Adding upstream version 2.10.22.upstream/2.10.22upstream

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

1 files changed, 824 insertions, 0 deletions

diff --git a/app/widgets/gimpfgbgeditor.c b/app/widgets/gimpfgbgeditor.c
new file mode 100644
index 0000000..96d2156
--- /dev/null
+++ b/app/widgets/gimpfgbgeditor.c
@@ -0,0 +1,824 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpfgbgeditor.c
+ * Copyright (C) 2004 Michael Natterer <mitch@gimp.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <string.h>
+
+#include <gegl.h>
+#include <gtk/gtk.h>
+
+#include "libgimpcolor/gimpcolor.h"
+#include "libgimpconfig/gimpconfig.h"
+#include "libgimpwidgets/gimpwidgets.h"
+
+#include "widgets-types.h"
+
+#include "config/gimpcoreconfig.h"
+
+#include "core/gimp.h"
+#include "core/gimpcontext.h"
+#include "core/gimpimage.h"
+#include "core/gimpimage-colormap.h"
+#include "core/gimpmarshal.h"
+#include "core/gimppalette.h"
+
+#include "gimpdnd.h"
+#include "gimpfgbgeditor.h"
+#include "gimpwidgets-utils.h"
+
+#define CHANNEL_EPSILON 1e-3
+
+enum
+{
+  PROP_0,
+  PROP_CONTEXT,
+  PROP_ACTIVE_COLOR
+};
+
+enum
+{
+  COLOR_CLICKED,
+  TOOLTIP,
+  LAST_SIGNAL
+};
+
+
+static void     gimp_fg_bg_editor_dispose           (GObject          *object);
+static void     gimp_fg_bg_editor_set_property      (GObject          *object,
+                                                     guint             property_id,
+                                                     const GValue     *value,
+                                                     GParamSpec       *pspec);
+static void     gimp_fg_bg_editor_get_property      (GObject          *object,
+                                                     guint             property_id,
+                                                     GValue           *value,
+                                                     GParamSpec       *pspec);
+
+static void     gimp_fg_bg_editor_style_set         (GtkWidget        *widget,
+                                                     GtkStyle         *prev_style);
+static gboolean gimp_fg_bg_editor_expose            (GtkWidget        *widget,
+                                                     GdkEventExpose   *eevent);
+static gboolean gimp_fg_bg_editor_button_press      (GtkWidget        *widget,
+                                                     GdkEventButton   *bevent);
+static gboolean gimp_fg_bg_editor_button_release    (GtkWidget        *widget,
+                                                     GdkEventButton   *bevent);
+static gboolean gimp_fg_bg_editor_drag_motion       (GtkWidget        *widget,
+                                                     GdkDragContext   *context,
+                                                     gint              x,
+                                                     gint              y,
+                                                     guint             time);
+static gboolean gimp_fg_bg_editor_query_tooltip     (GtkWidget        *widget,
+                                                     gint              x,
+                                                     gint              y,
+                                                     gboolean          keyboard_mode,
+                                                     GtkTooltip       *tooltip);
+
+static void     gimp_fg_bg_editor_drag_color        (GtkWidget        *widget,
+                                                     GimpRGB          *color,
+                                                     gpointer          data);
+static void     gimp_fg_bg_editor_drop_color        (GtkWidget        *widget,
+                                                     gint              x,
+                                                     gint              y,
+                                                     const GimpRGB    *color,
+                                                     gpointer          data);
+
