Beispiel #1
0
static void
gimp_eraser_motion (GimpPaintCore    *paint_core,
                    GimpDrawable     *drawable,
                    GimpPaintOptions *paint_options)
{
  GimpEraserOptions *options = GIMP_ERASER_OPTIONS (paint_options);
  GimpContext       *context = GIMP_CONTEXT (paint_options);
  GimpImage         *image;
  gdouble            opacity;
  TempBuf           *area;
  guchar             col[MAX_CHANNELS];
  gdouble            hardness;

  image = gimp_item_get_image (GIMP_ITEM (drawable));

  opacity = gimp_paint_options_get_fade (paint_options, image,
                                         paint_core->pixel_dist);
  if (opacity == 0.0)
    return;

  area = gimp_paint_core_get_paint_area (paint_core, drawable, paint_options);
  if (! area)
    return;

  gimp_image_get_background (image, context, gimp_drawable_type (drawable),
                             col);

  /*  set the alpha channel  */
  col[area->bytes - 1] = OPAQUE_OPACITY;

  /*  color the pixels  */
  color_pixels (temp_buf_data (area), col,
                area->width * area->height, area->bytes);

  opacity *= gimp_paint_options_get_dynamic_opacity (paint_options,
                                                     &paint_core->cur_coords);

  hardness = gimp_paint_options_get_dynamic_hardness (paint_options,
                                                      &paint_core->cur_coords);

  gimp_brush_core_paste_canvas (GIMP_BRUSH_CORE (paint_core), drawable,
                                MIN (opacity, GIMP_OPACITY_OPAQUE),
                                gimp_context_get_opacity (context),
                                (options->anti_erase ?
                                 GIMP_ANTI_ERASE_MODE : GIMP_ERASE_MODE),
                                gimp_paint_options_get_brush_mode (paint_options),
                                hardness,
                                paint_options->application_mode);
}
static void
gimp_eraser_motion (GimpPaintCore    *paint_core,
                    GimpDrawable     *drawable,
                    GimpPaintOptions *paint_options,
                    const GimpCoords *coords)
{
  GimpEraserOptions  *options  = GIMP_ERASER_OPTIONS (paint_options);
  GimpContext        *context  = GIMP_CONTEXT (paint_options);
  GimpDynamics       *dynamics = GIMP_BRUSH_CORE (paint_core)->dynamics;
  GimpDynamicsOutput *opacity_output;
  GimpDynamicsOutput *force_output;
  GimpImage          *image;
  gdouble             fade_point;
  gdouble             opacity;
  TempBuf            *area;
  guchar              col[MAX_CHANNELS];
  gdouble             force;

  image = gimp_item_get_image (GIMP_ITEM (drawable));

  opacity_output = gimp_dynamics_get_output (dynamics,
                                             GIMP_DYNAMICS_OUTPUT_OPACITY);

  fade_point = gimp_paint_options_get_fade (paint_options,
                                            gimp_item_get_image (GIMP_ITEM (drawable)),
                                            paint_core->pixel_dist);

  opacity = gimp_dynamics_output_get_linear_value (opacity_output,
                                                   coords,
                                                   paint_options,
                                                   fade_point);
  if (opacity == 0.0)
    return;

  area = gimp_paint_core_get_paint_area (paint_core, drawable, paint_options,
                                         coords);
  if (! area)
    return;

  gimp_image_get_background (image, context, gimp_drawable_type (drawable),
                             col);

  /*  set the alpha channel  */
  col[area->bytes - 1] = OPAQUE_OPACITY;

  /*  color the pixels  */
  color_pixels (temp_buf_get_data (area), col,
                area->width * area->height, area->bytes);

  force_output = gimp_dynamics_get_output (dynamics,
                                           GIMP_DYNAMICS_OUTPUT_FORCE);

  force = gimp_dynamics_output_get_linear_value (force_output,
                                                 coords,
                                                 paint_options,
                                                 fade_point);

  gimp_brush_core_paste_canvas (GIMP_BRUSH_CORE (paint_core), drawable,
                                coords,
                                MIN (opacity, GIMP_OPACITY_OPAQUE),
                                gimp_context_get_opacity (context),
                                (options->anti_erase ?
                                 GIMP_ANTI_ERASE_MODE : GIMP_ERASE_MODE),
                                gimp_paint_options_get_brush_mode (paint_options),
                                force,
                                paint_options->application_mode);
}
Beispiel #3
0
static GimpLayer *
gimp_image_merge_layers (GimpImage     *image,
                         GSList        *merge_list,
                         GimpContext   *context,
                         GimpMergeType  merge_type,
                         const gchar   *undo_desc)
{
  GList           *list;
  GSList          *reverse_list = NULL;
  PixelRegion      src1PR, src2PR, maskPR;
  PixelRegion     *mask;
  GimpLayer       *merge_layer;
  GimpLayer       *layer;
  GimpLayer       *bottom_layer;
  GimpImageType    type;
  gint             count;
  gint             x1, y1, x2, y2;
  gint             x3, y3, x4, y4;
  CombinationMode  operation;
  gint             position;
  gboolean         active[MAX_CHANNELS] = { TRUE, TRUE, TRUE, TRUE };
  gint             off_x, off_y;
  gchar           *name;

  g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
  g_return_val_if_fail (GIMP_IS_CONTEXT (context), NULL);

  layer        = NULL;
  type         = GIMP_RGBA_IMAGE;
  x1 = y1      = 0;
  x2 = y2      = 0;
  bottom_layer = NULL;

