_buf);
  g_free (sqr_lut);

  if (!preview)
    {
      /*  Update the oil-painted region  */
      gimp_drawable_flush (drawable);
      gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
      gimp_drawable_update (drawable->drawable_id, x1, y1, width, height);
    }
}
示例#16
0
static void
softglow (GimpDrawable *drawable,
          GimpPreview  *preview)
{
  GimpPixelRgn  src_rgn, dest_rgn;
  GimpPixelRgn *pr;
  gint          width, height;
  gint          bytes;
  gboolean      has_alpha;
  guchar       *dest;
  guchar       *src, *sp_p, *sp_m;
  gdouble       n_p[5], n_m[5];
  gdouble       d_p[5], d_m[5];
  gdouble       bd_p[5], bd_m[5];
  gdouble      *val_p, *val_m, *vp, *vm;
  gint          x1, y1, x2, y2;
  gint          i, j;
  gint          row, col, b;
  gint          terms;
  gint          progress, max_progress;
  gint          initial_p[4];
  gint          initial_m[4];
  gint          tmp;
  gdouble       radius;
  gdouble       std_dev;
  gdouble       val;

  if (preview)
    {
      gimp_preview_get_position (preview, &x1, &y1);
      gimp_preview_get_size (preview, &width, &height);
      x2 = x1 + width;
      y2 = y1 + height;
    }
  else
    {
      gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
      width     = (x2 - x1);
      height    = (y2 - y1);
    }

  bytes     = drawable->bpp;
  has_alpha = gimp_drawable_has_alpha (drawable->drawable_id);

  val_p = g_new (gdouble, MAX (width, height));
  val_m = g_new (gdouble, MAX (width, height));

  dest = g_new0 (guchar, width * height);

  progress = 0;
  max_progress = width * height * 3;

  /* Initialize the pixel regions. */
  gimp_pixel_rgn_init (&src_rgn, drawable, x1, y1, width, height, FALSE, FALSE);

  for (pr = gimp_pixel_rgns_register (1, &src_rgn);
       pr != NULL;
       pr = gimp_pixel_rgns_process (pr))
    {
      guchar *src_ptr  = src_rgn.data;
      guchar *dest_ptr = dest + (src_rgn.y - y1) * width + (src_rgn.x - x1);

      for (row = 0; row < src_rgn.h; row++)
        {
          for (col = 0; col < src_rgn.w; col++)
            {
              /* desaturate */
              if (bytes > 2)
                dest_ptr[col] = (guchar) gimp_rgb_to_l_int (src_ptr[col * bytes + 0],
                                                            src_ptr[col * bytes + 1],
                                                            src_ptr[col * bytes + 2]);
              else
                dest_ptr[col] = (guchar) src_ptr[col * bytes];

              /* compute sigmoidal transfer */
              val = dest_ptr[col] / 255.0;
              val = 255.0 / (1 + exp (-(SIGMOIDAL_BASE + (svals.sharpness * SIGMOIDAL_RANGE)) * (val - 0.5)));
              val = val * svals.brightness;
              dest_ptr[col] = (guchar) CLAMP (val, 0, 255);
            }

          src_ptr  += src_rgn.rowstride;
          dest_ptr += width;
        }

      if (!preview)
        {
          progress += src_rgn.w * src_rgn.h;
          gimp_progress_update ((gdouble) progress / (gdouble) max_progress);
        }
    }

  /*  Calculate the standard deviations  */
  radius  = fabs (svals.glow_radius) + 1.0;
  std_dev = sqrt (-(radius * radius) / (2 * log (1.0 / 255.0)));

  /*  derive the constants for calculating the gaussian from the std dev  */
  find_constants (n_p, n_m, d_p, d_m, bd_p, bd_m, std_dev);

  /*  First the vertical pass  */
  for (col = 0; col < width; col++)
    {
      memset (val_p, 0, height * sizeof (gdouble));
      memset (val_m, 0, height * sizeof (gdouble));

      src  = dest + col;
      sp_p = src;
      sp_m = src + width * (height - 1);
      vp   = val_p;
      vm   = val_m + (height - 1);

      /*  Set up the first vals  */
      initial_p[0] = sp_p[0];
      initial_m[0] = sp_m[0];

      for (row = 0; row < height; row++)
        {
          gdouble *vpptr, *vmptr;

          terms = (row < 4) ? row : 4;

          vpptr = vp; vmptr = vm;
          for (i = 0; i <= terms; i++)
            {
              *vpptr += n_p[i] * sp_p[-i * width] - d_p[i] * vp[-i];
              *vmptr += n_m[i] * sp_m[i * width] - d_m[i] * vm[i];
            }
          for (j = i; j <= 4; j++)
            {
              *vpptr += (n_p[j] - bd_p[j]) * initial_p[0];
              *vmptr += (n_m[j] - bd_m[j]) * initial_m[0];
            }

          sp_p += width;
          sp_m -= width;
          vp ++;
          vm --;
        }

      transfer_pixels (val_p, val_m, dest + col, width, height);

      if (!preview)
        {
          progress += height;
          if ((col % 5) == 0)
            gimp_progress_update ((gdouble) progress / (gdouble) max_progress);
        }
    }

  for (row = 0; row < height; row++)
    {
      memset (val_p, 0, width * sizeof (gdouble));
      memset (val_m, 0, width * sizeof (gdouble));

      src = dest + row * width;

      sp_p = src;
      sp_m = src + width - 1;
      vp = val_p;
      vm = val_m + width - 1;

      /*  Set up the first vals  */
      initial_p[0] = sp_p[0];
      initial_m[0] = sp_m[0];

      for (col = 0; col < width; col++)
        {
          gdouble *vpptr, *vmptr;

          terms = (col < 4) ? col : 4;

          vpptr = vp; vmptr = vm;

          for (i = 0; i <= terms; i++)
            {
              *vpptr += n_p[i] * sp_p[-i] - d_p[i] * vp[-i];
              *vmptr += n_m[i] * sp_m[i] - d_m[i] * vm[i];
            }

          for (j = i; j <= 4; j++)
            {
              *vpptr += (n_p[j] - bd_p[j]) * initial_p[0];
              *vmptr += (n_m[j] - bd_m[j]) * initial_m[0];
            }

          sp_p ++;
          sp_m --;
          vp ++;
          vm --;
        }

      transfer_pixels (val_p, val_m, dest + row * width, 1, width);

      if (!preview)
        {
          progress += width;
          if ((row % 5) == 0)
            gimp_progress_update ((gdouble) progress / (gdouble) max_progress);
        }
    }

  /* Initialize the pixel regions. */
  gimp_pixel_rgn_init (&src_rgn, drawable, x1, y1, width, height, FALSE, FALSE);
  gimp_pixel_rgn_init (&dest_rgn, drawable,
                       x1, y1, width, height, (preview == NULL), TRUE);

  for (pr = gimp_pixel_rgns_register (2, &src_rgn, &dest_rgn);
       pr != NULL;
       pr = gimp_pixel_rgns_process (pr))
    {
      guchar *src_ptr  = src_rgn.data;
      guchar *dest_ptr = dest_rgn.data;
      guchar *blur_ptr = dest + (src_rgn.y - y1) * width + (src_rgn.x - x1);

      for (row = 0; row < src_rgn.h; row++)
        {
          for (col = 0; col < src_rgn.w; col++)
            {
              /* screen op */
              for (b = 0; b < (has_alpha ? (bytes - 1) : bytes); b++)
                dest_ptr[col * bytes + b] =
                  255 - INT_MULT((255 - src_ptr[col * bytes + b]),
                                 (255 - blur_ptr[col]), tmp);
              if (has_alpha)
                dest_ptr[col * bytes + b] = src_ptr[col * bytes + b];
            }

          src_ptr  += src_rgn.rowstride;
          dest_ptr += dest_rgn.rowstride;
          blur_ptr += width;
        }

      if (preview)
        {
          gimp_drawable_preview_draw_region (GIMP_DRAWABLE_PREVIEW (preview),
                                             &dest_rgn);
        }
      else
        {
          progress += src_rgn.w * src_rgn.h;
          gimp_progress_update ((gdouble) progress / (gdouble) max_progress);
        }
    }

  if (! preview)
    {
      /*  merge the shadow, update the drawable  */
      gimp_drawable_flush (drawable);
      gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
      gimp_drawable_update (drawable->drawable_id,
                            x1, y1, (x2 - x1), (y2 - y1));
    }

  /*  free up buffers  */
  g_free (val_p);
  g_free (val_m);
  g_free (dest);
}
示例#17
0
gboolean
focusblur_fft_buffer_update (FblurFftBuffer **fft,
                             FblurParam      *param,
                             FblurQualityType quality,
                             GimpPreview     *preview)
{
  gint                   width, height;
  gint                   radius, range;
  gint                   x1, x2, y1, y2;


  /* check condition */
  if (quality == FBLUR_QUALITY_BEST)
    return FALSE;

  if (! focusblur_diffusion_update (&(param->diffusion), *fft,
                                    &(param->store), param->brush_name))
    {
      gimp_message (_("Failed to update diffusion table."));

      focusblur_fft_buffer_destroy (fft);
      return FALSE;
    }

  radius = ceilf (param->diffusion->model_radius); // without softness
  range = param->diffusion->model_radius_int;

  if (radius < 3 ||
      (quality == FBLUR_QUALITY_NORMAL &&
       param->store.enable_depth_map &&
       radius > 63)) // needs more tune
    return FALSE;

  gimp_drawable_mask_bounds (param->drawable_ID, &x1, &y1, &x2, &y2);

  if (preview)
    {
      gint px1, px2, py1, py2;
      gint pw, ph;

      gimp_preview_get_position (GIMP_PREVIEW (preview), &px1, &py1); 
      gimp_preview_get_size (GIMP_PREVIEW (preview), &pw, &ph); 
      px2 = px1 + pw;
      py2 = py1 + ph;