+static void     gimp_fg_bg_editor_create_transform  (GimpFgBgEditor   *editor);
+static void     gimp_fg_bg_editor_destroy_transform (GimpFgBgEditor   *editor);
+
+static void     gimp_fg_bg_editor_image_changed     (GimpFgBgEditor   *editor,
+                                                     GimpImage        *image);
+
+static void     gimp_fg_bg_editor_draw_color_frame  (GimpFgBgEditor   *editor,
+                                                     cairo_t          *cr,
+                                                     const GimpRGB    *color,
+                                                     gint              x,
+                                                     gint              y,
+                                                     gint              width,
+                                                     gint              height,
+                                                     gint              corner_dx,
+                                                     gint              corner_dy);
+
+G_DEFINE_TYPE (GimpFgBgEditor, gimp_fg_bg_editor, GTK_TYPE_EVENT_BOX)
+
+#define parent_class gimp_fg_bg_editor_parent_class
+
+static guint  editor_signals[LAST_SIGNAL] = { 0 };
+
+
+static void
+gimp_fg_bg_editor_class_init (GimpFgBgEditorClass *klass)
+{
+  GObjectClass   *object_class = G_OBJECT_CLASS (klass);
+  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+
+  editor_signals[COLOR_CLICKED] =
+    g_signal_new ("color-clicked",
+                  G_TYPE_FROM_CLASS (klass),
+                  G_SIGNAL_RUN_FIRST,
+                  G_STRUCT_OFFSET (GimpFgBgEditorClass, color_clicked),
+                  NULL, NULL,
+                  gimp_marshal_VOID__ENUM,
+                  G_TYPE_NONE, 1,
+                  GIMP_TYPE_ACTIVE_COLOR);
+
+  editor_signals[TOOLTIP] =
+    g_signal_new ("tooltip",
+                  G_TYPE_FROM_CLASS (klass),
+                  G_SIGNAL_RUN_FIRST,
+                  G_STRUCT_OFFSET (GimpFgBgEditorClass, tooltip),
+                  NULL, NULL,
+                  gimp_marshal_VOID__INT_OBJECT,
+                  G_TYPE_NONE, 2,
+                  G_TYPE_INT,
+                  GTK_TYPE_TOOLTIP);
+
+  object_class->dispose              = gimp_fg_bg_editor_dispose;
+  object_class->set_property         = gimp_fg_bg_editor_set_property;
+  object_class->get_property         = gimp_fg_bg_editor_get_property;
+
+  widget_class->style_set            = gimp_fg_bg_editor_style_set;
+  widget_class->expose_event         = gimp_fg_bg_editor_expose;
+  widget_class->button_press_event   = gimp_fg_bg_editor_button_press;
+  widget_class->button_release_event = gimp_fg_bg_editor_button_release;
+  widget_class->drag_motion          = gimp_fg_bg_editor_drag_motion;
+  widget_class->query_tooltip        = gimp_fg_bg_editor_query_tooltip;
+
+  g_object_class_install_property (object_class, PROP_CONTEXT,
+                                   g_param_spec_object ("context",
+                                                        NULL, NULL,
+                                                        GIMP_TYPE_CONTEXT,
+                                                        GIMP_PARAM_READWRITE));
+
+  g_object_class_install_property (object_class, PROP_ACTIVE_COLOR,
+                                   g_param_spec_enum ("active-color",
+                                                      NULL, NULL,
+                                                      GIMP_TYPE_ACTIVE_COLOR,
+                                                      GIMP_ACTIVE_COLOR_FOREGROUND,
+                                                      GIMP_PARAM_READWRITE));
+}
+
+static void
+gimp_fg_bg_editor_init (GimpFgBgEditor *editor)
+{
+  editor->active_color = GIMP_ACTIVE_COLOR_FOREGROUND;
+
+  gtk_event_box_set_visible_window (GTK_EVENT_BOX (editor), FALSE);
+
+  gtk_widget_add_events (GTK_WIDGET (editor),
+                         GDK_BUTTON_PRESS_MASK |
+                         GDK_BUTTON_RELEASE_MASK);
+