  /*  Get the layer extents  */
  count = 0;
  while (merge_list)
    {
      layer = merge_list->data;

      gimp_item_offsets (GIMP_ITEM (layer), &off_x, &off_y);

      switch (merge_type)
        {
        case GIMP_EXPAND_AS_NECESSARY:
        case GIMP_CLIP_TO_IMAGE:
          if (! count)
            {
              x1 = off_x;
              y1 = off_y;
              x2 = off_x + gimp_item_width  (GIMP_ITEM (layer));
              y2 = off_y + gimp_item_height (GIMP_ITEM (layer));
            }
          else
            {
              if (off_x < x1)
                x1 = off_x;
              if (off_y < y1)
                y1 = off_y;
              if ((off_x + gimp_item_width (GIMP_ITEM (layer))) > x2)
                x2 = (off_x + gimp_item_width (GIMP_ITEM (layer)));
              if ((off_y + gimp_item_height (GIMP_ITEM (layer))) > y2)
                y2 = (off_y + gimp_item_height (GIMP_ITEM (layer)));
            }

          if (merge_type == GIMP_CLIP_TO_IMAGE)
            {
              x1 = CLAMP (x1, 0, gimp_image_get_width  (image));
              y1 = CLAMP (y1, 0, gimp_image_get_height (image));
              x2 = CLAMP (x2, 0, gimp_image_get_width  (image));
              y2 = CLAMP (y2, 0, gimp_image_get_height (image));
            }
          break;

        case GIMP_CLIP_TO_BOTTOM_LAYER:
          if (merge_list->next == NULL)
            {
              x1 = off_x;
              y1 = off_y;
              x2 = off_x + gimp_item_width (GIMP_ITEM (layer));
              y2 = off_y + gimp_item_height (GIMP_ITEM (layer));
            }
          break;

        case GIMP_FLATTEN_IMAGE:
          if (merge_list->next == NULL)
            {
              x1 = 0;
              y1 = 0;
              x2 = gimp_image_get_width  (image);
              y2 = gimp_image_get_height (image);
            }
          break;
        }

      count ++;
      reverse_list = g_slist_prepend (reverse_list, layer);
      merge_list = g_slist_next (merge_list);
    }

  if ((x2 - x1) == 0 || (y2 - y1) == 0)
    return NULL;

  /*  Start a merge undo group. */

  gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_IMAGE_LAYERS_MERGE,
                               undo_desc);

  name = g_strdup (gimp_object_get_name (GIMP_OBJECT (layer)));

  if (merge_type == GIMP_FLATTEN_IMAGE ||
      gimp_drawable_type (GIMP_DRAWABLE (layer)) == GIMP_INDEXED_IMAGE)
    {
      guchar bg[4] = { 0, 0, 0, 0 };

      type = GIMP_IMAGE_TYPE_FROM_BASE_TYPE (gimp_image_base_type (image));

      merge_layer = gimp_layer_new (image, (x2 - x1), (y2 - y1),
                                    type,
                                    gimp_object_get_name (GIMP_OBJECT (layer)),
                                    GIMP_OPACITY_OPAQUE, GIMP_NORMAL_MODE);
      if (! merge_layer)
        {
          g_warning ("%s: could not allocate merge layer.", G_STRFUNC);
          return NULL;
        }

      GIMP_ITEM (merge_layer)->offset_x = x1;
      GIMP_ITEM (merge_layer)->offset_y = y1;

      /*  get the background for compositing  */
      gimp_image_get_background (image, context,
                                 gimp_drawable_type (GIMP_DRAWABLE (merge_layer)),
                                 bg);

      /*  init the pixel region  */
      pixel_region_init (&src1PR,
                         gimp_drawable_get_tiles (GIMP_DRAWABLE (merge_layer)),
                         0, 0, (x2 - x1), (y2 - y1),
                         TRUE);

      /*  set the region to the background color  */
      color_region (&src1PR, bg);

      position = 0;
    }
  else
    {
      /*  The final merged layer inherits the name of the bottom most layer
       *  and the resulting layer has an alpha channel whether or not the
       *  original did. Opacity is set to 100% and the MODE is set to normal.
       */

      merge_layer =
        gimp_layer_new (image, (x2 - x1), (y2 - y1),
                        gimp_drawable_type_with_alpha (GIMP_DRAWABLE (layer)),
                        "merged layer",
                        GIMP_OPACITY_OPAQUE, GIMP_NORMAL_MODE);

      if (!merge_layer)
        {
          g_warning ("%s: could not allocate merge layer", G_STRFUNC);
          return NULL;
        }

