C++ GIMP_CONTEXT函数代码示例

static void
tool_manager_preset_changed (GimpContext     *user_context,
                             GimpToolPreset  *preset,
                             GimpToolManager *tool_manager)
{
  GimpToolInfo *preset_tool;
  gboolean      tool_change = FALSE;

  if (! preset || user_context->gimp->busy)
    return;

  preset_tool = gimp_context_get_tool (GIMP_CONTEXT (preset->tool_options));

  if (preset_tool != gimp_context_get_tool (user_context))
    tool_change = TRUE;

  if (! tool_change)
    tool_manager_disconnect_options (user_context, preset_tool);

  gimp_config_copy (GIMP_CONFIG (preset->tool_options),
                    GIMP_CONFIG (preset_tool->tool_options), 0);

  if (tool_change)
    gimp_context_set_tool (user_context, preset_tool);
  else
    tool_manager_connect_options (user_context, preset_tool);

  gimp_context_copy_properties (GIMP_CONTEXT (preset->tool_options),
                                user_context,
                                gimp_tool_preset_get_prop_mask (preset));
}

static void
tool_manager_connect_options (GimpContext  *user_context,
                              GimpToolInfo *tool_info)
{
  if (tool_info->context_props)
    {
      GimpCoreConfig      *config       = user_context->gimp->config;
      GimpContextPropMask  global_props = 0;

      /*  FG and BG are always shared between all tools  */
      global_props |= GIMP_CONTEXT_FOREGROUND_MASK;
      global_props |= GIMP_CONTEXT_BACKGROUND_MASK;

      if (config->global_brush)
        global_props |= GIMP_CONTEXT_BRUSH_MASK;
      if (config->global_dynamics)
        global_props |= GIMP_CONTEXT_DYNAMICS_MASK;
      if (config->global_pattern)
        global_props |= GIMP_CONTEXT_PATTERN_MASK;
      if (config->global_palette)
        global_props |= GIMP_CONTEXT_PALETTE_MASK;
      if (config->global_gradient)
        global_props |= GIMP_CONTEXT_GRADIENT_MASK;
      if (config->global_font)
        global_props |= GIMP_CONTEXT_FONT_MASK;

      gimp_context_copy_properties (GIMP_CONTEXT (tool_info->tool_options),
                                    user_context,
                                    tool_info->context_props & ~global_props);
      gimp_context_set_parent (GIMP_CONTEXT (tool_info->tool_options),
                               user_context);
    }
}

gboolean
gimp_paint_options_get_gradient_color (GimpPaintOptions *paint_options,
                                       GimpImage        *image,
                                       gdouble           grad_point,
                                       gdouble           pixel_dist,
                                       GimpRGB          *color)
{
  GimpDynamics *dynamics;

  g_return_val_if_fail (GIMP_IS_PAINT_OPTIONS (paint_options), FALSE);
  g_return_val_if_fail (GIMP_IS_IMAGE (image), FALSE);
  g_return_val_if_fail (color != NULL, FALSE);

  dynamics = gimp_context_get_dynamics (GIMP_CONTEXT (paint_options));

  if (gimp_dynamics_is_output_enabled (dynamics, GIMP_DYNAMICS_OUTPUT_COLOR))
    {
      GimpGradientOptions *gradient_options = paint_options->gradient_options;
      GimpGradient        *gradient;

      gradient = gimp_context_get_gradient (GIMP_CONTEXT (paint_options));

      gimp_gradient_get_color_at (gradient, GIMP_CONTEXT (paint_options),
                                  NULL, grad_point,
                                  gradient_options->gradient_reverse,
                                  color);

      return TRUE;
    }

  return FALSE;
}

static void
gimp_pdb_context_constructed (GObject *object)
{
  GimpInterpolationType  interpolation;
  gint                   threshold;
  GParamSpec            *pspec;

  G_OBJECT_CLASS (parent_class)->constructed (object);

  /* get default interpolation from gimprc */

  interpolation = GIMP_CONTEXT (object)->gimp->config->interpolation_type;

  pspec = g_object_class_find_property (G_OBJECT_GET_CLASS (object),
                                        "interpolation");

  if (pspec)
    G_PARAM_SPEC_ENUM (pspec)->default_value = interpolation;

  g_object_set (object, "interpolation", interpolation, NULL);