+  gimp_dnd_color_source_add (GTK_WIDGET (editor),
+                             gimp_fg_bg_editor_drag_color, NULL);
+  gimp_dnd_color_dest_add (GTK_WIDGET (editor),
+                           gimp_fg_bg_editor_drop_color, NULL);
+
+  gimp_widget_track_monitor (GTK_WIDGET (editor),
+                             G_CALLBACK (gimp_fg_bg_editor_destroy_transform),
+                             NULL);
+}
+
+static void
+gimp_fg_bg_editor_dispose (GObject *object)
+{
+  GimpFgBgEditor *editor = GIMP_FG_BG_EDITOR (object);
+
+  if (editor->context)
+    gimp_fg_bg_editor_set_context (editor, NULL);
+
+  g_clear_object (&editor->default_icon);
+  g_clear_object (&editor->swap_icon);
+
+  G_OBJECT_CLASS (parent_class)->dispose (object);
+}
+
+static void
+gimp_fg_bg_editor_set_property (GObject      *object,
+                                guint         property_id,
+                                const GValue *value,
+                                GParamSpec   *pspec)
+{
+  GimpFgBgEditor *editor = GIMP_FG_BG_EDITOR (object);
+
+  switch (property_id)
+    {
+    case PROP_CONTEXT:
+      gimp_fg_bg_editor_set_context (editor, g_value_get_object (value));
+      break;
+    case PROP_ACTIVE_COLOR:
+      gimp_fg_bg_editor_set_active (editor, g_value_get_enum (value));
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static void
+gimp_fg_bg_editor_get_property (GObject    *object,
+                                guint       property_id,
+                                GValue     *value,
+                                GParamSpec *pspec)
+{
+  GimpFgBgEditor *editor = GIMP_FG_BG_EDITOR (object);
+
+  switch (property_id)
+    {
+    case PROP_CONTEXT:
+      g_value_set_object (value, editor->context);
+      break;
+    case PROP_ACTIVE_COLOR:
+      g_value_set_enum (value, editor->active_color);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static void
+gimp_fg_bg_editor_style_set (GtkWidget *widget,
+                             GtkStyle  *prev_style)
+{
+  GimpFgBgEditor *editor = GIMP_FG_BG_EDITOR (widget);
+
+  GTK_WIDGET_CLASS (parent_class)->style_set (widget, prev_style);
+
+  g_clear_object (&editor->default_icon);
+  g_clear_object (&editor->swap_icon);
+}
+
+static gboolean
+gimp_fg_bg_editor_expose (GtkWidget      *widget,
+                          GdkEventExpose *eevent)
+{
+  GimpFgBgEditor *editor = GIMP_FG_BG_EDITOR (widget);
+  cairo_t        *cr;
+  GtkAllocation   allocation;
+  gint            width, height;
+  gint            default_w, default_h;
+  gint            swap_w, swap_h;
+  gint            rect_w, rect_h;
+  GimpRGB         color;
+
+  if (! gtk_widget_is_drawable (widget))
+    return FALSE;
+
+  cr = gdk_cairo_create (eevent->window);
+  gdk_cairo_region (cr, eevent->region);
+  cairo_clip (cr);
+
+  gtk_widget_get_allocation (widget, &allocation);
+
+  width  = allocation.width;
+  height = allocation.height;
+
+  cairo_translate (cr, allocation.x, allocation.y);
+
+  /*  draw the default colors pixbuf  */
+  if (! editor->default_icon)
+    editor->default_icon = gimp_widget_load_icon (widget,
+                                                  GIMP_ICON_COLORS_DEFAULT, 12);
+
+  default_w = gdk_pixbuf_get_width  (editor->default_icon);
+  default_h = gdk_pixbuf_get_height (editor->default_icon);
+
+  if (default_w < width / 2 && default_h < height / 2)
+    {
+      gdk_cairo_set_source_pixbuf (cr, editor->default_icon,
+                                   0, height - default_h);
+      cairo_paint (cr);
+    }
+  else
+    {
+      default_w = default_h = 0;
+    }
+
+  /*  draw the swap colors pixbuf  */
+  if (! editor->swap_icon)
+    editor->swap_icon = gimp_widget_load_icon (widget,
+                                               GIMP_ICON_COLORS_SWAP, 12);
+
+  swap_w = gdk_pixbuf_get_width  (editor->swap_icon);
+  swap_h = gdk_pixbuf_get_height (editor->swap_icon);
+
+  if (swap_w < width / 2 && swap_h < height / 2)
+    {
+      gdk_cairo_set_source_pixbuf (cr, editor->swap_icon,