      /* it is not need for GimpDrawablePreview */
      if (x1 >= px2 || x2 <= px1 ||
          y1 >= py2 || y2 <= py1)
        return TRUE;

      x1 = MAX (px1, x1);
      x2 = MIN (px2, x2);
      y1 = MAX (py1, y1);
      y2 = MIN (py2, y2);
    }

  width  = x2 - x1;
  height = y2 - y1;

  if (width  < range ||
      height < range)
    return FALSE;

  if (! *fft)
    {
      *fft = g_new0 (FblurFftBuffer, 1);

      if (! *fft)
        {
          gimp_message (_("Failed to allocate memory."));

          return FALSE;
        }
    }

  //focusblur_source_destroy (&(param->source));

  /* fftsource must be updated before to update work and depth */
  if (! focusblur_fft_buffer_update_source (*fft, param->drawable, preview))
    {
      gimp_message (_("Failed to update source buffer."));

      focusblur_fft_buffer_destroy (fft);
      return FALSE;
    }

  if (param->store.enable_depth_map)
    {
      if (! focusblur_depth_map_update (&(param->depth_map), *fft,
                                        &(param->store), quality))
        {
          gimp_message (_("Failed to update depth info."));

          focusblur_fft_buffer_destroy (fft);
          return FALSE;
        }
      else
        {
          gint d = focusblur_depth_map_focal_depth (param->depth_map);
          focusblur_fft_buffer_update_depth_division (*fft, quality, range, d);

          focusblur_fft_buffer_update_depth_count (*fft, param->depth_map);
        }
    }

  if (! focusblur_fft_buffer_update_work (*fft, range))
    {
      gimp_message (_("Failed to update working buffer."));

      focusblur_fft_buffer_destroy (fft);
      return FALSE;
    }

  if (! focusblur_shine_update (&(param->shine), param->drawable,
                                &(param->store)))
    {
      gimp_message (_("Failed to update shine data."));

      focusblur_fft_buffer_destroy (fft);
      return FALSE;
    }

  return TRUE;
}
示例#18
0
static void
grid (gint32        image_ID,
      GimpDrawable *drawable,
      GimpPreview  *preview)
{
  GimpPixelRgn  srcPR, destPR;
  gint          bytes;
  gint          x_offset, y_offset;
  guchar       *dest, *buffer = NULL;
  gint          x, y;
  gboolean      alpha;
  gboolean      blend;
  guchar        hcolor[4];
  guchar        vcolor[4];
  guchar        icolor[4];
  guchar       *cmap;
  gint          ncolors;

  gimp_rgba_get_uchar (&grid_cfg.hcolor,
                       hcolor, hcolor + 1, hcolor + 2, hcolor + 3);
  gimp_rgba_get_uchar (&grid_cfg.vcolor,
                       vcolor, vcolor + 1, vcolor + 2, vcolor + 3);
  gimp_rgba_get_uchar (&grid_cfg.icolor,
                       icolor, icolor + 1, icolor + 2, icolor + 3);

  switch (gimp_image_base_type (image_ID))
    {
    case GIMP_RGB:
      blend = TRUE;
      break;

    case GIMP_GRAY:
      hcolor[0] = gimp_rgb_luminance_uchar (&grid_cfg.hcolor);
      vcolor[0] = gimp_rgb_luminance_uchar (&grid_cfg.vcolor);
      icolor[0] = gimp_rgb_luminance_uchar (&grid_cfg.icolor);
      blend = TRUE;
      break;

    case GIMP_INDEXED:
      cmap = gimp_image_get_colormap (image_ID, &ncolors);

      hcolor[0] = best_cmap_match (cmap, ncolors, &grid_cfg.hcolor);
      vcolor[0] = best_cmap_match (cmap, ncolors, &grid_cfg.vcolor);
      icolor[0] = best_cmap_match (cmap, ncolors, &grid_cfg.icolor);

      g_free (cmap);
      blend = FALSE;
      break;

    default:
      g_assert_not_reached ();
      blend = FALSE;
    }

  bytes = drawable->bpp;
  alpha = gimp_drawable_has_alpha (drawable->drawable_id);

  if (preview)
    {
      gimp_preview_get_position (preview, &sx1, &sy1);
      gimp_preview_get_size (preview, &sx2, &sy2);

      buffer = g_new (guchar, bytes * sx2 * sy2);

      sx2 += sx1;
      sy2 += sy1;
    }
  else
    {
      gimp_drawable_mask_bounds (drawable->drawable_id, &sx1, &sy1, &sx2, &sy2);

      gimp_pixel_rgn_init (&destPR,
                           drawable, 0, 0, sx2 - sx1, sy2 - sy1, TRUE, TRUE);
    }

  gimp_pixel_rgn_init (&srcPR,
                       drawable, 0, 0, sx2 - sx1, sy2 - sy1, FALSE, FALSE);

  dest = g_new (guchar, (sx2 - sx1) * bytes);

  for (y = sy1; y < sy2; y++)
    {
      gimp_pixel_rgn_get_row (&srcPR, dest, sx1, y, (sx2 - sx1));

      y_offset = y - grid_cfg.hoffset;
      while (y_offset < 0)
        y_offset += grid_cfg.hspace;

      if ((y_offset +
           (grid_cfg.hwidth / 2)) % grid_cfg.hspace < grid_cfg.hwidth)
        {
          for (x = sx1; x < sx2; x++)
            {
              pix_composite (&dest[(x-sx1) * bytes],
                             hcolor, bytes, blend, alpha);
            }
        }

      for (x = sx1; x < sx2; x++)
        {
          x_offset = grid_cfg.vspace + x - grid_cfg.voffset;
          while (x_offset < 0)
            x_offset += grid_cfg.vspace;

          if ((x_offset +
               (grid_cfg.vwidth / 2)) % grid_cfg.vspace < grid_cfg.vwidth)
            {
              pix_composite (&dest[(x-sx1) * bytes],
                             vcolor, bytes, blend, alpha);
            }

          if ((x_offset +
               (grid_cfg.iwidth / 2)) % grid_cfg.vspace < grid_cfg.iwidth
              &&
              ((y_offset % grid_cfg.hspace >= grid_cfg.ispace
                &&
                y_offset % grid_cfg.hspace < grid_cfg.ioffset)
               ||
               (grid_cfg.hspace -
                (y_offset % grid_cfg.hspace) >= grid_cfg.ispace
                &&
                grid_cfg.hspace -
                (y_offset % grid_cfg.hspace) < grid_cfg.ioffset)))
            {
              pix_composite (&dest[(x-sx1) * bytes],
                             icolor, bytes, blend, alpha);
            }
        }

      if ((y_offset +
           (grid_cfg.iwidth / 2)) % grid_cfg.hspace < grid_cfg.iwidth)
        {
          for (x = sx1; x < sx2; x++)
            {
              x_offset = grid_cfg.vspace + x - grid_cfg.voffset;
              while (x_offset < 0)
                x_offset += grid_cfg.vspace;

              if ((x_offset % grid_cfg.vspace >= grid_cfg.ispace
                   &&
                   x_offset % grid_cfg.vspace < grid_cfg.ioffset)
                  ||
                  (grid_cfg.vspace -
                   (x_offset % grid_cfg.vspace) >= grid_cfg.ispace
                   &&
                   grid_cfg.vspace -
                   (x_offset % grid_cfg.vspace) < grid_cfg.ioffset))
                {
                  pix_composite (&dest[(x-sx1) * bytes],
                                 icolor, bytes, blend, alpha);
                }
            }
        }

      if (preview)
        {
          memcpy (buffer + (y - sy1) * (sx2 - sx1) * bytes,
                  dest,
                  (sx2 - sx1) * bytes);
        }
      else
        {
          gimp_pixel_rgn_set_row (&destPR, dest, sx1, y, (sx2 - sx1));

          if (y % 16 == 0)
            gimp_progress_update ((gdouble) y / (gdouble) (sy2 - sy1));
        }
    }

  g_free (dest);

  if (preview)
    {
      gimp_preview_draw_buffer (preview, buffer, bytes * (sx2 - sx1));
      g_free (buffer);
    }
  else
    {
      gimp_progress_update (1.0);
      gimp_drawable_flush (drawable);
      gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
      gimp_drawable_update (drawable->drawable_id,
                            sx1, sy1, sx2 - sx1, sy2 - sy1);
    }
}
示例#19
0
static void
drawlens (GimpDrawable *drawable,
          GimpPreview  *preview)
{
  GimpImageType  drawtype = gimp_drawable_type (drawable->drawable_id);
  GimpPixelRgn   srcPR, destPR;
  gint           width, height;
  gint           bytes;
  gint           row;
  gint           x1, y1, x2, y2;
  guchar        *src, *dest;
  gint           i, col;
  gfloat         regionwidth, regionheight, dx, dy, xsqr, ysqr;
  gfloat         a, b, c, asqr, bsqr, csqr, x, y;
  glong          pixelpos, pos;
  GimpRGB        background;
  guchar         bgr_red, bgr_blue, bgr_green;
  guchar         alphaval;

  gimp_context_get_background (&background);
  gimp_rgb_get_uchar (&background,
                      &bgr_red, &bgr_green, &bgr_blue);

  bytes = drawable->bpp;

  if (preview)
    {
      gimp_preview_get_position (preview, &x1, &y1);
      gimp_preview_get_size (preview, &width, &height);
      x2 = x1 + width;
      y2 = y1 + height;
      src = gimp_drawable_get_thumbnail_data (drawable->drawable_id,
                                              &width, &height, &bytes);
      regionwidth  = width;
      regionheight = height;
    }
  else
    {
      gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
      regionwidth = x2 - x1;
      regionheight = y2 - y1;
      width = drawable->width;
      height = drawable->height;
      gimp_pixel_rgn_init (&srcPR, drawable,
                           0, 0, width, height, FALSE, FALSE);
      gimp_pixel_rgn_init (&destPR, drawable,
                           0, 0, width, height, TRUE, TRUE);

      src  = g_new (guchar, regionwidth * regionheight * bytes);
      gimp_pixel_rgn_get_rect (&srcPR, src,
                               x1, y1, regionwidth, regionheight);
    }

  dest = g_new (guchar, regionwidth * regionheight * bytes);

  a = regionwidth / 2;
  b = regionheight / 2;

  c = MIN (a, b);

  asqr = a * a;
  bsqr = b * b;
  csqr = c * c;