      GIMP_ITEM (merge_layer)->offset_x = x1;
      GIMP_ITEM (merge_layer)->offset_y = y1;

      /*  clear the layer  */
      pixel_region_init (&src1PR,
                         gimp_drawable_get_tiles (GIMP_DRAWABLE (merge_layer)),
                         0, 0,
                         (x2 - x1), (y2 - y1),
                         TRUE);
      clear_region (&src1PR);

      /*  Find the index in the layer list of the bottom layer--we need this
       *  in order to add the final, merged layer to the layer list correctly
       */
      layer = reverse_list->data;
      position =
        gimp_container_num_children (image->layers) -
        gimp_container_get_child_index (image->layers, GIMP_OBJECT (layer));
    }

  bottom_layer = layer;

  /* Copy the tattoo and parasites of the bottom layer to the new layer */
  gimp_item_set_tattoo (GIMP_ITEM (merge_layer),
                        gimp_item_get_tattoo (GIMP_ITEM (bottom_layer)));

  g_object_unref (GIMP_ITEM (merge_layer)->parasites);
  GIMP_ITEM (merge_layer)->parasites =
    gimp_parasite_list_copy (GIMP_ITEM (bottom_layer)->parasites);

  while (reverse_list)
    {
      GimpLayerModeEffects  mode;

      layer = reverse_list->data;

      /*  determine what sort of operation is being attempted and
       *  if it's actually legal...
       */
      operation = gimp_image_merge_layers_get_operation (merge_layer, layer);

      if (operation == -1)
        {
          gimp_layer_add_alpha (layer);

          /*  try again ...  */
          operation = gimp_image_merge_layers_get_operation (merge_layer,
                                                             layer);
        }

      if (operation == -1)
        {
          g_warning ("%s: attempting to merge incompatible layers.", G_STRFUNC);
          return NULL;
        }

      gimp_item_offsets (GIMP_ITEM (layer), &off_x, &off_y);

      x3 = CLAMP (off_x, x1, x2);
      y3 = CLAMP (off_y, y1, y2);
      x4 = CLAMP (off_x + gimp_item_width  (GIMP_ITEM (layer)), x1, x2);
      y4 = CLAMP (off_y + gimp_item_height (GIMP_ITEM (layer)), y1, y2);

      /* configure the pixel regions  */
      pixel_region_init (&src1PR,
                         gimp_drawable_get_tiles (GIMP_DRAWABLE (merge_layer)),
                         (x3 - x1), (y3 - y1), (x4 - x3), (y4 - y3),
                         TRUE);
      pixel_region_init (&src2PR,
                         gimp_drawable_get_tiles (GIMP_DRAWABLE (layer)),
                         (x3 - off_x), (y3 - off_y),
                         (x4 - x3), (y4 - y3),
                         FALSE);

      if (gimp_layer_get_mask (layer) &&
          gimp_layer_mask_get_apply (layer->mask))
        {
          TileManager *tiles;

          tiles = gimp_drawable_get_tiles (GIMP_DRAWABLE (layer->mask));

          pixel_region_init (&maskPR, tiles,
                             (x3 - off_x), (y3 - off_y), (x4 - x3), (y4 - y3),
                             FALSE);
          mask = &maskPR;
        }
      else
        {
          mask = NULL;
        }

      /* DISSOLVE_MODE is special since it is the only mode that does not
       *  work on the projection with the lower layer, but only locally on
       *  the layers alpha channel.
       */
      mode = gimp_layer_get_mode (layer);
      if (layer == bottom_layer && mode != GIMP_DISSOLVE_MODE)
        mode = GIMP_NORMAL_MODE;

      combine_regions (&src1PR, &src2PR, &src1PR, mask, NULL,
                       gimp_layer_get_opacity (layer) * 255.999,
                       mode,
                       active,
                       operation);

      gimp_image_remove_layer (image, layer);

      reverse_list = g_slist_next (reverse_list);
    }

  g_slist_free (reverse_list);

  /*  if the type is flatten, remove all the remaining layers  */
  if (merge_type == GIMP_FLATTEN_IMAGE)
    {
      list = GIMP_LIST (image->layers)->list;
      while (list)
        {
          layer = list->data;

          list = g_list_next (list);
          gimp_image_remove_layer (image, layer);
        }

      gimp_image_add_layer (image, merge_layer, position);
    }
  else
    {
      /*  Add the layer to the image  */
      gimp_image_add_layer (image, merge_layer,
         gimp_container_num_children (image->layers) - position + 1);
    }

  /* set the name after the original layers have been removed so we
   * don't end up with #2 appended to the name
   */
  gimp_object_take_name (GIMP_OBJECT (merge_layer), name);

  gimp_item_set_visible (GIMP_ITEM (merge_layer), TRUE, TRUE);

  /*  End the merge undo group  */
  gimp_image_undo_group_end (image);

  gimp_drawable_update (GIMP_DRAWABLE (merge_layer),
                        0, 0,
                        gimp_item_width  (GIMP_ITEM (merge_layer)),
                        gimp_item_height (GIMP_ITEM (merge_layer)));

  return merge_layer;
}