+                                   width - swap_w, 0);
+      cairo_paint (cr);
+    }
+  else
+    {
+      swap_w = swap_h = 0;
+    }
+
+  rect_h = height - MAX (default_h, swap_h) - 2;
+  rect_w = width  - MAX (default_w, swap_w) - 4;
+
+  if (rect_h > (height * 3 / 4))
+    rect_w = MAX (rect_w - (rect_h - ((height * 3 / 4))),
+                  width * 2 / 3);
+
+  editor->rect_width  = rect_w;
+  editor->rect_height = rect_h;
+
+  if (! editor->transform)
+    gimp_fg_bg_editor_create_transform (editor);
+
+  if (editor->context)
+    {
+      /*  draw the background frame  */
+      gimp_context_get_background (editor->context, &color);
+      gimp_fg_bg_editor_draw_color_frame (editor, cr, &color,
+                                          width - rect_w, height - rect_h,
+                                          rect_w,         rect_h,
+                                          +1,             +1);
+
+
+      /*  draw the foreground frame  */
+      gimp_context_get_foreground (editor->context, &color);
+      gimp_fg_bg_editor_draw_color_frame (editor, cr, &color,
+                                          0,              0,
+                                          rect_w,         rect_h,
+                                          -1,             -1);
+    }
+
+  cairo_destroy (cr);
+
+  return TRUE;
+}
+
+static GimpFgBgTarget
+gimp_fg_bg_editor_target (GimpFgBgEditor *editor,
+                          gint            x,
+                          gint            y)
+{
+  GtkAllocation allocation;
+  gint          width;
+  gint          height;
+  gint          rect_w = editor->rect_width;
+  gint          rect_h = editor->rect_height;
+
+  gtk_widget_get_allocation (GTK_WIDGET (editor), &allocation);
+
+  width  = allocation.width;
+  height = allocation.height;
+
+  if (x > 0 && x < rect_w && y > 0 && y < rect_h)
+    {
+      return GIMP_FG_BG_TARGET_FOREGROUND;
+    }
+  else if (x > (width - rect_w)  && x < width  &&
+           y > (height - rect_h) && y < height)
+    {
+      return GIMP_FG_BG_TARGET_BACKGROUND;
+    }
+  else if (x > 0      && x < (width - rect_w) &&
+           y > rect_h && y < height)
+    {
+      return GIMP_FG_BG_TARGET_DEFAULT;
+    }
+  else if (x > rect_w && x < width &&
+           y > 0      && y < (height - rect_h))
+    {
+      return GIMP_FG_BG_TARGET_SWAP;
+    }
+
+  return GIMP_FG_BG_TARGET_INVALID;
+}
+
+static gboolean
+gimp_fg_bg_editor_button_press (GtkWidget      *widget,
+                                GdkEventButton *bevent)
+{
+  GimpFgBgEditor *editor = GIMP_FG_BG_EDITOR (widget);
+
+  if (bevent->button == 1 && bevent->type == GDK_BUTTON_PRESS)
+    {
+      GimpFgBgTarget target = gimp_fg_bg_editor_target (editor,
+                                                        bevent->x, bevent->y);
+
+      editor->click_target = GIMP_FG_BG_TARGET_INVALID;
+
+      switch (target)
+        {
+        case GIMP_FG_BG_TARGET_FOREGROUND:
+          if (editor->active_color != GIMP_ACTIVE_COLOR_FOREGROUND)
+            gimp_fg_bg_editor_set_active (editor,
+                                          GIMP_ACTIVE_COLOR_FOREGROUND);
+          editor->click_target = GIMP_FG_BG_TARGET_FOREGROUND;
+          break;
+
+        case GIMP_FG_BG_TARGET_BACKGROUND:
+          if (editor->active_color != GIMP_ACTIVE_COLOR_BACKGROUND)
+            gimp_fg_bg_editor_set_active (editor,
+                                          GIMP_ACTIVE_COLOR_BACKGROUND);
+          editor->click_target = GIMP_FG_BG_TARGET_BACKGROUND;
+          break;
+
+        case GIMP_FG_BG_TARGET_SWAP:
+          if (editor->context)
+            gimp_context_swap_colors (editor->context);
+          break;
+
+        case GIMP_FG_BG_TARGET_DEFAULT:
+          if (editor->context)
+            gimp_context_set_default_colors (editor->context);
+          break;
+
+        default:
+          break;
+        }
+    }
+
+  return FALSE;
+}
+
+static gboolean
+gimp_fg_bg_editor_button_release (GtkWidget      *widget,