  for (col = 0; col < regionwidth; col++)
    {
      dx = (gfloat) col - a + 0.5;
      xsqr = dx * dx;
      for (row = 0; row < regionheight; row++)
        {
          pixelpos = (col + row * regionwidth) * bytes;
          dy = -((gfloat) row - b) - 0.5;
          ysqr = dy * dy;
          if (ysqr < (bsqr - (bsqr * xsqr) / asqr))
            {
              find_projected_pos (asqr, bsqr, csqr, dx, dy, &x, &y);
              y = -y;
              pos = ((gint) (y + b) * regionwidth + (gint) (x + a)) * bytes;

              for (i = 0; i < bytes; i++)
                {
                  dest[pixelpos + i] = src[pos + i];
                }
            }
          else
            {
              if (lvals.keep_surr)
                {
                  for (i = 0; i < bytes; i++)
                    {
                      dest[pixelpos + i] = src[pixelpos + i];
                    }
                }
              else
                {
                  if (lvals.set_transparent)
                    alphaval = 0;
                  else
                    alphaval = 255;

                  switch (drawtype)
                    {
                    case GIMP_INDEXEDA_IMAGE:
                      dest[pixelpos + 1] = alphaval;
                    case GIMP_INDEXED_IMAGE:
                      dest[pixelpos + 0] = 0;
                      break;

                    case GIMP_RGBA_IMAGE:
                      dest[pixelpos + 3] = alphaval;
                    case GIMP_RGB_IMAGE:
                      dest[pixelpos + 0] = bgr_red;
                      dest[pixelpos + 1] = bgr_green;
                      dest[pixelpos + 2] = bgr_blue;
                      break;

                    case GIMP_GRAYA_IMAGE:
                      dest[pixelpos + 1] = alphaval;
                    case GIMP_GRAY_IMAGE:
                      dest[pixelpos+0] = bgr_red;
                      break;
                    }
                }
            }
        }

      if (!preview)
        {
          if (((gint) (regionwidth-col) % 5) == 0)
            gimp_progress_update ((gdouble) col / (gdouble) regionwidth);
        }
    }

  if (preview)
    {
      gimp_preview_draw_buffer (preview, dest, bytes * regionwidth);
    }
  else
    {
      gimp_progress_update (1.0);
      gimp_pixel_rgn_set_rect (&destPR, dest, x1, y1,
                               regionwidth, regionheight);

      gimp_drawable_flush (drawable);
      gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
      gimp_drawable_update (drawable->drawable_id, x1, y1, x2 - x1, y2 - y1);
    }

  g_free (src);
  g_free (dest);
}
示例#20
0
文件: edge.c 项目: WilfR/Gimp-Matting
static void
edge_preview_update (GimpPreview *preview)
{
  /* drawable */
  GimpDrawable *drawable;
  glong         bytes;
  gint          alpha;
  gboolean      has_alpha;

  /* preview */
  guchar       *src           = NULL; /* Buffer to hold source image */
  guchar       *render_buffer = NULL; /* Buffer to hold rendered image */
  guchar       *dest;
  gint          width;                /* Width of preview widget */
  gint          height;               /* Height of preview widget */
  gint          x1;                   /* Upper-left X of preview */
  gint          y1;                   /* Upper-left Y of preview */
  GimpPixelRgn  srcPR;                /* Pixel regions */

  /* algorithm */
  gint x, y;

  /* Get drawable info */
  drawable =
    gimp_drawable_preview_get_drawable (GIMP_DRAWABLE_PREVIEW (preview));
  bytes  = gimp_drawable_bpp (drawable->drawable_id);
  alpha  = bytes;
  has_alpha = gimp_drawable_has_alpha (drawable->drawable_id);
  if (has_alpha)
    alpha--;

  /*
   * Setup for filter...
   */
  gimp_preview_get_position (preview, &x1, &y1);
  gimp_preview_get_size (preview, &width, &height);

  /* initialize pixel regions */
  gimp_pixel_rgn_init (&srcPR, drawable,
                       x1, y1, width, height, FALSE, FALSE);
  src = g_new (guchar, width * height * bytes);
  render_buffer = g_new (guchar, width * height * bytes);

  /* render image */
  gimp_pixel_rgn_get_rect(&srcPR, src, x1, y1, width, height);
  dest = render_buffer;

  /* render algorithm */
  for (y = 0 ; y < height ; y++)
    for (x = 0 ; x < width ; x++)
      {
        gint chan;
        for (chan = 0; chan < alpha; chan++)
          {
            guchar kernel[9];

#define SRC(X,Y) src[bytes * (CLAMP((X), 0, width-1) + \
                              width * CLAMP((Y), 0, height-1)) + chan]

            kernel[0] = SRC (x - 1, y - 1);
            kernel[1] = SRC (x - 1, y    );
            kernel[2] = SRC (x - 1, y + 1);
            kernel[3] = SRC (x    , y - 1);
            kernel[4] = SRC (x    , y    );
            kernel[5] = SRC (x    , y + 1);
            kernel[6] = SRC (x + 1, y - 1);
            kernel[7] = SRC (x + 1, y    );
            kernel[8] = SRC (x + 1, y + 1);

#undef SRC
            dest[chan] = edge_detect (kernel);
          }
        if (has_alpha)
          dest[alpha] = src[bytes * (x + width * y) + alpha];
        dest += bytes;
      }
  /*
   * Draw the preview image on the screen...
   */
  gimp_preview_draw_buffer (preview, render_buffer, width * bytes);

  g_free (render_buffer);
  g_free (src);
}
示例#21
0
static void
shift (GimpDrawable *drawable,
       GimpPreview  *preview)
{
  GimpPixelRgn      dest_rgn;
  gpointer          pr;
  GimpPixelFetcher *pft;
  gint              width, height;
  gint              bytes;
  guchar           *destline;
  guchar           *dest;
  gint              x1, y1, x2, y2;
  gint              x, y;
  gint              progress, max_progress;
  gint              i, n = 0;
  gint             *offsets;
  GRand            *gr;

  if (preview)
    {
      gimp_preview_get_position (preview, &x1, &y1);
      gimp_preview_get_size (preview, &width, &height);
    }
  else
    {
      gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
      width  = x2 - x1;
      height = y2 - y1;
    }

  bytes  = drawable->bpp;

  progress     = 0;
  max_progress = width * height;

  /* Shift the image.  It's a pretty simple algorithm.  If horizontal
     is selected, then every row is shifted a random number of pixels
     in the range of -shift_amount/2 to shift_amount/2.  The effect is
     just reproduced with columns if vertical is selected.
   */

  n = (shvals.orientation == HORIZONTAL) ? height : width;

  offsets = g_new (gint, n);
  gr = g_rand_new ();

  for (i = 0; i < n; i++)
    offsets[i] = g_rand_int_range (gr,
                                   - (shvals.shift_amount + 1) / 2.0,
                                   + (shvals.shift_amount + 1) / 2.0);

  g_rand_free (gr);

  pft = gimp_pixel_fetcher_new (drawable, FALSE);
  gimp_pixel_fetcher_set_edge_mode (pft, GIMP_PIXEL_FETCHER_EDGE_WRAP);

  gimp_pixel_rgn_init (&dest_rgn, drawable,
                       x1, y1, width, height, (preview == NULL), TRUE);

  for (pr = gimp_pixel_rgns_register (1, &dest_rgn);
       pr != NULL;
       pr = gimp_pixel_rgns_process (pr))
    {
      destline = dest_rgn.data;

      switch (shvals.orientation)
        {
        case HORIZONTAL:
          for (y = dest_rgn.y; y < dest_rgn.y + dest_rgn.h; y++)
            {
              dest = destline;

              for (x = dest_rgn.x; x < dest_rgn.x + dest_rgn.w; x++)
                {
                  gimp_pixel_fetcher_get_pixel (pft,
                                                x + offsets[y - y1], y, dest);
                  dest += bytes;
                }

              destline += dest_rgn.rowstride;
            }
          break;

        case VERTICAL:
          for (x = dest_rgn.x; x < dest_rgn.x + dest_rgn.w; x++)
            {
              dest = destline;

              for (y = dest_rgn.y; y < dest_rgn.y + dest_rgn.h; y++)
                {
                  gimp_pixel_fetcher_get_pixel (pft,
                                                x, y + offsets[x - x1], dest);
                  dest += dest_rgn.rowstride;
                }

              destline += bytes;
            }
          break;
        }

      if (preview)
        {
          gimp_drawable_preview_draw_region (GIMP_DRAWABLE_PREVIEW (preview),
                                             &dest_rgn);
        }
      else
        {
          progress += dest_rgn.w * dest_rgn.h;
          gimp_progress_update ((double) progress / (double) max_progress);
        }
    }

  gimp_pixel_fetcher_destroy (pft);
  g_free (offsets);

  if (! preview)
    {
      gimp_progress_update (1.0);
      /*  update the region  */
      gimp_drawable_flush (drawable);
      gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
      gimp_drawable_update (drawable->drawable_id, x1, y1, width, height);
    }
}
示例#22
0
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);

  drawable =
    gimp_drawable_preview_get_drawable (GIMP_DRAWABLE_PREVIEW (preview));

  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);
}
示例#23
0
static void
value_propagate_body (GimpDrawable *drawable,
                      GimpPreview  *preview)
{
  GimpImageType  dtype;
  ModeParam      operation;
  GimpPixelRgn   srcRgn, destRgn;
  guchar        *here, *best, *dest;
  guchar        *dest_row, *prev_row, *cur_row, *next_row;
  guchar        *pr, *cr, *nr, *swap;
  gint           width, height, bytes, index;
  gint           begx, begy, endx, endy, x, y, dx;
  gint           left_index, right_index, up_index, down_index;
  gpointer       tmp;
  GimpRGB        foreground;

  /* calculate neighbors' indexes */
  left_index  = (vpvals.direction_mask & (1 << Left2Right)) ? -1 : 0;
  right_index = (vpvals.direction_mask & (1 << Right2Left)) ?  1 : 0;
  up_index    = (vpvals.direction_mask & (1 << Top2Bottom)) ? -1 : 0;
  down_index  = (vpvals.direction_mask & (1 << Bottom2Top)) ?  1 : 0;
  operation   = modes[vpvals.propagate_mode];
  tmp         = NULL;

  dtype = gimp_drawable_type (drawable->drawable_id);
  bytes = drawable->bpp;