  /* get default threshold from gimprc */

  threshold = GIMP_CONTEXT (object)->gimp->config->default_threshold;

  pspec = g_object_class_find_property (G_OBJECT_GET_CLASS (object),
                                        "sample-threshold");

  if (pspec)
    G_PARAM_SPEC_DOUBLE (pspec)->default_value = threshold / 255.0;

  g_object_set (object, "sample-threshold", threshold / 255.0, NULL);
}

void
gimp_edit_fill (GimpImage       *image,
                GimpDrawable    *drawable,
                GimpFillOptions *options,
                const gchar     *undo_desc)
{
  GeglBuffer  *buffer;
  gint         x, y, width, height;

  g_return_if_fail (GIMP_IS_IMAGE (image));
  g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
  g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)));
  g_return_if_fail (GIMP_IS_FILL_OPTIONS (options));

  if (! gimp_item_mask_intersect (GIMP_ITEM (drawable), &x, &y, &width, &height))
    return;  /*  nothing to do, but the fill succeeded  */

  buffer = gimp_fill_options_create_buffer (options, drawable,
                                            GEGL_RECTANGLE (0, 0,
                                                            width, height));

  if (! undo_desc)
    undo_desc = gimp_fill_options_get_undo_desc (options);

  gimp_drawable_apply_buffer (drawable, buffer,
                              GEGL_RECTANGLE (0, 0, width, height),
                              TRUE, undo_desc,
                              gimp_context_get_opacity (GIMP_CONTEXT (options)),
                              gimp_context_get_paint_mode (GIMP_CONTEXT (options)),
                              NULL, x, y);

  g_object_unref (buffer);

  gimp_drawable_update (drawable, x, y, width, height);
}

static void
tool_manager_preset_changed (GimpContext     *user_context,
                             GimpToolPreset  *preset,
                             GimpToolManager *tool_manager)
{
  GimpToolInfo *preset_tool;
  gchar        *options_name;
  gboolean      tool_change = FALSE;

  if (! preset || user_context->gimp->busy)
    return;

  preset_tool = gimp_context_get_tool (GIMP_CONTEXT (preset->tool_options));

  if (preset_tool != gimp_context_get_tool (user_context))
    tool_change = TRUE;

  /*  save the name, we don't want to overwrite it  */
  options_name = g_strdup (gimp_object_get_name (preset_tool->tool_options));

  gimp_config_copy (GIMP_CONFIG (preset->tool_options),
                    GIMP_CONFIG (preset_tool->tool_options), 0);

  /*  restore the saved name  */
  gimp_object_take_name (GIMP_OBJECT (preset_tool->tool_options), options_name);

  if (tool_change)
    gimp_context_set_tool (user_context, preset_tool);

  gimp_context_copy_properties (GIMP_CONTEXT (preset->tool_options),
                                user_context,
                                gimp_tool_preset_get_prop_mask (preset));

  if (GIMP_IS_PAINT_OPTIONS (preset->tool_options))
    {
      GimpToolOptions     *src;
      GimpToolOptions     *dest;
      GimpContextPropMask  prop_mask = 0;

      src  = preset->tool_options;
      dest = tool_manager->active_tool->tool_info->tool_options;

      /*  copy various data objects' additional tool options again
       *  manually, they might have been overwritten by e.g. the "link
       *  brush stuff to brush defaults" logic in gimptooloptions.c
       */
      if (preset->use_brush)
        prop_mask |= GIMP_CONTEXT_PROP_MASK_BRUSH;

      if (preset->use_dynamics)
        prop_mask |= GIMP_CONTEXT_PROP_MASK_DYNAMICS;

      if (preset->use_gradient)
        prop_mask |= GIMP_CONTEXT_PROP_MASK_GRADIENT;

      gimp_paint_options_copy_props (GIMP_PAINT_OPTIONS (src),
                                     GIMP_PAINT_OPTIONS (dest),
                                     prop_mask);
    }
}

static void
gimp_device_info_constructed (GObject *object)
{
  GimpDeviceInfo *info = GIMP_DEVICE_INFO (object);
  Gimp           *gimp;