+                                  GdkEventButton *bevent)
+{
+  GimpFgBgEditor *editor = GIMP_FG_BG_EDITOR (widget);
+
+  if (bevent->button == 1)
+    {
+      GimpFgBgTarget target = gimp_fg_bg_editor_target (editor,
+                                                        bevent->x, bevent->y);
+
+      if (target == editor->click_target)
+        {
+          switch (target)
+            {
+            case GIMP_FG_BG_TARGET_FOREGROUND:
+              g_signal_emit (editor, editor_signals[COLOR_CLICKED], 0,
+                             GIMP_ACTIVE_COLOR_FOREGROUND);
+              break;
+
+            case GIMP_FG_BG_TARGET_BACKGROUND:
+              g_signal_emit (editor, editor_signals[COLOR_CLICKED], 0,
+                             GIMP_ACTIVE_COLOR_BACKGROUND);
+              break;
+
+            default:
+              break;
+            }
+        }
+
+      editor->click_target = GIMP_FG_BG_TARGET_INVALID;
+    }
+
+  return FALSE;
+}
+
+static gboolean
+gimp_fg_bg_editor_drag_motion (GtkWidget      *widget,
+                               GdkDragContext *context,
+                               gint            x,
+                               gint            y,
+                               guint           time)
+{
+  GimpFgBgEditor *editor = GIMP_FG_BG_EDITOR (widget);
+  GimpFgBgTarget  target = gimp_fg_bg_editor_target (editor, x, y);
+
+  if (target == GIMP_FG_BG_TARGET_FOREGROUND ||
+      target == GIMP_FG_BG_TARGET_BACKGROUND)
+    {
+      gdk_drag_status (context, GDK_ACTION_COPY, time);
+
+      return TRUE;
+    }
+
+  gdk_drag_status (context, 0, time);
+
+  return FALSE;
+}
+
+static gboolean
+gimp_fg_bg_editor_query_tooltip (GtkWidget  *widget,
+                                 gint        x,
+                                 gint        y,
+                                 gboolean    keyboard_mode,
+                                 GtkTooltip *tooltip)
+{
+  if (! keyboard_mode)
+    {
+      GimpFgBgEditor *editor = GIMP_FG_BG_EDITOR (widget);
+      GimpFgBgTarget  target = gimp_fg_bg_editor_target (editor, x, y);
+
+      if (target != GIMP_FG_BG_TARGET_INVALID)
+        {
+          g_signal_emit (widget, editor_signals[TOOLTIP], 0,
+                         target, tooltip);
+
+          return TRUE;
+        }
+    }
+
+  return FALSE;
+}
+
+
+/*  public functions  */
+
+GtkWidget *
+gimp_fg_bg_editor_new (GimpContext *context)
+{
+  g_return_val_if_fail (context == NULL || GIMP_IS_CONTEXT (context), NULL);
+
+  return g_object_new (GIMP_TYPE_FG_BG_EDITOR,
+                       "context", context,
+                       NULL);
+}
+
+void
+gimp_fg_bg_editor_set_context (GimpFgBgEditor *editor,
+                               GimpContext    *context)
+{
+  g_return_if_fail (GIMP_IS_FG_BG_EDITOR (editor));
+  g_return_if_fail (context == NULL || GIMP_IS_CONTEXT (context));
+
+  if (context != editor->context)
+    {
+      if (editor->context)
+        {
+          g_signal_handlers_disconnect_by_func (editor->context,
+                                                gtk_widget_queue_draw,
+                                                editor);
+          g_signal_handlers_disconnect_by_func (editor->context,
+                                                G_CALLBACK (gimp_fg_bg_editor_image_changed),
+                                                editor);
+          g_object_unref (editor->context);
+
+          g_signal_handlers_disconnect_by_func (editor->color_config,
+                                                gimp_fg_bg_editor_destroy_transform,
+                                                editor);
+          g_clear_object (&editor->color_config);
+        }
+
+      editor->context = context;
+
+      if (context)
+        {
+          g_object_ref (context);
+
+          g_signal_connect_swapped (context, "foreground-changed",
+                                    G_CALLBACK (gtk_widget_queue_draw),
+                                    editor);