  /* Here I use the algorithm of blur.c */
  if (preview)
    {
       gimp_preview_get_position (preview, &begx, &begy);
       gimp_preview_get_size (preview, &width, &height);

       endx = begx + width;
       endy = begy + height;
    }
  else
    {
      if (! gimp_drawable_mask_intersect (drawable->drawable_id,
                                          &begx, &begy, &width, &height))
        return;

      endx = begx + width;
      endy = begy + height;
    }

  gimp_tile_cache_ntiles (2 * ((width) / gimp_tile_width () + 1));

  prev_row = g_new (guchar, (width + 2) * bytes);
  cur_row  = g_new (guchar, (width + 2) * bytes);
  next_row = g_new (guchar, (width + 2) * bytes);
  dest_row = g_new (guchar, width * bytes);

  gimp_pixel_rgn_init (&srcRgn, drawable,
                       begx, begy, width, height,
                       FALSE, FALSE);
  gimp_pixel_rgn_init (&destRgn, drawable,
                       begx, begy, width, height,
                       (preview == NULL), TRUE);

  pr = prev_row + bytes;
  cr = cur_row + bytes;
  nr = next_row + bytes;

  prepare_row (&srcRgn, pr, begx, (0 < begy) ? begy : begy - 1, endx-begx);
  prepare_row (&srcRgn, cr, begx, begy, endx-begx);

  best = g_new (guchar, bytes);

  if (!preview)
    gimp_progress_init (_("Value Propagate"));

  gimp_context_get_foreground (&foreground);
  gimp_rgb_get_uchar (&foreground, fore+0, fore+1, fore+2);

  /* start real job */
  for (y = begy ; y < endy ; y++)
    {
      prepare_row (&srcRgn, nr, begx, ((y+1) < endy) ? y+1 : endy, endx-begx);

      for (index = 0; index < (endx - begx) * bytes; index++)
        dest_row[index] = cr[index];

      for (x = 0 ; x < endx - begx; x++)
        {
          dest = dest_row + (x * bytes);
          here = cr + (x * bytes);

          /* *** copy source value to best value holder *** */
          memcpy (best, here, bytes);

          if (operation.initializer)
            (* operation.initializer)(dtype, bytes, best, here, &tmp);

          /* *** gather neighbors' values: loop-unfolded version *** */
          if (up_index == -1)
            for (dx = left_index ; dx <= right_index ; dx++)
              (* operation.updater)(dtype, bytes, here, pr+((x+dx)*bytes), best, tmp);
          for (dx = left_index ; dx <= right_index ; dx++)
            if (dx != 0)
              (* operation.updater)(dtype, bytes, here, cr+((x+dx)*bytes), best, tmp);
          if (down_index == 1)
            for (dx = left_index ; dx <= right_index ; dx++)
              (* operation.updater)(dtype, bytes, here, nr+((x+dx)*bytes), best, tmp);
          /* *** store it to dest_row*** */
          (* operation.finalizer)(dtype, bytes, best, here, dest, tmp);
        }

      /* now store destline to destRgn */
      gimp_pixel_rgn_set_row (&destRgn, dest_row, begx, y, endx - begx);

      /* shift the row pointers  */
      swap = pr;
      pr = cr;
      cr = nr;
      nr = swap;


      if (((y % 16) == 0) && !preview)
        gimp_progress_update ((gdouble) y / (gdouble) (endy - begy));
    }

  if (preview)
    {
      gimp_drawable_preview_draw_region (GIMP_DRAWABLE_PREVIEW (preview),
                                         &destRgn);
    }
  else
    {
      /*  update the region  */
      gimp_progress_update (1.0);
      gimp_drawable_flush (drawable);
      gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
      gimp_drawable_update (drawable->drawable_id, begx, begy, endx-begx, endy-begy);
    }
}
示例#24
0
static void
randomize (GimpDrawable *drawable,
           GimpPreview  *preview)
{
  GimpPixelRgn srcPR, destPR, destPR2, *sp, *dp, *tp;
  gint width, height;
  gint bytes;
  guchar *dest, *d;
  guchar *prev_row, *pr;
  guchar *cur_row, *cr;
  guchar *next_row, *nr;
  guchar *tmp;
  gint row, col;
  gint x, y;
  gint cnt;
  gint i, j, k;

  if (preview)
    {
      gimp_preview_get_position (preview, &x, &y);
      gimp_preview_get_size (preview, &width, &height);
    }
  else
    {
      if (! gimp_drawable_mask_intersect (drawable->drawable_id,
                                          &x, &y, &width, &height))
        return;
    }

  bytes = drawable->bpp;

  /*
   *  allocate row buffers
   */
  prev_row = g_new (guchar, (width + 2) * bytes);
  cur_row = g_new (guchar, (width + 2) * bytes);
  next_row = g_new (guchar, (width + 2) * bytes);
  dest = g_new (guchar, width * bytes);

  /*
   *  initialize the pixel regions
   */
  gimp_pixel_rgn_init (&srcPR, drawable, x, y, width, height, FALSE, FALSE);
  gimp_pixel_rgn_init (&destPR, drawable, x, y, width, height, TRUE, TRUE);
  gimp_pixel_rgn_init (&destPR2, drawable, x, y, width, height, TRUE, TRUE);
  sp = &srcPR;
  dp = &destPR;
  tp = NULL;

  pr = prev_row + bytes;
  cr = cur_row + bytes;
  nr = next_row + bytes;

  for (cnt = 1; cnt <= pivals.rndm_rcount; cnt++)
    {
      /*
       *  prepare the first row and previous row
       */
      randomize_prepare_row (sp, pr, x, y - 1, width);
      randomize_prepare_row (sp, cr, x, y, width);
      /*
       *  loop through the rows, applying the selected convolution
       */
      for (row = y; row < y + height; row++)
        {
          /*  prepare the next row  */
          randomize_prepare_row (sp, nr, x, row + 1, width);

          d = dest;
          for (col = 0; col < width; col++)
            {
              if (g_rand_int_range (gr, 0, 100) <= (gint) pivals.rndm_pct)
                {
                  switch (rndm_type)
                    {
                      /*
                       *  HURL
                       *      Just assign a random value.
                       */
                    case RNDM_HURL:
                      for (j = 0; j < bytes; j++)
                        *d++ = g_rand_int_range (gr, 0, 256);
                      break;
                      /*
                       *  PICK
                       *      pick at random from a neighboring pixel.
                       */
                    case RNDM_PICK:
                      k = g_rand_int_range (gr, 0, 9);
                      for (j = 0; j < bytes; j++)
                        {
                          i = col * bytes + j;

                          switch (k)
                            {
                            case 0:
                              *d++ = (gint) pr[i - bytes];
                              break;
                            case 1:
                              *d++ = (gint) pr[i];
                              break;
                            case 2:
                              *d++ = (gint) pr[i + bytes];
                              break;
                            case 3:
                              *d++ = (gint) cr[i - bytes];
                              break;
                            case 4:
                              *d++ = (gint) cr[i];
                              break;
                            case 5:
                              *d++ = (gint) cr[i + bytes];
                              break;
                            case 6:
                              *d++ = (gint) nr[i - bytes];
                              break;
                            case 7:
                              *d++ = (gint) nr[i];
                              break;
                            case 8:
                              *d++ = (gint) nr[i + bytes];
                              break;
                            }
                        }
                      break;
                      /*
                       *  SLUR
                       *      80% chance it's from directly above,
                       *      10% from above left,
                       *      10% from above right.
                       */
                    case RNDM_SLUR:
                      k = g_rand_int_range (gr, 0, 10);
                      for (j = 0; j < bytes; j++)
                        {
                          i = col*bytes + j;

                          switch (k )
                            {
                            case 0:
                              *d++ = (gint) pr[i - bytes];
                              break;
                            case 9:
                              *d++ = (gint) pr[i + bytes];
                              break;
                            default:
                              *d++ = (gint) pr[i];
                              break;
                            }
                        }
                      break;
                    }
                  /*
                   *  Otherwise, this pixel was not selected for randomization,
                   *  so use the current value.
                   */
                }
              else
                {
                  for (j = 0; j < bytes; j++)
                    *d++ = (gint) cr[col*bytes + j];
                }
            }
          /*
           *  Save the modified row, shuffle the row pointers, and every
           *  so often, update the progress meter.
           */
          gimp_pixel_rgn_set_row (dp, dest, x, row, width);

          tmp = pr;
          pr = cr;
          cr = nr;
          nr = tmp;

          if (! preview && PROG_UPDATE_TIME)
            {
              gdouble base = (gdouble) cnt / pivals.rndm_rcount;
              gdouble inc  = (gdouble) row / (height * pivals.rndm_rcount);

              gimp_progress_update (base + inc);
            }
        }

      /*
       *  if we have more cycles to perform, swap the src and dest Pixel Regions
       */
      if (cnt < pivals.rndm_rcount)
        {
          if (tp != NULL)
            {
              tp = dp;
              dp = sp;
              sp = tp;
            }
          else
            {
              tp = &srcPR;
              sp = &destPR;
              dp = &destPR2;
            }
        }
    }

  if (! preview)
    gimp_progress_update (1.0);

  /*
   *  update the randomized region
   */
  if (preview)
    {
      gimp_drawable_preview_draw_region (GIMP_DRAWABLE_PREVIEW (preview),
                                         dp);
    }
  else
    {
      gimp_drawable_flush (drawable);
      gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
      gimp_drawable_update (drawable->drawable_id, x, y, width, height);
    }

  /*
   *  clean up after ourselves.
   */
  g_free (prev_row);
  g_free (cur_row);
  g_free (next_row);
  g_free (dest);
}
示例#25
0
/*  -  Filter function  -  I wish all filter functions had a pmode :) */
static void
glasstile (GimpDrawable *drawable,
           GimpPreview  *preview)
{
  GimpPixelRgn  srcPR, destPR;
  gint          width, height;
  gint          bytes;
  guchar       *dest, *d;
  guchar       *cur_row;
  gint          row, col, i;
  gint          x1, y1, x2, y2;