  G_OBJECT_CLASS (parent_class)->constructed (object);

  g_assert ((info->device == NULL         && info->display == NULL) ||
            (GDK_IS_DEVICE (info->device) && GDK_IS_DISPLAY (info->display)));

  gimp = GIMP_CONTEXT (object)->gimp;

  if (info->device)
    {
      g_object_set_data (G_OBJECT (info->device), GIMP_DEVICE_INFO_DATA_KEY,
                         info);

      gimp_object_set_name (GIMP_OBJECT (info), info->device->name);

      info->mode    = info->device->mode;
      info->n_axes  = info->device->num_axes;
      info->n_keys  = info->device->num_keys;
    }

  gimp_context_define_properties (GIMP_CONTEXT (object),
                                  GIMP_DEVICE_INFO_CONTEXT_MASK,
                                  FALSE);
  gimp_context_copy_properties (gimp_get_user_context (gimp),
                                GIMP_CONTEXT (object),
                                GIMP_DEVICE_INFO_CONTEXT_MASK);

  gimp_context_set_serialize_properties (GIMP_CONTEXT (object),
                                         GIMP_DEVICE_INFO_CONTEXT_MASK);

  /*  FIXME: this is ugly and needs to be done via "notify" once
   *  the contexts' properties are dynamic.
   */
  g_signal_connect (object, "foreground-changed",
                    G_CALLBACK (gimp_device_info_changed),
                    NULL);
  g_signal_connect (object, "background-changed",
                    G_CALLBACK (gimp_device_info_changed),
                    NULL);
  g_signal_connect (object, "tool-changed",
                    G_CALLBACK (gimp_device_info_changed),
                    NULL);
  g_signal_connect (object, "brush-changed",
                    G_CALLBACK (gimp_device_info_changed),
                    NULL);
  g_signal_connect (object, "pattern-changed",
                    G_CALLBACK (gimp_device_info_changed),
                    NULL);
  g_signal_connect (object, "gradient-changed",
                    G_CALLBACK (gimp_device_info_changed),
                    NULL);
}

static gboolean
gimp_crop_tool_execute (GimpRectangleTool  *rectangle,
                        gint                x,
                        gint                y,
                        gint                w,
                        gint                h)
{
  GimpTool        *tool    = GIMP_TOOL (rectangle);
  GimpCropOptions *options = GIMP_CROP_TOOL_GET_OPTIONS (tool);
  GimpImage       *image   = gimp_display_get_image (tool->display);

  gimp_tool_pop_status (tool, tool->display);

  /* if rectangle exists, crop it */
  if (w > 0 && h > 0)
    {
      if (options->layer_only)
        {
          GimpLayer *layer = gimp_image_get_active_layer (image);
          gint       off_x, off_y;

          if (! layer)
            {
              gimp_tool_message_literal (tool, tool->display,
                                         _("There is no active layer to crop."));
              return FALSE;
            }

          if (gimp_item_is_content_locked (GIMP_ITEM (layer)))
            {
              gimp_tool_message_literal (tool, tool->display,
                                         _("The active layer's pixels are locked."));
              return FALSE;
            }

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

          off_x -= x;
          off_y -= y;

          gimp_item_resize (GIMP_ITEM (layer), GIMP_CONTEXT (options),
                            w, h, off_x, off_y);
        }
      else
        {
          gimp_image_crop (image, GIMP_CONTEXT (options),
                           x, y, w + x, h + y,
                           TRUE);
        }

      gimp_image_flush (image);

      return TRUE;
    }

  return TRUE;
}

void
gimp_devices_restore (Gimp *gimp)
{
  GimpDeviceManager *manager;
  GimpContext       *user_context;
  GimpDeviceInfo    *current_device;
  GList             *list;
  gchar             *filename;
  GError            *error = NULL;

  g_return_if_fail (GIMP_IS_GIMP (gimp));

  manager = gimp_devices_get_manager (gimp);

  g_return_if_fail (GIMP_IS_DEVICE_MANAGER (manager));

  user_context = gimp_get_user_context (gimp);

  for (list = GIMP_LIST (manager)->list;
       list;
       list = g_list_next (list))
    {
      GimpDeviceInfo *device_info = list->data;

      gimp_context_copy_properties (user_context, GIMP_CONTEXT (device_info),
                                    GIMP_DEVICE_INFO_CONTEXT_MASK);

      gimp_device_info_set_default_tool (device_info);
    }

  filename = gimp_personal_rc_file ("devicerc");

  if (gimp->be_verbose)
    g_print ("Parsing '%s'\n", gimp_filename_to_utf8 (filename));

  if (! gimp_config_deserialize_file (GIMP_CONFIG (manager),
                                      filename,
                                      gimp,
                                      &error))
    {
      if (error->code != GIMP_CONFIG_ERROR_OPEN_ENOENT)
        gimp_message_literal (gimp, NULL, GIMP_MESSAGE_ERROR, error->message);

      g_error_free (error);
      /* don't bail out here */
    }

  g_free (filename);

  current_device = gimp_device_manager_get_current_device (manager);

  gimp_context_copy_properties (GIMP_CONTEXT (current_device), user_context,
                                GIMP_DEVICE_INFO_CONTEXT_MASK);
  gimp_context_set_parent (GIMP_CONTEXT (current_device), user_context);
}