+          g_signal_connect_swapped (context, "background-changed",
+                                    G_CALLBACK (gtk_widget_queue_draw),
+                                    editor);
+          g_signal_connect_swapped (context, "image-changed",
+                                    G_CALLBACK (gimp_fg_bg_editor_image_changed),
+                                    editor);
+
+          editor->color_config = g_object_ref (context->gimp->config->color_management);
+
+          g_signal_connect_swapped (editor->color_config, "notify",
+                                    G_CALLBACK (gimp_fg_bg_editor_destroy_transform),
+                                    editor);
+        }
+
+      gimp_fg_bg_editor_destroy_transform (editor);
+
+      g_object_notify (G_OBJECT (editor), "context");
+    }
+}
+
+void
+gimp_fg_bg_editor_set_active (GimpFgBgEditor  *editor,
+                              GimpActiveColor  active)
+{
+  g_return_if_fail (GIMP_IS_FG_BG_EDITOR (editor));
+
+  editor->active_color = active;
+  gtk_widget_queue_draw (GTK_WIDGET (editor));
+  g_object_notify (G_OBJECT (editor), "active-color");
+}
+
+
+/*  private functions  */
+
+static void
+gimp_fg_bg_editor_drag_color (GtkWidget *widget,
+                              GimpRGB   *color,
+                              gpointer   data)
+{
+  GimpFgBgEditor *editor = GIMP_FG_BG_EDITOR (widget);
+
+  if (editor->context)
+    {
+      switch (editor->active_color)
+        {
+        case GIMP_ACTIVE_COLOR_FOREGROUND:
+          gimp_context_get_foreground (editor->context, color);
+          break;
+
+        case GIMP_ACTIVE_COLOR_BACKGROUND:
+          gimp_context_get_background (editor->context, color);
+          break;
+        }
+    }
+}
+
+static void
+gimp_fg_bg_editor_drop_color (GtkWidget     *widget,
+                              gint           x,
+                              gint           y,
+                              const GimpRGB *color,
+                              gpointer       data)
+{
+  GimpFgBgEditor *editor = GIMP_FG_BG_EDITOR (widget);
+
+  if (editor->context)
+    {
+      switch (gimp_fg_bg_editor_target (editor, x, y))
+        {
+        case GIMP_FG_BG_TARGET_FOREGROUND:
+          gimp_context_set_foreground (editor->context, color);
+          break;
+
+        case GIMP_FG_BG_TARGET_BACKGROUND:
+          gimp_context_set_background (editor->context, color);
+          break;
+
+        default:
+          break;
+        }
+    }
+}
+
+static void
+gimp_fg_bg_editor_create_transform (GimpFgBgEditor *editor)
+{
+  if (editor->color_config)
+    {
+      static GimpColorProfile *profile = NULL;
+
+      if (G_UNLIKELY (! profile))
+        profile = gimp_color_profile_new_rgb_srgb ();
+
+      editor->transform =
+        gimp_widget_get_color_transform (GTK_WIDGET (editor),
+                                         editor->color_config,
+                                         profile,
+                                         babl_format ("R'G'B'A double"),
+                                         babl_format ("R'G'B'A double"));
+    }
+}
+
+static void
+gimp_fg_bg_editor_destroy_transform (GimpFgBgEditor *editor)
+{
+  g_clear_object (&editor->transform);
+
+  gtk_widget_queue_draw (GTK_WIDGET (editor));
+}
+
+static void
+gimp_fg_bg_editor_image_changed (GimpFgBgEditor *editor,
+                                 GimpImage      *image)
+{
+  gtk_widget_queue_draw (GTK_WIDGET (editor));
+
+  if (editor->active_image)
+    {
+      g_signal_handlers_disconnect_by_func (editor->active_image,
+                                            G_CALLBACK (gtk_widget_queue_draw),
+                                            editor);
+      if (gimp_image_get_base_type (editor->active_image) == GIMP_INDEXED)
+        {
+          GimpPalette *palette;
+
+          palette = gimp_image_get_colormap_palette (editor->active_image);
+          g_signal_handlers_disconnect_by_func (palette,