  /* Translations of variable names from Maswan
   * rutbredd = grid width
   * ruthojd = grid height
   * ymitt = y middle
   * xmitt = x middle
   */

  gint rutbredd, xpixel1, xpixel2;
  gint ruthojd , ypixel2;
  gint xhalv, xoffs, xmitt, xplus;
  gint yhalv, yoffs, ymitt, yplus;

  if (preview)
    {
      gimp_preview_get_position (preview, &x1, &y1);
      gimp_preview_get_size (preview, &width, &height);
      x2 = x1 + width;
      y2 = y1 + height;
    }
  else
    {
      gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
      width  = x2 - x1;
      height = y2 - y1;
    }
  bytes  = drawable->bpp;

  cur_row = g_new (guchar, width * bytes);
  dest    = g_new (guchar, width * bytes);

  /* initialize the pixel regions, set grid height/width */
  gimp_pixel_rgn_init (&srcPR, drawable,
                        x1, y1, width, height,
                        FALSE, FALSE);
  gimp_pixel_rgn_init (&destPR, drawable,
                       x1, y1, width, height,
                       preview == NULL, TRUE);

  rutbredd = gtvals.xblock;
  ruthojd  = gtvals.yblock;

  xhalv = rutbredd / 2;
  yhalv = ruthojd  / 2;

  xplus = rutbredd % 2;
  yplus = ruthojd  % 2;

  ymitt = y1;
  yoffs = 0;

  /*  Loop through the rows */
  for (row = y1; row < y2; row++)
    {
      d = dest;

      ypixel2 = ymitt + yoffs * 2;
      ypixel2 = CLAMP (ypixel2, 0, y2 - 1);

      gimp_pixel_rgn_get_row (&srcPR, cur_row, x1, ypixel2, width);
      yoffs++;

      /* if current offset = half, do a displacement next time around */
      if (yoffs == yhalv)
        {
          ymitt += ruthojd;
          yoffs = - (yhalv + yplus);
        }

      xmitt = 0;
      xoffs = 0;

      for (col = 0; col < x2 - x1; col++) /* one pixel */
        {
          xpixel1 = (xmitt + xoffs) * bytes;
          xpixel2 = (xmitt + xoffs * 2) * bytes;

          if (xpixel2 < (x2 - x1) * bytes)
            {
              if (xpixel2 < 0)
                xpixel2 = 0;
              for (i = 0; i < bytes; i++)
                d[xpixel1 + i] = cur_row[xpixel2 + i];
            }
          else
            {
              for (i = 0; i < bytes; i++)
                d[xpixel1 + i] = cur_row[xpixel1 + i];
            }

          xoffs++;

          if (xoffs == xhalv)
            {
              xmitt += rutbredd;
              xoffs = - (xhalv + xplus);
            }
        }

      /*  Store the dest  */
      gimp_pixel_rgn_set_row (&destPR, dest, x1, row, width);

      if (!preview && ((row % 5) == 0))
        {
          gimp_progress_update ((gdouble) row / (gdouble) height);
        }
    }

  /*  Update region  */
  if (preview)
    {
      gimp_drawable_preview_draw_region (GIMP_DRAWABLE_PREVIEW (preview),
                                         &destPR);
    }
  else
    {
      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, width, height);
    }

  g_free (cur_row);
  g_free (dest);
}
示例#26
0
static void
neon (GimpDrawable *drawable,
      gdouble       radius,
      gdouble       amount,
      GimpPreview  *preview)
{
    GimpPixelRgn  src_rgn, dest_rgn;
    gint          width, height;
    gint          bytes, bpp;
    gboolean      has_alpha;
    guchar       *dest;
    guchar       *src, *src2, *sp_p, *sp_m;
    gdouble       n_p[5], n_m[5];
    gdouble       d_p[5], d_m[5];
    gdouble       bd_p[5], bd_m[5];
    gdouble      *val_p, *val_m, *vp, *vm;
    gint          x1, y1, x2, y2;
    gint          i, j;
    gint          row, col, b;
    gint          terms;
    gint          progress = 0, max_progress = 1;
    gint          initial_p[4];
    gint          initial_m[4];
    gdouble       std_dev;
    guchar       *preview_buffer1 = NULL;
    guchar       *preview_buffer2 = NULL;

    if (preview)
    {
        gimp_preview_get_position (preview, &x1, &y1);
        gimp_preview_get_size (preview, &width, &height);
        x2 = x1 + width;
        y2 = y1 + height;
    }
    else
    {
        gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
        width  = (x2 - x1);
        height = (y2 - y1);
    }

    if (radius < 1.0)
        return;

    bytes     = drawable->bpp;
    bpp       = bytes;
    has_alpha = gimp_drawable_has_alpha(drawable->drawable_id);
    if (has_alpha)
        bpp--;

    val_p = g_new (gdouble, MAX (width, height) * bytes);
    val_m = g_new (gdouble, MAX (width, height) * bytes);

    src  = g_new (guchar, MAX (width, height) * bytes);
    src2 = g_new (guchar, MAX (width, height) * bytes);
    dest = g_new (guchar, MAX (width, height) * bytes);

    gimp_pixel_rgn_init (&src_rgn, drawable,
                         0, 0, drawable->width, drawable->height, FALSE, FALSE);

    if (preview)
    {
        preview_buffer1 = g_new (guchar, width * height * bytes);
        preview_buffer2 = g_new (guchar, width * height * bytes);
    }
    else
    {
        gimp_pixel_rgn_init (&dest_rgn, drawable,
                             0, 0, drawable->width, drawable->height, TRUE, TRUE);

        progress = 0;
        max_progress = (radius < 1.0 ) ? 0 : width * height * radius * 2;
    }

    /*  First the vertical pass  */
    radius  = fabs (radius) + 1.0;
    std_dev = sqrt (-(radius * radius) / (2 * log (1.0 / 255.0)));

    /*  derive the constants for calculating the gaussian from the std dev  */
    find_constants (n_p, n_m, d_p, d_m, bd_p, bd_m, std_dev);

    for (col = 0; col < width; col++)
    {
        memset (val_p, 0, height * bytes * sizeof (gdouble));
        memset (val_m, 0, height * bytes * sizeof (gdouble));

        gimp_pixel_rgn_get_col (&src_rgn, src, col + x1, y1, (y2 - y1));

        sp_p = src;
        sp_m = src + (height - 1) * bytes;
        vp = val_p;
        vm = val_m + (height - 1) * bytes;

        /*  Set up the first vals  */
        for (i = 0; i < bytes; i++)
        {
            initial_p[i] = sp_p[i];
            initial_m[i] = sp_m[i];
        }

        for (row = 0; row < height; row++)
        {
            gdouble *vpptr, *vmptr;

            terms = (row < 4) ? row : 4;

            for (b = 0; b < bpp; b++)
            {
                vpptr = vp + b;
                vmptr = vm + b;

                for (i = 0; i <= terms; i++)
                {
                    *vpptr += n_p[i] * sp_p[(-i * bytes) + b] -
                              d_p[i] * vp[(-i * bytes) + b];
                    *vmptr += n_m[i] * sp_m[(i * bytes) + b] -
                              d_m[i] * vm[(i * bytes) + b];
                }

                for (j = i; j <= 4; j++)
                {
                    *vpptr += (n_p[j] - bd_p[j]) * initial_p[b];
                    *vmptr += (n_m[j] - bd_m[j]) * initial_m[b];
                }
            }
            if (has_alpha)
            {
                vp[bpp] = sp_p[bpp];
                vm[bpp] = sp_m[bpp];
            }

            sp_p += bytes;
            sp_m -= bytes;
            vp   += bytes;
            vm   -= bytes;
        }

        transfer_pixels (val_p, val_m, dest, bytes, height);

        if (preview)
        {
            for (row = 0 ; row < height ; row++)
                memcpy (preview_buffer1 + (row * width + col) * bytes,
                        dest + bytes * row,
                        bytes);
        }
        else
        {
            gimp_pixel_rgn_set_col (&dest_rgn, dest, col + x1, y1, (y2 - y1));

            progress += height * radius;

            if ((col % 20) == 0)
                gimp_progress_update ((double) progress / (double) max_progress);
        }
    }

    /*  Now the horizontal pass  */
    gimp_pixel_rgn_init (&src_rgn, drawable,
                         0, 0, drawable->width, drawable->height, FALSE, FALSE);

    for (row = 0; row < height; row++)
    {
        memset (val_p, 0, width * bytes * sizeof (gdouble));
        memset (val_m, 0, width * bytes * sizeof (gdouble));

        gimp_pixel_rgn_get_row (&src_rgn, src, x1, row + y1, (x2 - x1));
        if (preview)
        {
            memcpy (src2,
                    preview_buffer1 + row * width * bytes,
                    width * bytes);
        }
        else
        {
            gimp_pixel_rgn_get_row (&dest_rgn, src2, x1, row + y1, (x2 - x1));
        }

        sp_p = src;
        sp_m = src + (width - 1) * bytes;
        vp = val_p;
        vm = val_m + (width - 1) * bytes;