GimpContext *
gimp_pdb_context_new (Gimp        *gimp,
                      GimpContext *parent,
                      gboolean     set_parent)
{
  GimpPDBContext *context;
  GList          *list;

  g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
  g_return_val_if_fail (GIMP_IS_CONTEXT (parent), NULL);

  context = g_object_new (GIMP_TYPE_PDB_CONTEXT,
                          "gimp", gimp,
                          "name", "PDB Context",
                          NULL);

  gimp_config_sync (G_OBJECT (parent), G_OBJECT (context), 0);

  if (set_parent)
    {
      gimp_context_define_properties (GIMP_CONTEXT (context),
                                      GIMP_CONTEXT_ALL_PROPS_MASK, FALSE);
      gimp_context_set_parent (GIMP_CONTEXT (context), parent);

      for (list = gimp_get_paint_info_iter (gimp);
           list;
           list = g_list_next (list))
        {
          GimpPaintInfo *info = list->data;

          gimp_container_add (context->paint_options_list,
                              GIMP_OBJECT (info->paint_options));
        }
    }
  else
    {
      for (list = GIMP_LIST (GIMP_PDB_CONTEXT (parent)->paint_options_list)->list;
           list;
           list = g_list_next (list))
        {
          GimpPaintOptions *options = gimp_config_duplicate (list->data);

          gimp_container_add (context->paint_options_list,
                              GIMP_OBJECT (options));
          g_object_unref (options);
        }
    }

  return GIMP_CONTEXT (context);
}

void
gimp_drawable_bucket_fill (GimpDrawable         *drawable,
                           GimpFillOptions      *options,
                           gboolean              fill_transparent,
                           GimpSelectCriterion   fill_criterion,
                           gdouble               threshold,
                           gboolean              sample_merged,
                           gboolean              diagonal_neighbors,
                           gdouble               seed_x,
                           gdouble               seed_y)
{
  GimpImage  *image;
  GeglBuffer *buffer;
  gdouble     mask_x;
  gdouble     mask_y;
  gint        width, height;

  g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
  g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)));
  g_return_if_fail (GIMP_IS_FILL_OPTIONS (options));

  image = gimp_item_get_image (GIMP_ITEM (drawable));
  gimp_set_busy (image->gimp);
  buffer = gimp_drawable_get_bucket_fill_buffer (drawable, options,
                                                 fill_transparent, fill_criterion,
                                                 threshold, sample_merged,
                                                 diagonal_neighbors,
                                                 seed_x, seed_y, NULL,
                                                 &mask_x, &mask_y, &width, &height);

  if (buffer)
    {
      /*  Apply it to the image  */
      gimp_drawable_apply_buffer (drawable, buffer,
                                  GEGL_RECTANGLE (0, 0, width, height),
                                  TRUE, C_("undo-type", "Bucket Fill"),
                                  gimp_context_get_opacity (GIMP_CONTEXT (options)),
                                  gimp_context_get_paint_mode (GIMP_CONTEXT (options)),
                                  GIMP_LAYER_COLOR_SPACE_AUTO,
                                  GIMP_LAYER_COLOR_SPACE_AUTO,
                                  gimp_layer_mode_get_paint_composite_mode (
                                                                            gimp_context_get_paint_mode (GIMP_CONTEXT (options))),
                                  NULL, (gint) mask_x, mask_y);
      g_object_unref (buffer);

      gimp_drawable_update (drawable, mask_x, mask_y, width, height);
    }
  gimp_unset_busy (image->gimp);
}

static void
tool_manager_connect_options (GimpToolManager *tool_manager,
                              GimpContext     *user_context,
                              GimpToolInfo    *tool_info)
{
  if (tool_info->context_props)
    {
      GimpCoreConfig      *config       = user_context->gimp->config;
      GimpContextPropMask  global_props = 0;

