예제 #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);
}
예제 #2
0
static void
gimp_eraser_options_get_property (GObject    *object,
                                 guint       property_id,
                                 GValue     *value,
                                 GParamSpec *pspec)
{
  GimpEraserOptions *options = GIMP_ERASER_OPTIONS (object);

  switch (property_id)
    {
    case PROP_ANTI_ERASE:
      g_value_set_boolean (value, options->anti_erase);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
      break;
    }
}
예제 #3
0
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);
}