        /*  Set up the first vals  */
        for (i = 0; i < bytes; i++)
        {
            initial_p[i] = sp_p[i];
            initial_m[i] = sp_m[i];
        }

        for (col = 0; col < width; col++)
        {
            gdouble *vpptr, *vmptr;

            terms = (col < 4) ? col : 4;

            for (b = 0; b < bpp; b++)
            {
                vpptr = vp + b;
                vmptr = vm + b;

                for (i = 0; i <= terms; i++)
                {
                    *vpptr += n_p[i] * sp_p[(-i * bytes) + b] -
                              d_p[i] * vp[(-i * bytes) + b];
                    *vmptr += n_m[i] * sp_m[(i * bytes) + b] -
                              d_m[i] * vm[(i * bytes) + b];
                }

                for (j = i; j <= 4; j++)
                {
                    *vpptr += (n_p[j] - bd_p[j]) * initial_p[b];
                    *vmptr += (n_m[j] - bd_m[j]) * initial_m[b];
                }
            }
            if (has_alpha)
            {
                vp[bpp] = sp_p[bpp];
                vm[bpp] = sp_m[bpp];
            }

            sp_p += bytes;
            sp_m -= bytes;
            vp   += bytes;
            vm   -= bytes;
        }

        transfer_pixels (val_p, val_m, dest, bytes, width);

        combine_to_gradient (dest, src2, bytes, width, amount);

        if (preview)
        {
            memcpy (preview_buffer2 + row * width * bytes,
                    dest,
                    width * bytes);
        }
        else
        {
            gimp_pixel_rgn_set_row (&dest_rgn, dest, x1, row + y1, (x2 - x1));

            progress += width * radius;
            if ((row % 20) == 0)
                gimp_progress_update ((double) progress / (double) max_progress);
        }
    }

    if (preview)
    {
        gimp_preview_draw_buffer (preview, preview_buffer2, width * bytes);
        g_free (preview_buffer1);
        g_free (preview_buffer2);
    }
    else
    {
        gimp_progress_update (1.0);
        /*  now, merge horizontal and vertical into a magnitude  */
        gimp_pixel_rgn_init (&src_rgn, drawable,
                             0, 0, drawable->width, drawable->height,
                             FALSE, TRUE);

        /*  merge the shadow, update the drawable  */
        gimp_drawable_flush (drawable);
        gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
        gimp_drawable_update (drawable->drawable_id,
                              x1, y1, (x2 - x1), (y2 - y1));
    }
    /*  free up buffers  */
    g_free (val_p);
    g_free (val_m);
    g_free (src);
    g_free (src2);
    g_free (dest);
}
示例#27
0
/*
 * Cartoon algorithm
 * -----------------
 * Mask radius = radius of pixel neighborhood for intensity comparison
 * Threshold   = relative intensity difference which will result in darkening
 * Ramp        = amount of relative intensity difference before total black
 * Blur radius = mask radius / 3.0
 *
 * Algorithm:
 * For each pixel, calculate pixel intensity value to be: avg (blur radius)
 * relative diff = pixel intensity / avg (mask radius)
 * If relative diff < Threshold
 *   intensity mult = (Ramp - MIN (Ramp, (Threshold - relative diff))) / Ramp
 *   pixel intensity *= intensity mult
 */
static void
cartoon (GimpDrawable *drawable,
         GimpPreview  *preview)
{
  GimpPixelRgn  src_rgn, dest_rgn;
  GimpPixelRgn *pr;
  gint          width, height;
  gint          bytes;
  gboolean      has_alpha;
  guchar       *dest1;
  guchar       *dest2;
  guchar       *src;
  guchar       *src1, *sp_p1, *sp_m1;
  guchar       *src2, *sp_p2, *sp_m2;
  gdouble       n_p1[5], n_m1[5];
  gdouble       n_p2[5], n_m2[5];
  gdouble       d_p1[5], d_m1[5];
  gdouble       d_p2[5], d_m2[5];
  gdouble       bd_p1[5], bd_m1[5];
  gdouble       bd_p2[5], bd_m2[5];
  gdouble      *val_p1, *val_m1, *vp1, *vm1;
  gdouble      *val_p2, *val_m2, *vp2, *vm2;
  gint          x1, y1, x2, y2;
  gint          i, j;
  gint          row, col, b;
  gint          terms;
  gint          progress, max_progress;
  gint          initial_p1[4];
  gint          initial_p2[4];
  gint          initial_m1[4];
  gint          initial_m2[4];
  gdouble       radius;
  gdouble       std_dev1;
  gdouble       std_dev2;
  gdouble       ramp;
  guchar       *preview_buffer = NULL;

  if (preview)
    {
      gimp_preview_get_position (preview, &x1, &y1);
      gimp_preview_get_size (preview, &width, &height);
    }
  else
    {
      gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);

      width     = (x2 - x1);
      height    = (y2 - y1);
    }

  bytes     = drawable->bpp;
  has_alpha = gimp_drawable_has_alpha (drawable->drawable_id);

  val_p1 = g_new (gdouble, MAX (width, height) * bytes);
  val_p2 = g_new (gdouble, MAX (width, height) * bytes);
  val_m1 = g_new (gdouble, MAX (width, height) * bytes);
  val_m2 = g_new (gdouble, MAX (width, height) * bytes);

  src   = g_new (guchar, MAX (width, height) * bytes);
  dest1 = g_new0 (guchar, width * height);
  dest2 = g_new0 (guchar, width * height);

  gimp_pixel_rgn_init (&src_rgn, drawable,
                       0, 0, drawable->width, drawable->height, FALSE, FALSE);

  progress = 0;
  max_progress = width * height * 2;

  /*  Calculate the standard deviations  */
  radius   = 1.0; /* blur radius */
  radius   = fabs (radius) + 1.0;
  std_dev1 = sqrt (-(radius * radius) / (2 * log (1.0 / 255.0)));

  radius   = cvals.mask_radius;
  radius   = fabs (radius) + 1.0;
  std_dev2 = sqrt (-(radius * radius) / (2 * log (1.0 / 255.0)));

  /*  derive the constants for calculating the gaussian from the std dev  */
  find_constants (n_p1, n_m1, d_p1, d_m1, bd_p1, bd_m1, std_dev1);
  find_constants (n_p2, n_m2, d_p2, d_m2, bd_p2, bd_m2, std_dev2);

  /*  First the vertical pass  */
  for (col = 0; col < width; col++)
    {
      memset (val_p1, 0, height * bytes * sizeof (gdouble));
      memset (val_p2, 0, height * bytes * sizeof (gdouble));
      memset (val_m1, 0, height * bytes * sizeof (gdouble));
      memset (val_m2, 0, height * bytes * sizeof (gdouble));

      gimp_pixel_rgn_get_col (&src_rgn, src, col + x1, y1, height);

      src1  = src;
      sp_p1 = src1;
      sp_m1 = src1 + (height - 1) * bytes;
      vp1   = val_p1;
      vp2   = val_p2;
      vm1   = val_m1 + (height - 1) * bytes;
      vm2   = val_m2 + (height - 1) * bytes;

      /*  Set up the first vals  */
      for (i = 0; i < bytes; i++)
        {
          initial_p1[i] = sp_p1[i];
          initial_m1[i] = sp_m1[i];
        }

      for (row = 0; row < height; row++)
        {
          gdouble *vpptr1, *vmptr1;
          gdouble *vpptr2, *vmptr2;

          terms = (row < 4) ? row : 4;

          for (b = 0; b < bytes; b++)
            {
              vpptr1 = vp1 + b; vmptr1 = vm1 + b;
              vpptr2 = vp2 + b; vmptr2 = vm2 + b;

              for (i = 0; i <= terms; i++)
                {
                  *vpptr1 += n_p1[i] * sp_p1[(-i * bytes) + b] -
                    d_p1[i] * vp1[(-i * bytes) + b];
                  *vmptr1 += n_m1[i] * sp_m1[(i * bytes) + b] -
                    d_m1[i] * vm1[(i * bytes) + b];

                  *vpptr2 += n_p2[i] * sp_p1[(-i * bytes) + b] -
                    d_p2[i] * vp2[(-i * bytes) + b];
                  *vmptr2 += n_m2[i] * sp_m1[(i * bytes) + b] -
                    d_m2[i] * vm2[(i * bytes) + b];
                }

              for (j = i; j <= 4; j++)
                {
                  *vpptr1 += (n_p1[j] - bd_p1[j]) * initial_p1[b];
                  *vmptr1 += (n_m1[j] - bd_m1[j]) * initial_m1[b];

                  *vpptr2 += (n_p2[j] - bd_p2[j]) * initial_p1[b];
                  *vmptr2 += (n_m2[j] - bd_m2[j]) * initial_m1[b];
                }
            }

          sp_p1 += bytes;
          sp_m1 -= bytes;
          vp1   += bytes;
          vp2   += bytes;
          vm1   -= bytes;
          vm2   -= bytes;
        }

      transfer_pixels (val_p1, val_m1, dest1 + col, width, bytes, height);
      transfer_pixels (val_p2, val_m2, dest2 + col, width, bytes, height);

      if (!preview)
        {
          progress += height;
          if ((col % 5) == 0)
            gimp_progress_update ((gdouble) progress / (gdouble) max_progress);
        }
    }

  for (row = 0; row < height; row++)
    {
      memset (val_p1, 0, width * sizeof (gdouble));
      memset (val_p2, 0, width * sizeof (gdouble));
      memset (val_m1, 0, width * sizeof (gdouble));
      memset (val_m2, 0, width * sizeof (gdouble));

      src1 = dest1 + row * width;
      src2 = dest2 + row * width;

      sp_p1 = src1;
      sp_p2 = src2;
      sp_m1 = src1 + width - 1;
      sp_m2 = src2 + width - 1;
      vp1   = val_p1;
      vp2   = val_p2;
      vm1   = val_m1 + width - 1;
      vm2   = val_m2 + width - 1;

      /*  Set up the first vals  */
      initial_p1[0] = sp_p1[0];
      initial_p2[0] = sp_p2[0];
      initial_m1[0] = sp_m1[0];
      initial_m2[0] = sp_m2[0];

      for (col = 0; col < width; col++)
        {
          gdouble *vpptr1, *vmptr1;
          gdouble *vpptr2, *vmptr2;

          terms = (col < 4) ? col : 4;

          vpptr1 = vp1; vmptr1 = vm1;
          vpptr2 = vp2; vmptr2 = vm2;

          for (i = 0; i <= terms; i++)
            {
              *vpptr1 += n_p1[i] * sp_p1[-i] - d_p1[i] * vp1[-i];
              *vmptr1 += n_m1[i] * sp_m1[i] - d_m1[i] * vm1[i];

              *vpptr2 += n_p2[i] * sp_p2[-i] - d_p2[i] * vp2[-i];
              *vmptr2 += n_m2[i] * sp_m2[i] - d_m2[i] * vm2[i];
            }

          for (j = i; j <= 4; j++)
            {
              *vpptr1 += (n_p1[j] - bd_p1[j]) * initial_p1[0];
              *vmptr1 += (n_m1[j] - bd_m1[j]) * initial_m1[0];