      /*  FG and BG are always shared between all tools  */
      global_props |= GIMP_CONTEXT_PROP_MASK_FOREGROUND;
      global_props |= GIMP_CONTEXT_PROP_MASK_BACKGROUND;

      if (config->global_brush)
        global_props |= GIMP_CONTEXT_PROP_MASK_BRUSH;
      if (config->global_dynamics)
        global_props |= GIMP_CONTEXT_PROP_MASK_DYNAMICS;
      if (config->global_pattern)
        global_props |= GIMP_CONTEXT_PROP_MASK_PATTERN;
      if (config->global_palette)
        global_props |= GIMP_CONTEXT_PROP_MASK_PALETTE;
      if (config->global_gradient)
        global_props |= GIMP_CONTEXT_PROP_MASK_GRADIENT;
      if (config->global_font)
        global_props |= GIMP_CONTEXT_PROP_MASK_FONT;

      gimp_context_copy_properties (GIMP_CONTEXT (tool_info->tool_options),
                                    user_context,
                                    tool_info->context_props & ~global_props);
      gimp_context_set_parent (GIMP_CONTEXT (tool_info->tool_options),
                               user_context);

      if (GIMP_IS_PAINT_OPTIONS (tool_info->tool_options))
        {
          if (config->global_brush)
            gimp_paint_options_copy_brush_props (tool_manager->shared_paint_options,
                                                 GIMP_PAINT_OPTIONS (tool_info->tool_options));

          if (config->global_dynamics)
            gimp_paint_options_copy_dynamics_props (tool_manager->shared_paint_options,
                                                    GIMP_PAINT_OPTIONS (tool_info->tool_options));

          if (config->global_gradient)
            gimp_paint_options_copy_gradient_props (tool_manager->shared_paint_options,
                                                    GIMP_PAINT_OPTIONS (tool_info->tool_options));
        }
    }
}

GimpBrushApplicationMode
gimp_paint_options_get_brush_mode (GimpPaintOptions *paint_options)
{
  GimpDynamics       *dynamics;
  GimpDynamicsOutput *force_output;
  gboolean            dynamic_force = FALSE;

  g_return_val_if_fail (GIMP_IS_PAINT_OPTIONS (paint_options), GIMP_BRUSH_SOFT);

  if (paint_options->hard)
    return GIMP_BRUSH_HARD;

  dynamics = gimp_context_get_dynamics (GIMP_CONTEXT (paint_options));

  force_output = gimp_dynamics_get_output (dynamics,
                                           GIMP_DYNAMICS_OUTPUT_FORCE);

  if (force_output)
    dynamic_force = gimp_dynamics_output_is_enabled (force_output);

  if (dynamic_force || (paint_options->brush_force > 0.0))
    return GIMP_BRUSH_PRESSURE;

  return GIMP_BRUSH_SOFT;
}

void
tool_presets_save_cmd_callback (GtkAction *action,
                                gpointer   data)
{
  GimpContainerEditor *editor = GIMP_CONTAINER_EDITOR (data);
  GimpContext         *context;
  GimpToolPreset      *preset;
  GimpToolInfo        *tool_info;

  context = gimp_container_view_get_context (editor->view);

  preset    = gimp_context_get_tool_preset (context);
  tool_info = gimp_context_get_tool (gimp_get_user_context (context->gimp));

  if (tool_info && preset)
    {
      GimpToolInfo *preset_tool;

      preset_tool =  gimp_context_get_tool (GIMP_CONTEXT (preset->tool_options));

      if (tool_info != preset_tool)
        {
          gimp_message (context->gimp,
                        G_OBJECT (editor), GIMP_MESSAGE_WARNING,
                        _("Can't save '%s' tool options to an "
                          "existing '%s' tool preset."),
                        tool_info->blurb,
                        preset_tool->blurb);
          return;
        }

      gimp_config_sync (G_OBJECT (tool_info->tool_options),
                        G_OBJECT (preset->tool_options), 0);
    }
}

void
gimp_paint_options_set_default_brush_hardness (GimpPaintOptions *paint_options,
                                               GimpBrush        *brush)
{
  g_return_if_fail (GIMP_IS_PAINT_OPTIONS (paint_options));
  g_return_if_fail (brush == NULL || GIMP_IS_BRUSH (brush));

  if (! brush)
    brush = gimp_context_get_brush (GIMP_CONTEXT (paint_options));

  if (GIMP_IS_BRUSH_GENERATED (brush))
    {
      GimpBrushGenerated *generated_brush = GIMP_BRUSH_GENERATED (brush);

      g_object_set (paint_options,
                    "brush-hardness", (gdouble) gimp_brush_generated_get_hardness (generated_brush),
                    NULL);
    }
  else
    {
      g_object_set (paint_options,
                    "brush-hardness", DEFAULT_BRUSH_HARDNESS,
                    NULL);
    }
}