+                                                G_CALLBACK (gtk_widget_queue_draw),
+                                                editor);
+        }
+    }
+  editor->active_image = image;
+  if (image)
+    {
+      g_signal_connect_swapped (image, "notify::base-type",
+                                G_CALLBACK (gtk_widget_queue_draw),
+                                editor);
+      g_signal_connect_swapped (image, "colormap-changed",
+                                G_CALLBACK (gtk_widget_queue_draw),
+                                editor);
+
+      if (gimp_image_get_base_type (image) == GIMP_INDEXED)
+        {
+          GimpPalette *palette;
+
+          palette = gimp_image_get_colormap_palette (editor->active_image);
+          g_signal_connect_swapped (palette, "dirty",
+                                    G_CALLBACK (gtk_widget_queue_draw),
+                                    editor);
+        }
+    }
+}
+
+static void
+gimp_fg_bg_editor_draw_color_frame (GimpFgBgEditor *editor,
+                                    cairo_t        *cr,
+                                    const GimpRGB  *color,
+                                    gint            x,
+                                    gint            y,
+                                    gint            width,
+                                    gint            height,
+                                    gint            corner_dx,
+                                    gint            corner_dy)
+{
+  GimpPalette       *colormap_palette = NULL;
+  GimpImageBaseType  base_type        = GIMP_RGB;
+  GimpRGB            transformed_color;
+
+  if (editor->active_image)
+    {
+      base_type = gimp_image_get_base_type (editor->active_image);
+
+      if (base_type == GIMP_INDEXED)
+        {
+          colormap_palette = gimp_image_get_colormap_palette (
+            editor->active_image);
+        }
+    }
+
+  if (editor->transform)
+    {
+      gimp_color_transform_process_pixels (editor->transform,
+                                           babl_format ("R'G'B'A double"),
+                                           color,
+                                           babl_format ("R'G'B'A double"),
+                                           &transformed_color,
+                                           1);
+    }
+  else
+    {
+      transformed_color = *color;
+    }
+
+  cairo_save (cr);
+
+  gimp_cairo_set_source_rgb (cr, &transformed_color);
+
+  cairo_rectangle (cr, x, y, width, height);
+  cairo_fill (cr);
+
+  if (editor->color_config &&
+      /* Common out-of-gamut case */
+      ((color->r < 0.0 || color->r > 1.0 ||
+        color->g < 0.0 || color->g > 1.0 ||
+        color->b < 0.0 || color->b > 1.0) ||
+       /* Indexed images */
+       (colormap_palette &&
+        ! gimp_palette_find_entry (colormap_palette, color, NULL)) ||
+       /* Grayscale images */
+       (base_type == GIMP_GRAY &&
+        (ABS (color->r - color->g) > CHANNEL_EPSILON ||
+         ABS (color->r - color->b) > CHANNEL_EPSILON ||
+         ABS (color->g - color->b) > CHANNEL_EPSILON))))
+    {
+      gint corner_x = x + 0.5 * (1.0 + corner_dx) * width;
+      gint corner_y = y + 0.5 * (1.0 + corner_dy) * height;
+      gint side     = MIN (width, height) * 2 / 3;
+
+      cairo_move_to (cr, corner_x, corner_y);
+      cairo_line_to (cr, corner_x + side * corner_dx, corner_y);
+      cairo_line_to (cr, corner_x, corner_y + side * corner_dy);
+      cairo_close_path (cr);
+
+      gimp_cairo_set_source_rgb (cr,
+                                 &editor->color_config->out_of_gamut_color);
+      cairo_fill (cr);
+    }
+
+  cairo_set_line_width (cr, 1.0);
+
+  cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
+  cairo_rectangle (cr, x + 0.5, y + 0.5, width - 1.0, height - 1.0);
+  cairo_stroke (cr);
+
+  cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
+  cairo_rectangle (cr, x + 1.5, y + 1.5, width - 3.0, height - 3.0);
+  cairo_stroke (cr);
+
+  cairo_restore (cr);
+}