              *vpptr2 += (n_p2[j] - bd_p2[j]) * initial_p2[0];
              *vmptr2 += (n_m2[j] - bd_m2[j]) * initial_m2[0];
            }

          sp_p1 ++;
          sp_p2 ++;
          sp_m1 --;
          sp_m2 --;
          vp1 ++;
          vp2 ++;
          vm1 --;
          vm2 --;
        }

      transfer_pixels (val_p1, val_m1, dest1 + row * width, 1, 1, width);
      transfer_pixels (val_p2, val_m2, dest2 + row * width, 1, 1, width);

      if (!preview)
        {
          progress += width;
          if ((row % 5) == 0)
            gimp_progress_update ((gdouble) progress / (gdouble) max_progress);
        }
    }

  /* Compute the ramp value which sets 'pct_black' % of the darkened pixels black */
  ramp = compute_ramp (dest1, dest2, width * height, cvals.pct_black);

  /* Initialize the pixel regions. */
  gimp_pixel_rgn_init (&src_rgn, drawable, x1, y1, width, height, FALSE, FALSE);

  if (preview)
    {
      pr = gimp_pixel_rgns_register (1, &src_rgn);
      preview_buffer = g_new (guchar, width * height * bytes);
    }
  else
    {
      gimp_pixel_rgn_init (&dest_rgn, drawable,
                           x1, y1, width, height, TRUE, TRUE);
      pr = gimp_pixel_rgns_register (2, &src_rgn, &dest_rgn);
    }

  while (pr)
    {
      guchar  *src_ptr  = src_rgn.data;
      guchar  *dest_ptr;
      guchar  *blur_ptr = dest1 + (src_rgn.y - y1) * width + (src_rgn.x - x1);
      guchar  *avg_ptr  = dest2 + (src_rgn.y - y1) * width + (src_rgn.x - x1);
      gdouble  diff;
      gdouble  mult     = 0.0;
      gdouble  lightness;

      if (preview)
        dest_ptr =
          preview_buffer +
          ((src_rgn.y - y1) * width + (src_rgn.x - x1)) * bytes;
      else
        dest_ptr = dest_rgn.data;

      for (row = 0; row < src_rgn.h; row++)
        {
          for (col = 0; col < src_rgn.w; col++)
            {
              if (avg_ptr[col] != 0)
                {
                  diff = (gdouble) blur_ptr[col] / (gdouble) avg_ptr[col];
                  if (diff < cvals.threshold)
                    {
                      if (ramp == 0.0)
                        mult = 0.0;
                      else
                        mult = (ramp - MIN (ramp, (cvals.threshold - diff))) / ramp;
                    }
                  else
                    mult = 1.0;
                }

              lightness = CLAMP (blur_ptr[col] * mult, 0, 255);

              if (bytes < 3)
                {
                  dest_ptr[col * bytes] = (guchar) lightness;
                  if (has_alpha)
                    dest_ptr[col * bytes + 1] = src_ptr[col * src_rgn.bpp + 1];
                }
              else
                {
                  /*  Convert to HLS, set lightness and convert back  */
                  gint r, g, b;

                  r = src_ptr[col * src_rgn.bpp + 0];
                  g = src_ptr[col * src_rgn.bpp + 1];
                  b = src_ptr[col * src_rgn.bpp + 2];

                  gimp_rgb_to_hsl_int (&r, &g, &b);
                  b = lightness;
                  gimp_hsl_to_rgb_int (&r, &g, &b);

                  dest_ptr[col * bytes + 0] = r;
                  dest_ptr[col * bytes + 1] = g;
                  dest_ptr[col * bytes + 2] = b;

                  if (has_alpha)
                    dest_ptr[col * bytes + 3] = src_ptr[col * src_rgn.bpp + 3];
                }
            }

          src_ptr  += src_rgn.rowstride;
          if (preview)
            dest_ptr += width * bytes;
          else
            dest_ptr += dest_rgn.rowstride;
          blur_ptr += width;
          avg_ptr  += width;
        }

      if (!preview)
        {
          progress += src_rgn.w * src_rgn.h;
          gimp_progress_update ((gdouble) progress / (gdouble) max_progress);
        }

      pr = gimp_pixel_rgns_process (pr);
    }

  if (preview)
    {
      gimp_preview_draw_buffer (preview, preview_buffer, width * bytes);
      g_free (preview_buffer);
    }
  else
    {
      /*  merge the shadow, update the drawable  */
      gimp_drawable_flush (drawable);
      gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
      gimp_drawable_update (drawable->drawable_id, x1, y1, width, height);
    }

  /*  free up buffers  */
  g_free (val_p1);
  g_free (val_p2);
  g_free (val_m1);
  g_free (val_m2);
  g_free (src);
  g_free (dest1);
  g_free (dest2);
}
示例#28
0
static void
ripple (GimpDrawable *drawable,
        GimpPreview  *preview)
{
  RippleParam_t param;
  gint          edges;
  gint          period;

  param.pft       = gimp_pixel_fetcher_new (drawable, FALSE);
  param.has_alpha = gimp_drawable_has_alpha (drawable->drawable_id);
  param.width     = drawable->width;
  param.height    = drawable->height;

  edges  = rvals.edges;
  period = rvals.period;

  if (rvals.tile)
    {
      rvals.edges = WRAP;
      rvals.period = (param.width / (param.width / rvals.period) *
                      (rvals.orientation == GIMP_ORIENTATION_HORIZONTAL) +
                      param.height / (param.height / rvals.period) *
                      (rvals.orientation == GIMP_ORIENTATION_VERTICAL));
    }

  if (preview)
    {
      guchar *buffer, *d;
      gint    bpp = gimp_drawable_bpp (drawable->drawable_id);
      gint    width, height;
      gint    x, y;
      gint    x1, y1;

      gimp_preview_get_position (preview, &x1, &y1);
      gimp_preview_get_size (preview, &width, &height);

      d = buffer = g_new (guchar, width * height * bpp);

      for (y = 0; y < height ; y++)
        for (x = 0; x < width ; x++)
          {
            if (rvals.orientation == GIMP_ORIENTATION_VERTICAL)
              ripple_vertical (x1 + x, y1 + y, d, bpp, &param);
            else
              ripple_horizontal (x1 + x, y1 + y, d, bpp, &param);

            d += bpp;
          }

      gimp_preview_draw_buffer (preview, buffer, width * bpp);
      g_free (buffer);
    }
  else
    {
      GimpRgnIterator *iter;

      iter = gimp_rgn_iterator_new (drawable, 0);

      gimp_rgn_iterator_dest (iter,
                              rvals.orientation == GIMP_ORIENTATION_VERTICAL ?
                              ripple_vertical :
                              ripple_horizontal,
                              &param);

      gimp_rgn_iterator_free (iter);
    }

  rvals.edges  = edges;
  rvals.period = period;

  gimp_pixel_fetcher_destroy (param.pft);
}
示例#29
0
/*
  This function operates on the image when pixelwidth >= tile_width.
  It simply sets the size of GimpPixelRgn as pixelwidth and proceeds.
 */
static void
pixelize_large (GimpDrawable *drawable,
                gint          pixelwidth,
                gint          pixelheight,
                GimpPreview  *preview)
{
  GimpPixelRgn  src_rgn, dest_rgn;
  guchar       *src_row, *dest_row;
  guchar       *src, *dest = NULL, *d;
  gulong        average[4];
  gint          row, col, b, bpp, has_alpha;
  gint          x, y, x_step, y_step;
  gint          i, j;
  gulong        count;
  gint          x1, y1, x2, y2;
  gint          width, height;
  gint          progress = 0, max_progress = 1;
  gpointer      pr;

  bpp = gimp_drawable_bpp (drawable->drawable_id);
  has_alpha = gimp_drawable_has_alpha (drawable->drawable_id);

  if (preview)
    {
      gimp_preview_get_position (preview, &x1, &y1);
      gimp_preview_get_size (preview, &width, &height);

      x2 = x1 + width;
      y2 = y1 + height;
      dest = g_new (guchar, width * height * bpp);
    }
  else
    {
      gimp_drawable_mask_bounds (drawable->drawable_id,
                                 &x1, &y1, &x2, &y2);
      width  = x2 - x1;
      height = y2 - y1;

      /* Initialize progress */
      progress = 0;
      max_progress = 2 * width * height;
    }

  for (y = y1; y < y2; y += pixelheight - (y % pixelheight))
    {
      for (x = x1; x < x2; x += pixelwidth - (x % pixelwidth))
        {
          x_step = pixelwidth  - (x % pixelwidth);
          y_step = pixelheight - (y % pixelheight);
          x_step = MIN (x_step, x2 - x);
          y_step = MIN (y_step, y2 - y);

          gimp_pixel_rgn_init (&src_rgn, drawable,
                               x, y, x_step, y_step, FALSE, FALSE);
          for (b = 0; b < bpp; b++)
            average[b] = 0;
          count = 0;

          for (pr = gimp_pixel_rgns_register (1, &src_rgn);
               pr != NULL;
               pr = gimp_pixel_rgns_process (pr))
            {
              src_row = src_rgn.data;
              for (row = 0; row < src_rgn.h; row++)
                {
                  src = src_row;
                  if (has_alpha)
                    {
                      for (col = 0; col < src_rgn.w; col++)
                        {
                          gulong alpha = src[bpp - 1];

                          average[bpp - 1] += alpha;
                          for (b = 0; b < bpp - 1; b++)
                            average[b] += src[b] * alpha;
                          src += src_rgn.bpp;
                        }
                    }
                  else
                    {
                      for (col = 0; col < src_rgn.w; col++)
                        {
                          for (b = 0; b < bpp; b++)
                            average[b] += src[b];
                          src += src_rgn.bpp;
                        }
                    }
                  src_row += src_rgn.rowstride;
                }
              count += src_rgn.w * src_rgn.h;
              if (!preview)
                {
                  /* Update progress */
                  progress += src_rgn.w * src_rgn.h;
                  gimp_progress_update ((double) progress / (double) max_progress);
                }
            }

          if (count > 0)
            {
              if (has_alpha)
                {
                  gulong alpha = average[bpp - 1];

                  if ((average[bpp - 1] = alpha / count))
                    for (b = 0; b < bpp - 1; b++)
                      average[b] /= alpha;
                }
              else
                {
                  for (b = 0; b < bpp; b++)
                    average[b] /= count;
                }
            }

          if (preview)
            {
              dest_row = dest + ((y - y1) * width + (x - x1)) * bpp;
              for (j = 0; j < y_step; j++)
                {
                  d = dest_row;
                  for (i = 0; i < x_step; i++)
                    for (b = 0; b < bpp; b++)
                      *d++ = average[b];
                  dest_row += width * bpp;
                }
            }
          else
            {
              gimp_pixel_rgn_init (&dest_rgn, drawable,
                                   x, y, x_step, y_step,
                                   TRUE, TRUE);
              for (pr = gimp_pixel_rgns_register (1, &dest_rgn);
                   pr != NULL;
                   pr = gimp_pixel_rgns_process (pr))
                {
                  dest_row = dest_rgn.data;
                  for (row = 0; row < dest_rgn.h; row++)
                    {
                    dest = dest_row;
                    for (col = 0; col < dest_rgn.w; col++)
                      {
                        for (b = 0; b < bpp; b++)
                          dest[b] = average[b];

                        dest  += dest_rgn.bpp;
                      }
                    dest_row += dest_rgn.rowstride;
                  }
                /* Update progress */
                progress += dest_rgn.w * dest_rgn.h;
                gimp_progress_update ((double) progress / (double) max_progress);
              }
            }
        }
    }

  if (preview)
    {
      gimp_preview_draw_buffer (preview, dest, width * bpp);
      g_free (dest);
    }
  else
    {
      /*  update the blurred region	 */
      gimp_drawable_flush (drawable);
      gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
      gimp_drawable_update (drawable->drawable_id, x1, y1, width, height);
    }
}
示例#30
0
static void
displace (GimpDrawable *drawable,
          GimpPreview  *preview)
{
  GimpDrawable     *map_x = NULL;
  GimpDrawable     *map_y = NULL;
  GimpPixelRgn      dest_rgn;
  GimpPixelRgn      map_x_rgn;
  GimpPixelRgn      map_y_rgn;
  gpointer          pr;
  GimpPixelFetcher *pft;

  gint              width;
  gint              height;
  gint              bytes;
  guchar           *destrow, *dest;
  guchar           *mxrow, *mx;
  guchar           *myrow, *my;
  guchar            pixel[4][4];
  gint              x1, y1, x2, y2;
  gint              x, y;
  gdouble           cx, cy;
  gint              progress, max_progress;

  gdouble           amnt;
  gdouble           needx, needy;
  gdouble           radius, d_alpha;
  gint              xi, yi;

  guchar            values[4];
  guchar            val;

  gint              k;

  gdouble           xm_val, ym_val;
  gint              xm_alpha = 0;
  gint              ym_alpha = 0;
  gint              xm_bytes = 1;
  gint              ym_bytes = 1;
  guchar           *buffer   = NULL;
  gdouble           pi;

  /* initialize */

  /* get rid of uninitialized warnings */
  cx = cy = needx = needy = radius = d_alpha = 0.0;

  pi = 4 * atan (1);

  mxrow = NULL;
  myrow = NULL;

  pft = gimp_pixel_fetcher_new (drawable, FALSE);
  gimp_pixel_fetcher_set_edge_mode (pft, dvals.displace_type);

  bytes  = drawable->bpp;

  gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
  width  = x2 - x1;
  height = y2 - y1;

  if (dvals.mode == POLAR_MODE)
    {
      cx = x1 + width / 2.0;
      cy = y1 + height / 2.0;
    }

  if (preview)
    {
      gimp_preview_get_position (preview, &x1, &y1);
      gimp_preview_get_size (preview, &width, &height);
      x2 = x1 + width;
      y2 = y1 + height;
      buffer = g_new (guchar, width * height * bytes);
    }

  progress     = 0;
  max_progress = width * height;

  /*
   * The algorithm used here is simple - see
   * http://the-tech.mit.edu/KPT/Tips/KPT7/KPT7.html for a description.
   */

  /* Get the drawables  */
  if (dvals.displace_map_x != -1 && dvals.do_x)
    {
      map_x = gimp_drawable_get (dvals.displace_map_x);
      gimp_pixel_rgn_init (&map_x_rgn, map_x,
                           x1, y1, width, height, FALSE, FALSE);

      if (gimp_drawable_has_alpha (map_x->drawable_id))
        xm_alpha = 1;

      xm_bytes = gimp_drawable_bpp (map_x->drawable_id);
    }

  if (dvals.displace_map_y != -1 && dvals.do_y)
    {
      map_y = gimp_drawable_get (dvals.displace_map_y);
      gimp_pixel_rgn_init (&map_y_rgn, map_y,
                           x1, y1, width, height, FALSE, FALSE);

      if (gimp_drawable_has_alpha (map_y->drawable_id))
        ym_alpha = 1;

      ym_bytes = gimp_drawable_bpp (map_y->drawable_id);
    }

  gimp_pixel_rgn_init (&dest_rgn, drawable,
                       x1, y1, width, height,
                       preview == NULL, preview == NULL);

  /*  Register the pixel regions  */
  if (dvals.do_x && dvals.do_y)
    pr = gimp_pixel_rgns_register (3, &dest_rgn, &map_x_rgn, &map_y_rgn);
  else if (dvals.do_x)
    pr = gimp_pixel_rgns_register (2, &dest_rgn, &map_x_rgn);
  else if (dvals.do_y)
    pr = gimp_pixel_rgns_register (2, &dest_rgn, &map_y_rgn);
  else
    pr = NULL;

  for (pr = pr; pr != NULL; pr = gimp_pixel_rgns_process (pr))
    {
      destrow = dest_rgn.data;
      if (dvals.do_x)
        mxrow = map_x_rgn.data;
      if (dvals.do_y)
        myrow = map_y_rgn.data;

      for (y = dest_rgn.y; y < (dest_rgn.y + dest_rgn.h); y++)
        {
          if (preview)
            dest = buffer + ((y - y1) * width + (dest_rgn.x - x1)) * bytes;
          else
            dest = destrow;
          mx = mxrow;
          my = myrow;

          /*
           * We could move the displacement image address calculation
           * out of here, but when we can have different sized
           * displacement and destination images we'd have to move it
           * back anyway.
           */

          for (x = dest_rgn.x; x < (dest_rgn.x + dest_rgn.w); x++)
            {
              if (dvals.do_x)
                {
                  xm_val = displace_map_give_value(mx, xm_alpha, xm_bytes);
                  amnt = dvals.amount_x * (xm_val - 127.5) / 127.5;
                  /* CARTESIAN_MODE == 0 - performance important here */
                  if (! dvals.mode)
                    {
                      needx = x + amnt;
                    }
                  else
                    {
                      radius = sqrt (SQR (x - cx) + SQR (y - cy)) + amnt;
                    }
                  mx += xm_bytes;
                }
              else
                {
                  if (! dvals.mode)
                    needx = x;
                  else
                    radius = sqrt ((x - cx) * (x - cx) + (y - cy) * (y - cy));
                }


              if (dvals.do_y)
                {
                  ym_val = displace_map_give_value(my, ym_alpha, ym_bytes);
                  amnt = dvals.amount_y * (ym_val - 127.5) / 127.5;
                  if (! dvals.mode)
                    {
                      needy = y + amnt;
                    }
                  else
                    {
                      d_alpha = atan2 (x - cx, y - cy) + (dvals.amount_y / 180)
                                * pi * (ym_val - 127.5) / 127.5;
                    }
                  my += ym_bytes;
                }
              else
                {
                  if (! dvals.mode)
                    needy = y;
                  else
                    d_alpha = atan2 (x - cx, y - cy);
                }
              if (dvals.mode)
                {
                   needx = cx + radius * sin (d_alpha);
                   needy = cy + radius * cos (d_alpha);
                }
              /* Calculations complete; now copy the proper pixel */

              if (needx >= 0.0)
                xi = (int) needx;
              else
                xi = -((int) -needx + 1);

              if (needy >= 0.0)
                yi = (int) needy;
              else
                yi = -((int) -needy + 1);

              gimp_pixel_fetcher_get_pixel (pft, xi, yi, pixel[0]);
              gimp_pixel_fetcher_get_pixel (pft, xi + 1, yi, pixel[1]);
              gimp_pixel_fetcher_get_pixel (pft, xi, yi + 1, pixel[2]);
              gimp_pixel_fetcher_get_pixel (pft, xi + 1, yi + 1, pixel[3]);

              for (k = 0; k < bytes; k++)
                {
                  values[0] = pixel[0][k];
                  values[1] = pixel[1][k];
                  values[2] = pixel[2][k];
                  values[3] = pixel[3][k];
                  val = gimp_bilinear_8 (needx, needy, values);

                  *dest++ = val;
                } /* for */
            }

          destrow += dest_rgn.rowstride;

          if (dvals.do_x)
            mxrow += map_x_rgn.rowstride;
          if (dvals.do_y)
            myrow += map_y_rgn.rowstride;
        }

      if (!preview)
        {
          progress += dest_rgn.w * dest_rgn.h;
          gimp_progress_update ((double) progress / (double) max_progress);
        }
    } /* for */

  gimp_pixel_fetcher_destroy (pft);

  /*  detach from the map drawables  */
  if (dvals.do_x)
    gimp_drawable_detach (map_x);
  if (dvals.do_y)
    gimp_drawable_detach (map_y);

  if (preview)
    {
/*      gimp_drawable_preview_draw_region (GIMP_DRAWABLE_PREVIEW (preview),
                                         &dest_rgn);*/
      gimp_preview_draw_buffer (preview, buffer, width * bytes);
      g_free (buffer);
    }
  else
    {
      /*  update the region  */
      gimp_drawable_flush (drawable);
      gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
      gimp_drawable_update (drawable->drawable_id, x1, y1, width, height);
    }
}